nonlinearityn.非线性nonlinearadj.非线性的nonlinear inverse model非线性逆模型nonlinearly chirped FBG非线性啁啾光纤光栅nonlinear stabilization非线性稳定化nonlinearity regression非线性回归nonlinear friction mode非线性摩擦力模型nonlinear heat equation非线性热方程nonlinear geostatistics非线性地质统计学nonlinear fluid damping非线性流体阻尼力nonlinear dual porosity非线性双重介质nonlinear model of soil土体非线性模型