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arXiv physics/0601161physics.chem-phcond-mat.stat-mechcs.ITmath.ITmath.PRmath.STphysics.comp-phphysics.data-anstat.TH
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最小相关非负混合分解的Monte Carlo算法

Monte Carlo Algorithm for Least Dependent Non-Negative Mixture Decomposition

Sergey A. Astakhov, Harald Stögbauer, Alexander Kraskov, Peter Grassberger

摘要:

我们提出了一种模拟退火算法(称为SNICA的“随机非负独立分量分析”)的非负系数的非负源的线性混合物的盲分解。的去混合是基于大都市型蒙特卡洛搜索最少的依赖组件,与恢复组件之间的互信息作为成本函数和它们的非负性作为硬约束。基本移动是二维子空间中的剪切和三维子空间中的旋转。该算法适合于分解概率密度峰值为零的信号,这是分析光谱和多元曲线分辨率中的典型情况。该方法在大样本混合物和实验数据上的分解性能优于传统的基于主成分分析(MILCA,FastICA,RADICAL)和化学计量学技术(SIMPLISMA,ALS,BTEM)的盲源分离方法。SNICA,MILCA和MI估计器的源代码可以在http://www.fz-juelich.de/nic/cs/software上免费获得

英文摘要:

We propose a simulated annealing algorithm (called SNICA for "stochastic non-negative independent component analysis") for blind decomposition of linear mixtures of non-negative sources with non-negative coefficients. The de-mixing is based on a Metropolis type Monte Carlo search for least dependent components, with the mutual information between recovered components as a cost function and their non-negativity as a hard constraint. Elementary moves are shears in two-dimensional subspaces and rotations in three-dimensional subspaces. The algorithm is geared at decomposing signals whose probability densities peak at zero, the case typical in analytical spectroscopy and multivariate curve resolution. The decomposition performance on large samples of synthetic mixtures and experimental data is much better than that of traditional blind source separation methods based on principal component analysis (MILCA, FastICA, RADICAL) and chemometrics techniques (SIMPLISMA, ALS, BTEM) The source codes of SNICA, MILCA and the MI estimator are freely available online at http://www.fz-juelich.de/nic/cs/software

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