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3rd international Enterprise distributed Object computing conference, EDOC 1999

作者： Halliday, J.J. Shrivastava, S.K. Wheater, S.M. Department of Computing Science Newcastle University Newcastle Upon Tyne NE1 7RU United Kingdom

ISBN: (纸本)0780357841

There is growing interest in providing computer support for an organisation's business processes such as customer order processing, product support, stock taking and so forth. Workflow systems are normally used for this purpose to co-ordinate and monitor execution of multiple tasks arranged to form business processes. In this context, computer support for work activity co-ordination will be taken to mean tools and services made available to the employees of an organisation to enable them to carry out their tasks that form the part of these workflows. The paper illustrates how a transactional workflow system can be augmented with support for reliable management of worklists in an arbitrarily distributed environment. Ideally, the workflow enactment service should be neutral to the types of work activity coordination services to be made available to users. In this way, the needs of a wide variety of organisations can be supported by building organisation specific services. The approach taken here is to separate organisational aspects of workflow management from the workflow enactment service as much as possible. © 1999 ieee.

关键词： Workflow management

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Using mobile agents to improve the alignment between manufacturing and its IT support systems

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ROBOTICS AND AUTONOMOUS systems 1999年第1-2期27卷 45-57页

作者： Papaioannou, T Edwards, J Loughborough Univ Technol Dept Mfg Engn Loughborough LE11 3TU Leics England

This paper proposes the notion that mobile agent technology can improve the alignment between IT systems and the real world processes they support. This can aid enterprise agility, particularly where distributed information is a feature, as in the virtual enterprise. A model of the manufacturing sales/order process is proposed. The sales order is shown to be a naturally mobile element of the model. The subsequent decomposition of the agent types during detailed design and implementation reveals an abstract pattern for database query using agent technology. Finally, an overview of the security issues associated with mobile agents is discussed. (C) 1999 Elsevier Science B.V. All rights reserved.

关键词： mobile agents virtual enterprise system integration agile systems mobile agent security

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Proceedings - ieee international Enterprise distributed Object computing Workshop, EDOCW

Proceedings - IEEE International Enterprise Distributed Obje...

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3rd international Enterprise distributed Object computing conference, EDOC 1999

The proceedings contain 27 papers. The topics discussed include: reflection support for adaptive distributed applications;formalising ODP enterprise policies;options for expressing ODP enterprise communities and their policies by using UML;patterns for integrating manufacturing product and process models;using the UML language to express the ODP enterprise concepts;CEIF: a CORBA-based integrated framework for manufacturing enterprises;OMF - an object request broker for the process control application domain;dynamic management of internet telephony servers: a case study based on JavaBeans and JDMK;implementing support for work activity coordination within a distributed workflow system;an ODP enterprise specification of customer service management for connectivity services;the EVOLVE tailoring platform: supporting the evolution of component-based groupware;naming and locating mobile agents in an internet environment;and ODP-modelling of virtual enterprises with supporting engineering architecture.

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Logical calculi of rough-set granules in problems of approximate synthesis in distributed systems 3

Logical calculi of rough-set granules in problems of approxi...

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3rd international conference on Computational Intelligence and Multimedia Applications, ICCIMA 1999

作者： Polkowski, Lech Skowron, Andrzej Polish-Japanese Institute of Information Technology Koszykowa 86 Warsaw02008 Poland Institute of Mathematics Warsaw Univ. Technology Poland Institute of Mathematics Warsaw University Banacha 2 Warsaw02097 Poland

ISBN: (纸本)0769503004

A logical calculus of granules is presented. This calculus provides a framework for the approximate synthesis of solutions under uncertainty by distributed systems. The presented calculus is based on rough mereology, a paradigm for approximate reasoning developed by the authors which blends together and relies on the mereology ideas of St. Lesniewski (see L. Polkowski and A. Skowron, Intell. Automation and Soft Computer, vol. 2, no. 2, 1996), rough set theory and fuzzy set theory. © 1999 ieee.

