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The Minimum Principle for Hybrid Systems with Partitioned State Space and Unspecified Discrete State Sequence

The Minimum Principle for Hybrid Systems with Partitioned St...

引用

2010 49th IEEE Conference on Decision and Control

作者： Benjamin Passenberg Peter E. Caines Marion Sobotka Olaf Stursberg Martin Buss Institute of Automatic Control Department of Electrical Engineering and Information Technology Technische Universitat Munchen Munchen Germany Department of Electrical and Computer Engineering and the Center for Intelligent Machines McGill University Montreal Canada Institute of Control and System Theory Department of Electrical Engineering and Computer Science University of Kassel Kassel Germany

ISBN: (纸本)9781424477456

The hybrid minimum principle (HMP) gives necessary conditions to be satisfied for optimal solutions of a hybrid dynamical system. In particular, the HMP accounts for autonomous switching between discrete states that occurs whenever the trajectory hits switching manifolds. In this paper, the existing HMP is extended for hybrid systems with partitioned state space to provide necessary conditions for optimal trajectories that pass through an intersection of switching manifolds. This extension is especially useful for the numerical solution of hybrid optimal control problems as it allows for algorithms with significant reduction of computational complexity. Algorithms based on previous versions of the HMP solve separate optimal control problems for each possible sequence of discrete states. The extension enables us to consider the optimal sequence as subject of optimal control that is varied and finally determined during a single optimization run. A first numerical result illustrates the effectiveness of an algorithm based on the extended HMP.

关键词： state space minimum principle hybrid systems Manifolds Optimal control DYNAMICAL SYSTEMS discrete element

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Image Fusion Based on NSCT and Fuzzy Logic

Image Fusion Based on NSCT and Fuzzy Logic

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International Conference on Multimedia Technology

作者： Xianyi Ren Yijun Zheng Tao Hu Jihong Zhang Shenzhen Key Laboratory of Visual Media Processing and Transmission Shenzhen Institute of Information Technology Shenzhen China College of Computer Science and Software Engineering Shenzhen University Shenzhen China

Nonsubsampled contourlet transform (NSCT) can provide flexible multiresolution, anisotropy, and directional expansion for images. Compared with the original contourlet transform, it is shift-invariant and can overcome the pseudo-gibbs phenomena around singularities. Fuzzy logic is an efficient intelligent method to handle uncertain information. In this paper, a novel image fusion algorithm is proposed based on the NSCT and fuzzy logic. Extensive experiments show that the proposed method can improve subjective and objective results compared to some other fusion approaches.

关键词： Fuzzy logic Image fusion Algorithm design and analysis Discrete wavelet transforms Fuzzy sets

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An improved SOM-based visualization technique for DNA microarray data analysis

An improved SOM-based visualization technique for DNA microa...

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International Joint Conference on Neural Networks (IJCNN)

作者： Jagdish C. Patra Jacob Abraham Pramod K. Meher Goutam Chakraborty School of Computer Engineering Nanyang Technological University Singapore Department of Communication Systems Institute for Infocomm Research Singapore Department of Software and Information Science Iwate Prefectural University Japan

Effective and meaningful visualization techniques are quite important for multidimensional DNA microarray gene expression data analysis. Elucidating the cluster properties of these multidimensional data are often complex. Patterns, hypotheses on the relationships, and ultimately of the function of the gene can be analyzed and visualized by non-linear reduction of the multidimensional data to a lower dimension. In this paper, an improved SOM visualization technique named Improved Side Intensity Modulated (ISIM) Self-Organizing Map (SOM) has been proposed and compared with other SOM based visualization techniques. On different datasets, ISIM-SOM is found to offer better cluster boundary, simplicity and clarity.

关键词： Data visualization Neurons Iris Gene expression Clustering algorithms Training DNA

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Novel Quality Measures for Image Fusion Based on Structural Similarity and Visual Attention Mechanism

Novel Quality Measures for Image Fusion Based on Structural ...

