有CDF三角函数曲线/三维曲线图，基于分段非线性权重值的Pso算法，使用大量的有限元法求解偏微分方程，利用贝叶斯原理估计混合logit模型的参数。- There CDF trigonometric curve/3D graphs, Based on piecewise nonlinear weight value Pso algorithm, Using a large number of finite element method to solve partial differential equations, Bayesian parameter estimation principle mixed logit model.