上海4197龙凤

Title: acoustic word embeddings for end-to-end speech synthesis (end-to-end speech synthesis based on acoustic word embedding)

Journal: Applied Sciences

Authors: Feiyu Shen, Chenpeng Du and Kai Yu,

Publication date: 27 September 2021

DOI：10.3390/app11199010

Wechat link:

https://mp.weixin.qq.com/s? __biz=MzI1MzEzNjgxMQ==&mid=2650042375&idx=2&sn=

151c5c62ae0d5583c474b10c284d5428&chksm=f1d9cac3c6ae43d556bf64fb78ad7179

03d668684fdcafaee7dd0ffd1d686fc17a573d1c6c20&token=497878244&lang=zh_CN#rd

Journal link:

https://www.mdpi.com/journal/applsci

Introduction of communication author

Professor Yu Kai

Shanghai Jiao Tong University

The main research direction is the research and industrialization of interactive artificial intelligence, speech and natural language processing and machine learning.

Speech synthesis is one of the key issues to realize human-computer interaction. Yu Kai’s team from the Cross-media Speech Intelligence Laboratory of Shanghai Jiaotong University recentlyApplied SciencesIn this paper, an end-to-end speech synthesis method based on acoustic word embedding is studied.

introduction

In recent years, the end-to-end text-to-speech synthesis (TTS) model based on sequence-to-sequence generation architecture has achieved great success in generating natural speech. In order to avoid frame-by-frame decreasing, unnatural TTS models, such as FastSpeech and FastSpeech2, are proposed to improve the speed of speech generation. However, vocabulary recognition is very important for TTS systems to generate highly natural speech, but most end-to-end TTS systems only use phonemes as input markers, ignoring the information of which vocabulary phonemes come from.

Previous studies used preset language words to embed phoneme sequences as the input of TTS system. However, because language information is not directly related to how words are pronounced, the embedding of these words hardly affects the improvement of TTS quality. In this paper, a word acoustic embedding method combined with TTS system is proposed. Experiments on LJSpeech data set show that the acoustic embedding of words significantly improves the likelihood of prosodic prediction of sonic level on training set and verification set. The subjective evaluation of the naturalness of synthesized audio shows that the system with acoustic word embedding is obviously superior to the pure TTS system and other TTS systems with preset word embedding.

design highlights

1. Propose an end-to-end TTS system based on Acoustic Word Embedding (AWE) joint training to help improve rhythm and naturalness;

2. Using the prosody modeling method based on GMM to objectively measure the prosody of synthesized audio;

3. Explore the best structure of word encoder and the best threshold of word frequency screening;

4. Subjective evaluation after the test shows that AWE is more natural than pre-trained word embedding.

End-to-end speech synthesis method based on acoustic word embedding

Part1: end-to-end speech synthesis

In this paper, FastSpeech2 is selected as the acoustic model, but prosody modeling is not explicitly considered, which makes it difficult to objectively evaluate the prosody prediction performance of TTS system without subjective listening test. Based on this, a phoneme-level prosodic prediction module is introduced into the model, which can predict the prosodic embedding distribution of each phoneme autoregressively. Compared with the standard Fastspeech2 system, it can not only improve naturalness, but also allow the logarithmic likelihood of prosodic embedding to easily and objectively evaluate the prosodic prediction performance at phoneme level, as shown in Figure 1.

Figure 1. End-to-end speech synthesis based on GMM prosody modeling.

Part2: Acoustic Word Embedding

Nowadays, most popular TTS systems use phonemes as sound input markers, ignoring the information of which vocabulary phonemes come from. However, vocabulary recognition is very important for TTS system to generate highly natural speech. In this paper, acoustic word embedding is proposed to synthesize natural speech, and a word encoder and a word phoneme aligner are introduced into the traditional TTS system. The architecture is shown in Figure 2.

Figure 2. Model architecture with acoustic word embedding.

Experimental setup and results

1. Experimental setup

The TTS model in this paper is based on Fastspeech2 (GMM prosodic modeling). The number of Gaussian components in GMM is set to 20, and Adam optimizer and Noam learning rate scheduling strategy are used for TTS training. The researchers used 320mel-spectrogram as acoustic features, with a frame shift of 12.5ms and a frame length of 50 ms.. MelGAN is used as vocoder to reconstruct waveform.

2. Word encoder architecture

The performance of three common word encoder structures is compared.

(1) None: the baseline of the word encoder is not used;

(2) BLSTM；: a layer of 512-dimensional bidirectional LSTM;

(3) Transformer: 6-layer 512-dimensional transformer module;

(4) Conv+Transformer: one layer of 1D-CNN with a core size of 3, followed by six layers of 512-dimensional Transformer module.

Table 1. Parameter number and reasoning speed of various encoder architectures (sec/frame).

3. Word frequency threshold

Table 2. Vocabulary and OOV under different word frequency thresholds.

Fig. 3. Loglikelihood curve of phoneme prosody with different word frequency thresholds.

conclusion

In this paper, an innovative method of directly training acoustic embedding of words in TTS system is proposed. The phoneme sequence and the word sequence pass through two encoders respectively, which are used as the input of TTS system together, and then the two output hidden states are spliced together for phoneme-level prosodic prediction. Experiments on LJSpeech data set show that the superposition structure of convolution and Transformer is the best for word encoder. In addition, the selection of word frequency threshold should be cautious, too large or too small threshold will lead to performance degradation. Finally, this paper compares the proposed system with several works that do not use the baseline of lexical information and use pre-trained words to embed. The subjective listening test shows that the system proposed in this paper is superior to all other systems in naturalness.

Applied SciencesPeriodical introduction

Editor-in-Chief: Takayoshi Kobayashi, The University of Electro-Communications, Japan.

The subject of the journal covers all aspects of applied physics, applied chemistry, engineering, environmental and earth sciences and applied biology.

　　Iraq’s Ahdab oil field project. Photo courtesy of China Petroleum Middle East Company

　　"We have prepared brochures for the villagers to introduce them to some environmental protection and safety knowledge, including how to prevent and treat hydrogen sulfide, protect underground pipelines in oil fields, prevent electric shock, and protect farmland." Abid said. At 9 o’clock in the morning, Iraqi boy Abid and Hussein came to the village near Alar Town, Kut City, Iraq to carry out environmental protection and safety knowledge publicity activities. As members of the Green Action Team of the Ahead Oil Field Project, they shoulder the responsibility of publicizing the concept of green environmental protection, coordinating community relations and ensuring safe production, and undertake the task of green and sustainable development of the Ahead Oil Field.

　　Iraq’s Ahdab Oilfield Project, located in Kut, Wasit Province, 180 kilometers southeast of Baghdad, is the first foreign oil cooperation project in which China enterprises participated after the war in Iraq. In 1997, China Petroleum and Natural Gas Group Corporation (hereinafter referred to as "China Petroleum"), China Ordnance Industry Group Corporation and Iraqi Petroleum Marketing Company jointly established Oasis Petroleum Co., Ltd., which was responsible for the construction and development of Ahdab Oilfield. This project is the first project of China Petroleum in the Middle East. Affected by many factors, the project was restarted in November 2008 after being stranded for 12 years.

　　Since its inception in 2009, the project team has adopted the world-leading patented technology of harmless treatment of waste mud to treat drilling and workover mud in oil fields, becoming the first oil field project built by an international oil company in Iraq, which integrates the treatment and production of oil, gas, water, electricity, liquefied petroleum gas and sulfur, with the most complicated treatment process and the most complete system. "The project insists on advanced treatment of acid waste gas to produce sulfur with a purity of over 99.99%, which greatly reduces the impact on the environment and benefits more than 1.4 million local people in Iraq, which is of great significance to the green environment construction in the oil region." Gong Changli, project leader, said.

