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IntroductionResearches on fault diagnosis and conditionmonitoring in reciprocating machine are being paidmore and more attentions because of its importancein industrial branches such as power,transporta-tion,shipping,petrochemicals etc. From themechanism viewpoint,diesel engines'working pro-cess is a thermodynamic process to realize the ther-mal- mechanical energy conversion.Low frequencycompression wave and high frequency combustionwave constitute the multifrequency time- varyingproperty of i… 相似文献
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