根据水平截集和乐观指标，进行模糊区间运算。
Based on horizontal threshold sets and optimistic indices, the fuzzy operation is done.
此外，该方法较少地依赖符号计算，且核心算法是基于可靠的、数值的区间运算。
In addition, the core of the algorithm is based on reliable numerical interval operation.
从结构振动的瑞利商表达式出发，利用区间运算推导出结构特征值模糊变量的计算表达式。
From the Rayleigh quotient of structural vibration, the computation expression of fuzzy variable of structural characteristic is obtained on the basis of the principles of interval arithmetic.
根据水平截集和乐观指标，进行模糊区间运算，从而得出熵权，再根据熵权的大小对检修方案进行分析与评判。
Through fuzzy interval arithmetic based on level sets and optimistic index the entropy weight is given, then the thesis analyses and evaluates maintenance project according to entropy weight.
根据区间运算规则，将区间分析与有限元方法相结合，提出了非概率不确定的结构的一种区间有限元分析的方法。
From interval arithmetic, an analytical method of interval finite element of uncertain structure is presented by combining interval analysis with the finite element method.
可在不进行求导数运算的条件下，通过区间运算获得作战效能随武器装备的技术战术性能和作战使用方式改变而变化的情况。
The method can be used to obtain the change of operational effectiveness with technical performance of weapon system and the operation mode without using operations of partial derivatives.
可在不进行求导数运算的条件下，通过区间运算获得作战效能随武器装备的技术战术性能和作战使用方式改变而变化的情况。
The method can be used to obtain the change of operational effectiveness with technical performance of weapon system and the operation mode without using operations of partial derivatives.
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