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检索条件"任意字段=IASTED International Conference on Applied Simulation and Modelling"

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Model Generalisation for Predicting the Amount of Photosynthetically Available Radiation in the Water Column from Freefall Profiler Observations 38

Model Generalisation for Predicting the Amount of Photosynth...

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38th ECMS international conference on modelling and simulation, ECMS 2024

作者： Tholen, Christoph Nolle, Lars Wollschläger, Jochen Stahl, Frederic German Research Center for Artificial Intelligence Marie- Curie-Straße 1 Oldenburg26129 Germany Jade University of Applied Sciences Friedrich-Paffrath-Straße 101 Wilhelmshaven26389 Germany Ammerländer Heerstraße 114-118 Oldenburg26129 Germany

In modern oceanography Photosynthetically Available Radiation (PAR) is used for modelling vegetation growth as it is a requirement for the process of photosynthesis. PAR as integrated value of the light spectrum between 400-700 nm can be measured directly using respective sensor systems. However, PAR can also be determined indirectly using measurements from only a small number of discrete wavelengths. In this paper, such a modelling approach is presented for predicting PAR in the water column. The approach uses spectral information within the water column and from above the sea surface. Three different modelling approaches based on artificial intelligence (AI) were used. It was shown that the artificial neural network (ANN) approach outperformed the regression tree (RT) and the linear regression (LR) approaches. It was also shown that the models generalise well, with an accuracy loss of 10 % based on the median, on data recorded in other geolocations without additional modification or re-training. ©ECMS Daniel Grzonka, Natalia Rylko, Grazyna Suchacka, Vladimir Mityushev (Editors) 2024.

关键词： Neural networks

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On Cyber Vulnerability of MASS: A simulation Experiment to Counter a Rudder Controller Attack

On Cyber Vulnerability of MASS: A Simulation Experiment to C...

引用

2024 international conference on applied Mathematics and Computer Science, ICAMCS 2024

作者： Astrov, Igor Bauk, Sanja Tallinn University of Technology Department of Software Science Tallinn Estonia Estonian Maritime Academy Tallinn University of Technology Tallinn Estonia

ISBN: (纸本)9798350363807

The purpose of this paper is twofold: (1) to underscore the vulnerability of Maritime Autonomous Surface Ships (MASSs) to cyber-attacks and (2) to emulate, using a concrete example, a cyber-attack on a rudder controller and its neutralization using a Kalman filter and a PID regulator. Accordingly, the first part of the paper will be based on a scoping review of relevant articles in the domain, including some MASSs projects, probabilistic modelling techniques to address MASSs' vulnerabilities, and cyber-security analysis. The second part of the work will deal with the simulation of a cyber-attack on the rudder controller testbed and its elimination. It is believed that the cyber-attack could occur through an unauthorized intrusion into the MASS Supervisory Control and Data Acquisition (SCADA) system and PLC (Programmable Logic Controller) ladder logic code. The MATLAB/Simulink will be used for the experiment on the testbed. By optimization of the system parameters, the malicious interference caused by the arbitrary shaped periodic signal malicious intrusion into the control system will be eliminated. This will provide the optimal control of the analyzed MASS rudder controller, and a foundation for creating cyber-attacks prevention training data sets. © 2024 IEEE.

关键词： Kalman filters

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BIM design coordination: Conflict analysis and construction simulation

BIM design coordination: Conflict analysis and construction ...

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2023 international conference on ENTERprise Information Systems, CENTERIS 2023 - international conference on Project MANagement, ProjMAN 2023 - international conference on Health and Social Care Information Systems and Technologies, HCist 2023

作者： Sampaio, Alcinia Zita Gomes, Nuno Gomes, Augusto University of Lisbon Higher Technical Institute Dep. Civil Engineering Av Rovisco Pais Lisbon Portugal CERIS Civil Engineering Research and Innovation for Sustainability IST Lisbon Portugal

The Building Information modelling (BIM) methodology has been adopted in the construction industry, supporting the development of projects. Its implementation has improved the collaboration and integration in the design context, increasing the accuracy of the project preparation and the decreasing additional costs and delays of the construction work. The main objective of the present research is to provide an overview of the state of the art of BIM applications, namely, concerning the construction planning. For that, the generation of a BIM 3D model, involving the disciplines of architecture, structures and water supply system was performed. After, over the model a conflict analysis was applied, in order to verify the consistency of all the disciplines, when linked together. In order to obtain a visual simulation of the construction process, the correspondent 4D BIM model was also generated. Along the development of the study, several BIM software were applied over a case study. The main remarks of the capacities of the software, as well as the benefits and limitations verified were identified. © 2024 The Author(s).

关键词： Building Information Model

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Electrothermal modelling of Drain Current in GaN HEMTs using Artificial Neural Network and Global Optimization Techniques

Electrothermal Modelling of Drain Current in GaN HEMTs using...

