The distortion tendency under different welding method, sequence and parameters are compared so that the basis of selecting optimum welding method to prevent welding distortion is provided.
通过不同的焊接方法、焊接顺序和工艺参数下焊接变形趋势的比较，为选择最佳的焊接方法和工艺提供了依据。
We use mainly the squariance method among sequence samples cluster analysis and the method of optimum partition, and combine the standard of release level of seismology strain energy to divide it.
主要使用了有序样品聚类分析中的离差平方和法、最优分割法，再结合地震学应变能释放水平进行划分。
By fuzzy set theory and the method of hierarchy with sequence tree, anew mode is proposed in which environment affects optimum seeking evaluation.
本文应用模糊集合论理论和构造层次有序树方法，提出了环境影响优选评价的新模式。
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