文本的综合处理

https://gist.github.com/AloneRoad/1605037

https://github.com/fxsjy/jieba/tree/master/extra_dict

https://github.com/hightman/xunsearch/

http://www.open-open.com/lib/view/open1386656752830.html

https://github.com/awnuxkjy/recommend-system

http://blog.youkuaiyun.com/endless_yy/article/details/12745405

http://so.youkuaiyun.com/search?page=2&q=tf-idf

http://blog.youkuaiyun.com/endless_yy/article/details/12745405

http://www.360doc.com/content/11/0810/15/3877783_139391684.shtml

http://www.360doc.com/content/10/0801/21/865714_43012222.shtml

http://www.360doc.com/relevant/139391684_more.shtml

http://www.iteye.com/topic/989012

https://www.google.com.hk/search?q=%E4%B8%AD%E7%A7%91%E9%99%A2%E4%B8%AD%E6%96%87%E5%88%86%E8%AF%8D%2Btf-idf&newwindow=1&espv=210&es_sm=93&ei=jGsMU5SaDMe3iQeNi4GICg&start=10&sa=N&biw=1366&bih=597