1选题
Domain adpation
http://mp.weixin.qq.com/s?__biz=MzIxNDgzNDg3NQ==&mid=2247483990&idx=1&sn=e4d10d997965e5b75f8d439db57c9537&chksm=97a0c982a0d740941c2e616bea1dfab142661ef48ad232ca668df03dc2a45db5dec631a45f26&scene=21#wechat_redirect
介绍2
https://people.eecs.berkeley.edu/~jhoffman/domainadapt/
