Efficient distributed processing is vital for collaborative searching tasks of robotic swarm systems. Typically, those systems are decentralized, and the members have only limited communication and processing capaciti...
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Efficient distributed processing is vital for collaborative searching tasks of robotic swarm systems. Typically, those systems are decentralized, and the members have only limited communication and processing capacities. What is illustrated in this paper is a distributed processing paradigm for robotic swarms moving in a line or v-shape formation. The introduced concept is capable of exploits the line and v-shape formations for 2-D filtering and processing algorithms based on a modified multi-dimensional Roesser model. The communication is only between nearest adjacent members with a simple state variable. As an example, we applied a salient region detection algorithm to the proposed framework. The simulation results indicate the designed paradigm can detect salient regions by using a moving line or v-shape formation in a scanning way. The requirement of communication and processing capability in this framework is minimal, making it a good candidate for collaborative exploration of formatted robotic swarms.
J. Aguado and V. Quintana comment on the paper by R. Ebrahimian and R. Baldick (see ibid., vol.15, no.4, p.1240-6, 2000), and ask for comments on five points relating to their own work in this area of power network st...
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J. Aguado and V. Quintana comment on the paper by R. Ebrahimian and R. Baldick (see ibid., vol.15, no.4, p.1240-6, 2000), and ask for comments on five points relating to their own work in this area of power network state estimation. The original authors reply to the comments.
This paper considers an advanced intelligent network (IN) service control node, which combines function distribution and load distribution, where processing performance can be expanded by adding processor modules when...
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This paper considers an advanced intelligent network (IN) service control node, which combines function distribution and load distribution, where processing performance can be expanded by adding processor modules when the load is increased. A highly reliable configuration for the connection mechanism, in which a large number of processor modules are connected by ATM, a control scheme that improves the communication processing performance of each processor module, and a performance evaluation procedure are presented. As to the ATM connection mechanism, a configuration is presented in which the reliability is not much reduced even if a large-scale system is constructed. In the proposed configuration, the function of connecting processor modules, the function of multiplex/demulitplexing signals, and the function of cell routing are realized by separate hardware, and double redundancy is applied to each function. For improvement of the communication processing performance of the processor module, a control scheme is considered in which the messages are grouped and processed for each time unit. The relation between the response time and the throughput is analyzed. A performance evaluation program is presented, which examines the time required for sending/receiving messages between the constructed processor modules. (C) 1999 Scripta Technica.
For middle-speed and four-stroke marine diesel engine, a new Main Engine Remote Control System based on distributed processing and dual-redundant CAN network communication technology was presented. It includes engine ...
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For middle-speed and four-stroke marine diesel engine, a new Main Engine Remote Control System based on distributed processing and dual-redundant CAN network communication technology was presented. It includes engine control unit, indicating panel unit, engine safety unit, main engine interface, digital governor unit and distributed processing unit. System data can be exchanged by dual-redundant CAN network. The distributed processing unit is independent in physics completely, so it has less impact on other units when some units malfunctioned. The communication of system units is designed by open communication protocol of CAN, it can self-test and troubleshoot. The System has function of self-insurance when loss power, and can delay shut-down when loss of air. Its operating mode and man-machine interface are convenient and friendly.
A one dimensional (1D) and a two dimensional (2D) Kalman filters as means of distributed processing are developed for two single input multiple output (SIMO) AWGN channels, i.e., one without and the other with inter s...
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A one dimensional (1D) and a two dimensional (2D) Kalman filters as means of distributed processing are developed for two single input multiple output (SIMO) AWGN channels, i.e., one without and the other with inter symbol interference (ISI), respectively. We show the capacity of the distributed and centrally processed channels to be the same for channels with and without ISI.
Basic message processing tasks, such as well-formedness checking and grammar validation, common in Web service messaging, can be off-loaded from the service providers' own infrastructures. The traditional ways to ...
