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浏览/检索结果: 共8条,第1-8条 帮助

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A Perfectly Matched Layer Metric for the Electromagnetic Diffusion Field 期刊论文  OAI收割
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2021, 卷号: 69, 期号: 2, 页码: 928-939
作者:  
Yang, Liangyong;  Lei, Da;  Di, Qingyun
  |  收藏  |  浏览/下载:25/0  |  提交时间:2021/10/09
Gravitational Waves, baryon asymmetry of the universe and electric dipole moment in the CP-violating NMSSM 期刊论文  OAI收割
CHINESE PHYSICS C, 2018, 卷号: 42, 期号: 9, 页码: 93106
作者:  
Bian, L;  Shu, J;  Guo, HK
  |  收藏  |  浏览/下载:133/0  |  提交时间:2018/12/27
Multiscale computation for transient heat conduction problem with radiation boundary condition in porous materials 期刊论文  OAI收割
FINITE ELEMENTS IN ANALYSIS AND DESIGN, 2015, 卷号: 102-103, 页码: 7-18
作者:  
Yang, Zhiqiang;  Cui, Junzhi;  Sun, Yi;  Ge, Jingran
  |  收藏  |  浏览/下载:32/0  |  提交时间:2018/07/30
Information Recovery with Hawking Radiation from Dynamical Horizons 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2014, 卷号: 53, 期号: 9, 页码: 2980-2987
作者:  
Guo, Xiao-Kan;  Cai, Qing-yu
收藏  |  浏览/下载:26/0  |  提交时间:2015/06/24
Method for obtaining real temperature of space object by using the ratio of emissivity at different wavelengths (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
Guo-Qiang W.; Tao C.; Jian-Li W.
收藏  |  浏览/下载:33/0  |  提交时间:2013/03/25
The infrared radiation character (temperature and efficiency radiation area) of a space object is an important characteristic  we can judge the state of the object working in orbit by measuring temperature and variety. Due to lower temperature of the object and far distance between the object and the earth  the infrared radiation signal is faintness  therefore temperature and the infrared radiation character is difficult to measure. There are several methods to measure the temperature of the object in theory and each one has its applicability respectively  such as applying Wien Law to compute temperature  based on Stefan-Bolzmann law to compute temperature and utilizing multi-spectrum detector to measure temperature As a whole these methods are based on the hypothesis that the object is a Black-body or the radiance emissivity is constant. In fact  homochromatic radiance of object is not a constant but a function that changes with wavelength. Since the problem that an object whose homochromatic radiance s not a constant which results in temperature can not be computed accurately  we bring forward a method to contrast the luminance of the object at different wavelengths and deduce the relationship among homochromatic radiance and wavelength and the temperature of Black-body  from which we can compute real temperature of object. 2009 SPIE.  
Research on the support structure of the primary mirror of large-aperture telescope (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China
Yang W.; Jingxu Z.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
Large-aperture telescope can be used in surveying battlefield  researching landform  searching object  real-time monitoring  imaging  detecting and identifying spatial targets and so on. A large-aperture telescope for achieving high resolution power is designed to monitor spatial target and image in real time. Real-time monitoring plays an important role in military conflicts. The orbit parameter of object  quantity  geometrical shape parameter and so on can be obtained by detect spatial target. With the development of optical technology  people require larger aperture in optics-electronic (OE) system. By increasing optical aperture  the ability of collecting light and resolution power in the system can be enhanced. But the support structure of the primary mirror of large-aperture telescope will be a very difficult problem. With the increase of primary mirror aperture  the weight of the primary mirror will become larger than before. The root mean square (rms) of the primary mirror is affected by many factors  such as deadweight  deformation of heat  environment and so on. Due to the primary mirror of telescope is an important component of telescope system. By reducing the weight of primary mirror  precision of the system is ensured. During the designing phase  one can consider the supporting project of the primary mirror synthetically and analyze it roundly according to technical requirement of optical system and the effect factors. The final structural design can be reasonable. In an astronomical telescope  the surface of reflector is an important part for collecting dark radiation of celestial bodies. Its surface shape will have an effect on collecting efficiency of telescope radiant energy directly. So the rms must be very high. Optical system of large aperture  small wavelength and small focus can receive maximal light intensity. For ground-based optical astronomical telescope  the design proposed in the paper can satisfy the requirement of the possible minimum atmosphere seeing at astronomical observatory site and exert the use efficiency of the telescope adequately. So the accuracy of the traditional surface of reflector can assure that 90% of all the light energy can be focused on within the angle diameter range of the minimum atmosphere seeing  then 100% of light energy should be focused on the angle diameter range of minimum atmosphere seeing. Because the rms of mirror is very high  precise surface machining and accurate the support of mirror are very important tasks during designing and manufacturing the telescope. In the paper  various support techniques of a large-aperture telescope primary mirror are discussed and a 3.5 meter telescope system at the Starfire Optical Range (SOR) overviewed simply  which was operated by the Directed Energy Directorate of the Air Force Research Laboratory  Kirtland AFB  NM  USA from the ground-based O-E system for the observations of spatial target. We also analyze Theoretical elastic deformation of the Steward Observatory 2.3 meter mirror is analyzed.  
Response amplitude and hydrodynamic force for a buoy over a convex 期刊论文  OAI收割
journal of waterway port coastal and ocean engineering-asce, 2006, 卷号: 132, 期号: 2, 页码: 97-105
作者:  
Wu, BJ;  Zheng, YH;  You, YG
收藏  |  浏览/下载:57/8  |  提交时间:2010/09/30
Inverse Radiation Problem of Boundary Incident Radiation Heat Flux in Semitransparent Planar Slab with Semitransparent Boundaries 期刊论文  OAI收割
JOURNAL OF THERMAL SCIENCE, 1998, 卷号: 7, 期号: 2, 页码: 131138
Liu Linhua; Tan Heping; Yu Qizheng
收藏  |  浏览/下载:12/0  |  提交时间:2013/03/12