检索结果-内蒙古大学图书馆

Real-Time Simulation Technologies for Power systems Design, Testing, and Analysis

IEEE Power and Energy Technology systems Journal 2015年第2期2卷 63-73页

作者： Faruque, M.O. Strasser, T. Lauss, G. Jalili-Marandi, V. Forsyth, P. Dufour, C. Dinavahi, V. Monti, A. Kotsampopoulos, P. Martinez, J.A. Strunz, K. Saeedifard, M. Wang, X. Shearer, D. Paolone, M. Brandl, R. Matar, M. Davoudi, A. Iravani, R. Center for Advanced Power Systems Department of Electrical and Computer Engineering Florida State University TallahasseeFL32310 United States Electric Energy Systems-Energy Department AIT Austrian Institute of Technology Vienna1220 Austria OPAL-RT Technologies Inc. MontrealQCH3K 1G6 Canada RTDS Technologies Inc. WinnipegMBR3T 2E1 Canada University of Alberta EdmontonABT6G 2R3 Canada E.ON Energy Research Center Institute for Automation of Complex Power Systems RWTH Aachen University Aachen52062 Germany School of Electrical and Computer Engineering National Technical University of Athens Athens161 21 Greece Departament d'Enginyeria Elèctrica Universitat Politècnica de Catalunya Barcelona08034 Spain Fakultät Elektrotechnik und Informatik Technische Universität Berlin Berlin10587 Germany School of Electrical and Computer Engineering Georgia Institute of Technology AtlantaGA30332 United States Department of Electronics Carleton University OttawaONK1S 5B6 Canada ABB Power Systems Ludvika771 80 Sweden Swiss Federal Institute of Technology of Lausanne Lausanne1015 Switzerland Fraunhofer Institute for Wind Energy and Energy System Technology Kassel34119 Germany Centre of Applied Power Electronics University of Toronto TorontoONM5S 2J7 Canada Department of Electrical Power and Machines Ain Shams University Cairo11566 Egypt Department of Electrical Engineering University of Texas at Arlington ArlingtonTX76019 United States

This task force paper summarizes the state-of-the-art real-time digital simulation concepts and technologies that are used for the analysis, design, and testing of the electric power system and its apparatus. This paper highlights the main building blocks of the real-time simulator, i.e., hardware, software, input-output systems, modeling, and solution techniques, interfacing capabilities to external hardware and various applications. It covers the most commonly used real-time digital simulators in both industry and academia. A comprehensive list of the real-time simulators is provided in a tabular review. The objective of this paper is to summarize salient features of various real-time simulators, so that the reader can benefit from understanding the relevant technologies and their applications, which will be presented in a separate paper. © 2015 IEEE.

关键词： Real time systems

来源：评论

学校读者我要写书评

暂无评论

Best-Practice Piloting Based on an Integrated Social Media Analysis and Visualization for E-Participation Simulation in Cities

引用

Procedia Computer Science 2015年 75卷 66-74页

作者： Dirk Burkhardt Kawa Nazemi Egils Ginters Fraunhofer IGD Fraunhoferstr. 5 64283 Darmstadt Germany TU Darmstadt Fraunhoferstr. 5 64283 Darmstadt Germany Sociotechnical Systems Engineering Institute Vidzeme University of Applied Sciences Cesu Street 4 LV- 4201 Valmiera Latvia

E-Participation and the engagement of citizens in politics are on the agenda in many countries. Therefore, a number of project and programs were initiated that aim at finding creative and effective solutions for involving citizens. One intended aspect is the provision of transparency that enables citizens to analyze socio-economical indicators and serves as basement for initial data storing for e-participation scenarios simulation. A beyond going step is to consider citizens’ opinions in the policy making process. Unfortunately this will only be possible; if a significant number of citizens know what concrete aspect should be realized. The growth and establishment of social media nowadays allow most people to discuss political ideas and critics virtually and anonymously achieving higher credibility of the data usable for policy making. However, the major barrier is the different topical languages, the representatives’ role and weak visualization of the results. This article dealt with a best-practice piloting approach for discussing and realizing innovative solutions with a variety of stakeholders from different domains. The core of this paper is how to deal and manage the different perspective on development process, to aim on designing a common set of requirements and development procedure. The methodology is practically and beneficial applied as social media integration solution in the EC FP7 FUPOL research project.

