说明：  Hopf field神经网络是一种互连型神经网络，其演变过程是一个非线性动力学系统，可以用一组非线性差分方程描述(离散型)或微分方程(连续型)来描述。
(Hopf field neural network is an interconnected neural network. Its evolution process is a nonlinear dynamic system. It can be described by a set of nonlinear difference equations (discrete type) or differential equations (continuous type).)