《Table 2Performance comparison of DPT-ELM, DP-ELM, TELM and BP (500 r/min, without AWD denoise)》

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《Diagnosis of multiple faults using a double parallel two-hidden-layer extreme learning machine》

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The average running time and the accuracy determined with four groups of experiments，are listed in Table 2，Table 3，Table 4 and Table 5.From these results，such as those in Table 3，it is evident that DPT-ELM can achieve a higher accuracy of 96.7%with a few of the hidden layer nodes.Additionally，the learning time is very short，as it can learn hundreds of times faster than BP.A comparison of Table 2 with Table 3，or of Table 4 with Table 5 reveals that the accuracy is obviously improved with AWD denoise.For example，the comparison of Table 2 with Table 3 indicates that the accuracy of DPT-ELM is improved from 92.1%to96.7%.