关键词： Policy making and simulation semantic visualization e-participation

来源：评论

学校读者我要写书评

暂无评论

Semantics Visualization – Definition, Approaches and Challenges

引用

Procedia Computer Science 2015年 75卷 75-83页

作者： Kawa Nazemi Dirk Burkhardt Egils Ginters Jorn Kohlhammer Fraunhofer IGD Fraunhoferstr. 5 64283 Darmstadt Germany TU Darmstadt Fraunhoferstr. 5 64283 Darmstadt Germany Sociotechnical Systems Engineering Institute Vidzeme University of Applied Sciences Cesu Street 4 LV- 4201 Valmiera Latvia

The visualization of the simulation results must be done in conformity with beneficiaries perception and professional domain understanding. It means that right data must be identified before. Semantic technologies provide new ways for accessing data and acquiring knowledge. The underlying structures allow finding information easier, gathering meanings and associations of the data entities and associating the data to users’ knowledge. Even though the focus of the research in this area is more to provide “machine readable” data, human-centered systems benefit from the technologies too. Especially graphical representations of the semantically structured data play a key-role in today's research. The meaningful relations of data entities and the meaningful and labeled clustering of data in form of semantic concepts enable new ways to visualize data. With these new ways, various challenges are related with deploying semantics visualizations beyond analytical search and simulation. The goal is to give a common understanding of the term semantics as it is used in semantic web. This paper dealt with the general idea of semantics visualization. First a short introduction to semantic formalisms is given followed by a general definition. Subsequently approaches and techniques of existing semantics visualizations are presented, where-as a new classification is introduced to describe the techniques. The article concludes with future challenges in semantics visualization focusing on users, data and tasks.

关键词： Visualization and virtualization simulation semantic visualization

来源：评论

学校读者我要写书评

暂无评论

Comparison of Two Different (Quasi-) Dynamic Testing Methods for the Performance Evaluation of a Linear Fresnel Process Heat Collector

引用

Energy Procedia 2015年 69卷 84-95页

作者： A. Hofer D. Büchner K. Kramer S. Fahr A. Heimsath W.J. Platzer S. Scholl Scientific Researcher Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstr. 2 79110 Freiburg Germany Prof. Dr.-Ing. Head of Institute for Chemical and Thermal Process Engineering ICTV Technical University Braunschweig Langer Kamp 7 38106 Braunschweig Germany

A small-scale Linear Fresnel Collector (LFC) for the generation of process heat has been tested by fraunhofer ISE;its performance was evaluated by means of two different methods. The first is a quasi-dynamic testing method performed according to the testing standard ISO 9806:2013, with modificationsin the model to accurately describe LFCs. Due to the two-dimensional Incidence Angle Modifier (IAM) of an LFC, an iterative multi-linear regression (MLR)approach has been developed to be able to comprehensively evaluate the optical performance. The second method is a dynamic testing method based on a parameter identification incorporating a multi-node/plug-flow collector model without strict restraints on mass flow and inlet temperature stability. Both methods are briefly described in their conceptual design and theirbasic requirements, revealing their similarities and differences. Each method is then applied to real measurement datafrom an LFC, assessing practicability and identification accuracy. For both methods, the mean absolutedifferencebetween identifiedIAM values and results from ray tracing fell in a range of 0.013-0.017, leading toa similar accuracy inLFC performance evaluation. Differences in optical efficiency between the two methodsare smaller,with anaverage absolutedifferencebelow 0.0098, even whenusing different measurement data and simulation models. Thus the dynamic methodrepresents a good starting point for the further development of an alternative dynamic testing and evaluation method with more flexibility than the current testing standard. This will be significantwhenevaluating large-scale concentrating collectors and collectors with direct steam generation.

