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arXiv 2602.05936cs.LG
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数据分析中的黎曼流形降维

Dimensionality Reduction on Riemannian Manifolds in Data Analysis

Université du Littoral Cote d’Opale(杜瓦利尔海岸大学)

Alaa El Ichi, Khalide Jbilou

AI总结:

本文提出基于黎曼几何的降维方法,通过扩展PCA和判别分析,提升流形数据的表示质量和分类性能。

摘要:

本文研究基于黎曼几何的降维方法,以尊重数据的内在流形结构。特别是,我们关注主测地分析(PGA)作为非线性广义PCA用于流形值数据的扩展,并通过黎曼适应其他已知的降维方法进行判别分析的扩展。这些方法利用测地距离、切空间表示和内在统计度量来实现更忠实的低维嵌入。我们还讨论了相关的流形学习技术,并强调其理论基础和实际优势。在具有代表性的数据集上的实验结果表明,黎曼方法在数据受限于曲面如超球面和对称正定流形时,相比欧几里得方法提供了改进的表示质量和分类性能。本研究强调了在现代机器学习和数据科学应用中,几何感知降维的重要性。

英文摘要:

In this work, we investigate Riemannian geometry based dimensionality reduction methods that respect the underlying manifold structure of the data. In particular, we focus on Principal Geodesic Analysis (PGA) as a nonlinear generalization of PCA for manifold valued data, and extend discriminant analysis through Riemannian adaptations of other known dimensionality reduction methods. These approaches exploit geodesic distances, tangent space representations, and intrinsic statistical measures to achieve more faithful low dimensional embeddings. We also discuss related manifold learning techniques and highlight their theoretical foundations and practical advantages. Experimental results on representative datasets demonstrate that Riemannian methods provide improved representation quality and classification performance compared to their Euclidean counterparts, especially for data constrained to curved spaces such as hyperspheres and symmetric positive definite manifolds. This study underscores the importance of geometry aware dimensionality reduction in modern machine learning and data science applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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