Results 41 to 50 of about 474 (134)

Nonsmooth Modeling of Computer Virus Propagation

Mathematics
Most previous computer virus propagation (CVP) models are smooth, meaning that their right-hand sides are continuously differentiable. However, recovery resources for compromised hosts are often limited, and the aggregate recovery rate may decrease once ...
Yiran Chen, Ning Liao, Xiaofan Yang, Feng Yang, Luxing Yang, Shangbo Zhou   +5 more
doaj   +1 more source

Fractional-Order SEIHR(D) Model for Nipah Virus with Spillover: Well-Posedness, Ulam–Hyers Stability, and Global Sensitivity

Abstract In this research, we create a new fractional-order SEIHRD framework to examine how the Nipah virus moves from one species to another (zoonotic spillover) and how it later spreads throughout a community (via contact with one another) or in a hospital or isolation situation (via entering into a hospital or being placed under ...
Taylan Demir, Hasan Hüseyin Tosunoğlu
openaire   +1 more source

Bregman Wave Distribution Function Method

Radio Science, Volume 61, Issue 7, July 2026.
Abstract This study proposes a wave distribution function (WDF) estimation method based on minimizing the Bregman divergence in the function space. The proposed method is entirely data‐driven and requires no hyperparameter tuning during the estimation process. It can be regarded as an extension of the maximum entropy method.
Ryosei Nakazawa, Mamoru Ota, Yoshiya Kasahara   +2 more
wiley   +1 more source

A sustainable method for analyzing and studying the fractional-order panic spreading caused by the COVID-19 pandemic

Partial Differential Equations in Applied Mathematics
This study gives us an expression of non-integer order in mathematics via fractional Caputo operator just for the broadcast development of different emotions under emergencies due to any situation or some disease.
Muhammad Farman, Evern Hincal, Parvaiz Ahmad Naik, Ali Hasan, Aceng Sambas, Kottakkaran Sooppy Nisar   +5 more
doaj   +1 more source

Rainfall Field Reconstruction From Commercial Microwave Links via a Conditional Diffusion Model

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract High‐resolution rainfall field reconstruction is a critical task in hydrological applications, with significant implications for flood forecasting, water resource management, and urban resilience. Conventional remote sensing instruments such as rain gauges and weather radars suffer from sparse coverage or high operational costs, while ...
Xinwu Ji, Yicheng Cai, Xin Zheng, JiaQuan Wan, Yufang Shen, Tao Yang, Ji Chen   +6 more
wiley   +1 more source

A Data‐Driven Multiscale Scheme for Anisotropic Finite Strain Magneto‐Elasticity

International Journal for Numerical Methods in Engineering, Volume 127, Issue 12, 30 June 2026.
ABSTRACT In this work, we develop a neural network‐based, data‐driven, decoupled multiscale scheme for the modeling of structured magnetically soft magnetorheological elastomers (MREs). On the microscale, sampled magneto‐mechanical loading paths are imposed on a representative volume element containing spherical particles and an elastomer matrix, and ...
Heinrich T. Roth, Philipp Gebhart, Karl A. Kalina, Thomas Wallmersperger, Markus Kästner   +4 more
wiley   +1 more source

Toward Super‐Resolution Reconstruction of Diffusion–Relaxation MRI Using Slice Excitation With Random Overlap (SERO)

Magnetic Resonance in Medicine, Volume 95, Issue 6, Page 3213-3226, June 2026.
ABSTRACT Purpose Diffusion MRI probes tissue microstructure, but low SNR and limited resolution hinder detection of features and parameter estimates. We introduce slice excitation with random overlap (SERO), which enables variable repetition times (TRs) and diffusion weighting within a single shot.
Felix Mortensen, Jakub Jurek, Jens Sjölund, Geraline Vis, Ronnie Wirestam, Malwina Molendowska, Andrzej Materka, Filip Szczepankiewicz   +7 more
wiley   +1 more source

Robust Linearization and Eigenvalue Analysis of General Complex Constrained Multibody Systems

International Journal of Mechanical System Dynamics, Volume 6, Issue 2, Page 187-203, June 2026.
ABSTRACT The derivation of linearized equations and subsequent eigenvalue analysis is the basis for tasks such as frequency‐domain response analysis, control design, and stability assessment for mechanical systems. However, for general multibody systems with redundant or nonholonomic constraints, practical challenges persist in achieving numerically ...
Zhiwen Xiao, Gexue Ren
wiley   +1 more source

A fractional–order model with prevention and isolation optimal control measures to reduce the transmission of Tuberculosis

Journal of Taibah University for Science
In this research paper, we develop a fractional mathematical model consisting of a system of four fractional differential equations (FDEs) utilizing the Caputo operator.
A. El-Mesady, A. M. S. Mahdy, Fatma Özköse   +2 more
doaj   +1 more source

Mathematical model of immune response to Hepatitis C virus (HCV) disease

Partial Differential Equations in Applied Mathematics
This paper presents a mathematical model that comprehensively analyzes the dynamics of Hepatitis C Virus (HCV) infection. The model based on a system of nonlinear differential equations captures the interactions between liver cells (hepatocytes), the ...
Amna H.A. Ibrahim, Hermane Mambili Mamboundou   +1 more
doaj   +1 more source