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Update anchor.md
add 13.3, 13.4, 13.5
【Paddle】add discussion for paddle chap13+chap15 (#1225)
add fcn
Update fine-tuning.md
add ch13.1 ch13.2
[polish] chapter 6,7,13 peer review (#1030)
Update kaggle-cifar10_origin.md
Update kaggle-dog.md (#1200)
add ch13.13 13.14
add neural style transfer
add 13.6--13.8
add semantic segmentation and trans cov