News on China's scientific and technological development.

56860

Senior Member
Registered Member
Please, Log in or Register to view URLs content!

Chinese students’ dream device defeats Japan’s most powerful supercomputer in world contest

  • DepGraph Supernode, started as a training project at Huazhong University of Science and Technology in Wuhan, was nearly twice as fast as nearest competitor
  • Secrecy of Chinese authorities regarding their large computers makes it difficult to accurately rank supercomputers from around the world, according to experts

A small computer developed by Chinese students outperformed Japan’s most powerful machine in solving a major complex data problem related to artificial intelligence, according to the latest global ranking.

Supercomputer Fugaku in Japan has nearly 4 million CPU cores, making it the second-largest computer ever built.

DepGraph Supernode, which was started as a “training project” by graduate students at Huazhong University of Science and Technology in Wuhan, has 128 cores.

But the DepGraph was nearly twice as fast as Fugaku in solving a single source shortest path (SSSP) problem, a difficult graph problem affecting the performance of artificial intelligence in a wide range of sectors, according to the annual Graph500 ranking released by the International Supercomputing Conference early this month.

“It felt like a dream,” first-year graduate student Shen Qiange said, according to a report by China Science Daily on Monday.

The average age of Shen and her teammates was 24.

Mathematicians often used graphs to describe relations. The simplest graph can contain just two dots with a line between them.

More complex graphs have been applied in many areas, such as financial markets with a large number of listed companies, global social media platforms or war games.

AI can detect hidden relations or discover a pattern of evolution in a sophisticated, constantly changing graph.

But the training and learning process usually involves a large number of calculations. Even some seemingly easy tasks, such as finding the shortest path between two dots, poses a huge challenge to computers.

The Wuhan team said they discovered a bottleneck issue that could severely affect computers on this type of job.

A supercomputer uses many CPU – central processing unit – cores to execute many calculation tasks simultaneously, according to a paper the team submitted to the IEEE Symposium on High-Performance Computer Architecture last year.

But when handling a graph-related problem, the calculation process in a core often depends on the outcome of another.

This dependency disrupted the calculation process, the paper said. Most of the time the cores had to either wait or re-do calculations with new results from another core.

The DepGraph machine solved the problem with a new structure and software that could take the performance of each core to the limit by reducing the chaos caused by dependency, the team said.

“Don’t underestimate the ability of students,” said Zhang Yu, associate professor of computer science and adviser to the project team.

“This is the first time a single computer defeated a cluster of computers in graph calculation,” he added.

Professor Jin Hai, a mentor to the students, said the young researchers had worked closely with China’s hi-tech companies. Their biggest inspirations came from the industry.

“The problem definitely originated from the industry. The research meets the most urgent needs of our country,” he was quoted by the China Science Daily as saying.

Zhao Jin, a PhD candidate and team leader, said they had to report their progress to Chinese tech giant Huawei Technologies every two weeks.

“Master’s and doctoral students can get access to the topics of the national key research and development plan. This opens our eyes instantly and integrates us more closely with the industry,” he said.

But Zhao said they also enjoyed a high degree of freedom.

“We find our research topic by ourselves. The supervisors do not tell the students what to do, but support us in the direction we are interested in. This is very stimulating,” he added.

Fugaku recorded top performance in breadth-first search (BFS), another major graph problem with an algorithm that was simpler but required more raw calculation resources to solve, according to the Graph500.

Sunway TaihuLight, a Chinese supercomputer built in 2015, ranked second in that category, with the DepGraph ranking ninth among the giant machines.

China has built some of the world’s largest computers, including some exascale machines that could rival the US Department of Energy’s Frontier, currently the fastest machine in open record.

Chinese researchers have conducted unprecedented experiments such as the world’s largest training for AI on these new machines, according to openly available information.

But the Chinese authorities have kept their performance secret.

The reliability of international ranking on supercomputers has been affected by China’s absence, according to industrial experts.

Imagine watching your nation pour its top scientists, resources and talents into developing a supercomputer, only to get ratio'd by a bunch of grad students. Brutal stuff. Japs on suicide watch.
 

Strangelove

Colonel
Registered Member
Please, Log in or Register to view URLs content!

