月度归档： 2024 年 6 月

Chinese scientists have discovered the Milky Way’s giant magnetic ring, which extends from 6,000 light-years to 50,000 light-years from the Milky Way’s center

China News Service, Beijing, May 14 (reporter
Sun Zifa) Chinese Academy of Sciences National Astronomical Observatory released news to the media on May 14, the station Dr. Xu Jun and Han Jinlin researcher by analyzing the pulsar in the Milky Way and the distribution of the Faraday rotation effect of the radio source outside the Milky Way, the latest research found that the Milky Way’s halo (Milky Way) has a huge magnetic ring structure, its magnetic ring extends from 6000 light years to 50,000 light years from the center of the Milky Way.

Chinese scientists have discovered the Milky Way's giant magnetic ring, which extends from 6,000 light-years to 50,000 light-years from the Milky Way's center

Schematic diagram of the structure of the giant magnetic ring in the halo of the Milky Way Galaxy. National Astronomical Observatory of the Chinese Academy of Sciences/Photo by

This landmark research paper by Chinese scientists on the magnetic field of the Milky Way has recently been published in the international scientific journal Astrophysical Journal (ApJ), providing crucial observations for the study of cosmic ray particle propagation, galactic gas dynamics, and cosmic magnetic field evolution.

The first author of the paper, Xu Jun, introduced that the origin and evolution of the cosmic magnetic field is a long-standing major problem in astrophysics, and it is also a priority topic for many large radio telescope projects such as the Square Kilometer Array Radio Telescope (SKA). They are all developing and improving polarization measurement capabilities, hoping to make efforts in this direction.

Among them, measuring the large-scale magnetic field structure of the Milky Way is a rather challenging work. Researcher Han Jinlin, who pioneered this field of research, has been deeply involved in the study of the Milky Way’s magnetic field for the past 30 years. He measured the large-scale magnetic field structure of the Milky Way’s disk region (the Milky Way’s disk) by observing the Faraday rotation effect of large-scale pulsars and extragalactic radio sources. He found that the direction of the large-scale magnetic field in the Milky Way’s disk is along the spiral arms and flipped between the spiral arms.

In the galactic halo region, Han Jinlin and others were the first to certify that the Faraday rotation effect has an antisymmetric sign distribution in the inner galactic sky as early as 1997, indicating that the galactic halo above and below the galactic disk has a circumferential magnetic field structure in the opposite direction, and it was subsequently confirmed by more astronomical observation data. It has been widely adopted by the international astronomical community and has become the basic content of the galactic magnetic field structure model. It has also been written into many international classic textbooks.

Han Jinlin, the corresponding author of the paper, pointed out that the size and strength of the magnetic ring structure of the galactic halo have been difficult to measure for more than 20 years, because pulsars and other celestial bodies in the galactic halo region near the sun also show the anti-symmetric distribution of the Faraday effect. Some international scholars speculate that Faraday objected to whether the sky is dominated by the interstellar medium in the local region of the Milky Way near the sun. "So, does this magnetic ring exist in the entire galactic halo or only in the local area? What is the strength and size of the galactic halo magnetic ring?"

In response to these problems, Han Jinlin innovatively proposed in this study that the measurement of the Faraday rotation rate of pulsars near the sun as the contribution of the local interstellar medium be deducted from the value of the Faraday effect sky distribution of the extragalactic radio source, so that the Faraday rotation effect distribution of the giant silver halo can be obtained. Xu Jun collected all the relevant data and used the 500-meter Aperture Spherical Radio Telescope (FAST), known as the "Chinese Sky Eye", to newly measure many faint pulsars.

After analyzing the data according to this innovative idea, they found that the average Faraday effect over the entire sky exhibits an antisymmetric distribution of galactic coordinates, and that the antisymmetric distribution is no longer limited to the inner galactic region, but fills the entire sky, extending from the central region of the Milky Way to its opposite direction. The results of this study suggest that the magnetic ring in the galactic halo extends from 6,000 light-years from the galactic center to 50,000 light-years (the sun is located about 30,000 light-years). The interstellar medium in the local region near the sun is obviously part of a large magnetic ring, and its basic properties and characteristics are basically the same as those of the large magnetic ring, but its effect is stronger because it penetrates deep into the galactic disk.

"I had this idea more than 20 years ago. I have been slowly accumulating data and finally got it." Han Jinlin said.

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What happened to the companies exposed by CCTV on March 15 last year？ This consumption has increased by 50% in the past three years.

　　CCTV News:It’s the annual March 15 Consumer Rights Protection Day. Last year, CCTV’s March 15 gala exposed the untrustworthy phenomenon in 14 fields such as online food ordering and used car online trading platforms. Ele.me, Che Yi Pai and other companies were named. As an ordinary consumer, when seeing the exposure, what matters more is "curative effect". So how has the rectification of these named companies been in the past year? Let’s take a look.

　　What happened to the companies that were exposed on March 15 last year?

　　Ele.me: Still playing "cat and mouse game" with illegal restaurants

　　At the 2016 CCTV 3.15 gala, the first to be exposed was the online ordering platform "Ele.me". The reporter’s investigation found that some restaurants were glamorous online, but in fact did not have a business license at all, belonging to black workshops. The "Ele.me" platform not only defaults to partners entering, but also guides merchants to make up addresses and upload fake physical photos.

