针对标准 算法存在的缺陷，本文给出了基于matlab语言的神经网络几种改进的算法- 阐述了各种算法的优化技术原理、优缺点，并就它们的训练速度和内存消耗情况作了比较-According to the defects of standard algorithm, this paper presents the neural network based on matlab language several improvement algorithm, expounds the optimization