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Browsing by Subject "Hermilíkön"
Now showing items 1-19 of 19
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(Institute of Electrical and Electronics Engineers (IEEE), 2020-04-13)The paper proposes a novel framework for accelerated re-design (dimension scaling) of antenna structures using inverse surrogates. The major contribution of the work is a sensitivity-based model identification procedure, which permits a significant ... -
(2023-06)Crowd simulation focuses on modeling the movements and behaviors of large groups of people. This area of study has become increasingly important because of its several applications in various fields such as urban planning, safety, and entertainment. ...
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(Háskólinn í Reykjavík, 2013-03-24)Structural Operational Semantics (SOS) is a well known standard for specifying language semantics in a natural, yet rigorous way. Once a formal way of checking for the equivalence of two programs written in such a language is provided, it is of great ...
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(Elsevier BV, 2017-10)Study region The hydropower reservoir of Gigerwald is located in the alpine valley Calfeisental in eastern Switzerland. The lake is fed by runoff from rain, snow melt and ice melt from a few small glaciers, as well as by water collected in a ...
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(2022-02-16)System dynamics and agent-based simulation modelling approaches have a potential as tools to evaluate the impact of policy related decision making in food value chains. The context is that a food value chain involves flows of multiple products, financial ...
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(Elsevier BV, 2020-01)An increasing interest has emerged in correlating the output of the concrete mixing truck to values obtained by rotational rheometers. The output of the former has usually been the hydraulic pressure needed to turn the drum. In such research, experimental ...
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Cost-Efficient Bi-Layer Modeling of Antenna Input Characteristics Using Gradient Kriging Surrogates (Institute of Electrical and Electronics Engineers (IEEE), 2020)Over the recent years, surrogate modeling has been playing an increasing role in the design of antenna structures. The main incentive is to mitigate the issues related to high cost of electromagnetic (EM)-based procedures. Among the various techniques, ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2021-07)The nature of dark matter (DM) as a particle is still an unresolved mystery in Physics. Therefore, a vast amount of competing particle models have been proposed. A promising category among these models are those that include relevant collisional damping ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2020)Contemporary microwave design heavily relies on full-wave electromagnetic (EM) simulation tools. This is especially the case for miniaturized devices where EM cross-coupling effects cannot be adequately accounted for using equivalent network models. ...
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(American Society of Mechanical Engineers, 2020-01-21)Wood and paper residues are usually processed as wastes, but they can also be used to produce electrical and thermal energy through processes of thermochemical conversion of gasification. This study proposes a new steady state simulation model for down ...
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(Hindawi Limited, 2019-05-16)The electronic properties of graphene nanoflakes (GNFs) with embedded hexagonal boron nitride (hBN) domains are investigated by combined ab initio density functional theory calculations and machine-learning techniques. The energy gaps of the quasi-0D ...
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(Institute of Electrical and Electronics Engineers (IEEE), 2020)In this paper, spatial and polarization diversities are simultaneously implemented in an ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna to reduce the correlation between the parallel-placed radiators. The keystone of the antenna is ...
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(MDPI, 2021-05-01)In order to accurately anticipate the proficiency of downdraft biomass gasification linked with a water–gas shift unit to produce biohydrogen, a model based on an artificial neural network (ANN) approach is established to estimate the specific mass ...
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(MDPI AG, 2019-07-09)In order to minimize the number of evaluations of high-fidelity (fine) model in the optimization process, to increase the optimization speed, and to improve optimal solution accuracy, a robust and computational-efficient multi-fidelity local surrogate-model ...
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(Walter de Gruyter GmbH, 2016-12-13)Re-design of a given antenna structure for various substrates is a practically important issue yet non trivial, particularly for wideband and ultra-wideband antennas. In this work, a technique for expedited redesign of ultra-wideband antennas for various ...
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(MDPI AG, 2021-01-08)Fairness issues within food systems are of increasing concern for policy makers and other stakeholders. Given the topicality and policy relevance of fairness within food systems, there is value in exploring the subject further. Simulation modelling has ...
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(2016-06)This dissertation is composed of two parts. In the first part, performance evaluation and verification of safety properties are provided for real-time actors. Recently, the actor-based language, Timed Rebeca, was introduced to model distributed and ...
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(Oxford University Press (OUP), 2016-11-20)Efficiency improvement is of great significance for simulation-driven antenna design optimization methods based on evolutionary algorithms (EAs). The two main efficiency enhancement methods exploit data-driven surrogate models and/or multi-fidelity ...
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(Scientific Research Publishing, Inc,, 2019-06-23)Biomass is one of the most widely available energy sources and gasification is a thermal conversion process where biomass is transformed into a fuel gas with a gasifying agent. In this paper by using ASPEN Plus, a new steady state simulation model ...
Now showing items 1-19 of 19