Unoffical implement DDPNOpt

Classify task

• To train with Adam/RMSprop, use _mnist.py.
• To train with DDPNOpt, use _mnist_ddp.py.

Denoise task

• Download full data at GGDrive.
• To train with Adam/RMSprop, use _denoise.py.
• To train with DDPNOpt, use _denoise_ddp.py.

Test

• Download model at saved.
• Use file _infer_ddp.py.