nonlinearityn.非线性nonlinearadj.非线性的nonlinear sliding mode非线性滑模nonlinear paramagnetic非线性顺磁性nonlinear perturbation非线性扰动nonlinear equation set非线性方程组nonlinear prograngning非线性规划nonlinear equalization非线性等化nonlinear relationship非线性关系nonlinear least square非线性最小平方nonlinear normal modes非线性模态nonlinear permittivity非线性介电常数