检索结果-内蒙古大学图书馆

arXiv 2024年

作者： Demirel, Gökhan Grafenhorst, Simon Förderer, Kevin Hagenmeyer, Veit The Institute of Automation and Applied Informatics IAI Karlsruhe Institute of Technology Eggenstein-Leopoldshafen76344 Germany

This work analyzes the impact of varying concentrations mini-photovoltaic (MPV) systems, often referred to as balcony power plants, on the stability and control of the low-voltage (LV) grid. By local energy use and potentially reversing meter operation, we focus on how these MPV systems transform grid dynamics and elucidate consumer participation in the energy transition. We scrutinize the effects of these systems on power quality, power loss, transformer loading, and the functioning of other inverter-based voltage-regulating distributed energy resources (DER). Owing to the rise in renewable output from MPVs, the emerging bidirectional energy flow poses challenges for distribution grids abundant with DERs. Our case studies, featuring sensitivity analysis and comparison of distributed and decentralized DER control strategies, highlight that autonomous inverters are essential for providing ancillary services. With the growing use of battery energy storage (BES) systems in LV grids for these services, the need for adaptable DER control strategies becomes increasingly evident. Copyright © 2024, The Authors. All rights reserved.

关键词： Power quality

来源：评论

学校读者我要写书评

暂无评论

Investigation of solution processable moisture barrier films based on a polymer and filler materials

Investigation of solution processable moisture barrier films...

引用

IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)

作者： Zehua Chen Ulrich Gengenbach Shant Gananian Daniel Moser Klaus-Martin Reichert Liane Koker Institute for Automation and Applied Informatics (IAI) Karlsruhe Institute of Technology (KIT) Eggenstein-Leopoldshafen Germany

ISBN: (数字)9798350383263

ISBN: (纸本)9798350383270

Flexible printed electronics (FPE) attract significant interest due to their potential applications, ranging from printed circuits to wearable devices. Encapsulation of FPE devices is crucial to protect them from environmental factors such as moisture and oxygen. Solution-processed encapsulation by incorporating fillers into the polymer matrix is a promising method to produce barrier films on FPE devices. In this work, glass flakes, graphene oxide, montmorillonite, and silica are examined as potential fillers in poly(vinyl alcohol) (PVA). An adapted water vapor transmission rate (WVTR) dry cup method is developed to select the most effective filler. The optimal concentration of the selected fillers in PVA is determined. Moreover, the barrier effect of selected PVA/filler films is validated by resistance measurements of inkjet printed silver tracks subjected to damp heat and room storage conditions.

关键词： Encapsulation Silicon compounds Silver Transmission line matrix methods Films Moisture Sensor systems

来源：评论

学校读者我要写书评

暂无评论

Validation of Digital Twins in Labor-intensive Manufacturing:Significance and Challenges 15

Validation of Digital Twins in Labor-intensive Manufacturing...

引用

15th International Conference on Ambient Systems, Networks and Technologies Networks, ANT 2024 / The 7th International Conference on Emerging Data and Industry 4.0, EDI40 2024

作者： Zare, Ashkan Lazarova-Molnar, Sanja The Maersk Mc-Kinney Moller Institute University of Southern Denmark Campusvej 55 Odense5230 Denmark Institute of Applied Informatics and Formal Description Methods Karlsruhe Institute of Technology Kaiserstr. 89 Karlsruhe76133 Germany

Digital Twins allow for designing, operating, and optimizing running systems by replicating the operations of the physical components in a digital environment. Interconnectivity between Digital Twin models and corresponding real-world counterparts facilitates continuous examining of the actual system, resulting in nearly real-time analysis and decision-making support. Validation is an integral part of Digital Twins as underlying models must accurately reflect the corresponding physical systems according to predefined objectives. The near real-time nature of Digital Twins demands a continuous validation process to ensure models' accuracy. Labor-intensive manufacturing, where humans are at the heart of manufacturing processes, is a sector that encompasses a wide range of industries, from toys and apparel to medical devices and automotive components. This sector continues to play a vital role in emerging economies, offering employment opportunities that mitigate poverty and enhance social stability. Enabling Digital Twins for labor-intensive manufacturing systems opens many opportunities towards humancentricity and improvement of well-being of human operators. In these systems, however, human data must also be considered for Digital Twin development and the corresponding validation processes. Handling human data further complicates the creation and validation of Digital Twins. To the best of our knowledge, there has not been a comprehensive study on the validation of Digital Twins in labor-intensive manufacturing. In this paper, we review Digital Twin validation in manufacturing, focusing on systems that feature data from human operations. As a result, we outline the current challenges of validation of Digital Twins in labor-intensive manufacturing environments and suggest future research directions. © 2024 Elsevier B.V.. All rights reserved.

