RBF网络是一种三层前向网络，由输入到输出的映射是非线性的，而隐含层空间到输出空间的映射是线性的，从而大大加快了学习速度并避免局部极小问题。-RBF network is a three-forward network　input to output mapping is nonlinear, and output space mapping space to the hidden layer is linear, which greatly accelerates the learning speed and avoid local minima problems.