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Advanced Textbooks in Control and Signal Processing 2019年 xi-xiii页

作者： Keviczky, László Bars, Ruth Hetthéssy, Jenő Bányász, Csilla Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

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Examination of the welding processes when welding of steel in protective gas atmosphere of gases with the application of modeling and numerical simulation

Examination of the welding processes when welding of steel i...

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International Conference on Material Science and Engineering Technology, ICMSET 2016

作者： Kravarikova, Helena Faculty of Materials Science and Technology in Trnava Institute of Applied Informatics Automation and Mechatronics Paulínska 16 Trnava917 24 Slovakia

ISBN: (纸本)9783035710335

Modelling and numerical simulation of technological welding processes is the creative experimental method. Simulation replaces a real system computer model. To create the model can be applied to many experiments under predetermined conditions and analysis of the results. The results can be optimized and implemented to a real system. In a relatively short time, it is possible to solve complex processes occurring in the melting phase of the welding process, using the most advanced computer technology. Appropriately selected algorithm of model experiments can help study the course of temperature fields and formation of stresses and strains in solving the problems in the field of welding. The result of thermal and structural tasks of numerical simulation using FEM are the temperature fields, stress fields and strain generated in the process of welding and welded parts during cooling. Procedure of solving the tasks can be applied to any weld shape and any material of welded parts. The results published in the paper were obtained by solving the thermal and stressstrain tasks in the ANSYS program. Modelling and numerical simulation open possibilities for the three dimensional analysis of the phenomena studied. Based on the development of numerical methods and their application, it is possible to create computational models. Their implementation in software systems opens new possibilities for the area of numerical simulation of technological welding processes. The paper described simulation fillet and butt weld made of stainless steel 17242. © 2017 Trans Tech Publications.

关键词： Strain

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Retraction Note: An architecture of agent-based multi-layer interactive e-learning and e-testing platform

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Quality & Quantity 2019年第1期54卷 189-190页

作者： Muhammad Arif Manzoor Illahi Ahmad Karim Shahaboddin Shamshirband Khubaib Amjad Alam Shahid Farid Salman Iqbal Zolkepli Buang Valentina Emilia Balas Faculty of Computer Science and Information Technology University of Malaya Kuala Lumpur Malaysia Department of Computer Science COMSATS Institute of Information Technology Islamabad Islamabad Pakistan Faculty of Computer Science and Information Technology Department of Computer System and Technology University of Malaya Kuala Lumpur Malaysia Department of Computer Science Chalous Branch Islamic Azad University (IAU) Chalous Iran Universiti Teknikal Malaysia Melaka Durian Tunggal Malaysia Department of Automation and Applied Informatics University of Arad Arad Romania

The Editor-in-Chief has retracted this article.

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Efficient Coupling Interfaces in Photonic Systems Enabled by Printed Freeform Micro-Optics

Efficient Coupling Interfaces in Photonic Systems Enabled by...

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International Conference on Transparent Optical Networks

作者： C. Koos W. Freude S. Randel P.-I. Dietrich M. Blaicher Y. Xu M. R. Billah T. Hoose M. Trappen A. Hofmann Institute of Photonics and Quantum Electronics (IPQ) Karlsruhe Institute of Technology (KIT) Karlsruhe Germany Institute of Microstructure Technology (IMT) Karlsruhe Inst. of Technology (KIT) Eggenstein-Leopoldshafen Germany Institute for Automation and Applied Informatics (IAI) Karlsruhe Institute of Technology (KIT) Eggenstein-Leopoldshafen Germany

In this presentation, we give an overview of our recent progress in exploiting direct-write two-photon lithography for additive 3D fabrication of freeform micro-optical elements. These elements can be printed with highest precision in direct contact with the facets of photonic integrated circuits or optical fibers, thereby greatly simplifying alignment and improving coupling efficiency. The approach offers new perspectives for a wide variety of applications, ranging from advanced photonic multi-chip modules for high-speed communications and optical sensing to highly efficient astro-photonic systems. We are currently working on transferring the concept from laboratory demonstrations to industrial manufacturing.

