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The fault diagnosis for large oil-immersed power transformer is generally carried out through preventive test data. However, the preventive test data must be obtained until power-off time, and the amounts and accuracy of the field data is limited. When a fault occurs in the running time, it always accompanies by the variations of the appearance such as color, sound, temperature and oil level, etc...
In this paper, according to the analysis of the demand system of gasoline in China, we set up and ran a dynamic simulation system of Chinese gasoline demand with Vensim, the software on dynamic system. In this system, we designed different scenes of world oil price and analyzed the changes on the demand and supply of China's gasoline, its domestic price, the growth of China's gasoline vehicles and...
Through a thorough collation and analysis of the historical data about exploration and development of Daqing oilfield, a system dynamics model of oil production in the field is established in this paper. Parameters in the model are analyzed and determined, and simulations are made to forecast the oil production, degree of reserve recovery, remaining recoverable reserves, the direct exploration investment...
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