نتایج جستجو برای: parallel systems efficiency
تعداد نتایج: 1686987 فیلتر نتایج به سال:
We present a linear time algorithm for improving the time efficiency for a partition of a computing system into a parallel program with synchronous communication based on the program syntax. The technique can be used for for optimizing parallel and distributed systems or in hardware/software codesign.
With the increasing emphasis on data warehouse systems, the efficiency of complex analytical queries in such systems has become an important issue. Such queries posed challenging performance problems that initiated the use of parallel database systems and parallel algorithms in data warehouse environments. Many of these have been proposed in recent years but a review of the literature to our kn...
In this paper, we present and analyze the performance of a fast parallel distributed computing time integration procedure for systems of Reaction-Convection-Diffusion equations. Typical applications include large scale computing of air quality models or population models in biology for which the main solver corresponds to a ReactionConvection-Diffusion operator. One starts from a stabilized exp...
This paper describes the design and implementation of functionally distributed control architecture for real-time control of robot systems. Robot systems must control several functions in parallel for decision, action, and recognition. In order to fulfill this requirement, we propose the architecture based on parallel/distributed control. The robot system based on this architecture is designed ...
The parallel properties of three fast direct solution methods for linear systems with separable block tridiagonal matrices and a related C/MPI code are studied. Fast algorithm for separation of variables and two variants of the generalized marching algorithm are first summarized. The results from numerical tests performed on two coarse-grained parallel architectures are then reported. The obtai...
In this paper, TOPAS1 a new parallel programming environment for distributed systems is presented. TOPAS automatically analyzes data dependence among tasks and synchronizes data, which reduces the time needed for parallel program developments. TOPAS also provides supports for scheduling, dynamic load balancing and fault tolerance. Experiments show simplicity and efficiency of parallel programmi...
In this paper, we propose to estimate the normalizing constants for simulated tempering by a modified histogram algorithm, the so-called contour Monte Carlo algorithm, and compare the efficiency of simulated tempering and parallel tempering. Our analysis reveals that simulated tempering tends to mix faster than parallel tempering at low temperature levels for simulating from complex systems. Th...
Distributed or parallel rule-based systems are currently needed for real applications. The proposed architecture of such a system is based on a wrapper allowing the cooperation between several instances of the rule-based system running on different computers of a cluster. As case study a parallel version of the Java Expert System Shell is built. Initial tests show its efficiency when running cl...
For solving systems of linear algebraic equations with blockfivediagonal matrices arising in geoelectrics and diffusion problems, the parallel matrix square root method, conjugate gradient method with preconditioner, conjugate gradient method with regularization, and parallel matrix sweep algorithm are proposed and some of them are implemented numerically on multi-core CPU Intel. Investigation ...
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