The sufficient necessary conditions are given for a fuzzy controller to be a universal fuzzy approximator. 给出由规则并算子构造的控制器是泛模糊逼近器的充要条件。
The author of this article finds a necessary and sufficient condition of the independece of random variables by using the three lemmas. 利用三个引理,作者找到随机变量独立性的一个充要条件。