The invention discloses a short-term traffic flow prediction method based on improved LSTM. The method comprises the following steps: (1) determining a forgotten door; (2) determining an input gate; (3) determining an output gate and a to-be-reserved information vector; (4) updating the cell state c; (5) obtaining a hidden layer output value; and (6) obtaining an output value of the storage unit. An output gate of the LSTM mainly uses a sigmoid activation function to determine which data is used for outputting, tanh function activation is a result of downward translation and contraction of the sigmoid function, the characteristics of the two activation functions are basically the same, and the tanh activation function is researched to replace the activation function of the output gate, so that two steps of determining a vector with reserved information and determining the output gate can be combined, that is to say, the calculation of two parameters can be reduced by replacing zt, and the operation speed is improved.
一种基于改进LSTM的短时交通流预测方法,包括以下步骤:(1)确定遗忘门;(2)确定输入门;(3)确定输出门及待保留信息向量;(4)更新细胞状态c;(5)获得隐藏层输出值;(6)获得存储单元输出值。LSTM的输出门主要是用sigmoid激活函数来确定哪些数据用来输出,tanh函数激活是sigmoid函数向下平移和收缩的结果,2个激活函数特性基本相同,研究用tanh激活函数替代输出门的激活函数,即可将确定带保留信息向量与确定输出门2个步骤进行合并,即用zt替代可以减少2个参数的计算,提高运算速度。
Short-term traffic flow prediction method based on improved LSTM
一种基于改进LSTM的短时交通流预测方法
2021-04-27
Patent
Electronic Resource
Chinese
IPC: | G06Q Datenverarbeitungssysteme oder -verfahren, besonders angepasst an verwaltungstechnische, geschäftliche, finanzielle oder betriebswirtschaftliche Zwecke, sowie an geschäftsbezogene Überwachungs- oder Voraussagezwecke , DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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