High level data parallel languages such as Vienna Fortran and High Performance Fortran (HPF) have been introduced to allow the programming of massively parallel distributed memory machines at a relatively high level o...
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High level data parallel languages such as Vienna Fortran and High Performance Fortran (HPF) have been introduced to allow the programming of massively parallel distributed memory machines at a relatively high level of abstraction, based on the single program multiple data (SPMD) paradigm. Their main features include mechanisms for expressing the distribution of data across the processors of a machine. The paper introduces additional language functionality to allow the efficient processing of sparse matrix codes. It introduces methods for the representation and distribution of sparse matrices, which forms a powerful mechanism for storing and manipulating sparse matrices able to be efficiently implemented on massively parallel machines.< >
Introduces a digital hearing aid that compensates the signal spoken in sensorineural impaired listeners with the object of improving their intelligibility. The technique used is based on a digital analysis/synthesis o...
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Introduces a digital hearing aid that compensates the signal spoken in sensorineural impaired listeners with the object of improving their intelligibility. The technique used is based on a digital analysis/synthesis of speech; the authors divided the input signal into short time blocks then make a multiband analysis, nonlinear amplification and synthesis based on a sinusoidal model of the voice, according to the subject's dynamic range in that band. This system has been implemented in real-time using a DSP (TMS320C30) based microprocessor board within a host personal computer IBM PC, and one of the principal objectives of the project is to make an easy implementation VLSI system with low consumption for it to be a portable digital hearing aid.
Transport-triggered architectures are a new class of architectures that provide more scheduling freedom and have unique compiler optimizations. This paper reports experiments that quantify the advantages of transport-...
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ALBA, A parallel Language Based on Actors is a new programming language designed to take advantage of highly parallel architectures that use message passing as the fundamental low-level interaction primitive. In this ...
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This paper presents a hardware architecture and a software tool needed for future autonomous robots. Specific attention is given to the execution of artificial neural networks and to the need for a good inspection and...
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This paper presents a hardware architecture and a software tool needed for future autonomous robots. Specific attention is given to the execution of artificial neural networks and to the need for a good inspection and visualization tool when developing this kind of system. Achievable performance using state of the art technology is estimated and module miniaturization issues are discussed.
We point out some errors in the combinatorial approach for the steady-state analysis of a deterministic and stochastic Petri net (DSPN) presented by M. Lu, D. Zhang, and T. Murata (1990). However, the methodology for ...
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We point out some errors in the combinatorial approach for the steady-state analysis of a deterministic and stochastic Petri net (DSPN) presented by M. Lu, D. Zhang, and T. Murata (1990). However, the methodology for analyzing the self-stability of fault-tolerant clock synchronisation (FCS) systems introduced in that paper is applicable for FCS systems with many clocking modules, even if the combinatorial approach is not valid. This is due to the progress in improving the efficiency of the DSPN solution algorithm made in recent years. We show that the explicit computation of the steady-state solution of the DSPN can be performed with reasonable computational effort on a modern workstation by the software package DSPNexpress.< >
Numeric scientific problems have been the main focus of supercomputing as their numerous implementations on various multiprocessors indicate. Nonnumeric problems on the other hand have received very little attention f...
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ISBN:
(纸本)9780818666056
Numeric scientific problems have been the main focus of supercomputing as their numerous implementations on various multiprocessors indicate. Nonnumeric problems on the other hand have received very little attention for parallel implementation due to their irregular behaviors and a large amount of resource usage. This report presents our experiences implementing difficult nonnumeric problems on the EM-4 multiprocessor, believing that supercomputers should also be able to effectively execute nonnumeric problems if they are to be considered 'supercomputers'. We selected two typical search problems, the Eight-Puzzle and the Tower-of-Hanoi. Two parallel search techniques we used to implement the search problems, unidirectional and bidirectional heuristic search. A total of eight different programs have been implemented on the EM-4 multiprocessor with realistic problem sizes. Execution results demonstrate that the parallel bidirectional heuristic search can solve the tree depth 20 to 40 of the Eight-Puzzle in an optimal or near optimal number of iterations in less than two seconds, and is highly scalable as it gives over 40-fold speedup for both problems on 80 processors.< >
In this paper, we assert that window system plays a fundamental role in supporting multiple interaction channels distributed over a finite number of I/O devices. For historical as well as technical reasons, window sys...
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ISBN:
(纸本)0818664304
In this paper, we assert that window system plays a fundamental role in supporting multiple interaction channels distributed over a finite number of I/O devices. For historical as well as technical reasons, window systems usually deal with the issues which concern distribution of window system components, heterogeneity, user interface, multimedia, and distributed application support. We propose a minimal window system architecture which allows separate treatment of these issues. The minimal window-system architecture serves as a basis for discussing the influence of these issues on each other. Also in the viewpoint of the transparency facilities inherent in a distributed system, a window system model based on the minimal window system is proposed for the distributed environment.< >
We demonstrate a physically-based technique for predicting the drape of a wide variety of woven fabrics. The approach exploits a theoretical model that explicitly represents the microstructure of woven cloth with inte...
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