This paper deals with a complex third order linear measure differential equation id(y')* + 2iq(x)y'dx + y(idq(x) + dp(x)......

从非简谐振子模型出发，通过求解迭代方程计算出三阶非线性极化率及四阶非线性极化率，并给出了高阶非线性极化率的普适公式。......