关键词： Linear Fresnel collector performance evaluation parameter indentification method process heat collector multi-linear regression least-square algorithm

来源：评论

学校读者我要写书评

暂无评论

Quantification of Front Side Metallization Area on Silicon Wafer Solar Cells for Background Plating Detection

引用

Energy Procedia 2015年 77卷 717-724页

作者： Martin Heinrich Achim Kraft Martin Lieder Bram Hoex Armin G. Aberle Markus Glatthaar Now at Department of Microsystems Engineering – IMTEK University of Freiburg Georges-Köhler-Allee 106 79110 Freiburg Germany Fraunhofer Institute for Solar Energy Systems Heidenhofstr. 2 79110 Freiburg Germany Now at School of Photovoltaic and Renewable Energy Engineering University of New South Wales Kensington NSW 2052 Australia Solar Energy Research Institute of Singapore National University of Singapore 7 Engineering Drive 1 Block E3A Singapore 117574 Singapore

This work describes a method to measure the metallized area on the front side of silicon wafer solar cells. The method is especially applicable to detect and quantify background plating, which can occur in the production of solar cells with plated front-side metallization. The metallized area of plated solar cells is determined by an image processing algorithm (“MetDetect”) using images of the solar cell front side obtained by a simple commercially available flatbed scanner. The algorithm is verified by the comparison of scanned images from test samples with microscope images. Furthermore a correlation of the metallized area with the measured short-circuit current density of the samples justifies the proposed method. With “MetDetect” a precise quantification of the background plating on the plated solar cell front side can be realized. It is suitable for inline inspection in solar cell production or quantification of pinholes and cracks in the surface dielectric. In this work “MetDetect” is applied to corroborate the observation that background plating of solar cells with a nickel copper front side metallization can surprisingly be removed during plating by a thin Sn-capping.

关键词： Front side metallization Light induced plating Background plating Nickel Copper Tin Shading Metallized area

来源：评论

学校读者我要写书评

暂无评论

Bimanual robot manipulation and packaging of shoes in footwear industry 1

Bimanual robot manipulation and packaging of shoes in footwe...

引用

ROBOT 2013: 1st Iberian Robotics Conference

作者： Morales, Ricardo Badesa, Francisco J Aracil, Nicolás García Bormann, Richard Fischer, Jan Graf, Birgit Department of Systems Engineering and Automatic Control Miguel Hernandez University Spain Fraunhofer Institute for Manufacturing Engineering and Automation IPA Germany

ISBN: (纸本)9783319034126

The present paper presents the ongoing research undertaken as a research experiment, called HERMES, inside Echord european integrated project framework. The goal of the HERMES experiment is to study, analyze and finally implement the packaging of shoes on a robot system that mimics the required degree of flexibility and dexterity provided by the human workers. The use of a bimanual system with anthropomorphic hands has been chosen as it could also be applied to solve other processes of similar or even higher complexity in the future and thus provide a holistic approach towards automization in footwear industry. In this paper, the first experimental results of the HERMES experiment are presented. © Springer International Publishing Switzerland 2014

关键词： Computer vision

来源：评论

学校读者我要写书评

暂无评论

Extended Heat Loss and Temperature Analysis of Three Linear Fresnel Receiver Designs

引用

Energy Procedia 2015年 69卷 424-433页

作者： A. Hofer F. Cuevas A. Heimsath P. Nitz W.J. Platzer S. Scholl Scientific Researcher Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstr. 2 79110 Freiburg Germany. Prof. Dr.-Ing. Head of Institute for Chemical and Thermal Process Engineering ICTV Technical University Braunschweig Langer Kamp 7 38106 Braunschweig Germany.

Heat loss prediction models for parabolic trough receivers do not consider the thermal effect of a secondary mirror. As an extension a Thermal Resistance Model (TRM) has been developed at fraunhofer ISE for the prediction of the heat loss of three different Linear Fresnel Collector (LFC) receiver configurations. In previous investigations we have found the energy balance of a LFC receiver to be strongly influenced by the amount of solar radiation absorbed by the secondary mirror. This absorption provokes an increase of temperature of the secondary mirror and hence a decrease in the total amount of heat loss of a LFC. The size of this effect depends on the receiver geometry and diverse ambient parameters. Investigated parameters are wind velocity, ambient temperature and Direct Normal Irradiance (DNI). This dependency and its effect on heat loss and secondary mirror temperatures are analyzed for three different LFC receiver configurations. As the radiation absorbed by the secondary mirror is affected by the aperture area of the LFC, studies are performed for small-scale and for large-scale collectors.