　　From 2009 to the end of 2022, the waste liquid and waste residue produced in the process of drilling and workover of 401 wells have been treated in a centralized and harmless way, and the accumulated investment has exceeded 60 million US dollars, which has created a precedent in the history of drilling and environmental protection in Iraq.

　　In 2018, a Green Action Team was set up in Ahmedabad Oilfield, all of which were composed of Iraqi employees. It was responsible for publicizing the concept of green environmental protection, laws and regulations, safety production and other related knowledge to local people, collecting local people’s opinions and demands on the environment of the oil region, and further achieving the goal of environment-friendly development. At the beginning of February this year, some residents in the oil area reported the situation to the external operation coordination department of the oil field. The villagers were about to carry out channel dredging operations in the cultivated land area, fearing that they would encounter underground pipelines, and took the initiative to seek help from the oil field in advance. "After receiving the reflected situation, we rushed to the scene at the first time. After confirming the location of the underground pipeline, we contacted the ground engineers and technicians in time to guide the operation, and took pipeline protection measures to assist the local villagers to successfully complete the ditch dredging operation and avoid the phenomenon of destroying the underground pipeline." Abid said.

　　"In addition to our daily work, we will also collect white garbage such as plastic bags and mineral water bottles in the oil area and send them to the garbage dumping station for centralized treatment." According to Abid, over the past five years, the Green Action Team has collected more than 360 vehicles of white garbage to keep the clean environment of the oilfield operation area, which has been well received by the local people.

　　At the same time of oilfield development and construction, the project allocates special funds from oilfield operation funds every year as the construction funds of social public welfare projects, and carries out public welfare projects in the fields of medical care, transportation, education, sports, electric power facilities, etc., actively promoting local economic development and helping to improve the living standards of local people.

　　By the end of February this year, the oil field had produced more than 61 million tons of crude oil, and all the oil and gas were exported normally, which created a stable and considerable economic income for Iraq, trained a large number of local young technical talents, created more than 5,000 direct or indirect employment opportunities for the local area, and helped local community residents to obtain sustainable development opportunities and improve their lives from the source, thus building a mutually beneficial and win-win development strategy. During the development and construction period, the project has driven many China engineering technology and construction service teams to enter the Iraqi market, and most of the oilfield equipment comes from China.

　　Mohammad Jamir, governor of Wasit province where the oil field is located, said that the Ahdab oil field project has opened a new journey for Wasit province to become a modern industrial city, and the urban landscape has been greatly improved, with no potholes and dusty roads, and the concept of green development is more deeply rooted in people’s hearts.

　　An article in Iraq’s "Tomorrow Daily" said that China Company contributed a lot to the post-war reconstruction of Iraq. "Iraq needs China, and Iraq and China must continue to strengthen cooperation in various fields, especially in the political and economic fields."

　　Iraq’s Ahdab oil field project. Photo courtesy of China Petroleum Middle East Company

　　Iraq’s Ahdab oil field project. Photo courtesy of China Petroleum Middle East Company

The following article comes from Guangzhou CDC I Health, and the author is Guangzhou CDC I Health.

Guangzhou CDC I Health.

Disease control and health

present

In winter, the temperature is changeable, hot and cold.

Respiratory infectious diseases such as influenza enter the high-risk season.

According to the press conference of the National Health and Wellness Committee, at present, with the continuous winter in various places, respiratory diseases have entered a period of high incidence. Monitoring shows that influenza is the main infectious disease of respiratory tract recently. In addition, there are rhinovirus, mycoplasma pneumoniae, respiratory syncytial virus, adenovirus and so on.

Recent monitoring in Guangzhou shows that acute respiratory infectious diseases mainly caused by influenza and mycoplasma pneumoniae are active, and respiratory infections caused by rhinovirus, adenovirus, respiratory syncytial virus and other common respiratory pathogens are intertwined. In particular, the level of influenza activity has increased significantly. At present, influenza A (H3N2 subtype) and influenza B (Victoria strain) are prevalent at the same time, and influenza is gradually entering the winter epidemic period.

How to judge which pathogen is infected?

Influenza, mycoplasma pneumoniae and respiratory syncytial virus infection

Symptoms such as cough and fever will appear.

How to distinguish?

↓↓↓

one

flu

Influenza is an acute respiratory infectious disease caused by influenza virus. Influenza patients and recessive infected people are the main sources of influenza infection, and the transmission route is mainly droplet transmission, but also through direct or indirect contact with mucous membranes such as mouth, nose and eyes.

The incubation period is 1-4 days, and the acute onset is mainly manifested as fever (high fever can occur in some cases, reaching 39-40℃), cough, sore throat, headache, myalgia and general malaise, and there may be symptoms such as chills, chills, aches and pains in muscles and joints all over the body, fatigue and loss of appetite. Some patients may be accompanied by vomiting, abdominal pain and diarrhea, which are more common in children.

Influenza patients generally have a good prognosis. After 3-4 days of onset, their body temperature gradually subsides and their systemic symptoms improve. However, children, the elderly, people with basic diseases, obese people and pregnant women are prone to develop into severe diseases after infection, so they should be treated promptly.

Vaccination with influenza vaccine can effectively reduce infection, even if it is infected, it can also reduce the incidence, and even if it is infected, it can also reduce the severity of the disease.

Details of Influenza Vaccination → Guangzhou CDC reminds you: Recently, influenza activity has increased, so hurry up with vaccination to protect your body ~ (Click to jump)

2

Mycoplasma pneumoniae

Mycoplasma pneumoniae is the smallest known microorganism that can live independently between bacteria and viruses. It is mainly transmitted by droplets and direct contact, and the population is generally susceptible, especially in children and adolescents over 5 years old. Usually, when the seasons change, for example, when summer turns to autumn or autumn turns to winter, there may be local and short-lived clustering epidemics.

The incubation period is 2-3 weeks, and the main symptoms are similar to those of most respiratory diseases, with fever and cough as the main symptoms. Generally, the cough is severe, and it may last for 1-2 weeks after the fever has gone down. After children are infected with mycoplasma, most of them show upper respiratory tract infection, a small number of them are lower respiratory tract infection (possibly bronchitis or pneumonia), and a small number of them may develop into severe mycoplasma pneumonia.

Generally speaking, after mycoplasma infection, there will be no repeated infection in a short period of time (1-2 months). It should be noted that if the symptoms of infection recur, it is often that the last mycoplasma pneumoniae infection did not heal, and the local lesions were not completely removed and secondary infection occurred.

At present, there is no vaccine to prevent mycoplasma pneumoniae infection. If you have fever accompanied by severe cough, you should see a doctor in time, find out the cause as soon as possible, standardize the treatment, and avoid using drugs blindly.

three

Respiratory syncytial virus

Respiratory syncytial virus is a common and highly contagious RNA virus. Spread through droplets and close contact, or spread through contaminated hands and surfaces.

The incubation period is usually 2-8 days, and detoxification can last for 1-3 weeks. Patients often have upper respiratory symptoms after infection, and the typical symptoms of children infected with syncytial virus are fever, cough, stuffy nose and runny nose. The typical symptoms of adult infection are very similar to the common cold, such as low-grade fever, cough, stuffy nose and runny nose.

Most patients’ symptoms will disappear spontaneously within 1-2 weeks, and a small number can develop into lower respiratory tract infection (i.e. bronchiolitis or pneumonia), which is more common in young infants. Clinical symptoms include cough and wheezing.

At present, there are no syncytial virus vaccines and special therapeutic drugs on the market in China. Syncytial virus can be repeatedly infected and easily spread at home, and infection can be prevented by strengthening personal protection and other measures.

four

Rhinovirus

Rhinovirus is one of the main pathogens causing the common cold. Mainly through direct contact and droplet transmission; Infants, the elderly and immunocompromised people are susceptible to rhinovirus.

