Mathematical Problems in Engineering / 2014 / Article / Tab 2

Research Article

Short-Term Coalmine Gas Concentration Prediction Based on Wavelet Transform and Extreme Learning Machine

Table 2

Comparison of different prediction methods.

MethodMAEMAPERMSENRMSETraining time (s)Testing time (s)

CART0.02490.06220.03140.04700.02800.0084
BPNN0.01940.04810.02410.03610.55310.0650
SVM0.01930.04790.02390.0358N/AN/A
ELM0.01890.04680.02370.03540.00630.0054
WELM0.00490.01230.00610.00910.01550.0073