method of trapezoid meaning in English

梯形法

Secondly , ranging fuzzy numbers are introduced by several methods . thirdly , rangking methods of fuzzy numbers are extended and put the methods into comparition of inequality practice and the method of trapezoid fuzzy numbers comparition is extended . at last , we use two statistical confidence intervals to derive level interval - valued fuzzy numbers , and get another linear programming problem
本文首先综述了模糊线性规划问题中的一些方法和有关模糊数排序的几种方法，然后对模糊数的一些排序方法做了推广，重点讨论了模糊数不等式的问题，最后给出了基于置信区间的一种模糊线性规划问题。