Ultrasonic flowmeters have potential for wide application in natural gas and hydrogen flow measurements in China. Accurate measurement is essential;thus, data fusion of acoustic paths is of importance. A data integrat...
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Ultrasonic flowmeters have potential for wide application in natural gas and hydrogen flow measurements in China. Accurate measurement is essential;thus, data fusion of acoustic paths is of importance. A data integration method for multi-path flowmeter measurement is introduced and investigated in this study. The novel data integration method is based on the Levenberg-Marquardt algorithm. Computational fluid dynamics has been used to simulate the flows, and a laboratory scale system was established to obtain experimental measurements. The results of the simulations and experiments reveal that the method is able to reduce measurement error compared with four traditional integrationmethods in flow-rate measuring in a long straight pipe. Furthermore, both the simulation and experiment results validate the integrationmethod for non-ideal flow conditions, such as flow downstream a single elbow or a 180 degrees bend. The relative errors are within 1%, instead of more than 2%, which is typical for traditional methods.
Web Mining is an important sub-branch of data Mining. The data Mining technology normally adopts data integration method to generate data warehouse, on which to dig the Relation Rules, Cluster Characters and get the u...
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ISBN:
(纸本)0769519571
Web Mining is an important sub-branch of data Mining. The data Mining technology normally adopts data integration method to generate data warehouse, on which to dig the Relation Rules, Cluster Characters and get the useful Module Prediction and knowledge evaluation. For Web data's semi-structure and heterogeneous (mixed media) character, The Web Mining technology is different to the pure mining based on database. In this paper we introduce a Multi-Agent cooperation module, which play as Knowledge Crawler, Exaction Machine, Generalization Machine and Analysis Machine. Through the communication between Multi-Agent system and Agent Naming Server, these agents acquire useful Knowledge..
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