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检索条件"主题词=Data Flow Computing"

共 877 条记录，以下是351-360 订阅

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Exploiting data Parallelism In Signal Processing On A data flow Machine

Exploiting Data Parallelism In Signal Processing On A Data F...

引用

Annual International Symposium on Computer Architecture, ISCA

作者： P. Nitezki Forschungszentrum Informatik Technische Expertensysteme und Robotik Germany

This paper will show that the massive data parallelism inherent to most signal processing tasks may be easily mapped onto the parallel structure of a data flow machine. A special system called STRUCTflow has been designed to optimize the static data flow model for hardware efficiency and low latency. The same abstractions from the general purpose data flow model that lead to a quasi systolic operation of the processing elements make explicit flow control of the data tokens as they pass through the arcs of the flow graph obsolete. We will describe the architecture of the system and discuss the restrictions on the structure of the flow graphs.

关键词： Signal processing Parallel processing Signal processing algorithms data structures flow graphs data flow computing Concurrent computing Permission Hardware Computer architecture

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data flow approach to self-timed logic in VLSI

Data flow approach to self-timed logic in VLSI

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： C.H. Lau D. Renshaw J. Mavor Department of Electrical Engineering Integrated Systems Group University of Edinburgh UK Dept. of Electr. Eng. Edinburgh Univ. UK

The author introduces a data-flow approach to the design of logic circuits in CMOS. A natural consequence of the data-flow model of logic operation is the self-timed behaviour of the resultant logic network. Circuits so designed exhibit correct sequencing behaviour, independent of the delay associated with the interconnection of logic operators. A CMOS implementation of data-flow operators based on differential cascode switch logic is presented. An example of a first-in, first-out (FIFO) memory is used to illustrate the technique.< >

关键词： Very large scale integration CMOS logic circuits Clocks Delay Control systems data flow computing Logic circuits Integrated circuit interconnections Switches flow graphs

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Unified specification of control and data flow

Unified specification of control and data flow

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： T. Grotker R. Schoenen H. Meyr Integrated Systems for Signal Processing RWTH Aachen University of Technology Aachen Germany

Many signal processing systems use event driven mechanisms-typically based on finite state machines (FSMs)-to control the operation of computationally intensive (data flow) parts. The state machines in turn are often fueled by external inputs as well as by feedback from the signal processing portions of the system. Packet-based transmission systems are a good example for such a close interaction between data and control flow. For an efficient design flow it is of crucial importance to be able to model and analyze the complete functionality of the system within one single design environment. Therefore, we developed a computational model that integrates the specification of control and data flow by combining the notion of data flow graphs with event driven process activation.

关键词： Signal processing data flow computing Control systems Computational modeling Automata flow graphs State feedback Protocols Joining processes Runtime

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Cellular-Automaton Profiling of Acoustic data for Feature Extraction of Turbulent flow in Occluded Carotid Arteries

Cellular-Automaton Profiling of Acoustic Data for Feature Ex...

引用

International Conference on Computer Modeling and Simulation, UKSIM

作者： Matthew Burley Gillian Pearce School of Computing and Information Technology University of Wolverhampton Wolverhampton UK School of Applied Sciences University of Wolverhampton Wolverhampton UK

ISBN: (纸本)9781424466146;9780769540160

The Greenberg-Hastings cellular automaton can be used to create feature-rich profiles of the complex waveform data caused by turbulent blood-flow in an occluded carotid artery if it is combined with recent work in differential calculus and approximation theory relating to boolean functions. We show how to undertake the derivation of a Maclaurin power series representation of the Greenberg-Hastings rule and combine this with an information theoretic approach designed to make use of ambient noise rather than treat it as a nuisance. We discuss the preliminary results of applying the technique to sound recordings taken from physical simulations of occluded carotid arteries.

关键词： Feature extraction Carotid arteries Automata Encoding data flow computing Approximation methods Acoustic imaging Microphone arrays Multiagent systems Computational modeling

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SISKIN-a graphical language for data flow computers

SISKIN-a graphical language for data flow computers

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Mediterranean Electrotechnical Conference (MELECON)

作者： N. Cizek M. Ojstersek V. Zumer Faculty of Technical Sciences University of Maribor Maribor Slovenia

The objective of the work reported was to develop a graphical interface that would be able to represent and manipulate parallel programs written in conventional high-level languages. The result of this effort was SISKIN (symbolic immediate system-to-kernel interface), which is in the form of a directed graph and serves as an intermediate level between a high-level language and a code generator for a parallel machine. The attributes of SISKIN are the ability of top-down design, modularity and stepwise refinement, so it can be used as a programming language as well.< >

关键词： data flow computing flow graphs Computer languages Parallel processing Concurrent computing Multiprocessing systems Packaging High level languages Parallel machines LAN interconnection

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A New Hierarchical Scheme for Combined Routing and flow Control in data Networks by Application of Positive System Theory

A New Hierarchical Scheme for Combined Routing and Flow Cont...