The incubation period is 2-5 days, and the clinical manifestations are mainly runny nose, sneezing, throat discomfort, nasal congestion, cough, mild sore throat, low or slightly elevated body temperature, often accompanied by sinusitis and otitis media. Although rhinovirus infection can gain immunity, it lasts for a short time, so people can be infected with rhinovirus repeatedly.

At present, there is no specific prevention and treatment method. The patient’s condition is generally self-limited, with mild symptoms and can be cured in a week or so.

five

adenovirus

Adenovirus is not a new virus, it is a common virus that causes respiratory infection in children, and it is the main cause of community-acquired pneumonia in children. It can spread through droplets, close contact and fecal-oral route, and can also spread through water. Babies over 6 months old, school-age children and immunocompromised people are the high-risk groups of adenovirus infection.

The course of disease is usually 5-7 days, but the symptoms may last for up to 2 weeks, which may be complicated with bacterial infection. Symptoms vary according to the affected parts, and may include: fever, sore throat, runny nose, cough, earache, conjunctivitis (also known as "red eye"), diarrhea and hoarseness.

Adenovirus infection is mostly self-limited and supportive treatment is adopted. Antiviral therapy is usually only used for severe adenovirus disease, and most of these patients have impaired immune function.

At present, there is no adenovirus vaccine in China, and the prevention of adenovirus infection mainly focuses on hygiene, especially hand hygiene.

How to scientifically prevent respiratory diseases in daily life?

1. Wash your hands frequently. Wash your hands with soap or hand sanitizer and flowing water. Cover your mouth and nose with a handkerchief or paper towel when sneezing or coughing to avoid polluting your hands and the surrounding environment.

2. More ventilation. Keep the indoor air circulating, and generally ventilate 2-3 times a day at home in winter for about 30 minutes each time.

3. gather less. During the epidemic of infectious diseases in winter and spring, try not to go to crowded places and avoid contact with patients with respiratory diseases. It is recommended to wear masks when you need to go.

4. Drink plenty of boiled water. Keep the nasal mucosa moist, effectively resist the invasion of viruses, and also facilitate the excretion of toxins in the body and purify the environment in the body.

5. Eat a balanced diet and exercise properly to enhance your physical fitness (outdoor activities should be reduced in foggy days).

6. Vaccinate. Vaccine is an effective means to prevent related infectious diseases. For infectious diseases such as influenza, chickenpox and mumps, susceptible people can be prevented by vaccination in advance.

7. Once infected with infectious diseases in winter and spring, patients should take hospitalization or rest at home according to their illness and doctor’s advice, and avoid participating in group activities and entering public places during this period. Resume daily activities such as going to school and going to work after it is not contagious.

Warm reminder:

In order to meet everyone’s medical needs

Original title: "Recently, acute respiratory infectious diseases mainly caused by influenza and mycoplasma pneumoniae are more active. How to prevent them? 》

Read the original text

　　[car home Information] As of 19:00 on December 26th, (|) has exceeded 10,000 in two hours. At present, the order of M9 is still rising, and the first batch of exhibition cars have arrived in 89 cities nationwide, with a total of 252 stores. At present, M9 can also enjoy the matching rights of 10,000 yuan. Yu Chengdong said that the M9 will be delivered on a large scale from February 26th next year. At present, more than 54,000 new M9 cars have been booked.

　　According to media reports, AITO’s sales target for the whole year of 2024 is 600,000 vehicles. Next year, AITO also plans to release and mass-produce M8 vehicles. Even from the beginning of next year, according to the sales of four vehicles, the average sales volume of each vehicle will reach tens of thousands. This goal can be said to be quite ambitious. In 2026, AITO will achieve the production and sales target of one million vehicles.

　　On the evening of December 26th, the price of the M9 was officially announced, with the price range of 469.8-569.8 million yuan. It was positioned as a large SUV, and two power models were launched: the extended range version (CLTC battery life is 225km) and the pure electric version (CLTC battery life is 630km). Wenjie M9 is built by Huawei’s smart car full-stack technology solution, and has many black technologies such as Turing intelligent chassis, HUAWEI ADS 2.0, super basalt body and HarmonyOS 4 intelligent cockpit.

　　The intelligent lighting system adopted by Wenjie M9 consists of adaptive matrix headlights, intelligent projection headlights, adaptive low beam headlights, skyline position lamp and intelligent interactive matrix headlights. Among them, smart projection headlights can form a 100+ inch giant screen projection to create a personal open-air cinema for users. Intelligent interactive matrix headlights have a variety of personality skins, with rich scene lights, and support functions such as holiday blessing, weather reminder, lane change lighting reminder and path reminder, narrow lane lighting reminder, tunnel lighting brightness enhancement, and safety guidance on both sides of the lane. After cooperating with Huawei’s intelligent driving, it can not only project multiple scenes, but also have many functions of safety reminder during driving.

　　The volume ratio of all-aluminum alloy in the M9 car body reaches 80%, the lightweight coefficient is as low as 2.02, and it has a large steering angle, which is large but not clumsy. The original owl enhanced steering technology does not occupy the back row space and achieves the minimum turning radius of 5.8 meters. With the addition of hidden door handles and low wind resistance wheels, the wind resistance coefficient of the whole vehicle reaches 0.264Cd. At the same time, all four doors are equipped with mechanical handles to improve the efficiency of getting out of trouble in distress. In terms of body size, the length, width and height of the car body M9 are 5230/1999/1800mm and the wheelbase is 3110mm, which is closer to the ideal L9 and BMW X7, but still a little different from Mercedes-Benz GLS.

　　The M9 car is made of high-grade NAPPA leather, suede ceiling, the same color steering wheel, crystal star ring scatterer, wisdom knob and natural white bolt solid wood. There are almost no physical buttons reserved on the center console, and the popular triple screen layout is adopted, and the AR HUD function is integrated. Officially, the M9 is called "the car king of science and technology" and "the leading generation of science and technology", so it is very worthwhile to talk about the specific black technologies of the M9.

　　Wenjie M9 is equipped with the leading generation of Teana Space, and the HUAWEI SOUND SUPERIOR Excellence Series is on the train for the first time. It has the flagship hardware configuration, equipped with 25 units of professional-grade audio, and the power amplifier output reaches 2080W W. The high-fidelity sound quality is comparable to the top international recording studio. The ring scatterer tweeter integrates light and shadow aesthetics, acoustic technology and AI wisdom, which makes the audio-visual effect more shocking. At the same time, the flagship hardware is matched with Huawei’s leading technology and algorithm, which brings many unique functions in the industry, such as extrasensory spatial sound and smart dessert, so that the sound can be heard from now on.

　　HarmonyOS 4.0 intelligent cockpit adopted by M9 in the world, the main highlights are sound source localization in six-tone area, concurrent control in multi-person multi-screen multi-tone area, eye position tracking and eye state recognition in the cabin, multi-screen multi-channel bidirectional circulation and multi-screen cross-device projection. The device raised in the center above the triple screen is the AI intelligent body "star ring scatterer" of light and shadow acoustics, in which the HUAWEI SOUND sound system is integrated. The front row of Nakajima is also equipped with dual wireless charging panels, and the main driver’s side exterior rearview mirror integrates NFC contactless unlocking module.

　　Huawei’s head-up display system is the first time to get on the bus, with the highest 2K resolution, the highest brightness and the imaging area of 75 inches in the industry. The fusion display of AR real scene and ADS brings a more intuitive, safer and more immersive navigation experience, reversing images and parking to watch movies. Look up and show. In other words, the windshield of the M9 is a huge "screen".

