News on China's scientific and technological development.

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The Path to Petascale Computing in China

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Researchers from the R&D Center of Lubricating and Protecting Materials at the Lanzhou Institute of Chemical Physics (LICP) of the Chinese Academy of Sciences have fabricated a bonded graphite solid film lubricant with excellent high temperature lubricating and anti-wear properties which received a Chinese invention patent for the preparation technique on March 7.

The lubricant consists of polyamidoimide, graphite, molybdenum disulfide, rare earth fluoride, metal oxide, and mixed organic solvent. With its excellent high temperature lubricating and anti-wear properties, the lubricant can work at 250℃ for a long time. Moreover, the lubricant has abrasion resistance, thereby playing roles in protecting surface to reduce abrasion and friction coefficient, and prolonging service life of parts.

The lubricant can be used to prepare coatings with excellent high temperature lubricating and anti-wear properties. And these properties make it possible for the coatings to work under medium-high temperature lubricating environment. In this way, the coating can be used in rotors and endplates of air-conditioner compressors of which the running conditions involves high temperature, high load, high speed, special medium, etc, thereby improving the early running of rotors and endplates of air-conditioner compressors, reducing the damage to them and prolonging their service life.

 

[Preux]

I'm talking not about the above figures but the claim that --> 0.05 percent of the Chinese papers were published in top journals.

Using the 2010 data in the second article, it should come out to between 121,500/530,600 (i.e. 23%) to the figure 121500/(530600 + those papers that only published outside of China).

Edit: Why didn't the first article use the 2010 data (or even 2011)? Using the 2010 data, 530600/1.31B = 0.4 per 1000, which is already double of 2009.

I already addressed that. Without knowing what they mean by 'top' or 'major international' i.e. without methodology, you can't know which set of data they were using. The fact that their per capita output was correct suggests to me they did not pull this out of thin air.

 

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There are ways to clean heavy-metal-polluted soil, according scientists that attended a two-day forum in Beijing that ended Thursday.

A total of 300 soil scientists and ecology experts attended the 2012 Forum on Heavy Metal Soil Remediation and Ecological Restoration.

Chen Tongbin, researcher with Institute of Geographic Sciences and Natural Resources research under Chinese Academy of Sciences told Xinhua, "Heavy metals, different from organic pollutants, are non-biodegradable and can't be separated from the polluted soil."

"They can cause serious pollution to farmland and drinking water."

Chen's team is running a project to clean polluted soil in Guangxi Zhuang Autonomous Region by using the Chinese fern, Pteris vittata L that has a strong capacity to extract arsenic from the soil.

They also cultivated a dozen more pollution-extracting plants, called "hyper-accumulators" that can ensure "soil recovery with lower costs and lower risks of secondary pollution," said Chen.By inter-cropping with sugarcane and mulberry, Chen said his solution could bring a certain degree of profits for farmers.

Researchers from South China University of Technology have found new applications for maize straw aside from using it to make biomass energy.

"Agricultural castoff, like stalks, have many pores. It can be used to effectively absorb soil cadmium after modification," said Yang Chen, associate professor of environment sciences.

However, Wang Qi, a solid waste specialist from China Research Academy of Environmental Sciences, said the heavy metal cleansing was a systematic project, requiring a combination of technologies covering all industry process.

"A single technology can be promising, but the after-treatment is always neglected by enterprises. The material absorbed with heavy metals tend to be simply buried, causing some potential risks," said Wang.

Chen's brake fern project has taken heavy metals recovery into account. "The fern reaped are to be incinerated to solidify the arsenic that can be recycled into industrial materials," Chen said.

China's 12th Five-Year Plan on environmental protection has urged efforts to carry out the cleansing of heavy-metal-polluted soil.

"The growing public awareness and the national policy over heavy metals could also bring a considerable market potential in soil repair," Chen said.

 

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A Chinese electric locomotive manufacturer has delivered the electric traction system, the network control system and traction motor of electric bullet trains to Georgia, it was announced on Wednesday.

