News on China's scientific and technological development.

Preux

Junior Member
Not so much misrepresentation as different perspectives. The first article looks at the total number of papers and the relatively low portion of highly cited papers. The second looks at the trend and the rising number of highly cited papers in absolute terms. Both would be correct with its own baggage.

Data is data, we just gotta learn to strip the superfluous window dressing and get at the core.
 

Quickie

Colonel
Not so much misrepresentation as different perspectives. The first article looks at the total number of papers and the relatively low portion of highly cited papers. The second looks at the trend and the rising number of highly cited papers in absolute terms. Both would be correct with its own baggage.

Data is data, we just gotta learn to strip the superfluous window dressing and get at the core.

The problem is the author failed in his maths terribly when he tried to come out with the figures using the data. Period.
 

escobar

Brigadier
Please, Log in or Register to view URLs content!


vsyn9.jpg

kkEfB.jpg

Jaesz.jpg


The helium refrigerator of the cryogenic system for Steady-state High Magnetic Field Facility (SHMFF), which is one of the National Grant Science and Technology Infrastructure Project of the 11th Five-Year Plan undertook by CHMFL, was put into regular operation on Mar. 20th, 2012, after two weeks of trial operation.

All parameters of the system meet the specifications or exceed the designed technical requirements. The cooling capacity reaches 380 Watts at 4.5 K in refrigeration mode, and produce 130.8 Liters liquid Helium per hour in liquefaction mode, which exceeds the original designed technical requirements (360 Watts @ 4.5 K in refrigeration mode, or 110 Liters per hour in liquefaction mode). This marks the Cryogenic System has been constructed successfully in High Magnetic Field Laboratory Chinese Academy of Sciences (CHMFL).

Cryogenic System consists of helium refrigerator, compressor, storage tanks, recovery system, purification system. The Helium Refrigerator is a vital component of the cryogenic system, which will supply supercritical helium to cool down the 40-T hybrid superconducting magnet outsert and other superconducting magnets. The Installation and construction of the Cryogenic System for SHMFF started in May 2011.

Scientists of cryogenic group in CHMFL and the France engineers from Air Liquide Company has been worked jointly for several months and worked out many technical challenges including facility in-position, piping, cabling and leakage detecting etc. The successful operation of the CHMFL Cryogenic System, not only provides an important technical support to SHMFF, but builds an experienced cryogenic supporting team in CHMFL.
 

escobar

Brigadier
Please, Log in or Register to view URLs content!


A Chinese traditional medicine has been authorized for sale in a European market for the first time, the Chinese Academy of Sciences announced on Wednesday.

Industry experts said the approval would lead the way for Chinese traditional medicine to enter the mainstream European market.

Di'ao Xin Xue Kang, a well-known herbal medicine produced by the Chengdu-based Di'ao Group, received marketing authorization from the Medicines Evaluation Board of the Netherlands, making it the first Chinese traditional drug to be identified as a therapeutic medicine in the European Union.

"This is an important step for TCM to enter mainstream markets of developed countries," Health Minister Chen Zhu said at a news conference organized by the Chinese Academy of Sciences in Beijing on Wednesday.

This first success was "proof that Chinese firms are capable of producing top-level medicines", he said.

Bai Chunli, president of Chinese Academy of Sciences, urged TCM research institutions to increase their focus on the European market now.

"As well as strengthening research, I hope they can also study the authorization requirements of different countries, so that more and more medicines will have access to the high-end market," he said.

Sang Guowei, vice-chairman of the Standing Committee of the National People's Congress, said that TCM could finally enter European "rightfully".

The certification of Di'ao Xin Xue Kang follows an EU ban on traditional Chinese medicine in May 2011, imposed to prevent unlicensed herbal medicines being sold as food supplements.


"This new authorization marks the first time that Chinese traditional medicine steps into the mainstream health market," said Zhang Boli, a member of the Chinese Academy of Engineering and president of the China Academy of Chinese Medical Sciences.

Zhang said another seven or eight Chinese TCM firms were trying to get access to the EU market.

"Maybe one or two of them will receive authorization next year. And this may lead to more applicants, as the influence of TCM expands on international market," he added.

Earlier reports said that the Guangzhou Qixing Pharmaceutical Company, the Foci Pharmaceutical Company in Lanzhou, and Tongrentang in Beijing are also striving for the EU market.

"The medicine is also the first herbal medicine that has entered the EU market from a country outside the EU member states," said Li Bogang, president of the Di'ao Group.

Li said the group took six years to obtain the certification from the Netherlands, although the medicine has been sold in China since 1988.

The group carried out two years of research on active substances in TCM drugs with the help of the Netherlands Organization for Applied Scientific Research. "Without the help of the research organization, the application could have taken longer,"
Li said.

