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浏览/检索结果: 共15条，第1-10条 帮助

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中国主要大气污染物的时空分布特征研究 中文期刊论文  OAI收割
2015
作者:  臧星华;  鲁垠涛;  姚宏;  李发东;  张士超
收藏  |  浏览/下载：71/0  |  提交时间：2015/12/18
NO2  PM10  PM2.5  SO2  采暖期  
Search for heavy neutrinos at Belle 期刊论文  OAI收割
PHYSICAL REVIEW D, 2013, 卷号: 87, 期号: 7
作者:  Belle Collaboration
收藏  |  浏览/下载：17/0  |  提交时间：2015/12/02
Stray light analysis of solar photoelectric detection system on space target (EI CONFERENCE) 会议论文  OAI收割
2012 International Conference on Intelligent System and Applied Material, GSAM 2012, January 13, 2012 - January 15, 2012, Taiyuan, Shanxi, China
Li L.-Y.; Wang Y.-F.; San X.-G.
收藏  |  浏览/下载：140/0  |  提交时间：2013/03/25
Most conventional spacious solar photoelectric detection systems suffer from unexpected stray light. This paper demonstrates the effects on photoelectric detection system bring out by stray light. On this foundation  build up evaluation index of stray light system  to search the reasonable programme to eliminating stray light. A detailed telescope system geometry model was created  and scatter models were create for telescope and enclosure components. By the means of designing the structure of main baffle  baffle vane and the coating technology. In order to verify the prosperity of structure that designed  we utilizes software to analysis opto-mechanical model. we utilizes software to analysis opto-mechanical model. The simulations show that point source transmittance of the system is thus reduced by up to two orders of magnitude between 10-8 and 10-10. Meanwhile  the experiment obtains clean detection data which satisfies the system requirements. Stray light has been suppressed effectually  and so measurement precision was improved from detection graphics. (2012) Trans Tech Publications.  
Design of the real-time autofocusing system for collimator with long focus length and large aperture (EI CONFERENCE) 会议论文  OAI收割
2011 International Academic Conference on Numbers, Intelligence, Manufacturing Technology and Machinery Automation, MAMT 2011, December 24, 2011 - December 25, 2011, Wuhan, China
作者:  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：40/0  |  提交时间：2013/03/25
Large aperture collimator which has been widely used for calibrating and testing various optical devices plays an essential role in correlative laboratories. As being the basic testing and calibration equipment  the large aperture collimator's accuracy should be much higher than the device under testing in order to ensure the accuracy of the measurement. However  the process of adjusting the collimator is extremely complicated due to the collimator's large aperture and long focal length. So it is difficult to ensure the measurement's quality and easy to cause the system being vulnerable to the surrounding environment. One of the most common problems is defocus. In order to solve the problem above  this issue presents a new type of autocollimator autofocusing system which uses pentaprism instead of using large-aperture plane mirror  semiconductor lasers as light source and CCD sensor as receiver. The system is smaller  lighter  and more convenient when using. The computer simulation shows that the autofocusing system's resolution could reach the accuracy of 40m. If we use the relevant algorithms to execute the sub-pixel scanning  the resolution could reach the accuracy of 10m. It shows that the system could satisfy the required testing precision of testing large aperture optical device.  
Realistic standard model fermion mass relations in generalized minimal supergravity (GmSUGRA) 期刊论文  OAI收割
JOURNAL OF HIGH ENERGY PHYSICS, 2011, 期号: 2, 页码: 96
作者:  Li, TJ
收藏  |  浏览/下载：18/0  |  提交时间：2013/05/17
Realistic standard model fermion mass relations in generalized minimal supergravity (GmSUGRA) 期刊论文  OAI收割
JOURNAL OF HIGH ENERGY PHYSICS, 2011, 期号: 2
Balazs, C; Li, TJ; Nanopoulos, DV; Wang, F
收藏  |  浏览/下载：28/0  |  提交时间：2013/09/24
北京市空气污染物对过敏性鼻炎的影响研究 中文期刊论文  OAI收割
2011
作者:  王五一
收藏  |  浏览/下载：57/0  |  提交时间：2012/05/19
Hydrogen evolution by photocatalytic decomposition of water under ultraviolet-visible irradiation over K(2)La(2)Ti(3-x)M(x)O(10+delta) perovskite 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2010, 卷号: 35, 期号: 8, 页码: 3306-3312
作者:  Wang, Bo;  Li, Chunshan;  Hirabayashi, Daisuke;  Suzuki, Kenzi
收藏  |  浏览/下载：38/0  |  提交时间：2013/11/19
Supersymmetry breaking scalar masses and trilinear soft terms in generalized minimal supergravity 期刊论文  OAI收割
JOURNAL OF HIGH ENERGY PHYSICS, 2010, 期号: 9, 页码: -
作者:  Balazs, Csaba;  Li, Tianjun;  Nanopoulos, Dimitri V.;  Wang, Fei;  Balazs, C , Monash Univ, Sch Phys, Melbourne, Vic 3800, Australia
  |  收藏  |  浏览/下载：16/0  |  提交时间：2012/08/02
Research of error correction of LEO satellite orbit prediction for vehicle-borne tracking and position device (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
作者:  Wang J.-J.;  Guo L.-H.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
Vehicle-borne tracking and position device is used to track LEO satellite. Because of the absence of the target which might be caused by cloud or zenith blind zone  the forecasting data will be used to acquire the target. While orbit prediction has serious errors  the target is always missed. Meanwhile  in its application to the vehicle-borne tracking and position device  due to the base of instability in the tracking process  it will result in significant difference between predicting data and tracking data  so the target will be not tracked rapidly. We applied tracking data to predict satellite orbits by improving Laplace method  and then corrected the error between Predicted data and actual measured data by interpolation method of Lagrange which improves the accuracy of prediction values. The testing data shows the accuracy of predicted data ranging from 3' to 10" for both azimuth and elevation when extrapolated satellite orbit to 7 seconds time. 2010 IEEE.