　　The M9 is also equipped with the industry’s first car-gauge projection system in the car. Through the laser projector above the third row and the oversized projection curtain above the second row of seats, the cinema viewing experience can be realized. Through the brightest and widest color gamut car-class projector and the 32-inch lifting projection curtain, it supports one-button viewing mode, Huawei’s remote control, perfectly recreating the cinema viewing experience, Rhine eye protection comfort certification and Swiss SGS anti-dizzy certification gold standard, which will not cause motion sickness and eye injury for a long time.

　　Wenjie M9 adopts a brand-new integrated universal triple screen design, and the proper layout of 12.3-inch LCD instrument panel, 15.6-inch intelligent central control large screen and 16-inch passenger entertainment screen, together with the brand-new HarmonyOS 4 intelligent cockpit, can easily realize entertainment experiences such as seamless flow between multiple screens and watching the whole car at the same time through three-finger sliding. At the same time, there are HUAWEI MagLink excuses behind the first two rows of seats, which can expand the equipment in the back row through the magnetic bracket and realize multi-screen linkage interaction based on the HarmonyOS cockpit. The whole car is equipped with 10 screens to create a new benchmark for space intelligence.

　　In terms of seat layout, the official said that the M9 is equipped with a leading generation of ever-changing space, and the 3/4/5/6 seat mode can be changed at will. In other words, the six-seat layout of the boundary M9 has higher flexibility. The co-pilot is innovatively equipped with Shu Yun’s dual-seat, and uses Huawei’s original patented technology of seat separation, which can be folded and stretched, and the dual-seat mode can be changed with one button; The queen’s co-pilot is free to stretch, with 14-way electric adjustment, 8-point massage and seat memory, electric leg rest, foot rest, ventilation and heating. The second row adopts a brand-new zero-gravity seat. Based on the functions of heating, ventilation, massage and 14 electric adjustments, the industry pioneered the horizontal adaptive double armrest function to meet the needs of human body to relax. Unprecedented presidential space, redefining comfort standards.

　　In terms of power, the M9 will provide two sets of power systems, the extended range version and the pure electric version, and both adopt the layout of front and rear double motors. Among them, the maximum power of the front motor and the maximum power of the rear motor of the pure electric version is 160kW and 230kW, and it is equipped with a ternary lithium battery with a capacity of 97.682kWh provided by Contemporary Amperex Technology Co., Limited, and its pure electric cruising range is 630km under CLTC conditions.

　　The extended range version uses H15RT 1.5T engine, with a thermal efficiency of 41% and a maximum power of 112kW. It is matched with double motors, and the maximum power is 165kW and 200kW respectively. The battery is a ternary lithium battery from Contemporary Amperex Technology Co., Limited. The 52-degree battery version CLTC has a comprehensive battery life of 1402km and a pure battery life of 275km；. The 42-degree battery version CLTC has a comprehensive battery life of 1362km and a pure battery life of 225km. (Note, the two extended range models listed this time are 42-degree battery versions, and CLTC has a pure battery life of 225km. The 52-degree battery version is optional, and the optional price is 20,000 yuan)

　　Wenjie M9 adopts Huawei Turing intelligent chassis architecture, adopts high-performance all-aluminum alloy chassis and integrated aluminum alloy die-casting frame, with the front four-ball long double wishbone and rear multi-link independent suspension. The whole system comes standard with intelligent closed air suspension and CDC variable damping shock absorber. The height of the fifth-gear body is adjustable, and the adjustment speed is increased by 30%, so as to ensure the stability of the body at all times, giving consideration to comfort and handling. Turing chassis also controls the journey with wisdom through HUAWEI ADS intelligent road perception, iVSE intelligent vehicle state perception, new HUAWEI DATS dynamic adaptive torque system and HUAWEI xMotion intelligent body collaborative control system, with four technologies of all-dimensional perception and 3D control intelligent collaboration. When cornering, accelerating and braking quickly, the suspension controller will predict the driver’s intention, increase the damping to harden the chassis, restrain the body roll and pitch, and maintain the handling stability. In addition, the dynamic torque adaptive system will also improve the road slip, adjust the torque adaptively and improve the dynamic safety.

　　The M9 goes further in active safety, and the whole vehicle is equipped with 27 sensors, among which the newly designed 192-line laser radar has stronger accurate detection and quick response capability. The longest detectable distance is 250 meters, the spot frequency reaches the highest point/second in the industry, and the scanning frequency reaches 20Hz, which is far higher than the industry average. With the leading GOD general obstacle detection network and RCR road topology inference network, a high-order intelligent driving experience can be realized by the end of 2023. HUAWEI ADS 2.0 has achieved the strongest AEB in history. Facing stationary vehicles and pedestrians, the automatic braking speed can reach up to 120 km/h.. The ESA emergency steering assist (Q2 OTA upgrade in 2024) was launched, and the steering assist driver was automatically controlled to avoid collision. If the backward active safety capability is enhanced, the accelerator will be braked by mistake (Q1 OTA upgrade in 2024). (source: late Auto；; Compile/car home Qin Chao)

　 [Autohome car purchase manual] On February 27th, (|) was officially launched, positioning the medium-sized SUV, the new car guide price is 13.58-17 5,800 yuan, and a total of six models were launched. But unlike Haval Big Dog, the second-generation Big Dog provides two PHEV models, equipped with a gasoline-electric hybrid system composed of 1.5T + 2-speed DHT, and the official said that the comprehensive cruising range can exceed 1000 kilometers. Which of these models is the most suitable for purchase? Is the optional configuration and service worth it? Let’s take a look today.

A Brief Introduction to the Second Generation of Haval Big Dog

　 Haval’s second-generation big dog is relatively burly, and the new car is positioned as a medium-sized SUV. In terms of size, the length, width and height of Haval’s second-generation big dog are 4705/1908/1780mm respectively, and the wheelbase is 2810mm. Internal and external color manufacturers provide a variety of styles for you to choose from. There are five types of appearance colors, and all models can be selected, namely Greyhound, White Dog, Black Dog, Brown Dog, Orange Dog.Among these colors, individuals recommend brightly colored orange dogs, which are more in line with the tonality of the product and are very wild.

　 In terms of interior, the Chaoye version and the 50km Chaodian version only provide black interior, and all other Plus models can choose black, gray dumpling and black-brown interior.If you buy a PLUS model, the gray dumpling color is the most worth buying, which looks more upscale and luxurious.It is worth mentioning that there is no charge for exterior and interior color options

specific configuration analysis

　 Here comes the point!According to the difference in power, we are divided into two parts today to analyze for you, starting with the four gasoline models, followed by the PHEV version. After the configuration analysis, I found that the configuration of the four gasoline models of Haval’s second-generation big dog is very clear. You don’t need to look horizontally at it at all, let’s just chat vertically.In simple terms, all models with PLUS in the model name are: 1.5T Chaono Plus, 2.0T Chaono Plus, and 2.0T 4WD Chaono Plus. In addition to their different power forms, drive forms, and driving modes, all the configurations inside and outside the three cars are the same. Similarly, for models without Plus in the model name, the 2.0T Chaono version is actually the one with the lowest configuration. Let’s divide it into two parts for analysis.

Gasoline regular version: 2.0T Chaono version

　 Go ahead.Conclusion: Not recommended.The main reason is that it is much different from the 1.5T Chaono Plus in terms of configuration. At this level, the most important thing is cost performance. If I were to choose between a 2.0T + 9DCT powertrain, a low configuration, an expensive 2000 yuan and a 1.5T + 7DCT powertrain, a more comprehensive configuration, and a cheaper 2000 yuan, I would choose the latter.

