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Generalizing Choi map in M3 beyond circulant scenario Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-03-18 Anindita Bera, Giovanni Scala, Gniewomir Sarbicki, Dariusz Chruściński
We introduce a family of positive linear maps in the algebra of 3×3 complex matrices, which generalizes the seminal positive non-decomposable map originally proposed by Choi. Necessary and sufficie...
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Modified CRI iteration methods for complex symmetric indefinite linear systems Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-03-12 Zhao-Zheng Liang, Yan Dou
This work investigates the iterative solution of complex symmetric linear systems with indefinite matrix term. Based on a technical equivalent reformulation of the original indefinite systems, an e...
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On an analogue of a property of singular M-matrices for the Lyapunov and Stein operators Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-03-12 A.M. Encinas, S. Mondal, K.C. Sivakumar
A well-known result for a singular irreducible M-matrix A is that the only nonnegative vector that belongs to the range space of A is the zero vector. In this paper, we prove an analogue of this re...
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Countably many asymptotic tensor ranks Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-03-12 Andreas Blatter, Jan Draisma, Filip Rupniewski
In connection with recent work on gaps in the asymptotic subranks of complex tensors the question arose whether the number of nonnegative real numbers that arise as the asymptotic subrank of some c...
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Balanced reconstruction codes for single edits Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-16
Abstract Motivated by the sequence reconstruction problem initiated by Levenshtein, reconstruction codes were introduced by Cai et al. to combat errors when a fixed number of noisy channels are available. The central problem on this topic is to design codes with sizes as large as possible, such that every codeword can be uniquely reconstructed from any N distinct noisy reads, where N is fixed. In this
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Impossibility of efficient information-theoretic fuzzy extraction Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-14 Benjamin Fuller
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Monomial isomorphism for tensors and applications to code equivalence problems Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-12
Abstract Starting from the problem of d-tensor isomorphism (d- \(\textsf {TI}\) ), we study the relation between various code equivalence problems in different metrics. In particular, we show a reduction from the sum-rank metric ( \(\textsf {CE}_{\textsf {sr}}\) ) to the rank metric ( \(\textsf {CE}_{\textsf {rk}}\) ). To obtain this result, we investigate reductions between tensor problems. We define
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Efficient computation of $$(2^n,2^n)$$ -isogenies Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-12 S. Kunzweiler
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Square root computation in finite fields Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-12 Ebru Adiguzel-Goktas, Enver Ozdemir
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Dynamic response of semi-cylindrical depression, cylindrical cavity and type-III crack to SH wave in half-space anisotropic media Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-13 Debao Guo, Zailin Yang, Jinlai Bian, Yunqiu Song, Yong Yang
In this study, the anti-plane dynamic response of an elastic half-space anisotropic medium containing surface semi-cylindrical depressions and internal cylindrical cavity and type-III crack is solved analytically. The wave function expansion method, the complex function method and the Green's function method can be used to effectively construct the free wave field equation and the scattered wave field
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Rank one quaternionic operators and additive preservers Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-03-11 E. M. Ouahabi, K. Souilah
In this paper, we completely describe all additive surjective maps, on the set of all bounded finite rank right linear operators acting on a right quaternionic Banach space, that preserve the set o...