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　　On the day "Ele.me" was exposed, it responded that it attached great importance to the problem and had urgently set up a special project team to remove all the illegal restaurants involved, and deployed overnight to check the qualifications of restaurants nationwide.

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　　Since then, "Ele.me" has indeed carried out a series of actions. These include publicly participating in the back kitchen of Mingchu Liangzao Restaurant to the whole network in the form of live broadcast, establishing an independent food safety department, jointly verifying the restaurant’s situation with a third party, and carrying out "Food Safety Month" self-inspection and self-correction work…

　　However, the effect of these actions does not seem to satisfy consumers, and "Ele.me" still makes headlines many times. For example, in July 2016, Legal Network reported that "Ele.me orders takeout and eats insects. Lawyers remind: preserve evidence"; in August 2016, Beijing News reported that "315 offline black stores have returned to Ele.me to apply for false certificates and squeeze into Baidu Meituan recommendation"; in September 2016, CCTV exposed "Ele.me" platform ghost restaurants… A series of reports all pointed to "Ele.me" having security problems such as unqualified merchants and poor service.

　　The "safety on the tip of the tongue" will not be achieved overnight, and this protracted battle may continue.

　　Car Easy Shooting: Losing the "Leading" Position in the Used Car Industry

　　"Individuals sell to individuals, no middlemen make the price difference" This advertising slogan has been familiar, and the used car O2O platform used to be in the limelight all the way. However, the leading "car easy to shoot" to make the price difference was named by CCTV 3.15 party. Reporters pointed out through a large number of undercover interviews that "car easy to shoot" has two sets of price difference scams with different prices.

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　　That night, Che Yi Pai immediately issued an official statement saying that "what the buyer sees is the car model plus the service fee, which is a common charging rule for used car e-commerce platforms." As soon as this statement came out, it immediately caused a strong backlash from public opinion, believing that it was not sincere. It clearly promoted "no price difference" and threw the blame on the used car industry.

　　Afterwards, Che Yi Pai issued an official statement again on the morning of March 16. This time, the statement also solemnly apologized, and the details of Che Yi Pai’s charges were announced on the homepage of the website overnight. The charging standards and charging principles were also made public.

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　　On March 19, the Che Yi Pai platform also made further product upgrades, publicizing the fees that should be charged on both the seller and the buyer. Both parties can see all the fees paid and charged by each other and their details. At the same time, during the transaction, Che Yi Pai charges the buyer a 3% transaction service fee.

　　Unfortunately, the crisis of consumer confidence in "Che Yi Pai" broke out, and the used car business shrank seriously. As a result, "Che Yi Pai" not only lost its halo of being a "leader" in the industry, but also stopped updating its official Weibo. The last Weibo post was posted on January 6, 2017. But from time to time, there are still fans who leave messages under Weibo: "Are you still there?"

　　Dao Youdao: Penalized 260,000 suspended so far

　　The company that was exposed below is a company listed on the New Third Board – Dao Youdao. CCTV reporters discovered that Dao Youdao used advertising pop-ups containing malicious programs to maliciously deduct fees from a large number of mobile phone users.

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　　After being exposed, Daoyoudao carried out an emergency suspension of trading, and responded on Weibo: "From now on, we will severely crack down on the use of the Daoyoudao platform to promote products that harm the interests of users. For users who suffer losses, the company will pay compensation first. According to the investigation results, the company reserves the right to pursue the responsibility of relevant product parties." Meaning that its platform was used, and he was also a victim.

　　On March 18, Dao Youdao released an announcement in response, saying that Dao Youdao removed video and game software products from the shelves at the first time, and screened them one by one to ensure that user interests were no longer damaged. It also established a special team to strengthen the control of product promotion and listing. It is also negotiating with industry associations to incorporate malicious fees into the green marketing supervision system.

　　However, the company is clearly not as innocent as it claims. In the following year, the company received three fines for illegal advertising and other acts, and the total amount of fines was 260,000 yuan.

　　In addition, since the first suspension announcement was issued on March 16, 2016, Dao Youdao has issued 19 consecutive suspension progress announcements, which have been suspended for nearly a year.

　　70% of consumers have suffered infringement, and 36% have given up their rights protection

　　On March 15, 2014, the newly revised "Consumer Rights Protection Law" was officially promulgated and implemented. China’s consumer rights protection system is making progress, and the consumer environment is also constantly improving. However, there are still many problems. Recently, the results of the 3.15 Consumer Rights Protection Questionnaire survey published by Consumer Reports magazine showed that 70% of respondents have encountered consumer infringement, and less than half of the infringed people have engaged in consumer rights protection.

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　　The main reasons why consumers do not protect their rights are the low amount involved and the lack of knowledge of which channels to use to protect their rights.

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　　The survey results also revealed that online transaction infringement occurs more frequently, and the main problem that constitutes consumer infringement is product quality.　

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　　Remote shopping complaints have increased by 50% in three years.

　　With the gradual popularity of online shopping and telephone shopping, the number of remote shopping complaints has shown an upward trend. From 20,135 in 2014 to 29,856 in 2016, an increase of nearly 50%.

