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• 长春光学精密机械与... [10]

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• OAI收割 [10]

内容类型

• 会议论文 [10]

发表日期

• 2012 [3]
• 2011 [2]
• 2010 [2]
• 2007 [2]
• 2001 [1]

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浏览/检索结果: 共10条，第1-10条 帮助 限定条件 内容类型：会议论文    专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择提交时间升序提交时间降序题名升序题名降序作者升序作者降序发表日期升序发表日期降序 The state of the art for liquid crystal adaptive optics in astronomical applications (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China 作者:  Liu Y.;  Liu Y.;  Xuan L.;  Liu Y. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 In this paper  we summarize the researches of liquid crystal (LC) adaptive optics(AO) in astronomical applications. Dual frequency and nematic LC materials were reported to be used in astronomical observations. However  nematic LC with its simple producing and driving method and multi-gray-level is promising in the application. We have investigated the nematic LC AO system and promoted its application for nearly ten years. Here  we reported our newest nematic LC AO system with bandwidth result of 3dB is 54.4 Hz  0dB bandwidth is 79.1Hz. 2012 IEEE.   The state of the art for Liquid crystal adaptive optics in astronomical applications 会议论文  OAI收割 2012 作者:  Xuan L. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/28 Reliable attitude stability control of quad-rotor based on fault-tolerant approach (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:  Gao Q. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 The reliability flight property has received much attention within the aircraft control community throughout the last decades. In this paper  the fault-tolerant control technique is introduced into the attitude stability control system of a quadrotor UAV in order to compensate the influence of the actuators fault of the aircraft. This control scheme is composed of two components: a robust fault detection module using the modelbased observation approach and a reconfigurable controller. Besides the designing procedure  the theoretical analysis of robustness and stability of the designed FTC scheme are also contained in this article. And finally  the availability of the proposed scheme is verified through numerical simulation. 2012 IEEE.   On Optimal Guidance Arithmetic of Super-maneuverable Aircraft 会议论文  OAI收割 2011 作者:  Gong Y. 收藏  |  浏览/下载：6/0  |  提交时间：2013/03/28 On optimal guidance arithmetic of Super-maneuverable aircraft (EI CONFERENCE) 会议论文  OAI收割 30th Chinese Control Conference, CCC 2011, July 22, 2011 - July 24, 2011, Yantai, China 作者:  Liu Y.;  Gong Y.;  Wang Z.;  Wang Z.;  Liu Y. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 Due to the complexity of maneuverability  Super-maneuver attack guidance of modern aircraft has become the most important function to be immediately solved and perfectly completed. Proceed from the maneuvering optimization position and based on the optimal control theory  the optimal angle maneuver guidance arithmatic is proposed. On the basis of aircraft maneuver guidance algorithm  we come up with a variety of constraint condition  optimized index and optimization rule and present a set of steepest optimal angle maneuver guidance algorithm  and the validity and feasibility of the steepest optimal angle maneuver guidance algorithm has been comfirmed by the super-maneuver guidance simulation. 2011 Chinese Assoc of Automati.   The application of TMS320c64x DSP assembly language in correlation tracking algorithms (EI CONFERENCE) 会议论文  OAI收割 2010 3rd International Congress on Image and Signal Processing, CISP 2010, October 16, 2010 - October 18, 2010, Yantai, China Huang D.; Wu Z.; Liang M.; Dong Y.; Peng T. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25 In order to improve the real-time performance of the conventional correlation tracking algorithm based on full search method  for its huge computation amount and vast correlation matching times in the process of searching an optimal matching position  a method of combining the TMS320C64x DSP assembly language and software pipelining is proposed to realize template matching which costs the most time of the algorithm. Choose high performance DSP chip TMS320DM642 as the core processor of the hardware platform  and schedule each one of the instruction in the algorithm to maximize performance using the instruction-level parallelism of the DSP. The experimental results indicate the time of template image matching implemented in assembly language has decreased from 49.36ms to 0.62ms. It is concluded that the correlation tracking adopting proposed method can meet the real-time and stability requirement of the target tracking. 2010 IEEE.   High-performance soft x-ray spectromicroscopy beamline at SSRF (EI CONFERENCE) 会议论文  OAI收割 作者:  Xue C.;  Chen J.;  Wang Y.;  Wang Y.;  Wang Y. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 The Shanghai Synchrotron Radiation Facility (SSRF) is the first third-generation synchrotron facility in China and operated at an electron energy of 3.5 GeV. One of the seven beamlines in the first construction phase is devoted to soft x-ray spectromicroscopy and is equipped with an elliptically polarized undulator light source  a plane grating monochromator  and a scanning transmission x-ray microscope end station. Initial results reveal the high performance of this beamline  with an energy resolving power estimated to be over 10 000 at the argon L-edge and a spatial resolution better than 30 nm. 2010 American Institute of Physics.   High power VCSEL device with periodic gain active region - art. no. 67820O 会议论文  OAI收割 2007 作者:  Sun Y.;  Wang L.;  Wang L.;  Wang L.;  Liu Y. 收藏  |  浏览/下载：7/0  |  提交时间：2013/03/28 High power VCSEL device with periodic gain active region (EI CONFERENCE) 会议论文  OAI收割 Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China 作者:  Zhang Y.;  Liu Y.;  Liu Y.;  Liu Y.;  Qin L. 收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25 High power vertical cavity surface emitting lasers with large aperture have been fabricated through improving passivation  lateral oxidation and heat dissipation techniques. Different from conventional three quantum well structure  a periodic gain active region with nine quantum wells was incorporated into the VCSEL structure  with which high efficiency and high power operation were expected. The nine quantum wells were divided into three groups with each of them located at the antinodes of the cavity to enhance the coupling between the optical field and the gain region. Large aperture and bottom-emitting configuration was used to improve the beam quality and the heat dissipation. A maximum output power of 1.4W was demonstrated at CW operation for a 400m-diameter device. The lasing wavelength shifted to 995.5nm with a FWHM of 2nm at a current of 4.8A due to the internal heating and the absence of active water cooling. A ring-shape farfield pattern was induced by the non-homogeneous lateral current distribution in large diameter device. The light intensity at the center of the ring increased with increasing current. A symmetric round light spot at the center and single transverse mode operation with a divergence angle of 16 were observed with current beyond 4.8A.   The field emission properties of epitaxial diamond film 会议论文  OAI收割 2001 Wang W. B.; Gu C. Z.; Zhao H. F.; Zhang C. P.; Peng H. Y. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/28