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• W2125999281 abstract "How can we maintain a dynamic profile capturing a user’s reading interest against the common interest? What are the queries that have been asked 1,000 times more frequently to a search engine from users in Asia than in North America? What are the keywords (or tags) that are 1,000 times more frequent in the blog stream on computer games than in the blog stream on Hollywood movies? To answer such interesting questions, we need to find discriminative items in multiple data streams. Each data source, such as Web search queries in a region and blog postings on a topic, can be modeled as a data stream due to the fast growing volume of the source. Motivated by the extensive applications, in this paper, we study the problem of mining discriminative items in multiple data streams. We show that, to exactly find all discriminative items in stream S 1 against stream S 2 by one scan, the space lower bound is $Omega(|Sigma| log frac{n_1}{|Sigma|})$ , where Σ is the alphabet of items and n 1 is the current size of S 1. To tackle the space challenge, we develop three heuristic algorithms that can achieve high precision and recall using sub-linear space and sub-linear processing time per item with respect to |Σ|. The complexity of all algorithms are independent to the size of the two streams. An extensive empirical study using both real data sets and synthetic data sets verifies our design." @default.
• W2125999281 created "2016-06-24" @default.
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• W2125999281 date "2010-07-10" @default.
• W2125999281 modified "2023-09-22" @default.
• W2125999281 title "Mining discriminative items in multiple data streams" @default.
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• W2125999281 doi "https://doi.org/10.1007/s11280-010-0094-0" @default.
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