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Modeling groundwater flow with random hydraulic conductivity using radial basis function partition of unity method Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-12 Fouzia Shile, El Hassan Ben-Ahmed, Mohamed Sadik
Simulating groundwater flows in heterogeneous aquifers is one of the most widely studied problems. The heterogeneity is modeled through random hydraulic conductivity fields log-normally distributed. In this paper, we aim to generate the realization of the log-normal hydraulic conductivity by summing up a finite number of random periodic modes with the Kraichnan algorithm. To address Neumann conditions
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A non-iterative boundary element formulation for nonlinear viscoelasticity Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-12 Ahmet Arda Akay, Ercan Gürses, Serdar Göktepe
In this study, we propose a non-iterative boundary element method (BEM) of highly nonlinear viscoelasticity in time domain. The computationally attractive iteration-free algorithmic structure is achieved by the linearization of a power-type evolution equation. Supplementing the consistent linearization about every solution step with a semi-implicit update scheme, we obtain a robust boundary element
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Some constructions and existence conditions for Hermitian self-dual skew codes Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-10
Abstract In this paper, we first consider the existence conditions, the construction and the enumeration of Hermitian self-dual \(\theta \) -cyclic and \(\theta \) -negacyclic codes over \(\mathrm{I\hspace{-2.10007pt}F}_{p^2}\) , where p is a prime number and \(\theta \) is the Frobenius automorphism over \(\mathrm{I\hspace{-2.10007pt}F}_{p^2}\) . We then give necessary and sufficient conditions for
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MDS codes with l-Galois hulls of arbitrary dimensions Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-09 Liqin Qian, Xiwang Cao, Xia Wu, Wei Lu
The hull of a linear code is defined to be the intersection of the code and its dual, and was originally introduced to classify finite projective planes. The objective of this paper is to construct some MDS codes with l-Galois hulls of arbitrary dimensions by using the generalized Reed–Solomon codes over finite fields with regard to l-Galois inner product. We give a general construction theorem and
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Numerical investigation of high-dimensional option pricing PDEs by utilizing a hybrid radial basis function - finite difference procedure Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-11 Nawzad M. Ahmed, Fazlollah Soleymani, Rostam K. Saeed
The target of this research is to resolve high-dimensional partial differential equations (PDEs) for multi-asset options, modeled as parabolic time-dependent PDEs. We present a hybrid radial basis function - finite difference (RBF-FD) solver, which combines the advantages of Gaussian and multiquadric functions. Additionally, we employ the Krylov subspace method on the resulting system of ordinary differential
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Learning based numerical methods for acoustic frequency-domain simulation with high frequency Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-10 Tingyue Li, Yu Chen, Yun Miao, Dingjiong Ma
Acoustic simulation in frequency-domain is related to solving Helmholtz equations, which is still highly challenging at high frequency with complex geometries. In this paper, a learning based numerical method (LbNM) is proposed for general boundary value problems of Helmholtz equation. By using Tikhonov regularization, the solution operator is stably learned from various data solutions especially fundamental
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Generalized Partial-Slice Monogenic Functions: A Synthesis of Two Function Theories Adv. Appl. Clifford Algebras (IF 1.5) Pub Date : 2024-03-09 Zhenghua Xu, Irene Sabadini
In this paper, we review the notion of generalized partial-slice monogenic functions that was introduced by the authors in Xu and Sabadini (Generalized partial-slice monogenic functions, arXiv:2309.03698, 2023). The class of these functions includes both the theory of monogenic functions and of slice monogenic functions over Clifford algebras and it is obtained via a synthesis operator which combines
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Lie triple centralizers of the algebra of dominant block upper triangular matrices Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-03-04 Prakash Ghimire, Magdalena Benavides, Sheral King, Lavona Young
Let N be the algebra of all n×n dominant block upper triangular matrices over a field. In this paper, we explicitly describe all Lie triple centralizers of N. We also describe Lie triple centralize...
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Analyzing non-isothermal phase transition problems with natural convection using peridynamic differential operator Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-08 Baoliang Zhou, Zhiyuan Li, Yanzhou Lu, Dan Huang
In this study, a developed model for non-isothermal phase transition with natural convection is proposed by using peridynamic differential operator (PDDO). The dimensionless governing equations of heat source approach and vorticity-stream function approach are reconstructed into the non-local integral form. The Euler forward difference is used for time integration. The application of the developed
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A batch-filling method of VIE-MoM matrix for inhomogeneous dielectric target with full- and half-SWG function Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-07 Ruqi Xiao, Wen Geyi, Guo Yang, Wen Wu
A batch-filling method (BFM) for generating the volume-integral-equation-methods of moment (VIE-MoM) matrix for the scattering of inhomogeneous objects by using the full- and half-SWG basis function is proposed. The BFM is based on the summation of contributions of all integrals over tetrahedrons and boundary faces, and the contributions are arranged into a column vector that represents the interactions
