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Practical Efficient String Mining

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In recent years, several algorithms for mining frequent and emerging substring patterns from databases of string data (such as proteins and natural language texts) have been discovered, all of which traverse an enhanced suffix array data structure. All of these algorithms lie at either extreme of the efficiency spectrum; they are either fast and use […]

Measuring the Sky: On Computing Data Cubes via Skylining the Measures

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Data cube is a key element in supporting fast OLAP. Traditionally, an aggregate function is used to compute the values in data cubes. In this paper, we extend the notion of data cubes with a new perspective. Instead of using an aggregate function, we propose to build data cubes using the skyline operation as the […]

Outsourced Similarity Search on Metric Data Assets

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This paper considers a cloud computing setting in which similarity querying of metric data is outsourced to a service provider. The data is to be revealed only to trusted users, not to the service provider or anyone else. Users query the server for the most similar data objects to a query example. Outsourcing offers the […]

Optimizing Bloom Filter Settings in Peer-to-Peer Multikeyword Searching

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Peer-to-Peer multikeyword searching requires distributed intersection/union operations across wide area networks, raising a large amount of traffic cost. Existing schemes commonly utilize Bloom Filters (BFs) encoding to effectively reduce the traffic cost during the intersection/union operations. In this paper, we address the problem of optimizing the settings of a BF. We show, through mathematical proof, […]

On the Spectral Characterization and Scalable Mining of Network Communities

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Network communities refer to groups of vertices within which their connecting links are dense but between which they are sparse. A network community mining problem (or NCMP for short) is concerned with the problem of finding all such communities from a given network. A wide variety of applications can be formulated as NCMPs, ranging from […]

On the Deep Order-Preserving Submatrix Problem: A Best Effort Approach

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Order-preserving submatrix (OPSM) has been widely accepted as a biologically meaningful cluster model, capturing the general tendency of gene expression across a subset of experiments. In an OPSM, the expression levels of all genes induce the same linear ordering of the experiments. The OPSM problem is to discover those statistically significant OPSMs from a given […]

On the Complexity of View Update Analysis and Its Application to Annotation Propagation

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This paper investigates three problems identified in [1] for annotation propagation, namely, the view side-effect, source side-effect, and annotation placement problems. Given annotations entered for a tuple or an attribute in a view, these problems ask what tuples or attributes in the source have to be annotated to produce the view annotations. As observed in […]

On Group Nearest Group Query Processing

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Given a data point set D, a query point set Q, and an integer k, the Group Nearest Group (GNG) query finds a subset ω (|ω| ≤ k)of points from Dsuch that the total distance from all points in Q to the nearest point in ω is not greater than any other subset ω’ (|ω’| […]

Mutual Information-Based Supervised Attribute Clustering for Microarray Sample Classification

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Microarray technology is one of the important biotechnological means that allows to record the expression levels of thousands of genes simultaneously within a number of different samples. An important application of microarray gene expression data in functional genomics is to classify samples according to their gene expression profiles. Among the large amount of genes presented […]

Mining Online Reviews for Predicting Sales Performance: A Case Study in the Movie Domain

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Posting reviews online has become an increasingly popular way for people to express opinions and sentiments toward the products bought or services received. Analyzing the large volume of online reviews available would produce useful actionable knowledge that could be of economic values to vendors and other interested parties. In this paper, we conduct a case […]