　　"Remote shopping complaints have become a common complaint encountered by the Consumers Association." The China Consumers Association reported that quality problems such as defects, unfulfilled guarantees, and inconsistent publicity with the actual product have always accounted for the leading proportion; at the same time, the provisions of the new Consumer Law on "online shopping seven days without reason" have encountered difficulties in implementation, and e-commerce platforms and settled merchants have shirked and bounced, or expanded the scope of inapplicability without authorization. Problems such as non-fulfillment of promises and delayed resolution by merchants when returning goods have been repeatedly criticized by consumers.

　　Zhang Mao, director of the State Administration for Industry and Commerce, recently said that the development momentum of online shopping is now very good, but there are also many problems. "First of all, it is clear that the online platform should take the first responsibility, and the Internet is not an extrajudicial place. The most important thing is to strengthen the legal protection of online shopping, and some legal protection measures are still being explored."

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　　Quality remains a "big issue" to encourage social supervision

　　In fact, the problem of quality not only exists in the products purchased by consumers online, but also in the omni-channel consumer complaint data of the China Consumers Association.

　　The report of the China Consumers Association shows that in 2016, the National Consumers Association received a total of 653,505 consumer complaints, accounting for the top three in the nature classification, with quality problems accounting for 41.47%, after-sales services accounting for 22.73%, and contract problems accounting for 12.23%.

　　It is worth noting that the new Consumer Law also explicitly encourages and supports all organizations and individuals to conduct social supervision over acts that harm the legitimate rights and interests of consumers. In disputes between consumers and business operators, the objective voice of social appraisal agencies or organizations is still weak.

Beidou-3 Final Star was successfully launched! The meeting point reveals the way forward for Beidou

　　Intersection news, with the successful launch of the Beidou-3 GEO-3 satellite, our country’s Beidou satellite navigation system construction project has been successfully completed, the star array has been listed, and the global "Skynet" has been successfully woven. What changes will the "Beidou-3" bring to our lives in the future? After more than 30 years of practice and exploration, why is our country so persistent in the construction of the "Beidou" system? The reporter interviewed Professor Wen Xin and Professor Kang Guohua from the School of Aeronautics and Astronautics of Nanjing University of Aeronautics and Astronautics to explore the way forward for Beidou together.

　　You’ve already used Beidou, but you may not know it.

　　Many people know that our country launched the Beidou satellite, but they do not know that Beidou has long been available to the people and open to the world.

　　If you pay attention, it is not difficult to find that your smartphone can always accurately tell the time, almost not like a watch, occasionally "going fast" or "going slow", and it is the Beidou satellite navigation system that helps you "check the watch".

　　Kang Guohua, a professor at the School of Astronautics at Nanjing University of Aeronautics and Astronautics, told reporters that "Beidou" is not just a satellite launched into the sky, but a huge system project. Seemingly out of reach, it is actually closely related to our lives. "Since the 1980s, the whole world has been using the GPS of the United States. With the Beidou system, the absolute dominance of GPS in the field of global satellite positioning has been challenged, and now most of our mobile phones have begun to use the Beidou navigation system."

　　He took out his mobile phone and showed the reporter the satellite zenith map displayed by the mobile APP. The picture shows the movement of the satellites of the four major satellite navigation systems in the world on the local zenith. They are the Global Navigation and Positioning System (GPS) of the United States, the GLONASS system of Russia, the Galileo system of the European Union, and the Beidou system of China. "Among them, the color satellites that can receive signals are in orbit, while the black and white ones are temporarily unable to receive signals."

　　Each Beidou satellite weighs 850KG, has a payload weight of 300Kg, and carries three functions – positioning, timing and short message. Positioning is the foundation of navigation, and navigation is the application of positioning, Kang Guohua said. Positioning is "telling you where you are" and navigation is "telling you how to go from where you are now to where you want to go."

　　Timing, as the name implies, is to "give the exact time". For some instruments and equipment, it is to calibrate the time. As long as the Beidou timing function is used, even if it is distributed in different parts of the world, the time can still be "synchronized". Kang Guohua told reporters that time synchronization is a national security guarantee, such as high-speed rail, power grid, computer network communication, etc., all need time synchronization. For example, relying on the precise positioning of Beidou, the high-speed rail brakes from 350 kilometers per hour to parking, and the final stop error can be controlled within 10 centimeters.

　　Short messages are a unique feature of China’s Beidou. Unlike GPS receivers, which can only receive satellite signals in one direction, Beidou receivers can not only achieve positioning, but also send and receive text messages similar to mobile phones, and transmit two-way text messages through satellites.

　　During the Wenchuan earthquake rescue in 2008, the ground communication facilities were seriously damaged and even paralyzed. The rescue troops used Beidou short messages to send the first message from the disaster area, accurately reporting the disaster situation and the location of the disaster to the disaster relief and rescue headquarters, which played a huge role. At that time, the accuracy of "Beidou No. 1" was actually not high enough. Its two-way communication function had shown great power and saved countless lives.

　　"The stars move", and a "Skynet" has been woven for more than 20 years.

　　Behind the dream of "Big Dipper" is the relay struggle of several generations, from nothing to something, from weak to strong, the "Big Dipper" star is increasingly dazzling.

　　Professor Wen Xin of the School of Aeronautics and Astronautics of Nanjing University of Aeronautics and Astronautics told reporters that people’s ideas about the Beidou satellite navigation system can be traced back to 1983. Academician Chen Fangyun, a famous aerospace expert, first proposed the concept and idea of dual satellite positioning.