The delivery signaled that China has become an exporter of such core technology for the first time, according to a statement issued by the Zhuzhou Institute of China South Locomotive and Rolling Stock Corporation Ltd..

The company designed and produced the exported traction transmission system and the network control system, regarded as the "heart and brain" of electric multiple units (EMUs), or multi-car electric bullet trains.

The locomotives will be used in bullet trains travelling at a speed of 120 km per hour between Georgian cities in the mountainous Caucasus region, according to the statement.

The project contract was signed in August 2011, and the products for the EMU including the auxiliary traction inverter, the network control system, the braking resistance and traction motor have all been delivered.

 

[Quickie]

I already addressed that. Without knowing what they mean by 'top' or 'major international' i.e. without methodology, you can't know which set of data they were using. The fact that their per capita output was correct suggests to me they did not pull this out of thin air.

Obviously, the article is trying to confuse those 2 terms. Do you actually believe only 0.05 percent of Chinese papers go to the top journals while over 50 percent of those in UK and Switzerland go to the same "top journals"?

Some bit of calculation will tell that the "top journals" are actually major international journals. Like, in the case of the UK, 50% of 134000 is already 67000, which can't possibly fill in, let's say, the top 200 journals of, let's say, 20 papers each, which equals to a total of 4000 papers. That bit of maths simply tells you that the article's use of the term "top journals" is misleading and it should have used the terms "major international journals" instead.

 

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At 11:00 on May 18, 2012, the diode-pumped rubidium vapor laser device developed by The Department of High Power Gas Laser Technology of the Institute of Electronics, Chinese Academy of Sciences (IECAS) achieved laser output. Before this, only National University of Defense Technology achieved laser output of diode-pumped rubidium vapor laser in July 2011.

The diode-pumped rubidium vapor laser device is a diode-pumped alkali metallic laser device. The Diode Pumped Alkali Laser (DPAL) refers to the device that uses a semiconductor laser unit as the pumping source to pump the steam of alkali metals such as caesium (Cs), rubidium (Rb) and potassium (K) to generate laser. This type of laser device was put forward by the scientists in Lawrence Livermore of USA in 2003. It is a new type of optical pump gas laser device. It has combined the advantages such as small size and high efficiency of the semiconductor laser unit, high quality of laser beam of gas laser device and insignificant problem in thermal management. The quantum efficiency of the device is higher than 95% and the wavelength is at the atmospheric transmission window, which makes it suitable for long-distance transmission, particularly suitable for development into the orientation of high power. It has favorable prospect of application.

The diode-pumped rubidium vapor laser device with laser output in the IECAS uses a semiconductor laser of 780nm wavelength, 1ms pulse width and 100Hz recurrence frequency as the pumped light and uses optical grating narrowing technology to reduce the line width of the pumped light down to 0.2nm. Then the light is focalized and enters through the PBS into the rubidium steam chamber by incidence. The wavelength of the output rubidium steam laser is 795nm and its pulse power arrives 18mW, which makes it a linear polarization ground mode laser.

 

[Equation]

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I just hope they don't go to war against Russia again. That would endanger their new high speed rail system.

 

[bladerunner]

I just hope they don't go to war against Russia again. That would endanger their new high speed rail system.

They had the stuffing knocked out of them the last time, so they wont be in a hurry.

about the trains though, You might think Im knit picking here , but i think people are falling into the trap of classifying any "EMU" unit as a "High Speed Unit" I don't think they are, as the article says they have a speed of 120kph. For a comparison I have travelled in Diesel passenger locomotives that travelled at that and possibly over over that speed in the 1980's in the UKand they weren't regarded as HSR.

 

[broadsword]

They had the stuffing knocked out of them the last time, so they wont be in a hurry.

about the trains though, You might think Im knit picking here , but i think people are falling into the trap of classifying any "EMU" unit as a "High Speed Unit" I don't think they are, as the article says they have a speed of 120kph. For a comparison I have travelled in Diesel passenger locomotives that travelled at that and possibly over over that speed in the 1980's in the UKand they weren't regarded as HSR.

Yes. Blame the reporter. The central Asian countries are good market for China trains.