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浏览/检索结果: 共6条，第1-6条 帮助 限定条件 发表日期：2012    内容类型：会议论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Characteristic point match algorithm based on the SURF in binocular stereo vision (EI CONFERENCE) 会议论文 5th International Conference on Intelligent Networks and Intelligent Systems, ICINIS 2012, November 1, 2012 - November 3, 2012, Tianjin, China Wang X.; Yang L.; Wang L.; Xu J. 收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25 One of the main components of the computer vision is 3D reconstruction. Extracts and the match based on two-dimensional picture characteristic point is the 3D reconstruction technology core. Taking binocular stereoscopic vision theory as a foundation  through extracts the characteristics of SURF based on the multi-scale analysis  this feature has specific scale reproducibility  put the epipolar constraints and disparity constraints as conditions judgement to specific screening  it is greatly reduced the search range. The experiment use the matching method for three different actual scenes  the results shows that the method can enhance the image matching speed and precision  and can get more precise dense parallax  used for reconstruction complete scene. 2012 IEEE.   Comparison of radiation temperature measurement precision between middlewave and longwave thermal-imaging systems (EI CONFERENCE) 会议论文 2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China Sun Z.; Zhu W. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 A comparison study on temperature measurement precision between middlewave 3-5m and longwave 8-12m measuring thermal imaging systems has been conducted. The study was limited to systems working in indoor conditions and the target's temperature is in the range of 270K900K. First  the Disturb Resisting Function (DRF) of infrared systems is deduced. On the base of DRF curve  we find that the middlewave infrared system get the smaller influences under the same size disturb compared with the longwave system. A theory of the influence of target's physical characteristic and measurement conditions on the accuracy of temperature measurements has been developed. On the basis of the developed formulas an analysis of the influence of signal disturbances (because of incorrectly assumed emissivity  limited transmittance of the atmosphere  radiation reflected by the object and shift of optics radiation) on the accuracy of temperature measurement has been made. It has been found that the middlewave systems in typical temperature range offer generally better accuracy in temperature measurement than the longwave ones do. 2012 IEEE.   Research on load-bearing characteristics of precision air-bearing rotary stage (EI CONFERENCE) 会议论文 3rd international Conference on Manufacturing Science and Engineering, ICMSE 2012, March 27, 2012 - March 29, 2012, Xiamen, China Lin J.; Wang L.; Gao M.; Ran T. 收藏  |  浏览/下载：104/0  |  提交时间：2013/03/25 Air-bearing is a core component of air-bearing rotary stage. The weakness that the air-bearing has the low load capacity and stiffness has been concerned about by domestic and foreign scholars. So how to improve the load capacity and stiffness has become a serious problem. In order to improve the load capacity and stiffness of the air-bearing rotary stage  in this paper  we improved structure of Zhang Wenjie and others' high-precision direct-drive air-bearing rotary stage. The gas film of air-bearing has been meshed by GAMBIT software  and we use FLUENT software to obtain the carrying capacity features of the gas film. Finally  the structural static force of the precision air-bearing rotary stage will be analyzed by ANSYS software. The analysis results show that: the structural design of the precision air-bearing rotary stage is reasonable  and this structure can provide a larger range of loads. Even in heavy load conditions  a larger deformation will not occur any more. It has a good practical value  and also can be widely used in high precision equipments. (2012) Trans Tech Publications.   Research of ballistic missile early warning system (EI CONFERENCE) 会议论文 2nd International Conference on Advanced Engineering Materials and Technology, AEMT 2012, July 6, 2012 - July 8, 2012, Zhuhai, China Zhang M.-H.; Zhang Y.-Y. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 To develop a lift early warning infrared device  as a part of land or boat (ship) early warning system  the system has the ability to target pre-discovery and instructions invasion. Methods: In support of distant air situation  alerts the enemy aircraft  missiles and other long-range goals  obtain the target type and preliminary judgment of grade  deliver the alarm information to the command system. The infrared alarm device detects the target's own infrared radiation passively  alarms the incoming targets at low altitude and low altitude remote  when radar and other equipment is out of work. Results: The accuracy of entire system reached 20 according the analysis. Conclusions: The device has a full range of complex background  with high sensitivity  high resolution  anti-jamming  fast response time and other characteristics. (2012) Trans Tech Publications  Switzerland.   Bi-camera ranger-finder and error analyze based on binocular parallax (EI CONFERENCE) 会议论文 2011 International Conference on Vibration, Structural Engineering and Measurement, ICVSEM2011, October 21, 2011 - October 23, 2011, Shanghai, China Wang Z. C.; Dai M.; Huang J.; Wang Y. Y.; Chen X. L.; Gao Y. J. 收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25 The traditional facilities that used to find range are mostly based on laser or ultrasonic. Now  based on binocular parallax of human eyes  we advance a method used to get the distance by measuring the offset on image panel. On this foundation  we also analyze the error in forward. The academic analysis indicate that the measurement would be impacted severely by transverse offset and angle-measuring offset  in contrast  much slightly by lengthways offset. When we put this facility into practice  this facility can suffice practical demand completely if we select the space between bi-camera and the focus of facility rationally. (2012) Trans Tech Publications  Switzerland.   Study on the bearing capacity and ductility of steel reinforced concrete T-shaped columns 会议论文 4th International Conference on Technology of Architecture and Structure (ICTAS 2011), Xian Univ Architecture & Technol, Xian, PEOPLES R CHINA, 2011-09-22 作者:  Li, Zhe;  Chen, Shao-Ji;  Zhang, Cui-Ping;  Zhang, Shuai 收藏  |  浏览/下载：2/0  |  提交时间：2019/12/20 steel reinforced concrete T-shaped columns  nonlinear full-range analysis  load angle  sectional curvature ductility coefficient(mu phi)