"Di'ao Xin Xue Kang contains only a single portion of traditional medicine, which makes the research much easier than for a compound medicine, so we decided to use it in our first attempt at the EU market."

Chen Keji, a member of the Chinese Academy of Sciences and chairman of the Chinese Association of Integrative Medicine, said identifying the active substances is essential when applying to enter the EU market.

"In China, we currently do not have so strict requirements on the study of active substances, especially in compound medicines," Chen said. "For example, a TCM doctor may add or take out some herbs in prescriptions for different patients."

"However, the healing principle is similar in TCM and Western medicine, so it's best we find out the effective parts in all medicines."

Liu Jun, chief engineer of the research department of Guangzhou Qixing Pharmaceutical Company, said the basic research into active substances started in 2011, and will take at least another year to finish.

"We are likely to promote our Xiaoyaowan and Biyanpian medicines next. Both are compound medicines," Liu said. "Compared with Di'ao Xin Xue Kang, the compound medicine is more complicated, so it takes time."
 

Preux

Junior Member
The problem is the author failed in his maths terribly when he tried to come out with the figures using the data. Period.

Except he didn't. The maths is correct. You may quibble about the data but 2.85E5/1.3E6 does come out 0.2 and 4.73E5/3E5 does come out 1.6. Run it through the calculator if you don't believe me.

The problem is the methodology, which neither source is exactly very clear about, i.e. what constitutes a 'top journal' or 'major international journal'. But that's what you get when you read articles intended for mass consumption as opposed to a rigorous academic article.
 

escobar

Brigadier
Please, Log in or Register to view URLs content!


High-performance structural ceramics possess many excellent properties, such as high temperature resistance, wear resistance, anti-corrosion, high strength and anti-oxidation. They are considered to be potential candidates for high-temperature tribological applications. High temperature ceramics should be low density structural materials which can work under 1000℃ and possess high strength and anti-corrosion properties. At present, the intrinsic embrittlement and decrease in mechanical properties resulted from tribological design of ceramic materials have limited the application of ceramic materials in lubrication under high temperature.

Starting from micro/nano composite materials, the researchers at the Lanzhou Institute of Chemical Physics (LICP) of the Chinese Academy of Sciences (CAS) have successfully prepared Al2O3/Mo composites with laminated structure by applying the design principle of bionic composites.

The composites consist of a weak interfacial layer of molybdenum with thickness of 65 m, which results in high fracture toughness and low friction coefficient. The bending strength of the material reached the properties similar to those of general monolithic Al2O3 ceramics, and the fracture toughness is 1.6 times higher. The friction coefficient of the material can be reduced by approximately 62.6% below than that of the monolithic Al2O3 ceramics to 0.34 at 800℃. The lowest friction coefficient values of 0.25 can be reached at 800℃, 70 N, and 5 Hz.

The Al2O3/Mo composite gained good self lubricating performance, which can be attributed to the presence of weak interfacial layer and the formation of MoO3 during the sliding friction at high temperature. These excellent tribological and mechanical properties enable it to have numerous potential applications in high technology as a structural material.

The work has received support from National Basic Research Program of China (973 Program), National Natural Science Foundation of China, Western Light Program of the Chinese Academy of Sciences.

The findings have been published in Wear (Wear 2012, 280-281: 1-4).
 

Quickie

Colonel
Except he didn't. The maths is correct. You may quibble about the data but 2.85E5/1.3E6 does come out 0.2 and 4.73E5/3E5 does come out 1.6. Run it through the calculator if you don't believe me.

The problem is the methodology, which neither source is exactly very clear about, i.e. what constitutes a 'top journal' or 'major international journal'. But that's what you get when you read articles intended for mass consumption as opposed to a rigorous academic article.

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.
 
Last edited:

escobar

Brigadier
Please, Log in or Register to view URLs content!


As being widely used in environmental monitoring, medical diagnostics and IR countermeasurement, mid-infrared laser sources at the wavelength region of 3 to 5 micron have been an object of growing scientific interest. Extensive works and a lot of methods have been developed to study and achieve mid-infrared laser with high power and efficiency.

Researchers at Key Laboratory of Space Laser Communication and Testing Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science (SIOM) demonstrate a high-efficiency 1.9 µm laser-pumped nonlinear crystal optical parametric oscillator, which generate laser emission at ~3.8 µm, for the first time.

The Thulium-doped Lithium Yttrium Fluoride (Tm:YLF) crystal is grown and fabricated by Key Laboratory of Materials for High Power Laser, SIOM. Effectively stabilize and narrow the spectral of Tm:YLF laser to eliminate vibrational-rotational absorption of water molecules by inserting and rotating two Febry–Pérot etalon with probable thickness is realised. The nonlinear crystal is Periodically Poled MgO-doped Congruent LiNbO3, together with the Tm:YLF laser as the pump source, both signal and idler waves are approximately 3.8 µm, showing the lowest atmospheric attenuation of mid-IR radiation. The absorption of PPLN at a wavelength longer than 4.1 µm is also avoided with this configuration. At room temperature, A 900 mW mid-infrared emission generated from an OPO is illustrated. The overall mid-infrared generation conversion efficiency reaches 31%, whereas the slope efficiency is up to 70%.

