نتایج جستجو برای: computational simulations

تعداد نتایج: 481518  

2016
H.-H. Hinrichsen B. von Dewitz J. Dierking

H.-H. Hinrichsen1, B. von Dewitz1, J. Dierking1, H. Haslob2, A. Makarchouk3, C. Petereit1 and R. Voss4 1GEOMAR – Helmholtz Centre for Ocean Research, Düsternbrooker Weg 20, 24105 Kiel, Germany 2Thünen-Institute of Sea Fisheries, Palmaille 9, 22767 Hamburg, Germany 3Fishery Resources Research Department, Institute of Food Safety, Animal Health and Environment ‘BIOR’, Daugavgrivas 8, Riga 1048, L...

In the past years, a number of algorithms have been introduced for synthesis aperture radar (SAR) imaging. However, they all suffer from the same problem: The data size to process is considerably large. In recent years, compressive sensing and sparse representation of the signal in SAR has gained a significant research interest. This method offers the advantage of reducing the sampling rate, bu...

2009
Matthew G. Doyle Stavros Tavoularis Yves Bourgault

Simulations of the mechanics of the left ventricle of the heart with fluid-structure interaction benefit greatly from the parallel processing power of a high performance computing cluster, such as HPCVL. The objective of this paper is to describe the computational requirements for our simulations. Results of parallelization studies show that, as expected, increasing the number of threads per jo...

Journal: :Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention 2006
Johan Svensson Roland Gårdhagen Einar Heiberg Tino Ebbers Dan Loyd Toste Länne Matts Karlsson

Patient specific modelling of the blood flow through the human aorta is performed using computational fluid dynamics (CFD) and magnetic resonance imaging (MRI). Velocity patterns are compared between computer simulations and measurements. The workflow includes several steps: MRI measurement to obtain both geometry and velocity, an automatic levelset segmentation followed by meshing of the geome...

2015
Qiqi Wang

Aerospace engineers have always been leading in the field of design using computational simulations. We design vehicles that go fast, fly high, and operate in extreme conditions. Because computation can help reduce expensive tests that physically simulate these extreme conditions, we benefit from computational simulation and design. This is why successful aerospace companies and agencies, such ...

Journal: :international journal of iron & steel society of iran 2009
f. forouzan a. najafizadeh a. kermanpur a. hedayati

an artificial neural network (ann) model is developed for the analysis, simulation, and prediction of the austenite reversion in the thermo-mechanical treatment of 304l austenitic stainless steel. the results of the ann model are in good agreement with the experimental data. the model is used to predict an appropriate annealing condition for austenite reversion through the martensite to austeni...

Journal: :فیزیک زمین و فضا 0
سرمد قادر استادیار، گروه فیزیک فضا، مؤسسة ژئوفیزیک دانشگاه تهران، ایران عباسعلی علی اکبری بیدختی استاد، گروه فیزیک فضا، مؤسسة ژئوفیزیک، دانشگاه تهران، ایران سعید فلاحت دانشجوی کارشناسی ارشد ژئوفیزیک، گروه فیزیک فضا، مؤسسة ژئوفیزیک دانشگاه تهران، ایران

the compact finite difference schemes have been found to give simple ways of reaching the objectives of high accuracy and low computational cost. during the past two decades, the compact schemes have been used extensively for numerical simulation of various fluid dynamics problems. these methods have also been applied for numerical solution of some prototype geophysical fluid dynamics problems ...

Journal: :Concurrency and Computation: Practice and Experience 2014
Zhiquan Sui Neil Harvey Shrideep Pallickara

Discrete event simulations are a powerful technique for modeling stochastic systems with multiple components where interactions between these components are governed by the probability distribution functions associated with them. Complex discrete event simulations are often computationally intensive with long completion times. This paper describes our solution to the problem of orchestrating th...

Journal: :CoRR 2007
Taizo Kobayashi Toshiya Takami Kin'ya Takahashi Ryota Mibu Mutsumi Aoyagi

Total computational costs of scientific simulations are analyzed between direct numerical simulations (DNS) and multiphysics simulations (MPS) for sound generation in musical instruments. In order to produce acoustic sound by a turbulent flow in a simple recorder-like instrument, compressible fluid dynamic calculations with a low Mach number are required around the edges and the resonator of th...

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