Table 2.

List of popular deep learning (DL) models.

DL model	Acronym	Variants	Acronym
Convolutional neural network [34]	CNN	Visual geometry group [35]	VGG (VGG‐16, VGG‐19)
		AlexNet [36]	N/A
		Xception [37]	N/A
		GoogLeNet [38]	N/A
		GoogLeNet inception V3 [39]	Inception V3
		GoogLeNet inception V4 [40]	Inception V4
		Residual networks [41]	ResNet
		ResNeXt [42]	N/A
		ResNet (Split attention networks) [43]	ResNeSt
		U‐Net [44]	N/A
		Graph convolutional network [45]	GCN
		Dense convolutional network [46]	DenseNet
		EfficientNet [47]	N/A
		MobileNet [48, 49, 50]	N/A
		ShufflieNet [51]	N/A
		SqueezeNet [52]	N/A
Recurrent neural network	RNN	Long short‐term memory [53]	LSTM
		Bidirectional LSTM [54]	BiLSTM
		Gated recurrent unit [55]	GRU