关键词： Fuzzy set theory

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sensor with regulated space coherence of light

Sensor with regulated space coherence of light

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3rd international conference on Optical Information Processing

作者： Markilov, AA Rodin, VG Saliy, NN Starikov, SN Moscow Engn Phys Inst Dept Solid State Phys Moscow 115409 Russia

ISBN: (纸本)0819435058

In optical information processing systems with partial and even completely of destroyed space coherence radiation, the technique of transformation of space coherence degree appears rather effective for want of creation reliable devices, capable to work in real time scale. It is represented perspective for want of to development of functional of optical information processing systems, including stages of pick up, transfer, storage, imaging to use as a main principle of construction a light field creation method with specific coherent properties. The outcomes of researches of possibility of optical sensor are resulted, in which as a disturbance value criterion the qualitative transition from speckle structure to creation stable, beforehand planned, light field is accepted. The possibility of the sensor because of quantitative measurements of coherent properties of radiation in correlation with changes in geometrical parameters of the system is considered. The optical system is created which can be considered as the fibre-optical sensor of mechanical disturbances of a vibrational type. The adjustable sensitivity of registration is achieved when the redistribution of a destruction level of light space coherence in an input of the system and a site of transfer of light signal. Is shown, that relative accuracy are 10(-3). The developed approach to creation of measuring systems based on transformation, visualization and measurement of light space coherence changed in the communication line with natural or artificially created nonstability can find application for want of construction of location optical. systems, altimeters working in actual conditions, and also for measurement sistem for oscillating disperse surfaces.

关键词： space coherence degree fibre-optical sensor

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Monocular vision-based position sensor using neural networks for automated vehicle following

Monocular vision-based position sensor using neural networks...

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Proceedings of the 1999 3rd ieee international conference on Power Electronics and Drive systems (PEDS'99)

作者： Omura, Yasushi Funabiki, Shigeyuki Tanaka, Toshihiko Niihama Natl Coll of Technology Ehime Japan

This paper presents a new position sensor with a CCD camera based on neural networks that measures the distance and direction angle to and the pose angle of the lead vehicle in automated vehicle following. A picture image of lamps mounted on the lead vehicle is obtained with the CCD camera. Lamp positions are established in a rectangular coordinate system by means of graphic data processing. The measuring process of the proposed position sensor is developed by neural network learning with backpropagation. The number of lamps can be reduced four to three without sacrificing sensor accuracy. This reduction in the number of lamps shortens acquisition time in graphic data processing. Experimental results show that the distance, direction angle and pose angle are sufficiency accurate for practical use in automated vehicle following.

关键词： Image sensors

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A development environment for complex distributed real-time applications

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ieee TRANSACTIONS ON SOFTWARE ENGINEERING 1999年第1期25卷 50-74页

作者： Stoyen, AD Marlowe, TJ Younis, MF Petrov, PV Univ Nebraska Coll Informat Sci & Technol Dept Comp Sci Omaha NE 68182 USA Seton Hall Univ Dept Math & Comp Sci S Orange NJ 07079 USA Allied Signal Inc Adv Syst Technol Grp Columbia MD 21045 USA New Jersey Inst Technol Dept Comp & Informat Sci Dependable Real Time Syst Lab Newark NJ 07102 USA

