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An approach to expand Hownet in restricted domain of traditional China medicine (TCM) is proposed. On the basis of expansion module of TCM domain Hownet and tag method of TCM domain concept, database TCM domain Hownet is constructed and calculation of the domain concept similarity is given. The experiment result indicates that Hownet expansion model obtains good results in computing similarity of...
For the rolling bearing diagnosis, how to identify the fault feature effectively is the key issue. Due to the resonance modulation characteristic induced by shock fault of the rolling bearings, the wavelet transform technology can extract the modulation information effectively. On the other hand, as there are no fixed kernel functions in wavelet analysis, the transform results are closely related...
Based on wavelet analysis method and Hilbert envelop demodulation, a method for the fault diagnosis of rolling bearings is proposed in this paper. The local Hilbert demodulation and local wavelet transform are introduced respectively. The wavelet transform is used to translate vibration signals into time-scale representation. Then, an envelope signal can be obtained by envelop spectrum analysis of...
Gearbox vibration signal of high-speed wire rolling mills is complex and has much complex frequency structure and various disturb. It leads to the difficulty of diagnosis work especially some or other early impulse fault hidden in existence. The paper presents a new comprehensive analysis method which integrates the statistical analysis, the frequency analysis and the time-frequency analysis organically...
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