In the first seven months of this year, automobile exports reached 383.73 billion yuan, a year-on-year increase of 118.5%. Yesterday, the data released by the General Administration of Customs showed that Chinese cars went to sea with explosive growth. Guangzhou Daily’s all-media reporter observed that auto companies have taken a two-pronged approach to seize the domestic and international markets. The domestic market is not weak in the off-season, and auto companies use price cuts to boost sales and run for the annual sales target.

　　Text/Guangzhou Daily All-Media Reporter Zhou Weili, Xu Xiaofang and Zhang Lu

　　overseas market

　　Going to sea from individual combat to group organization

　　Automobile export is growing into a new engine for the growth of China automobile enterprises. According to customs statistics, in the first seven months of this year, China’s automobile exports reached 383.73 billion yuan, an increase of 118.5%. In the first half of the year, 2.341 million vehicles were exported, a year-on-year increase of 76.9%; The export value of the whole vehicle was US$ 46.42 billion, a year-on-year increase of 1.1 times. China may export more than 4.5 million cars this year, which is expected to surpass Japan to occupy the first place in the world.

　　A number of car companies have accelerated to go to sea. BYD, Chery, Great Wall, BAIC, GAC, Geely, Weilai, Tucki and other auto companies have taken more than 70 trips to sea. Lang Xuehong, Deputy Secretary-General of china automobile dealers association, judged that there will be a window period of about ten years for the rapid growth of automobile exports. It is worth mentioning that the action of going to sea is not limited to the export of the whole vehicle. Supply chain export and brand building … … More China car companies choose to set up a system to go to sea.

　　Guangzhou car companies are also active participants in export. In July, GAC Ai ‘an announced the start of export, with Thailand as the first stop. By the end of May, Guangqi Honda had exported more than 2,400 ZR-V models to the European market, and will continue to promote its export business to the European market in the future. In the second half of the year, the Odyssey e:HEV produced in Zengcheng will be exported to Japan in reverse. The G6 model of Tucki released in June this year is also carried out simultaneously at home and abroad, and the new car meets the regulations and standards of many places around the world.

　　China’s import and export of goods increased by 0.4% in the first seven months.

　　General Administration of Customs: The data is in line with expectations, and the fundamentals of long-term improvement have not changed.

　　According to the data released by the General Administration of Customs, in the first seven months of this year, the total import and export value of China’s goods trade was 23.55 trillion yuan, up 0.4% year-on-year. Among them, exports were 13.47 trillion yuan, an increase of 1.5%. Lu Daliang, director of the Statistics and Analysis Department of the General Administration of Customs, said that China’s foreign trade import and export operation is stable and in line with expectations, and the long-term positive fundamentals have not changed.

　　"The performance of private enterprises is brighter, which provides some support for the growth of foreign trade." Bai Ming, a member of the Academic Degrees Committee of the Research Institute of the Ministry of Commerce, pointed out that in the first seven months, the import and export of private enterprises was 12.46 trillion yuan, up 6.7%, accounting for 52.9% of the total foreign trade value, up 3.1 percentage points over the same period last year.

　　Another noteworthy data is that in the first seven months of this year, China’s exports to ASEAN increased. In the first seven months, ASEAN was China’s largest trading partner, and the total trade value between China and ASEAN was 3.59 trillion yuan, up 2.8%, accounting for 15.3% of the total foreign trade value. The trade surplus with ASEAN was 627.51 billion yuan, an increase of 17%.

　　"China products are inexpensive, Southeast Asian e-commerce has a broad growth space, and logistics from China to Southeast Asia is convenient, and the live broadcast outlet also brings new opportunities." Wu Linhao, general manager of Best International’s cross-border business, said. The total volume of cross-border business of Best International increased by 11% in July this year.

　　Zhou Maohua, a macro researcher in the Financial Market Research Department of China Everbright Bank, believes that the decline in China’s export growth rate is mainly affected by the slowdown in overseas demand and the drag of price factors. Bai Ming suggested that foreign trade enterprises should attach importance to the domestic and international double circulation, increase the intensity of exporting to domestic sales, and increase the development of the domestic market.

　　home market

　　Traditional car companies: I am healthy

　　Since July, the price reduction in the auto market has not stopped. First, North and South Volkswagen successively announced the price reduction of ID. Series, with the highest price reduction of 87,000 yuan. Almost at the same time, Cadillac announced to adjust the price and rights of LYRIQ Ruige, a pure electric vehicle: the price of all products was lowered by 60,000 yuan, and the price was further lowered to 361,700 yuan after the discount was superimposed.

　　In late July, the reporter visited the first-line market and found that both fuel vehicles and pure electric vehicles have discounts ranging from 30,000 yuan to 60,000 yuan. It is worth mentioning that the preferential strength of pure electric vehicles owned by many head car companies is generally greater than that of fuel vehicles.

　　In August, the atmosphere of price reduction is still spreading. SAIC Volkswagen announced that from now until August 31, the prices of nine SUV models of SAIC Volkswagen will be reduced. Among them, the comprehensive discount of Tourang and Tourang X reached 60,000 yuan, and the plug-in hybrid of Tiguan L was 55,000 yuan.

　　SAIC MG MG offers limited-time discounts for its hot-selling models such as MG5 Scorpio and the third-generation MG6PRO, with a maximum discount of 26,000 yuan for bicycles.

　　New forces: me and

　　Li Xiang, CEO of LI, said that price reduction can’t increase sales, but it can hit competitors. When the price of traditional fuel vehicles is greatly reduced to hedge the penetration of new energy vehicles, how should new energy vehicles respond? The answer is: reduce the price.

　　Recently, Zero Run announced that some models of its C-series have reduced their prices, with the highest drop of 20,000 yuan. This is not the first time that Zero Run has reduced its price. In March this year, Zero Run has officially announced a price reduction.

