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DC FieldValueLanguage
dc.contributorDepartment of Computingen_US
dc.contributor.advisorChung, Fu-lai Korris (COMP)-
dc.creatorHung, Ying Kit-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/9402-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titlePerceptually important point identification for big data analytics : performance analysis and applicationsen_US
dcterms.abstractThe concept of the Perceptually Important Point (PIP) identification process is introduced in 2001 in the field of times data mining. This process is originally work for financial time series pattern matching and it is then found suitable for time series dimensionality reduction and representation. The PIP strength is that it is able to preserve the overall shape of the time series by identifying the salient points. With the rise of Big Data, time series data contributes a major proportion, especially on the data which generates by sensors in the Internet of Things (IoT) environment. According to the nature of PIP identification and the successful cases, it is worth to further explore the opportunity to apply PIP in time series "Big Data". However, the performance of PIP identification is always considered as the limitation when dealing with "Big" time series data. In this dissertation, performance of PIP identification, which always limits the usability of this process, is studied in detail. Improvement algorithms on both algorithmic level and distributed environment are proposed and evaluated. Significant improvement in terms of speed is obtained by these improvement algorithms. In addition, the applications of PIP are reviewed. Then, the usability of PIP for deep learning is evaluated.en_US
dcterms.extentx, 86 pages : illustrationsen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2018en_US
dcterms.educationalLevelM.Sc.en_US
dcterms.educationalLevelAll Masteren_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.LCSHData miningen_US
dcterms.LCSHBig dataen_US
dcterms.accessRightsrestricted accessen_US

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Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/9402