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2024 IEEE international conference on Modeling, simulation and Intelligent Computing, MoSICom 2024

作者： Jarndal, Anwar Hashmi, Mohammad University of Sharjah Department of Electrical Engineering Sharjah United Arab Emirates Nazarbayev University School of Engineering and Digital Sciences Astana Kazakhstan

ISBN: (纸本)9798331533311

Thermal effect represents one of the main challenges for GaN power transistors. In addition to ambient temperature, the power dissipation-induced self-heating represents the main source of heating. This electrothermal effect must be accounted for by the transistor model to provide reliable circuit design. This paper makes use of a single-hidden layer Artificial Neural Network (ANN) to model the drain current. A recently developed global optimization approach is used to train the model and optimize its weights and biases. The model is applied to 8 × 125-μ m and 16 × 250-μ m GaN High Electron Mobility Transistors (HEMTs) and compared with measurements. Excellent results obtained validate the effectiveness of the ANN-based modeling and optimization methods of power transistors. The main advantage of the approach is its technology independence;thus, it could be applied to a wide range of microwave power transistors. © 2024 IEEE.

关键词： Gallium nitride

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Rolling over simulation and Structure Optimization of Electric Automobile Charging Gun

Rolling over Simulation and Structure Optimization of Electr...

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2024 international conference on applied Mathematics, modelling and Statistics Application, AMMSA 2024

作者： Yuan, Pengfei Jiang, Bingyun Li, Dayong Liu, Junlei Wilfried, Andre Youani, Tiako Co. Ltd. Jiangsu Changzhou213000 China School of Mechanical Engineering Zhejiang University Zhejiang Hangzhou310027 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China

The anti-rolling performance of the electric vehicle charging gun is critical in its daily work. Firstly, to improve the accuracy of the simulation, the tire FEA model is modeled in detail, including the tire airbag simulation tire pressure, the Beam unit simulation tire bead wire, etc. We also calibrate the FEA model of the charging gun. Secondly, through the rolling-over simulation and comparison with the test results, both the gun heads are broken and the damage positions of both are the same, which indicates the accuracy of the rolling-over simulation model. Finally, based on the results of the rolling-over simulation and test, the structure of the charging gun is optimized, the rolling-over simulation and test are carried out again, and the charging gun head and the gun shell are not damaged. The results show that the simulation model can guide the design of the anti-rolling performance of charging gun. © Published under licence by IOP Publishing Ltd.

关键词： Automobile air bags

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Exploring the Impact of Emotional States on Human Performance in Production Systems: A simulation Approach 23

Exploring the Impact of Emotional States on Human Performanc...

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23rd international conference on modelling and applied simulation, MAS 2024

作者： Campanella, Manuel Cimino, Antonio Padovano, Antonio Solina, Vittorio Solis, Adriano O. University of Calabria DIMEG Via P. Bucci CS Rende87036 Italy University of Salento Lecce73100 Italy York University School of Administrative Studies TorontoONM3J 1P3 Canada

ISBN: (纸本)9791281988019

In modern industry, the focus is shifting towards Industry 5.0, which balances technology and humanity, putting workers' well-being at the forefront. This study explores the impact of emotional states on work performance through simulation, focusing on task execution times. A simulation model is developed that integrates emotional state data into production simulations. The case study analyzes a tuna processing manufacturing system, evaluating the effect of operators' emotional states on two key performance indicators. The results show a clear relationship between emotional states and performance, with positive emotions improving operational efficiency and negative emotions decreasing it. This innovative approach can transform human factors management in manufacturing settings, improving both efficiency and worker well-being. © 2024 The Authors.

关键词： Production efficiency

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Analyze the encryption and decryption methods using the Catalan sequence 38

Analyze the encryption and decryption methods using the Cata...

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38th ECMS international conference on modelling and simulation, ECMS 2024

作者： Zdanski, Maciej Walusiak, Lukasz Rylko, Natalia Faculty of Computer Science and Telecommunications Cracow University of Technology Poland Faculty of Architecture Civil Construction and Applied Arts Academy of Silesia Poland

This paper concerns the project and implementation of a cryptographic tool based on the Catalan sequence. It explains the beginnings of cryptography and how people’s approach to transmitting messages has changed over the years. With the development of society, the need to conceal the meaning of messages from unauthorized individuals has grown. The paper addresses the issue of symmetric affine cipher, its complexity, and the secure transmission of the secret key through individuals using the tool. The key can be entered by the user-sender or generated automatically using the Catalan sequence. In contemporary times, the issue of secure data transmission, and consequently the appropriate methods of encryption and decryption, is crucial. The presented actions not only show an analysis of the methods but also the implementation of these as a functioning tool. ©ECMS Daniel Grzonka, Natalia Rylko, Grazyna Suchacka, Vladimir Mityushev (Editors) 2024.

关键词： Cryptography

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Enhancing simulation Capabilities Through the Integration of Discrete Event simulation and Virtual Reality 23

Enhancing Simulation Capabilities Through the Integration of...