关键词： Photonics Silicon Wires Optical fiber communication Optical fibers Couplings Bonding

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Flow-based analysis of storage usage in a low-carbon European electricity scenario

arXiv

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arXiv 2018年

作者： Tranberg, Bo Schäfer, Mirko Brown, Tom Hörsch, Jonas Greiner, Martin Department of Engineering Aarhus University Aarhus C8000 Denmark Danske Commodities A/S Aarhus C8000 Denmark Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Germany Frankfurt Institute for Advanced Studies Frankfurt am Main60438 Germany

The application of the flow tracing method to power flows in and out of storage units allows to analyse the usage of this technology option in large-scale interconnected electricity systems. We apply this method to a data-driven model of the European electricity network, which uses a techno-economic optimisation to determine generation and storage capacities and dispatch, assuming a 95% reduction of CO2emission compared to 1990 levels. A flow-based analysis of the power inflow into the different storage technologies confirms the intuition that longerterm hydrogen storage is mainly utilised for wind, whereas shortterm battery storage mostly receives inflow from solar power generation. The usage of storage technologies in general shows a local-but-global behaviour: Whereas on average the power outflow from these capacities is predominantly consumed locally inside the same node, when exported it is also transmitted over long distances as a global flexibility option for the entire system. Copyright © 2018, The Authors. All rights reserved.

关键词： Solar power generation

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A Generic and Highly Scalable Framework for the automation and Execution of Scientific Data Processing and Simulation Workflows

A Generic and Highly Scalable Framework for the Automation a...

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Working IEEE/IFIP Conference on Software Architecture

作者： Jianlei Liu Eric Braun Clemens Düpmeier Patrick Kuckertz D. Severin Ryberg Martin Robinius Detlef Stolten Veit Hagenmeyer Institute for Automation and Applied Informatics (IAI) Karlsruhe Institute of Technology (KIT) Eggenstein-Leopoldshafen Germany Institute of Electrochemical Process Engineering (IEK-3) Forschungszentrum Jiilich. GmbH Jiilich Germany Chair of Fuel Cells Forschungszentrum Jiilich. GmbH Jiilich Germany

ISBN: (数字)9781538663981

ISBN: (纸本)9781538663998

In order to perform complex data processing and co-simulation workflows for research on data driven energy systems, a generic, modular and highly scalable process operation framework is presented in this article. This framework consistently applies web technologies to build up a microservices architecture. It automates the startup, synchronization, and management of scientific data processing and simulation tools (e.g. Python, Matlab, OpenModelica) as part of larger transdisciplinary, multi-domain data processing and co-simulation workflows. It uses container virtualization on the underlying cluster computing environment to control and manage different simulation *** the framework's processing workflow, software executables can be distributed to different nodes on the cluster, easily access data and communicate with other components via communication adapters and a high-performance messaging channel infrastructure. By integrating Apache NiFi, the framework also provides an easy-to-use web user interface to allow users to model, perform and operate workflows for future energy system solutions. As soon as a complex workflow is set up in the process operation framework, researchers can use the workflow without any setup or configuration on their local workstations and without knowing any details of the underlying infrastructure or software environment.

关键词： Computational modeling Containers Data models Virtualization Computer architecture Big Data

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Evaluation of Human Postural System Dynamical Behavior via Developed Statokinesigram Trajectory

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IFAC-PapersOnLine 2017年第1期50卷 15062-15067页

作者： Barbolyas, B. Suttova, K. Vachalek, J. Belavy, C. Hucko, B. Dedik, L. Institute of automation measurement and applied informatics Faculty of Mechanical Engineering STU in Bratislava Nam. slobody 17 Bratislava812 31 Slovakia Laboratory of motor control Institute of Normal and Pathological Physiology Slovak Academy of Sciences Sienkiewiczova 1 Bratislava813 71 Slovakia Institute of applied mechanics and mechatronics Faculty of Mechanical Engineering STU in Bratislava Nam. Slobody 17 Bratislava812 31 Slovakia

Presented study deals with the formulation of a model of the postural system behavior in the form of transfer function derived from Development Statokinesigram Trajectory (DST). As compared with statokinesigram, a DST shows a minimal signs of chaotic behavior while it takes anteroposterior and mediolateral postural sway direction into account together. Proposed method provides an alternative approach to established methodology based on the Center of Pressure (CoP) in evaluating the autoregulation control process in humans. For demonstration of DST application, CoP signals of young and healthy participants without and with bilateral vibration stimulus located on Achilles tendons were registered. Data analysis involves DST construction and numerical parameter estimation of the proposed model. Quadratic criterion showed that there is a disproportion between actual and mean DST time profile that was proposed as a sensitive parameter of posture control quality in all tested subjects in quiet stance condition. © 2017

