条件随机场-CRF (3)

[1] https://blog.csdn.net/heavenpeien/article/details/79890993
[2] https://www.cnblogs.com/damumu/p/7320484.html
[3] https://blog.csdn.net/u012759136/article/details/52434826
[4] https://blog.csdn.net/wu_wenhuan/article/details/53140973
[5] https://blog.csdn.net/sunyao_123/article/details/79508547
[6] https://blog.csdn.net/lonelyrains/article/details/51582003
[7] https://www.sohu.com/a/164255971_465975
[8] https://yq.aliyun.com/articles/67189
[9] https://blog.csdn.net/haoji007/article/details/80352997