中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共4条，第1-4条

帮助

条数/页：排序方式：
	Response spectrum 0.9-2.65 m of In0.82Ga0.18As detectors by two-step growth technique (EI CONFERENCE) 会议论文 OAI收割 2012 International Conference on Material Sciences and Manufacturing Technology, ICMSMT 2012, October 5, 2012 - October 6, 2012, Dalian, China 作者: Zhang T. 收藏 \| 浏览/下载：46/0 \| 提交时间：2013/03/25 InP/In0.82Ga0.18As/InP heterostructure used for infrared detector were grown on (100) S-doped InP substrates using two-step growth technique by low temperature metal-organic chemical vapor deposition. The growth was performed using TMIn TMGa AsH3 and PH3 as growth precursors in a horizontal reactor. The substrates on a graphite susceptor were heated by inductively coupling RF power their temperatures were detected by a thermocouple and the reactor pressure was kept at 10000 Pa. The growth structure of detector included In0.82Ga0.18As buffer with the thickness of 100 nm In0.82Ga0.18As absorption layer with the thickness of 2.8 m and the InP cap with the thickness of 0.8 m. The planar type of p-i-n detector was fabricated by Zn diffusion. The properties of In0.82Ga0.18As detector were studied the curves of the I-V characteristics the range of response spectrum and the detectivity (D*) were obtained. (2013) Trans Tech Publications Switzerland.
	Experimental and theoretical investigation of environmental media on very-high-cycle fatigue behavior for a structural steel 期刊论文 OAI收割 Acta Materialia, 2011, 卷号: 59, 期号: 4, 页码: 1321-1327 作者: Qian GA(钱桂安); Zhou CE(周承恩); Hong YS(洪友士) 收藏 \| 浏览/下载：25/0 \| 提交时间：2012/04/01 Very-High-Cycle Fatigue Aqueous Environment Fatigue Strength Fatigue Crack Initiation Structural Steel High-Strength Steels Chromium-Bearing Steel S-N Characteristics Gigacycle Fatigue Hydrogen Transport Failure Mechanism Humidity Surface Regime
	Noise processing technology of a TDICCD sensor (EI CONFERENCE) 会议论文 OAI收割 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China 作者: Zhang L.-P. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 In the application of TDI-CCD the other is all kinds of interference noise produced in the working process of a TDI-CCD for reset noise because of its serious noise interference such as reset noise and 1 / f noise correlated double sampling is employed. The experimental results show that after noise processing the imaging quality is reduced etc. According to the features of noise the output S/N has been raised to about 50 dB. 2010 IEEE. so that it is necessary to study the noise characteristics of TDI-CCD. There are two categories of noise this paper has studied the corresponding noise-processing technology. For dark current noise one is the inherent noise refrigeration is taken including shot noise dark current noise fixed pattern noise and transfer noise etc.
	Design and analysis of power system of micro-electromechanical actuator (EI CONFERENCE) 会议论文 OAI收割 2010 2nd International Conference on Industrial Mechatronics and Automation, ICIMA 2010, May 30, 2010 - May 31, 2010, Wuhan, China 作者: Zhang J.; Zhang J.; Zhang J. 收藏 \| 浏览/下载：30/0 \| 提交时间：2013/03/25 In order to apply the electromechanical actuator to tactical mini-missiles maximum rotational speed of output shafts is greater than 250/s. Test results basically correspond to the requirement of technical indexes. It is proved that this analysis and design method is congruent with the design of micro-electromechanical actuators this paper researches on the key technology such as load-bearing ability the system bandwidth can reach 25.3Hz on the condition of no load and 23.4Hz on the condition of load thus the method is feasible. 2010 IEEE. rapidity and miniaturization of the micro-electromechanical actuator power system based on the ball screw. First according to specific technical indexes the power electromechanical time constant and the size of the motors are screened originally through theoretical analysis. Finally based on the characteristics of ball screw transmission load locus of the micro-electromechanical actuator dynamic system is theoretically analyzed and the optimum speed ratio is determined through parameter optimization. The results of the double closed loop controlled test on the principle prototype show: the system can operate normally with 2.5N.m hinge moment