About the model "Sharma(2DCNN)"

[g185211]

Hi, I'm very thanks for your great work. Here, I have a question about the model "sharma" to ask for your help.

I can't understand the input "x" of the network,
why "'" x = torch.zeros( (1, 1, self.input_channels, self.patch_size, self.patch_size))"'"?
what is """b, t, c, w, h = x.size()"""?

I am looking for your apply, thanks!