Results 31 to 40 of about 271,026 (169)

Reframing hydrology education to solve coupled human and environmental problems [PDF]

Hydrology and Earth System Sciences, 2012
The impact of human activity on the biophysical world raises myriad challenges for sustaining Earth system processes, ecosystem services, and human societies.
E. G. King, F. C. O'Donnell, K. K. Caylor   +2 more
doaj   +1 more source

Study on coupled problems of thermoelasticity in Strains [PDF]

E3S Web of Conferences
In the work, within the framework of the strain compatibility conditions of Saint-Venant, two equivalent dynamic boundary value problems of thermoelasticity with respect to strains are formulated.
Khaldjigitov Abduvali, Djumayozov Umidjon, Khasanova Zebo, Rakhmonova Robiya   +3 more
doaj   +1 more source

High Order Relaxation Methods for Co-simulation of Finite Element and Circuit Solvers

Advanced Electromagnetics, 2020
Coupled problems result in very stiff problems whose char- acteristic parameters differ with several orders in magni- tude. For such complex problems, solving them monolithi- cally becomes prohibitive.
J. D. Nshimiyimana, F. Plumier, C. Ndagije, J. Gyselinck, C. Geuzain   +4 more
doaj   +1 more source

Well-posedness of the microwave heating problem

Discrete and Continuous Models and Applied Computational Science
A number of initial boundary-value problems of classical mathematical physics is generally represented in the linear operator equation and its well-posedness and causality in a Hilbert space setting was established. If a problem has a unique solution and
Baljinnyam Tsangia
doaj   +1 more source

Multiobjective evolutionary optimization of MEMS structures

Computer Assisted Methods in Engineering and Science, 2017
The paper is devoted to the shape optimization of piezoelectric and electro-thermo-mechanical devices by the use of multiobjective evolutionary algorithm. In this paper, special implementation of multiobjective evolutionary algorithm is applied (MOOPTIM)
Adam Długosz
doaj  

Derivative-Free Iterative One-Step Reconstruction for Multispectral CT

Journal of Imaging
Image reconstruction in multispectral computed tomography (MSCT) requires solving a challenging nonlinear inverse problem, commonly tackled via iterative optimization algorithms.
Thomas Prohaszka, Lukas Neumann, Markus Haltmeier   +2 more
doaj   +1 more source

On the impact of inhomogeneities on vacancy diffusion controlled void and crack formation in SAC305 solder joints

Next Materials
At elevated temperatures, crack formation and propagation in metals are tied to thermodynamic processes like vacancy generation, diffusion, and condensation.
Wolfgang Flachberger, Jiri Svoboda, Peter Lutz, Charlotte Cui, Thomas Antretter, Manuel Petersmann, Swaroop Gaddikere-Nagaraja, Daniel Kiener, Roland Brunner   +8 more
doaj   +1 more source

On the Development of Efficient Solvers for Real-World Coupled Hydromechanical Simulations

Frontiers in Mechanical Engineering, 2022
Linear solvers usually are the most time- and memory-demanding part of a full coupled hydromechanical simulation. The typical block structure of the linearized systems arising from a fully-implicit solution approach requires the development of ...
Massimiliano Ferronato, Andrea Franceschini, Matteo Frigo   +2 more
doaj   +1 more source

Scale-invariance and the strong coupling problem [PDF]

Journal of Cosmology and Astroparticle Physics, 2011
The effective theory of adiabatic fluctuations around arbitrary Friedmann-Robertson-Walker backgrounds - both expanding and contracting - allows for more than one way to obtain scale-invariant two-point correlations. However, as we show in this paper, it is challenging to produce scale-invariant fluctuations that are weakly coupled over the range of ...
Baumann, Daniel, Senatore, Leonardo, Zaldarriaga, Matias   +2 more
openaire   +2 more sources

Experimentally validated numerical model of coupled flow, thermal and electromagnetic problem in small power electric motor

Computer Assisted Methods in Engineering and Science, 2017
This paper describes results of the mathematical modelling of the steady-state thermal phenomena taking place in a Fracmo 240 W DC electric motor. The model of the motor was defined in the ANSYS Fluent software to predict flow and temperature fields ...
Lukasz Slupik, Jacek Smolka, Luiz C. Wrobel   +2 more
doaj   +1 more source