Results 71 to 80 of about 1,381,457 (160)
Efficient evaluation of Top-k Skyline queries.
Revista Técnica de la Facultad de Ingeniería, 2010 Emerging technologies have made available very large data repositories, which may be unreliable for a given preference criteria. In order to be able to process these repositories, users may need to discard useless information based on some preference ...
Marlene Goncalves, María Esther Vidal
doaj
IO-Top-k: index-access optimized top-k query processing
, 2006 Top-k query processing is an important building block for ranked retrieval, with applications ranging from text and data integration to distributed aggregation of network logs and sensor data. Top-k queries operate on index lists for a query's elementary conditions and aggregate scores for result candidates.
Bast, Holger +4 more
openaire +2 more sources
Identification of top-K nodes in large networks using Katz centrality
Journal of Big Data, 2017 Network theory concepts form the core of algorithms that are designed to uncover valuable insights from various datasets. Especially, network centrality measures such as Eigenvector centrality, Katz centrality, PageRank centrality etc., are used in ...
Justin Zhan +2 more
doaj +1 more source
Top-k SAS : on reliable retrieval of top-k tags
, 2020 above method is quite challenging. To address this problem, we propose a learning-based method which applies machine learning models to estimate whether the k most frequent tags are qualified to be the top-k tags. Experiment on the same datasets demonstrate that the learning-based method achieves comparable performance while overcoming the difficulty of ...
openaire +1 more source
Evaluación eficiente de consultas Top-k Skyline
Revista Técnica de la Facultad de IngenieríaTecnologías emergentes permiten el acceso a grandes repositorios de datos, mucho de los cuales pueden publicar datos pocos confiables. Los usuarios que acceden independientemente a estos repositorios deben ser capaces de identificar y descartar ...
Marlene Goncalves, María-Esther Vidal
doaj
Efficient Authentication of Multi-Dimensional Top-
IEEE Access, 2019 With the increasing popularity of cloud computing, query outsourcing services are becoming widely available for many business applications. However, the third-party cloud server which provides query service is untrusted, and thus the correctness of query
Xiaoyu Zhu +4 more
doaj +1 more source
Efficient Top-k Spatial Dataset Search Processing
Applied SciencesIn this paper, we introduce two novel top-k spatial dataset search schemes, KSDS and KSDS+. The core innovation of these schemes lies in partitioning the spatial datasets into grids and assessing similarity based on the distribution of points within ...
Jie Sun +6 more
doaj +1 more source
SFTopk: Secure Functional Top-
IEEE Access, 2015 Providing top-k query services is relevant for storage servers which collect valuable files/data and process queries for data owners and mobile users.
Yao-Tung Tsou +3 more
doaj +1 more source
Efficient Spatial Keyword Search in Trajectory Databases
, 2012 An increasing amount of trajectory data is being annotated with text descriptions to better capture the semantics associated with locations. The fusion of spatial locations and text descriptions in trajectories engenders a new type of top-$k$ queries ...
Cong, Gao +4 more
core
ACCF:Time Prediction Mechanism-driven Top-k Flow Measurement [PDF]
Jisuanji kexueIn addressing the problem that current top-k flow measurement filtering algorithms depend on fixed counter thresholds,a measurement structure named ACCF based on the activity prediction mechanism has been put forward.ACCF incorporates the activity ...
HU Yongqing, YANG Han, LIU Ziyuan, QING Guangjun, DAI Qinglong
doaj +1 more source