　　Chery New Energy announced that the purchase of three models of Chery New Energy, namely Little Ant, Unbounded Pro and QQ Ice Cream, can enjoy different cash discounts, up to 10,000 yuan.

　　Ai ‘an launched the summer "price" activity, where users can enjoy three years’ interest of 100,000 yuan, limited-time financial subsidies, new car charging gifts worth 4,999 yuan, and replacement subsidies as high as 6,000 yuan.

　　Joining the new round of price reduction is the Great Wall Euler, which can enjoy a maximum discount of 30,000 yuan. Nezha Auto started the activity of reducing the price by up to 49,000 yuan.

　　Price reduction has become the norm, and the pressure on high inventory funds still exists.

　　Many car companies are ready to "reduce prices as a normal state". High inventory, the withdrawal of new energy vehicles from the state, and the switch of the national six b … … These are important incentives for the continuous price reduction of the auto market this year.

　　According to the statistics of china automobile dealers association, the inventory index of the automobile industry was lower than that of threshold for only one month in the past two and a half years. From fuel vehicles to electric vehicles, from local brands in China to multinational car companies, it is hard to bear the financial pressure brought by high inventory.

　　The wave of price cuts is also reducing the operating profits of car companies. Take Volkswagen as an example. In the first half of this year, the profit from the joint venture company in China dropped from 1.402 billion euros in the same period last year to 1.152 billion euros.

　　The good news is that the auto market is picking up. According to the statistics of the Passenger Car Association, in July this year, automobile retail sales hit a record high.

2019In, natural disasters in China were mainly floods, typhoons, droughts, earthquakes and geological disasters, and forest and grassland fires, wind and hail, low-temperature freezing and snow disasters also occurred to varying degrees. Snowstorm in Yushu, Qinghai, forest fire in Muli, Sichuan, landslides in Xiangning, Shanxi and Shuicheng, Guizhou, and Changning, Sichuan occurred one after another throughout the year.6.0Major natural disasters, such as earthquake of magnitude 6.0, super typhoon "Likima", heavy rains and floods in many southern provinces during the main flood season, and drought in summer, autumn and winter in southern China. After consultation with the Ministry of Industry and Information Technology, the Ministry of Natural Resources, the Ministry of Housing and Urban-Rural Development, the Ministry of Transport, the Ministry of Water Resources, the Ministry of Agriculture and Rural Affairs, the Health and Wellness Commission, the Bureau of Statistics, the Meteorological Bureau, China Banking and Insurance Regulatory Commission, the Grain and Reserve Bureau, the Joint Staff of the Central Military Commission and the Political Work Department, the Red Cross Society, China National Railway Group Co., Ltd. and other member units of the National Disaster Reduction Committee, all kinds of natural disasters were caused throughout the year.1.3Hundreds of millions of people were affected,909People are dead and missing,528.6Ten thousand emergency transfer and resettlement;12.6Ten thousand houses collapsed,28.4Ten thousand rooms were seriously damaged,98.4Ten thousand rooms are generally damaged; Affected area of crops19256.9Thousands of hectares, of which no harvest.2802Thousand hectares; direct economic loss3270.9100 million yuan.

2019In, under the strong leadership of the CPC Central Committee with the Supreme Leader as the core, the Emergency Management Department adhered to the guidance of the Supreme Leader’s Socialism with Chinese characteristics Thought in the New Era, conscientiously implemented the decision-making arrangements of the CPC Central Committee and the State Council, made every effort to modernize the emergency management system and capacity, kept an emergency state at all times, and guided the national emergency management system to do a good job in disaster prevention, mitigation and relief, effectively and orderly responding to a series of major natural disasters. The number of people who died and disappeared due to natural disasters, the number of houses collapsed and the direct economic losses accounted for.GDPClose specific gravityfiveThe annual average decreased respectively.25%、57%and24%.2019The main features of natural disasters in China in are:

First, the flood disaster is "more in the north and south, less in the middle", and the geological disasters are high in the south-central and southwest regions.

2019In, the precipitation in most parts of the country was on the high side, showing "more in the north and south and less in the middle" on the whole. Among them,six－eightIn October, several rounds of rainfall in southern China were concentrated and overlapped, and the main rain belt always lingered in Guangxi, Jiangxi and Hunan, leading to Guangxi, Jiangxi, Hunan, Guizhou and Sichuan.fiveSerious floods occurred in provinces (regions), causing heavy casualties and serious direct economic losses.seven－eightIn June, there was persistent rainfall in northwest and northeast China, and many rivers such as Heilongjiang and Songhua River exceeded the warning water level, and crops were affected in a large area. In Jiangsu, Anhui, Hubei, Henan, Shandong and other provinces from the north of the Yangtze River to the Yellow River basin, the rainfall in flood season is obviously less than that in the same period of normal years, and the flood disaster is at a low level in the same period of recent years. In addition, the number of geological disasters in Central and South China is the largest, and the geological disasters in Southwest China have caused the heaviest disaster losses and the largest number of people who died and disappeared due to disasters. On the whole,2019The losses caused by floods and geological disasters showed a downward trend in.

Second, there are many typhoons and few landings, and the super typhoon "Lichima" has great influence.

2019Annual totalfiveTyphoon landed in China, with an average of less than many years.2A.fiveThe intensity of the landing typhoon was weak as a whole, but the firstnineThe extreme characteristics of the super typhoon "Lichima" are obvious, which is1949Since, the typhoon has landed in mainland China with the fifth strongest intensity, and the maximum wind force near the center reached.16Level (fifty-tworice/Seconds), rainfall in parts of Zhejiang, Anhui, Jiangsu and Shandong reached.350－600Mm, far exceeding the local historical extreme, resulting in Zhejiang, Anhui, Fujian, Shandong and so on.nineProvince (city)209.7Ten thousand people were urgently transferred and resettled,1.5Ten thousand houses collapsed,13.3Ten thousand rooms were damaged to varying degrees. Besides,2019In 2000, there were few typhoons going inland westward, excepteightSuper typhoon "Lichima" and10Typhoon Mina brought strong rainfall to Zhejiang, Jiangsu and other places in August, but no other typhoon penetrated into the middle and lower reaches of the Yangtze River, which aggravated the development of drought in the middle and lower reaches of the Yangtze River to some extent.

