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  • Open Access


    Fast Access and Retrieval of Big Data Based on Unique Identification

    Wenshun Sheng1,*, Aiping Xu2, Shengli Wu3

    Intelligent Automation & Soft Computing, Vol.32, No.3, pp. 1781-1795, 2022, DOI:10.32604/iasc.2022.022571

    Abstract In big data applications, the data are usually stored in data files, whose data file structures, field structures, data types and lengths are not uniform. Therefore, if these data are stored in the traditional relational database, it is difficult to meet the requirements of fast storage and access. To solve this problem, we propose the mapping model between the source data file and the target HBase file. Our method solves the heterogeneity of the file object and the universality of the storage conversion. Firstly, based on the mapping model, we design “RowKey”, generation rules and More >

  • Open Access


    An Improved Distributed Query for Large-Scale RDF Data

    Aoran Li1, Xinmeng Wang1, Xueliang Wang4, Bohan Li1,2,3,*

    Journal on Big Data, Vol.2, No.4, pp. 157-166, 2020, DOI:10.32604/jbd.2020.010358

    Abstract The rigid structure of the traditional relational database leads to data redundancy, which seriously affects the efficiency of the data query and cannot effectively manage massive data. To solve this problem, we use distributed storage and parallel computing technology to query RDF data. In order to achieve efficient storage and retrieval of large-scale RDF data, we combine the respective advantage of the storage model of the relational database and the distributed query. To overcome the disadvantages of storing and querying RDF data, we design and implement a breadth-first path search algorithm based on the keyword More >

  • Open Access


    Modelling of Energy Storage Photonic Medium by WavelengthBased Multivariable Second-Order Differential Equation

    T. Binesh1, *

    CMES-Computer Modeling in Engineering & Sciences, Vol.123, No.1, pp. 333-351, 2020, DOI:10.32604/cmes.2020.08097

    Abstract Wavelength-dependent mathematical modelling of the differential energy change of a photon has been performed inside a proposed hypothetical optical medium. The existence of this medium demands certain mathematical constraints, which have been derived in detail. Using reverse modelling, a medium satisfying the derived conditions is proven to store energy as the photon propagates from the entry to exit point. A single photon with a given intensity is considered in the analysis and hypothesized to possess a definite non-zero probability of maintaining its energy and velocity functions analytic inside the proposed optical medium, despite scattering, absorption, More >

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