中国科学院机构知识库网格系统: 检索

Mathematics Model of the Question of Micro-pits Image with Direction-uniformity Distribution and Area Scrambling Micro-pits Image Design Methods Based on Regular Graphics Arrangement 会议论文 OAI收割
3rd International Conference on Mechatronics and Intelligent Materials (MIM 2013), XiShuangBanNa, PEOPLES R CHINA, MAY 18-19, 2013
作者: Wang HC(王红才); Wang Y(王扬)

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Mathematics model Surface roughness evaluation Image design methods Uniformity

some improvements on model checking coreasm models of security protocols 会议论文 OAI收割
2nd International Symposium on Data, Privacy and E-Commerce, ISDPE 2010, Buffalo, NY, United states, September
Zhao Zhenju; Liu Feng; Peng Jianhua; Huang Danqing; Xue Rui; Zhang Zhenfeng

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收藏 | 浏览/下载：27/0 | 提交时间：2011/03/31

Abstracting Computation theory Contour followers Data privacy Electronic commerce Model checking Network protocols Trees (mathematics)

Study on navigation control method for CyberCar based on machine vision (EI CONFERENCE) 会议论文 OAI收割
2007 IEEE International Conference on Robotics and Biomimetics, ROBIO, December 15, 2007 - December 18, 2007, Yalong Bay, Sanya, China
Zhang R.-H.; Wang R.-B.; You F.; Jia H.-G.; Chen T.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

The guiding principle and composition of CyberCar based on machine vision was introduced. Applying IM sequence signals as input response signals and least squares method to establish the dynamic equation for CyberCar steering system by system identification experiments firstly and then combined with the preview kinematics model and two-degree steering dynamic model of vehicle. Therefore it can trace the path steadily and reliably. 2008 IEEE. the steering control mathematics model based on preview kinematics for CyberCar was established. And then the switching hyper plane is designed by applying the optimal control theory during the change of the curve curvature radius is little the curve tracking of the intelligent vehicle is carried out by adopting sliding variable structure controller. Aim at the parameter uncertainty of tire a vehicle steering system uncertain model was founded and analyzed. A H optimal controller is designed with the method of H control theory to solve the problem about model uncertainty. The simulation and experiment results show that the controller designed by the proposed method has good robustness and adaptability

Platform and steady kalman state observer design for intelligent vehicle based on visual guidance (EI CONFERENCE) 会议论文 OAI收割
2008 IEEE International Conference on Industrial Technology, IEEE ICIT 2008, April 21, 2008 - April 24, 2008, Chengdu, China
Rong-hui Z.; Rong-ben W.; Feng Y.; Hong-guang J.; Tao C.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

State observer design is one of key technologies in research field of intelligent vehicle. Experiment platform visual guidance intelligent vehicle JLUIV-5 is establishedby Jilin University Intelligent Vehicle Group firstly. The system structure and assistant navigation control system and different image identify algorithms to recognize preview path and stops for variable illuminations are introduced. The dynamic response equation of steering control system was got by system identification experiment. By combined with the preview kinematics model and two-degree steering dynamic model of vehicle the steering kalman filter mathematics model based on preview kinematics for intelligent vehicle was obtained. And observer is designed by applying steady Kalman filter theory. The simulation and experiment results carry out in Jilin University Nanling Campus and Culture Center of Jilin Province show that the image identify algorithms and steady Kalmanstate observer designed by the proposed method has good adaptability for time-varying and parameters uncertain it can satisfy intelligent vehicle trace the path reliably during outdoor experiment. 2008 IEEE.

Robust optimal control technology for four-wheel steering vehicle (EI CONFERENCE) 会议论文 OAI收割
2007 IEEE International Conference on Mechatronics and Automation, ICMA 2007, August 5, 2007 - August 8, 2007, Harbin, China
Zhang R.-H.; Cheng G.-Y.; Wang G.-Q.; Jia H.-G.; Chen T.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

Establish the two degree of freedom model of four-wheel steering vehicle. A H2 optimal controller and Kalman filter is designed when the control mathematics model is certainty. Aim at the parameter uncertainty of tire a four-wheel vehicle steering system uncertain model was founded and analyzed. A H optimal controller is designed with the method of H control theory to solve the problem about model uncertainty. The simulation results show that the controller designed by the proposed method has good robustness it can easily attenuate the model uncertainty and also has the strong ability to resist the disturbance. 2007 IEEE. adaptability and stability

