The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
K M Passino - One of the best experts on this subject based on the ideXlab platform.
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stability of a one Dimensional Discrete time asynchronous swarm
Systems Man and Cybernetics, 2005Co-Authors: Veysel Gazi, K M PassinoAbstract:In this correspondence, we consider a Discrete time one-Dimensional asynchronous swarm. First, we describe the mathematical model for motions of the swarm members. Then, we analyze the stability properties of that model. The stability concept that we consider, which matches exactly with stability of equilibria in control theory, characterizes stability of a particular position (relative arrangement) of the swarm members. We call that position the comfortable position (with comfortable intermember distances). Our swarm model and stability analysis are different from other asynchronous swarm models considered in the literature. In particular, in our analysis we employ results on contractive mappings from the parallel and distributed computation literature. The application of these results to the swarm coordination problem is important by itself since they might prove useful also in n-Dimensional swarms.
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stability of a one Dimensional Discrete time asynchronous swarm
International Symposium on Intelligent Control, 2001Co-Authors: Veysel Gazi, K M PassinoAbstract:In this article we consider a Discrete time one-Dimensional asynchronous swarm. First, we describe the mathematical model for motions of the swarm members. Then, we analyze the stability properties of that model. The stability concept that we consider, which matches exactly with stability of equilibria in control theory, characterizes stability of a particular position (relative arrangement) of the swarm members, that we call the comfortable position (with comfortable intermember distance). Our stability analysis employs some results on contractive mappings from the parallel and distributed computation literature.
Jian Liu - One of the best experts on this subject based on the ideXlab platform.
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efficient architectures for two Dimensional Discrete wavelet transform using lifting scheme
IEEE Transactions on Image Processing, 2007Co-Authors: Chengyi Xiong, Jinwen Tian, Jian LiuAbstract:Novel architectures for 1-D and 2-D Discrete wavelet transform (DWT) by using lifting schemes are presented in this paper. An embedded decimation technique is exploited to optimize the architecture for 1-D DWT, which is designed to receive an input and generate an output with the low- and high-frequency components of original data being available alternately. Based on this 1-D DWT architecture, an efficient line-based architecture for 2-D DWT is further proposed by employing parallel and pipeline techniques, which is mainly composed of two horizontal filter modules and one vertical filter module, working in parallel and pipeline fashion with 100% hardware utilization. This 2-D architecture is called fast architecture (FA) that can perform J levels of decomposition for N*N image in approximately 2N2(1-4-J)/3 internal clock cycles. Moreover, another efficient generic line-based 2-D architecture is proposed by exploiting the parallelism among four subband transforms in lifting-based 2-D DWT, which can perform J levels of decomposition for N*N image in approximately N2(1-4-J )/3 internal clock cycles; hence, it is called high-speed architecture. The throughput rate of the latter is increased by two times when comparing with the former 2-D architecture, but only less additional hardware cost is added. Compared with the works reported in previous literature, the proposed architectures for 2-D DWT are efficient alternatives in tradeoff among hardware cost, throughput rate, output latency and control complexity, etc
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efficient high speed low power line based architecture for two Dimensional Discrete wavelet transform using lifting scheme
IEEE Transactions on Circuits and Systems for Video Technology, 2006Co-Authors: Chengyi Xiong, Jinwen Tian, Jian LiuAbstract:Efficient line-based architectures for two-Dimensional Discrete wavelet transform (2-D DWT) are presented in this paper. We first present a four-input/four-output architecture for direct 2-D DWT that 1-level decomposition of a N/spl times/N image could be performed in approximately N/sup 2//4 intra-working clock cycles (ccs), where the parallelism among four subbands transforms in lifting-based 2-D DWT is explored. By using this four-input/four-output architecture, we propose a novel pipelined architecture for multilevel 2-D DWT that can perform a complete dyadic decomposition of N/spl times/N image in approximately N/sup 2//4 ccs. Performance analysis and comparison results demonstrate that, the proposed architectures have faster throughput rate and good performance in terms of production of throughput rate and hardware cost, as well as hardware utilization. The proposed pipelined architecture could be an efficient alternative for high-speed and/or low-power applications.
Youqing Wang - One of the best experts on this subject based on the ideXlab platform.
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fault diagnosis and compensation for two Dimensional Discrete time systems with sensor faults and time varying delays
International Journal of Robust and Nonlinear Control, 2017Co-Authors: Dong Zhao, Dong Shen, Youqing WangAbstract:Summary A fault diagnosis and compensation problem for two-Dimensional Discrete time systems with time-varying state delays is studied in this paper. The concerned two-Dimensional systems are described by the Fornasisi–Marchesini second model and are subject to unknown disturbances. First, a fault detection and diagnosis module is designed to obtain the information on sensor faults; a new fault detection and diagnosis integrated design, using the observer based on descriptor system approach, is proposed to detect and estimate the sensor faults. The integrated design can maximize the fault detection rate for a given false alarm rate. Sufficient conditions for the existence of the integrated fault detection and diagnosis design are derived in the context of norm evaluation and provided in terms of matrix inequalities. Second, a fault-tolerant control module is proposed upon an existing output feedback controller. When the sensor fault occurs, the faulty measurement can be identified and corrected by the proposed fault detection and diagnosis module. In this case, the feedback controller can guarantee the performance of the closed-loop system even when encountering sensor faults. Finally, the proposed method is applied to a thermal process to illustrate its effectiveness. Copyright © 2017 John Wiley & Sons, Ltd.
Norio Konno - One of the best experts on this subject based on the ideXlab platform.
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One-Dimensional Discrete-time quantum walks on random environments
Quantum Information Processing, 2009Co-Authors: Norio KonnoAbstract:We consider Discrete-time nearest-neighbor quantum walks on random environments in one dimension. Using the method based on a path counting, we present both quenched and annealed weak limit theorems for the quantum walk.
Veysel Gazi - One of the best experts on this subject based on the ideXlab platform.
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stability of a one Dimensional Discrete time asynchronous swarm
Systems Man and Cybernetics, 2005Co-Authors: Veysel Gazi, K M PassinoAbstract:In this correspondence, we consider a Discrete time one-Dimensional asynchronous swarm. First, we describe the mathematical model for motions of the swarm members. Then, we analyze the stability properties of that model. The stability concept that we consider, which matches exactly with stability of equilibria in control theory, characterizes stability of a particular position (relative arrangement) of the swarm members. We call that position the comfortable position (with comfortable intermember distances). Our swarm model and stability analysis are different from other asynchronous swarm models considered in the literature. In particular, in our analysis we employ results on contractive mappings from the parallel and distributed computation literature. The application of these results to the swarm coordination problem is important by itself since they might prove useful also in n-Dimensional swarms.
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stability of a one Dimensional Discrete time asynchronous swarm
International Symposium on Intelligent Control, 2001Co-Authors: Veysel Gazi, K M PassinoAbstract:In this article we consider a Discrete time one-Dimensional asynchronous swarm. First, we describe the mathematical model for motions of the swarm members. Then, we analyze the stability properties of that model. The stability concept that we consider, which matches exactly with stability of equilibria in control theory, characterizes stability of a particular position (relative arrangement) of the swarm members, that we call the comfortable position (with comfortable intermember distance). Our stability analysis employs some results on contractive mappings from the parallel and distributed computation literature.
