Selecting qualitative or quantitative targets that are sensitive to a certain region, appraisal synthetically with the method of indistinct mathematics.
选择对某地区较敏感的定性或定量指标，运用模糊数学的方法进行综合评判。
The calculating example shows that a stable stress intensity factor can be obtained by selecting a proper calculating boundary and changing the geometric scale of the region.
计算实践表明：选择适当的计算边界，用改变计算区域几何比例的方法可以求得稳定的应力强度因子。
In this algorithm, sample region density is introduced. Weight vectors are updated under the condition of selecting samples with different probability according to their density.
该算法引入样本区域密度的概念，根据密度大小按不同的概率选取样本，以修正权矢量。
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