Skyline with presorting
Webb1 jan. 2009 · We propose a skyline algorithm, SFS, based on presorting that is general, for use with any skyline query, efficient, and well behaved in a relational setting. View. Show abstract. WebbConsidering a group of users, each specifying individual preferences over categorical attributes, the problem of determining a set of objects that are objectively preferable by all users is challenging on two levels. First, we need to determine the ...
Skyline with presorting
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WebbHowever, most real-world applications constrain the distance between query location and data objects by a road network, where distance between two points is defined by the shortest connecting path. This paper proposes geo-social top- k keyword queries and geo-social skyline keyword queries on road networks. Webb28 maj 2006 · Several research works on skyline query processing over certain data exist, as most of the proposed algorithms for computing skylines assumed that the values …
WebbYou are given a set of n rectangles in no particular order. They have varying widths and heights, but their bottom edges are collinear, so that they look like buildings on a skyline. For each rectangle, you’re given the x position of the left edge, the x position of the right edge, and the height. Your task is to draw an outline around the set of rectangles so that … Webb17 okt. 2016 · In this paper, we propose a fast skyline computation approach, called HashSkyline, with two unique features: First, HashSkyline minimizes the pre-processing …
WebbThe maximal vector problem is to identify the maximals over a collection of vectors. This arises in many contexts and, as such, has been well studied.The problem recently gained renewed attention with skyline queries for relational databases and with work to develop skyline algorithms that are external and relationally well behaved. WebbSkyline definition, the boundary line between earth and sky; the apparent horizon: A sail appeared against the skyline. See more.
WebbSkyline query, as a query method to solve typical multiobjective optimization problems, has a wide range of applications in market analysis and data mining. ... “ Skyline with presorting,” in Proceedings of the 19th International Conference on Data Engineering, ...
Webb8 maj 2010 · In this paper, we consider skyline queries in a mobile and distributed environment, where data objects are distributed in some sites (database servers) which are interconnected through a high-speed wired network, and queries are issued by mobile units (laptop, cell phone, etc.) which access the data objects of database servers by wireless … the boy who bakes chocolate chip cookieWebbThe skyline, or Pareto, operator selects those tuples that are not dominated by any others. Extending relational systems with the skyline operator would offer a basis for handling … the boy who bakes sourdoughWebbYou are given a set of n rectangles in no particular order. They have varying widths and heights, but their bottom edges are collinear, so that they look like buildings on a skyline. … the boy who became a stone moral lessonWebbAbstract: Most algorithms for the high-dimensional data clustering are not intuitive and the clustering results are difficult to explain. To solve these problems, a new method based on the interactive visualization technology was proposed in this paper. First, the entropy-weight was adopted to determine the main attributes and how to arrange them. the boy who bakes sourdough breadWebbDominance and Skyline Given a set of d dimensional points T: We say that one point t 1 dominates another point t 2 if and only if: t 1 is better than or equal to t 2 on all dimensions, and t 1 is better than t 2 on at least one dimension. Here “better” can be either “smaller better”(minimum skyline) or “larger better”(maximum skyline) or any the boy who became a stone authorWebbWe propose an efficient algorithm that can compute skyline probability exactly for reasonably large database.We introduce the concept of zero-contributing set which has zero ... Skyline with presorting: Theory and optimizations, Springer, 2005. Google Scholar; bib0011 P. Godfrey, R. Shipley, J. Gryz, Maximal vector computation in large data ... the boy who beeps youtubeWebbexplored as a general, relational algorithm for skyline. We show that BNL can be revised via presorting to build a more effective algorithm. We call our algorithm sort-filter-skyline, … the boy who bakes sourdough cookies