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American Control Conference (ACC)

作者： M. K. Sundareshan K. H. Muralidhar Department of Electrical and Computer Engineering University of Arizona Tucson Tucson AZ USA Communications and Network Laboratory Industrial Technology Institute Ann Arbor MI USA

In this paper we shall present some new results obtained from an application of Positive System Theory [1] to the problem of designing combined routing and flow control strategies for data communication networks. This application permits treating the combined routing and flow control problem in the framework of system stabilization and results in a hierarchical control scheme. The overall control effort consists of a distributed computation of a set of routing parameters at the lower level of network nodes and a computation on a slower time-scale of a set of combined parameters by a Supervisor (Network Control Center) at a higher hierarchical level. Specific algorithms are presented for adaptive updating of these parameters in order to realize improved network performance taking into account multiple objectives of end-to-end delay, throughput and nodal buffer management. The combined routing and flow control problem is attaining a great deal of importance in the recent times. This is due to the fact that the routing schemes and the flow control schemes implemented in existing data networks are designed independent of each other, where-as it has recently been determined [2,3] that a high degree of interplay exists between the two forms of control which has to be taken into account for realizing improved network performance. It has also been determined that a hierarchical control structure provides a very useful mechanism for an integration of routing and flow control [4,5].

关键词： Routing Control systems Telecommunication traffic Application software Computer networks Distributed computing Throughput Intelligent networks data flow computing data engineering

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Monitoring information and data flows using triggers in a dynamic workflow environment

Monitoring information and data flows using triggers in a dy...

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International Conference on Information Technology: Research and Education (ITRE)

作者： K. Ezekiel F. Marir Department of Computing Communication Technology and Mathematics London Metropolitan University London UK

Monitoring information and data flows in an organization is a difficult process. Information is often made up of several entities and quickly becomes obsolete. With current systems, monitoring and validating information is a daunting task, it involves not only implementing complex queries but also code changes, recompilations and reruns each time we add or change information. Active database systems have been created to support applications by detecting and responding to changes in databases. This includes support for specifying trigger systems to monitor changes and perform some data control tasks. However one of the problems with current trigger systems is their limited support for detecting and monitoring information and data flows in a dynamic and evolving environment. This paper addresses this limitation and a mechanism is presented in which triggers may be placed to monitor information and data flows in a dynamic workflow environment.

关键词： Monitoring Object oriented modeling database systems data flow computing Communications technology Mathematics Control systems Object oriented databases Technology management Modems

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Register allocation for data flow graphs with conditional branches and loops

引用

European Design Automation Conference

作者： C. Park T. Kim C.L. Liu Department of Computer Science University of Illinois Urbana-Champaign Urbana IL USA

A new approach to the problem of register allocation in the presence of both conditional branches and loops in a data flow graph is presented. The authors algorithm exploits the possibility of register sharing among mutually exclusive variables using a transformational approach - sets of mutually exclusive variables are transformed into an equivalent set of non-mutually exclusive variables. The transformational approach is extended to the case of data flow graphs with loops. A new register allocation algorithm is then used to produce an allocation for the non-mutually exclusive variables. From such an allocation, a corresponding allocation for the original sets of mutually exclusive variables is derived. Experimental results show that the approach is quite effective.< >

关键词： flow graphs Registers Hardware Computer science data flow computing High level synthesis Arithmetic

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Dynamic Reconfiguration of Distributed data flow Systems

Dynamic Reconfiguration of Distributed Data Flow Systems

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IEEE Annual International Computer Software and Applications Conference (COMPSAC)

作者： Zhikun Zhao Wei Li School of Computing Sciences Central Queensland University Rockhampton Australia

Although many approaches to dynamic reconfiguration have been proposed, how the impact of reconfiguration on system QoS can be controlled has not been addressed adequately so far. In this paper, we propose an approach to dynamic reconfiguration of distributed data flow systems. It is an improvement of our previous work for dynamic reconfiguration with QoS management into distributed environment. Our approach has three features. First, it uses version control, flow trace, and reconfiguration scheduling to avoid logical and physical impact on system QoS. Second, it plans a reconfiguration in a totally automatic way. Third, it executes a reconfiguration by a decentralized protocol to reduce reconfiguration time in distributed environment. We adopt our approach to the reconfiguration of a real world application, the data encryption and digital signature system. Experimental results show that our approach has significant advantages in impact control comparing with other existing approaches.

关键词： Quality of service Control systems Automatic control Protocols Communication system control Application software data flow computing Distributed computing Centralized control Environmental management

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Design space exploration for dynamically reconfigurable architectures 05

Design space exploration for dynamically reconfigurable arch...

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Design, Automation and Test in Europe Conference and Exhibition (DATE 05)

作者： Miramond, B Delosme, JM Univ Evry Val Essonne LaMI CNRS UMR 8042 Evry France

ISBN: (纸本)0769522882

By incorporating reconfigurable hardware in embedded system architectures it has become easier to satisfy the performance constraints of demanding applications while lowering system cost. In order to evaluate the performance of a candidate architecture, the nodes (tasks) of the data flow graphs that describe an application must be assigned to the computing resources of the architecture: programmable processors and reconfigurable FPGAs, whose run-time reconfiguration capabilities must be exploited. In this paper we present a novel design exploration tool-based on a local search algorithm with global convergence properties-which simultaneously explores choices for computing resources, assignments of nodes to these resources, task schedules on the programmable processors and context definitions for the reconfigurable circuits. The tool finds a solution that minimizes system cost while meeting the performance constraints;more precisely it lets the designer select the quality of the optimization (hence its computing time) and finds accordingly a solution with close-to-minimal cost.

关键词： Space exploration Reconfigurable architectures Computer architecture data flow computing Cost function Hardware Embedded system flow graphs Field programmable gate arrays Runtime

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