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Selected Papers from the 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization...
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Selected Papers from the 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (IC-EPSMSO 2017)

A special issue of Computation (ISSN 2079-3197). This special issue belongs to the section "Computational Engineering".

Deadline for manuscript submissions: closed (15 December 2017) | Viewed by 29389

Special Issue Editor

Prof. Dr. Demos T. Tsahalis

E-Mail Website
Guest Editor
Learning Foundation in Mechatronics (LFME), Irakleiou 17, GR-11141 Athens, Greece
Interests: mechatronics; unsteady boundary layers; separation; vortex-induced vibrations; active control; noise; vibrations; health monitoring; structures; human response; modeling; artificial neural networks; multiobjective optimization; genetic algorithms; expert systems; artificial intelligence
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Special Issue Information

Dear Colleagues,

The 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (7th IC-EpsMsO) was held in Athens, Greece, 5–8 July 2017, at The Best Western Fenix Hotel Conference Centre, comprised of the Attica Center and Chios Hall in Glyfada, Athens, Greece. For more information about the conference, please visit the conference website (www.epsmso.gr).

Selected papers, presented at the conference and included in the conference proceedings will be considered for inclusion in this Special Issue. The authors of the selected papers will be notified by the Conference Chairman, in due time, to submit their papers to this Special Issue of the journal Computation, the latest by 15 December 2017, if they so wish. Submitted papers could be extended, from their conference size, to include new results, if any. All submitted papers will undergo the journal’s standard peer-review procedure. Accepted papers will be published in open access in Computation and collected together in this Special Issue website. The papers accepted for publication will be charged with a preferrential, discounted Article Processing Charge (APC) of 250 CHF, instead of the 350 CHF full APC for this journal.

Please prepare and format your paper according to the Instructions for Authors. Use the LaTeX or Microsoft Word template file of the journal (both are available from the Instructions for Authors page). Manuscripts should be submitted online via the susy.mdpi.com editorial system.

Prof. Dr. Demos T. Tsahalis
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Computation is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

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Published Papers (6 papers)

