865 resultados para Discrete-time systems
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The research work presented in the thesis describes a new methodology for the automated near real-time detection of pipe bursts in Water Distribution Systems (WDSs). The methodology analyses the pressure/flow data gathered by means of SCADA systems in order to extract useful informations that go beyond the simple and usual monitoring type activities and/or regulatory reporting , enabling the water company to proactively manage the WDSs sections. The work has an interdisciplinary nature covering AI techniques and WDSs management processes such as data collection, manipulation and analysis for event detection. Indeed, the methodology makes use of (i) Artificial Neural Network (ANN) for the short-term forecasting of future pressure/flow signal values and (ii) Rule-based Model for bursts detection at sensor and district level. The results of applying the new methodology to a District Metered Area in Emilia- Romagna’s region, Italy have also been reported in the thesis. The results gathered illustrate how the methodology is capable to detect the aforementioned failure events in fast and reliable manner. The methodology guarantees the water companies to save water, energy, money and therefore enhance them to achieve higher levels of operational efficiency, a compliance with the current regulations and, last but not least, an improvement of customer service.
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National Highway Traffic Safety Administration, Washington, D.C.
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Transportation Department, Washington, D.C.
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Federal Highway Administration, Office of Research, Washington, D.C.
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Federal Highway Administration, Office of Research, Washington, D.C.
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Federal Highway Administration, Office of Research, Washington, D.C.
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Vita.
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Includes bibliographies (p. 27-29).
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Vita.
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"SFOSR 748."
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Mode of access: Internet.
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"Materials Laboratory, Contract no. AF 33(616)-5449. Project no. 7360."
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Halkett and Laing, following a passing reference to this work in Notes and queries, March 12, 1852, p. 259, ascribe the authorship to "Mrs. Flannigan". and they are followed by Cushing. V. L. Oliver, however, in his History of the island of Antigua, London, 1894-99, v. 1, p. iv. attributes the work to "Mrs. Lanaghan".
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Mode of access: Internet.