　　"The chief designer who set a three-step development plan for the Beidou satellite navigation system is Sun Jiadong, the father of our country’s’two bombs and one star ‘." Wen Xin introduced that in 1994 our country launched the construction of the Beidou satellite navigation test system, which is the "Beidou generation". The second step was to start the construction of the Beidou satellite navigation system in 2004. In 2012, a regional passive service capacity was formed. And the third step was this year, the formation of a global passive service capacity. "From 2007 to 2010, a network of satellites was launched continuously, weaving an information network in the sky."

　　Since the "Beidou Generation" uses a dual-star positioning method, the "Beidou Generation" has a lot of room for improvement in positioning accuracy, timing accuracy, service area, etc., especially the problem of large signal transmission delay. "For example, the positioning accuracy of the" Beidou Generation "is 20 meters, which means that the" Beidou Generation "cannot" see "two objects less than 20 meters away from the distant space and calculate their position difference.

　　Kang Guohua said that at present, our mobile phones are generally integrated with satellite systems from two, three or even four countries. "Why don’t we use China’s Beidou system alone? Because the Beidou-2 system focuses on the Asia-Pacific region, the service in other parts of the world is not very stable."

　　Kang Guohua compared the multiple launches of Beidou satellites to "puzzles". Beidou-1 is an experimental satellite, with only four satellites, which are only over our country and have all been decommissioned. Later, Beidou-2 is a regional networking satellite, covering a total of 20 satellites in the Asia-Pacific region. The space segment of the "Beidou-3" satellite navigation system consists of 27 medium-earth orbit satellites, 5 synchronous orbit satellites, and 3 inclined synchronous orbit satellites, totaling 35 satellites.

　　From the first satellite of Beidou-2, our country has launched 54 Beidou navigation satellites, which have been officially put into the network since June. The last network satellite launched on June 23 is the 55th in the entire Beidou satellite navigation system.

　　Kang Guohua said that although this time we launched the last star in the puzzle, in fact, the satellites in the Beidou system have been changing. "Each satellite has a lifespan, and it needs to be retired in an average of 8-10 years. Since the construction of the third generation of Beidou, many satellites have been retired and added. The significance of the 55th star is to make the Beidou system truly the Beidou of the world, and it can be located anywhere on earth."

　　The brightest Chinese star, let the stars in the sky "refer to the Big Dipper"

　　What is the significance of the Chinese astronauts’ dedication to the "Beidou" satellite?

　　As an important weapon of the country, Beidou is a major space infrastructure in our country. The goal of building our country’s space-time reference network and navigation information network is an important support for my great power status and strategic interests. "It can be said that the sooner the construction is made, the more strategic advantage it will have." Kang Guohua gave an example. "Satellite positioning requires the transmission of radio waves at specific frequency points from the sky to the ground. Since only specific frequency points have the least attenuation during the process of electromagnetic waves penetrating the atmosphere, these frequency points have become important strategic resources." According to the current ITU’s "first-served" rule for frequency point allocation, the United States has chosen the best frequency band because it was the first to build GPS.

　　The competition in satellite navigation is not only the competition of the technical system, but also the competition of constellations and signals. China, Europe, and the United States have gone through years of coordination work on satellite frequency and orbital position issues, and even "open and secret wars", which are full of "games" of aerospace powers.

　　The Beidou-2 navigation system has experienced such a pressing time. According to the relevant regulations of the ITU, the Beidou-2 navigation system must complete the satellite navigation signal in orbit and broadcast to the ground within seven years. Otherwise, the priority right to use the navigation frequency will be cancelled. It is necessary to reapply for the frequency and carry out relevant international coordination. As a result, our country will lose the best opportunity to develop a global satellite navigation system.

　　Facing the urgent development task, Chen Zhonggui, an alumnus of Nanjing University of Aeronautics and Astronautics and then the deputy chief designer of the Beidou-2 satellite, led the party commando team to improve the integrated test verification method, and fought for 8 months with "5 + 2" a week and "white + black" every day. On April 16, 2007, two days after the successful launch, Beijing received a clear signal from the flight test satellite. At this time, there were less than 4 hours left before the space frequency failure – it was this feat that effectively protected the frequency resources of our country’s satellite navigation system and opened the prelude to the construction of the Beidou regional navigation system.

　　"Today, the successful networking of the Beidou-3 global satellite navigation system marks that our country has the" capital "of PK with the strength of the US GPS navigation system in the field of satellite navigation systems. Beidou is not only a national project, but also a national project. ‘Beidou’ has multiple’firsts’." Wen Xin listed that the Beidou satellite navigation system has adopted the hybrid constellation system of three orbits (GEO, IGSO, MEO) for the first time; it has reached the requirement of 100% localization of components for the first time; and it has proposed cooperation and compatibility for the first time… These all make China’s aerospace and satellite monitoring technology more confident in the world.

　　For example, the on-board atomic clock, which is the "heart" of a navigation satellite, was once a technological blank in China. There was a time difference between radio wave transmission and reception, and the time difference multiplied by the speed of light was the distance. As long as the error was one second, the distance would be 300,000 kilometers. During the development of Beidou-2, a Swiss company was introduced, but later the European Union required the company to provide atomic clocks that were an order of magnitude less accurate than the "Galileo" navigation system, which made Chen Zhonggui and the design team more deeply realize that "key core technologies cannot be bought, or they cannot be bought, or they cannot be bought."

