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：
	Multi-parameters measurement of EAST PFCs prototype with FBG sensors 期刊论文 OAI收割 FUSION ENGINEERING AND DESIGN, 2017, 卷号: 122, 期号: 无, 页码: 1-7 作者: Yu, Xiao; Xi, Weibin; Xu, Weiwei; Lei, Mingzhun; Liu, Zheng \| 收藏 \| 浏览/下载：38/0 \| 提交时间：2019/02/28 Multi-parameters measurement EAST PFCs FBG sensors High temperature and vacuum
	Multi-parameters measurement of EAST PFCs prototype with FBG sensors 期刊论文 OAI收割 Fusion Engineering and Design, 2017, 卷号: 122, 页码: 1-7 作者: Song, Yuntao; Yu, Xiao; Xi WB(奚维斌); Xu, Weiwei; Lei, Mingzhun \| 收藏 \| 浏览/下载：41/0 \| 提交时间：2017/11/15 Multi-parameters measurement EAST PFCs FBG sensors High temperature and vacuum
	Impact of fillers and counterface topography on wear behavior of PTFE polymers for ultrasonic motor 期刊论文 OAI收割 Journal of Applied Polymer Science, 2017, 卷号: 134, 期号: 19, 页码: 44835(1-10) 作者: Wang QH(王齐华); Song FZ(宋富智); Zhang XR(张新瑞); Zhao G(赵盖); Wang TM(王廷梅) 收藏 \| 浏览/下载：32/0 \| 提交时间：2017/04/27 cryogenic and high temperature PTFE-based friction materials ultrasonic motor vacuum degree
	Design and experimental research of a new type focus mechanism used in space-based telescope (EI CONFERENCE) 会议论文 OAI收割 2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China 作者: Wang D. 收藏 \| 浏览/下载：41/0 \| 提交时间：2013/03/25 The position of focal plane will be changed because of temperature fluctuation and vacuum environment. In order to make the telescope work well positioning accuracy of the mechanism is 0.008mm. The performance satisfies the need of precision a focusing mechanism is needed. To majority of large space-based telescopes and the scheme design is reasonable and practicable. 2012 IEEE. the general way to do this would be to use a reflector which was located in the backfocal distance. One of typical schemes of this mechanism was introduced however because of the big axial size the mechanism can't be used when the size of the enclosure was limited. A new type of focusing mechanism was introduced which has such advantages of small size high accuracy and low mass. The design and test methods had been discussed. According to the results the repeatability positioning accuracy is 0.0025mm
	Design and test of focusing mechanism of space camera (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, April 26, 2010 - April 29, 2010, Dalian, China 作者: Li Y.; Li Y.; Li Y.; Wang H.; Wang H. 收藏 \| 浏览/下载：33/0 \| 提交时间：2013/03/25 According to the focal depth and work environment of a space camera a focusing mechanism is designed which consists of precision screw ball transmission and linear bearing guidance and accuracy improving. The dynamic- strike- resistance adaptability to temperature and vacuum are considered into the reliable design method. Furthermore the linearity error the structure stability and the mechanism work situation in high and low temperature are tested. The result is that the linearity error of the mechanism is less than 0.003 mm and the sway error of vertical way and level way of the mirror is less than 20''. The linearity error of the mechanism and the sway error of the mirror remain unchanged after vibration test. The mechanism can work in the complex space environment. 2010 SPIE.
	Study of 316L stainless steel coronary stent high vacuum heat treatment (EI CONFERENCE) 会议论文 OAI收割 2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China 作者: Wang J.-L.; Wang J.-L. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 Establish the high vaccum heat treatment platform for high vacuum heat treatment of 316L stainless steel coronary stent by analysis the influence of heating-up temperature and holding time fix the art of high vaccum heat treatment through optimizing series parameters draw the conclusion that we may inlet auxiliary gas and add wire netting to achieve bright heat treatment sample. 2009 IEEE.
	Fabrication and electron emission of carbon microtubes (EI CONFERENCE) 会议论文 OAI收割 Technical Digest of the 18th International Vacuum Nanoelectronics Conference, IVNC 2005, July 10, 2005 - July 14, 2005, Oxford, United kingdom 作者: Liu L.; Liu L.; Wang W.; Wang W. 收藏 \| 浏览/下载：46/0 \| 提交时间：2013/03/25 Carbon nanotubes have been attracting attention because of their unique physical properties and their application potential for field emission cathode. Carbon nanotubes possess the following properties favorable for field emission material such as a high aspect ratio and sharp tip high chemical stability high mechanical strength stable at high temperature. Some research works on carbon nanotubes field emitter and field emission display have been reported. Here a kind of carbon microtubes and its field emission properties are introduced. They have some different properties with carbon nanotubes and the density is lower than carbon nanotubes bundles. These carbon microtubes are directly synthesized by liquidoid epitaxy method on silicon substrates at low temperature. The field emission properties of carbon microtubes are reported too. Carbon microtubes film is synthesized in liquid by electrolysis. The graphite plate is as anode and n-silicon substrate with resistivity of 4-8 cm is as cathode. The electrolysis current is about 5-8mA/cm2 and applied voltage is 800-1500V. Temperatures of the methanol base solution is maintained at 60C in process of deposition of carbon microtubes. Carbon microtubes film is observed by scanning electron microscopy(SEM) as shown in fig.1(a b). The wall's thickness of carbon microtube is about 60nm. The diameter of carbon microtube is about 0.8 m. Raman spectrum of carbon microtubes film shows the two peaks at 1342and 1560cm-1. The field emission properties of carbon microtubes are measured in high vacuum chamber(10-5Pa). The emission area of carbon microtubes is 0.5cm 0.5cm. The threshold of field emission of the carbon microtubes film is about 3.6V/ m. Field emission property of carbon microtubes film is shown in fig.2. Another when the electric field between anode and cathode is 10V/ m the electric field distribution on single carbon microtube is also given after calculation according to electric field theory. Fig 3 shows that electric field distribution vertical section on the of single carbon microtube top with 2 m of highness. These results may help us to understand field emission properties of carbon microtubes. According to research results it is found that liquidoid synthesis is simple method to produce carbon microtubes cold cathode material and the carbon microtubes have better field emission properties. 2005 IEEE.