Third, the drought has occurred in stages and regions, and the drought in summer, autumn and winter in southern China is serious.

2019Winter and spring drought, summer, autumn and winter drought and regional drought occurred successively in.2－fiveIn June, the northeast region suffered from spring drought, and most of Yunnan and southern Sichuan experienced winter and spring drought.five－eightIn September, the ground temperature in Jianghuai, Huanghuai and other places was high and there was little rain, among which the drought in Shanxi, Henan and other places was heavier, and there was a staged summer drought.sevenSince late October, the precipitation in eastern Hubei, central and eastern Hunan, most of Jiangxi, southern Anhui and central and northern Fujian has been less than normal.five－nineCheng, for1961Since, the same period in history has been the least, and the temperature in most of the above areas is higher than normal, which has caused the occurrence of near in Hubei, Hunan, Jiangxi and Anhui.40The worst drought in summer and autumn in years. Generally speaking, although the drought has reduced the production of cash crops and grain crops in some areas, it has not had a significant impact on the overall grain harvest in the whole year. YujinfiveCompared with the annual average,2019In, the number of people living in need of assistance due to drought in China increased.65%The affected area of crops and direct economic losses were reduced respectively.22%and4%.

Fourth, the seismic activity in the western region is relatively active.

2019It happened in mainland China in.twentytimefiveEarthquakes of magnitude above, among whichsixEarthquakes above magnitude2Time, did not happen.sevenEarthquakes of magnitude above. western part of the countryfiveEarthquakes above magnitude account for the national total85%, among which,fourmoon24Medog County, Xizang, Japan6.3Magnitude earthquake, yes2019The earthquake with the highest magnitude in 2000 caused a small number of cracks in houses in Medog County.sixmoon17Changning, Sichuan6.0Magnitude earthquake, yes2019The earthquake with the worst disaster in 2008 caused13People die,3500More than two houses collapsed,22.3Ten thousand houses were damaged to varying degrees. Besides,2moon24－25Rongxian county, Sichuan province4.7Level,4.3Grade sum4.9Magnitude earthquake,fivemoon18Rijilin Songyuan5.1Magnitude earthquake,ninemooneightRi Sichuan Weiyuan5.4Magnitude earthquake,10moon28Ri Gansu Xiahe5.7Magnitude earthquake,11moon25Jingxi, Guangxi5.2Magnitude earthquake,twelvemoon26Japan Hubei Yingcheng4.9The magnitude-8 earthquake also caused some losses.

Five, the temporal and spatial distribution of wind and hail disasters is relatively concentrated, and the low temperature freezing and snow disasters are significantly lighter.

2019Appeared all over the country in37Sub-strong convective weather process, closefiveThe annual average is less, and the temporal and spatial distribution of wind and hail disasters is more concentrated. Time is concentrated infour－eightIn June, the region was concentrated in East China, Central China and North China, and Inner Mongolia, Hebei, Tianjin, Beijing, Liaoning and other places had experienced super-development.10Strong winds caused heavy local losses. Low-temperature freezing and snow disasters mainly concentrated at the beginning of the year, affecting the eastern part of northwest China, Northeast China, Huanghuai, Jianghuai, Jianghan and other places. Crops in parts of Qinghai, Shanxi, Inner Mongolia, Shaanxi, Hunan and Yunnan suffered from low-temperature freezing and snow disasters. YujinfiveCompared with the annual average, the disasters caused by low-temperature freezing and snow disaster are obviously lighter, and the affected area of crops and direct economic losses are reduced respectively.70%and84%

Six, the forest and grassland fire situation is generally stable, and the number of occurrences and the affected area have achieved a "double decline."

2019A total of forest fires occurred in China in.2345, including major fire.eightOutbreaks and major firesoneArea of damaged forest13505Ha. and2018Compared with, the number of forest fires decreased.133Rise and fall5.4%; Decrease of damaged forest area2804Ha, decline17.2%. Grassland fires broke out all over the country.45, including major fire.oneOutbreaks and major fires2All of them were caused by fire from abroad, and the area of the affected grassland was about66705Ha.

1, the project lead reporting unit in principle should be registered in the city’s independent legal entity, with strong research and development strength and organization and coordination ability. Science and technology demonstration projects are in principle construction projects in this city, which should be declared by the construction unit (development unit) or by other related units participating in the project after the consent of the construction unit (development unit). In principle, the person in charge of the project should be the proposer of the research idea of the main body of the project and the researcher who actually presides over the research, and take up the post before the project is concluded. 

2. All project units and participants shall abide by the requirements of scientific research integrity management, and shall promise the authenticity of the submitted materials. The project units shall review the authenticity and completeness of the application materials, and shall not submit the application materials with confidential contents. 

3. The parties to the cooperation have a clear agreement or intentional agreement on the future ownership of intellectual property rights and the ownership of the benefits from the transformation of achievements, and they are in line with the relevant provisions of Chinese laws and regulations on the ownership of intellectual property rights and the benefits from the transformation of achievements. 

4. The research and demonstration funds required for scientific research projects are mainly self-raised. The project budget shall comply with the relevant provisions of the state and this Municipality on the management of scientific research project funds. 

5. The platform listed in the Science and Technology Innovation Platform (the first batch) of Shanghai Housing and Urban-Rural Development Management Committee can declare two scientific research projects.

Original Zhao XI’s preface to Xi area This article is paid reading content, and paying users can give a friend a chance to read this article for free.

