改进的BP神经网络算法，基于拟牛顿算法。-Improved BP neural network algorithm, based on the quasi-Newton algorithm.

CRFsuite: a fast implementation of Conditional Random Fields (CRFs) CRFSuite is an implementation of Conditional Random Fields (CRFs) for labeling sequential data. The first priority of this software is to train and use CRF models as fast as possi

一种基于拟Newton法解非线性方程组的数值算法-A numerical method for solution of nonlinear equations based on quasi Newton method