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198 results on '"TANG, WALLACE K. S."'

2. Controllability of networked MIMO systems

Author

Wang, Lin, Chen, Guanrong, Wang, Xiaofan, and Tang, Wallace K. S.

Subjects
Computer Science - Systems and Control
Abstract

In this paper, we consider the state controllability of networked systems, where the network topology is directed and weighted and the nodes are higher-dimensional linear time-invariant (LTI) dynamical systems. We investigate how the network topology, the node-system dynamics, the external control inputs, and the inner interactions affect the controllability of a networked system, and show that for a general networked multi-input/multi-output (MIMO) system: 1) the controllability of the overall network is an integrated result of the aforementioned relevant factors, which cannot be decoupled into the controllability of individual node-systems and the properties solely determined by the network topology, quite different from the familiar notion of consensus or formation controllability; 2) if the network topology is uncontrollable by external inputs, then the networked system with identical nodes will be uncontrollable, even if it is structurally controllable; 3) with a controllable network topology, controllability and observability of the nodes together are necessary for the controllability of the networked systems under some mild conditions, but nevertheless they are not sufficient. For a networked system with single-input/single-output (SISO) LTI nodes, we present precise necessary and sufficient conditions for the controllability of a general network topology., Comment: 15 pages, 4 figures

Published
2015

3. A Comparative Study of IXP in Europe and US from a Complex Network Perspective

Author

Fan, Zhongyan, Tang, Wallace K. S., Lin, Dong, Li, Doujie, Kacprzyk, Janusz, Series editor, Pal, Nikhil R., Advisory editor, Bello Perez, Rafael, Advisory editor, Corchado, Emilio S., Advisory editor, Hagras, Hani, Advisory editor, Kóczy, László T., Advisory editor, Kreinovich, Vladik, Advisory editor, Lin, Chin-Teng, Advisory editor, Lu, Jie, Advisory editor, Melin, Patricia, Advisory editor, Nedjah, Nadia, Advisory editor, Nguyen, Ngoc Thanh, Advisory editor, Wang, Jun, Advisory editor, Meesad, Phayung, editor, Sodsee, Sunantha, editor, and Unger, Herwig, editor

Published
2018
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48. Emulating 'Chaos Chaos Order' in Chen's Circuit of Fractional Order by Parameter Switching.

Author

Tang, Wallace K. S. and Danca, Marius-F.

Subjects
*CHAOS theory, *FRACTIONAL calculus, *ALGORITHMS, *ELECTRONIC circuits, *SWITCHING circuits, *ATTRACTORS (Mathematics)
Abstract

In this paper, the effect of the parameter switching (PS) algorithm in a fractional order chaotic circuit is investigated both in simulation and experiment. The Chen system of fractional order is focused and realized in an electronic circuit. By designing a switching circuit, the PS algorithm is implemented and it is the first time, the paradoxical 'Chaos Chaos Order' is presented in an electronic circuit. Both the simulation and experimental results confirm that the obtained attractor under switching approximates the attractor of the time-averaged model. Some important design issues for the circuitry realization of the PS scheme are pointed out. Finally, our work confirms the practical usage of PS algorithm in potential applications such as attractor synthesis and chaos control. [ABSTRACT FROM AUTHOR]

Published
2016
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