论二次积分如何还原成二重积分再重新交换积分顺序

On Re-exchanging Integral Order After Quadratic Integral Being Reverted to Double Integral

在计算二次积分时,有时会遇到如果直接按照已给的积分顺序去计算是很繁琐的,甚至可能无法计算出结果。文中主要讨论二次积分在还原成二重积分后重新改变积分顺序时应注意的问题,否则会得出错误的结果。

It’s tedious,sometimes,to calculate quadratic integral according to the given integral order and even the results cannot be figured out.This paper focuses on the notable problems when the integral order is exchanged after quadratic integral being reverted to double integral.Otherwise,the wrong results will be obtained.