中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共7条，第1-7条

帮助

条数/页：排序方式：
	A study of aging effects of barrel time-of-flight system in the besiii experiment 期刊论文 iSwitch采集 Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment, 2018, 卷号: 882, 页码: 41-44 作者: Liu, Huan-Huan; Sun, Sheng-Sen; Fang, Shuang-Shi; Wu, Zhi; Dai, Hong-Liang 收藏 \| 浏览/下载：77/0 \| 提交时间：2019/04/23 Time-of-flight system Scintillation counter Aging effect Attenuation length
	A study of aging effects of barrel Time-Of-Flight system in the BESIII experiment 期刊论文 OAI收割 NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2018, 卷号: 882, 页码: 41-44 作者: Zhou M(周明); Heng YK(衡月昆); Dai HL(代洪亮); Wu Z(吴智); Fang SS(房双世) \| 收藏 \| 浏览/下载：42/0 \| 提交时间：2019/09/24 Time-Of-Flight system Scintillation counter Aging effect Attenuation length
	A Method to Estimate Shear Quality Factor of Hard Rocks 期刊论文 OAI收割 PURE AND APPLIED GEOPHYSICS, 2017, 卷号: 174, 期号: 7, 页码: 2689-2703 作者: Wang, Xin; Cai, Ming \| 收藏 \| 浏览/下载：30/0 \| 提交时间：2018/06/05 Attenuation effect shear quality factor wave propagation modeling ground motions design scaling law SPECFEM2D
	Strong motion characteristics of the m (w) 6.6 lushan earthquake, sichuan, china - an insight into the spatial difference of a typical thrust fault earthquake 期刊论文 iSwitch采集 Earthquake engineering and engineering vibration, 2015, 卷号: 14, 期号: 2, 页码: 203-216 作者: Hu Jinjun; Zhang Wenbo; Xie Lili; Zhang Qi; Jiang Zhijun 收藏 \| 浏览/下载：36/0 \| 提交时间：2019/05/10 Lushan earthquake Near-field ground motion Directivity Hanging-wall effect Attenuation relation
	Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China 作者: Zhang Z.-D. 收藏 \| 浏览/下载：51/0 \| 提交时间：2013/03/25 Ground-based infrared imaging tracking system (GIITS) is of great importance for aerial target warning and guard. The operating range is one of the key performance specifications on the other which should be calculated calculate the radiation power received on the detector in order to analysis whether the output signal meets the detection requirements or not analyzed and studied during the whole GIITS design process. The operating range is mostly influenced by a few factors without considering the effect of the background radiation. By improving of the traditional method including atmospheric attenuation a new operating range calculation model of the GIITS was established based on two requirements. One is that the image size of observed target should meet the requirement of the processor signal extraction. The number of the pixel occupied by target image should be more than 9. The other is that the signal noise ratio (SNR) of the GIITS should not be less than 5 to meet the requirements of the target detection probability and spatial frequency. The SNR calculation equation in form of energy is deduced and the radiation characteristic of the observed target and background are analyzed. When evaluate the operating range of the GIITS using the new method the performance of GIITS and feature of target and background. This paper firstly makes analysis and summarization on the definite localizations of the traditional operating range equation of the GIITS. The localizations are mainly in two aspects. On one hand we should successively calculate two operating range values according to two requirements mentioned above and choose the minimum value as the analytic result. In the end the dispersion of the image and the effect of image dispersion are not considered in the traditional method an evaluation of operating range for fighter aircraft is accomplished as an example. The influence factors in every aspect on operating range were explored by the calculated result. The new operating range calculation model provides the theoretical basis for the design and applications as well as the comprehensive evaluation of a GIITS. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
	Numerical investigation of joint effect on shock wave propagation in jointed rock masses 期刊论文 OAI收割 JOURNAL OF TESTING AND EVALUATION, 2005, 卷号: 33, 期号: 3, 页码: 197-203 作者: Fan, SC; Jiao, YY; Zhao, J \| 收藏 \| 浏览/下载：17/0 \| 提交时间：2018/06/05 shock wave joint effect attenuation simulation 3D DEM 3D FDM
	Adjustable character of microwave attenuation in BaTiO3 electrorheological fluids 期刊论文 OAI收割 PROGRESS IN NATURAL SCIENCE, 2002, 卷号: 12, 期号: 10, 页码: 753-758 作者: Fan, JJ; Zhao, XP; Huang, M; Guan, LT; Wen, LH \| 收藏 \| 浏览/下载：14/0 \| 提交时间：2021/02/02 electrorheological fluids BaTiO3 microwave attenuation relaxation effect