梯形模糊数是为了解决不确定环境下的问题，由Zadeh在1965年提出的概念。
引入广义梯形模糊数描述风险等级，增加了评价者的置信度指标。
The paper introduces generalized trapezoidal fuzzy number to describe risk rate, which adds a degree of confidence of estimators opinion.
采用梯形模糊数估计配变负荷变化情况，建立了单相线路网络模型。
A trapezoid fuzzy figure is adopted to estimate the load change of distribution transformer and the single-phase distribution network model is constructed.
本文讨论了基于三角形模糊数的模糊约束条件和基于梯形模糊数的模糊费用。
Fuzzy constraints based triangular fuzzy Numbers and the fuzzy cost based trapeze fuzzy Numbers are discussed in this paper.
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