迁移学习(Transfer learning)
2017-04-17 14:28
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迁移学习(Transfer learning)
1 Introduction
Example:Dog/Cat Classifier现实生活中一直存在迁移学习
2 Classification
label & label:{(xs,ys),(xt,yt)}Fine tuning:复制前面几层layer的实验效果,复制越多越差
multitask learning:共用前面几层layer;共用中间的layer;
不同语种之间的迁移
Progressive NN:迁移其他任务训练得到的神经网络
label & unlabel:{(xs,ys),(xt)}
4000
Domian-adversarial training:
feature exteactor → Domian classifier → domain label 骗过
feature exteactor → label predictor 保证
《Unsupervised Domain Adaptation by Backpropagation》——ICML2015
《Domain-Adversarial Training of Neural Networks》——JMLR2016
![](http://ww3.sinaimg.cn/mw690/5396ee05jw1f9r6zi3n59j21e20zi1fi.jpg)
Zero-shot learning:不同的任务,例如source data是猫和狗,test data是草泥马
只预测得到接近的类,接近的特征
attribute embedding:利用神经网络等模型映射到映射空间中,越接近的点越像
f∗,g∗=argminf,g∑nmax(0,k−f(xn)g(yn)+maxm≠nf(xn)g(ym)),k由自己定义
unlabel & label:self-taught learning
unlabel & unlabel:self-taught clustering
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