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. 2018 May 22;18(5):1654. doi: 10.3390/s18051654

Figure 3.

Figure 3

(a) A cyclic connection of a recurrent neural network (RNN) folded and unfolded. (b) An long short-term memory (LSTM) memory block consisting of one cell at time t and the three gates (it, ot, and ft) which control the activation of the cell ct and its output ht.