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As an indispensable component of the ship, marine shafting system transmits power generated by the main engine to the propeller, and at the same time transmits propeller thrust to the hull, and therefore drives the ship ahead. Torsional vibration does lots harm to ship shaft system, brings a serious threat to the safe navigation of the ship. The method of power flow considers the amplitude and phase...
We propose a two-tiered hierarchical approach for detecting faults in embedded control software during their runtime operation: The observed behavior is monitored against the appropriate specifications at two different levels, namely, the software level and the controlled-system level. (The additional controlled- system level monitoring safeguards against any possible incompleteness at the software...
The problem of decentralized modular fault diagnosis of concurrent discrete event systems, that is composed of a set of component modules, is formulated and studied. In the proposed decentralized modular framework, diagnosis is performed by the local diagnosers, located at the component sites, using their own local observations. This is to ensure the scalability of the approach with respect to the...
In this paper, we present a two-pass approach for digital circuit fault diagnosis. By using the two-pass diagnosis method we can significantly improve the logic fault diagnostic resolution while keeping the test cost manageable. We performed fault diagnostic simulations on dozens of ISCAS89, ITC99, and other benchmark circuits and we are able to narrow down the list of likely faults to a single fault...
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