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, the delay-dependent robust control problem is considered for time-delay systems with polytopic uncertainty. Robust stabilizing controller and robust H ∞ controller are designed by using a parameter-dependent Lyapunov function that can reduce the conservativeness when used in robust performance analysis and synthesis problems for polytopic(More)