　 In general, although the 2.0T Chaono version is the lowest matching model in terms of the actual internal and external configuration of the car, the complete degree of configuration is completely not inferior to the middle version of many models of the same level. In the power part, the 2.0T Chaono version is the same as the 2.0T Chaono version Plus and 2.0T four-wheel drive Chaono Plus, but the other two cars are more comprehensive in configuration. In addition to adding more configurations, the four-wheel drive system is also added.

Gasoline Plus Edition: 1.5T Tsuno Edition Plus, 2.0T Tsuno Edition Plus, 2.0T 4WD Tsuno Edition Plus

　 Let’s talk about the conclusion first: The most recommended purchase for all models is the 1.5T Chaono Edition Plus.First of all, it "entry is the top", whether it is 105km tide electric version Plus or 2.0T four-wheel drive tide wild Plus car has all the configurations, coupled with its very affordable price, only 135,800 yuan. Whether it is compared with the 105km tide electric version Plus priced at 175,800 yuan or the 2.0T four-wheel drive tide wild Plus priced at 156,800 yuan, its cost performance is still the highest.

　 The 1.5T + 7DCT version has actually been used for a long time on Haval Big Dog, and the owner’s reputation is also good, although the fuel consumption of this power system is slightly higher on the big dog. But on the second-generation big dog, compared with the more expensive or even more expensive 2.0T model and the more expensive hybrid model with tens of thousands of yuan, I think these are acceptable. After all, configuration, space and cost performance are what buyers of this level of model want most.

　 In the past, many car companies liked to lower the configuration of the lowest-equipped models, which was almost miserable, but in the past two years, many manufacturers have stopped doing this, and this time Haval is the same. The lowest-equipped models of the second-generation big dog are very high, achieving "entry-level top matching", you heard right! In addition to the differences in the power system and drive form, the lowest 1.5T Chaono Plus and 2.0T Chaono Plus, 2.0T four-wheel drive Chaono Plus and 105km Chaono Plus are completely the same, like electronic parking, 19-inch wheels, adaptive cruise, a full set of intelligent driver assistance systems, panoramic sunroof, induction trunk, keyless entry/start, and other configurations have appeared. Compared with the ordinary version of the model mentioned earlier, the Plus model has a lot more in terms of internal and external configuration.

　 Okay, the gasoline version has been analyzed. Here are the two versions of the PHEV. Although the name is very close to the gasoline version, there are still some differences in the configuration between the ordinary PHEV version and the Plus PHEV version. Let’s take a look.

Welcome to the Autohome Luzhou promotion channel, we bring you the latest car market trends. At present, the most talked about models are going through an unprecedented promotion. In the beautiful city of Luzhou, car buyers can enjoy a cash profit of up to 40,100 yuan, which further reduces the starting price of the already competitive Blue Electric E5 model to only 99,800 yuan. This is a car purchase opportunity not to be missed. Friends who want to seize this wave of discounts, please be sure to click the "Check Car Price" button in the quotation form to get more specific discount details and the best time to buy a car.

The Blue Electric E5 stands out among its peers with its exquisite body size, with a length of 4760mm, a width of 1865mm, a height of 1710mm, and a wheelbase of 2785mm, providing passengers with a spacious and comfortable interior space. Its front and rear wheelbases are 1585mm and 1580mm respectively, ensuring the stability and handling of the vehicle. It is worth mentioning that the Blue Electric E5 adopts uniform specifications of tires, and the front and rear wheels are equipped with 225/55 R18 tires. With a unique rim design, it not only enhances the visual effect, but also enhances the comfort and safety of driving.

In terms of interior, the Blue Electric E5 shows the perfect fusion of elegance and technology. The exquisite leather steering wheel not only provides a comfortable grip, but also supports manual up and down adjustment, which is convenient for the driver to adjust according to needs. The center console is equipped with a 12.3-inch high definition touch screen, whether it is a multimedia system, navigation or phone operation, it can be easily realized, and supports automatic speech recognition control, which greatly improves the driving convenience. The seat is made of imitation leather material, and the design focuses on comfort. The main driver’s seat has multi-directional adjustment functions of front and rear, backrest and height. The passenger seat also provides a variety of adjustment options to ensure the most comfortable riding experience for passengers. The rear seat supports backrest adjustment and has a proportional reclining function, which improves the flexibility of the space. The overall interior design is centered on practicality and humanization, creating a warm and technological interior environment.

The Blue Electric E5 is equipped with a 1.5L displacement L4 engine with a maximum power of 81 kilowatts, providing continuous power support for the vehicle. This engine has a strength of 110 horsepower, ensuring a smooth driving experience. With the E-CVT continuously variable transmission, power transmission is smoother and fuel economy is improved.

Summarizing the owner’s evaluation, he was full of praise for the driving experience of the Blue Electric E5. The gasoline-electric hybrid system and excellent suspension adjustment brought him more driving pleasure than expected. At the same time, his satisfaction with the interior space also reflects the practicality and comfort of this model. The domineering and safety of the exterior design also makes him deeply trusted. Among many new energy models, the Blue Electric E5 undoubtedly satisfies his dual pursuit of driving pleasure and quality of life.

　　At the beginning of the Year of the Rooster, it is a happy day for people to get together and visit relatives and friends. Do you still remember that in order to explore the mysteries of the universe, in the past year, there were many more "China Stars" in the sky above us. On the occasion of the Spring Festival, China Science News/Science Network recorded the busyness of researchers around "China Star" from the perspective of first-person personification, and at the same time offered warm greetings from afar.
　　Eye FAST: I’m doing a physical examination during the Spring Festival.

　　Happy New Year, everyone. I am a 500-meter spherical radio telescope. My English name is FAST, and Jianghu people call it "Eye of the Sky".
　　At the beginning of the new year, the flavor of the year is really strong. Everyone should be reunited with their families. I ushered in the Year of the Rooster with my fellow scientists this year. However, in the past few days of the Spring Festival, we have not been idle.
　　Last September 25th was my birthday. With everyone’s attention and encouragement, I made my first panoramic appearance in my life, perfect!
　　However, although I have been built, the scientist friend said that my performance index still needs to be debugged and optimized.
　　During the big holidays, these scientists left their families to accompany me and give me a "physical examination" to protect my health and safety. I really want to thank them for their dedication to me. Now, I am sitting in the cave of Guizhou, looking up at the universe and enjoying myself.
　　过去的一年里，我还要特别感谢大家对我的关心。今年，习总书记的新年贺词专门点了我的名，让我多少有些受宠若惊，未来，我还会继续努力，为人类解开更多宇宙谜题。
　　说到宇宙谜题，我不得不说宇宙真大啊，奥秘真多啊！虽然我不能预言未来一定会发现哪些惊天动地的大成果，但是，我承诺将穷千万里之目，在宇宙边缘寻找中性氢，为人类重现宇宙早期图像；我将用一年时间，探索千颗脉冲星，建立脉冲星计时阵，并参与未来脉冲星自主导航和引力波观测。
　　此外，我还将主导国际甚长基线干涉测量网，获得天体超精细结构；进行高分辨率微波巡视，检测微弱空间信号；参与地外文明搜寻；参与子午链工程，提高非相干散射雷达双机系统性能；将深空通讯能力延伸至太阳系外缘行星，将卫星数据接收能力提高100倍。
　　我会努力的！（记者倪思洁采写）
　　悟空：鸡年继续“猴犀利”

