GN算法和LM算法

最速下降，牛顿法：https://mp.weixin.qq.com/s?__biz=MzIxOTczOTM4NA==&mid=2247485041&idx=1&sn=9268b9a0aa90b4f64f216e08ef64f63d&chksm=97d7e3e6a0a06af0f33720bc8d9ca4e4a07ca0a8e7c8a6b0b4d7261e03fb5e1ee564ae367b44&scene=21#wechat_redirect

GN，LM：https://mp.weixin.qq.com/s?__biz=MzIxOTczOTM4NA==&mid=2247485075&idx=1&sn=f664e241d0b6b7e59b0f3e6195fef2c7&chksm=97d7e304a0a06a12ef02f49f05945b78fea81723e92077bb7adac9e6b5bae2b36763570ab190&scene=21#wechat_redirect
[Nonlinear Least Squares][https://www.youtube.com/watch?v=8evmj2L-iCY]

Example:
[system of nonlinear equations - Newton's method][https://www.youtube.com/watch?v=-Ws7cEH7w_U]
[Newton's method for solving nonlinear systems of Algebraic equations][https://www.youtube.com/watch?v=zPDp_ewoyhM]