Results 21 to 30 of about 425,063 (266)

A preconditioned fast collocation method for a linear bond-based peridynamic model

Advances in Difference Equations, 2020
We develop a fast collocation method for a static bond-based peridynamic model. Based on the analysis of the structure of the stiffness matrix, a fast matrix-vector multiplication technique was found, which can be used in the Krylov subspace iteration ...
Xuhao Zhang, Xiao Li, Aijie Cheng, Hong Wang   +3 more
doaj   +1 more source

Walsh–Hadamard Kernel Feature-Based Image Compression Using DCT with Bi-Level Quantization

Computers, 2022
To meet the high bit rate requirements in many multimedia applications, a lossy image compression algorithm based on Walsh–Hadamard kernel-based feature extraction, discrete cosine transform (DCT), and bi-level quantization is proposed in this paper. The
Dibyalekha Nayak, Kananbala Ray, Tejaswini Kar, Chiman Kwan   +3 more
doaj   +1 more source

UTILIZING CONCEPTUAL MODELING IN THE STUDY OF ONE OF THE IRANIAN FRACTURED CARBONATE RESERVOIRS [PDF]

Journal of Petroleum Science and Technology, 2013
A typical Iranian carbonate matrix block surrounded by an open fracture was modeled in order to understand the fracture-matrix interaction and realize how to model the interaction best. The modeling was carried out by using a fine-scaled Eclipse model in
seyed Majid Hashemi, Gholamreza Bashiri
doaj   +1 more source

Some New Algebraic Method Developments in the Characterization of Matrix Equalities

Axioms
Algebraic expressions and equalities can be constructed arbitrarily in a given algebraic framework according to the operational rules provided, and thus it is a prominent and necessary task in mathematics and applications to construct, classify, and ...
Yongge Tian
doaj   +1 more source

Representations of group rings and groups [PDF]

International Journal of Group Theory, 2018
An isomorphism between the group ring of a finite group and a ring of certain block diagonal matrices is established. It is shown that for any group ring matrix $A$ of $mathbb{C} G$ there exists a matrix $U$ (independent of $A$) such that $U^{-1}AU= diag(
Ted Hurley
doaj   +1 more source

Optical solitary wave solutions in generalized determinant form for Kundu–Eckhaus equation

Results in Physics, 2023
The Kundu–Eckhaus (KE) equation describes the propagation of ultra-short femtosecond pulses in optical fibers. In this paper, on the basis of Hirota bilinear form of KE equation, a complex matrix is introduced into the differential relation satisfied by ...
Gui-Min Yue, Xiang-Hua Meng
doaj   +1 more source

Cross-social-network user alignment research based on multi-dimensional user features

Systems Science & Control Engineering
Accurately aligning the same users on different flat social networks to merge user information and create more nuanced user profiles is critical. However, the current research in this area faces challenges related to low efficiency and inadequate ...
Tao Zhao, Heng Gao, Zecheng Wang, Dianjie Bi, Xuemin Chen   +4 more
doaj   +1 more source

Latent Multi-View Semi-Nonnegative Matrix Factorization with Block Diagonal Constraint

Axioms, 2022
Multi-view clustering algorithms based on matrix factorization have gained enormous development in recent years. Although these algorithms have gained impressive results, they typically neglect the spatial structures that the latent data representation ...
Lin Yuan, Xiaofei Yang, Zhiwei Xing, Yingcang Ma   +3 more
doaj   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Optimal sampling algorithms for block matrix multiplication

Journal of Computational and Applied Mathematics, 2023
In this paper, we investigate the randomized algorithms for block matrix multiplication from random sampling perspective. Based on the A-optimal design criterion, the optimal sampling probabilities and sampling block sizes are obtained. To improve the practicability of the block sizes, two modified ones with less computation cost are provided.
Chengmei Niu, Hanyu Li
openaire   +3 more sources