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International Conference on Multimedia Technology

作者： Xianyi Ren Xiujian Liu Tao Hu Jihong Zhang Shenzhen Key Laboratory of Visual Media Processing and Transmission Shenzhen Institute of Information Technology Shenzhen China College of Computer Science and Software Engineering Shenzhen University Shenzhen China

A novel objective quality for image fusion based on structural similarity and visual attention mechanism (VAM) is presented. By giving higher weight to the salient areas in the input images, the quality measure can estimate how much visual meaningful information is preserved in the fused image. The correlation analysis between objective measure and subjective evaluation showed that our measures are more consistent with human subjective evaluation.

关键词： Visualization Image fusion Humans Correlation Indexes Q measurement

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An Algorithm for Discrete State Sequence and Trajectory Optimization for Hybrid Systems with Partitioned State Space

An Algorithm for Discrete State Sequence and Trajectory Opti...

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2010 49th IEEE Conference on Decision and Control

作者： Benjamin Passenberg Marion Sobotka Olaf Stursberg Martin Buss Peter E. Caines Institute of Automatic Control Department of Electrical Engineering and Information Technology Technische Universitat Munchen Munchen Germany Institute of Control and System Theory Department of Electrical Engineering and Computer Science University of Kassel Kassel Germany Department of Electrical and Computer Engineering and the Center for Intelligent Machines McGill University Montreal Canada

ISBN: (纸本)9781424477456

An algorithm for hybrid optimal control is proposed that varies the discrete state sequence based on gradient information during the search for an optimal trajectory. The algorithm is developed for hybrid systems with partitioned state space. It uses a version of the hybrid minimum principle that allows optimal trajectories to pass through intersections of switching manifolds, which enables the algorithm to vary the sequence. Consequently, the combinatorial complexity of former algorithms can be avoided, since not each possible sequence has to be investigated separately anymore. The convergence of the algorithm is proven and a numerical example demonstrates the efficiency of the algorithm.

关键词： Switches Manifolds Trajectory Complexity theory Partitioning algorithms Convergence Aerospace electronics

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An Efficient and Secure Routing Protocol for Wireless Sensor Networks Using Multicasting

An Efficient and Secure Routing Protocol for Wireless Sensor...

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IEEE/ACM Int'l Conference on & Int'l Conference on Cyber, Physical and Social Computing (CPSCom) Green Computing and Communications (GreenCom)

作者： Sanjay K. Dhurandher Mohammad S. Obaidat Gaurav Jain Isha Mani Ganesh Vinay Shashidhar CAITFS Division of Information Technology Netaji Subhas Institute of Technology University of Delhi New Delhi India Department of Computer Science & Software Engineering Monmouth University NJ USA Division of Computer Engineering Netaji Subhas Institute of Technology University of Delhi New Delhi India

Recent technological advancements in the field of nanotechnology have increased the computation power of the wireless nodes while adhering to the energy constraints. This has made the use of the Wireless Sensor Networks (WSNs), more widespread, used in applications such as area monitoring, industrial monitoring, vehicle detection or military monitoring. Sensor nodes have made it possible to collect data even in hostile environments, but because of the severe security and energy constraints faced by sensor networks, their deployment on a large scale is still a tricky job. A secure energy efficient routing algorithm is thus the need of the hour. SPIN, Sensor Protocol for information via Negotiation, is one of the widely used energy efficient routing protocol in WSNs that completely ignores the security aspect. This paper involves proposing an alternate routing protocol, MS-SPIN, which incorporates the best features of SPIN while also addressing the security issue. The implementation of MS-SPIN in NS2 has shown that, for a larger number of nodes, its energy performance characteristics are comparable to those of SPIN while providing security features.

