Man Sun

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by the migration mechanisms of ecosystems, various extensions to biogeography-based optimization (BBO) are proposed. BBO is an original optimization method based on the mathematical model of organism distribution in biological systems. BBO is an evolutionary process that achieves information sharing by species migration. This paper generalizes the(More)
Path-finding consumes a significant amount of resources, especially in movement-intensive games such as (massively) multiplayer games. We investigate several path-finding techniques, and explore the impact on performance of workloads derived from real player movements in a multiplayer game. We find that a map-conforming, hierarchical path-finding strategy(More)
— In this paper, the robust H∞ control problem is considered for uncertain neutral systems with discrete and distributed time delays. By using new Lyapunov-Krasovskii functionals, some sufficient conditions on H∞ robust performance analysis are given in terms of linear matrix inequalities (LMIs). Based on these conditions the dynamical output feedback(More)
By functional analysis and eigenvalue analysis methods in complex plane, several useful criteria are deduced which can guarantee that all the eigenvalues of discrete time-delay systems are located in a given region D(α, r) (with center (α,0) and radius r ) in the cases that the system matrix A is diagonalizable and A is a normal matrix. These(More)
— In this paper, new separated delay-dependent H2 performance criterion is derived for a class of discrete time-delay systems. When used in robust synthesis for real polytopic uncertainty, it can rule out the technical restriction of using a single Lyapunov function to some extent, and therefore, lead to potentially less conservative linear matrix(More)
In this paper, new separated H<inf>&#x221E;</inf> performance criterion and D-stability criterion are derived. When used in robust synthesis for real polytopic uncertainty, they can reduce conservativeness inherent in the classical quadratic method by providing a parameter-dependent Lyapunov function, and therefore, lead to potentially less conservative(More)
In this paper, the problem of H<inf>&#x221E;</inf> dynamic output feedback control is considered for time-delay systems. First, a new method is proposed to obtain the H<inf>&#x221E;</inf> performance criterion with decoupling structure, based on which the dynamic output feedback H<inf>&#x221E;</inf> controller is designed. Then, the results are extended to(More)
This paper considers the problem of persistent bounded disturbance rejection for a class of time-delay systems with para-metric uncertainty by Lyapunov function and positively invariant set analysis method. Sufficient conditions for internal stability and L 1 −performance analysis are given in terms of linear matrix inequalities (LMIs). Based on the(More)