中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共5条，第1-5条 帮助

条数/页： 排序方式：
Experimental Study of Ignition and Flame Characteristics of Surrogate of Cracked Hydrocarbon Fuels in Supersonic Crossflow 会议论文  OAI收割
Xiamen, China, 6-9 March 2017
作者:  Cheng LW;  Zhong FQ(仲峰泉);  Wang ZP;  Gu HB(顾洪斌);  Ma SG(马素刚)
收藏  |  浏览/下载：53/0  |  提交时间：2018/01/16
Research of maneuvering target prediction and tracking technology based on IMM algorithm 期刊论文  OAI收割
Proceedings of SPIE: 8th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optical Test, Measurement Technology, and Equipment, 2016, 卷号: 9684, 页码: 968430
作者:  Cao, Zheng;  Mao, Yao;  Deng, Chao
  |  收藏  |  浏览/下载：131/0  |  提交时间：2018/06/14
Highly expanded flashing liquid jets in vacuum environment 会议论文  OAI收割
Beijing, China, September 23, 2013 - September 27, 2013
作者:  Du WF(杜王芳);  Zhao JF(赵建福)
  |  收藏  |  浏览/下载：30/0  |  提交时间：2018/11/08
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：50/0  |  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 simulation on flow and mixing of gas-solid two-phase in FCC riser feedstock injection zone by using EMMS drag model 会议论文  OAI收割
Hong Kong, Hong kong, September 6, 2014 - September 7, 2014
作者:  Chen, Sheng;  Wang, Wei;  Yan, Zihan;  Fan, Yiping;  Lu, Chunxi
  |  收藏  |  浏览/下载：0/0  |  提交时间：2023/06/16