Cardiac CT scanning is an important achievement of CT development in recent 20 years. With the continuous progress of equipment, the fastest single sector time resolution has reached 66ms(SOMATOM Force). The improvement of time resolution is an important direction of CT development, and the most effective method is to improve the rotation speed of the gantry.

The earliest cardiac CT imaging mainly used ECG-gated technology, which retrospectively selected images in the relatively static position of heart movement and reconstructed them, so it was called retrospective ECG-gated scanning technology.

What is retrospective ECG-gated scanning technology?

Retrospective ECG-gating is what we usually call "back door gating". Retrospective ECG-Gating technology uses the synchronous acquisition technology of ECG and CT scanning to obtain the synchronous data of continuous spiral scanning and heart movement. After scanning, we can select any phase needed in the cardiac cycle according to the synchronized ECG for reconstruction.

According to the setting of CT scanner, the phase is defined as the percentage of relative-relative interval (such as 75%) or the absolute delay value (such as 700 milliseconds). (see:). It is known that the cardiac phase with the least motion artifacts is different between each coronary artery and the patient. Generally speaking, at low heart rate (i.e. < 65 bpm), coronary artery images with (almost) no motion are provided in the middle or late diastole. However, end-systolic reconstruction is necessary for a higher heart rate.

Searching for the best phase for each coronary artery from several phases (images are usually reconstructed with 5% R-R interval) is very time-consuming and requires great efforts. For automatic technology, "motion map" has advantages, which derives velocity function between multiple low-resolution reconstructions of cardiac cycle, and the minimum difference period between adjacent phases indicates the minimum cardiac motion.

Cardiogram. The abscissa z shows the relative anatomical position of the heart, and the ordinate shows the position of adjacent images when the heart fluctuates. Blue indicates that the motion amplitude is small, and red indicates that the motion amplitude is large.

For images without cardiac motion artifacts, the acquisition time must be shorter than 19.1 milliseconds. Multi-slice spiral CT and electron beam CT do not have such high time resolution; Therefore, CT scanning imaging of the heart needs to properly adjust the scanning window to a relatively stable heartbeat phase.

According to Lu et al., by using ECG trigger/gating to optimize the cardiac phase, for a patient’s baseline heart rate of 50 to 100 beats per minute (bpm), a cardiac image with minimum motion can be obtained with an acquisition time of 50.9 to 75.5 ms..

Minimum and maximum velocity of three main coronary arteries in cardiac cycle (mm/s)

Lu B , Mao S S , Zhuang N , et al. Coronary artery motion during the cardiac cycle and optimal ECG triggering for coronary artery imaging. Investigative Radiology, 2001, 36(5):250-256.

In addition to coronary angiography, retrospective ECG gated scanning can evaluate global and local cardiac function (ejection fraction) and valve shape and function. Retrospective ECG gated scanning can adapt to patients with mild irregular rhythm.

Electrocardiogram editing technology. The heart rate of patients with arrhythmia is 34-145 beats/min. In 75% of R-R reconstruction, obvious stepped (that is, banded) artifacts (left) are shown. Applying ECG editing technology (right) can reduce image registration errors.

Horiguchi J , Yamamoto H , Kihara Y , et al. Prospective ECG-triggered sequential versus retrospective ECG-gated spiral CT: Pros and cons. Current Cardiovascular Imaging Reports, 2009, 2(6):447-454.

Using ECG editing technology, the position of time window in cardiac cycle can be modified at will, and some or all artifacts caused by arrhythmia can be corrected and compensated. Therefore, by covering the data of the whole cardiac phase, retrospective ECG gated scanning can be used for multiple cardiac phase reconstruction and is robust enough for slight heart rate changes.

As an improvement of the traditional retrospective ECG-gated scanning, the current multi-row CT scanner has the so-called "ECG modulation" option, which modulates the tube current in a specific part of the cardiac cycle, allowing the radiation dose to be reduced by 30% to 50%.

The degree of reduction mainly depends on the setting of two parameters:

1) Percentage of minimum tube current/maximum tube current; and

2) The time length of the minimum tube current relative to the R-R interval.

For patients with low heart rate, systolic phase is usually not used for coronary angiography, and systolic phase can be selected as a window to reduce current. However, the low-dose data can reasonably evaluate the cardiac function, because such high image quality is not needed in the systolic phase of the heart in the above cases.

Prospective ECG trigger technology and retrospective ECG gating technology

A. The traditional retrospective ECG gated scanning is carried out in spiral mode with fixed tube current during the whole cardiac cycle. B retrospective ECG-gated scanning with ECG modulation can reduce the tube current in a specific part of the cardiac cycle (usually during systole) and allow the radiation dose to be reduced by 30% to 50%. C. Prospective ECG trigger scanning applies radiation during a short and predetermined acquisition window of the cardiac cycle, thus reducing the radiation dose by about 80% compared with retrospective ECG gated scanning. D x-ray irradiation in prospective ECG trigger scan can be prolonged to increase additional reconstruction usability. It can regulate some heart rate variability; However, this is at the expense of increasing radiation exposure.

Horiguchi J , Yamamoto H , Kihara Y , et al. Prospective ECG-triggered sequential versus retrospective ECG-gated spiral CT: Pros and cons. Current Cardiovascular Imaging Reports, 2009, 2(6):447-454.

What is prospective ECG trigger scanning technology?

Prospective ECG trigger scanning technology can be traced back to more than 40 years ago. The new SOMATOM 2 equipment produced by Siemens Medical in 1979 can image the beating heart for the first time. This is achieved by a so-called ECG "trigger": ECG measures the heart function, so that SOMATOM 2 is synchronized with the patient’s heartbeat. Then, the device sends out X-ray pulses at a specific time point of the heart beating, and collects data during diastole instead of when the heart is pumping blood. This makes CT images largely free from the interference of heart activity.

SOMATOM 2，1979

Prospective ECG trigger sequence acquisition

Usually when we refer to the prospective ECG trigger scanning technology, we mainly refer to the prospective ECG trigger sequence acquisition.

