News on China's scientific and technological development.

taxiya

Brigadier
Registered Member
Accelerator is definitely a CPU ... work together with main CPU. HP Accelerator is harder to design and much more expensive .. thats why the US ban the sale to China
If you removed the bold texts, you would have been right.

In broad sense, all CPU, co-processor, GPU (accelerator) and DSP are the same, having a calculating (add, subtract etc.) registers that read, calculate and write back from a memory bus. So one can call all of them Processor Unit.

However, in a strict sense within computer industry, they are differentiated on purpose. Accelerator is commonly used as alternative term for GPU for graphical processing acceleration. It is a Processor Unit for sure. But one can not call it CPU because C is Central which is reserved for the Processor Unit that sit on top of the architecture. CPU is the one whole control other PUs such as Co-Processor and GPUs, which the later two never do this task. Another distinction is OS instructions are executed on CPU only. CPU will decide whether to send certain instructions to Co-Processor and GPU or not. CPU can do these work on its own abide slower, but the other two can't do everything CPU can do.

BTW, GPU (accelerator) is a specialized Co-Processor whose early role in the 1990s were offloading mathematical calculation from CPU. Later on GPU showed up to offload the graphical tasks. So GPU is equal in architecture to the Phi chip, not to any CPU.
 

Figaro

Senior Member
Registered Member
Fuxing power-saving bullet train ...
China’s latest high-speed train consumes only 3.8 KWh per 100 passenger-km
By Sun Wenyu (
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) 16:40, September 29, 2017

China’s latest high-speed train the Fuxing consumes only 3.8 KWh per 100 passenger-km when running at a speed of 350 km/h, according to Chinese newspaper Science and Technology Daily.

Fuxing bullet trains officially started operating at 350 km/h since Sept. 21, which has made China to reclaim its crown for the world’s fastest train service.

The height of the Fuxing model CR400AF increased to 4.05 meters from 3.7 meters, expanding its section by 7.3%.

The enlarged locomotive calls for improved aerodynamic performance. In order to achieve this, the design team conducted lots of simulated calculations, wind tunnel tests, and moving model tests, said Ding Sansan, deputy chief-engineer of CSR Qingdao Sifang Co., Ltd., the producer of the locomotive.

After multiple technical evaluations, the final scheme was chosen out of 46 preliminary conceptual plans.

Compared with older versions of China’s high-speed trains, the Fuxing has 12% lower air resistance and 17% of the energy consumption per 100 km.

It saves more than 5,000 KWh of electricity for a round trip between Beijing and Shanghai, Ding noted.

In addition, a number of sensing systems have been added to the train, empowering it with a smarter brain.

The 2,500 sensors can sample more than 1,500 kinds of information, including vibration, bearing temperature, traction system, and carriage environment, said Tao Guidong, deputy director of technical center of CSR Qingdao Sifang Co., Ltd.

The smart high-precision sensing systems are able to sample one million pieces of data in just one second, Tao added.

The Fuxing bullet train has also applied passive safety technology for the first time. The technology, which uses energy absorption devices, guarantees the non-deformation of passenger in the event of a crash, Ding noted.
 

taxiya

Brigadier
Registered Member
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Beijing-Shanghai quantum communication trunk line officially inaugurated.
  • Project got go-ahead in 2013
  • Construction lasted 42 months.
  • Nodes and satellite connected by the end of 2016.
  • Acceptance completed at the end of August 2017.
  • Video conference among cities, Beijing, Hefei, Jinan, Shanghai and Urumqi. 1000km apart.
  • Video conference between Beijing and Vienna via Mozi sattelite. Close to 7500km apart.
  • Encryption key exchange rate is more than 20kps among nodes along the trunk line (fiber cable).
  • Encryption key exchange rate is more than 5kps between Beijing node and the (satellite) ground station implying the highest rate between Beijing and Vienna, Beijing and Urumqi.
  • The presidents of Chinese Science Academy (Bai Chuli) and Austrian Science Academy (Anton Zeilinger) congratulated and reaffirmed the desires of further cooperation in the field between the two countries.
  • BOCOM and ICBC have been conducting realtime trading exchange.
Important note, the encryption key exchange rate is the speed to transfer encryption key (quantum bit), it is not to be confused with the pay load rate which is the bit rate of voice, video and data and much higher.
 

Yvrch

Junior Member
Registered Member
Imagine that little thing has opposable thumbs. It could cook my dinner, make my espresso, walk my dog and so many other things in between.

This century could as well be the last one for humans as we know them. Humans could evolve into some kind of bio machine hybrid so as to control and command these robots every waking hours of our life.
 
now I read
China develops technology to recognize people by posture only
Xinhua| 2017-10-02 15:22:46
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Chinese researchers have developed new technology that can recognize people by their posture within a distance of 50 meters.

Researchers at the Chinese Academy of Sciences institute of automation believe the technology determine people's identity even if they just walk randomly with their back to the camera.

Huang Yongzhen, one of the researchers, said the technology could count as many as 1,000 people at an area as big as 1,000 square meters at a distance of 100 meters.

The technology could be used extensively in security systems, public transportation and business venues, Huang said.

China is in a world leader in posture recognition technology, according to the institute.
 

In4ser

Junior Member
Really? They have to make it look exactly like a spider? That is nightmare fueled stuff.
Spiders a very adaptable there's millions of them floating in web balloons thousands of miles in the sky and hundreds more living air bubbles underwater
 

Hendrik_2000

Lieutenant General
China nuclear energy and coal company partner to make traveling wave nuclear reactor
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At a ceremony on Tuesday, the two sides signed an investment agreement to promote fourth-generation traveling wave reactors (TWR), CNNC said in a notice posted on its website. The deal also involved the Zhejiang Energy Group and the Hebei Construction and Investment Group.

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with a capital of CNY1bn ( $153.2m).

TWR, one of several new “fourth-generation” reactor designs, uses depleted uranium and is more fuel-efficient and cheaper to run than conventional nuclear reactors.

Leading developers of TWR include the Bill Gates-backed Terrapower, which is working on large scale projects aimed at providing base-load electricity. CNNC said its chairman, Wang Shoujun, met with Gates in July to discuss cooperation.

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which later came to be called a “traveling-wave reactor”. TerraPower has developed TWR designs for low- to medium- (300 MWe) as well as high-power (~1000 MWe) generation facilities. Bill Gates featured TerraPower in his 2010 TED talk.

In 2010 a group from TerraPower applied for patent EP 2324480 A1 following WO2010019199A1 “Heat pipe nuclear fission deflagration wave reactor cooling”. The application was deemed withdrawn in 2014.

In September, 2015 TerraPower and China National Nuclear Corporation (CNNC) signed a memorandum of understanding to jointly develop a TWR. TerraPower plans to build a 600 MWe demonstration Plant, the TWR-P, by 2018–2022 followed by larger commercial plants of 1150 MWe in the late 2020s

CNNC said the technology uses 30 percent to 40 percent of the isotopes in natural uranium, compared with just 0.7 percent in conventional models, and reactors could run for decades without requiring additional fuel.

CNNC and its rival China General Nuclear are both developing small modular reactors that can be deployed in remote regions as well as mobile ship-mounted units that can be used to supply power to offshore drilling platforms or small islands.

Shenhua, which is in the middle of a merger with state power giant Guodian, is seeking to diversify away from coal and coal-fired power, and it has already been in talks with CNNC and CGN to invest in nuclear projects.
 
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