中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共8条,第1-8条 帮助

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Swelling Cities? Detecting China's Urban Land Transition Based on Time Series Data 期刊论文  OAI收割
LAND, 2023, 卷号: 12, 期号: 1
作者:  
Pan, Wei;  Wang, Jing;  Lu, Zhi;  Li, Yurui
  |  收藏  |  浏览/下载:14/0  |  提交时间:2023/03/03
Managing Traditional Solar Greenhouse With CPSS: A Just-for-Fit Philosophy 期刊论文  OAI收割
IEEE TRANSACTIONS ON CYBERNETICS, 2018, 卷号: 48, 期号: 12, 页码: 3371-3380
作者:  
Kang, Mengzhen;  Fan, Xing-Rong;  Hua, Jing;  Wang, Haoyu;  Wang, Xiujuan
  |  收藏  |  浏览/下载:69/0  |  提交时间:2019/01/08
Managing Traditional Solar Greenhouse with CPSS-a Just-For-Fit Philosophy 期刊论文  OAI收割
IEEE TRANSACTIONS ON CYBERNETICS, 2018, 期号: 99, 页码: 1-10
作者:  
Kang, Mengzhen;  Fan, Xing-Rong;  Hua, Jing;  Wang, Haoyu;  Wang, Xiujuan
  |  收藏  |  浏览/下载:39/0  |  提交时间:2018/10/10
The Roles of Spatial Locations and Patterns of Initial Errors in the Uncertainties of Tropical Cyclone Forecasts CNKI期刊论文  OAI收割
2012
作者:  
Chen BY(陈博宇);  Mu M(穆穆)
  |  收藏  |  浏览/下载:1/0  |  提交时间:2024/12/18
The roles of spatial locations and patterns of initial errors in the uncertainties of tropical cyclone forecasts 期刊论文  OAI收割
ADVANCES IN ATMOSPHERIC SCIENCES, 2012, 卷号: 29, 期号: 1, 页码: 63-78
作者:  
Chen Boyu;  Mu Mu
收藏  |  浏览/下载:28/0  |  提交时间:2013/09/24
Experiments of second harmonic generation output in pulsed TEA CO 2 laser (EI CONFERENCE) 会议论文  OAI收割
High-Power Lasers and Applications V, October 18, 2010 - October 19, 2010, Beijing, China
作者:  
Li D.
收藏  |  浏览/下载:55/0  |  提交时间:2013/03/25
It is always the hot subject to realize the output of high-power laser in the range of 3-5m wavelength. This rang of wave band has greatly important applications in military because it located in the atmosphere window. Generally there are two ways to obtain this range of laser wavelength. One way is through optical parameter oscillation (OPO) from shorter laser wavelength and the other is through second harmonic generation (SHG) from longer laser wavelength. Firstly  the comparison between tow nonlinear crystals ZnGeP2 and AgGaSe2 is conducted for their nonlinear coefficient and damaging threshold in theory. The theoretical results show that the crystal AgGaSe 2 is more suitable for the SHG of pulsed TEA CO2 laser. When using pulsed TEA CO2 laser with wavelength of 9.3m to pumping AgGaSe2 SHG crystal  the wavelength of 4.65m is obtained. In the condition of repetition rate 100Hz  the upmost output power of single pulse is up to level of 1W  which corresponding efficiency of SHG is about 6%. The experimental results show that the polarization of laser beam has greatly influence on the SHG output of the crystal. Under the radiation of 3MW/cm 2 from fundamental wave and the right position for maximal SHG output in the crystal  when polarization of laser beam rotates 4.5  the SHG output of energy decrease about 30%. The research of this paper will make a foundation for further development of mid-infrared laser. 2010 Copyright SPIE - The International Society for Optical Engineering.  
Hirfl-CSR facility status and development 期刊论文  OAI收割
CYCLOTRONS 2010 - 19th International Conference on Cyclotrons and Their Applications, 2010, 页码: 37-41
作者:  
Yang, X.D.;  Xu, H.S.;  Yang, J.C.;  Xia, J.W.;  Zhao, H.W.
  |  收藏  |  浏览/下载:24/0  |  提交时间:2016/03/29
Space optics remote sensor focusing components mechanics characteristic analysis based on FEM (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, June 17, 2009 - June 19, 2009, Beijing, China
作者:  
Wang B.;  Ren J.-Y.;  Wang B.
收藏  |  浏览/下载:164/0  |  提交时间:2013/03/25
Space optical remote sensor is very important in many fields of science and military significance. It is widely applied. Space optical remote sensor design and manufacturing require precision and stability. Focusing mechanics is an important component of remote sensors. Focusing mechanics can guarantee the stability of the entire mechanics focusing accuracy  therefore the stability of research focusing mechanics is very important. In order to guarantee the space optics remote sensor focusing mechanics the stability  takes steps the space optics remote sensor focusing organization mechanics characteristic analysis from the classics contact theory. This article uses international general non-linear finite element analysis software ABAQUS to carry on mechanics characteristic analysis to the space optics remote sensor focusing mechanics. First acts according to the focusing mechanics unique feature  carries on the finite element to the structural model the grid division  the material attribute disposition and the boundary condition indeed grades. Then establishment contact non-linear finite element model  and to focusing organization finite element model infliction unit action. Like this contacts the result and the equivalent static analysis result which the nonlinear analysis obtains carries on the contrast and the analysis. This article last count result modality is 90HZ  satisfies the space optics remote sensor structure overall modality to request to be bigger than 50HZ.This article when carries on the dynamic analysis  extracts the structure kinetic energy and the acceleration curve. In the dynamic analysis obtained transient response analysis modality 70.5Hz  this also is bigger than 50HZ. The dynamic analysis indicated the structure dynamic stability has the distinct enhancement  has provided certain foundation for the space optics remote sensor following development work  reduced the overall system development cycle. 2009 SPIE.