This paper focuses on a study of the classification method of natural disaster in the view of attribute interval recognition theory.
从属性区间识别理论的角度，探讨了自然灾害的等级划分方法。
Under a particular social economic circumstance, there is some appropriate and feasible interval of interest rates without abstract natural interest rates.
抽象的自然利率终属子虚乌有，而在一定的社会经济条件下，却存在适度的、可行的利率区间。
An interval analysis method was proposed for the influence analysis of the model error to the computational results of natural frequency of structures.
给出了一定误差水平下的模型误差对固有频率计算结果影响程度分析的区间方法。
The pounding force spectra after given damping ratio, interval, and time delay, were plotted according to the natural frequencies.
针对阻尼比、间隔距离、时间迟滞，计算了不同的固有频率下的碰撞力峰值，绘制出碰撞力响应谱。
In chapter 6, an interval optimization method of dynamic response for uncertain structures with natural frequency constraints is presented.
第六章针对区间参数振动结构提出了一种具有频率约束的动力响应的区间优化方法。
In chapter 6, an interval optimization method of dynamic response for uncertain structures with natural frequency constraints is presented.
第六章针对区间参数振动结构提出了一种具有频率约束的动力响应的区间优化方法。
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