Results 21 to 30 of about 1,028,789 (292)

On the Compressibility of Operators in Wavelet Coordinates [PDF]

SIAM Journal on Mathematical Analysis, 2004
In [Found. Comput. Math., 2 (2002), pp. 203--245], Cohen, Dahmen, and DeVore proposed an adaptive wavelet algorithm for solving operator equations. Assuming that the operator defines a boundedly invertible mapping between a Hilbert space and its dual, and that a Riesz basis of wavelet type for this Hilbert space is available, the operator equation can ...
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Fractal Image Compression Using Modified Operator (IFS) [PDF]

, 2013
Image data Compression based on fractal theory is fundamentally dierent from conventional compression methods, its idea is to generate a contraction operator whose fixed point approximates the original image in a complete metric space of images.
Al-Jawfi, Rashad A., Ahmed, Adil M., Al-Helali, Baligh, Adil M. Ahmed, Rashad A. Al-Jawfi, Baligh Al-Helali   +5 more
core   +1 more source

Partition of the Spectra for the Generalized Difference Operator B(r,s) on the Sequence Space cs

Cumhuriyet Science Journal, 2018
The goal of this study gives the approximatepoint spectrum, the defect spectrum and the compression spectrum of generalizeddifference operator B (r, s) over the class ofconvergent series.
Mustafa Yıldırım, Nuh Durna, Rabia Kılıç   +2 more
doaj   +1 more source

Adaptively Compressed Exchange Operator [PDF]

Journal of Chemical Theory and Computation, 2016
The Fock exchange operator plays a central role in modern quantum chemistry. The large computational cost associated with the Fock exchange operator hinders Hartree-Fock calculations and Kohn-Sham density functional theory calculations with hybrid exchange-correlation functionals, even for systems consisting of hundreds of atoms.
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Fine Spectra of Upper Triangular Double-Band Matrices over the Sequence Space ,

Discrete Dynamics in Nature and Society, 2012
The operator on sequence space on is defined , where , and and are two convergent sequences of nonzero real numbers satisfying certain conditions, where . The main purpose of this paper is to determine the fine spectrum with respect to the Goldberg's
Ali Karaisa
doaj   +1 more source

Image Forensics Using Non-Reducing Convolutional Neural Network for Consecutive Dual Operators

Applied Sciences, 2022
Digital image forensics has become necessary as an emerging technology. Images can be adulterated effortlessly using image tools. The latest techniques are available to detect whether an image is adulterated by a particular operator. Most of the existing
Se-Hyun Cho, Saurabh Agarwal, Seok-Joo Koh, Ki-Hyun Jung   +3 more
doaj   +1 more source

RESEARCH ON DIFFERENTIAL CODING METHOD FOR SATELLITE REMOTE SENSING DATA COMPRESSION [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Data compression, in the process of Satellite Earth data transmission, is of great concern to improve the efficiency of data transmission. Information amounts inherent to remote sensing images provide a foundation for data compression in terms of ...
Z. J. Lin, N. Yao, B. Deng, C. Z. Wang, J. H. Wang   +4 more
doaj   +1 more source

Low-depth simulations of fermionic systems on square-grid quantum hardware [PDF]

Quantum
We present a general strategy for mapping fermionic systems to quantum hardware with square qubit connectivity which yields low-depth quantum circuits, counted in the number of native two-qubit fSIM gates.
Manuel G. Algaba, P. V. Sriluckshmy, Martin Leib, Fedor Šimkovic IV   +3 more
doaj   +1 more source

An operational approach for hyperspectral image compression [PDF]

2012 IEEE International Geoscience and Remote Sensing Symposium, 2012
In lossy compression such as PCA+JPEG2000 for hyperspectral imagery, the bitrate is usually not fixed, resulting in various rate-distortion performance. In this paper, we propose an operational approach to determine the approximately optimal bitrate to be used to preserve both the majority of the information in the dataset as well as the anomalous ...
Qian Du 0001, Nam Hoai Ly, James E. Fowler   +2 more
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Fine Spectra of Upper Triangular Triple-Band Matrices over the Sequence Space ()

Abstract and Applied Analysis, 2013
The fine spectra of lower triangular triple-band matrices have been examined by several authors (e.g., Akhmedov (2006), Başar (2007), and Furken et al. (2010)). Here we determine the fine spectra of upper triangular triple-band matrices over the sequence
Ali Karaisa, Feyzi Başar
doaj   +1 more source