关键词： IP networks Wireless sensor networks Routing Security Routing protocols Energy efficiency

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Application of Logical Petri Nets in Web Service composition

Application of Logical Petri Nets in Web Service composition

引用

IEEE International Conference on Mechatronics and Automation

作者： ChangYan Zhu YuYue Du College of Information Science and Engineering Shandong University of Science and Technology Qingdao China State Key Laboratory of Computer Science institute of Software Chinese Academy and Sciences Beijing China Shandong University of Science and Technology Qingdao China

In the process of Web service composition, there are several cases about working up an atomic Web service; as well as the outputs of Web service have many possibilities because of the different requirements from users. In order to address these uncertainties, Logical Petri Net(LPN) is introduced into the system of Web service composition, these problems can be well solved using the LPN's feature-passing value indeterminacy. And a model of Web service composition is proposed with the technology of ontology and Agent. Based on this model, an approach of Web service composition is presented in this paper.

关键词： Web services Ontologies Petri nets information processing Delay OWL Fires

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An associative memory system for incremental learning and temporal sequence

An associative memory system for incremental learning and te...

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International Joint Conference on Neural Networks (IJCNN)

作者： Furao Shen Hui Yu Wataru Kasai Osamu Hasegawa State Key Laboratory for Novel Software Technology Jiangyin Information Technology Research Institute Nanjing University Nanjing China Department of Computer Intelligence and Systems Science Tokyo Institute of Technology Yokohama Japan Imaging Science and Engineering Laboratory Tokyo Institute of Technology Yokohama Japan

An associative memory (AM) system is proposed to realize incremental learning and temporal sequence learning. The proposed system is constructed with three layer networks: The input layer inputs key vectors, response vectors, and the associative relation between vectors. The memory layer stores input vectors incrementally to corresponding classes. The associative layer builds associative relations between classes. The proposed method can incrementally learn key vectors and response vectors; store and recall both static information and temporal sequence information; and recall information from incomplete or noise-polluted inputs. Experiments using binary data, real-value data, and temporal sequences show that the proposed method works well.

关键词： Associative memory Training Context Indexes Prototypes Humans Topology

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Using New Designed NLG Gate for the Realization of Four-bit Reversible Numerical Comparator

Using New Designed NLG Gate for the Realization of Four-bit ...

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2010 International Conference on Educational and Network Technology(2010教育与网络技术国际会议 ICENT 2010)

作者： Lihui Ni Zhijin Guan Wenjuan Li Xiaoyu Dai College of Electronics and Information Nantong University Nantong China College of Computer Science and Technology Nantong University Nantong China College of Software Engineering Harbin Institute of Technology Harbin China

ISBN: (纸本)9781424476602;9781424476619;9781424476626

The reversible gates, attracting people's attention increasingly, have been widely used in low-power CMOS design, optical computing and quantum computing. This paper introduces one 2*2 reversible gate named NLG gate, then designs a novel four-bit reversible numerical comparator circuit based on it. The character of NLG gate is that only when both of the inputs are the same, the value of the second output is 1. Since the proposed work is explored for the first time ever in literature, the contribution of this paper will create a new thread of research in the area of reversible logic circuit.

关键词： reversible gate NLG gate reversible numberical comparator

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Enhancing fairness: A novel C2C e-commerce community member reputation algorithm based on transaction social networks

Enhancing fairness: A novel C2C e-commerce community member ...

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IADIS International Conference WWW/Internet 2010

作者： Feng, Wangsen Zhang, Bei Xia, Yunni Li, Jiajing Meng, Tao Key Laboratory of Network and Software Security Assurance of Ministry of Education Computing Center Peking University Beijing 100871 China College of Computer Science Chongqing University Chongqing 400044 China School of Mechanical Electronic and Information Engineering China University of Mining and Technology Beijing 100083 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9789728939250

Today, almost all the C2C e-commerce community member reputation evaluating algorithms are time sensitive. The reputation of a community member is accumulated after transactions and the increment of reputation after a successful transaction is computed based on the score given by his or her transaction partner. Since people always tend to do business with those with high reputation value, the reputation of members joined in C2C community at different time will vary greatly although they may provide the same commodity quality and service. It is unfair to new comers. In this paper, we propose a novel algorithm to overcome the shortcoming. Based on the transaction social network, our algorithm employs the random walk strategy to compute member reputation and enhance system fairness. © 2010 IADIS.

关键词： Electronic commerce

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