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The detection of CH4 gas is very important for the prediction of fire in mine. In this paper a technology of CH4 sensor on the disturb mode of optic fiber is introduced. It is showed that CH4 can be detected by the flow of light energy in optic fiber, which is caused by the disturbing technology. The experiments showed that the sensibility and the selectivity for the detection of CH4 are researched...
This paper presents a new nonlinear method to analyse ventricular arrhythmia (ventricular flutter (VFL), ventricular fibrillation(VF) and ventricular tachycardia(VT)) mixed in sinus rhythms(SR) from the raw electrocardiogram (ECG) data. The method has a three step processing. First, calculating the slope of permutation entropy (PE) to detect the onset of ventricular arrhythmia; Second, using regularization...
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