Results 251 to 260 of about 2,595,527 (292)

ASYMPTOTIC EXPANSION FOR DIFFERENCE EQUATIONS WITH INFINITE DELAY

Asian-European Journal of Mathematics, 2009
Using summable dichotomies and Schauder's fixed point theorem, we obtain existence, asymptotic behavior and compactness properties, of convergent solutions for difference equations with infinite delay. Applications on Volterra difference equations with infinite delay are shown.
Cuevas, Claudio, del Campo, Luis
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Difference Expansion-Based Data Hiding Method by Changing Expansion Media

2016
In this era, protecting secret data has played an important role since such data may be transmitted over public networks or stored in public storages. One possible method to protect the data is by implementing steganography/data hiding algorithms, such as Difference Expansion (DE).
Tohari Ahmad, Diksy M. Firmansyah, Dwi S. Angreni   +2 more
openaire   +1 more source

Reversible and Blind Database Watermarking Using Difference Expansion

International Journal of Digital Crime and Forensics, 2008
There has been significant research in the field of database watermarking recently. However, there has not been sufficient attention given to the requirement of providing reversibility (the ability to revert back to original relation from watermarked relation) and blindness (not needing the original relation for detection purpose) at the same time ...
Gupta, Gaurav, Pieprzyk, Josef
openaire   +3 more sources

Holonomic Difference Equations and Asymptotic Expansion

2011
As we have seen in Chapter 1, the Γ-function is a solution of a first-order difference equation which can be uniquely determined by its asymptotic behavior at infinity. This fact can be generalized to the cases of several variables that contain a finite number of unknown meromorphic functions which satisfy a holonomic system of difference equations ...
Kazuhiko Aomoto, Michitake Kita
openaire   +1 more source

Reversible Data Embedding Using Reduced Difference Expansion

Third International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP 2007), 2007
The general difference expansion method uses reversible integer transform to embed information into a digital image and perfectly restores the original image after removing the hidden data. In multilayer embedding applications, the operation of difference expansion may seriously degrade the visual quality of the embedded image.
Chiang-Lung Liu, Der-Chyuan Lou, Chien-Chung Lee   +2 more
openaire   +1 more source

EPS Expansion Under Different Market Models

2010
This chapter gives consideration to the issues and problems related to EPS development. Special attention is focused on the expansion of generation capacities and intersystem electric ties (ISETs), and on wholesale electricity markets in which power plants and ISETs participate.
openaire   +1 more source

Data Hiding Using Multi-Pixel Difference Expansion

2018 3rd International Conference on Computer and Communication Systems (ICCCS), 2018
This paper proposed a reversible multiple layer data hiding to improve the method proposed by Arham et al. Using the relevance of pixels to modify the block size and change the scan mode can enhance image embedded capacity so that the maximum embedding amount of the original block was increased from 3 bits to 8 bits.
Chin-Feng Lee, Jau Ji Shen, Yu Hua Lai
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MMS1201 (AC-DC Difference) Expansion.

Proposed for presentation at the PSL R&D Summit held September 29-29, 2021 in Albuquerque, NM., 2021
Aaron Meyrick, Joshua Stanford, Raegan Johnson, Edward O'Brien   +3 more
openaire   +1 more source

Scaling Zernike expansion coefficients to different pupil sizes

Journal of the Optical Society of America A, 2002
Recent developments in technologies to correct aberrations in the eye have fostered extensive research in wave-front sensing of the eye, resulting in many reports of Zernike expansions of wave-front errors of the eye. For different reports of Zernike expansions, to be compared, the same pupil diameter is required.
openaire   +2 more sources

Consecutive Difference Expansion Based Reversible DNA Watermarking

Journal of the Institute of Electronics and Information Engineers, 2015
Of recent interests on high capacity DNA storage, DNA watermarking for DNA copyright protection, and DNA steganography for DNA secret communication are augmented, the reversible DNA watermarking is much needed both to embed the watermark without changing the functionality of organism and to perfectly recover the host DNA sequence.
Suk-Hwan Lee, Ki-Ryong Kwon
openaire   +1 more source