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Flow regime classification using various dimensionality reduction methods and AutoML Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-07 Umair Khan, William Pao, Karl Ezra Pilario, Nabihah Sallih
Accurate identification of flow regimes is paramount in several industries, especially in chemical and hydrocarbon sectors. This paper describes a comprehensive data-driven workflow for flow regime identification. The workflow encompasses: i) the collection of dynamic pressure signals using an experimentally verified numerical two-phase flow model for three different flow regimes: stratified, slug
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A novel approach for estimating blood flow dynamics factors of eccentric stenotic arteries based on ML Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-07 Yang Li, Detao Wan, Dean Hu, Changming Li
Reliable and rapid estimation of blood flow dynamics factors in eccentric stenotic arteries could significantly improve clinical treatments. Numerical simulation methods such as FSI and CFD are widely used to investigate blood flow conditions. However, both FSI and CFD are computationally expensive and not suitable for large-scale research. This work proposes an effective approach for estimating the
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Cross element integration for superconvergent frequency computation with cubic isogeometric formulation Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-07 Ao Shen, Zhuangjing Sun, Songyang Hou, Dongdong Wang
A superconvergent cross element integration technique is presented for the cubic isogeometric formulation referring to the frequency computation of wave equations. More specifically, a four-element integration cell with 11-point quadrature and an intermediate two-element integration cell with 6-point quadrature are developed in accordance with the optimization of discrete isogeometric frequency error
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Material point method simulation approach to hydraulic fracturing in porous medium Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-07 Fan Sun, Dongsheng Liu, Guilin Wang, Cong Cao, Song He, Xun Jiang, Siyu Gong
Two primary challenges in simulating hydraulic fracturing are the hydro–mechanical coupling and fracture propagation. The material point method (MPM) has advantages over conventional numerical methods by combining the advantages of particle- and mesh-based approaches in handling highly non-linear hydraulic fracturing problems. However, as MPM is primarily utilized for continuous solid simulations,
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Distance spectral radius and fractional matching in t-connected graphs Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-03-04 Yanling Hu, Huiqiu Lin, Yuke Zhang, Zhiguo Zhang
A fractional matching of a graph G is a function f assigning each edge a number in [0,1] so that ∑e∈Γ(v)f(e)≤1 for each v∈V(G), where Γ(v) is the set of edges incident to v. The fractional matching...
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Probabilistic bounds on best rank-1 approximation ratio Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-03-03 Khazhgali Kozhasov, Josué Tonelli-Cueto
We provide new upper and lower bounds on the minimum possible ratio of the spectral and Frobenius norms of a (partially) symmetric tensor. In the particular case of general tensors, our result reco...
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An SPIM-FEM adapting coupling approach for the analysis of quasi-brittle media Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-06 Samir Silva Saliba, Lapo Gori, Roque Luiz da Silva Pitangueira
This paper presents an adaptive coupling approach between meshless Smoothed Point Interpolation Methods (SPIMs) and the Finite Element Method (FEM) for the physically nonlinear analysis of quasi-brittle media. The nonlinear behaviour is represented by scalar damage and smeared-crack models. In the proposed adaptive coupling approach, the domain is initially discretised with a relatively coarse FEM
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A novel reduced basis method for adjoint sensitivity analysis of dynamic topology optimization Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-06 Shuhao Li, Jichao Yin, Xinchao Jiang, Yaya Zhang, Hu Wang
In gradient-based time-domain topology optimization, Design Sensitivity Analysis (DSA) of the dynamic response is essential, and requires high computational cost to directly differentiate, especially for high-order dynamic system. To address this issue, this study develops an efficient Reduced Basis Method (RBM)-based discrete adjoint sensitivity analysis method, which on the one hand significantly
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Compressed M-SIDH: an instance of compressed SIDH-like schemes with isogenies of highly composite degrees Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-05 Kaizhan Lin, Jianming Lin, Shiping Cai, Weize Wang, Chang-An Zhao
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Extremal regular graphs and hypergraphs related to fractional repetition codes Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-05
Abstract Fractional repetition codes (FRCs) are a special family of storage codes with the repair-by-transfer property in distributed storage systems. Constructions of FRCs are naturally related to combinatorial designs, graphs, and hypergraphs. In this paper, we consider an extremal problem on regular graphs related to FRCs where each packet is stored on \(\rho =2\) nodes. The problem asks for the
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Linear codes associated to determinantal varieties in the space of hermitian matrices Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-05 Kanchan Singh, Ritesh Kumar Pathak, Sheo Kumar Singh
We introduce a new class of linear codes over a finite field associated to determinantal varieties in the space of hermitian matrices and determine their length, dimension and minimum distance along with the weight spectrum.
