Triple integral expression of the radiation impedance of square piston is deduced and the numerical results of the radiation impedance are calculated with the method of Gaussian numerical integral.
利用高斯数值积分方法，推导了方形活塞辐射阻抗的三重积分表达式，计算了方形活塞声源的辐射阻抗。
2
It is an new technology to use synchrotron radiation lithograph for making large scale integral circuit.
在进行大规模集成电路光刻时，采用同步辐射光源是一项新技术。
3
Secondly, without absorbing boundary conditions, radiation conditions are satisfied automatically in the integral equation by the Green's function.