Engineering of complex distributed real-time applications is one of the hardest tasks faced by the software profession today. All aspects of the process, from design to implementation, are made more difficult by the interaction of behavioral and platform constraints. Providing tools for this task is likewise not without major challenges. In this paper, we discuss a tool suite which supports the development of complex distributed real-time applications in a suitable high-level language (CRL). The suite's component tools include a compiler, a transformer-optimizer, an allocator-migrator, a schedulability analyzer, a debugger-monitor, a kernel, and a (simulated) network manager. The overall engineering approach supported by the suite is to provide as simple and natural an integrated development paradigm as possible. The suite tools address complexity due to distribution, scheduling, allocation and other sources in an integrated manner (largely) transparent to the developer. To reflect the needs of propagation of functional and nonfunctional requirements throughout the development process, a number of robust code transformation and communication mechanisms have been incorporated into the suite. To facilitate practical use of the suite, the developed programs compile-transform to a safe subset of C++ with appropriate libraries and runtime support. (In this safe subset (C++) the use of pointers is minimized. Aliases are not allowed. Unconstrained storage and time allocation is not allowed, and constructions which lead to arbitrarily long executions or delays (due to time or other resource allocation use) are not permitted. Other safe features include strong typing (including constrained variants) only, no side-effects in expressions or functions, etc.).

关键词： engineering of complex distributed real-time systems integrated tool suites user-transparent handling of complexity CRL C++ compilation allocation debugging monitoring runtime kernels code transformers and optimizers schedulability analyzers

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Novel single current sensor technique suitable for BLDCM drives

Novel single current sensor technique suitable for BLDCM dri...

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Proceedings of the 1999 3rd ieee international conference on Power Electronics and Drive systems (PEDS'99)

作者： Tan, H. Ho, S.L. Hong Kong Poly. Univ Hong Kong

The torque output in a permanent magnet brushless DC motor (BLDCM) is usually controlled by regulating the motor phase currents. In this paper, three kinds of PWM strategies together with some critical review on traditional current measurements in a BLDCM drive system are discussed. A novel method for assessing the PWM information and measuring the motor phase currents by a dc link current sensor is also proposed. The attractive feature of this method is the simplicity with the current sample processing because there is no need to incorporate the conduction information of the power switches or diodes. Only the single sided PWM or the double sided complementary PWM is needed with the proposed technique.

关键词： Electric current measurement

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Active three-phase rectifier with only one current sensor in the dc-link

Active three-phase rectifier with only one current sensor in...

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Proceedings of the 1999 3rd ieee international conference on Power Electronics and Drive systems (PEDS'99)

作者： Andersen, B. Holmgaard, T. Nielsen, J.G. Blaabjerg, F. Vestas Wind Systems A/S Lem Denmark

Three-phase active rectifiers with six transistors are expected to be used in many future power electronic applications especially because of their clean power load of the grid. This topology is expensive and cost-reduction is an important issue. This paper proposes a three phase active rectifier topology, where the number of current sensors are reduced from three to one and still the same performance is kept in respect to control bandwidth and protection. Instead of using three current sensors to the grid, one current sensor is put into the dc-link. Difficulties in respect to using one current sensor are discussed and solved. The topology is implemented in the laboratory and test results show the same results when comparing the performance using one or three current sensors. It can be concluded the topology can be used in future three-phase active rectifiers.

关键词： Electric rectifiers

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3rd Workshop on Communication, Architecture and Applications for Network-based Parallel computing, CANPC 1999

3rd Workshop on Communication, Architecture and Applications...

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3rd international Workshop on Communication, Architecture and Applications for Network-based Parallel computing , CANPC 1999

ISBN: (纸本)3540659153

The proceedings contain 15 papers. The special focus in this conference is on Network-Based Parallel computing. The topics include: A parallel implementation of the everglades landscape fire model in networks of workstations;adaptation models for network-aware distributed computations;prototyping execution models for HTMT petaflop machine in java;is it worth the flexibility provided by irregular topologies in networks of workstations;performance evaluation of the multimedia router with MPEG-2 video traffic;a scalable flow control algorithm for the fast messages communication library;high performance sockets and RPC over virtual interface VI architecture;the scheduled transfer ST protocol;the NIP parallel object-oriented computational model;support for scalable distributed shared objects;combining adaptive and deterministic routing;deadlock-free routing in irregular networks with dynamic reconfiguration;implementing application-specific cache-coherence protocols in configurable hardware;supporting shared memory and message passing on clusters of PCs with a SMiLE and low latency message-passing for reflective memory networks.

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