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He W.,CAS Institute of Automation | He W.,Key Laboratory of Measurement and Control of CSE | Yuan K.,CAS Institute of Automation
Proceedings of the World Congress on Intelligent Control and Automation (WCICA) | Year: 2011

Hough Transform is a powerful and robust global image processing tool for line detection in picture. However, the traditional Hough Transform is complex because of the calculation of trigonometric functions and multiplication. To overcome this disadvantage, a novel algorithm using simple shift and addition will be discussed in this thesis to replace the complex trigonometric functions and multiplication. Meanwhile, a deep pipelined and parallel realization of this new algorithm on FPGA is also designed. In addition, a new threshold method based on the peak extraction is proposed to eliminate the fake lines produced by the traditional Hough Transform. Experiment results are also presented to prove the efficiency of the proposed method. © 2011 IEEE.


Xiao H.,CAS Institute of Automation | Yuan K.,CAS Institute of Automation | He W.,CAS Institute of Automation | He W.,Key Laboratory of Measurement and Control of CSE
Proceedings of the World Congress on Intelligent Control and Automation (WCICA) | Year: 2011

In order to achieve real-time detection of SIFT keypoints through hardware computation on FPGA, the original algorithm was redesigned to accommodate the parallel computation and pipelined structure of hardware. The computation accuracy of fixed-point number is improved by the new scheme, while the computation amount of the whole algorithm is greatly reduced and hardware cost is saved. In the aspect of performance, the new scheme is as robust to image noise as the original algorithm, while the scale invariance of keypoints has been improved dramatically. © 2011 IEEE.


Yang R.-Z.,Nanjing Southeast University | Yan H.-S.,Nanjing Southeast University | Yan H.-S.,Key Laboratory of Measurement and Control of CSE
Kongzhi Lilun Yu Yingyong/Control Theory and Applications | Year: 2013

The knowledge mesh's selection method based on fuzzy relation clustering is proposed for the selecting problem caused by the increasing similar knowledge mesh and unclear requirements of user in knowledgeable manufacturing system. The similarity degree which synthesizes the function, perfection degree and structure of knowledge mesh, has the characteristics of reflecting operation laws. The similarity values as cluster data reduce the dimension of high-dimensional feature space. The decomposition of fuzzy relational matrix obtains the groups of knowledge meshes. The comparisons between target knowledge mesh and knowledge mesh with high class membership degree in each class narrow the scope of user selection. The last example shows that the method is effective and feasible.


Chen Y.,Key Laboratory of Measurement and Control of CSE | Chen Y.,Henan Institute of Science and Technology | Fei S.,Key Laboratory of Measurement and Control of CSE | Zhang K.,Key Laboratory of Measurement and Control of CSE
International Journal of Computer Mathematics | Year: 2012

This paper considers the asymptotic stability problem for a class of neural networks with discrete and distributed delays. Based on a new augmented Lyapunov functional and integral inequalities, the new asymptotic stability condition is established in terms of linear matrix inequality. Meanwhile, the importance of some augmented terms in the Lyapunov functional are discussed. Compared with previous methods to deal with the distributed delay, our method is less conservative due to the use of the new Lyapunov functional. Finally, numerical examples illustrate the relaxation of obtained results and our claims. © 2012 Taylor & Francis.


Du H.,Key Laboratory of Measurement and Control of CSE | Du H.,Nanjing Southeast University | Li S.,Key Laboratory of Measurement and Control of CSE | Li S.,Nanjing Southeast University
Journal of Guidance, Control, and Dynamics | Year: 2012

The global finite-time attitude stabilization problem for a rigid spacecraft system is investigated. The actuator saturation is explicitly taken into account in the proposed finite-time stabilizer. Based on a homogeneous method, a local continuous saturated finite-time controller is first designed. Then, based on switching method, a global saturated finite-time controller is developed. Simulation results are given to demonstrate the efficiency of the proposed method. © © 2011 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

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