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Non-linear system modeling using LSTM neural networks

机译:使用LSTM神经网络的非线性系统建模

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Long-Short Term Memory (LSTM) is a type of Recurrent Neural Networks (RNN). It takes sequences of information and uses recurrent mechanisms and gate techniques. LSTM has many advantages over other feedforward and recurrent NNs in modeling of time series, such as audio and video. However, in non-linear system modeling normal LSTM does not work well(Wang, 2017). In this paper, we combine LSTM with NN, and use the advantages. The novel neural model consists of hierarchical recurrent networks and one multilayer perceptron. We design a special learning algorithm which uses backpropagation, and backpropagation through time methods. We use two non-linear system examples to compare our neural modeling with other well known methods. The results show that for the simulation model (only the test input is used and the past test output is not used), the modified LSTM model proposed in this paper is much better than the other existing neural models.
机译:长期记忆(LSTM)是一种递归神经网络(RNN)。它采用信息序列,并使用递归机制和门技术。在时间序列建模(例如音频和视频)方面,LSTM与其他前馈和递归NN相比具有许多优势。但是,在非线性系统建模中,常规LSTM效果不佳(Wang,2017)。在本文中,我们将LSTM与NN相结合,并利用了这些优势。新的神经模型由分层递归网络和一个多层感知器组成。我们设计了一种特殊的学习算法,该算法使用反向传播,以及通过时间方法进行反向传播。我们使用两个非线性系统示例将我们的神经模型与其他众所周知的方法进行比较。结果表明,对于仿真模型(仅使用测试输入,不使用过去的测试输出),本文提出的改进的LSTM模型比其他现有的神经模型要好得多。

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