An accurate time-frequency representation (TFR) can provide useful information in non stationary data analysis and processing. The traditional methods like short-time Fourier transform (STFT) and wavelet transform (WT) based TFR approaches are leads to a tradeoff between time and frequency resolution. A recently proposed synchrosqueezing transform (SST), which is an extension of the WT, has bee...

The Advanced Along-Track Scanning Radiometer (AATSR) onboard ESA’s Envisat Satellite, is the third in a series of precision radiometers designed to measure Sea Surface Temperature (SST). Since March 2004, an operational Land Surface Temperature (LST) product has also been available, which is the first of its kind since the (A)ATSR mission began in 1991. This product utilises a nadir-only split-...

Abstract In this paper, we study the nonuniform fast Fourier transform with nonequispaced spatial and frequency data (NNFFT) sinc as its application. The computation of NNFFT is mainly based on nodes equispaced frequencies (NFFT). employs two compactly supported, continuous window functions. For fixed nonharmonic bandwidth, show that error $$\sinh$$ <mml:math xmlns:mml="http://www.w3.org/1998/M...

The estimation of the extreme of non-Gaussian load effects for design applications has often been treated tacitly by invoking a conventional peak factor based on Gaussian processes. This assumption breaks down when the loading process exhibits strong nonGaussianity, where a conventional peak factor yields relatively nonconservative estimates due to failure to include long tail regions inherent ...

This study aimed to investigate the anti-angiogenic activity of Vitex agnus castus methanol extract in vivo. Eggs were incubated for three days, small whole made on the fine pinpoint, next day the egg’s sac penetrated and a small frame was made in the shell. The window was resealed and eggs were returned to the incubator until day 10 of chick embryo development, 20 µl of 500mg/ml of the methano...

The improvement in the temporal resolution of seismic data is a critical issue in hydrocarbon exploration. It is important for obtaining more detailed structural and stratigraphic information. Many methods have been introduced to improve the vertical resolution of reflection seismic data. Each method has advantages and disadvantages which are due to the assumptions and theories governing their ...

We all know for a fact that various denoising algorithms have already been proposed. However, there is a keen interest of researchers to develop more effective techniques for image denoising. The proposed mechanisms have not been able to attain the desirable results. It is inevitable to stop the noise introduction while acquisition or transmission of the image. The majorly found noise in images...

The fractional Fourier transformation is used to transform the rectangular Gabor lattice into a quin-cunx lattice. By using the isometric property of the unitary fractional Fourier transformation, the biorthog-onality relation for the rectangular lattice is transformed into a relation which holds for the quincunx lattice. Since a Gaussian function, which plays an important role as a window func...