　　Today, our country has conquered the key technologies of rubidium atomic clock and hydrogen atomic clock, and used these two atomic clocks on the Beidou navigation satellite to achieve the establishment of time benchmarks. Among them, the on-board rubidium atomic clock has achieved 100% localization of components, and the current accuracy can reach 3 million The error is only 1 second, and the passive on-board hydrogen atomic clock has an error of 1 second in 10 million years.

　　At present, the Beidou-3 satellite has formed a distinct Beidou feature in terms of positioning services, wide-area enhancement services, global short message services, search and rescue services, etc., and has achieved partial leadership in foreign technology in terms of system signal performance, system transmission and ranging performance, on-board atomic clock performance, and localization of key products and components. In the open class on ideological and political affairs of Nanjing University of Aeronautics and Astronautics, Chen Zhonggui confidently pointed out that "the core of the Beidou-3 system is to serve the world with higher accuracy and higher performance," so that China’s Beidou is also the world’s Beidou! "

　　The era of "Beidou +" has begun, and it must be easy to use both in the sky and on the ground

　　After the Beidou global network, the speed of integrating the Beidou system with positioning, timing and short message services into the lives of ordinary people will accelerate. "Beidou +" life will come faster.

　　"It will become an infrastructure like the water grid and the power grid, and daily life can no longer be separated from it. If you order a takeaway or order a ride-hailing car, you need to use satellite positioning to determine your current location." Kang Guohua said, but then Beidou has to solve various problems such as reliability, accuracy and stability.

　　"Beidou’s biggest problem now is application promotion." Kang Guohua said that after all, GPS has been developed more than 20 years earlier than us, and users have become sticky and inertial. Take mobile phones as an example, replacing GPS chips with Beidou chips will increase a lot of external costs, and merchants have no incentive to replace them. Therefore, in some mature areas of GPS applications, replacing Beidou often encounters relatively large resistance. But the more people use Beidou, the lower the cost will be, and the faster the iterative improvement speed will be, forming positive feedback.

　　The research on "low-orbit satellite navigation enhancement" currently led by Professor Kang Guohua is related to the promotion and application of Beidou. "If we compare the Beidou system to a highway-like backbone network, it can provide positioning accuracy better than 10 meters; then our work is similar to building’provincial roads’, and further improve the accuracy on the basis of this backbone network."

　　As an example, Kang Guohua said that when you shuttle between city buildings, due to the "canyon" effect formed by the buildings, you can see the sky is very small, so the signal received by the satellite is small and weak. The low-orbit navigation enhancement system is to add another layer of low-orbit constellation below the Beidou constellation, and use the navigation enhancement system on the low-orbit satellite to achieve Beidou signal enhancement and broadcasting, thereby improving the strength of the signal and upgrading the original Beidou road-level positioning to lane-level positioning. Before we could know where people were, now I have to know whether you took your left foot or your right foot. "Kang Guohua said. Now Japan has a Quasi-Zenith satellite that does something similar, but they do it with GPS, and our team did it with our own Beidou.

　　In the future, the Beidou satellite navigation system will have a wide range of applications in land, sea, aerospace, mass consumption and other fields. "For example, in marine fisheries, the navigation of ships and the establishment of an integrated fishery information service network are inseparable from the positioning signal of the Beidou system." Wen Xin said that in the field of transportation, the application of advanced satellite navigation technology is an important means to realize the informatization and modernization of transportation, and is of great significance to the establishment of a smooth, efficient, safe and green modern transportation system. "

　　The reporter learned that the Beidou system has begun to be applied in many fields in our country. For example, the hydrological monitoring system based on the Beidou system has realized the real-time transmission of hydrological and water regime information, greatly improving the accuracy of rain, water regime, drought and disaster information collection and the timeliness of transmission. It has been widely used in southern Shaanxi, the Yangtze River Basin and the Yellow River Basin in our country, and the number of users has reached more than 4,000. "In the field of weather forecasting, after many years of meteorological digital message transmission application experiments, a series of meteorological forecast-type Beidou end point equipment and system application solutions developed by scientific researchers have solved the automatic transmission and collection of weather station digital messages and the visual display function of weather station map distribution by the National Meteorological Administration and meteorological centers in various cities. At present, the end point of Beidou application in the meteorological field has reached thousands of units. "

　　Microlink – "Beidou No. 3" Chief Engineer "Nanhangzao"

　　"Beidou-3" also has a cordial connection with Jiangsu. Its chief designer, Chen Zhonggui, is an 86-level alumnus of Nanjing University of Aeronautics and Astronautics.

　　"Look up at the starry sky, hold up the ambition to explore the universe. Work hard to realize the dream of a space power." On this year’s fifth "China Space Day" and the 50th anniversary of the successful launch of the "Dongfanghong No. 1" satellite, Chen Zhonggui sent an affectionate message to the students of his alma mater.

　　Chen Zhonggui has worked in the Aerospace Academy for 31 years after graduation, of which 20 years have been engaged in work related to Beidou. Beidou satellite navigation system has grown from nothing, from weak to strong, from regional to global, he has witnessed 80,000 Beidou people working day and night, painstaking research and dedication.

