拟离散模的子模的任何两个余闭包是超视的，因而是同构的；

Any two co closures of a submodule of quasi discrete module M are superspective, and hence isomorphic;

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导出了关于混合模的耦合边界积分方程组及其退化形式，并用矩量法将之离散为齐次代数方程组，从而得波导的混合模传输常数；

The coupled boundary integral equations and their reduced forms are deduced for hybrid mode problems, and these equations are discreted into a system of linear algebraic equations by moment method.

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针对网络化控制系统中存在的网络诱导时延问题，提出了一种离散滑模控制方法。

A discrete sliding mode control is proposed for the problem of network-induced time delays in networked control systems.

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