该模型是一个偏微分方程系统的自由边界问题。
The model is a free boundary problem for a system of partial differential equations.
本文获得了一类中立型偏微分方程系统解振动的若干充分条件。
In this paper, some sufficient conditions are obtained for the oscillation solutions of systems with high order partial differential equations of neutral type.
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。
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.
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