提出一个新的评价度量:最大局部加权均值差异(Maximum Local Weighted Mean Discrepancy
MLMD)
该度量反映源域和目标域分布差异时能充分考虑两个区域内在的局部结构
同时还能通过局部分布差异去反映全局分布差异.本文还在此度量的基础上提出一种能实现迁移学习任务并具有一定局部学习能力的特征提取方法:最大局部加权均值差异嵌入(Maximum Local Weighted Mean Discrepancy Embedding
MWME).该方法不但能完成传统意义上的特征提取
同时还能完成在两个分布存在差异但相关的两个区域上实现领域适应学习
从而表明该特征提取方法具有较好的鲁棒性和适应性.实验证明MLMD准则和MWME方法具有上述优势.
Abstract
MMDE
regarded as a MMD-based feature extraction method
has been successfully used.However
when the feature extraction problems of the original input space have been solved
the MMDE lacks the suitability to some extent.Therefore
we propose Maximum Local Weighted Mean Discrepancy(MLMD)by integrating the theory and technique of local learning methods.The measurement considers fully the internal local structure between domains;at the same time
the global distribution discrepancy can be reflected by the local distribution discrepancy.We also
based on the above measurement
propose Maximum Local Weighted Mean Discrepancy Embedding(MWME)
which not only fulfills transfer learning task but also has certain local learning capability.The MWME can complete traditional feature extraction as well as domain adaptation learning in two domains whose distributions are different but relative
thus indicating its better robustness and adaptation.Tests show the above-proposed advantages of the MLMD criterion and the MWME method.