Harmonic inversion has already been proven to be a powerful tool for the analysis of quantum spectra and the periodic orbit orbit quantization of chaotic systems. The harmonic inversion technique circumvents the convergence problems of the periodic orbit sum and the uncertainty principle of the usual Fourier analysis, thus yielding results of high resolution and high precision. Based on the clo...

in this article, we have calculated some thermodynamic properties for a system consisting of singy ionized 3he atoms and their corresponding removed electrons by employing the second quantization method at finite temperature. to perform the calculations, we have considered the kinetic term, and coulomb interaction between the particles in our hamiltonian. the calculated properties are free ener...

An integrated circuit has been designed to investigate the quantization of energy levels in an RF SQUID. The experiment is very similar to the rapid-sweep technique of Silvestrini et al., except that it is accomplished by using superconducting digital electronic circuitry as the experimental apparatus. This allows the system being studied to be very well isolated from its environment. ( 2000 El...

It is advantageous in terms computational efficiency to carry out image indexing and retrieval based on compressed data. We describe an image indexing and retrieval scheme based on vector quantization (VQ). Experimental results show that the proposed scheme has higher retrieval performance than the basic colour histogram based method.

A novel image compression algorithm based on vector quantization (VQ) technique is proposed in this paper. Adaptive resolution VQ (AR-VQ) method, which is composed of three key techniques, i.e., the edge detection, the resolution conversion, and the block alteration, can realize much superior compression performance than the JPEG and the JPEG-2000. On the compression of the XGA (1024x768 pixels...

The quantization index modulation (QIM) that is often used in watermarking can provide a tradeoff between robustness and transparency. In this paper, we propose a robust audio watermarking technique which adopts the wavelet QIM method with adaptive step sizes for blind watermark extraction. Since wavelet transform offers both temporal and frequency resolutions, it is suitable for audio signal p...

Image processing is a technique to perform operations on an image, with a specific goal to get an enhanced image or to extract some helpful information from it. It is a kind of signal processing in which input is an image and output might be image or characteristics/features associated with that image. These days, image processing is among quickly growing technologies. It forms core research ar...

A tremendous amount of digital multimedia data is broadcasted daily over internet. Digital data being very quickly and easily duplicable, intellectual property rights protection techniques, appeared about fifty years ago (see (14) for an extended review). Digital watermarking was born. Since its birth, many watermarking techniques appeared, in all possible transformed spaces. However, an import...