News on China's scientific and technological development.


now noticed the tweet
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Beijing has built 4,300 5G base stations in the city's urban core areas and iconic buildings, citing the municipal communication bureau. By 2021, the city's core zones, including CBD, innovation centers, and economic-technological development area, will have
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network coverage
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now noticed the tweet
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Beijing Subway Line 6 begins to set different AC temperatures in its cars. Car #1 to #16 is strong breeze; car #17 to #32 is mild breeze. Passengers can choose which cars to get on as per their preference. What do you think?
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Hendrik_2000

Brigadier
Via Broadsword
10 min charging for 300 km: New LIB technology ready for production

Source: Xinhua| 2019-06-14 20:18:30|Editor: Xiang Bo

HANGZHOU, June 14 (Xinhua) -- Chinese researchers have developed a high-energy lithium-ion battery (LIB) technology, which could enable a running distance of 300 km per 10 minutes of charging.

The debut of a passenger car loaded with the 50-kWh battery pack was held in Hangzhou, eastern China's Zhejiang Province, on Tuesday.

"The key to this fast-charging technology is the R&D of fast lithium-ion conducting materials," said Zhou Xiaoping, professor of chemical engineering of Hunan University and chief scientist at Zhejiang Folta Technology Co. Ltd.

The materials mainly consist of low-impedance ionic compounds that could not only raise power cell efficiency but bring down safety risks caused by lithium precipitation during charging and discharging, Zhou added.

A third-party evaluation report issued by the independent testing company TUV SUD showed that the cycle life of the power cells using the new technology has hit 5,000 times in a 150-ampere charge-discharge performance test and is expected to exceed 6,000 times since the cycle testing continues.

Folta has also finished joint tests on the new LIB products with a Chinese automobile manufacturer and is ready for industrial production, the company said.

Industry insiders believe that the breakthrough in fast charging technology will help popularize pure electric vehicles by providing a shorter charging time, a smaller battery load in limited spaces and more safety.

"Folta has made further improvements and innovations on the existing technology," said Xu Dingming, deputy chief of the expert consultation committee of China's National Energy Commission. "Industrial production is the next step, which will give China's NEV and energy storage industry a hopeful nudge forward."

Xu noted that more tests still need to be done before this new technology could bring about a "fast-charging revolution" for the industry and thus speed up industrial transformation for green development.
 

FriedRiceNSpice

Senior Member
now noticed the tweet
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Beijing Subway Line 6 begins to set different AC temperatures in its cars. Car #1 to #16 is strong breeze; car #17 to #32 is mild breeze. Passengers can choose which cars to get on as per their preference. What do you think?
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New York subway have something similiar. Except cars either have AC on full blast or not all. And also whether or not a car has AC is randomized, you don't know which car has what until after you get on. At which point it becomes difficult in practice to get off and try another car.
 
Yesterday at 2:16 PM
Saturday at 5:46 PM
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little need to change my favorite chart
US retains its position as country with the fastest supercomputers in the world as China comes in second
  • Summit and Sierra, two IBM-built supercomputers, maintained their top positions for the US in the Top500 ranking
Updated: 12:38pm, 18 Jun, 2019
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The US has retained its top position as the producer of the fastest supercomputers in the world, with China still second after not introducing any new machines in recent months.

Summit and Sierra, two IBM-built supercomputers, maintained their top positions for the US, followed by two Chinese systems, the Sunway TaihuLight and the Tianhe-2A, which are installed in Wuxi and Guangzhou, respectively. Frontera, located at the University of Texas, is the only new supercomputer in the top 10, according to the latest Top500 list.

The ability to produce state-of-the-art supercomputers is an important metric of any nation’s technical prowess as they are widely deployed for tasks ranging from weather prediction, modelling ocean currents to energy technology and simulating nuclear explosions. Demand for supercomputing in commercial applications is also on the rise, driven by developments in artificial intelligence.

China is planning a multibillion-dollar investment to upgrade its supercomputer infrastructure to regain leadership after the US took top spot for the fastest supercomputer in 2018, ending China’s five-year dominance, the South China Morning Post reported in March, citing people familiar with the matter.

China is aiming for its newest Shuguang supercomputers to operate about 50 per cent faster than the current best US machine – the Summit – which if all goes to plan, should help China take the title back from the US in this year’s rankings of the world’s fastest machines, according to the Post report.

The Top500 list is released twice a year, once in June and again in November.

China and the US still dominate when it comes to the world’s fastest supercomputers, owning 43.8 per cent and 23.2 per cent of the top systems globally respectively, according to the latest Top500. This compares with the 45.4 per cent and 21.8 per cent owned by the two countries in the previous ranking, released seven months ago.

Japan ranks as the third-fastest in computing systems, owning a 5.8 per cent share.

In China, the Qingdao National Laboratory for Marine Science and Technology, the National Supercomputing Centre of Tianjin and National Supercomputing Centre in Shenzhen are expected to complete their upgrade to exascale computing machines in 2020, 2021 and 2022, respectively, as part of efforts by China for “continuous leadership” in supercomputing, the Post reported in March.
 

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