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Skyline queries, front and back
ACM SIGMOD Record, 2013Skyline queries are a popular way to obtain preferred answers from the database by providing only the orderings of attribute values. The result of a skyline query consists of those input tuples for which there is no input tuple having better or equal values in all the attributes and a better value in at least one attribute.
Jan Chomicki +2 more
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Datenbank-Spektrum, 2016
Many applications face the problem that users are overwhelmed by the large amount of available data. In some cases an objective ranking function can be used to order data items by their relevance – similar to the top 10 results displayed by a Web search engine.
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Many applications face the problem that users are overwhelmed by the large amount of available data. In some cases an objective ranking function can be used to order data items by their relevance – similar to the top 10 results displayed by a Web search engine.
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2012
Continuous monitoring of queries over moving objects has become an important topic as it supports a wide range of useful mobile applications. A continuous skyline query involves both static and dynamic dimensions. In the dynamic dimension, the data object not only has a distance from the query object, but it also has a direction with respect to the ...
Eman El-Dawy +2 more
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Continuous monitoring of queries over moving objects has become an important topic as it supports a wide range of useful mobile applications. A continuous skyline query involves both static and dynamic dimensions. In the dynamic dimension, the data object not only has a distance from the query object, but it also has a direction with respect to the ...
Eman El-Dawy +2 more
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Maintenance of Range Skyline Query
2020 IEEE International Conference on Knowledge Graph (ICKG), 2020Skyline query has attracted much attention from the data management community. It is widely used in many practical applications, such as multi-criteria decision-making, product recommendations, and decision analysis. The range skyline query retrieves skyline results for each query point in the specified range, which means that users can set their ideal
Xiaoxue Li +3 more
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Skyline and reverse skyline query processing in SpatialHadoop
Data & Knowledge Engineering, 2019Abstract In this paper, we study the problem of skyline and reverse skyline computation using SpatialHadoop, an extension of Hadoop that enhances its capabilities with spatial awareness. The exploitation of spatial indexing structures and the spatial properties of data can exploit MapReduce-based methods by reducing the reading, writing ...
Christos Kalyvas, Manolis Maragoudakis
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Proceedings of the 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, 2014
Given a set S of sites and a set O of objects in a metric space, the Optimal Location (OL) problem is about computing a location in the space where introducing a new site (e.g., a retail store) maximizes the number of the objects (e.g., customers) that would choose the new site as their "preferred" site among all sites.
Farnoush Banaei Kashani +2 more
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Given a set S of sites and a set O of objects in a metric space, the Optimal Location (OL) problem is about computing a location in the space where introducing a new site (e.g., a retail store) maximizes the number of the objects (e.g., customers) that would choose the new site as their "preferred" site among all sites.
Farnoush Banaei Kashani +2 more
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Exception-Tolerant Skyline Queries
2014This paper presents an approach aimed at reducing the impact of exceptional points/outliers when computing skyline queries. The phenomenon that one wants to avoid is that noisy or suspect elements “hide” some more interesting answers just because they dominate them in the sense of Pareto.
Jaudoin, Hélène +2 more
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Location-Dependent Skyline Query
The Ninth International Conference on Mobile Data Management (mdm 2008), 2008Given a set of data points with both spatial coordinates and non-spatial attributes, point a location-dependently dominates point b with respect to a query point q if a is closer to q than b and meanwhile a dominates b. A location- dependent skyline query (LDSQ) issued at point q is to retrieve all the points that are not location-dependently dominated
Baihua Zheng +2 more
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The σ-neighborhood skyline queries
Information Sciences, 2015Skyline queries have recently attracted considerable attention for their ability to return data points from a given dataset that are not dominated by any other points. This study extends the concept of skyline queries in the development of a ?-neighborhood skyline query (?-N skyline query).
Yi-Chung Chen, Chiang Lee
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The Farthest Spatial Skyline Queries
Information Systems, 2013Pareto-optimal objects are favored as each of such objects has at least one competitive edge against all other objects, or ''not dominated''. Recently, in the database literature, skyline queries have gained attention as an effective way to identify such pareto-optimal objects. In particular, this paper studies the pareto-optimal objects in perspective
Gae-won You +3 more
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