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Two regularized energy-preserving finite difference methods for the logarithmic Klein-Gordon equation

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 393 ()

We present and analyze two regularized finite difference methods which preserve energy of the logarithmic Klein-Gordon equation (LogKGE). In order to ......

Collocation methods for cordial Volterra integro-differential equations

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 393 ()

This paper is concerned with collocation methods for cordial Volterra integro-differential equations (CVIDEs) with noncompact cordial operators. The e......

A support-denoiser-driven framework for single image restoration

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 393 ()

Model-based methods have been the powerful strategies for solving a variety of imaging inverse problems. Particularly, the sparsity-enforcing regulari......

On a weighted time-fractional asymptotical regularization method

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 394 ()

In this paper we study a weighted time-fractional asymptotical regularization method for solving linear ill-posed problems Ax = y where only noisy dat......

Analysis of an adaptive short-time Fourier transform-based multicomponent signal separation method derived from linear chirp local approximation

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 396 ()

Recently, a direct method of the time-frequency approach, called the signal separation operator (SSO), which is based on sinusoidal signal approximati......

Viscosity explicit analysis for finite element methods of time-dependent Navier-Stokes equations

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 392 ()

In this paper, the viscosity explicit stability and error estimate for the finite element method of the time-dependent Navier-Stokes equations are ded......

Characterizations and perturbation analysis of a class of matrices related to core-EP inverses

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 393 ()

Let A, B is an element of C-nxn with ind(A) = k and ind(B) = s and let L-B = (BB)-B-2(sic). A new condition (C-s,C-*): R(A(k)) boolean AND N((B-s)*) =......

A new parameter-free method for Toeplitz systems of weakly nonlinear equations

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 393 ()

Based on the fact that the linear term is strongly dominant over the nonlinear term, by using the approximate inverse-free preconditioned conjugate gr......

An extended Newton-type algorithm for l(2)-regularized sparse logistic regression and its efficiency for classifying large-scale datasets

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 397 ()

Sparse logistic regression, as an effective tool of classification, has been developed tremendously in recent two decades, from its origination the l(......

On relaxed filtered Krylov subspace method for non-symmetric eigenvalue problems

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 398 ()

In this paper, by introducing a class of relaxed filtered Krylov subspaces, we propose the relaxed filtered Krylov subspace method for computing the e......

Generalized Prager-Synge identity and robust equilibrated error estimators for discontinuous elements

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 398 ()

The well-known Prager-Synge identity is valid in H1(S2) and serves as a foundation for developing equilibrated a posteriori error estimators for conti......

Highly accurate, linear, and unconditionally energy stable large time-stepping schemes for the Functionalized Cahn-Hilliard gradient flow equation

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 392 ()

This paper aims to develop a class of large time-stepping schemes for solving the Functionalized Cahn-Hilliard (FCH) gradient flow equation. By using ......

A dual based semismooth Newton-type algorithm for solving large-scale sparse Tikhonov regularization problems

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 397 ()

The regularized least-square problems have drawn a great deal of interest from the statistics and machine learning fields. In this paper, we develop a......

Analytical valuation of vulnerable European and Asian options in intensity-based models

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 393 ()

In this paper, we investigate European and Asian options with default risk in an intensity-based model. By breaking down the risk into idiosyncratic a......

A variable time-stepping algorithm for the unsteady Stokes/Darcy model

期刊: JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021; 394 ()

This report considers a variable time-stepping algorithm proposed by Dahlquist, Liniger and Nevanlinna and discusses its application to the unsteady S......

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