نتایج جستجو برای: mother wavelet

تعداد نتایج: 83262  

2014
Ibon Oleagordia-Ruiz Begonya García-Zapirain

This research work presents an oesophageal speech improvement algorithm using Wavelet and Kalman Filtering approach. In both techniques, it has been used different mother wavelet for wavelet approach and different measurement noises for Kalman filtering. People who have suffered from larynx cancer have enormously low intelligibility due to the surgery. A new algorithm has been developed to impr...

2011
A. Phinyomark C. Limsakul P. Phukpattaranont

Nowadays, analysis of electromyography (EMG) signal using wavelet transform is one of the most powerful signal processing tools. It is widely used in the EMG recognition system. In this study, we have investigated usefulness of extraction of the EMG features from multiple-level wavelet decomposition of the EMG signal. Different levels of various mother wavelets were used to obtain the useful re...

Journal: :International Journal of Electrical and Computer Engineering (IJECE) 2016

2017
Duo Chen Suiren Wan Jing Xiang Forrest Sheng Bao

In the past decade, Discrete Wavelet Transform (DWT), a powerful time-frequency tool, has been widely used in computer-aided signal analysis of epileptic electroencephalography (EEG), such as the detection of seizures. One of the important hurdles in the applications of DWT is the settings of DWT, which are chosen empirically or arbitrarily in previous works. The objective of this study aimed t...

Journal: :Journal of Marine Science and Engineering 2022

Air quality can be affected by merchant ships, so it is important to regulate emissions that are produced, as well use energy efficiently. In this sense, the cleanliness of oil used in lubrication essential achieve a better and reduce losses marine engines. For that, vital carry out good maintenance strategies. Therefore, develop techniques allow condition monitoring during engine operation. or...

2013
Kohei Arai Tomoko Nishikawa

Abstract—Multi-Resolution Analysis: MRA based on the mother wavelet function with which support length differs from the image of the automobile rear under run is performed, and the run characteristic of a car is searched for. Speed, deflection, etc. are analyzed and the method of detecting vehicles with high accident danger is proposed. The experimental results show that vehicles in a dangerous...

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 2009
Michael Unser Daniel Sage Dimitri Van De Ville

The monogenic signal is the natural 2-D counterpart of the 1-D analytic signal. We propose to transpose the concept to the wavelet domain by considering a complexified version of the Riesz transform which has the remarkable property of mapping a real-valued (primary) wavelet basis of L(2) (R(2)) into a complex one. The Riesz operator is also steerable in the sense that it give access to the Hil...

1997
F. K. Lam C. K. Leung

algorithms, the geometrical properties such as size, shape, and orientation, of objects can also be investigated by ultrasonic imaging methods. An inherent problem with ultrasonic detection is the conflict between signal-to-noise ratio and resolution. If good resolution is to be obtained, the transmitted pulse cannot be long in duration. If short ultrasonic pulses are used, their energy is smal...

2007
David L. Donoho Larry L. Schumaker

We describe bases of smooth wavelets where the coeecients are obtained by integration against ((nite combinations of) boxcar kernels rather than against traditional smooth wavelets. Bases of this type were rst developed in work of Tchamitchian and of Cohen, Daubechies, and Feauveau. Our approach emphasizes the idea of average-interpolation { synthesizing a smooth function on the line having pre...

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