Latest upgrades attest to China’s unrivalled prowess in high-speed railways

By GT staff reporters Published: Jun 20, 2022 11:52 PM
A bullet train departs from Wuhan, Central China's Hubei Province on June 20, 2022, the day when the Beijing-Wuhan section of the Beijing-Guangzhou high-speed link began operating at 350 kilometers per hour. Photo: cnsphoto

A bullet train departs from Wuhan, Central China's Hubei Province on June 20, 2022, the day when the Beijing-Wuhan section of the Beijing-Guangzhou high-speed link began operating at 350 kilometers per hour. Photo: cnsphoto

After making a round trip between Beijing and Central China's Zhengzhou nearly 700 kilometers apart in just a few hours,
Please, Log in or Register to view URLs content!
on a high-speed rail journey departing from Beijing on Monday became the newest witnesses to China's unrivalled prowess in high-speed rail travel.

The Monday upgrade that saw the country's railway operator increase train speeds to 350 kilometers per hour from a maximum of 310 kilometers an hour on a section of the Beijing-Guangzhou high-speed rail link added to China's collection of monumental rail achievements, together with two other major high-speed rail upgrades on the same day.

The latest improvements epitomize the country's meteoric rise in the high-speed rail world that has increasingly revolved around Made-in-China technologies and standards. An ever-growing list of top titles has seen China being catapulted from a latecomer into a trendsetter in the high-speed revolution that originated with Japan's Shinkansen.

Such feats have made China's global lead in high-speed rail the object of admiration, especially for the US whose high-speed dream has been hanging in the air for decades, experts said. They reckoned the modernization of the US rail network to be largely elusive for President Joe Biden, or "Amtrak Joe," one of the nicknames he's known by due to his avid advocating for funding for US national rail operator Amtrak.

In stark contrast, the continued headway China has made in upgrading its high-speed rail network, despite some hiccups over the years, has helped to boost its economy and creates development miracles, the experts continued.

Envied latecomer

The high-speed railway linking Beijing and Wuhan in Central China's Hubei Province en route Zhengzhou, a section of the Beijing-Guangzhou high-speed railway, began operation at a standard speed of 350 km/h from 310 km/h on Monday.

After a burst of acceleration, the train's speed reached over 350 km/h from less than 200 km/h in just a few minutes. The Global Times reporter who travels between Beijing and Central China's Zhengzhou section saw some passengers place water bottles upside down on their tray tables to test the stability of the high-speed train.

The entire journey to Wuhan of about 1200 km has now been shortened by around half an hour to a minimum of 3 hours and 48 minutes.

If US ambassador to China Nicholas Burns were to travel by high-speed rail again to Wuhan in the future, he would probably be even more impressed by its speed.

During a visit to Wuhan from Beijing earlier in June, Burns tweeted, "Just crossed the Yellow River in Henan at the rapid clip of 308km per hour on this impressive Fuxing train."

Also on Monday morning, a bullet train departed from Southwest China's Chongqing Municipality for Beijing via Henan, marking the full operation of the Zhengzhou-Chongqing high-speed railway.

Additionally, Beijing Fengtai Railway Station, the largest railway hub in Asia,
Please, Log in or Register to view URLs content!
on Monday. The reconstructed station has a total floor area of nearly 400,000 square meters, and will be able to accommodate a maximum of 14,000 passengers per hour.

The latest improvements build on the country's enviable rise to prominence in the global high-speed revolution.

China's high-speed rail network hit the 40,000-kilometer mark at the end of 2021, reaching out to 93 percent of domestic cities with a population of over 500,000, An Lusheng, deputy head of the National Railway Administration, disclosed earlier this month.

The numbers apparently consolidate the country's position as housing the world's largest high-speed rail network, although China's high-speed era only began on August 1, 2008 when the Beijing-Tianjin Inter-city Railway was put into operation at a top designed speed of 350 km/h.

Since then, China has reaped a growing number of top titles that have over the years cemented its global rail leadership.

In yet another sign, the Beijing-Zhangjiakou high-speed railway was launched at the end of 2019, the first railway of its kind to achieve autonomous driving at a speed of 350 km/h, solidifying China's top spot in high-speed rail technology.

Such achievements speak volumes about China's fast-track to high-speed rail leadership, despite some glitches over the past decade.

Design flaws and sloppy management were pinpointed as reasons behind a fatal bullet train crash near Wenzhou, East China's Zhejiang Province in July 2011, an official investigation found in late 2011.

In another setback, in 2013, former Railways Minister Liu Zhijun was given a suspended death sentence for accepting more than 64m yuan ($10m) in bribes over 25 years, notably, for awarding government rail contracts.

