In this paper is given an evaluation formula for a kind of infinite integrals by applying parametricvariable integrals.
本文应用含参变量积分的方法，给出了一类无穷积分的求值公式。
2
It is given a evaluation formula for a class of infinite integrals by applying ParametricVariable integral transformation.
应用含参变量积分变换的方法，给出了一类无穷积分的求值公式。
3
The regulating rule for parametricvariable PID which is successfully applied to the computer excitative regulator is studied and analyzed by means of computer emulation.