　　In December 2018, Chen Zhonggui returned to the campus of China Southern Airlines and brought a shocking open class on the ideology and politics of the alumni chief teacher "Beidou Navigation Satellite" to the students. Chen Zhonggui, who originally studied mining machinery as an undergraduate, quit his job after working for a few years out of yearning for his aerospace dream and chose to apply for the mathematical mechanics major of Nanjing Institute of Aeronautics and Astronautics (the predecessor of Nanjing University of Aeronautics and Astronautics), under the tutelage of Professor Zhu Ming, who is engaged in multi-body dynamics research.

　　"The study style of China Southern Airlines is very strict, especially the requirements of the professional basic courses are particularly high, and the exams are not ambiguous." This is what Chen Zhonggui remembered most when he was studying in graduate school. He still remembers the automatic control of this course, "The exam results are not satisfactory, and the teacher will talk to the students to help the students analyze the reasons, and draw inferences from one another." It is with such a rigorous study style and dedicated professional teachers that Chen Zhonggui made up for the gap in professional foundation in time during his graduate school, laying the foundation for the later work development.

　　Under the guidance of Mr. Zhu Ming, Chen Zhonggui aimed his graduate thesis at the new modeling theory of multi-body dynamics and the development of analytical software. During the writing of his graduate thesis, he had more opportunities to come into contact with the field of aerospace, and at that time, aerospace was most lacking in professionals engaged in basic disciplines such as dynamics and heat. It was this opportunity that Chen Zhonggui "naturally" formed a tacit connection with aerospace, and after graduation, he resolutely chose the Fifth Academy of Aerospace, a field he had pursued and loved.

　　In the open class for the students of China Southern Airlines, Chen Zhonggui comprehensively reviewed the development process of our country’s Beidou satellite navigation from No. 1 to No. 3, and systematically described the technical evolution and major innovation achievements of our country in the field of satellite navigation systems. Now the Beidou satellite navigation system has achieved 100% localization of stand-alone products that make up satellites, and all core components have been localized. It has become the fourth mature satellite navigation system after the US GPS, the Russian GLONASS system, and the European Galileo system.

　　Compared with Beidou-2, Beidou-3 requires more complete functions, more indicators, and higher reliability. How to achieve a leap in system performance in a short period of time is a severe challenge for the Beidou-3 demonstration team. Chen Zhonggui led the development team to check the data, build the standard, build the model, make the layout, and compile the plan, and finally formed a technical demonstration report that meets the different needs of all parties.

　　Looking to the future, he hopes to build a Beidou satellite navigation system that serves the world, is focused, distinctive, locally leading, and has a smooth transition, forming a more ubiquitous, more integrated, and more intelligent benchmark space-time system. Making China’s Beidou also the Beidou of the world is his unswerving career goal for satellite navigation, and it is also a solemn oath to our country’s aerospace power.

　　Intersection reporter, Yang Pinping

AITO ask the world M9 officially listed, panoramic wisdom flagship SUV price 469,800 yuan

On December 26th, the Q & A M9 and Huawei’s winter full-scene conference was grandly held in Shenzhen. The panoramic smart flagship SUV jointly built by Sailis Automobile and Huawei – AITO Q & A M9 was officially launched. The official guide price of the series models is: Extended Range Max Edition 469,800 yuan, Pure Electric Max Edition 509,800 yuan, Extended Range Ultra Edition 529,800 yuan, Pure Electric Ultra Edition 569,800 yuan.

The Q & J M9 is the culmination of the joint design and deep empowerment of Cyrus Automobile and Huawei. It is the peak product with the highest specification level so far in AITO Q & A, and will shake up the existing pattern with a flagship. At the press conference, Yu Chengdong, executive director of Huawei, CEO of end point BG and CEO of smart car solutions BU, said: "Q & A M9 will redefine the best smart flagship SUV within 10 million yuan, bringing users the ultimate new experience that is more than one generation ahead." He Liyang, president of Cyrus Automobile, said: "Cyrus Automobile is rapidly increasing production capacity and will make every effort to let users of the Q & A M9 experience the powerful charm of the best SUV within 10 million as soon as possible."

Leading smart aesthetics empowers dynamic travel

People-oriented, experience first. The Q-World M9 is built on a new luxury D-class platform and adopts a new design language. The skyline design and the suspended roof are used to show the appearance and full surface of the tourist. Through the ingenuity of many designs, such as the 3.1-meter-long pure flat side window, the aerodynamic performance of the whole vehicle is effectively improved, and the best 0.264Cd wind resistance (EV model) in the same class is achieved.

It is worth mentioning that the M9 is equipped with a leading generation of intelligent lighting system, HUAWEI XPIXEL Huawei million pixel intelligent projection headlight adopts the original double-reverse space optical system, ultra-near-field projection is more extreme, and the 3-meter ultra-near-field intelligent welcome function is realized; double lamp 2.60 million pixel fine lighting is safer; shading adaptive algorithm can be linked with ADS, precise shading makes light not disturbing; richer scene innovation, wide light blanket makes users safer in narrow road driving; 100-inch outdoor giant screen projection shares more happiness; intelligent interaction matrix headlight realizes thousands of cars and thousands of faces, so that cars have the ability to communicate independently for the first time; multi-scene intelligent lamp language is often new, which is the perfect integration of technology and humanities.

