First, traditional PID variable variable pitch control system and conventional fuzzy variable pitch control system are established.

本文首先建立了PID变桨距控制系统和常规的模糊变桨距控制系统。

youdao

Returns a Boolean value indicating whether a variable variable: a named storage location capable of containing data that can be modified during program execution.

返回布尔值，指明变量变量：已命名存储位置，所包含的数据能够在程序执行过程中发生变动。

youdao

Variables are always assigned by value, which means that when one variable is set equal to another variable, they are then independent of each other.

变量始终是由值指定的，这意味着设置一个变量等于另一个变量后，它们就相互独立。

youdao

"The bank will estimate its costs based on its fixed costs, variable costs, the cost of their employees, the rent and so on and so forth.

VOA: special.2009.12.11

OK. So if we have variables, one of the questions we can ask is, what's the type of the variable.

好，如果我们有了一个变量，我们要问的问题之一就是，这个变量的类型是什么？

麻省理工公开课 - 计算机科学及编程导论课程节选

All right? The first one is, that test has to involve-- shouldn't have to, the value of some variable.

好不好？第一件事是，循环开始的测试必须必须-不是一定，一些变量的值。

麻省理工公开课 - 计算机科学及编程导论课程节选

Time is fixed and the learning is variable, when what we need is a system that makes time variable so that the learning can be fixed.

FORBES: Clearing the Path for Learning

In economics we can often observe the fact that a dependent variable is not always able to move immediately after a fortuitous change in an independent variable.

FORBES: America Is Not Happy With 103K New Jobs

Variable by variable, below shows how the countries stacked up.

FORBES: New Social Inclusion Survey Puts U.S. On Par With...Guatemala?