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- W2012026064 abstract "Statistical mechanics techniques have proved to be useful tools in quantifying the accuracy with which signal vectors are extracted from experimental data. However, analysis has previously been limited to specific model forms for the population covariance C, which may be inappropriate for real world data sets. In this paper we obtain new statistical mechanical results for a general population covariance matrix C. For data sets consisting of p sample points in we use the replica method to study the accuracy of orthogonal signal vectors estimated from the sample data. In the asymptotic limit of at fixed α = p/N, we derive analytical results for the signal direction learning curves. In the asymptotic limit the learning curves follow a single universal form, each displaying a retarded learning transition. An explicit formula for the location of the retarded learning transition is obtained and we find marked variation in the location of the retarded learning transition dependent on the distribution of population covariance eigenvalues. The results of the replica analysis are confirmed against simulation." @default.
- W2012026064 created "2016-06-24" @default.
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- W2012026064 date "2010-04-08" @default.
- W2012026064 modified "2023-09-25" @default.
- W2012026064 title "Statistical mechanics of learning orthogonal signals for general covariance models" @default.
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- W2012026064 doi "https://doi.org/10.1088/1742-5468/2010/04/p04009" @default.
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