نتایج جستجو برای: singular di erential operator

تعداد نتایج: 399959  

1996
Eero P. Simoncelli

We describe a novel formulation of the range recovery problem, based on computation of the di erential variation in image intensities with respect to changes in camera position. The method uses a single stationary camera and a pair of calibrated optical masks to directly measure this di erential quantity. The subsequent computation of the range image is simple and should be suitable for real-ti...

Journal: :IACR Cryptology ePrint Archive 2016
Patrick Derbez

While impossible di erential cryptanalysis is a well-known and popular cryptanalytic method, errors in the analysis are often discovered and many papers in the literature present aws. Wishing to solve that, Boura et al. [1] presented at ASIACRYPT'14 a generic vision of impossible di erential attacks with the aim of simplifying and helping the construction and veri cation of this type of cryptan...

1998
Kaisa Sere

Re nement Calculus is a formal framework for the development of provably correct software It is also used in the development of Action Systems which is a predicate transformer based framework for constructing distributed and reactive software systems Recently Action Systems were extended with a new action called the di erential action It allows the modelling of con tinuous behaviour Along with ...

Journal: :IEEE Trans. Communications 1999
Robert Schober Wolfgang H. Gerstacker Johannes B. Huber

A new technique is proposed to improve the performance of di erential detection of MDPSK (M{ary di erential phase{shift keying) signi cantly, applying sequence estimation. In order to obtain an appropriate representation of the received signal, a nonlinear time{variant FIR or IIR prediction{error lter is used. For both lter structures the optimum coe cients are derived, assuming transmission ov...

1997
I. E. Lagaris A. Likas D. I. Fotiadis

We present a method to solve initial and boundary value problems using arti ial neural networks. A trial solution of the di erential equation is written as a sum of two parts. The rst part satis es the initial/boundary onditions and ontains no adjustable parameters. The se ond part is onstru ted so as not to a e t the initial/boundary onditions. This part involves a feedforward neural network, ...

1989
Moody T Chu

The problem of simultaneous reduction of real matrices by either orthogo nal similarity or orthogonal equivalence transformations is considered Based on the Jacobi idea of minimizing the sum of squares of the complementary part of the desired form to which matrices are reduced the projected gradi ent method is used in this paper It is shown that the projected gradient of the objective function ...

Journal: :international journal of mathematical modelling and computations 0
s. el ouadih department of mathematics, faculty of sciences a¨ın chock,university hassan ii, casablanca, morocco; r. daher department of mathematics, faculty of sciences a¨ın chock,university hassan ii, casablanca, morocco m. el hamma department of mathematics, faculty of sciences a¨ın chock,university hassan ii, casablanca, morocco.

in this paper, using a generalized translation operator, we prove theestimates for the generalized fourier-bessel transform in the space l2 on certainclasses of functions.

Journal: :Computers & Mathematics with Applications 2014
Benny Y. C. Hon Robert Schaback M. Zhong

1. Introdu tion. There are plenty of appli ation papers in whi h kernels or radial basis fun tions are su essfully used for solving partial di erential equations by meshless methods. The usage of kernels is typi ally based on spatial interpolation at s attered lo ations, writing the trial fun tions entirely in terms of nodes [2℄. For stationary partial di erential equations, the dis retization ...

1994
Jiongmin Yong

The problem of nding adapted solutions to systems of coupled linear forward-backward stochastic dierential equations (FBSDEs, for short) is investigated. A necessary condition of solvability leads to a reduction of general linear FBSDEs to a special one. By some ideas from controllability in control theory, using some functional analysis, we obtain a necessary and sucient condition for the solv...

1997
Michael F. Singer

This paper surveys recent work on the problems of calculating Galois groups of diierentialequations and of constructingdiierentialequations with given groups as their Galois groups.

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