“…where t is the current moment; σ represents the sigmoid function; h T−1 and c t−1 represent the hidden vector of the previous moment, respectively; i t representative enter door; W I x, W I h, W I c, b I are, respectively, corresponding to the weighting matrix and deviation; the same, f t forgotten door, W x f , W h f , W f c, b f , respectively, correspond to the weighting matrix and deviation; c t is the cell state at time t; o t represents the output gate, W x o, W ho , W o c, b o , respectively, correspond to the weighting matrix and deviation. Finally, the results obtained from the forward LSTM and the backward LSTM are spliced together through (13) to (19) to obtain h i :…”