背包问题九讲

http://love-oriented.com/pack/

“背包问题九讲.” 背包问题九讲, love-oriented.com/pack/. Accessed 5 July 2017.

About Multi-thread

https://www.jiuzhang.com/qa/2232/

“关于多线程？.” 问答 | 九章算法, www.jiuzhang.com/qa/2232/. Accessed 5 July 2017.

Movie score prediction in IMDB 5000 movie dataset

https://www.kaggle.com/yifengzeng/imdb-5000-movie-score-prediction/

https://gist.github.com/YifengZeng/94a902467036e6c00034acf3da219141