　　丢丢丢……噔噔噔噔……噔噔噔噔……俺老孙来也！
　　大家过年好！一直忙着找暗物质，春晚也没顾上看，但还是一定要给大家拜个年！祝你们鸡年吉祥！祝师父们和我鸡年继续“猴犀利”，早日揭开暗物质的神秘面纱！
　　Many people ask me where I have flown, but in fact I have been circling the earth. This job is not as cool as you think, it won’t fly into the distant deep space of the universe, and repeating the work every day is to circle-collect information-circle-collect information …
　　Yes, scientific research is so monotonous. In the vast space, a lonely idealistic monkey cries "high energy ahead" every day, and uses its eyes to identify the traces of dark matter.
　　You must be curious about how I work in space. Simply put, I indirectly look for and study dark matter particles by detecting the direction, energy and charge of high-energy particles in the universe. I have a lot of amazing skills that only China has.
　　I have been walking for 409 days on the way to learn from the scriptures, and I miss you so much! But I can’t cry, I want to keep the sensitivity of all loads … The masters said that I will work for at least 3 years, and if I am in good condition, I will work for 5 years or longer. It’s a bit like going to a space university and receiving a lot of information for analysis every day. If you send a paper, I will let you know as soon as possible.
　　I receive 16G of information from the universe every day, which is almost equivalent to three or four high-definition movies. Over the past year, I have covered the whole sky and detected 1.9 billion high-energy particles. The masters praised me for my ability and said that my performance exceeded expectations.
　　There are still so many puzzles waiting for me in the universe. Well, I’ll get the scriptures back.
　　I know you all have a lot of questions about me and dark matter. Throw the question high into the air. I’m in 500 km low earth orbit and I’ll catch it. The first batch of scientific achievements will be released soon, and then the masters and I will answer them one by one. (Reporter Lu Qicai wrote)
　　"Space Bee": Come and see BIGBANG.

　　Hello, everyone, I am "the most beautiful little bee in space"-the "gamma-ray polarization detector" that went into space with Tiangong-2 Space Laboratory. My big name is Tianji, and my English name is POLAR.
　　My "little bee" is not a hollow reputation. From the day Tiangong-2 was successfully put into orbit and the detector was turned on, I can be called a "model worker"-I kept an eye on the gamma-ray bursts in space 24 hours a day, and I didn’t dare to stop for a moment.
　　As a dedicated "little bee", through my efforts, scientists have achieved fruitful results. Up to now, scientists have detected gamma-ray bursts, solar flares and pulsars from the data I provided, and have successfully conducted preliminary pulsar navigation experiments using pulsar signals. The results of my work have far exceeded the tasks assigned to me before going out to war.
　　However, I still have great potential to be developed. Up to now, scientists have not completed the comprehensive test of my performance and the calibration of instruments, such as the calibration of instruments for measuring the detection efficiency of 1600 channels. Scientists have placed a lot of expectations on me. I think besides these "initial dreams", I should be able to bring you more surprises.
　　While I don’t give up working day and night, my fellow scientists who are struggling with me are also very hard. Many people stick to their posts during the Spring Festival. Fortunately, with the developed Internet, they no longer have to stay in the laboratory and suffer from homesickness, but can stay with their families, access the server of the experimental team through the Internet, and monitor and analyze the data provided by me in time. Not only that, the friends on duty will keep in close contact with the whole team through WeChat group and always pay attention to my dynamics. (Written by reporter Wang Jiawen)
　　Mozi: China Star’s China Heart

　　Hello everyone! I am "Mozi", and at this festive moment to bid farewell to the old year and welcome the new year, I wish to pay a New Year call to my fellow villagers all over the country!
　　Hey, didn’t you say Mozi was the philosopher 2400 years ago? Haha, I was named after him. Mozi once wrote: "the end and the body are out of order, but the former is also the most." The "end" he said is the smallest particle of matter, which has a wonderful fate with the concept of "quantum".
　　Yes, I am a quantum satellite. I flew into space on the Long March II carrier rocket last August. I am not big, but I shoulder a very important mission: to realize quantum communication between satellites and the ground for the first time in the world, and to build a quantum secure communication and scientific experiment system integrating heaven and earth. On January 18th, I just finished the four-month on-orbit test, officially put it into use, and started three major scientific experiment tasks. At present, data is being collected.
　　I am a "China Star", which was independently developed by China scientists. I have a "China heart" and sincerely hope that my motherland will stand on the top of global innovation; I also loved the "China Festival". Although I am in the distant space, I am still concerned about the lights at the beginning of the New Year!
　　But don’t worry, I’m not alone. On the ground, I have five good friends-Xinglong Station in Hebei, Nanshan Station Station in Xinjiang, Lijiang Station in Yunnan, Delingha Station in Qinghai and Ali Station in Tibet. As long as it takes 90 minutes, I can circle the earth and "shake hands" with various ground stations through beacon light. The ground station emits red beacon light full of joy, and I report it with vibrant green beacon light. After shaking hands successfully, I can emit single photons and complete the corresponding quantum communication experiment. Every time I cross the border from a ground station, I have a quick glance at it in the early morning, but it takes only five minutes. The staff who are watching me will stay up late into the night and race against time to finish the experiment. You have worked hard!
　　At the Chinese New Year Friendship Association of the scientific research team, talented scientists wrote and sang a song for me-"South Mountain South-Quantum Star". I was deeply moved by the lyrics: "He said that the beauty of the laser across the night sky was not as good as the first time he met you. Time is fleeting, and every second counts. If all the ground stations are connected, sweeping the night sky just to hug you. Get through the night, good night. " (Reporter Li Chenyang wrote)
　　"Jade Rabbit": I go to work on the tenth day of the Lunar New Year.

　　Hello, everyone, I am the "Yutu" on vacation, and I wish the people of the whole country a happy Spring Festival first!
　　Wait, don’t give me a bad review yet. I know that state officials on duty can’t take vacations. But my sister Chang ‘e and I are both powered by solar cells. During the Spring Festival, the moon is just in the moonlit period, and we can’t see the sun, so we hibernate like animals.
　　This is the fourth Spring Festival I have spent on the moon. At first, scientists didn’t expect me to live so long. They only designed a life span of three months for me. I finally stopped working on July 31 last year after experiencing abnormal control of the mechanism and many times of dormancy and awakening.
　　Of course, the scientists have been very satisfied with my performance and praised me for overfulfilling my task, paving the way for manned landing on the moon in the future. I am very proud of the original achievements made by scientists with the help of my sister Chang ‘e and me, such as establishing the data processing method of optical camera detection and terrain reconstruction model, determining the geological age of lunar geological units and discovering new rock types.
　　Now, the only "organ" that I can still work with Sister Chang ‘e is the moon-based optical telescope. This instrument has carried out nearly 5000 hours of sky survey observation and obtained more than 200,000 image data. Quietly tell everyone that the starry sky seen on the moon is definitely different from that on the earth. I hope you can come here and feel it for yourself!
　　In 2015, scientists used the moon-based optical telescope to observe a special binary star named "V921 Her" and found the light curve of the overlapping binary star system. At the same time, scientists also put forward the upper limit of hydroxyl (water) density in the lunar exosphere according to the data, which is the best result in this field so far.
　　The next day will come on the tenth day of the Lunar New Year. You can rest assured that we will be awakened by the intelligent system to start work on time at that time! Goodbye! (Reporter Gan Xiao wrote)
　　Carbon satellite: I’m a small space carbon detector.

