【摘要】 介绍了BP网络模型、BP算法、BP算法存在的问题及其原因 .针对BP算法三个主要问题 (隐层数及隐层节点个数的难以确定、收敛速度较慢、易陷入局部极小点 )的改进方法进行了探讨 ,提出了动量法、遗传算法、混沌法等方法 .更多还原

【Abstract】 The paper introduces BP network model, BP algorithm, the problems and causes of BP algorithm. Then in terms of the three main shortages, i.e. hide layer uncertainty, slow convergence, local minima, some improvement methods are systemically discussed in detail, such as momentum method, genetic algorithm, and chaos.更多还原