| In the process of the construction of electric power industry informational ,there are a great deal of historical data which cry for decision support system using technology of data mining,and it would be used to resolve the pivotal ,extrusive question .This paper bases on the need of electric power marketing decision support system ,discuss some kinds of arithmetic .and choose the proper arithmetic .Design and realize some of the difficult data structure and arithmetic and apply them into our electric power marketing decision support system on Qingdao.
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