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With the database technology, artificial intelligence and mathematical statistics the development of technology, database data mining technology arises at the historic moment. This paper presented related formal definitions of association rules and the basic algorithm for association rules mining in data streams. Based on systematic investigation of association rules mining researches on streams data,...
In order to realize informational management of petroleum enterprise and improve the comprehensive competivity, the visual decision support system is given in this paper. Firstly, the background and significance of building the visual decision support system of petroleum enterprise is analysized, and also the merging point of the visual decision support system of petroleum enterprise with GIS, ES,...
In order to analyze the effect of typical public events on the urban traffic behaviors, this paper firstly studied the factors of traffic mode choice and their interaction at macroscopic and microcosmic angles. Then according to the traffic characteristic and scope of public events, a disaggregate model of traffic mode choice was set up. Finally, the model was applied in the case of split ratio forecast...
In the process of multiple-object optimum design of the round angle on the filleted corner of the universal mill’s frame, the proximity degree between the optimal solution with different weight number and the perfect solution was calculated based on the membership function of the fuzzy mathematics firstly, and a logical weight number group can be determined, then the rigidity object and weight object...
Inter-Carriers Interference (ICI) caused by frequency offset can result in the performance loss of the OFDM system. Aiming at this problem, the method of All Phase FFT is proposed for reducing the ICI and estimating frequency offset (CFO). Since the ICI energy and signal energy both contribute coherently to the estimator, the algorithm generates extremely accurate estimates even when the offset is...
The Fresnel lens optical landing system (FLOLS) is the electro-optical pilot longitudinal landing aid for the carrier. The guiding principle and the stabilization theory of the FLOLS are analyzed here. The line stabilization strategy is analyzed, in order to build the line stabilization model, the transformation problem of the carrier rotational motion between different coordinate systems is solved,...
To determination organic compounds in landfill leachates,the landfill leachates were extracted with a PT-C18 column and the extraction liquid were analyzed with a gas chromatograph coupled to an mass-selective detector(GC-MS). The results showed that total 162 kinds organic compounds been determinted out. One of them , there are 22 kinds of Chinese priority pollutants and 32 kinds united states environmental...
A novel method of rule extraction from artificial neural network with optimized activation function is proposed. Weight-decay approach is used in training and the unnecessary connections in the neural network are pruned at the cost of an increase in the error function within a predetermined limit. A penalty term is added in the activation function to facilitate the values of hidden and output nodes...
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