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Research

13 pages, 1907 KiB  
Article
Coefficients Calculation in Pascal Approximation for Passive Filter Design
by George B. Kasapoglu, Evangelia A. Karagianni, Michael E. Fafalios and Ioannis A. Koukos
Computation 2018, 6(1), 18; https://doi.org/10.3390/computation6010018 - 14 Feb 2018
Cited by 2 | Viewed by 4376
Abstract
The recently modified Pascal function is further exploited in this paper in the design of passive analog filters. The Pascal approximation has non-equiripple magnitude, in contrast of the most well-known approximations, such as the Chebyshev approximation. A novelty of this work is the [...] Read more.
The recently modified Pascal function is further exploited in this paper in the design of passive analog filters. The Pascal approximation has non-equiripple magnitude, in contrast of the most well-known approximations, such as the Chebyshev approximation. A novelty of this work is the introduction of a precise method that calculates the coefficients of the Pascal function. Two examples are presented for the passive design to illustrate the advantages and the disadvantages of the Pascal approximation. Moreover, the values of the passive elements can be taken from tables, which are created to define the normalized values of these elements for the Pascal approximation, as Zverev had done for the Chebyshev, Elliptic, and other approximations. Although Pascal approximation can be implemented to both passive and active filter designs, a passive filter design is addressed in this paper, and the benefits and shortcomings of Pascal approximation are presented and discussed. Full article
(This article belongs to the Special Issue Selected Papers from the 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (IC-EPSMSO 2017))
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17 pages, 13783 KiB  
Article
Simulation and Optimization of Control of Selected Phases of Gyroplane Flight
by Wienczyslaw Stalewski
Computation 2018, 6(1), 16; https://doi.org/10.3390/computation6010016 - 6 Feb 2018
Cited by 4 | Viewed by 4777
Abstract
Optimization methods are increasingly used to solve problems in aeronautical engineering. Typically, optimization methods are utilized in the design of an aircraft airframe or its structure. The presented study is focused on improvement of aircraft flight control procedures through numerical optimization. The optimization [...] Read more.
Optimization methods are increasingly used to solve problems in aeronautical engineering. Typically, optimization methods are utilized in the design of an aircraft airframe or its structure. The presented study is focused on improvement of aircraft flight control procedures through numerical optimization. The optimization problems concern selected phases of flight of a light gyroplane—a rotorcraft using an unpowered rotor in autorotation to develop lift and an engine-powered propeller to provide thrust. An original methodology of computational simulation of rotorcraft flight was developed and implemented. In this approach the aircraft motion equations are solved step-by-step, simultaneously with the solution of the Unsteady Reynolds-Averaged Navier–Stokes equations, which is conducted to assess aerodynamic forces acting on the aircraft. As a numerical optimization method, the BFGS (Broyden–Fletcher–Goldfarb–Shanno) algorithm was adapted. The developed methodology was applied to optimize the flight control procedures in selected stages of gyroplane flight in direct proximity to the ground, where proper control of the aircraft is critical to ensure flight safety and performance. The results of conducted computational optimizations proved the qualitative correctness of the developed methodology. The research results can be helpful in the design of easy-to-control gyroplanes and also in the training of pilots for this type of rotorcraft. Full article
(This article belongs to the Special Issue Selected Papers from the 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (IC-EPSMSO 2017))
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19 pages, 9714 KiB  
Article
Analysis, Synchronization and Circuit Design of a 4D Hyperchaotic Hyperjerk System
by Petros A. Daltzis, Christos K. Volos, Hector E. Nistazakis, Andreas D. Tsigopoulos and George S. Tombras
Computation 2018, 6(1), 14; https://doi.org/10.3390/computation6010014 - 6 Feb 2018
Cited by 14 | Viewed by 4607
Abstract
In this work, a 4D hyperchaotic hyperjerk system, with better results for its Lyapunov exponents and Kaplan–Yorke dimension regarding other systems of this family, as well as its circuit implementation, is presented. Hyperchaotic hyperjerk systems depict complex dynamical behavior in a high-dimensional phase [...] Read more.
In this work, a 4D hyperchaotic hyperjerk system, with better results for its Lyapunov exponents and Kaplan–Yorke dimension regarding other systems of this family, as well as its circuit implementation, is presented. Hyperchaotic hyperjerk systems depict complex dynamical behavior in a high-dimensional phase space with n ≥ 4, offering robustness against many types of attacks in private communications. For this reason, an adaptive controller in order to achieve global chaos synchronization of coupled 4D hyperchaotic hyperjerk systems with unknown parameters is designed. The adaptive results in this work are proved using Lyapunov stability theory and the effectiveness of the proposed synchronization scheme is confirmed through the simulation results. Full article
(This article belongs to the Special Issue Selected Papers from the 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (IC-EPSMSO 2017))
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10 pages, 5212 KiB  
Article
A Microwave Reflectometry Technique for Profiling the Dielectric-Conductivity Properties of the Hagia Sophia Globe
by Christos Vazouras, George B. Kasapoglu, Evangelia A. Karagianni and Nikolaos K. Uzunoglu
Computation 2018, 6(1), 12; https://doi.org/10.3390/computation6010012 - 2 Feb 2018
Cited by 2 | Viewed by 3979
Abstract
A microwave free space reflectometry technique with swept frequency measurements for the profiling of wall structures and the detection of hidden (covered) layers has been applied to the Hagia Sophia byzantine monument. Experimental measurement results are presented and compared with three-dimensional (3D) simulated [...] Read more.
A microwave free space reflectometry technique with swept frequency measurements for the profiling of wall structures and the detection of hidden (covered) layers has been applied to the Hagia Sophia byzantine monument. Experimental measurement results are presented and compared with three-dimensional (3D) simulated results, exhibiting fair agreement in some (though not all) aspects. Based on the experimental results, the possibility of clear discrimination between regions with and without covered mosaic layers, and hence the detection of such layers, is demonstrated. Full article
(This article belongs to the Special Issue Selected Papers from the 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (IC-EPSMSO 2017))
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18 pages, 6188 KiB  
Article
Seismic Response of Adjacent Unequal Buildings Subjected to Double Pounding Considering Soil-Structure Interaction
by Denise-Penelope N. Kontoni and Ahmed Abdelraheem Farghaly
Computation 2018, 6(1), 10; https://doi.org/10.3390/computation6010010 - 1 Feb 2018
Cited by 20 | Viewed by 5145
Abstract
Various cases of two adjacent multi-story buildings with different numbers of floors and equal or unequal foundation levels under earthquake loading and considering soil-structure interaction (SSI) are investigated. A two-dimensional model for each case of the two adjacent unequal buildings without separation distance [...] Read more.
Various cases of two adjacent multi-story buildings with different numbers of floors and equal or unequal foundation levels under earthquake loading and considering soil-structure interaction (SSI) are investigated. A two-dimensional model for each case of the two adjacent unequal buildings without separation distance is used and a special arrangement of contact elements in the contact zone is employed to fulfil all possible deformation contact modes which take place under seismic loading. The soil is modelled by two-dimensional 4-node elements which are in contact with the foundations of the two adjacent buildings. This paper studies the earthquake-induced double pounding that takes place between the two adjacent unequal height buildings in some upper points at superstructure in the contact zone and also at foundation level, considering soil-structure interaction (SSI). The double pounding and the soil-structure interaction (SSI) effects should be taken into consideration in the seismic analysis of adjacent buildings especially those with different heights and different foundation levels. Full article
(This article belongs to the Special Issue Selected Papers from the 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (IC-EPSMSO 2017))
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16 pages, 3322 KiB  
Article
3D FEM Analysis of a Pile-Supported Riverine Platform under Environmental Loads Incorporating Soil-Pile Interaction
by Denise-Penelope N. Kontoni and Ahmed Abdelraheem Farghaly
Computation 2018, 6(1), 8; https://doi.org/10.3390/computation6010008 - 25 Jan 2018
Cited by 7 | Viewed by 5860
Abstract
An existing riverine platform in Egypt, together with its pile group foundation, is analyzed under environmental loads using 3D FEM structural analysis software incorporating soil-pile interaction. The interaction between the transfer plate and the piles supporting the platform is investigated. Two connection conditions [...] Read more.
An existing riverine platform in Egypt, together with its pile group foundation, is analyzed under environmental loads using 3D FEM structural analysis software incorporating soil-pile interaction. The interaction between the transfer plate and the piles supporting the platform is investigated. Two connection conditions were studied assuming fixed or hinged connection between the piles and the reinforced concrete platform for the purpose of comparison of the structural behavior. The analysis showed that the fixed or hinged connection condition between the piles and the platform altered the values and distribution of displacements, normal force, bending moments, and shear forces along the length of each pile. The distribution of piles in the pile group affects the stress distribution on both the soil and platform. The piles were found to suffer from displacement failure rather than force failure. Moreover, the resulting bending stresses on the reinforced concrete plate in the case of a fixed connection between the piles and the platform were almost doubled and much higher than the allowable reinforced concrete stress and even exceeded the ultimate design strength and thus the environmental loads acting on a pile-supported riverine offshore platform may cause collapse if they are not properly considered in the structural analysis and design. Full article
(This article belongs to the Special Issue Selected Papers from the 7th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (IC-EPSMSO 2017))
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