computingmodel of nodes has an important effect on the network performance and the mobile agent computingmodel for the next generation network has attracted more and more attentions. The background of mobile agent a...
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ISBN:
(纸本)9781424413119
computingmodel of nodes has an important effect on the network performance and the mobile agent computingmodel for the next generation network has attracted more and more attentions. The background of mobile agent applied In the wireless sensor network is first analyzed. Then a framework based on mobile agent is proposed from two levels, namely network and nodes. After introducing the basic elements, functional definitions and interfaces of the framework, an implementation mechanism based on directed diffusion for mobile agent is presented in detail.
The capability of dynamically adapting to distinct run-time conditions is an important issue when designing distributed systems where negotiated quality of service (QoS) cannot always be delivered between processes., ...
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ISBN:
(纸本)0769522823
The capability of dynamically adapting to distinct run-time conditions is an important issue when designing distributed systems where negotiated quality of service (QoS) cannot always be delivered between processes., Providing fault-tolerance for such dynamic environments is a challenging task. Considering such a context, this, paper proposes an adaptive model for fault-tolerant distributedcomputing. This model encompasses both the synchronous model (where there are time bounds on processing speed and message delay) and the asynchronous model (where there is no time bound). To illustrate what can be done in this model and how to use it, the consensus problem is taken as a benchmark problem. An implementation of the model is also described This implementation relies on a negotiated quality of service (QoS) for channels, that can be timely or untimely. Moreover, the QoS of a channel can be lost during the execution (i.e., dynamically modified from timely to untimely), thereby adding uncertainty into the system.
In this paper;we presented our work in progress on comporting infrastructure of HMNI (Human-Machine Natural Interaction) research project. In multimodal speech recognition system, various signals and huge amount of da...
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ISBN:
(纸本)9628576623
In this paper;we presented our work in progress on comporting infrastructure of HMNI (Human-Machine Natural Interaction) research project. In multimodal speech recognition system, various signals and huge amount of data are collected and analyzed simultaneously. To make this hind of task realizable, we developed a practical distributed computing model complying with CORBA (Common Object Request Broker Architecture).
This paper presents a Java-based distributed computing model for deploying networking system. The proposed model can rais e the level of abstraction for network or distributed system programming, from network protocol...
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ISBN:
(纸本)0769513816
This paper presents a Java-based distributed computing model for deploying networking system. The proposed model can rais e the level of abstraction for network or distributed system programming, from network protocol level to the object interface level, it provides a mechanism to enable smooth adding, removal, and finding of software components and services on the network. The software components providers use this distributedmodel to advertise complex descriptions of available or already running services, while clients use the model to compose complex queries for locating these software components. The provider of software components or services needs not agree on network level protocols that allow their software components to interact. In this paper, the framework of the proposed model is described, and the processes for implementing the model are given, which can consists of three processes. The availability and efficiency of the model have been verified by illustrating an example. Finally, some remarks and conclusions are given.
The software architecture of a system has influences against various software characteristics of the system such as efficiency, reliability, maintainability, etc. For supporting to design the software architecture, we...
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The software architecture of a system has influences against various software characteristics of the system such as efficiency, reliability, maintainability, etc. For supporting to design the software architecture, we have developed architectural styles for distributed processing systems. The styles classify the architecture for distributed processing systems into nine categories based on the location of data storage and the type of processing between a client and a server. This paper describes our architectural styles and proposes a simple but practical method to select an appropriate architectural style for developing an application system. The selection method introduces the characterization of architectural styles and the characteristic charts to visualize their characteristics of architectural styles. Next, we propose a method to select an appropriate architectural style using the conformity between characteristic charts of a system and architectural styles. We have verified the applicability of this selection method using our customers' real application systems. (C) 2002 Elsevier Science B.V. All rights reserved.
作者：
Yoshitomi MorisawaKoji ToriiNihon Unisys
Ltd. 1-1-1 Toyosu Koto-ku Tokyo 135-8560 Japan and Graduate School of Information Science Nara Institute of Science and Technology 8916-5 Takayama Ikoma-shi nara 630-0101 Janan Graduate School of Information Science
Nara Institute of Science and Technology 8916-5 Takayama Ikoma-shi nara 630-0101 Janan
When implementing an application system in a distributedcomputing environment, several architectural questions arise, such as how and where computing resources are arranged, and how the communication among computing ...
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ISBN:
(纸本)9781581133905
When implementing an application system in a distributedcomputing environment, several architectural questions arise, such as how and where computing resources are arranged, and how the communication among computing resources are implemented. To simplify the process of making these choices, we have developed an architectural style for distributed processing system. The style classifies product lines for distributed processing systems into nine categories based on the location of data storage and the style of processing between client and server. This paper describes our architectural style and proposes a simple but practical method to select an appropriate architectural style for developing an application system. We apply this selection method in concrete real application systems.
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