Results 61 to 70 of about 1,535 (266)
Chemie Ingenieur Technik, EarlyView.This study explores the process chain for reverse engineering and additive manufacturing of a water pump impeller in a process plant. Key aspects include digital twin creation, CAD redesign, material certification, Hirtisation postprocessing, and performance testing. Insights highlight iterative design for improved precision and reliability.
Michael Stadler +3 more
wiley +1 more source
On Mathematical Models Based on Delay Differential Equations in Epidemiology
Applied SciencesThis paper examines solutions to mathematical models based on functional-differential equations, which have applications in immunology. This new approach allows us to study discontinuous solutions that more accurately depict real-world phenomena. It also
Mieczysław Cichoń, Kinga Cichoń
doaj +1 more source
Journal of Applied Mathematics, 2012 Using two successive reductions: B-equivalence of the system on a variable time scale to a system on a time scale and a reduction to an impulsive differential equation and by Leggett-Williams fixed point theorem, we investigate the existence of three ...
Yongkun Li, Chao Wang
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p-Moment stability of functional differential equations with random impulses
Computers & Mathematics with Applications, 2006 Functional differential equations with random impulses \[ x'(t)= f(t, x_t),\;t\geq t_0,\;t\neq\xi_k,\;x(\xi_k)= I(\tau_k, x(\xi^-_k)),\;k= 1,2,\dots, x_{t_0}= \varphi\tag{1} \] are considered. The following stability conditions were obtained by using Lyapunov's method with Razumikhin condition. Theorem. Let \(x(t)\) be a solution of system (1) and \(p>
Shujin Wu, Xiaolin Guo, Yong Zhou
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Clathrate hydrate crystallization
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley +1 more source
Lipschitz stability of impulsive functional-differential equations [PDF]
The ANZIAM Journal, 1999 AbstractAn initial value problem is considered for impulsive functional-differential equations. The impulses occur at fixed moments of time. Sufficient conditions are found for Lipschitz stability of the zero solution of these equations. An application in impulsive population dynamics is also discussed.
Bainov, D. D., Stamova, I. M.
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Review of CFD modelling techniques for single‐phase and multiphase flow in static mixers
The Canadian Journal of Chemical Engineering, EarlyView.This review synthesizes computational fluid dynamics (CFD) approaches for static mixers, linking hydrodynamics to pressure drop, particle/droplet distributions, mixing metrics, and heat‐transfer performance to guide modelling choices and design decisions. Abstract Static mixers enable compact and low‐energy intensification.
Jussan Jaeger +7 more
wiley +1 more source
Strict stability of impulsive functional differential equations
Journal of Mathematical Analysis and Applications, 2005 The authors apply Lyapunov functionals and Razumikhin technique to prove some results on strict uniform stability or Lyapunov's uniform asymptotic stability of the trivial solution of a retarded functional-differential equation with fixed times of impulsive effects.
Zhang, Yu, Sun, Jitao
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Boundary value problems for a class of impulsive functional equations
, 2008 This paper is related to the existence and approximation of solutions for impulsive functional differential equations with periodic boundary conditions.
Nieto, Juan J. +1 more
core +1 more source
Review and prospects of shear test of bolted rock joints
Deep Underground Science and Engineering, EarlyView.The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren +4 more
wiley +1 more source