The following publications are possibly variants of this publication:
- Direct Density-Ratio Estimation with Dimensionality Reduction via Hetero-Distributional Subspace AnalysisMakoto Yamada, Masashi Sugiyama. AAAI 2011: 549-554 [doi]
- Direct Density Ratio Estimation with Dimensionality ReductionMasashi Sugiyama, Satoshi Hara, Paul von Bünau, Taiji Suzuki, Takafumi Kanamori, Motoaki Kawanabe. sdm 2010: 595-606 [doi]
- Conditional Density Estimation via Least-Squares Density Ratio EstimationMasashi Sugiyama, Ichiro Takeuchi, Taiji Suzuki, Takafumi Kanamori, Hirotaka Hachiya, Daisuke Okanohara. jmlr, 9:781-788, 2010. [doi]
- Sufficient Dimension Reduction via Direct Estimation of the Gradients of Logarithmic Conditional DensitiesHiroaki Sasaki, Voot Tangkaratt, Gang Niu, Masashi Sugiyama. neco, 30(2), 2018. [doi]
- Sufficient Dimension Reduction via Direct Estimation of the Gradients of Logarithmic Conditional DensitiesHiroaki Sasaki, Voot Tangkaratt, Masashi Sugiyama. acml 2015: 33-48 [doi]