The simulation of incompressible fluids is one of the important problem classes in computational fluid dynamics. We consider a simulation algorithm for the convection in binary fluid mixtures, a problem where a quite ...
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ISBN:
(纸本)0769500595
The simulation of incompressible fluids is one of the important problem classes in computational fluid dynamics. We consider a simulation algorithm for the convection in binary fluid mixtures, a problem where a quite simple model describes a very complex behavior: In a parallel implementation on an IBM SP2, we investigate several implementation strategies involving different data layouts and communication organizations.
作者：
Rosato, VPucello, NENEA
HPCN Project Ente Nuove Tecnol Energia & Ambiente I-00100 Rome Italy
A code for Me simulation of X-ray diffraction pattern of a powder has been implemented on a massively parallel SIMD platform developed in the frame of the PQE2000 Project. The code allows the evaluation of the diffrac...
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ISBN:
(纸本)0769500595
A code for Me simulation of X-ray diffraction pattern of a powder has been implemented on a massively parallel SIMD platform developed in the frame of the PQE2000 Project. The code allows the evaluation of the diffraction pattern of atomic-scale models of both perfectly ordered and disordered structures. The code has been wed to investigate the structures resulting from the non-equilibrium alloying process of an immiscible metallic couple (Ag-Cu).
We show that the latest version of massively parallelprocessing associative string processing architecture (System-V) is applicable for fast Monte Carlo simulation if an effective on-processor random number generator ...
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ISBN:
(纸本)0769500595
We show that the latest version of massively parallelprocessing associative string processing architecture (System-V) is applicable for fast Monte Carlo simulation if an effective on-processor random number generator is implemented. Our lagged Fibonacci generator can produce 10(8) random numbers on a processor string of 12K PE-s. The time dependent Monte Carlo algorithm of the one-dimensional non-equilibrium kinetic Ising model perfoms 80 faster than the corresponding serial algorithm on a 300 MHz UltraSparc.
This paper considers the application of bio-inspired systems in the design of a novel and highly parallel image processing tool to detect edges within conventional grey-scale images. The aim of the work is to implemen...
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ISBN:
(纸本)0769500595
This paper considers the application of bio-inspired systems in the design of a novel and highly parallel image processing tool to detect edges within conventional grey-scale images. The aim of the work is to implement a new image processing architecture through evolvable hardware that is able to adapt according to the particular images encountered The simulation of such a system through the toe of evolutionary algorithms and genetic programming is demonstrated for rite conventional image processing operation of edge detection. Results al-e presented for this system and evaluated with respect to a conventional Sobel edge detector.
parallel discrete event simulation algorithms are usually based on time stamp ordering of events. distributed virtual environment (DVE) applications such as DIS typically use unordered event delivery. A partial order ...
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parallel discrete event simulation algorithms are usually based on time stamp ordering of events. distributed virtual environment (DVE) applications such as DIS typically use unordered event delivery. A partial order called approximate time (AT) is proposed to order events in both domains, facilitating reuse of simulations across DVE and analysis applications. A variation on AT-order called approximate time causal (ATC) order is also described. Synchronisation algorithms to realize these orderings are presented as well as performance measurements on a workstation cluster. A long-term goal of this work is to use AT and ATC order to exploit temporal uncertainty in the model to achieve efficient conservative parallelsimulation despite little or no lookahead, a long-standing problem in the field.
The paper describes the design and implementation of a security architecture for a HLA/RTI prototype developed at ONERA/CERT. The major security objective is to protect the intellectual property of firms participating...
Most successful examples of parallelsimulation models were developed for parallel execution, from the beginning. A number of simulation models are designed only for sequential simulation, even in languages like PARSE...
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Most successful examples of parallelsimulation models were developed for parallel execution, from the beginning. A number of simulation models are designed only for sequential simulation, even in languages like PARSEC, that support both sequential and parallelsimulation algorithms. Converting such simulation models to a form that yields good performance with a parallel implementation can be non-trivial. We describe a case study showing this conversion process for a simulation model of replicated file systems. The details of the major steps taken in converting the simulation into a parallelsimulation are presented: correctness changes; performance changes such as communication topology simplification and lookahead specification; and modeling changes to eliminate performance bottlenecks. The details and performance improvements of each step are presented.
We present a parallel simulator (SWiMNet) for PCS networks using a combination of optimistic and conservative paradigms. The proposed methodology exploits event precomputation permitted by model independence within th...
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We present a parallel simulator (SWiMNet) for PCS networks using a combination of optimistic and conservative paradigms. The proposed methodology exploits event precomputation permitted by model independence within the PCS components. The low percentage of blocked calls is exploited in the channel allocation simulation of precomputed events by means of an optimistic approach. Experiments were conducted with various call arrival rates and mobile host densities on a cluster of Pentium workstations. Performance results indicate that the SWiMNet achieves a speedup of 6 employing 8 workstations, and a speedup of 12 with 16 workstations.
The proceedings contain 15 papers. The topics discussed include: the convergence of multicast communication and active networking: opportunities for restructuring networked applications;distributed interaction in virt...
ISBN:
(纸本)0769504590
The proceedings contain 15 papers. The topics discussed include: the convergence of multicast communication and active networking: opportunities for restructuring networked applications;distributed interaction in virtual spaces;collaborative virtual environment standards: a performance evaluation;analysis of dead reckoning procedures by using hybrid automata;near real-time simulation of particle systems;object and ownership management in air traffic control simulations;distributed interactive learning environment;reliable multicast network transport for distributed virtual simulation;an approach for stream transmission over HIA-RTI in distributed virtual environments;performance analysis of packet bundling techniques in DIS;resolving concurrent interactions;HLA support in a discrete event simulation language;ruminations on the implications of multi-resolution modeling on DIS/HLA;design and implementation of a distributed interactive simulation security architecture;simulation of multimedia systems based on actors and QoS-synchronizers;and agent-aided collaborative virtual environments over HLA/RTI.
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