Listar Laboratorio de Bases de Datos (LBD) por data de publicación
Mostrando ítems 1-20 de 78
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Aggregated 2D range queries on clustered points
(Elsevier Ltd, 2016-09)[Abstract] Efficient processing of aggregated range queries on two-dimensional grids is a common requirement in information retrieval and data mining systems, for example in Geographic Information Systems and OLAP cubes. ... -
Efficient and Compact Representations of Some Non-canonical Prefix-Free Codes
(Springer, 2016-09-21)[Abstract] For many kinds of prefix-free codes there are efficient and compact alternatives to the traditional tree-based representation. Since these put the codes into canonical form, however, they can only be used when ... -
GraCT: A Grammar Based Compressed Representation of Trajectories
(Springer, 2016-09-21)[Abstract] We present a compressed data structure to store free trajectories of moving objects (ships over the sea, for example) allowing spatio-temporal queries. Our method, GraCT, uses a k2k2 -tree to store the absolute ... -
Compact Trip Representation over Networks
(Springer, 2016-09-21)[Abstract] We present a new Compact Trip Representation ( CTRCTR ) that allows us to manage users’ trips (moving objects) over networks. These could be public transportation networks (buses, subway, trains, and so on) where ... -
Efficient Representation of Multidimensional Data over Hierarchical Domains
(Springer, 2016-09-21)[Abstract] We consider the problem of representing multidimensional data where the domain of each dimension is organized hierarchically, and the queries require summary information at a different node in the hierarchy of ... -
Parallel construction of wavelet trees on multicore architectures
(Springer U K, 2016-10-05)[Abstract] The wavelet tree has become a very useful data structure to efficiently represent and query large volumes of data in many different domains, from bioinformatics to geographic information systems. One problem ... -
Grammar compressed sequences with rank/select support
(Elsevier BV, 2016-10-14)[Abstract] Sequence representations supporting not only direct access to their symbols, but also rank/select operations, are a fundamental building block in many compressed data structures. Several recent applications need ... -
A succinct data structure for self-indexing ternary relations
(Elsevier BV, 2016-10-27)[Abstract] The representation of binary relations has been intensively studied and many different theoretical and practical representations have been proposed to answer the usual queries in multiple domains. However, ternary ... -
Universal indexes for highly repetitive document collections
(Elsevier Ltd, 2016-11)[Abstract] Indexing highly repetitive collections has become a relevant problem with the emergence of large repositories of versioned documents, among other applications. These collections may reach huge sizes, but are ... -
A New Method to Index and Store Spatio-Temporal Data
(2016-11-16)[Abstract] We propose a data structure that stores, in a compressed way, object trajectories, which at the same time, allow to efficiently response queries without the need to decompress the data. We use a data structure, ... -
Navigational Rule Derivation: An algorithm to determine the effect of traffic signs on road networks
(2016-11-17)[Abstract] In this paper we present an algorithm to build a road network map enriched with traffic rules such as one-way streets and forbidden turns, based on the interpretation of already detected and classified traffic ... -
3DGraCT: A Grammar-Based Compressed Representation of 3D Trajectories
(Springer, 2018)[Abstract]: Much research has been published about trajectory management on the ground or at the sea, but compression or indexing of flight trajectories have usually been less explored. However, air traffic management is ... -
Scalable processing and autocovariance computation of big functional data
(John Wiley & Sons, 2018)[Abstract]: This paper presents 2 main contributions. The first is a compact representation of huge sets of functional data or trajectories of continuous-time stochastic processes, which allows keeping the data always ... -
Experiencias y resultados para facilitar la compatibilización de un máster interuniversitario con un trabajo a tiempo completo
(Asociación de Enseñantes Universitarios de la Informática (AENUI), 2018)[Resumen]: Presentamos un Máster interuniversitario en Geoinformática, impartido por las universidades de A Coruña y Vigo, y diseñado para que el alumno trabajador pueda seguir las clases. El máster se basa en el uso de ... -
Exploiting Computation-Friendly Graph Compression Methods for Adjacency-Matrix Multiplication
(IEEE Computer Society, 2018-03)[Abstract] Computing the product of the (binary) adjacency matrix of a large graph with a real-valued vector is an important operation that lies at the heart of various graph analysis tasks, such as computing PageRank. In ... -
Towards a Compact Representation of Temporal Rasters
(Springer Nature, 2018-09)[Abstract]: Big research efforts have been devoted to efficiently manage spatio-temporal data. However, most works focused on vectorial data, and much less, on raster data. This work presents a new representation for raster ... -
Managing Compressed Structured Text
(Springer Nature, 2018-12-07)[Definition]: Compressing structured text is the problem of creating a reduced-space representation from which the original data can be re-created exactly. Compared to plain text compression, the goal is to take advantage ... -
GraCT: A Grammar-based Compressed Index for Trajectory Data
(Elsevier Ltd, 2019)[Abstract]: We introduce a compressed data structure for the storage of free trajectories of moving objects that efficiently supports various spatio-temporal queries. Our structure, dubbed GraCT, stores the absolute positions ... -
Experiencias e impacto social en la aplicación de ingeniería de requisitos en el desarrollo de una plataforma inteligente
(Universidad Peruana Unión (UPeU), 2019)[Resumen]: El turismo rural comunitario (TRC) es una actividad que contribuye, desde las zonas rurales, al desarrollo económico-social y sostenible de un país. En este trabajo de investigación se tuvo como objetivo desarrollar ... -
Microservice-oriented platform for internet of big data analytics: A proof of concept
(MDPI AG, 2019-03-01)[Abstract]: The ubiquitous Internet of Things (IoT) devices nowadays are generating various and numerous data from everywhere at any time. Since it is not always necessary to centralize and analyze IoT data cumulatively ...