A sufficient condition of stability in analytical form for arbitrary number of modes is obtained.

导出适用于任意阶模态的解析形式稳定性充分条件。

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Highly precise solutions both in time and in space can be reached by solving wave equation with high order finite difference scheme of staggered grid under the condition of stability.

用交错网格的高阶有限差分方法解波动方程，在满足稳定性要求时，可获得时间和空间都是高阶精度的结果。

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The paper analyses the implementary arithmetic in the servo system with saturation and lag segment, and analyses the performance of the close loop to obtain the condition of stability and robustness.

详细分析了预测函数控制在具有参数饱和限制环节和滞后的机电伺服系统中的实施算法，分析了系统的闭环性能，并得到了其稳定鲁棒性条件。

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