Update requirements.txt

rename notebook

add generate preprocess v3 notebook and correct preprocess notebook

add new notebooks

evaluatied notebook support many weights as once

fixed split_rate cannot be set

Add evaluation by threshold notebook

modify data augmentation

Modify training data augmentation

Add some comments

Distinguish the data augmentation of training data and valid data

reformat code in model.py

Change model from function to class

Update README.md

Update README.md