area theorem

On the basis,making use of the principle of the area rate to modify the mathematic model.

通过对蜗壳内水力损失模型的分析,建立了蜗壳内水力损失的数学表达式,指出蜗壳内的水力损失为叶轮出口几何参数及蜗壳喉部面积的函数,其大小受叶轮与蜗壳间匹配关系的影响,并以此为依据,利用面积比原理对建立的数学表达式进行了修正。

In this paper the errors in formula (2) are detected by analysis made on the principle of area substitution,and methods for reducing errors is presented which are capable of a higher degree of accuracy in maximum proximation for Gaussian distribu- tion and fractile formula.

本文在面积替代原理的基础上分析其产生误差的原因和改进的方法。

Introduction was made to the method of sine pulse width modulation (SPWM) wave generated by table searching, which is based on area equivalence principle.

介绍了一种基于面积等效原理,采用查表法产生正弦脉宽调制(SPWM)波的方法。