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Mask R-CNN Outperforms U-Net in Instance Segmentation for Overlapping Cells

Mask R-CNN Outperforms U-Net in Instance Segmentation for Ov...

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作者： Rettenberger, Luca Rieken Münke, Friedrich Bruch, Roman Reischl, Markus Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Eggenstein-Leopoldshafen Germany

U-Net is the go-to approach for biomedical segmentation applications. However, it is not designed to segment overlapping objects, a challenge Mask R-CNN has shown to have great potential in. Yet, Mask R-CNN receives little attention in biomedicine. Hence, we evaluate both approaches on a publicly available biomedical dataset. We find that Mask RCNN outperforms U-Net in segmenting overlapping cells and achieves comparable performance if they do not intersect. Our study provides valuable decision support to practitioners in selecting an appropriate method when solving instance segmentation tasks using deep learning, as well as important insights into enhancing the accuracy of such approaches in biomedical image analysis. © 2023 the author(s), published by Walter de Gruyter Berlin/Boston.

关键词： Computer vision

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A Spatial Decomposition Method for Solving the Security-Constrained Unit Commitment Problem 7

A Spatial Decomposition Method for Solving the Security-Cons...

引用

7th IEEE International Humanitarian Technologies Conference, IHTC 2024

作者： Madhusoodhanan, Arjun Kumar Giuntoli, Marco Schmitt, Susanne Harjunkoski, Iiro Poland, Jan Leibfried, Thomas Karlsruhe Institute of Technology Institute of Automation and Applied Informatics Karlsruhe Germany Karlsruhe Institute of Technology Institute for Electrical Energy Systems and High Voltage Technology Karlsruhe Germany Hitachi Energy Research Mannheim Germany

ISBN: (纸本)9798350354645

Today, we are experiencing exponential growth in distributed energy sources and storage systems, such as Battery Energy Storage Systems (BESS), which participate in the day-ahead energy market. Moreover, the need for energy market coupling to ensure social welfare maximization and grid security makes the Security-Constrained Unit Commitment (SCUC) problem more challenging due to the increasing problem size. This work proposes a novel approach for solving the SCUC problem in a distributed manner by decomposing the grid into multiple areas connected by tie-lines. The solution leverages the Alternating Direction Method of Multipliers (ADMM) to solve the problem efficiently. The proposed Spatially Decomposed SCUC method significantly reduces the computational burden arising from the combinatorial nature of the problem. The speed-up and optimality of the proposed method is validated on the IEEE 118-bus and RTE 6468-bus systems. © 2024 IEEE.

关键词： Commerce

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New feature based on influence lines for anomaly detection in bridge monitoring 12th

New feature based on influence lines for anomaly detection i...

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12th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2024

作者： Döring, A. Vogelbacher, M. Schneider, O. Müller, J. Hinz, S. Matthes, J. Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Karlsruhe Germany Büro für Strukturmechanik Coburg Germany Institute of Photogrammetry and Remote Sensing Karlsruhe Institute of Technology Karlsruhe Germany

ISBN: (纸本)9781032770406

Bridge monitoring using displacement, strain, acceleration or rotation measurements during normal operation can be a good supplement to conventional manual bridge inspections. In order to detect damage from the measured signal, features must be extracted from the signal that are primarily damage-sensitive. In recent years, features based on the influence lines have been increasingly investigated. The influence line represents the simplified signal that can be measured with a sensor at a fixed position when a single vehicle crosses the bridge. In this paper, we present the new feature normalised integrated influence lines (niil). We show that niil is sensitive to damage, independent of vehicle geometry, velocity, sampling rate, deviation from ideal lane and robust against noise using the analytical bending beam and strain data from a real bridge that has been successively damaged. niil can be calculated based on the curvature, rotation or displacement influence lines. © 2024 The Author(s).

关键词： Anomaly detection

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Lowering barriers to a large-scale implementation of grid booster projects by introducing a hybrid concept

Lowering barriers to a large-scale implementation of grid bo...

