Applications of Fractional Lower Order Synchrosqueezing Transform Time Frequency Technology to Machine Fault Diagnosis

Figure 7

Time frequency representations of the signal under noise environment ( and , ). (a) STFT time frequency representation of the signal ; (b) FLOSTFT time frequency representation of the signal ; (c) FSST time frequency representation of the signal ; (d) FLOFSST time frequency representation of the signal .

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