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Numerical study of two operator splitting localized radial basis function method for Allen–Cahn problem Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-05 Mahdi Emamjomeh, Mohammad Nabati, Abdollah Dinmohammadi
In this article, we will explore the numerical simulation of the Allen–Cahn equation and provide effective combination methods to efficiently solve it. The Allen–Cahn equation, an equation of mathematical physics, represents a singularly perturbed reaction–diffusion phenomenon that elucidates the phase separation mechanism occurring in multi-component alloy systems. Finding a numerical solution for
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Development of GDDR method for ratcheting analysis of moderately thick plates Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-05 Seyed Iman Shahraini, Mehran Kadkhodayan, Hoda Aslani
In the present paper, a previously introduced numerical method, GDDR (Generalized Differential Dynamic Relaxation), is developed to analyze ratcheting behavior of moderately thick rectangular plates. The validity of the method is verified by comparison with literature data and finite element method results. Classical Plate Theory (CPT) and First-order Shear Deformation Theory (FSDT) are utilized to
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Study on meso‑mechanical properties and failure mechanism of soil-rock mixture based on SPH model Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-05 Gang Zhong, Xiaoqiang Zhang, Shunchuan Wu, Haoyang Wu, Xiong Song
This study adopts the Smoothed Particle Hydrodynamics (SPH) technique to accurately and efficiently replicate and forecast the mesoscopic behavior of soil-rock mixtures (SRM). It introduces a novel approach for generating rock blocks within the SRM, utilizing a method that randomly selects angles and lengths. In addition, this research proposes a method for discretizing any shaped region into free
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Large Hermitian hull GRS codes of any given length Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-04 Hao Chen
The construction of Hermitian self-orthogonal generalized Reed-Solomon (GRS) codes of many specific lengths and large dimensions has been an active topic. The construction of Euclidean self-dual GRS codes and twisted generalized Reed-Solomon (TGRS) codes attracts some attentions. In this paper, we construct GRS \([n, k, n-k+1]_{q^2}\) codes (thus MDS codes) over \(\textbf{F}_{q^2}\) of the arbitrary
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Twisted skew G-codes Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-04 Angelot Behajaina, Martino Borello, Javier de la Cruz, Wolfgang Willems
In this paper we investigate left ideals as codes in twisted skew group rings. The considered rings, which are in most cases algebras over a finite field, allow us to retrieve many of the well-known codes. The presentation, given here, unifies the concept of group codes, twisted group codes and skew group codes.
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Combining MILP modeling with algebraic bias evaluation for linear mask search: improved fast correlation attacks on SNOW Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-03-04
Abstract The Mixed Integer Linear Programming (MILP) technique has been widely applied in the realm of symmetric-key cryptanalysis. In this paper, we propose a new bitwise breakdown MILP modeling strategy for describing the linear propagation rules of modular addition-based operations. We apply such new techniques to cryptanalysis of the SNOW stream cipher family and find new linear masks: we use the
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Natural convection analysis of magnetic nanofluid in fluid-magnetic coupled filed using the peridynamic differential operator Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-02 Zhanqi Cheng, Xihong Zhang, Yang Yang
In this paper, an updated Lagrangian method based on peridynamic differential operator (PDDO) is proposed to study the natural convection and heat transfer of magnetic nanofluids under the fluid and magnetic coupled filed. The governing Navier-Stokes equations considering the effects of Lorentz force in Magnetohydrodynamics (MHD) and the magnetization intensity in Ferrohydrodynamics (FHD) are reformulated
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Assessment of the edge-based smoothed finite element method for dynamic analysis of the multi-phase magneto-electro-elastic structures Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-03-01 Zhilong Jiang, Qiang Gui, Wei Li, Yingbin Chai
The dynamic behaviors of the well-known multi-phase magneto-electro-elastic (MEE) structures usually receive much attention in designing various intelligent devices, and the finite element method (FEM) is an effective numerical procedure for MEE structural dynamics. However, the relatively high mesh quality is necessary for the FEM to generate reliable results because of the overestimation of stiffness
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Stress singularity analysis for the V-notch with a novel semi-analytical boundary element Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-29 Yifan Huang, Changzheng Cheng, Zongjun Hu, Djimédo Kondo, Raj Das
