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arXiv 1905.04529math.OCeess.SP
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基于优化最小化的非负矩阵分解新算法

Novel Algorithms based on Majorization Minimization for Nonnegative Matrix Factorization

R. Jyothi, P. Babu, R. Bahl

摘要:

矩阵分解是普遍存在的,并且在诸如语音处理、数据挖掘和图像处理等各种领域中具有应用。在矩阵分解下,非负矩阵分解用于将非负矩阵分解为两个非负矩阵的乘积,这给出了一些有意义的数据解释。因此,非负矩阵分解比其他分解技术更有优势。在本文中,我们提出了两个新的迭代算法的基础上的优化最小化(MM)-在其中,我们制定了一个新的上界,并尽量减少它得到一个封闭的形式的解决方案,在每一次迭代。由于算法是基于MM,它是确保所提出的方法将是单调的。所提出的算法的不同之处在于两个非负矩阵的更新方法。第一种算法-迭代非负矩阵分解(INOM)顺序更新两个非负矩阵,而第二种算法-并行迭代非负矩阵分解(PARINOM)并行更新两个非负矩阵。我们还证明了所提出的算法收敛到问题的平稳点。仿真结果表明,所提算法在计算速度和收敛性方面均优于现有算法。关键词:非负矩阵分解,优化最小化,大数据,并行,乘法更新

英文摘要:

Matrix decomposition is ubiquitous and has applications in various fields like speech processing, data mining and image processing to name a few. Under matrix decomposition, nonnegative matrix factorization is used to decompose a nonnegative matrix into a product of two nonnegative matrices which gives some meaningful interpretation of the data. Thus, nonnegative matrix factorization has an edge over the other decomposition techniques. In this paper, we propose two novel iterative algorithms based on Majorization Minimization (MM)-in which we formulate a novel upper bound and minimize it to get a closed form solution at every iteration. Since the algorithms are based on MM, it is ensured that the proposed methods will be monotonic. The proposed algorithms differ in the updating approach of the two nonnegative matrices. The first algorithm-Iterative Nonnegative Matrix Factorization (INOM) sequentially updates the two nonnegative matrices while the second algorithm-Parallel Iterative Nonnegative Matrix Factorization (PARINOM) parallely updates them. We also prove that the proposed algorithms converge to the stationary point of the problem. Simulations were conducted to compare the proposed methods with the existing ones and was found that the proposed algorithms performs better than the existing ones in terms of computational speed and convergence. KeyWords: Nonnegative matrix factorization, Majorization Minimization, Big Data, Parallel, Multiplicative Update

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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