At present, the prospective ECG trigger scanning technology has become the preferred cardiac imaging technology, which is exposed during the short and predetermined acquisition window of the cardiac cycle. The r wave on the electrocardiogram is monitored. Scanning starts after a time delay and stops after a time to resume at a similar time in the next cycle.

Early electron beam CT also used prospective ECG trigger scanning technology, which had high time resolution, but poor image quality, and was eventually eliminated (see). It can be seen that the image quality is in a very important position in imaging, and it is feasible to improve the temporal resolution in advance before ensuring the image quality.

Coronary CTA images of electron beam CT

Achenbach S . Value of electron-beam computed tomography for the noninvasive detection of high-grade coronary-artery stenoses and occlusions.[J]. New England Journal of Medicine, 1998, 339(27):1964.

The traditional prospective ECG trigger scanning technology is exposed at a specific time in the R-R interval, so the image quality will be reduced in the case of premature beats or other arrhythmia.

On 64-slice spiral CT, sequential scanning technique (about four exposures) is used to cover the whole heart. Skip one heartbeat between adjacent X-ray exposures to allow the patient table to move unless there is a low heart rate (for example, < 48 bpm), in which case the patient table can move during the X-ray stop time (systole). Due to the incorrect fusion of two adjacent data sets, staircase artifact is a shortcoming of traditional prospective ECG-triggered CTA. This may be caused by unstable heart rate and body movement. In this respect, 256-slice or 320-slice CT scanning, as well as the Flash mode of Shuang Yuan CT, allow scanning to be completed in one heartbeat, and there will be no cross-sectional artifacts.

At least 180 parallel ray projections are needed to reconstruct the image. Single-source CT scanner needs half a revolution plus a fan angle (about 50-60) to transmit such a large amount of data. The time resolution of the rotation center is half of the rotation time. In order to reduce the radiation dose as much as possible, the shortest gantry rotation (230–240) is used, and imaging is limited to one cardiac phase. In order to adapt to some heart rate changes or obtain wide-phase data (for example, end systole to end diastole), the exposure time can be extended at the expense of increasing radiation exposure.

The optimal duration depends on several factors:

1) the patient’s heart rate and variability;

2) the purpose of cardiac examination (coronary artery imaging or including functional analysis); and

3) Different gantry rotation speeds (0.25-0.35s/r) that affect the time resolution.

Different CT devices have different abilities to extend exposure time. If the exposure duration can be set long enough, functional imaging or multi-segment reconstruction using two adjacent cardiac cycles is possible.

In addition to the single-source CT scanner, for the first generation of Shuang Yuan CT, there are two acquisition systems installed on the rotating gantry with an angle offset of 90, and the 180 parallel ray geometric data can be divided into two 90 data segments. This 90 data segment was acquired at the same anatomical level at the same time. Therefore, the temporal resolution is 83 ms. When multi-sector reconstruction is applied, the temporal resolution of 41 to 83ms (60ms on average) can be achieved. For the new Shuang Yuan CT system, the time resolution of single sector can be improved to 66-75ms, and the highest time resolution can reach 33-37ms when multi-sector reconstruction is applied.

Gating/triggering technology. This picture shows four ECG gating/triggering methods, and the blue box shows the real-time current. In the case of retrospective ECG gating using dose modulation, the higher box represents the total tube current, while the shorter box represents the reduced tube current.

Prospective ECG trigger spiral acquisition

For Shuang Yuan CT system, a new forward-looking ECG-triggered spiral scanning technology (Flash Spiral mode) was invented. Flash Spiral mode and DSCT system provide a way to scan the heart in a heartbeat by using a new spiral acquisition (the examination table moves continuously during image acquisition) specially developed for DSCT.

In single source CT, the pitch must usually be limited to p≤1.5 to ensure seamless volume coverage along the Z axis. If the pitch is increased to p > 1.5, the appearance of sampling gap hinders image reconstruction, and there are not too many images to cause artifacts. For cardiac imaging, the pitch is generally around 0.2, and more overlap can ensure that the same phase position of different R-R intervals in the Z-axis direction is continuous. Interpolation artifacts will occur when the pitch is too large (see).

However, for DSCT, the data obtained by the second measurement system after a quarter of a week can be used to fill these gaps. In this way, the pitch can be increased to p > 3.2 while still allowing image reconstruction. The time resolution of each individual axial image is a quarter of the rotation time. At the same time, due to the high pitch, overlapping radiation exposure is avoided, thus reducing the radiation dose of patients to the minimum theoretically achievable, usually less than 1mSv.

Schematic diagram of Flash spiral mode. For simplicity, only the path of one of the two groups of X-ray tubes and detectors is shown. (a) In the Flash spiral mode, a very high pitch is used so that the X-ray tube and detector can rotate around the patient without overlapping. (b) Image acquisition begins at the end of systole and is completed within one cardiac cycle. The actual duration of image acquisition depends on the width and scanning length of the detector. (c) The time resolution of image reconstruction is about one quarter of the gantry rotation time (here, the gantry rotation time is 280ms, and it is 75ms). Subsequent images are reconstructed at adjacent time points in the cardiac cycle.

Achenbach S, Marwan M, Schepis T, Pflederer T, Bruder H, Allmendinger T, Petersilka M, Anders K, Lell M, Kuettner A, Ropers D, Daniel WG, Flohr T. High-pitch spiral acquisition: a new scan mode for coronary CT angiography. J Cardiovasc Comput Tomogr. 2009 Mar-Apr; 3(2):117-21.

So let’s sum up, retrospective ECG is used in retrospective scanning, and then the reconstructed time image is determined according to ECG. Prospective scanning is ECG-triggered scanning, which can be divided into two modes, one is prospective ECG-triggered sequence scanning, and the other is prospective ECG-triggered spiral scanning, that is, large pitch mode, which can only be used in Shuang Yuan CT.