Leading variable space to meet the needs of all scenarios

The M9 is equipped with a leading generation of variable space, featuring the largest flat floor design in its class of 3.04 square meters, as well as the best ride space in the class of 2725mm, the largest one-row, two-row, and three-row space, with a higher room rate and support for 3, 4, 5, and 6-seat seat modes. The sense of vision, space, and flexibility are comparable to mainstream MPV models, easily meeting users’ full-scene travel needs.

Leading smart cockpit, creating a space intelligent benchmark

The ultimate form of the smart cockpit will be an intelligent mobile space. The Q-World M9 is equipped with a leading generation of smart space, and the whole car is fully equipped with 10 screens, creating a new benchmark for spatial intelligence. Huawei’s in-person head-up display system is on the bus for the first time, with the industry’s highest 2K resolution, the highest brightness and 75-inch imaging area. The integration of AR real scene and ADS display brings a more intuitive, safer and more immersive navigation experience. In addition, with the new integrated triple screen design, the 12.3-inch LCD instrument panel, 15.6-inch intelligent central control large screen, and 16-inch passenger entertainment screen are appropriately arranged, and with the new HarmonyOS 4 smart cockpit, through three-finger sliding, it is possible to easily achieve seamless circulation between multiple screens, the whole car and other entertainment experiences.

Leading hardcore security, creating an all-dimensional guard

Wenjie M9 is equipped with more than one generation of leading hardcore safety. In terms of passive safety, it is equipped with a super Xuanwu body and protects users through a Xuanwu architecture of eight horizontal and five vertical. 9,000 tons of integrated die-casting process, 12 2000MPa nuclear submarine-class thermoformed steel, 9 airbags ultra-high configuration, with the new Huawei "Giant Whale" 800V high-voltage battery platform, all-weather protection through cloud BMS battery management, escorting users every trip.

Security is the real luxury, privacy is the real dignity. Q & J M9 is taking active safety a step further. HUAWEI ADS 2.0 is not afraid of things and can avoid accidents, and has achieved the strongest AEB in history. In the face of stationary vehicles and pedestrians, the automatic braking speed can reach a maximum of 120km/h. The first ESA emergency steering assistance, automatic control steering to assist the driver to avoid collisions. The rear active safety ability is further enhanced, and the accidental stepping on the accelerator will also brake. It is worth mentioning that Q & J M9 also protects user privacy and security in an all-round way by face authentication & biological data out of the car, spatial data isolation of the main and auxiliary drivers, hiding incoming call notifications and automatic hiding of personal sensitive information.

Leading smart chassis, enjoy the journey with smart driving

Q Jie M9 is equipped with a leading generation of intelligent chassis, featuring a high-performance all-aluminum alloy chassis and an integrated aluminum alloy die-casting frame. It is equipped with a front 4-ball long double fork arm and a rear multi-link independent suspension. The whole system is equipped with intelligent closed air suspension and CDC variable damping shock absorber as standard. The height of the 5-speed body is adjustable, and the adjustment speed is increased by 30%. It guarantees the smooth body at all times, taking into account comfort and handling. Through HUAWEI ADS intelligent road sensing, iVSE intelligent vehicle state sensing, the new HUAWEI DATS dynamic adaptive torque system and HUAWEI xMotion intelligent body collaborative control system, the four major technologies are full-dimensional sensing, and 3D control intelligent coordination. In addition, Wenjie M9 won the "2023 China Top Ten Chassis" award in the "2023 China Top Ten Chassis Selection" hosted by the China Automotive Technology Research Center.

Leading intelligent manufacturing strength empowers high-quality product delivery

Before the launch of the M9, the number of reservations has exceeded 54,000 units. The pioneer program will be launched for early booking users, with a limited number of 2,000 places. Delivery will be launched on January 26, 2024, and large-scale delivery will be officially launched on February 26. This is due to the fact that Sailis Automobile has a smart factory built according to international leading standards and industrial Internet requirements. The factory has more than 1,000 intelligent devices, integrating advanced technologies such as AI vision and big data, which can realize 100% automation of key processes, 0.05mm hair-level blue light accuracy identification, more than 600 key point monitoring, and 100% quality monitoring and traceability. In addition, the factory is also the first to be equipped with a world-leading 9000T die-casting machine, achieving the highest degree of integration in integrated die-casting components; at the same time, it has also achieved the highest production efficiency in the world, with a new car being rolled off the assembly line every 30 seconds.

The launch of AITO Interview M9 will redefine the new standard of smart cars in many fields such as smart technology, smart space, smart security, and smart driving control, and bring users the ultimate new experience that is more than one generation ahead. Users can place an order through Huawei Mall, Huawei Authorized Experience Store, My Huawei APP, and User Center, and immediately place an order to enjoy an optional benefit worth 10,000 yuan.

Upstream news, Luo Xiaodi

Editor: Wang Xinyu, Editor in charge: Zheng Wei, Review: Zhao Lei

How the food delivery service industry entered the era of ＂standardization＂

　　Xinhua News Agency, Beijing, September 14: How the takeaway delivery service industry has entered the era of "standardization"

　　Xinhua News Agency reporters Wang Feng, Cao Yiming, Shao Kun

　　At present, the food delivery service market is developing rapidly, but on the other hand, the phenomenon of food delivery timeout, incomplete food, and uneven quality of food delivery personnel are also constantly exposed. Experts say that to solve the many problems existing in the food delivery industry, it is necessary to effectively manage and standardize all aspects of food delivery, so that it can truly enter the era of "standardization".

