在设计解此类问题的数值方法时，我们不得不考虑方法的这样三个特征：代数阶，周期稳定性以及相延迟性质，特别是相延迟性质。
When designing a numerical method for these problems, we have to consider three important features: algebraic order, periodicity stability and phase-lag, especially the phase-lag property.
特征技术为实现CAD系统和生命周期设计系统的集成开辟了新的道路。
The feature based modeling technology is found a new way to realize the integration of CAD system and life cycle design system.
在对其进行分析研究的基础上，提出等效特征周期的方法，使一般的设计软件能方便使用地震安全性评价结果。
The method of equivalent characteristic period is suggested in this article, thus to enable an easy application of evaluation results of seismic safety.
竖向与水平向地震动分量卓越周期的比值在0.7 - 0.9之间，竖向设计反应谱的特征周期应有单独规定。
The ratio of vertical and horizontal predominant period is 0.7-0.9, so independent characteristic period of vertical design response spectrum should be defined.
以面向模块和功能分析为主要特征的模块化设计能够缩短开发周期、减少制造成本，已经基本完成由思想向技术的转变。
Modular design can quicken the development of productions and decrease the manufacturing cost and has completed the transformation from a kind of thinking to a method.
以面向模块和功能分析为主要特征的模块化设计能够缩短开发周期、减少制造成本，已经基本完成由思想向技术的转变。
Modular design can quicken the development of productions and decrease the manufacturing cost and has completed the transformation from a kind of thinking to a method.
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