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    Stability and iterative convergence of water cycle algorithm for computationally expensive and combinatorial Internet shopping optimisation problems

    , Article Journal of Experimental and Theoretical Artificial Intelligence ; Volume 31, Issue 5 , 2019 , Pages 701-721 ; 0952813X (ISSN) Sayyaadi, H ; Sadollah, A ; Yadav, A ; Yadav, N ; Sharif University of Technology
    Taylor and Francis Ltd  2019
    Abstract
    Water cycle algorithm (WCA) is a population-based metaheuristic algorithm, inspired by the water cycle process and movement of rivers and streams towards sea. The WCA shows good performance in both exploration and exploitation phases. Further, the relationship between improvised exploitation and each parameter under asymmetric interval is derived and an iterative convergence of WCA is proved theoretically. In this paper, CEC’15 computationally expensive benchmark problems (i.e., 15 problems) have been considered for efficiency measurement of WCA accompanied with other optimisers. Also, a new discretisation strategy for the WCA has been proposed and applied along with other optimisers for... 

    Development of a shell superelement for large deformation and free vibration analysis of composite spherical shells

    , Article Engineering with Computers ; Volume 37, Issue 4 , 2021 , Pages 3551-3567 ; 01770667 (ISSN) Shamloofard, M ; Hosseinzadeh, A ; Movahhedy, M. R ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2021
    Abstract
    Finite element analysis of huge and/or complicated structures often requires long times and large computational expenses. Superelements are huge elements that exploit the deformation theory of a specific problem to provide the capability of discretizing the problem with minimum number of elements. They are employed to reduce the computational cost while retaining the accuracy of results in FEM analysis of engineering problems. In this research, a new shell superelement is presented to study linear/nonlinear static and free vibration analysis of spherical structures with partial or full spherical geometries that exist in many industrial applications. Furthermore, this study investigates the... 

    Development of a shell superelement for large deformation and free vibration analysis of composite spherical shells

    , Article Engineering with Computers ; 2020 Shamloofard, M ; Hosseinzadeh, A ; Movahhedy, M. R ; Sharif University of Technology
    Springer  2020
    Abstract
    Finite element analysis of huge and/or complicated structures often requires long times and large computational expenses. Superelements are huge elements that exploit the deformation theory of a specific problem to provide the capability of discretizing the problem with minimum number of elements. They are employed to reduce the computational cost while retaining the accuracy of results in FEM analysis of engineering problems. In this research, a new shell superelement is presented to study linear/nonlinear static and free vibration analysis of spherical structures with partial or full spherical geometries that exist in many industrial applications. Furthermore, this study investigates the...