　　Takeaway delivery pain points attract "standard" attention

　　Recently, a news that "the delivery guy thinks the food is slow, and he cooks it by himself" has attracted the attention of netizens. Some netizens watched and praised it, but many people expressed their concerns about the safety of food delivered by takeout.

　　In recent years, with the accelerating pace of work and the deepening of Internet applications, takeaway delivery services such as food delivery have emerged and grown rapidly. According to a report released by iiMedia Consulting, the transaction volume of China’s takeaway market is expected to reach 2045.6 billion yuan in 2017.

　　However, at the same time, there are still blind spots in the supervision of the takeaway delivery industry, the lack of unified industry norms, and the rapid development of the industry have also brought many problems, leading to continuous consumer complaints.

　　Some industry insiders said that the current takeaway delivery industry threshold is not high, the quality of practitioners is uneven, the personal flow is relatively large, coupled with some enterprise management is not in place, many factors lead to food delivery timeout, incomplete food, poor health and safety conditions and other problems have occurred, similar to the "takeaway brother started cooking" case, naturally easy to attract consumer attention.

　　"At present, the food delivery service is still in the stage of’barbaric growth ‘. The pain points of the industry are the same for all food delivery companies. What the industry needs most at present is a unified standard," said Chen Xue, head of Meituan food delivery in southern China.

　　Some provisions of the preliminary "prescription" need to be improved

　　In fact, recognizing the importance of standards, leading industry companies have recently increased their efforts in this area.

　　Recently, the Commercial Industry Branch of the China Council for the Promotion of International Trade officially launched the "Takeaway Delivery Service Specification", which attracted widespread attention in the industry. For the first time, the "Specification" provides comprehensive and systematic regulations on the service organization requirements, service personnel, service processes, abnormal situation handling, service quality control and service quality improvement of takeaway delivery.

　　A person in charge of the public relations department of "Ele.me" said that "Ele.me" has also developed a set of corporate distribution standards, which have been updated to the fourth edition. The standard includes basic norms such as employment with health certificates, clothing, employee training management, and detailed rules such as preparation for departure, delivery, and conduct at customers.

　　"Meituan also released its own takeaway delivery standard not long ago." Chen Xue said that it is generally consistent with the "Specification" issued this time, and will further refer to the "Specification" to continuously improve the company’s standards.

　　In response to the launch of the "Specification", many industry insiders said that many of the content is launched for the actual problems of the current industry, which is of great reference to enterprises. But on the other hand, the specification is only a group standard, not a mandatory national standard, so it is difficult to fundamentally solve the many problems of takeaway delivery.

　　However, Jiao Min, a lawyer at Henan Guohou Law Firm, believes that the greatest significance of the launch of the "Norms" is not whether it is mandatory in itself, but in the comprehensive and systematic regulations on all aspects of takeaway distribution, such as stipulating that takeaway distribution institutions should have enterprise legal person qualifications; delivery personnel must be at least 18 years old, and delivery personnel should be subject to identity review. These contents have a good guiding effect on the healthy development of the industry.

　　He also said that the "Code" only provides a preliminary "prescription" for the current problems in the food delivery industry, and the content of many aspects is still rough and needs to be further refined.

　　Wang Dianming, a lawyer at Beijing Tongchuang Law Firm, also said that some provisions in the "Code" are still relatively vague and need to be further clarified. "For example, it is stipulated that food delivery staff cannot accept tips. At present, there is a function to reward food delivery staff on major food delivery platforms. The amount ranges from 1.1 yuan, and some platforms do not even cap it. Is this a tip?" Wang Dianming said.

　　Expect higher standards in the future

　　From the actual situation, most merchants in the takeaway delivery industry are currently enforcing their own rules and regulations, but a set of standards is not conducive to the long-term development of the takeaway delivery industry, and may also cause trouble to consumers.

　　Wan Ying, secretary general of China IoT E-commerce Logistics and Express Branch, introduced that the standards in our country can be roughly divided into four levels: group standards, local standards, industry standards, and national standards. Social groups can formulate group standards without national standards, industry standards, and local standards, and quickly respond to innovation and market demand for standards to fill the gaps in existing standards.

　　Some experts said that as a group standard, the "Code" can attract attention from all parties to the problem of takeaway delivery, and can also establish and promote internal self-discipline in the industry. But for the "Code" to be implemented, it must rely on the joint compliance of merchants, takeaway service companies and consumers.

　　Some industry insiders said that after the implementation of the "Standard", in a sense, it will guide both distribution companies and consumers. Consumers will choose distribution service companies according to the "Standard", and distribution companies that are difficult to "meet the standard" may face the pressure of being eliminated by the market.

　　Xu Yong, chief consultant of Express Logistics Information Network, said that with the further development of the takeaway distribution industry, it is urgent to establish more generally binding and enforceable industry standards or national standards to create conditions for the standardized development of the entire industry.

　　"After the launch of this" standard ", if it is tested by practice, it is indeed more scientific and has a certain degree of operability. It cannot be ruled out that after continuous improvement and national recognition, this standard will eventually form an industry standard or even become a national standard." Xu Yong said.