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This paper details the construction of an analytical performance model of HYDRA, a production nonlinear multigrid solver used by Rolls-Royce for computational fluid dynamics simulations. The model captures both the computational behaviour of HYDRA's key subroutines and the behaviour of its proprietary communication library, OPlus, with an absolute error consistently under 16% on up to 384 cores of...
The main goal of this paper is to introduce the tool Kaira that we are developing. This tool is intended for modelling, simulation and generation of parallel applications. A developer is able to model parallel programs and different aspects of communication using Kaira. The used model is based on the variant of Coloured Petri Nets. Coloured Petri Nets provide the theoretical background. We use their...
A library of components for simulation and analysis of large vehicular electrical power systems using Modelica language is presented. Components are described using different levels of model complexity, catering for both detailed high fidelity transient switching dynamics and averaged value descriptions which, being time invariant, are a computationally efficient and useful tool for design, stability...
The paper presents basics to use a compact menu-driven freeware bond graph block library for teaching power oriented modelling. Such energy domain independent modelling methods preserve the physical system structure, are applicably on conventional software and offer furthermore the use of common control structures or analysis tools. Models of electrical machines illustrate the features.
To unveil the potential of reconfigurable systems, strong tool support is required. In particular the modeling and implementation of designs to be executed using the partially reconfigurable capability of modern FPGAs is challenging and hardly supported by current design tools. A key problem thereby is the generation of partial bitstreams. The presented design tool Part-E tackles these challenges...
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