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Influence of manganese promoter on co-precipitated Fe-Cu based catalysts for higher alcohols synthesis 期刊论文  OAI收割
fuel, 2013, 卷号: 109, 页码: 21-27
作者:  
Ding, Mingyue;  Qiu, Minghuang;  Liu, Jianguo;  Li, Yuping;  Wang, Tiejun
收藏  |  浏览/下载:46/0  |  提交时间:2016/01/07
Advanced astigmatism-corrected tandem Wadsworth mounting for small-scale spectral broadband imaging spectrometer (EI CONFERENCE) 会议论文  OAI收割
作者:  
Lin G.-Y.
收藏  |  浏览/下载:38/0  |  提交时间:2013/03/25
Tandem gratings of double-dispersion mount make it possible to design an imaging spectrometer for the weak light observation with high spatial resolution  high spectral resolution  and high optical transmission efficiency. The traditional tandem Wadsworth mounting is originally designed to match the coaxial telescope and large-scale imaging spectrometer. When it is used to connect the off-axis telescope such as off-axis parabolic mirror  it presents lower imaging quality than to connect the coaxial telescope. It may also introduce interference among the detector and the optical elements as it is applied to the short focal length and small-scale spectrometer in a close volume by satellite. An advanced tandem Wadsworth mounting has been investigated to deal with the situation. The Wadsworth astigmatism-corrected mounting condition for which is expressed as the distance between the second concave grating and the imaging plane is calculated. Then the optimum arrangement for the first plane grating and the second concave grating  which make the anterior Wadsworth condition fulfilling each wavelength  is analyzed by the geometric and first order differential calculation. These two arrangements comprise the advanced Wadsworth mounting condition. The spectral resolution has also been calculated by these conditions. An example designed by the optimum theory proves that the advanced tandem Wadsworth mounting performs excellently in spectral broadband. 2012 Optical Society of America.  
Fabrication of high-efficiency ultraviolet blazed gratings by use of direct Ar2-CHF3 ion-beam etching through a rectangular photoresist mask (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
Tan X.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
In ultraviolet spectroscopy  groove irregularity and surface roughness of nanometer magnitude can cause a significant loss of diffraction efficiency. Therefore  there is a constant need to improve the diffraction efficiency. A blazed grating can concentrate most of the light intensity into a desired diffraction order  it is important to control the groove shape precisely  so it is the optimum choice among gratings of different kinds of profile. As the operating wavelength of most UV spectral applications is less than 200 nm  especially the blaze angle and the apical angle. We have presented a direct shaping method to fabricate EUV blazed gratings by using an ion-beam mixture of Ar+ and CHF2 +to etch K9 glass with a rectangular photoresist mask. With this method  the required blaze angle is small  we have succeeded in fabricating well-shaped UV blazed gratings with a 1200 line/mm groove density and 8.54 blaze angles and 1200 line/mm groove density and 11.68 blaze angles  and the metrical efficiency is about 81% and 78%. The good performance of the gratings was verified by diffraction efficiency measurements. When one uses the etching model  the conditions on the ion-beam grazing incident angle and the CHF3partial pressure should be noted. Besides  since the etched groove shape depends on the aspect ratio of the photoresist mask ridge  if we wish to fabricate larger gratings with this method  we must improve the uniformity of the photoresist mask before ion-beam etching. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
Effect of deposition rate on the DUV/VUV reflectance of MgF2 protected aluminum mirrors with e-beam evaporation (EI CONFERENCE) 会议论文  OAI收割
7th International Conference on Thin Film Physics and Applications, September 24, 2010 - September 27, 2010, Shanghai, China
作者:  
Wang T.-T.;  Gao J.-S.
