text: Title: training question
  Body: Hello! I trained the code 'train_refine.py' without any revise using my own dataset to get the pth file.However,I find the network structure I have got is different from the pretrained model you have provide:pytorch_mobilenetv2.The following image1 is your pretrained model structure and the second one image2 is mine
  ![dbe87887c67e6c02ed1a8263e51e583](https://user-images.githubusercontent.com/55682710/114826419-14b93900-9dfa-11eb-8ee8-acb38f98dc62.png)
  image1
  ![1ba43d7265a1c20d260c80d32b9938c](https://user-images.githubusercontent.com/55682710/114826454-1c78dd80-9dfa-11eb-9347-100a2f4c321f.png)
  image2
  Could you please tell me why the network structure of mine has another 10 layers than yours? and if I want to change the code to get a model like yours,how should I do ?
  
  2.Another question is that I test the model between yours and mine on CPU,I found that your model's flops is twice smaller than mine，which using the same training code.I don’t know if it’s because my network structure has 10 layers more than yours. Like the first question said.
  
  my English is not good,sorry And I hope you can solve my doubts,Thank you!