介绍了推广的梯形模糊数并证明了它的一些性质。利用推广的梯形模糊数逼近任意给定的一个模糊数,指出梯形逼近共有四种情形,给出了更具体、更直观的计算最近的梯形逼近的方法和例子。
This paper introduces the extended trapezoidal fuzzy number, and proves some properties of it. By using the extended trapezoidal fuzzy number to approximate any given fuzzy number, it is pointed that there are four cases on trapezoidal approxi-mation, and a more detailed and more intuitive method to compute trapezoidal approximation and related examples are given.