The stress singularity occurs near a V-notch. The conventional boundary element method can only approach to the exact results with gradually refined mesh. In this paper, by introducing the Williams asymptotic expansion, a novel semi-analytical element is proposed. The new element models the geometry and the known physical fields with linear interpolation, while the unknown physical fields will be simulated
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A novel nodal integration technique for meshfree methods based on the Cartesian transformation approach in the analysis of curved shells Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-29 Thien Tich Truong, Nha Thanh Nguyen, Dinh Kien Nguyen, Vay Siu Lo
In this paper, a novel nodal integration technique for meshfree methods is introduced. This technique is based on the idea of the Cartesian transformation method, which prevents the presence of background cells during the numerical integration process. The Gauss–Lobatto quadrature is used instead of the conventional Gaussian quadrature to create the integration points so that the integration points
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Simulation of the cancer cell growth and their invasion into healthy tissues using local radial basis function method Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-28 Fatemeh Asadi-Mehregan, Pouria Assari, Mehdi Dehghan
Applying mathematical models to simulate dynamic biological processes has been a common practice for a long time. In recent decades, cancer research has also adopted this approach to understand how cancer cell populations grow and spread. This study focuses on a mathematical model that uses a system of PDEs to explain the time-dependent reaction–diffusion interaction among cancer cells, extracellular
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Unified layer-wise model for magneto-electric shells with complex geometry Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-28 J.C. Monge, J.L. Mantari, M.N. Llosa, M.A. Hinostroza
This paper presents a polynomial layer-wise model in the framework of Carrera's Unified Formulation for the bending analysis of a magneto-electric shells with variable radii of curvature. A parametric surface is used to model the middle surface of the shell. Lame Parameters and Radius of Curvature are calculated by using Differential Geometry. The mechanical displacement, along with the electric and
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3D meshless modeling of piezoelectric structure based on the radial point interpolation method Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-27 Ying He, Jiwei Li
Piezoelectric materials find widespread applications in high-precision actuators and sensors. However, the traditional finite element method falls short in meeting the simulation needs of piezoelectric structures due to complexities in mesh generation and precision requirements for accurate simulations. This paper focuses on adapting and generalizing the meshless modeling technique based on the radial
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A conceptually simple and generic construction of plaintext checkable encryption in the standard model Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-02-24
Abstract Plaintext-checkable encryption (PCE) can support searches over ciphertext by directly using plaintext. The functionality of a search is modeled by a specific check algorithm that takes a pair of target plaintext and ciphertext as input and returns 1 if the correct decryption result of the ciphertext is identical to the target plaintext. A trivial solution is to use an existing scheme (e.g
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Leakage-resilient $$\textsf {IBE} $$ / $$\textsf {ABE} $$ with optimal leakage rates from lattices Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-02-24 Qiqi Lai, Feng-Hao Liu, Zhedong Wang
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Numerical modeling techniques for shield tunnel lining structure using the numerical manifold method (NMM) Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-24 Pengfei Yan, Bangke Ren, Yongchang Cai
An advanced and reasonable calculation for lining structure is very import for rapid structural design and safe construction of shield tunnel. This work extends the numerical manifold method (NMM) for simulating shield tunnel lining structure. In the present method, a contact model based on virtual thin layer is developed for simulating the complex mechanical behaviors of segmental joint. The steel
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A GFDM approach based on the finite pointset method for two-dimensional piezoelectric problems Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-24 Felix R. Saucedo-Zendejo, Jorge L. Medrano-Mendieta, Adriana G. Nuñez-Briones
In this article a novel Generalized Finite Difference Method (GFDM) derived from the so-called Finite Pointset Method (FPM) is presented and discussed for the first time to solve two-dimensional piezoelectric structures. In this approach, the approximation of the field variables depends on both the governing equations and the local problem discretization, and it incorporates the minimization of the
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A meshless method based on the modified moving Kriging interpolation for numerical solution of space-fractional diffusion equation Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-24 A. Habibirad, O. Baghani, E. Hesameddini, M.H. Heydari, H. Azin
