检索结果-内蒙古大学图书馆

CIRED 2024 Vienna Workshop

作者： Alexandra Karmann Maximilian Kilthau Christian Derksen Florian Strobel Lukas Bittermann Kamil Korotkiewicz Jonas Ostmeyer Alexander Fay Institute of Automation Technology Helmut-Schmidt-University Hamburg Germany Research Group for Business Informatics and Software Engineering University Duisburg-Essen Essen Germany Institute of Electrical Power and Energy Technology University of Technology Hamburg Hamburg Germany PSI GridConnect GmbH Karlsruhe Germany PSI FLS Fuzzy Logik & Neuro Systeme GmbH Dortmund Germany

ISBN: (数字)9781837241224

This paper introduces an innovative conceptual framework for an Energy Internet of Things (eIoT) platform designed to address challenges related to grid congestion, voltage limit violations, and the growing demands on low-voltage grids due to increased electrification in the energy and heating sectors. The proposed platform seamlessly integrates cutting-edge technologies including advanced data collection, state estimation algorithms, AI-driven decision-making processes, and grid control functionalities. Its primary objective is to facilitate proactive measures aimed at enhancing energy distribution efficiency and effectively managing consumption devices while ensuring compliance with regulatory standards such as §14a of the Energy Industry Act (EnWG) in Germany.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Validation of Digital Twins: Challenges and Opportunities

Validation of Digital Twins: Challenges and Opportunities

引用

Simulation Winter Conference

作者： Edward Y. Hua Sanja Lazarova-Molnar Deena P. Francis The MITRE Corporation McLean VA USA Institute of Applied Informatics and Formal Description Methods Karlsruhe Institute of Technology Karlsruhe GERMANY DTU Compute Technical University of Denmark Kongens Lyngby DENMARK

ISBN: (纸本)9781665476621

Digital twins enjoy increasing interest in a diverse array of industrial sectors, such as manufacturing, healthcare, urban planning, etc. Their usefulness depends on the robustness of the corresponding digital twin models; however, validation of the model, as a mean to ensure models' robustness, is a difficult problem. Moreover, traditional validation approaches need to undergo significant transformation to be made applicable to digital twins. To the best of our knowledge, there has not been a systematic treatment of validating digital twin models. This paper identifies several challenges facing the model validation within digital twins. Furthermore, we propose an initial framework to define basic rules of digital twin model validation and introduce a systematic approach to validation that seamlessly combines expert knowledge and data gathered from available Internet of Things (IoT) devices.

关键词： Uncertainty Systematics System dynamics Sensitivity analysis Urban planning Transfer learning Data models

来源：评论

学校读者我要写书评

暂无评论

Statistical analysis of Discrete Dislocation Dynamics simulations: initial structures, cross-slip and microstructure evolution

arXiv

引用

arXiv 2023年

作者： Demirci, Aytekin Steinberger, Dominik Stricker, Markus Merkert, Nina Weygand, Daniel Sandfeld, Stefan Forschungszentrum Juelich Juelich Germany Institute of Mechanics and Fluid Dynamics Freiberg University of Mining and Technology Freiberg Germany Interdisciplinary Centre for Advanced Materials Simulation Ruhr-Universität Bochum Bochum Germany Institute of Applied Mechanics Clausthal University of Technology Clausthal-Zellerfeld Germany Institute for Applied Materials Karlsruhe Institute of Technology Karlsruhe Germany RWTH Aachen University Faculty of Georesources and Materials Engineering Materials Data Science and Materials Informatics Aachen Germany

