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The explosive growth of user-generated contents in social networking websites necessitates the recommendation functionality that can push to the user the content that he/she is most likely to be interested in. Such recommendation should happen in real-time as new contents become available, because "freshness" is an important consideration in people's content-consumption behavior. Representing...
We study the problem of efficient processing of kNN joins over high-dimensional data streams, which is an operation required by many big data applications. Specifically, we are concerned with the continuous evaluation of a set of k nearest neighbor queries Q on streams of high-dimensional items at consecutive snapshots of those streams. While one possible solution is to evaluate the kNN joins starting...
According to the monitoring and analysis of chloroform in the water distribution network in a northern city of China, the variations of chloroform in the water distribution network and the major influence factors were studied. Using principle component analysis method, the prediction model which including 9 water quality indexes was established to predict the concentration of chloroform and the average...
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