“…Table IV shows the frequent use of deep learning algorithms in emotional recognition in research. [19], [20], [21], [22], [5], [23], [24], [25], [26], [27], [28], [5], [4], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38] CNN + GoogleNet [39], [40], [41], [42] CNN + VGG 19 [43], [44], [27], [28], [5], [42] CNN + VGG There is also SHCNN which uses Leaky ReLU to avoid the "Dead ReLU problem" which can bring better convergence on the dataset [65]. CNN can also combine with CRBM and Transfer Learning.…”