Upper panel: time that three algorithms take for classification versus the number of RBM components. The vertical axis represents the time that the computer takes for testing, while the horizontal axis represents the number of RBM components used in the experiment. The RBM components are obtained by applying RBM to the spectral data, and it is similar to the PCA components. Lower panel: testing accuracies of the three algorithms versus the number of RBM components. The vertical axis represents the testing accuracies, while the horizontal axis represents the number of RBM components used in experiments. We only present the results of using spectra data with 10 <S/N ≤ 20. We note that the results of using other data sets and using the PCA components are similar to the results present here.
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