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2024 IEEE PES Innovative Smart Grid Technologies Europe Conference, ISGT EUROPE 2024

作者： Lotze, Jonas Dorn, Marvin Hagenmeyer, Veit TransnetBW GmbH Stuttgart Germany Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Eggenstein-Leopoldshafen Germany

ISBN: (纸本)9789531842976

The future of power systems belongs to renewables. And to integrate them, the expansion of the electricity grids is undoubtedly necessary. Furthermore, power systems cannot operate without reserves and flexibilities. For these to be efficient, system-serving, and economical, holistic concepts are needed. This paper describes the grid booster concept and presents the major barriers to a large-scale implementation in electric power systems. A proposal for enhancing economic viability and multi-applicability is presented through the discussion of a hybrid grid booster concept. © 2024 IEEE.

关键词： Power grids

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Application of Model-Free Control to Reduce the Total Harmonic Distortion of Inverters 8

Application of Model-Free Control to Reduce the Total Harmon...

引用

8th IEEE Workshop on the Electronic Grid, eGRID 2023

作者： Wachter, Jan Groll, Lutz Hagenmeyer, Veit Institute for Automation and Applied Informatics Karlsruhe Germany

ISBN: (纸本)9798350327007

With the fast rising number of power electronic devices in the electric grid, the harmonic emissions of those devices can lead to significant power quality issues. This is reflected in the recent addition of harmonic stability as one of the grid stability types. The reduction of harmonic emissions is an important task in the development of resilient carbon neutral grids. This paper describes the application of the model-free control concept for grid-Tied inverters as an easily implementable extension for dq0-frame based current control loops, which are often used in cascaded control schemes. The approach incorporates the information contained in the output current derivative. To balance phase-error and measurement noise suppression, the derivative is obtained using an algebraic numerical differentiator. The reduction of the total harmonic distortion (THD) is demonstrated for two use-cases in simulation, in order to show the transferability of the results. Further, measurement data from a hardware implementation of the concept is studied to verify the behavior under real-world conditions. For this, the influence of the tuning parameters is discussed along with limitations of the approach. © 2023 IEEE.

关键词： Power quality

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Feedforward control of flat hybrid automata: a behavioral systems theory approach 63

Feedforward control of flat hybrid automata: a behavioral sy...

引用

63rd IEEE Conference on Decision and Control, CDC 2024

作者： Zahn, Frederik Kleinert, Tobias Hagenmeyer, Veit Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Karlsruhe Germany Rwth Aachen University Chair of Process Control Engineering Aachen Germany

ISBN: (纸本)9798350316339

Differential flatness has been defined in the literature for continuous time dynamical systems and for discrete time systems. We define flatness of automata from the perspective of behavioral systems theory, and synthesize a flatness definition for hybrid automata. These new definitions allow for feedforward trajectory generation for flat hybrid automata. Additionally, we provide necessary and sufficient conditions of hybrid automaton flatness for different types of continuous state constraints and switching conditions, and how to compute whether a hybrid automaton is flat. We illustrate feedforward trajectory generation based on our findings for a robotic manipulator example. © 2024 IEEE.

关键词： Continuous time systems

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Multiobjective Optimization of Energy Pulsation and Power Dissipation in Modular Multilevel Converters (MMCs) 65

Multiobjective Optimization of Energy Pulsation and Power Di...

引用

65th IEEE Annual International Scientific Conference on Power and Electrical Engineering of Riga Technical University, RTUCON 2024

作者： Kappenstein, Simon T. Hagenmeyer, Veit Groll, Lutz Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany

ISBN: (纸本)9798350365771

This paper introduces a multiobjective optimization strategy for minimizing both energy pulsation and power dissipation in modular multilevel converters (MMCs). The occurrence of energy pulsation and power dissipation in MMCs has the negative potential to lead to a reduction in efficiency, to an increase in thermal stress, and to reliability issues. A Pareto front analysis shows that simultaneous improvement of both objectives is not possible. Analytical function optimization provides an exact solution for the case where only energy dissipation is considered. By optimizing the tradeoffs between minimizing energy pulsation and reducing power losses, this work offers a comprehensive solution to enhance the performance of MMCs. © 2024 IEEE.