关键词： Decision making

来源：评论

学校读者我要写书评

暂无评论

Prediction of Fluorescent Ki67 Staining in 3D Tumor Spheroids

Prediction of Fluorescent Ki67 Staining in 3D Tumor Spheroid...

引用

作者： Bruch, Roman Vitacolonna, Mario Rudolf, Rüdiger Reischl, Markus Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Eggenstein-Leopoldshafen Germany Institute of Molecular and Cell Biology Mannheim University of Applied Sciences Mannheim Germany

3D cell culture models are important tools for the development and testing of new therapeutics. In combination with immunoassays and 3D confocal microscopy, crucial information like morphological or metabolic changes can be examined during drug testing. However, a common limitation of immunostainings is the number of dyes that can be imaged simultaneously, as overlaps in the spectral profiles of the different dyes may result in cross talk. We therefore present a 3D deep learning method, able to predict fluorescent stainings of specific antigens on the basis of a nuclei staining. Using the proliferation marker Ki67, we showed that the presented model was able to predict the Ki67 staining with a strong correlation to the real signal. Additional analysis showed, that the model was not relying on signal cross talk. This approach, based on staining of the cell nuclei and subsequent prediction of the target antigen, could reduce the number of parallel antigen stains to a minimum and incompatible staining panels could be circumvented in the future. © 2022 The Author(s), published by De Gruyter.

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

Essential Data Requirements for Industrial Energy Efficiency with Digital Twins: A Case Study Analysis 15

Essential Data Requirements for Industrial Energy Efficiency...

引用

15th International Conference on Ambient Systems, Networks and Technologies Networks, ANT 2024 / The 7th International Conference on Emerging Data and Industry 4.0, EDI40 2024

作者： Khodadadi, Atieh Lazarova-Molnar, Sanja Institute of Applied Informatics and Formal Description Methods Karlsruhe Institute of Technology Kaiserstr. 89 Karlsruhe76133 Germany The Maersk Mc-Kinney Moller Institute University of Southern Denmark Campusvej 55 Odense5230 Denmark

The rapid expansion of industrialization and the increase in energy demand make energy resource management necessary in various industries. Creating digital twins from available streaming data offers a practical way to enhance the efficiency of manufacturing systems. Digital twins allow for detailed analysis of key metrics, such as the energy consumption of complete manufacturing systems. Utilizing digital twins can greatly assist in improving manufacturing processes for reduced energy consumption. In this paper, we investigate the data requirements for the generation of energy-oriented digital twins of manufacturing systems. For this purpose, we developed a case study to illustrate and outline the necessary data requirements for a manufacturing system to enable the collection of data that can be used to extract energy-oriented simulation models. We, subsequently, analyze and generalize our findings that can be applied to a broader context. © 2024 Elsevier B.V.. All rights reserved.

关键词： Energy efficiency

来源：评论

学校读者我要写书评

暂无评论

Impact of Annotation Noise on Histopathology Nucleus Segmentation

Impact of Annotation Noise on Histopathology Nucleus Segment...

引用

作者： Schilling, Marcel P. Ahuja, Niket Rettenberger, Luca Scherr, Tim Reischl, Markus Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany

Deep learning is often used for automated diagnosis support in biomedical image processing scenarios. Annotated datasets are essential for the supervised training of deep neural networks. The problem of consistent and noise-free annotation remains for experts such as pathologists. The variability within an annotator (intra) and the variability between annotators (inter) are current challenges. In clinical practice or biology, instance segmentation is a common task, but a comprehensive and quantitative study regarding the impact of noisy annotations lacks. In this paper, we present a concept to categorize and simulate various types of annotation noise as well as an evaluation of the impact on deep learning pipelines. Thereby, we use the multi-organ histology image dataset MoNuSeg to discuss the influence of annotator variability. We provide annotation recommendations for clinicians to achieve high-quality automated diagnostic algorithms. © 2022 The Author(s), published by De Gruyter.

关键词： Deep neural networks

来源：评论

学校读者我要写书评

暂无评论

Annotation Efforts in Image Segmentation can be Reduced by Neural Network Bootstrapping

Annotation Efforts in Image Segmentation can be Reduced by N...

引用

作者： Rettenberger, Luca Schilling, Marcel Reischl, Markus Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany

Modern medical technology offers potential for the automatic generation of datasets that can be fed into deep learning systems. However, even though raw data for supporting diagnostics can be obtained with manageable effort, generating annotations is burdensome and time-consuming. Since annotating images for semantic segmentation is particularly exhausting, methods to reduce the human effort are especially valuable. We propose a combined framework that utilizes unsupervised machine learning to automatically generate segmentation masks. Experiments on two biomedical datasets show that our approach generates noticeably better annotations than Otsu thresholding and k-means clustering without needing any additional manual effort. Using our framework, unannotated datasets can be amended with pre-annotations fully unsupervised thus reducing the human effort to a minimum. © 2022 by Walter de Gruyter Berlin/Boston.

