The Experts below are selected from a list of 19452 Experts worldwide ranked by ideXlab platform
Wim Desmet - One of the best experts on this subject based on the ideXlab platform.
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applications of an isogeometric indirect boundary element method and the importance of accurate Geometrical Representation in acoustic problems
Engineering Analysis With Boundary Elements, 2020Co-Authors: Emin Oguz Inci, Laurens Coox, Onur Atak, Elke Deckers, Wim DesmetAbstract:Abstract This study presents the performance and the potential use of an isogeometric indirect variational boundary element method (IGiBEM) for industrial acoustics applications. The method is validated against semi-analytical frequency response solutions for a basic problem. After being validated, the performance of the IGiBEM is tested and benchmarked against the conventional indirect boundary element method (iBEM) for Geometrically complex industrial applications. A vibrating car hood and a loudspeaker model with a vibrating woofer are used as industrial numerical tests. A non-isoparametric iBEM is included in the benchmarks to distinguish the contribution of the discretization versus the Geometrical errors to overall error. The tests indicate that the Geometrical errors play a more important role in problems involving complex geometries and high-frequency excitations. The study also demonstrates the advantages of IGiBEM over the conventional iBEM regarding the accuracy and computational efficiency for Geometrically complex problems.
Emin Oguz Inci - One of the best experts on this subject based on the ideXlab platform.
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applications of an isogeometric indirect boundary element method and the importance of accurate Geometrical Representation in acoustic problems
Engineering Analysis With Boundary Elements, 2020Co-Authors: Emin Oguz Inci, Laurens Coox, Onur Atak, Elke Deckers, Wim DesmetAbstract:Abstract This study presents the performance and the potential use of an isogeometric indirect variational boundary element method (IGiBEM) for industrial acoustics applications. The method is validated against semi-analytical frequency response solutions for a basic problem. After being validated, the performance of the IGiBEM is tested and benchmarked against the conventional indirect boundary element method (iBEM) for Geometrically complex industrial applications. A vibrating car hood and a loudspeaker model with a vibrating woofer are used as industrial numerical tests. A non-isoparametric iBEM is included in the benchmarks to distinguish the contribution of the discretization versus the Geometrical errors to overall error. The tests indicate that the Geometrical errors play a more important role in problems involving complex geometries and high-frequency excitations. The study also demonstrates the advantages of IGiBEM over the conventional iBEM regarding the accuracy and computational efficiency for Geometrically complex problems.
Roman Orus - One of the best experts on this subject based on the ideXlab platform.
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Topological order on the Bloch sphere
New Journal of Physics, 2020Co-Authors: Rotem Liss, Tal Mor, Roman OrusAbstract:A Bloch sphere is the Geometrical Representation of an arbitrary two-dimensional Hilbert space. Possible classes of entanglement and separability for the pure and mixed states on the Bloch sphere were suggested by [M. Boyer, R. Liss, T. Mor, PRA 95, 032308 (2017)]. Here we construct a Bloch sphere for the Hilbert space spanned by one of the ground states of Kitaev's toric code model and one of its closest product states. We prove that this sphere contains only one separable state, thus belonging to the fourth class suggested by the said paper. We furthermore study the topological order of the pure states on its surface and conclude that, according to conventional definitions, only one state (the toric code ground state) seems to present non-trivial topological order. We conjecture that most of the states on this Bloch sphere are neither ``trivial'' states (namely, they cannot be generated from a product state using a trivial circuit) nor topologically ordered. In addition, we show that the whole setting can be understood in terms of Grover rotations with gauge symmetry, akin to the quantum search algorithm.
R T Fenner - One of the best experts on this subject based on the ideXlab platform.
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analytical integration and exact Geometrical Representation in the two dimensional elastostatic boundary element method
Applied Mathematical Modelling, 2005Co-Authors: W.c. Tang, R T FennerAbstract:Two ways of improving the accuracy of results in the boundary element method are considered. Since the geometries of many problems of practical interest are created from straight lines and circular arcs, errors caused by representing such geometries approximately using quadratic shape functions can be removed using exact Geometrical Representations for straight and circular boundaries. Besides, exact Geometrical Representations enable exact analytical integrations for some situations, thereby eliminating the errors caused by approximate numerical integration. The results of some simple test problems show that the use of exact Representation of straight and circular geometries, and analytical integration in the situations where this is possible, offers worthwhile benefits in the boundary element analysis of two-dimensional elastostatics problems.
Laurens Coox - One of the best experts on this subject based on the ideXlab platform.
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applications of an isogeometric indirect boundary element method and the importance of accurate Geometrical Representation in acoustic problems
Engineering Analysis With Boundary Elements, 2020Co-Authors: Emin Oguz Inci, Laurens Coox, Onur Atak, Elke Deckers, Wim DesmetAbstract:Abstract This study presents the performance and the potential use of an isogeometric indirect variational boundary element method (IGiBEM) for industrial acoustics applications. The method is validated against semi-analytical frequency response solutions for a basic problem. After being validated, the performance of the IGiBEM is tested and benchmarked against the conventional indirect boundary element method (iBEM) for Geometrically complex industrial applications. A vibrating car hood and a loudspeaker model with a vibrating woofer are used as industrial numerical tests. A non-isoparametric iBEM is included in the benchmarks to distinguish the contribution of the discretization versus the Geometrical errors to overall error. The tests indicate that the Geometrical errors play a more important role in problems involving complex geometries and high-frequency excitations. The study also demonstrates the advantages of IGiBEM over the conventional iBEM regarding the accuracy and computational efficiency for Geometrically complex problems.