Mapping coupled time-series onto a complex network

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dc.contributor.author Ardalankia, Jamshid
dc.contributor.author Askari, Jafar
dc.contributor.author Sheykhali, Somaye
dc.contributor.author Haven, Emmanuel
dc.contributor.author Reza Jafari, G.
dc.date.accessioned 2021-02-10T06:32:18Z
dc.identifier.uri http://hdl.handle.net/11201/155035
dc.description.abstract [eng] In order to extract hidden joint information from two possibly uncorrelated time-series, we explored the measures of network science. Alongside common methods in time-series analysis of the economic markets, the mapping joint structure of two time-series onto a network provides insight into hidden aspects embedded in the couplings. We quantize the amplitude of two time-series and investigate relative simultaneous locations of those amplitudes. Each segment of a quantized amplitude is considered as a node. The simultaneity of the amplitudes of the two time-series is considered as the links in the network. The frequency of occurrences forms the weighted links. In order to extract information, we need to measure to what extent the coupling deviates from the coupling of two uncoupled series. Also, we need to measure to what extent the couplings inherit their characteristics from a Gaussian distribution or a non-Gaussian distribution. We mapped the network from two surrogate time-series. The results show that the couplings of markets possess some features which diverge from the same features of the network mapped from white noise, and from the network mapped from two surrogate time-series. These deviations prove that there exist joint information and cross-correlation therein. By applying the network's topological and statistical measures and the deformation ratio in the joint probability distribution, we distinguished basic structures of cross-correlation and coupling of cross-markets. It was discovered that even two possibly known uncorrelated markets may possess some joint patterns with each other. Thereby, those markets should be examined as coupled and weakly coupled markets.
dc.format application/pdf
dc.relation.isformatof Versió postprint del document publicat a: https://doi.org/10.1209/0295-5075/132/58002
dc.relation.ispartof Epl, 2021, vol. 132, num. 5, p. 58002-1-58002-7
dc.rights (c) Europhysics Letters Association (EPLA), 2021
dc.subject.classification 53 - Física
dc.subject.classification 621.3 - Enginyeria elèctrica. Electrotècnia. Telecomunicacions 621.3 - Ingeniería eléctrica. Electrotecnia. Telecomunicaciones 621.3 - Electrical engineering
dc.subject.other 53 - Physics
dc.title Mapping coupled time-series onto a complex network
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/acceptedVersion
dc.date.updated 2021-02-10T06:32:18Z
dc.date.embargoEndDate info:eu-repo/date/embargoEnd/2026-12-31
dc.embargo 2026-12-31
dc.rights.accessRights info:eu-repo/semantics/embargoedAccess
dc.identifier.doi https://doi.org/10.1209/0295-5075/132/58002


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