　　Hello everyone! I am Yan Ru Song Yu, looks better than Pan An, and Cai Sai Conan. People in Jianghu call China’s first global carbon dioxide monitoring scientific experimental satellite-carbon satellite. I wish you a happy New Year in the 700-kilometer sun synchronous orbit. I wish you all a good year of rooster and become as awesome as me in the new year. Hahahahaha!
　　Today is the fifth day of the first month, commonly known as "breaking the fifth day". People get up at dawn and clean up, which means to drive out all the "dirty" things. This is similar to my task. After the industrial revolution, the greenhouse gas emissions produced by a large number of fossil fuels showed explosive growth, which made the earth on which we depend face increasingly serious greenhouse effect.
　　People in China pay attention to keeping accounts first. Scientists especially want to know how much carbon dioxide is, what is the "breakdown" of emissions in different regions, and what is the impact of greenhouse gases on climate change, so they sent me to space.
　　Although I have only been in heaven for more than a month, I can’t compare with the previous "brothers and sisters", but I will try my best to give China people a long face with my high-precision "critical eyes" and my graceful "dancing". No, I just did a great thing years ago. I obtained the first set of high-resolution spectrograms of atmospheric oxygen and carbon dioxide absorption from space, which provided scientists with the first batch of observation data.
　　Gnome male-",this first battle seems to be quite beautiful. Even the precious scientist Shu praised me: "The quality of the first batch of satellite payload data is good, and the satellite runs stably. The carbon satellite successfully obtained the first batch of data, which laid a solid foundation for scientists to carry out high-precision calibration and high-precision inversion of atmospheric carbon dioxide. "
　　Anyway, the scientists are not resting on duty, so I have to go back to my post. You keep shopping ~ eating ~ shopping ~ eating, and I will quietly see how much carbon dioxide you can discharge … (Reporter Ding Jia wrote)
　　(Originally published in the first edition of China Science Journal on February 6, 2017)

　　Attachment: Research and development of high-performance computing machines in our country

　　Our country’s high-performance computing machines have formed three series, namely Galaxy series, Dawning series and Shenwei series.

　　Galaxy series

　　In November 1983, our country’s first gigantic electronic computer named "Galaxy" was born at the National University of Defense Technology after five years. Its successful development announced to the world that China has become a country that can independently design and manufacture supercomputers after the United States, Japan and other countries.

　　On November 19, 1992, the 1 billion supercomputer "Galaxy-II" developed by the National University of Defense Technology passed the national appraisal in Changsha, filling the gap of parallel supercomputers for large-scale scientific engineering computing and large-scale data processing in our country.

　　On June 19, 1997, the "Galaxy-III" parallel supercomputer developed by the National University of Defense Technology passed the national appraisal in Beijing. The machine adopts a distributed shared storage structure for large-scale scientific and engineering computing and large-scale data processing. The basic word length is 64 bits, and the peak performance is 13 billion times. The machine has a number of technologies that are leading in China, and the comprehensive technology has reached the current international advanced level.

　　Dawn series

　　Dawning I In October 1993, Dawning successfully launched the first SMP structure computer – "Dawning I". It can be widely used in banking, insurance, accounting, taxation, post and telecommunications, transportation and government departments for large-scale transaction processing. Dawning I is a major achievement of our country’s "863 plan", which marks that our country has mastered the world’s advanced level of designing and manufacturing symmetrical tightly coupled parallel machines that support multi-threading mechanisms, and shortens the gap between our country and foreign countries in parallel processing technology.

　　Dawning 1000 was developed in May 1995. It is the first set of large-scale parallel computer system independently developed in China, and its peak computing speed reaches 2.50 billion times per second. It used Mesh network for the first time and developed Wormhole routing chip for the first time. It is the first company to develop advanced parallel operating systems based on message passing, practical parallel optimization compilers and parallel file systems. All use parallel programming, debugging tools and environments, and the whole has reached the international advanced level in the early 1990s. Some technologies such as cavity communication chip design and parallel optimization compilation have reached the international leading level.

　　Dawning 2000-I Super Server, a major project of the National 863 Program undertaken by the National Intelligent Computer Research and Development Center in the first half of 1998, was successfully developed and passed the national appraisal. Its peak computing speed is 20 billion floating-point operations per second, supports mainstream operating systems and parallel programming environments, and has the characteristics of a single image. It is oriented towards scientific engineering computing. Although this project is a high-end product, it has upward and downward scalability, so it is expected to develop into a high-performance computer product series. Dawning 2000-I meets part of the domestic demand for MPP systems, which in turn promotes the development of large-scale scientific engineering computers and large-scale transaction processing in our country.

　　Shuguang 2000-ⅱ Super Server, developed by the National Intelligent Machine Research and Development Center of the Chinese Academy of Sciences, has passed the expert appraisal organized by the Ministry of Science and Technology in Beijing. It has made a major breakthrough in the key technology and productization of super servers, reaching the advanced level of international congeneric products in the late 1990s, and has entered the international leading ranks in cluster operating systems. Its peak floating-point operation speed is 110 billion times per second, the total memory capacity reaches 50 gigabytes, which can be expanded to 80 gigabytes, and the total disk capacity exceeds 600 gigabytes, which can be expanded to several gigabytes. It has an advanced cluster architecture, consisting of 82 node computers, and the total number of processors reaches 164. Dawning 2000-II has a rich and complete software system. Our country has developed a powerful cluster operating system, equipped with a variety of popular high-level programming languages, mainstream parallel programming environments and tools. In order to support network information services, the machine is equipped with parallel network and email service software, and can support various popular database software. working processor. In addition, it must also have self-checking and repair functions, which will be a revolution in the field of computer design.

　　Shenwei ⅰ computer system

　　In August 2000, our country’s self-developed high-performance computing machine, Shenwei I, with a peak computing speed of 384 billion floating-point results per second, was put into business operations. After the United States and Japan, our country has become the third country with the ability to develop high-performance computing machines. The system ranks 48th among the top 500 high-performance computing machines in commercial operation in the world today.

　　This scalable large-scale parallel computing system named Shenwei ⅰ computer system, the main technical indicators and performance have reached the international advanced level, is our country’s major scientific research achievements in the development and application field of giant computers, thus breaking the restrictions of some Western countries in the field of high-performance computing machines to our country.

　　The application scope of Shenwei ⅰ computer system mainly involves meteorological and climate, aerospace, information security, oil exploration, life sciences and other fields. During the practice run, Beijing high-performance computing application center has successfully developed a number of practical large-scale application software based on Shenwei ⅰ computer system. Preliminary statistics show that the utilization rate of Shenwei ⅰ computer system has reached more than 60%, and it is playing an active role in the field of national economic construction. For example: the ensemble numerical weather forecast system developed in cooperation with our country’s meteorological bureau can complete 32 samples and 10-day global forecasts within 8 hours; the human gene cloning system developed in cooperation with the Institute of Biophysics of the Chinese Academy of Sciences has completed the cloning operation of human heart genes and achieved the results of reaching the international advanced level.

　　According to reports, the first Shenwei I was put into use at the Beijing high-performance computing application center, and the second will be put into operation at the Shanghai Supercomputer Center.

　　(People’s Daily Online Profile)

Editor in charge: Li Erqing

By the end of 2022, NIO had a total of 26,763 employees. On November 3, NIO Chairperson and CEO Li Bin said in a letter to all NIO employees that about 10% of positions would be reduced, meaning that about 2,700 people would be laid off.

On August 29, 2023, NIO announced the second quarter financial report. The financial report shows that the revenue decreased by 14.8% year-on-year to 8.7717 billion yuan, the gross profit decreased by 93.5% year-on-year to 87 million yuan, the net loss 6.0558 billion yuan increased by 119.6% year-on-year, and the adjusted net loss was 5.4457 billion yuan, an increase of 140.2% year-on-year. (Normally, NIO will release the third quarter financial report of 2023 around November 9, but as of the date of publication, it has not been seen for a long time, and the estimated data is not optimistic.)

As of October this year, NIO’s total sales were 126,067 vehicles, ahead of XPeng Motors’ 101,445 vehicles, but far below Li Auto’s 284,647 vehicles.

The level of sales is the bedrock of a car company’s economy, and a series of data suggest that NIO’s life in 2023 will indeed be difficult.

