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With the continuous expansion of the data stream applications, the data stream frequent pattern mining is becoming a hot research topic in the field of data mining, the domestic and foreign scholars put forward a large number of data stream frequent itemsets mining algorithms. This paper improves the related definitions of frequent itemsets and sliding windows, classifies sliding windows from data...
Environmental protection action is based on environmental economics theory. Facing three major scientific issues that called population, resources and environment, we will strengthen environmental economics analysis on theory. External diseconomic impact on the environment, we put the model about environmental external diseconomy; and we analysis the Environmental Property Rights; at last, we talk...
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