Over the past decades, discrete dislocation dynamics simulations have been shown to reliably predict the evolution of dislocation microstructures for micrometer-sized metallic samples. Such simulations provide insight into the governing deformation mechanisms and the interplay between different physical phenomena such as dislocation reactions or cross-slip. This work is focused on a detailed analysis of the influence of the cross-slip on the evolution of dislocation systems. A tailored data mining strategy using the "discrete-to-continuous (D2C) framework" allows to quantify differences and to quantitatively compare dislocation structures. We analyze the quantitative effects of the cross-slip on the microstructure in the course of a tensile test and a subsequent relaxation to present the role of cross-slip in the microstructure evolution. The precision of the extracted quantitative information using D2C strongly depends on the resolution of the domain averaging. We also analyze how the resolution of the averaging influences the distribution of total dislocation density and curvature fields of the specimen. Our analyzes are important approaches for interpreting the resulting structures calculated by dislocation dynamics simulations. Copyright © 2023, The Authors. All rights reserved.

关键词： Data mining

来源：评论

学校读者我要写书评

暂无评论

Hybrid multi-chip assembly of optical communication engines by in situ 3D nanolithography

引用

Light(Science & Applications) 2020年第1期9卷 1340-1350页

作者： Matthias Blaicher Muhammad Rodlin Billah Juned Kemal Tobias Hoose Pablo Marin-Palomo Andreas Hofmann Yasar Kutuvantavida Clemens Kieninger Philipp-Immanuel Dietrich Matthias Lauermann Stefan Wolf Ute Troppenz Martin Moehrle Florian Merget Sebastian Skacel Jeremy Witzens Sebastian Randel Wolfgang Freude Christian Koos Institute of Photonics and Quantum Electronics(IPQ) Karlsruhe Institute of Technology(KIT)Engesserstraße 576131 KarlsruheGermany Institute for Microstructure Technology(IMT) KITHermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Institute for Automation and Applied Informatics(IAI) KITHermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Vanguard Automation GmbH Gablonzer StraBe 1076185 KarlsruheGermany Fraunhofer Institute for Telecommunications Heinrich Hertz Institute(HHI)Einsteinufer 3710587 BerlinGermany Institute of Integrated Photonics(IPH) RWTH AachenSommerfeldstraße 18/2452074 AachenGermany

Three-dimensional(3D)nano-printing of freeform optical waveguides,also referred to as photonic wire bonding,allows for efficient coupling between photonic chips and can greatly simplify optical system *** a key advantage,the shape and the trajectory of photonic wire bonds can be adapted to the mode-field profiles and the positions of the chips,thereby offering an attractive alternative to conventional optical assembly techniques that rely on technically complex and costly high-precision ***,while the fundamental advantages of the photonic wire bonding concept have been shown in proof-of-concept experiments,it has so far been unclear whether the technique can also be leveraged for practically relevant use cases with stringent reproducibility and reliability *** this paper,we demonstrate optical communication engines that rely on photonic wire bonding for connecting arrays of silicon photonic modulators to InP lasers and single-mode *** a first experiment,we show an eight-channel transmitter offering an aggregate line rate of 448 Gbit/s by low-complexity intensity modulation.A second experiment is dedicated to a four-channel coherent transmitter,operating at a net data rate of 732.7 Gbit/s-a record for coherent silicon photonic transmitters with co-packaged *** dedicated test chips,we further demonstrate automated mass production of photonic wire bonds with insertion losses of(0.7±0.15)dB,and we show their resilience in environmental-stability tests and at high optical *** results might form the basis for simplified assembly of advanced photonic multi-chip systems that combine the distinct advantages of different integration platforms.

关键词： communication lithography bonding

来源：评论

学校读者我要写书评

暂无评论

Predicting the power grid frequency of European islands

arXiv

引用

arXiv 2022年

作者： Onsaker, Thorbjørn Lund Nygård, Heidi S. Gomila, Damià Colet, Pere Mikut, Ralf Jumar, Richard Maass, Heiko Kühnapfel, Uwe Hagenmeyer, Veit Schäfer, Benjamin Faculty of Science and Technology Norwegian University of Life Sciences Ås1432 Norway Campus Universitat Illes Balears Palma de MallorcaE-07122 Spain Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Eggenstein-Leopoldshafen76344 Germany