关键词： Linear Fresnel Receiver Heat Loss Secondary Mirror Temperatures Ambient Parameter Study

来源：评论

学校读者我要写书评

暂无评论

Process Variations and Probabilistic Integrated Circuit Design

引用

2014年

作者： Manfred Dietrich Joachim Haase

ISBN: (纸本)9781489988607

Uncertainty in key parameters within a chip and between different chips in the deep sub micron area plays a more and more important role. As a result, manufacturing process spreads need to be considered during the design process. Quantitative methodology is needed to ensure faultless functionality, despite existing process variations within given bounds, during product development. This book presents the technological, physical, and mathematical fundamentals for a design paradigm shift, from a deterministic process to a probability-orientated design process for microelectronic circuits. Readers will learn to evaluate the different sources of variations in the design flow in order to establish different design variants, while applying appropriate methods and tools to evaluate and optimize their design.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The LRP toolbox for artificial neural networks

The Journal of Machine Learning Research

引用

The Journal of Machine Learning Research 2016年第1期17卷

作者： Kevin Murphy Bernhard Schölkopf Sebastian Lapuschkin Alexander Binder Grégoire Montavon Klaus-Robert Müller Wojciech Samek Google MPI for Intelligent Systems Fraunhofer Heinrich Hertz Institute Video Coding and Analytics Berlin Germany Singapore University of Technology ISTD Singapore Berlin Institute of Technology Machine Learning Group Berlin Germany Berlin Institute of Technology Machine Learning Group Berlin Germany and Korea University Department of Brain and Cognitive Engineering Seoul Korea

The Layer-wise Relevance Propagation (LRP) algorithm explains a classifier's prediction specific to a given data point by attributing relevance scores to important components of the input by using the topology of the learned model itself. With the LRP Toolbox we provide platform-agnostic implementations for explaining the predictions of pretrained state of the art Caffe networks and stand-alone implementations for fully connected Neural Network models. The implementations for Matlab and python shall serve as a playing field to familiarize oneself with the LRP algorithm and are implemented with readability and transparency in mind. Models and data can be imported and exported using raw text formats, Matlab's .mat files and the .npy format for numpy or plain text.

关键词： artificial neural networks computer vision deep learning explaining classifiers layer-wise relevance propagation

来源：评论

学校读者我要写书评

暂无评论

Integrated Requirements and systems Modeling in the Mechatronic Development Process

Integrated Requirements and Systems Modeling in the Mechatro...

引用

International Conference on Developments in esystems engineering (DESE)

作者： Christoph Richter Georg Hackenberg Michael F. Zäh Gunther Reinhart Fraunhofer Institute for Machine Tools and Forming Technology Augsburg Germany Software & Systems Engineering Technische Universität München München Germany Institute for Machine Tools and Industrial Management Technische Universität München München Germany

Manufacturing systems continuously increase in complexity due to higher customer expectations regarding their purpose and flexibility of use. In addition, the growing meaning of electronic and software components in manufacturing systems complicates the engineering since the interaction of different disciplines leads to increasing coordination efforts and problems regarding the interfaces between these disciplines. For these reasons, development processes in this context need to be adapted continuously to the present situation. To face these challenges, the suitable handling of arising requirements is one key factor for the success of engineering processes. Therefore, a modeling technique for an integrated requirements and systems modeling in the mechatronic development process is presented in this paper. After a summary of approaches for model-based development and requirements engineering in the context of mechatronic systems, the modeling technique is illustrated on a meta-model level. To demonstrate the feasibility, the proposed approach is applied to a miniaturized packaging machine, which is currently developed at the institute for Machine Tools and Industrial Management (iwb) of Technische Universit München for benchmarking engineering methods and tools. Excerpts of this application are outlined in this paper as well as the results of a discussion with experts from the machine tools industry regarding the presented modeling approach. Finally, an outlook with respect to possible enhancements of the modeling technique is given.

关键词： Mechatronics Object oriented modeling Unified modeling language Requirements engineering Analytical models Software

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：