Therefore, the statement of "front door control" is untenable. To put it more strictly,

　

1905 movie network news Directed by,,, and starring in the action crime film will be released nationwide on July 6. The film recently released a special "Real Gun Real Scene Real Explosion", which fully revealed the behind-the-scenes details of the crew’s months of 1:1 to build 50,000 Pingjin Triangle Poison Village, and the creators’ experience of shooting real guns and real explosions in the action scenes in the film. The whole group does not care about the cost to bring the audience the most shocking audio-visual experience.

In the previous trailer, the air strikes on the drug village, heavy gunfights, car chases and explosions were impressive. Today’s special "Real Gun Real Scene Real Explosion" is the behind-the-scenes shooting of these large-scale action scenes, and will show the construction process of the flat drug village one by one 50,000. It is reported that the film invested nearly 300 million Hong Kong dollars and traveled to Xishuangbanna, Huizhou, Shanwei, Hong Kong and other places to shoot. The crew spent a lot of money to build a nearly 50,000-square Golden Triangle drug village scene in Huizhou for shooting, and moved the entire drug village from Huizhou to Hong Kong after the shooting was interrupted due to the epidemic. Liu Qingyun said: "When I first saw this scene, I was curious how they could find such a big place in Hong Kong." Guo Fucheng said bluntly: "The drug village is very shocking, I didn’t feel like I was in Hong Kong at all when I was shooting!" The 1:1 restoration of the drug village is full of details, allowing the actors to be more immersed in the interpretation, and also making the audience feel as if they are really in the golden triangle full of gunpowder, and the tension is bursting.

"When I read the script, I didn’t expect the scene design that the director hoped would be so exaggerated. It should be said that’Anti-Drug 3 ‘is a police and gangster movie beyond my imagination!" It is reported that in order to present a more realistic and shocking audio-visual effect to the audience, the main creative team specially applied to the public relations bureau of the Hong Kong police in China for a gun license and used real firearms for shooting. There are as many as 18 kinds of firearms in the film, including M92 pistols, MP5 submachine guns, M16 assault rifles, M870 shotguns, M60 vehicle-mounted heavy machine guns, etc., and other weapons such as mortars, RPG rockets and M18A1 mines were used. In addition, the large-scale explosion scenes in the movie are even more dizzying, ranging from car bombings to air strikes, and the domineering appearance of the F16 Fighting Falcon, which is known as the "King of Flight" for its unique design and excellent performance. The actors personally went into battle to blast the scene, and even the machine was damaged due to trying a new shooting method, all of which reflected the sincerity of the crew in the action design. The film strives to bring the audience unprecedented audio-visual shock with the most exciting and tense presentation effect, which is highly anticipated.

The movie "Anti-Drug 3: People in the End of the World" tells the story of the drug lord Kang Sucha (Liu Qingyun, played) who has been engaged in drug dealing with his subordinate Zhang Jianxing (Guo Fucheng, played). The new member Ou Zhiyuan (Gu Tianle, played) also has a life-long friendship with the two due to an accident, and the three are brothers. After Kang Sucha’s drug trafficking business in Hong Kong was investigated by the police, he fled to the Golden Triangle with his team to develop, but accidentally discovered that there were undercover agents around him. At this moment, it is enemy or friend, and it is at a loss…

The movie "Anti-Drug 3: People in the End of the World" will be released on July 6.

1905 movie network news Based on Frank Herbert’s famous sci-fi novels, the Hollywood sci-fi giant created by Legendary Pictures and Warner Bros. Exploration Group of the United States was officially finalized in the Mainland on March 8, 2024. After the announcement of the "Destiny is Coming" version recently, it once again detonated the whole network. The film Dune: Part Two follows the first story, which tells the legendary journey of Paul Cui Di (decoration) after he was killed by the emperor and the Hakanans, and he met the freeman female warrior Cheney (decoration) on Dune Planet and joined the freeman people. Paul went to war with the conspirators who ruined his family. At the same time, he was faced with the dilemma of the love of his life and the fate of the known universe. The "chosen son" was born like a god, and the flame of revenge spread. The Dune Planet is about to stage the ultimate cosmic war that shocked the global big screen.

The film is directed by the new godfather of science fiction film (), starring Timothée Chalamet, Zendaya,,,,,,,, and so on. The film has been scheduled for March 8, 2024, so stay tuned!

Love and War Show Destiny, Choice, Revenge and Conspiracy, which trigger the ultimate war.

Paul Cui Di (Timothée Chalamet), the male host of the film Dune series, often has prophetic dreams, in which his later lover &mdash; &mdash; Freeman woman warrior Cheney (Zendaya), and the universe war caused by her being a "chosen son". In the movie Dune: Part Two, Paul will gain the ultimate strength and grow into a real "chosen son"! The most important love and war in his life will happen at the same time on the sand dune planet. All this starts with mastering the real "desert power": Paul will try to tame the giant sandworm with a sand hook to become a real freeman warrior, and he will begin to master the marching and fighting methods of freeman people skillfully. After he opens his eyes, his eyes will gradually become blue pupils like those of freeman aborigines. He even drank the "water of life" and gained the ability to know the past and the future at the same time. The dune planet is rich in the most precious resource "spice" in the universe, which is the best weapon to influence all forces and control power. A moment of peace and beauty brought by love and a series of wars brought by power seem to be inevitable fateful choices in Paul’s life. In order to win, it seems that he can only choose power to give up love, which seems to lead Paul’s life to a more tragic fate.

