機器學習_公開數據集
http://archive.ics.uci.edu/ml/datasets.html
https://aws.amazon.com/cn/public-datasets/
https://www.kaggle.com/competitions
http://www.kdnuggets.com/datasets/index.html
http://www.sogou.com/labs/resource/list_pingce.php
https://tianchi.aliyun.com/datalab/index.htm
http://www.pkbigdata.com/common/cmptIndex.html