Consider the distributed parameter system described by the second order partial differential equation of composed type, we discuss its a boundary optimal control problem with quadratic performance.

考虑用二阶复合型偏微分方程所描述的分布参数系统，研究了它的一个使平方性能指标达到最小值的边界最优控制问题。

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This paper proves the existence, uniqueness and periodic problem of the solution about second order singular perturbation system by using the differential inequality.

本文用微分不等式证明了二阶奇摄动系统解的存在性、唯一性和周期性。

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In the second chapter, we study an infinite delay differential equation, the system was widely applied in the biology, neural network and some other fields.

第二章是研究一类无穷时滞微分系统，此系统在生物，神经网络等领域中都有广泛应用。

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