　 In the first film, shortly after the benevolent Cui Di family came to Dune Planet, they were killed by two camps, namely, Emperor Padisha (christopher walken) and Harkonan family. For Paul, this is an unforgettable hatred of the Cui Di family. The freeman people, the indigenous people of Dune Planet, have been oppressed by the Hakanans for many years. In the movie Dune: Part Two, Paul will fight back and the king will return: join thousands of freeman armies against the joint army of Emperor Padisha and Hakanans. In a long-awaited large-scale sandstorm, gather an army of giant sandworm riders to take revenge on the Hakanans and challenge the imperial emperor! This is the original famous scene that fans of "Dune" series are most looking forward to, and it is also the big-screen audio-visual feast that the global audience is most looking forward to in 2024. The appearance of another "chosen son" candidate, Fidel Rosa Harkonan (austin butler), stands in Paul’s way of revenge. The so-called "chosen son" is deeply related to the fate of the universe empire. All this is also a shocking conspiracy that spans thousands of years and is carefully laid out by the most mysterious organization in the universe.

Style Science Fiction Explodes "Immersive Audio-visual" Real-life Shooting to Create "Invisible Special Effects"

After a lapse of three years, denis villeneuve, the "style director" who developed a new look of Hollywood sci-fi movies, upgraded the big-screen immersion experience in an all-round way on the basis of continuing the aesthetic style of the first work in the series, trying to bring subversive audio-visual shock to fans all over the world through Dune: Part Two. As the prospect of the movie magazine Hollywood Reporter said, "It’s never too late to enter Dennis’s Dune series. You don’t even need to really understand it. You just need to immerse yourself in the romantic world constructed by this film, let the light, shadow and sound effects invade your nerves in a friendly way, and feel it like Paul Cui Di. We have reason to believe that Dune: Part Two will still be a masterpiece, because immersion is the most direct feeling of a film’s good or bad, and immersion is the graceful background of this film. "

Abandoning the green screen as much as possible to achieve the ultimate real-life shooting is the consistent visual guarantee of "Vickers Dune". Different from most sci-fi movies today, Dune series hopes to give the sci-fi genre a more realistic screen effect with "reality". Therefore, real-life shooting is indispensable. For actors, massive real-life shooting can be called the gospel of performance. As Timothée Chalamet, the main actor, said, "Actors can get inspiration from the real environment and make the scene come alive, so the audience can feast their eyes on it." In order to achieve this feat, director Villeneuve cooperated with artistic director patrice Ouimet (Dune, Arrival and Blade Runner 2049) to preview the real scene visually, and with the help of photographer Greig Fraser (Dune, New Batman and Mandalorian) and the set team, it was absolutely grand and magnificent. The director once said frankly: "One of the themes of Dune is about nature, and it is very important for me to be infinitely close to reality. After all, this series is my love letter to the big screen, and I hope the audience can get a real experience from it."

Hollywood science fiction giant Dune: Part Two mainland has been scheduled to be released nationwide on March 8, 2024, so stay tuned!

Cctv newsAccording to the website of the People’s Bank of China, the People’s Bank of China and the State Administration of Foreign Exchange issued a notice on improving the digital service level of banks in handling capital account business. Details are as follows:

In order to further facilitate business entities to handle capital account business in a compliant and efficient manner and improve the digital service level of banks, relevant matters are hereby notified as follows:

　　1. Eligible banking financial institutions (hereinafter referred to as banks) can handle relevant capital account business (hereinafter referred to as digital capital account business) for eligible institutions or individuals (hereinafter referred to as business entities) through online examination of electronic documents in accordance with regulations.

　　The term "electronic documents" as mentioned in this Notice refers to valid documents and commercial documents in electronic form, such as administrative licensing documents, contracts, invoices, etc., which have legal effect, conform to the provisions of existing laws and regulations, are recognized by banks and can be retained, and their forms include electronic documents automatically generated by the system and electronic scanned copies of paper documents. The relevant capital account business mentioned in this Notice refers to the foreign exchange business of capital account and cross-border RMB business that banks have the right to directly handle offline.

　　Two, the bank has the following conditions, can handle the digital business of capital projects:

　　(1) Establish a complete digital business management system for capital projects, including but not limited to business types, business management methods or operating procedures, management system during and after the event, risk prevention and control measures, etc.

　　(2) Having a technical platform or means for transmitting and storing electronic documents, and relevant technologies can ensure the legality, integrity and security of transmitting and storing electronic documents.

　　(three) business personnel and management personnel with corresponding business experience.

　　Banks should co-ordinate services to the real economy and guard against risks, and organize and authorize domestic branches to carry out capital account digitalization business according to laws and regulations according to the specific conditions of business risks, internal compliance and risk control in various regions.

　　III. Banks should consider the compliance and credit status of business entities in handling capital account business, and in principle, they should not handle capital account digitalization business for the following business entities:

　　(1) Enterprises in the list of foreign exchange receipts and payments of goods trade whose classification results are below Class A (excluding Class A).

　　(2) Business entities listed in the control list of the capital account information system or the key supervision list of cross-border RMB business.

　　(3) Business entities with a record of foreign exchange administrative punishment in the past year (domestic institutions established less than one year have a record of foreign exchange administrative punishment from the date of establishment to the date of handling capital account digitization business).

　　Four, business entities in the bank to handle the digital business of capital projects, should be submitted to the bank with legal effect, in line with the existing laws and regulations, recognized by the bank and can be retained by the real, complete and clear electronic documents.

　　Business entities shall not tamper with or reuse electronic documents in violation of regulations.

　　5. When a bank handles the digital business of capital projects, it shall take the equivalent due diligence measures to handle the related capital projects in the same offline way, strictly abide by the principles of exhibition industry, audit of related capital projects and file management requirements, and meet the following requirements:

　　(1) The bank shall require the business entities handling the capital account digitization business to submit electronic documents that conform to the provisions of Article 4 of this Notice and are consistent with the original transaction documents.

　　(two) the bank shall, in accordance with the provisions, make a reasonable audit of whether the electronic documents submitted by the business entities comply with the provisions of Article 4 of this Notice; If the electronic documents submitted by the business entity cannot prove that the transaction is true, legal and reasonable, they should be required to go offline and submit the original transaction documents and other relevant materials.