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23rd international conference on modelling and applied simulation, MAS 2024

作者： Jabbour, Joseph Possik, Jalal Yaacoub, Charles Araghi, Sina Namaki Gorecki, Simon Zacharewicz, Gregory Solis, Adriano O. ICL Junia Université Catholique de Lille LITL LilleF-59000 France Laboratoire des Sciences des Risques IMT Mines Alès Alès30100 France Tarbes France University of Bordeaux CNRS IMS UMR 5218 Talence33405 France School of Administrative Studies York University TorontoONM3J 1P3 Canada

ISBN: (纸本)9791281988019

This paper explores the integration of Discrete Event simulation (DES) and Virtual Reality (VR) technologies, focusing on JaamSim and Unity. By combining the strengths of both, we aim to enhance simulation capabilities across various domains. The integration leverages the High-Level Architecture (HLA) IEEE standard to address interoperability and synchronization challenges. This approach mitigates resource consumption issues seen in traditional methods that rely on extensive data transfers, which are dependent on network and server performance. Our integrated system provides an immersive and interactive environment that improves user engagement and decision-making. It allows trainees to better understand complex processes through hands-on VR experiences and enables decision-makers to visualize the impacts of different strategies in real-time. This approach maintains a constant rate of messages per client cycle, irrespective of the simulation length, unlike previous methods that heavily depended on the process duration. © 2024 The Authors.

关键词： Virtual environments

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modelling MICROBIAL INACTIVATION BY RADIO FREQUENCY HEATING: HANDLING VARIATION IN PROCESSING TEMPERATURES 13th

MODELLING MICROBIAL INACTIVATION BY RADIO FREQUENCY HEATING:...

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13th international conference on simulation and modelling in the Food and Bio-Industry, FOODSIM 2024

作者： Verheyen, Davy Tonti, Maria Akkermans, Simen Kozak, Dmytro Skåra, Torstein Van Impe, Jan F. M. KU Leuven BioTeC+ Chemical and Biochemical Process Technology and Control Gebroeders de Smetstraat 1 GhentB-9000 Belgium Physico-Technological Institute of Metals and Alloys of the National Academy of Sciences of Ukraine 34/1 Acad. Vernadskogo Boul Kiev03142 Ukraine Nofima P.O. Box 8034 Stavanger4068 Norway

ISBN: (纸本)9789492859297

modelling microbial inactivation during radio frequency (RF) heating of food products has been proven challenging due to the significant variability in temperature profiles among RF processing runs. A specifically-tailored approach to take into account temperature profiles for the temperature-dependent inactivation is necessary. The current study assesses different mathematical modelling approaches for their suitability to handle this temperature variation, using the inactivation of Salmonella Typhimurium in a liquid dairy system as a case study. Assessment was conducted based mainly on the Akaike Information Criterion. For the approach that utilises an average temperature profile over all treatments, a log-linear inactivation model (applied only to the log linear part of the data) was the most parsimonious. For the approach that takes all temperature profiles into account separately, the log linear model with constant tail was the most parsimonious. Finally, when comparing the average temperature and multiple temperature approach, the former resulted in lower uncertainty on estimated model parameters, while the latter resulted in the most parsimonious models. © 2024, EUROSIS-ETI. All rights reserved.

关键词： Radio waves

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modelling of Frequency Dependence in Self-Rectifying Analog BiFeO3 Memristors 31

Modelling of Frequency Dependence in Self-Rectifying Analog ...

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31st conference on Electronics Circuits and Systems

作者： Zhao, Xianyue Ascoli, Alon Demirkol, Ahmet Samil Messaris, Ioannis Polian, Ilia Tetzlaff, Ronald Du, Nan Friedrich Schiller Univ Jena Inst Solid State Phys Jena Germany Leibniz Inst Photon Technol Dept Quantum Detect Jena Germany Politecn Torino Dept Elect & Telecommun Turin Italy Tech Univ Dresden Inst Circuits & Syst Dresden Germany Univ Stuttgart Inst Comp Sci & Comp Engn Stuttgart Germany

ISBN: (纸本)9798350377217;9798350377200

Memristors, recognized as the fourth fundamental circuit element, exhibit highly nonlinear dynamic behavior, analog computing capabilities, and significant potential for chaotic systems and complex dynamics. Self-rectifying analog BiFeO3 (BFO) memristors, with their high on/off ratio, excellent retention, and remarkable endurance, are particularly promising for these applications. In this work, we present the first demonstration of frequency-dependent measurements on BFO memristors. Our results reveal that the on/off ratio of hysteresis in I-V characteristics and the maximum current in the positive bias range significantly decrease with increasing frequency. We formulated a simplified mathematical model of BFO behavior, based on an exponential ionic drift model for the positive bias region and a diffusion/diode-like I-V behavior for the negative bias region, ensuring high simulation speed while achieving substantial agreement with experimental data. By adjusting model parameters to account for higher amplitudes, we achieved improved alignment with experimental data. Future work will focus on refining the model to better accommodate these dynamic processes and further exploring the relationship between applied bias magnitude and device performance, enhancing the predictive dynamical behavior of BFO memristive devices in practical applications.

关键词： Memristors

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