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Basic message processing tasks, such as well-formedness checking and grammar validation, common in Web service messaging, can be off-loaded from the service providers' own infrastructures. The traditional ways to alleviate the overhead caused by these tasks is to use firewalls and gateways. However, these single processing point solutions do not scale well. To enable effective off-loading of common processing tasks, we introduce the Prefix Automata SyStem - PASS, a middleware architecture which distributively processes XML payloads of web service SOAP messages during their routing towards Web servers. PASS is based on a network of automata, where PASS-nodes independently but cooperatively process parts of the SOAP message XML payload. PASS allows autonomous and pipelined in-network processing of XML documents, where parts of a large message payload are processed by various PASS-nodes in tandem or simultaneously. The non-blocking, non-wasteful, and autonomous operation of PASS middleware is achieved by relying on the prefix nature of basic XML processing tasks, such as well-formedness checking and DTD validation. These properties ensure minimal distributed processing management overhead. We present necessary and sufficient conditions for outsourcing XML document processing tasks to PASS, as well as provide guidelines for rendering suitable applications to be PASS processable. We demonstrate the advantages of migrating XML document processing, such as well-formedness checking, DTD parsing, and filtering to the network via event driven simulations. (C) 2008 Elsevier Ltd. All rights reserved.
Event building is an important task for data acquisition (DAQ) systems in high-energy physics experiments. D-Matrix is designed as a generic distributed stream processing DAQ platform, containing hardware description ...
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Event building is an important task for data acquisition (DAQ) systems in high-energy physics experiments. D-Matrix is designed as a generic distributed stream processing DAQ platform, containing hardware description language (HDL)-based modules and software modules. In the D-Matrix system, the data transfer is abstracted into the form of a stream, and the event building is implemented through a cascade of various reusable stream processing modules. These stream processing modules will determine their work modes automatically based on a set of attributes, which describe the abstracted data stream characteristics, such as spatiotemporal organization and granularity. This article introduces the event building architecture, the physics data structure abstraction, and the algorithmic implementation of specific event building modules in the D-Matrix system. An application of the D-Matrix event building architecture in the CSR external-target experiment is presented in the end.
The authors describe an i860 based prototype add-on card as a computer server in a distributed system. Preliminary scalar oriented performance indicates that the card is about 35% (200%) faster than SUN SPARC station ...
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The authors describe an i860 based prototype add-on card as a computer server in a distributed system. Preliminary scalar oriented performance indicates that the card is about 35% (200%) faster than SUN SPARC station 1 rated at 1.7 MFLOPS (15.8 MIPS) running at 25 MHz. The most notable feature of the system is that it provides a run-time environment which is similar to running the Turbo C program under a DOS session. This feature increases portability and reduces the inertia for application porting. A low-cost high-performance networked server using i860 is being implemented. In this system, only one or two i860 cards are connected to a PC network of about 10 to 20 PC/ATs. The computer code of the Turbo-C program will run on the i860 server via an Ethernet network and the I/O code will be executed on the local PC/AT node. For the example of a 70*70 matrix floating point multiplication program, it is found that the system is about 55 times faster than executing the program on the local 12 MHz 286/10 MHz 287 AT node.< >
New technologies such as the IP multimedia subsystem (IMS) provide components to support enhanced audio conferencing services, requiring media distribution models designed for traditional monophonic VoIP audio confere...
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New technologies such as the IP multimedia subsystem (IMS) provide components to support enhanced audio conferencing services, requiring media distribution models designed for traditional monophonic VoIP audio conferences to be revised and extended. We propose a new media distribution model, for headphone based spatialized audio conferences where spatial cues are provided by head related transfer function (HRTF) filtering. Under our proposal, the HRTF filtering and mixing processes may be partially distributed across conferees terminals and a dedicated audio processing server. This results in a high level of spatial manipulation per terminal, whilst server processing load is minimized. We also provide analysis of two network load reduction techniques for our model; application layer routing (ALR) and optimized mix selection (OMS), demonstrating significant load reduction when using ALR for conferences ranging in both size, and terminal processing capabilities.
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