中文说明：L-M(列文伯格-马夸尔特法)非线性最优化方法，能够最快最优的获得单个或多个非线性方程的最优解，常用于曲线的拟合，最优化问题的鉴定求解等领域。附件中有算法实现的源码以及测试码，还有对该算法的整体阐述。分别对于有约束和无约束问题做了相应的测试，比较全面的实现了L-M方法的具体应用。
English Description：
LM (Levenberg - Marquardt method) nonlinear optimization method that can get the fastest optimal single or multiple optimal solutions of nonlinear equations, commonly used in curve fitting, optimization problems identified solving other fields. There annex algorithm source code and test code, and set forth the overall algorithm. Were constrained and unconstrained for the issue to do the appropriate tests comparing the full realization of the specific application of LM methods.