Application of Confidence Regions to Ice Ridge Keel Data Statistical Assessment

Petr Zvyagin, Jaakko Heinonen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)

    Abstract

    Sets of measurements of underwater ridge parts usually contain a limited amount of data. Outcomes need to be made while relying on small sample sizes. In this event, the chance of making inaccurate estimations increases.

    This paper proposes to use stochastic confidence regions in the estimation of the unknown parameters of keel depths. A model for a random variable with a lognormal distribution for keel depths is assumed. Regions for the mean and standard deviation of keel depths are obtained from Mood’s and minimum-area confidence regions for parameters of the normally distributed random variable. Conservative safety probability of non-exceeding the critical keel depth in one random interaction of the ridge with structure is estimated.

    An algorithm for statistically assessment of ice ridge keel data by means of confidence region building is here offered. The assessment of a set of ridge keel depths for the Gulf of Bothnia (Baltic Sea) is performed.
    Original languageEnglish
    Title of host publicationASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
    Subtitle of host publicationPolar and Arctic Sciences and Technology, Petroleum Technology
    PublisherAmerican Society of Mechanical Engineers ASME
    Number of pages6
    Volume8
    ISBN (Electronic)9780791857762
    ISBN (Print)978-0-7918-5776-2
    DOIs
    Publication statusPublished - 1 Jan 2017
    MoE publication typeA4 Article in a conference publication
    Event36th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2017 - Trondheim, Norway
    Duration: 25 Jun 201730 Jun 2017

    Conference

    Conference36th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2017
    Abbreviated titleOMAE2017
    CountryNorway
    CityTrondheim
    Period25/06/1730/06/17

    Keywords

    • ice ridges
    • ridge keel
    • joint confidence region
    • lognormal distribution

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  • Cite this

    Zvyagin, P., & Heinonen, J. (2017). Application of Confidence Regions to Ice Ridge Keel Data Statistical Assessment. In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering: Polar and Arctic Sciences and Technology, Petroleum Technology (Vol. 8). [OMAE2017-62253] American Society of Mechanical Engineers ASME. https://doi.org/10.1115/OMAE2017-62253