نتایج جستجو برای: wavelet packet transform

تعداد نتایج: 176869  

2005
MINH HUNG LE NIKOS E. MASTORAKIS

Performance analysis of multilevel unequal error protection (UEP) codes with wavelet video compression for wideband multicarrier code division multiple access (MC-CDMA) and Rake receivers over additive white Gaussian noise (AWGN) and Rayleigh fading channels are achieved and evaluated. Wavelets possess a dominant method and high quality for compressing video sequence. A spatially scalable video...

2001
Mingqi Li Qicong Peng Shouming Zhong

On the wavelet-packet modulation scheme, wavelet packets are used as carriers, where information to be transmitted is encoded, via an inverse wavelet packet transform, as the coefficient of wavelet packets. The power spectrum density (PSD) of the modulated signals describes the property of modulation in frequency domain, which is discussed by many researchers by simulation. In this paper, the f...

Journal: :Procedia CIRP 2021

An important aspect of the overall quality machined parts is surface roughness, which depends on cutting parameters, tool condition, and machine vibrations. Online roughness prediction in milling operations can reduce set up time assist determining economic parameters. However, adoption existing solutions industrial production inhibited by lacking integration an open retrofittable architecture....

2000
Brandon Whitcher B. Whitcher

Motivation • Seasonal long memory is gaining attention as a time series model in econometrics and the physical sciences. { Arteche and Robinson (2000) proposed log-periodogram regression and Gaussian semi-parametric estimation for seasonal long-memory processes. • The discrete wavelet transform (DWT) is a useful alternative to the discrete Fourier transform for the analysis and synthesis of lon...

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