中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共8条，第1-8条

帮助

条数/页：排序方式：
	Effect of compaction pressure on the densification, microstructure, and mechanical properties of Ti-1Al-8V-5Fe alloy based on TiH2 and HDH-Ti powders 期刊论文 OAI收割 MICRO & NANO LETTERS, 2019, 卷号: 14, 期号: 8, 页码: 906-910 作者: Zhang, Yanan; Guo, Xing; Chen, Yungui; Li, Qiangguo \| 收藏 \| 浏览/下载：248/0 \| 提交时间：2021/02/02 vanadium alloys hardness titanium powders iron alloys X-ray diffraction sintering crystal microstructure yield strength densification compaction aluminium alloys scanning electron microscopy titanium alloys titanium compounds mass spectroscopic chemical analysis hardness testing compressibility compaction pressure sintered density microstructural evolution mechanical properties densification dehydrogenation characteristics TG-MS O N analysers scanning electron microscopy TiAlVFe-Ti TiAlVFe-TiH2 yield strength self-cleaning ability compressibility alpha-phase volume fraction hardness tester electro-universal tester X-ray diffraction
	Effect of compaction pressure on the densification, microstructure, and mechanical properties of Ti-1Al-8V-5Fe alloy based on TiH2 and HDH-Ti powders 期刊论文 OAI收割 MICRO & NANO LETTERS, 2019, 卷号: 14, 期号: 8, 页码: 906-910 作者: Zhang, Yanan; Guo, Xing; Chen, Yungui; Li, Qiangguo \| 收藏 \| 浏览/下载：111/0 \| 提交时间：2021/02/02 vanadium alloys hardness titanium powders iron alloys X-ray diffraction sintering crystal microstructure yield strength densification compaction aluminium alloys scanning electron microscopy titanium alloys titanium compounds mass spectroscopic chemical analysis hardness testing compressibility compaction pressure sintered density microstructural evolution mechanical properties densification dehydrogenation characteristics TG-MS O N analysers scanning electron microscopy TiAlVFe-Ti TiAlVFe-TiH2 yield strength self-cleaning ability compressibility alpha-phase volume fraction hardness tester electro-universal tester X-ray diffraction
	Optimization design of strengthening components for linear motion system of the novel optical testing target 期刊论文 OAI收割 Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering, 2018, 卷号: 47, 期号: 6 作者: Zhang, Shaojun; Gao, Yunguo; Xue, Xiangyao \| 收藏 \| 浏览/下载：28/0 \| 提交时间：2019/09/17 Ability testing Continuum mechanics Modal analysis Natural frequencies Optical testing Reinforcement Structural analysis Structural design Vibration analysis
	Design and detection for the photoelectric device used in the point source transmission testing 期刊论文 OAI收割 Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument, 2018, 卷号: 39, 期号: 1, 页码: 92-99 作者: Zhang, Ning; Ye, Lu; Song, Ying \| 收藏 \| 浏览/下载：32/0 \| 提交时间：2019/09/17 Signal detection Ability testing Light sources Light transmission Optical instruments Photoelectric devices Photoelectricity Stray light
	Calibration of stray light based on point source transmittance measurement system 期刊论文 OAI收割 guangxue jingmi gongcheng/optics and precision engineering, 2016, 卷号: 24, 期号: 7, 页码: 1607-1614 作者: Xu, Liang; Gao, Li-Min 收藏 \| 浏览/下载：22/0 \| 提交时间：2016/10/13 Ability testing Distribution functions Equipment Stray light
	dealing with driver failures in the storage stack 会议论文 OAI收割 2009 4th Latin-American Symposium on Dependable Computing, LADC 2009, Joao Pessoa, Brazil, September Herder Jorrit N.; Van Moolenbroek David C.; Appuswamy Raja; Wu Bingzheng; Gras Ben; Tanenbaum Andrew S. \| 收藏 \| 浏览/下载：20/0 \| 提交时间：2011/03/20 Ability testing Computer science Disks (structural components) Quality assurance Software prototyping
	Research of automatic test technology of parameters used in a dual-CCD TV measure-system (EI CONFERENCE) 会议论文 OAI收割 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 2, 2005 - November 5, 2005, Zian, China 作者: Wang L.; Li Y.; Li Y. 收藏 \| 浏览/下载：20/0 \| 提交时间：2013/03/25 This paper describes a kind of automatic test technology of the parameters used in a dual-CCD TV measure-system (TV -MS) .The TV -MS is the ground control equipment of the anti-tank missile and integrates the technologies of optical machine and electronics. It is important and key component. The main technical parameters of the TV -MS are field of view zero point precision sensitivity anti-jamming ability zooming time and focus time etc. To insure the TV -MS satisfying the tactical and technical requirements and discover fault and reason a fast and accurate equipment satisfying the test technical parameters of the TV -MS is urgently needed in manufacture and service. Firstly the parameter test system converted optical signal to electronic signal implemented automatic control of the invariant illumination of parallel pipeline output. Secondly data and command delivering displaying or printing are realized by using 80C196KB. The experiment result shows that the approach of automatic testing of the Parameters used in a dual-CCD TV -MS is successful and it can be used for all tests of the functions and parameters of the TV -MS. The main innovations are to realize the fast veracious measure of technical parameters of the dual-CCD TV-MS and integrate the technologies of optics machineries and electronics. An advanced means is provided to judge the technical states find malfunctions and discover the reasons in producing and maintaining process. The equipment suited for anti-tank missile systems is given.
	Intelligent MRTD testing for thermal imaging system using ANN (EI CONFERENCE) 会议论文 OAI收割 ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China Sun J.; Ma D. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 The Minimum Resolvable Temperature Difference (MRTD) is the most widely accepted figure for describing the performance of a thermal imaging system. Many models have been proposed to predict it. The MRTD testing is a psychophysical task for which biases are unavoidable. It requires laboratory conditions such as normal air condition and a constant temperature. It also needs expensive measuring equipments and takes a considerable period of time. Especially when measuring imagers of the same type the test is time consuming. So an automated and intelligent measurement method should be discussed. This paper adopts the concept of automated MRTD testing using boundary contour system and fuzzy ARTMAP but uses different methods. It describes an Automated MRTD Testing procedure basing on Back-Propagation Network. Firstly we use frame grabber to capture the 4-bar target image data. Then according to image gray scale we segment the image to get 4-bar place and extract feature vector representing the image characteristic and human detection ability. These feature sets along with known target visibility are used to train the ANN (Artificial Neural Networks). Actually it is a nonlinear classification (of input dimensions) of the image series using ANN. Our task is to justify if image is resolvable or uncertainty. Then the trained ANN will emulate observer performance in determining MRTD. This method can reduce the uncertainties between observers and long time dependent factors by standardization. This paper will introduce the feature extraction algorithm demonstrate the feasibility of the whole process and give the accuracy of MRTD measurement.