Non-convex: The evolutionary direction of a system, under certain conditions, will depend on a particular state function. For example, the energy function, whose extremum corresponds to the relatively stable state of the system. Non-convexmeaning means that this function has multiple extremums, so the system has multiple stable equilibrium states, which will lead to the diversity of system evolution.<br>The artificial neural network model mainly considers the topology of network connection, the characteristics of neurons, learning rules and so on. At present, there are nearly 40 neural network models, including back-transmission network, perceptible, self-organizing mapping, Hopfield network, Borzman machine, adaptive resonance theory and so on. According to the topology of the connection, the neural network model can be divided into.
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