Guanghui Ren(任广辉)

Results 6 issues of Guanghui Ren(任广辉)

https://github.com/microsoft/MMdnn/issues/882

Thanks for your great work. The problem is just as the title said.

Thanks for your great code! `self.centered_gradient_kernels = self.get_centered_gradient_kernel().train(False)` When I remove the 'train(False)', I found that the paramters of get_centered_gradient_kernel cannot be trained and it retains unchanged.I guess that maybe...