Modelling, forecasting and overall understanding of the dynamics of the power grid and its frequency are essential for the safe operation of existing and future power grids. Much previous research was focused on large continental areas, while small systems, such as islands are less well-studied. These natural island systems are ideal testing environments for microgrid proposals and artificially islanded grid operation. In the present paper, we utilize measurements of the power grid frequency obtained in European islands: the Faroe Islands, Ireland, the Balearic Islands and Iceland and investigate how their frequency can be predicted, compared to the Nordic power system, acting as a reference. The Balearic islands are found to be particularly deterministic and easy to predict in contrast to hard-to-predict Iceland. Furthermore, we show that typically 2-4 weeks of data are needed to improve prediction performance beyond simple benchmarks. © 2022, CC BY.

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

3Dprinted highly compact varifocal optics

3Dprinted highly compact varifocal optics

引用

Imaging Systems and Applications, ISA 2020 - Part of Imaging and applied Optics Congress 2020

作者： Sieber, Ingo Thelen, Richard Gengenbach, Ulrich Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany Karlsruhe Institute of Technology Institute of Microstructure Technology - KNMF Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany

Surface measurements of a high-resolution 3Dprinted rotation optics are compared to nominal shape to deduce improvements of process parameters. Feeding back the data into the model allows for usage as digital twin for... 详细信息

ISBN: (纸本)9781557528209

关键词： Optimization

来源：评论

学校读者我要写书评

暂无评论

Efficient Time-Delay System Optimization with Auto-Configured Metaheuristics

Efficient Time-Delay System Optimization with Auto-Configure...

引用

IEEE International Conference on Systems, Man and Cybernetics

作者： Roman Senkerik Aleksander Byrski Hubert Guzowski Peter Janku Tomas Kadavy Zuzana Kominkova Oplatkova Radek Matusu Michal Pluhacek Libor Pekar Maciej Smolka Adam Viktorin Department of Informatics and Artificial Intelligence A.I. Lab Faculty of Applied Informatics Tomas Bata University in Zlin Czech Republic Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlin Czech Republic Institute of Computer Science AGH University of Science and Technology Krakow Poland

This paper presents an experimental study that compares the performance of four selected metaheuristic algorithms for optimizing a time delay system model. Time delay system models are complex and challenging to optimize due to their inherent characteristics, such as non-linearity, multi-modality, and constraints. The study includes an explanation of the choice and core functionality of the selected algorithms, which are both baseline and state-of-the-art variants of self-organizing migrating algorithm (SOMA), state-of-the-art variant from the Success-History-based Adaptive Differential Evolution family of algorithms, with emphasis on diverse search (DISH algorithm), and Covariance Matrix Adaptation Evolution Strategy (CMA-ES) algorithm. The hyperparameters of the metaheuristic algorithms were set using the iRace automatic algorithm configuration framework. The paper emphasizes the importance of metaheuristic algorithms in control engineering for time-delay systems to develop more effective and efficient control strategies and precise model identifications. The experimental results highlight the effectiveness of the state-of-the-art algorithms with specific adaptive mechanisms like population organization process, diverse search and adaptation mechanisms ensuring a gradual transition from exploration to exploitation. Overall, this study contributes to understanding the challenges and advantages of using metaheuristic algorithms in control engineering for time delay systems. The results provide valuable insights into the performance of modern metaheuristic algorithms and can help guide the selection of appropriate adaptive mechanisms of metaheuristics.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Analysis for the joining of light alloys by numerical experiment

引用

Materials Science Forum 2020年 994卷 248-255页

作者： Kravarikova, Helena Faculty of Materials Science and Technology in Trnava Institute of Applied Informatics Automation and Mechatronics J.Bottu 25 Trnava917 24 Slovakia