Design of GPS/INS integrated navigation system based on multisensor information fusion (EI CONFERENCE) 会议论文 OAI收割
6th World Congress on Intelligent Control and Automation, WCICA 2006, June 21, 2006 - June 23, 2006, Dalian, China
Chunmei H.; Yantao T.; Wanxin S.; Mao L.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

Two kinds of design methods of GPS/INS integrated navigation system are presented that is GPS/INS integrative system and integrated navigation system based on information fusion. By analyzing mathematics model of the first system error we found that inertia velocity error would cause code loop track error. Consequently the pseudo range meterage error is interrelated with inertia velocity error which is complex to calculate. If this relativity is ignored in the state equation and observation equation of this system it must affect the estimated precision of the kalman filter and maybe the system is unstable. Therefore the second integrated navigation method is introduced. It adopts information fusion federal kalman filter and covariance. And consider the above pertinence to analyze the navigation performance of the integration system. Then it gives the flow of federal kalman filter algorithm. By analyzing the conclusion is that velocity error of integrated navigation system drops from 0.5m/s to below 0.05m/s and improves the precision and reliability of the navigation system effectively well continuity and real-time capability. It provides an effective way for data analysis and process of fusion navigation system. 2006 IEEE.

Study on color model conversion for camera with neural network based on the combination between second general revolving combination design and genetic algorithm (EI CONFERENCE) 会议论文 OAI收割
ICO20: Illumination, Radiation, and Color Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者: Li Z.; Zhou F.; Wang C.; Li Z.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

Munsell color system is selected to establish the mutual conversion between RGB and L*a*b* color model for camera. The color luminance meter and CCD camera synchronously measure the same color card XYZ value is gotten from the color luminance meter the training error is 0.000748566 it can show that the method combining second general revolving combination design with genetic algorithm can optimize the hidden-layer structure of neural network. Using the data of testing set to test this network and calculating the color difference between forecast value and true value the color picture captured from CCD camera is expressed for RGB value as the input of neural network and the L*a*b* value converted from XYZ value is regarded as the real color value of target card which the difference is not obvious comparing with forecast result the maximum is 5.6357 NBS namely the output of neural network. The neural network of two hidden-layers is considered the minimum is 0.5311 NBS so the second general revolving combination design is introduced into optimizing the structure of neural network and the average of color difference is 3.1744 NBS. which can carry optimization through unifying project design data processing and the precision of regression equation. Their mathematics model of encoding space is gained and the significance inspection shows the confidence degree of regression equation is 99%. The mathematics model is optimized by genetic algorithm optimization solution is gotten and function value of the goal is 0.0007168. The neural network of the optimization solution is trained

Application of the attribute recognition method for the evaluation of spatial data quality - art. no. 642014 会议论文 OAI收割
Geoinformatics 2006: Geospatial Information Science, Bellingham
Sun, Qinghui; Chi, Tianhe; Zhong, Dawei

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attribute mathematics spatial data quality evaluation of spatial data quality attribute recognition model quality evaluation model geographical information system

Optoelectronic non-contact measuring method for the taper of a bore (EI CONFERENCE) 会议论文 OAI收割
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
作者: Zhang G.; Zhang G.; Zhang G.; Yang L.; Yang L.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

Based on laser optical triangulation displacement and grating displacement inspecting principle optoelectronic non-contact inspecting method and inspecting system for the taper of small-calibre bore are presented. In this paper the constitute and overall structure of the system are described. Then the taper inspecting method and principle of the bore are discussed and theoretically analyzed and also the corresponding mathematics model is established. As inner diameter measurement is an important parameter for the taper of small-bore an inner diameter laser non-contact measuring method is presented based on the structure characteristic of the taper of small-calibre bore which adopted optoelectronic probe sensitive device (PSD) and laser optical triangulation inspecting principle. And then the laser probe inner diameter measuring system is designed based them. Moreover the measuring principle the project of optical system of this measuring system are illuminated in detail in this article. The accuracy of inspecting system is verified by experiment. The results showed that the measuring error of inspecting system is superior to 0.005 and the inspecting repetition is superior to 0.003. It indicates that the system can fulfill the inspecting accuracy demand for inspecting the taper of the small-calibre bore and the inspecting method is applicable.

A GIS-based study on the model for evaluation of direct Submerging Damage of flood disaster 会议论文 OAI收割
25th IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2005), Seoul, SOUTH KOREA, 2005
Li, J; Zhang, B

收藏 | 浏览/下载：31/0 | 提交时间：2011/07/20

GIS mathematics model spatial data Direct Submerging Damage(DSD)