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- W2271126220 abstract "It is critical to reduce the abnormal and complex jamming signals in the first order IMF component, because the decomposition result of the first order intrinsic mode function (IMF) in the empirical mode decomposition (EMD) method directly affects the subsequent decomposition effect, and also there are sampling restrictions for ultrasonic detectors. In this paper, we use a threestep optimization method to obtain the first order IMF. The first step is that the local extreme points of collected echo signals are fitted as the upper and lower envelopes by using the cubic spline interpolation method. The second step is to look for the curve of local mean of the echo signals on the basis of the upper and lower envelopes. The third step decomposes the curve of local mean by the EMD method. The simulation results show that our proposed method can effectively reduce jamming signals in the first order IMF and achieve the aim of improving the decomposition effect of the EMD method." @default.
- W2271126220 created "2016-06-24" @default.
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- W2271126220 date "2015-01-01" @default.
- W2271126220 modified "2023-09-23" @default.
- W2271126220 title "The Improved Algorithm of the EMD Decomposition Based on Cubic Spline Interpolation" @default.
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- W2271126220 doi "https://doi.org/10.14355/spr.2015.04.011" @default.
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