This work entitled "Tm:YLF laser-pumped periodically poled MgO-doped congruent LiNbO3 crystal optical parametric oscillators" has been published in Optics Letters, Vol. 37, Issue 4, pp. 743-745 (2012),
Please, Log in or Register to view URLs content!
.
 

escobar

Brigadier
Please, Log in or Register to view URLs content!


China spent $286 million on cloud-computing infrastructure last year, and the amount will increase to more than $1 billion in 2016, the research company IDC said on Tuesday.

China, where cloud computing is one the fastest-growing industries, accounted for around 10 percent of global cloud-computing investment last year, which totaled $28 billion, according to IDC. Kitty Fok, vice-president of IDC Asia-Pacific, said that China's IT market is expected to have a volume of $163.2 billion this year, accounting for 7.6 percent of the global total.

The Ministry of Industry and Information Technology, along with other national departments, announced outlines on developing the country's cloud-computing services through pilot and demonstration cities and regions last year.

China already has five pilot cloud-computing cities - Beijing, Shanghai, Shenzhen, Hangzhou and Wuxi, said Wu Lianfeng, associate vice-president at IDC China.

Most public cloud projects will be promoted by the Chinese government.
A National Cloud Computing Industry Development Plan was recently approved by the central government and will be released soon.

China's first health-related cloud was established in March last year by Shanghai's Shibei Hospital, while the Qingdao municipal government built its first cloud-computing platform for e-government affairs with the software company Inspur Corp.


According to the country's 12th Five-Year Plan (2011-15), cloud computing will be a chief driver of the IT industry and the development of e-government in China.

Wu said that apart from the five pilot cities, 8 provinces and cities have also announced cloud computing strategies and plans. If all of these plans are implemented, China will have more than 10 million cloud-computing servers worth a total investment of $270 billion.

However, industry experts are concerned that excessive construction and the lack of a solid plan for the application of cloud-computing technology may result in a massive waste of resources.

According to IDC's latest survey, only about 30 percent of companies and organizations could provide detailed plans of what kind of applications they will put in clouds.

"Governments and enterprises should avoid over-investment and have detailed plans before they spend money,
" said Thomas Zhou, a senior research manager at IDC China.
 
Last edited:

escobar

Brigadier
Please, Log in or Register to view URLs content!


Microfluidics is a rapidly emerging technology that enables miniaturization and integration for biological, chemical, and medical applications. The fluid mixing is an essential function required by most microfluidic systems, however, fast and efficient fluid mixing inside microchannels is usually difficult to achieve due to the laminar nature of microflows characterized by low Reynolds numbers. Recently, various passive mixers have been developed to achieve efficient mixing by utilizing three-dimensional (3D) geometric structures to induce disturbance in the fluids. Nevertheless, the fabrication of 3D microfluidic structures with arbitrary geometries is still challenging if not impossible, because today’s mainstream microfluidic fabrication techniques rely heavily on the well-established 2D planar lithographic approach.

Researchers at State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (SIOM) developed a new technique to fabricate microchannels in glass with nearly unlimited lengths and with arbitrary geometries. The main fabrication process includes two steps: (1) direct formation of hollow microchannels in a mesoporous glass substrate immersed in water by femtosecond laser ablation; and (2) postannealing of the glass substrate at 1150℃. This consolidates the nanoscale pores by causing them to collapse. However, the fabricated microchannels survive due to their larger size. Based on this newly established technique, a passive microfluidic mixer consisted of geometrically complex 3D microchannels was demonstrated. The superior mixing efficiency of the 3D mixer is also confirmed by numerical simulations as well as mixing experiments, as shown in Figures 1b and 1c, respectively.

The dimensions of channel can be easily changed by controlling the machining parameters, such as the numerical aperture of objective, the laser pulse energy and the translation speed. To show this capability, a 3D microfluidic lantern composed of 3D microchannels with different sizes was fabricated by this technique.
When either fluorescein sodium solution or Rhodamine B solution was injected into the microchannel and excited by a laser operated at 490nm or 540nm wavelengths, the lantern produced either green or red colors, as shown in Figures 1d and 1e, respectively.

The technique is promising for a broad spectrum of microfluidic applications based on compact and complex 3D microfluidic networks in the future.

This work is supported by National Basic Research Program of China and National Natural Science Foundation of China
The result of this work has been published on LabChip. 2012, 12, 746–749. and reported in SPIE Newsroom, DOI
 
Top