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Time series is an important tool for data representation and knowledge mining. In order to better describe the status and trends of the data sequence at different times, the time-varying cloud model is proposed based on cloud model to uncover its development change rule. It uses the concept set for qualitative description of time series, and obtains the corresponding higher-level cognitive concept...
There are two major challenges to the personalized recommendation method, one is the sparseness of characteristic attribute, the other is the excessive reliance on scoring data. To solve above problems, a personalized recommendation algorithm (PRM-Grey) based on grey theory is presented. Firstly, the nearest neighbor matrix formed through the similarity between the characteristic matrix rows. Then,...
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