　　(3) Banks should take necessary technical identification and other means to avoid the same electronic document that should not be reused and the corresponding paper documents from being reused or tampered with.

　　(4) If a bank discovers that electronic documents are forged, altered or reused in violation of regulations, it shall stop handling the capital account digitization business for the business entity from the date of discovery, and report to the local branches of the People’s Bank of China and the State Administration of Foreign Exchange in a timely manner.

　　Banks should also comply with the Anti-Money Laundering Law of People’s Republic of China (PRC), the measures for the management of customer identification of financial institutions and the preservation of customer identification data and transaction records.

　　6. When handling the digital business of capital account, a bank shall, in accordance with the requirements of the Notice of the State Administration of Foreign Exchange on Issuing the Specification for Data Collection of Foreign Exchange Business of Financial Institutions (Version 1.3) (Huifa [2022] No.13), timely submit relevant cross-border revenue and expenditure, accounts, domestic transfers, settlement and sale of foreign exchange in accounts and other information.

　　For the submission of cross-border revenue and expenditure information, the word "CADS" should be marked in the column of "transaction postscript"; When submitting the information of account expenses, the word "CADS" should be marked in the "Remarks" column; For the submission of domestic transfer information, the word "CADS" should be marked in the column of "transaction postscript"; Involving the submission of foreign exchange settlement information, the words "CADS" should be marked in the column of "detailed use of foreign exchange settlement"; Where the information about foreign exchange purchase is submitted, the word "CADS" shall be marked in the column of "Filler"; Where the business registration of capital projects is involved, the words "CADS" shall be marked in the "Remarks" column of all kinds of agreement registration.

　　When handling the digitalization business of capital projects involving RMB cross-border receipt and payment, banks should also timely, completely and accurately report to the RMB cross-border receipt and payment information management system (RCC) according to the Administrative Measures for RMB cross-border receipt and payment information management system (Yinfa [2017] No.126) and the Notice of the General Office of the People’s Bank of China on Optimizing the Information Reporting Process of RMB cross-border receipt and payment information management system (Yinban Fa [2013] No.188).

　　Seven, the people’s Bank of China, the State Administration of foreign exchange to strengthen the supervision of the development of capital account digital business. If banks and business entities handle the digital business of capital projects in violation of this notice and the relevant provisions on the management of capital projects, the People’s Bank of China and the State Administration of Foreign Exchange will impose penalties according to the Law of the People’s Republic of China on the People’s Bank of China and the Regulations of People’s Republic of China (PRC) on Foreign Exchange Management.

　　Eight, foreign banks (Hong Kong, Macao and Taiwan banks apply mutatis mutandis) domestic branches with reference to this notice.

　　This notice shall come into force as of December 20, 2023. In case of problems in the implementation process, please give feedback to the People’s Bank of China and the State Administration of Foreign Exchange in time.

headline

● Su Chao’s latest battle report

● Nanjing bus escorts Su Chao.

● Nanjing Tent Conference Jiangdao Micro Vacation

● Slow Travel ROCK Music Festival held.

● Hua Chenyu Mars Concert Paradise Mode is open.

● Zhongshan Scenic Area launches hand-painted tourist maps.

● The Old Rock Art Exhibition is coming.

Today and tomorrow.

The city is cloudy.

The temperature keeps rising.

The highest temperature today is 31~32℃

The highest temperature tomorrow is 33~34℃

In the next few days

Rain will return to Nanjing.

The temperature will also drop.

Today’s headlines/Toutiao

[Su Chao’s Latest Battle Report]

On the evening of October 4th, the first knockout of "Su Chao", the game of Nanjing VS Lianyungang ended, and the latest scorer list of city league matches is as follows → Focus on details > >

01

On October 4th, outside the "Su Chao" stadium, Nanjing Bus successfully completed the guarantee task, helping more than 60,000 spectators to evacuate efficiently without congestion or detention. Two feeder lines maintain a high-frequency departure rhythm of 3-5 minutes, and nearly 100 "580" volunteers are scattered at different boarding points, so that fans can watch the game without worry and return smoothly. Details 02

From October 1st to 3rd, "Yuedong Dao Jiang Fun Outdoor-23rd Nanjing Tent Conference and 2025 Metropolitan Outdoor Sports Carnival" was held in E3, Jiang Xinzhou; Held in PARK Sports Park, it welcomed more than 20,000 tourists, and dozens of wonderful activities were staged in turn. Details 03

On October 4th, the Slow ROCK Music Festival was held in Lujia Lawn, Yaxi Slow City. From the afternoon carnival to the starry fireworks, you can feel the fiery rock spirit and fiery intangible skills talking at the same time and space. Details 04

On October 4th, 2025, Hua Chenyu Mars Concert Nanjing Station was grandly opened in Tangshan Music Valley, Nanjing, which was the first time that Hua Chenyu opened a paradise mode concert in Nanjing. Here, with a ticket, the audience can enjoy the long immersive experience of afternoon and evening performances and enjoy an unprecedented audio-visual feast. Details 05

In order to enhance tourists’ experience and convenience, Nanjing Zhongshan Scenic Area has launched a hand-painted version of the tourist map, which is divided into two sides, the front is hand-painted tour guide and the back is creative poster. In five areas with high personnel density in the scenic spot, it is directly distributed to tourists through 12 self-service devices. Details 06

Recently, the fine art exhibition of Laoshan Stone was officially launched in Fenghuang Pavilion in Pukou. As the first exhibition focusing on old rocks, this time dozens of fine old rocks were gathered, and the mystery of old rocks was unveiled in all directions through systematic display, attracting many art lovers to punch in. For details, feel the beauty around you.

The secret of happiness is hidden around you.

Good morning ~

@ Green, Dark, Red, Thin Rain, Smoke Photo

Original title: "Su Chao Latest Battle Report"