动作筛选条件是自订属性，提供宣告式方法将动作前和动作后的行为加入控制器动作方法中。

Action filters are custom attributes that provide a declarative means to add pre-action and post-action behavior to controller action methods.

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仿真结果表明：非线性变结构控制器给出了满意的静态和动态行为和很好的鲁棒性。

Simulation results show that the nonlinear variable structure excitation controller and steam valving controller give satisfactorily static and dynamic performances and good robustness.

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仿真结果表明：非线性变结构控制器给出了满意的静态和动态行为和很好的鲁棒性。

Simulation results show that the nonlinear variable structure excitation controller and steam valving controller give satisfactorily static and dynamic performances and good robustness.

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