The current paper deals with the application of numerical experiment of joining light alloys. Modelling and numerical simulation and finite element method in the ANSYS program were used to investigate the course of thermal cycles, the joining process of light alloys by welding. Joining process of light alloys by welding is defined as a moving point source of heat, which generates temperature fields of various kinds, depending on the time and thickness of the material being welded. The paper is therefore devoted to: *Thermal energy transfer and solution to differential equation of heat conduction, *Initial and boundary conditions for temperatures distribution of a moving point source of heat, *Generation (definition) of thermal cycle. Another part of the paper deals with the analysis of the heat-affected zone. Of the result of the solution will be expressed as the temperature field generated in the base material during the welding process. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Finite element method

来源：评论

学校读者我要写书评

暂无评论

Dynamic Deployment and Control of an NDN Network for Military Multi-UAVs Based Surveillance Applications

Dynamic Deployment and Control of an NDN Network for Militar...

引用

International Conference on Unmanned Aircraft Systems (ICUAS)

作者： Otávio A. Rocha da Cruz Carlos Eduardo Pereira Antonio Santos da Silva João Paulo J. da Costa Paulo Mendes Edison Pignaton de Freitas Graduate Program in Electrical Engineering Federal University of Rio Grande do Sul Rio Grande do Sul Brazil Institute of Informatics Federal University of Rio Grande do Sul Rio Grande do Sul Brazil Hamm-Lippstadt University of Applied Sciences (HSHL) Hamm Germany Karlsruhe Institute of Technology (KIT) Karlsruhe Germany Airbus Taufkirchen Germany

ISBN: (数字)9798350357882

ISBN: (纸本)9798350357899

The military usage of Unmanned Aerial Vehicles (UAVs) has garnered attention, especially after their employment in the Ukrainian war. Despite the most commented lethal usage, they have many other applications from which surveillance for imagery acquisition is one of primal importance. Using a standalone UAV for this purpose is well-known, but to cope with the scale of battlefield operations, using multi- UAV systems is an asset of great value. However, these systems rely on ad hoc networks that require solutions beyond conventional ones based on the Internet Protocol (IP). This paper addresses this concern by proposing a communication support mechanism for multi-UAV military surveillance systems based on the Information-Centric Networks (ICN) paradigm. The proposed approach consists of the dynamic deployment of an ICN network based on microservices architecture, where the communication services of each UAV are deployed according to their resources. The solution is validated in a simulated battlefield scenario where a surveillance UAV provides data demanded by other nodes. The results demonstrate that the proposed solution minimizes the data delivery delays by successfully deploying the customized set of microservices to support the transmission, even when a UAV with a low battery level is replaced at runtime.

关键词： Military communication Runtime Protocols Surveillance Information-centric networking Microservice architectures Autonomous aerial vehicles

来源：评论

学校读者我要写书评

暂无评论

Digital Twins for Energy-Efficient Manufacturing

Digital Twins for Energy-Efficient Manufacturing

引用

Annual IEEE Systems Conference

作者： Nader Mohamed Sanja Lazarova-Molnar Jameela Al-Jaroodi Department of Computer Science and Information Systems Pennsylvania Western University California PA USA Institute of Applied Informatics and Formal Description Methods Karlsruhe Institute of Technology Karlsruhe Germany Faculty of Engineering University of Southern Denmark Odense Denmark Department of Engineering Robert Morris University Pittsburgh PA USA

Some manufacturing industries consume massive energy for their manufacturing and logistics processes. The costs of manufacturing can increase significantly as the energy cost increases. Such increase amplifies the final cost of the created products on the consumers. This makes finding different approaches that utilize innovative technologies to improve energy efficiency in manufacturing extremely important. This paper investigates how digital twins can be utilized to enable improved energy efficiency in manufacturing. Different applications of digital twins for energy-efficient manufacturing are investigated. In addition, the paper discusses some challenges of utilizing digital twins for this purpose. A framework for utilizing digital twins for energy-efficient manufacturing is also discussed.

关键词： Manufacturing industries Costs Manufacturing processes Buildings Energy efficiency Raw materials Manufacturing

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：