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207  Articles
1 of 22 pages  |  10  records  |  more records»
Due to the weak entropy of the vibration signal in the strong noise environment, it is very difficult to extract compound fault features. EMD (Empirical Mode Decomposition), EEMD (Ensemble Empirical Mode Decomposition) and LMD (Local Mean Decomposition) a... see more

Abstract: The purpose of this study, is to analyze students' commognitive activities during discussion activities in solving skewness and kurtosis questions. The research method used in this research is descriptive qualitative for semester 3 students of S... see more

Tulisan ini membahas tentang perbandingan model ARCH (1) dan GARCH (1,1) dengan melihat perilaku kurtosis dan fungsi autokorelasi baik secara analitik maupun menggunakan simulasi. Metode yang digunakan adalah studi literatur. Hasil yang diperoleh menunjuk... see more

It is shown that the kurtosis and the normalized variance can be used as a measures of the clipping value of speech signals. The use of the proposed measures makes it possible to significantly simplify and speed up the clipping value calculations compare ... see more

The paper aimed at modelling the density of inflation based on time-varying conditional variance, skewness and kurtosis model developed by Leon, Rubio, and Serna (2005) who model higher-order moments as GARCH-type processes by applying a Gram-Charlier ser... see more

This paper deals with the problem of estimation of population mean in two-phase sampling. A ratio-product estimator of population mean using known coefficient of kurtosis of two auxiliary variates has been proposed. In fact, it is a two-phase sampling ver... see more

In this paper, a new approach for fault detection and location of open switch faults in the closed-loop inverter fed vector controlled drives of Electric Multiple Units is proposed. Spectral kurtosis (SK) based on Choi–Williams distribution (CWD) as a sta... see more

Under complicated conditions, the extraction of a multi-fault in gearboxes is difficult to achieve. Due to improper selection of methods, leakage diagnosis or misdiagnosis will usually occur. Ensemble Empirical Mode Decomposition (EEMD) often causes energ... see more

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