关键词： Image annotation

来源：评论

学校读者我要写书评

暂无评论

Distributed Control Strategy for Grid Supportive Loads in DC Microgrids

Distributed Control Strategy for Grid Supportive Loads in DC...

引用

IEEE Electronic Power Grid (eGrid)

作者： Ömer Ekin Abhishek Balakrishnan Luigi Spatafora Veit Hagenmeyer Institute for Automation and Applied Informatics (IAI) Karlsruhe Institute of Technology (KIT) Karlsruhe Germany Department of Electrical Engineering and Information Technology Karlsruhe Institute of Technology (KIT) Karlsruhe Germany

ISBN: (数字)9798331505493

ISBN: (纸本)9798331505509

The increasing penetration of inverter-connected resources, such as solar and wind, into modern power grids has made grid-supportive control strategies increasingly crucial. Particularly, power electronics-interfaced loads have recently emerged as a valuable asset for grid support. This paper presents a novel control method enabling these power electronics-interfaced loads to actively support DC bus voltage control. The proposed strategy dynamically adjusts load demand to support grid voltage control during disturbances, without significantly impacting user functionality. The method is validated through simulations of a DC Microgrid consisting of a battery, photovoltaic array, and multiple load ports. Compared to conventional proportional-integral (PI) controllers, the Grid-Supportive Load (GSL) approach shows significant improvement in voltage control, reducing voltage drops and improving overall Microgrid reliability.

关键词： Photovoltaic systems Wind PI control Decentralized control Power system control Microgrids Distributed power generation Reliability Voltage control Load modeling

来源：评论

学校读者我要写书评

暂无评论

Security Fence Inspection at Airports Using Object Detection

Security Fence Inspection at Airports Using Object Detection

引用

IEEE Winter Applications and Computer Vision Workshops (WACVW)

作者： Nils Friederich Andreas Specker Jürgen Beyerer Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Fraunhofer IOSB Fraunhofer Center for Machine Learning Karlsruhe Institute of Technology Institute for Anthropomatics and Robotics

To ensure the security of airports, it is essential to protect the airside from unauthorized access. For this pur-pose, security fences are commonly used, but they require regular inspection to detect damages. However, due to the growing shortage of human specialists and the large man-ual effort, there is the need for automated methods. The aim is to automatically inspect the fence for damage with the help of an autonomous robot. In this work, we explore object detection methods to address the fence inspection task and localize various types of damages. In addition to evaluating four State-of-the-Art (SOTA) object detection models, we analyze the impact of several design criteria, aiming at adapting to the task-specific challenges. This in-cludes contrast adjustment, optimization of hyperparameters, and utilization of modern backbones. The experimental results indicate that our optimized You Only Look Once v5 (YOLOv5) model achieves the highest accuracy of the four methods with an increase of 6.9% points in Average Precision (AP) compared to the baseline. Moreover, we show the real-time capability of the model. The trained models are published on GitHub: hups://***/IN-Friederichlairport_fence_inspection.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Making Sense of Projects—Developing Project Portfolio Management Capabilities

引用

Schmalenbach Journal of Business Research 2024年第2期76卷 293-325页

作者： Ahlemann, Frederik Bergan, Peder Karger, Erik Greulich, Malte Reining, Stefan Chair of Information Systems and Strategic IT Management University of Duisburg-Essen Universitätsstr. 12 Essen 45141 Germany Department of Economics and Management Institute of Applied Informatics and Formal Description Methods (AIFB) Karlsruhe Institute of Technology Karlsruhe Germany

Project management and project portfolio management (PPM) foster competitiveness by facilitating the implementation of organizational strategy. Although organizations often struggle to develop PPM capabilities, the academic community does not have an in-depth understanding of the conditions for successfully developing these capabilities. In response, we conducted a multiple-case study with 50 interviewees to develop a theoretical model of the PPM capability-building process. This model is built on the notion of organizational sensemaking and identifies aspects that comprehensively explain why it usually takes so long to develop PPM capabilities. We conceptualize the PPM capability-building process as one that is strongly influenced by (1) the effects of structural rearrangements, (2) the appropriate use of external resources during that process, (3) the role of executive support and legitimization, (4) episodes of regression, and (5) the need for internalization and habitualization. In addition, we provide starting points for explaining organizational capability building in more general terms. © The Author(s) 2024. corrected publication 2024.

关键词： Capabilities Capability building External resources Habitualization Internalization Interpretive schema Legitimization M10 M14 M15 O31 O32 O33 Organizational sensemaking Project management Project portfolio management

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：