Fractional differential equations (FDEs) offer numerous capabilities for modeling unusual phenomena. So, the study of these models is essential. This paper proposes an efficient meshless technique for obtaining the numerical solution of a space fractional diffusion model with Caputo derivative type. Typically, in a meshless processes based on moving Kriging (MK) interpolation, the MK technique is used
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Self-dual codes from a block matrix construction characterised by group rings Des. Codes Cryptogr. (IF 1.6) Pub Date : 2024-02-22 Adam Michael Roberts
We give a new technique for constructing self-dual codes based on a block matrix whose blocks arise from group rings and orthogonal matrices. The technique can be used to construct self-dual codes over finite commutative Frobenius rings of characteristic 2. We give and prove the necessary conditions needed for the technique to produce self-dual codes. We also establish the connection between self-dual
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Recent trends and new developments in molecular dynamics and lattice Boltzmann methods Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-23 Arash Karimipour
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A unified formulation and the boundary discontinuous Fourier method for clamped functionally graded shells Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-23 RW Laureano, JL Mantari, J Yarasca, AS Oktem, J Monge, Xueqian Zhou
In the present work, analytical numerical solutions of the static behavior of fully clamped functionally graded (FG) doubly-curved panels are presented. The mechanical model is based on the Carrera Unified Formulation (CUF) under the Equivalent-Single-Layer (ESL) approach. The governing equations, in their strong form, are derived from the Principle of Virtual Displacements (PVD). The main novelty
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A novel highly accurate Trefftz attitude towards bending and free vibration analysis of doubly-curved laminated and sandwich shallow shells Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-23 Ali Reza Motamedi, Nima Noormohammadi, Bijan Boroomand
This paper extends the meshless local exponential basis functions to the analysis of doubly curved laminated and sandwich shallow shells. The method discretizes the shell domain by some nodes at which the degrees of freedom are defined. A specific number of nearby nodes, only based on their distance, are selected as a cloud. Within every cloud, the total solution is set in homogeneous and particular
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Numerical modelling of CO2 leakage through fractured caprock using an extended numerical manifold method Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-23 Hao Sun, Chao jia, Feng Xiong, Zhijun Wu
In this study, the cohesive element-based numerical manifold method (Co-NMM) and unified pipe network method (UPM) are further developed and integrated to analyze the CO leakage through fractured caprock considering CO-water two-phase flow, CO adsorption and deformation of both caprock matrix and fractures. First, the Co-NMM is modified to better treat complex discrete fracture networks (DFNs) problems
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A note on a generalized Jordan form of an infinite upper triangular matrix Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-02-21 Adel Abyzov, Alexander Maklakov
In this paper, several equivalent conditions for the existence of a generalized Jordan form for matrices of locally nilpotent linear operators acting on an infinite countable dimensional vector spa...
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Existence and uniqueness of solutions for Leontief's Input–Output Model, graph theory and sensitivity analysis Linear Multilinear Algebra (IF 1.1) Pub Date : 2024-02-20 José Carlos Bellido, Luis Felipe Prieto-Martínez
We provide a complete study of existence and uniqueness (uniqueness up to multiples in the case d=0) of non-negative and non-trivial solutions x for the linear system (I−A)x=d with A≥0,d≥0 (which, ...
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Analysis of the vibration mitigation effects of pile barrier in unsaturated ground using the coupled BE and FE method Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-22 Shaoyi Li
The ground vibration mitigation effects of pile barriers in unsaturated ground were analysed numerically. The numerical model for the ground was established using the boundary element method (BEM) with the soil being simulated as the unsaturated poroviscoelastic medium. To solve the boundary element governing equations, the fundamental Green solutions of the unsaturated medium was derived using the
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Modeling and experiments on the vibro-acoustic analysis of ring stiffened cylindrical shells with internal bulkheads: A comparative study Eng. Anal. Bound. Elem. (IF 3.3) Pub Date : 2024-02-21 Cong Gao, Jiawei Xu, Fuzhen Pang, Haichao Li, Kai Wang
The vibro-acoustic response of ring stiffened cylindrical shells with internal bulkheads under forced excitation is presented. The numerical analysis model is established using the Jacobi Ritz-Boundary element method. The first-order shear deformation theory, multi-segment technique and artificial spring technology are applied to establish the theoretical model, and the Jacobi orthogonal polynomials