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The paper introduced a novel on-line fault diagnosis system model of the hydropower units based on multi-agent system. In allusion to the classical MAS-based fault diagnosis model, it proposes a new function of information interactive between the mission-controlled subsystem and the task decomposition subsystem to increase the transmission rate of control signals and designs the status-monitoring...
Although distributed object systems, including RMI and CORBA, enable object-oriented programs to be easily distributed across a network, achieving acceptable performance usually requires client-specific optimization of server interfaces, making such systems difficult to maintain and evolve. Automatic optimization techniques, including Batched Futures and Communication Restructuring, do not work as...
Lightweight fault-localization techniques use program coverage to isolate the parts of the code that are most suspicious of being faulty. In this paper, we present the results of a study of three types of program coverage-statements, branches, and data dependencies-to compare their effectiveness in localizing faults. The study shows that no single coverage type performs best for all faults-different...
This article proposes an approach for hydrological events monitoring, on a Brazilian national scale. It suggests three working environments for a complex structure where several data categories (hydrological, spatial, inventory, etc.), models (analytical and numerical) and a group of mathematical and statistical analysis tools may be use in an integrated manner. River monitoring in a national scale...
Policies form an important part of management and can be an effective means of implementing self-adaptation in pervasive systems. Most policy-based systems focus on large-scale networks and distributed systems. Consequently, they are often fragmented, dependent on infrastructure and lacking flexibility and extensibility. This paper presents Ponder2, a novel policy system that is suitable for a wide...
Microreboot is one of the most efficient self recovery technologies for mission-critical system. But some limitations still exist in the existing microreboot methods such as demand of componentization and loosing coupling etc. In order to eliminate these limitations, we propose a more flexible and usable microreboot method called mixed reboot in this paper, which systematically combines coarse-grained...
Network measurements often require the coordinated use of multiple tools on distributed vantage points. Without any form of supporting command and control system, the management and execution of a systematic measurement study is a tedious mission. In this paper we present MINER which seeks to simplify this task. MINER is a programmable measurement infrastructure that integrates existing measurement...
Grid technology opens the way to build collaborative environments that enable distributed multi-organizational teams to jointly use computing resources. Thus automatic resources/services discovery should be launched with the dynamicity of grid elements. Hardware and software failure can be found and solved in time by monitoring. Analyzing the gathered data could help to find performance bottleneck...
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