收藏  |  浏览/下载:29/0  |  提交时间:2013/03/25
Equilibrium modeling for optimum design of operation parameters of MSW plasma gasification 会议论文  OAI收割
International Conference on Thermal Treatment Technologies and Hazardous Waste Combustors 2011, Jacksonville, FL, United states, MAY 10-13, 2011
作者:  
Wang GQ(王贵全);  Li YJ(李要建);  Xu YX(徐永香);  Sheng HZ(盛宏至);  Wang GQ(王贵全)
收藏  |  浏览/下载:48/0  |  提交时间:2013/02/26
Combustion  Combustors  Hazardous materials  Heat treatment  Heating  Moisture  Moisture determination  Municipal solid waste  Plasma jets  Plasma torches  Plasmas  Synthesis gas  Technology  Waste treatment  Chinese Academy of Sciences  Concentration distributions  Constraint conditions  Duration time  Environmentally-friendly technology  Equilibrium modeling  Equilibrium models  Excess air ratios  Feeding rate  Gasification process  Gasification temperatures  Gasifiers  Heating value  High temperature  Low emission  MSW  Operating parameters  Operation parameters  Optimum designs  Plasma gasification  Process parameters  Product distributions  Simulation  State of the art  Syn-gas  Volume reductions  Working parameters  
3R intersection target positioning in real time based on distance (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Nengwei W.; Juan C.; Jian C.
收藏  |  浏览/下载:13/0  |  提交时间:2013/03/25
The positioning error based on angle  angle-distance or single station positioning increases with the distance increasing. 3R target positioning based on distance can obtain the high precision measurements in long distance. Here we give the 3R model for the intersection positioning  provide the two necessary conditions for getting the optimum intersection point. The experimental results show that the intersection precision based on angle is over 2m and will degrade greatly with the increasing of distance while the one based on 3R model will improve and the error decrease gradually. That the precision of the distance measurement is about 1m means the 3R model is better than the angle positioning  which can compensate the drawbacks of the angle positioning at short distance. 2010 IEEE.  
Determination of optimum operating conditions for production of polyhydroxybutyrate by activated sludge submitted to dynamic feeding regime 期刊论文  OAI收割
CHINESE SCIENCE BULLETIN, 2009, 卷号: 54, 期号: 1, 页码: 142-149
Qu Bo; Liu JunXin
收藏  |  浏览/下载:20/0  |  提交时间:2015/08/13
Support technique of ultra thin mirror in space optics (EI CONFERENCE) 会议论文  OAI收割
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 2, 2005 - November 5, 2005, Xian, China
作者:  
Ren J.-Y.;  Gao M.-H.
收藏  |  浏览/下载:34/0  |  提交时间:2013/03/25
With the development of space optical system  the technique of ultra thin mirror come forth and is paid more attention because of less difficulty in machining  low cost  lightweight  no disassembly during detecting and maintaining. The key technique takes advantage of deformation of ultra thin mirror as the influence of environment to adjust the surface figure. Its accuracy meets requirement. An analysis method is based on finite element analysis (FEA)  and many items  including the amount of support points  the way of arrangement  the optimum design of support component are studied. The finite element method was used to analyze the mirror and some different mirror support schemes. The principal aim of the mirror analysis is to get numbers of support points and the ways of the support. There are three schemes including 12-6-1  12-8-1 and 16-8-1 models. Deformation of deadweight is calculated under the three conditions. The way of 16-8-1 is more suitable than the designs of other two. The support subassembly is amended to meet with the mirror surface RMS in the range of 30m. Deformation of the mirror with support structure has been calculated. The result is 16.52nm  lower than a quarter of the wavelength  which indicates the feasibility of the support scheme applied to mirror. Theoretical result for the best way of support is presented. The result of analysis shows that requirement surface figure could be met through adjusting support points. It predicts feasibility of the support technique and provides theoretical value for active adjustment in the laboratory. At present  support and adjusting experiment of ultra thin mirror is being carried on.  
Effect of calcium ions on pitting corrosion and inhibition performance in CO2 corrosion of N80 steel 期刊论文  OAI收割
Corrosion Science, 2006, 卷号: 48, 期号: 10, 页码: 3091-3108
X. Jiang; Y. G. Zheng; D. R. Qu; W. Ke
收藏  |  浏览/下载:28/0  |  提交时间:2012/04/13