关键词： Quality control Tendons Biomedical systems Biosignals Center of pressure interpretation Model formulation Postural system

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Optimal Power Flow Subject to Non-Gaussian Stochastic Uncertainties: An L2-based Approach

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PAMM 2018年第1期18卷

作者： Tillmann Mühlpfordt Timm Faulwasser Veit Hagenmeyer Institute for Automation and Applied Informatics (IAI) Karlsruhe Institute of Technology (KIT) Germany

The optimal power flow (OPF) problem—i.e., the task to minimize power system operation costs while maintaining technical and network limitations—is key for the operational planning of power systems. The influx of inherently volatile renewable energy sources calls for methods that allow to consider stochasticity directly in the OPF problem. Modeling uncertainties as second-order continuous random variables, the OPF problem subject to stochastic uncertainties can be posed as an infinite-dimensional L 2 -problem. A tractable and exact reformulation thereof can be obtained using polynomial chaos expansion, under mild assumptions. Polynomial chaos as such is a Hilbert space series expansion for random variables that is frequently employed for uncertainty propagation and uncertainty quantification. Polynomial chaos offers several advantages for OPF subject to stochastic uncertainties. For example, multivariate non-Gaussian uncertainties can be considered straightforwardly. Also, the solutions from polynomial chaos are effectively feedback laws in terms of the realizations of the uncertainty that are determined in a single numerical run.

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Feedback, Dynamics, and Optimal Control in Climate Economics⋆

arXiv

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arXiv 2018年

作者： Kellett, Christopher M. Weller, Steven R. Faulwasser, Timm Grüne, Lars Semmler, Willi School of Electrical Engineering and Computing University of Newcastle CallaghanNSW2308 Australia Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Eggenstein-Leopoldshafen76344 Germany Mathematisches Institut Universität Bayreuth Bayreuth95440 Germany New School for Social Research New York United States University of Bielefeld Germany International Institute for Applied Systems Analysis Laxenburg Austria

For his work in the economics of climate change, Professor William Nordhaus was a co-recipient of the 2018 Nobel Memorial Prize for Economic Sciences. A core component of the work undertaken by Nordhaus is the Dynamic Integrated model of Climate and Economy, known as the DICE model. The DICE model is a discrete-time model with two control inputs and is primarily used in conjunction with a particular optimal control problem in order to estimate optimal pathways for reducing greenhouse gas emissions. In this paper, we provide a tutorial introduction to the DICE model and we indicate challenges and open problems of potential interest for the systems and control community. Copyright © 2018, The Authors. All rights reserved.

关键词： Economics

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Counter-intuitive behaviour of energy system models under CO2caps and prices

arXiv

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arXiv 2018年

作者： Weber, Juliane Heinrichs, Heidi Ursula Gillessen, Bastian Schumann, Diana Horsch, Jonas Brown, Tom Witthaut, Dirk Forschungszentrum Julich Institute for Energy and Climate Research-Systems Analysis and Technology Evaluation Julich52428 Germany University of Cologne Institute for Theoretical Physics Zulpicher Str. 77 Cologne50937 Germany Frankfurt Institute for Advanced Studies Frankfurtam Main60438 Germany Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Eggenstein76344 Germany

The mitigation of climate change requires a fundamental transition of the energy system. Aordability, reliability and the reduction of greenhouse gas emissions constitute central but often conicting targets for this energy transition. Against this context, we reveal limitations and counter-intuitive results in the model-based optimization of energy systems, which are often applied for policy advice. When system costs are minimized in the presence of a CO2cap, effciency gains free a part of the CO2cap, allowing cheap technologies to replace expensive low-emission technologies. Even more striking results are observed in a setup where emissions are minimized in the presence of a budget constraint. Increasing CO2prices can oust clean, but expensive technologies out of the system, and eventually lead to higher emissions. These effects robustly occur in models of different scope and complexity. Hence, extreme care is necessary in the application of energy system optimization models to avoid misleading policy advice. Copyright © 2018, The Authors. All rights reserved.

关键词： Greenhouse gases

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