Although NIO’s sales and profits are average, it is also quietly doing big things.

As of November 1, NIO has built 2,079 power stations and 19,579 charging piles around the world, including more than 2,000 power stations in China and more than 600 high-speed stations. At the same time, NIO’s overseas and domestic stores are also increasing, with 25 new stores added in October.

The layout of NIO’s charging and swapping network and stores has undoubtedly improved the car experience of NIO owners and expanded the influence of NIO, but many people believe that the construction and operation costs of NIO swapping stations are too high, and the global rollout takes up a lot of money.

If the cost of a power station 3 million (including land, personnel, battery loss, etc.), the NIO 2000 power stations need at least 6 billion to support. More importantly, NIO power stations only serve NIO owners, and NIO promises to owners that there will be free power changes every year, so the profitability of NIO power stations is about equal to none compared with 6 billion.

In addition, with the rapid development of overcharging technology and battery technology, the charging time has been greatly shortened, the battery life of pure electric vehicles has also been greatly improved, and the advantage of fast power station replacement has been gradually weakened.

Writing here, the author wants to apologize for the NIO power station replacement.

The author has personally experienced the second and third generation of NIO power station, and the average power change time is only 3-5 minutes. No matter how fast the overcharge speed is, it is impossible for them to fully charge a 75KW/h and 100KW/h battery within 3 minutes at this stage, and the charging time will even be extended due to the instability of the charging pile voltage. If there is no revolutionary breakthrough in power battery technology, the charging speed of the power station cannot be shaken.

The power station takes up most of NIO’s resources, but it also brings a lot of convenience to users, and at this stage, the power station and the overcharge complement each other, and it is far from the day when the winner will be decided.

NIO’s predicament today is mainly caused by high prices and low sales.

At present, NIO’s product system has covered many aspects such as cars, SUVs, coupe SUVs, station wagons, etc. It is the car company with the most models and the widest layout among the three car companies of "Wei Xiaoli". Friends who are familiar with NIO know that the price of its models is generally high. If it were not for the price reduction of NIO ES6 and NIO ET5 and ET5T, NIO’s cars would not be lower than 300,000 at all, especially NIO ES8 high-end models. Correction is approaching 600,000.

The advantage of many models and high prices is that it has cut into a more subdivided market, stabilized NIO’s high-end brand perception, but also entered the sphere of influence of traditional luxury brands and emerging brands such as Tesla.

NIO ET5 and ET5T priced at 29.8-356,000 yuan have no advantage over Tesla Model 3 and BMW 3 Series in price, and belong to the level of half a catty to eight taels in control and comfort. The biggest advantage is that ET5T has design advantages in order to stabilize the monthly average of 5000 vehicles (ET5 and ET5T), which can be compared with BMW 3 Series and Tesla Model 3 with an average of 1-20,000 units.

In fact, NIO has tasted the sweetness brought by the price reduction, in June NIO all models down 30,000 yuan, although the cancellation of free power exchange and other parts of the rights and interests, but NIO new ES6, ET5T, ET5, ES8 and other models sales or a significant increase, its July sales is the first time in the year to break through the 20,000, especially the new ES6 of 11118 vehicles, become the absolute main force of NIO.

At this stage, many car companies are deliberately setting the price of new cars for sales, such as Zhiji LS6, Xiaopeng G6, Xiaopeng G9, etc., and the effect is quite positive. Xiaopeng G6’s October sales are 8,741 units, Xiaopeng G9 is listed for 15 days, and Zhiji LS6 is 28,000 units.

Now NIO really don’t have to hold it for high-end brand perception. It is the most practical to cancel part of the rights and interests to give consumers real money discounts in order to sell sales. What about the future of NIO? Layoffs and losses are just a small episode in its growth process. Even if Li Jiebin picks it up, with the scale of NIO charging stations and stores, as well as the annual sales of 150,000 vehicles, capital and major car companies will not give up easily. (Text/Youshi Auto, forward)

Note: The pictures are from the Internet, and the rights belong to the original author. Thank you together! This article only represents the author’s personal opinion and does not represent the position of Youshi Auto.

　　On January 8th, the Avita 11 Hongmeng Edition Smart Enjoy upgrade was officially launched, with a total of 4 models priced at 30-390,000 yuan. The Avita 11 Hongmeng Edition Smart Enjoy upgrade has been upgraded in terms of intelligent driving and configuration, bringing consumers a better intelligent travel experience.

　　The Avita 11 Hongmeng Edition Smart Enjoy upgrade continues the previous styling design, featuring a sports kit including 22-inch wheels and yellow Brembo all-aluminum four-piston calipers. The new model comes standard with NAPPA leather seats and leather steering wheel, and is upgraded to 256-color ambient lights (OTA upgrade for old owners), with a maximum battery life of 730km, and an 800V high-voltage electrical platform. Huawei DriveONE high-voltage motor can achieve 0-100km/h acceleration of 3.98 seconds.

　　The core of the upgrade of the new car in terms of intelligent driving is that it no longer relies on high-precision maps and can be driven across the country. In the future, map-free intelligent driving will be pushed. After no longer relying on high-precision maps, the number of cities covered by the intelligent driving system will increase in geometric levels, which is more convenient to use. At the same time, the system can learn by itself and continuously optimize the algorithm to make up for the problem of road construction and road closure environment changes. In addition, it can be used even without the network, as long as the user selects the destination and does it with one click. Integrate the GOD network to build road information in real time, integrate real-time information of road conditions, and select road sections with higher traffic efficiency according to road

　　The second is the upgrade of the chassis. The Huawei iTRACK dynamic torque distribution system is introduced, which uses microsecond-level ultra-fine real-time road condition sensing technology to scan the road environment. When encountering complex road conditions such as speed bumps and low-attachment roads, millisecond-level torque fine-tuning can be realized to improve the ride comfort and safety of the whole vehicle. In terms of vertical turbulence suppression performance, Huawei iTRACK further reduces the sense of impact, and maximizes the bumps through wheel-end torque control to achieve speed reduction belt coasting feedback. The wheel-end speed fluctuation is reduced by 30%, which can realize that drinks are not spilled at the center console, passenger rest is not affected, co-pilot makeup is not shaken, and driving is not bumpy. Huawei iTRACK can be adapted to two-wheel drive and four-wheel drive models. After the intervention of Huawei iTRACK in different configuration versions, the measured data of the speed bump has been significantly improved, and the road conditions such as bumps have been leisurely weathered. It provides low-attached road coasting feedback, reducing the speed difference between the front and rear wheels by 25%, and driving smoother. It also provides low-attached road driving, reducing the speed difference between the front and rear wheels by 40%. High-speed driving in extreme weather does not skid. The driving in scenarios such as basement parking and low-speed driving at water beaches is also smooth and worry-free, and the kinetic energy recovery is more economical.

　　The seat has been redeveloped from the skeleton, sponge, foam, and face cover. The optimized seat improves the leg support of the seat cushion, the stress relief of the back waist, the back fit support, and the softness of the seat. higher on the priority list of optimization Shoulder support, back immersion optimization, or top pressure point optimization, support the waist suspension point: to ensure that the sedentary waist is not tired, and the curved support is full. In terms of seat filling optimization, multi-layer support, soft and hard combination: Based on ergonomic and pressure distribution analysis, different soft and hard foam materials and precision mechanical spring layers form multi-layer buffers to achieve a balance between soft sitting and support force. The seat cushion has multiple layers of comfortable interlayers, maximizing the contact area of the human body to eliminate the concentration point, homogenizing the pressure surface, the backrest and flanks, and the double hardness foam design. The support is in place without clamping the back. The seat cushion grid spring is mechanically adjusted to balance the left and right sitting postures. (Source: Avita Technology)