关键词： Power converters

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Dissolved ozone sensing in water and blood based on commercial screen-printed and BDD electrodes

Dissolved ozone sensing in water and blood based on commerci...

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2023 IEEE Biomedical Circuits and Systems Conference, BioCAS 2023

作者： Petani, Lisa Llupa, Lea Peng, Zhen Ogata, Genki Koker, Liane Gengenbach, Ulrich Einaga, Yasuaki Pylatiuk, Christian Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Karlsruhe Germany Keio University Department of Chemistry Yokohama Japan

ISBN: (纸本)9798350300260

Dissolved ozone sensing in water is crucial for a variety of applications, including water treatment, food processing, and medical therapies, as ozone is widely used as an oxidising agent in these processes. Furthermore, dissolved ozone sensing in blood is important for medical therapies. We present a novel dissolved ozone sensor for measurement in water, based on commercially available screen-printed electrodes covered with different porous membranes made of polytetrafluoroethylene (PTFE) and non porous membranes made of polydimethylsiloxane (PDMS). With PTFE, a root mean squared error (RMSE), which is the difference between the novel sensor and the reference spectrometer, of 3.62 mg l-1 can be achieved, while with PDMS a RMSE of 6.34 mg l-1 is obtained. Also, we investigated the measurement of dissolved ozone in blood with membrane-free and electrolyte-free boron-doped diamond (BDD) electrodes. The proposed dissolved ozone sensors offer a promising solution for inexpensive monitoring of dissolved ozone concentrations in water and blood with a compact design. © 2023 IEEE.

关键词： amperometry disposable electrochemistry low-cost medical applications ozone therapy sensors water treatment

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Comparative Study on Smart Grid Security Testbeds Using MITRE ATT&CK Matrix 14

Comparative Study on Smart Grid Security Testbeds Using MITR...

引用

14th IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids, SmartGridComm 2023

作者： Mumrez, Aneeqa Roomi, Muhammad M. Tan, Heng Chuan Mashima, Daisuke Elbez, Ghada Hagenmeyer, Veit Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Kastel Security Research Labs Germany Singapore

ISBN: (纸本)9781665455541

The increasing use of information and communication technologies has led to increasing threats on critical infrastructure like smart grids. Owing to confidentiality issues and difficulties in experimenting cyberattacks on a real environment, testbeds reflecting the characteristics of smart grids have been developed to enable attack experiments and cybersecurity research. In fact, different implementations of smart grid testbeds exist, each with its own challenges and limitations. The comparative study we present here justifies the usability of each type of testbed for different experiments. We begin our study with a selection of state-of-the-art smart grid testbeds, which can be classified into physical, hybrid, and virtual. We then present an evaluation based upon several qualitative metrics and MITRE ATT&CK matrix to demonstrate the coverage of all tactics and techniques to guide about the selection of testbed according to security needs. Finally, we explain applicable tactics and techniques for one of the testbeds through an attack case study to highlight current cybersecurity challenges faced by smart grids. © 2023 IEEE.

关键词： Testbeds

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Demand Response in Smart Districts: Model Predictive Control of Building Cooling

Demand Response in Smart Districts: Model Predictive Control...

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2022 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2022

作者： Zwickel, Philipp Frahm, Moritz Galenzowski, Johannes Hafele, Karl-Heinz Maab, Heiko Waczowicz, Simon Hagenmeyer, Veit Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Karlsruhe Germany

ISBN: (数字)9781665480321

ISBN: (纸本)9781665480321

The present paper develops and compares three different Model Predictive Control (MPC) strategies for Demand Response (DR) of building cooling in a "smart district": Decentralized MPC (DeMPC), Centralized MPC (CeMPC), and scheduled Distributed MPC (DiMPC). A standard DeMPC approach leads to peaks in aggregated cooling power demand, as local controlling agents optimize each building decentrally. Because these peaks can stress the local power grid severely, we present and compare two additional MPC approaches, CeMPC and DiMPC, to enforce a constraint on the aggregated power use of the district. Our simulation results show that CeMPC and scheduled DiMPC reduce the peak load of the total cooling power in the district by 50 % while still providing DR and cooling the buildings adequately. © 2022 IEEE.

关键词： Model predictive control

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