Sheng Guangzu, former secretary of the leading Party members group and general manager of the China Railway Corp, was revealed in March to be cooperating with an investigation by the country's top anti-graft body for suspected severe violations of discipline and laws.

These glitches did little to undercut China's unparalleled bullet train strength that has put the country's exports of high-speed rail technology and solutions in an advantageous position over early high-speed adopters such as Japan and some European countries, but has prompted the US to embark on an eager yet almost futile bullet train rush, observers said.

With high-speed rail becoming a calling card for the Chinese economy, the country's high-speed rail strength evidently goes far beyond its enabling of domestic connectivity, and has increasingly become a Chinese-origin edge in high-end manufacturing.

A typical example is the Jakarta-Bandung High-Speed Railway (HSR). With a design speed of 350 km/h, the HSR built with Chinese technology is set to cut the journey between Jakarta and Bandung, the capital of West Java province, from over three hours to about 40 minutes.

All this data stands in stark contrast to the US, which has been exploring high-speed rail transportation since the 1960s, around the time the first Japanese Shinkansen line was built, but has remained a laggard in making its vision a reality.

Even after Biden took office as US president, advancing the US high-speed rail push has remained rather elusive. Biden commuted via Amtrak during his decades in the Senate.

A multibillion-dollar infrastructure bill Biden signed into law late last year earmarked a small portion for transit and high-speed rail, but concerns remain that it will not be enough to modernize the country's aging passenger rail system, media reports said.

Infrastructure improvements in New Jersey would allow Amtrak's flagship high-speed service Acela trains to hit 241km/h per hour on a 25-km segment linking New Brunswick and South Brunswick, the railroad announced last week.

"I am not optimistic about the development of high-speed rail in the US. It is not because the US lacks the technology or funding, but because they don't realize the strategic significance of high-speed rail development for a country. On top of this, there are still many interest groups and lobby groups in the US that oppose the construction of high-speed rail," Tian Yun, a Beijing-based economist told the Global Times on Monday.

See link for rest of the article.
 

supercat

Major

Mark Zuckerberg will be copying China eventually. His version is just a gimmick compared what China is planning.

Please, Log in or Register to view URLs content!
Elon Musk: some people think TikTok is destroying civilizationo_O

The application of 5G technology in industry is as important as its application in telecommunications.
CATL equips most of its bases with 5G connectivity, covering over 5 million square meters
CATL has equipped seven of its global production sites with 5G connectivity and aims to extend it to all 10 sites in the future.
Please, Log in or Register to view URLs content!
 

Rettam Stacf

Junior Member
Registered Member
Elon Musk: some people think TikTok is destroying civilizationo_O

The application of 5G technology in industry is as important as its application in telecommunications.

Please, Log in or Register to view URLs content!

4G enabled and created a entire new consumer market.
5G is now enabling and creating an entire new segment of industrial applications.

4G started in the US.
5G started in China.

See the correlation ?
 

SanWenYu

Captain
Registered Member
Scientists from Harbin Institute of Technology made important breakthrough in creating "super black" coatings under room temporatures. Their products have been used in many Chinese satellites, including the series of Fengyun, Haiyang, Gaofen, etc. and many more commercial satellites.

Please, Log in or Register to view URLs content!

Please, Log in or Register to view URLs content!
哈尔滨6月21日电 (记者 史轶夫)哈尔滨工业大学21日发布消息,该校化工与化学学院吴晓宏教授团队在超黑涂层技术领域取得重要突破,团队攻克了超黑涂层常温制备技术瓶颈,得到了一种朗伯特性显著的高稳定超黑涂层。
吴晓宏教授团队的超黑涂层技术经第三方权威机构检测,宽光谱吸收高达99.8%,光线80°入射时总散射积分低至1.5%,可凝挥发物为0.00%。全面满足多种基体、复杂形面、超大面积实施工艺和空间极端环境应用需求,性能与技术成熟度均优于全球现役同类产品。

1.jpeg
 

FairAndUnbiased

Brigadier
Registered Member
Scientists from Harbin Institute of Technology made important breakthrough in creating "super black" coatings under room temporatures. Their products have been used in many Chinese satellites, including the series of Fengyun, Haiyang, Gaofen, etc. and many more commercial satellites.

Please, Log in or Register to view URLs content!




View attachment 91340
that looks like someone PSed an icon on the photo... wtf...
 
Top