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Experimental qualification and sensitivity study of antipodal patch antenna structures for orientation independent detection of partial discharges

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High Voltage 2024年第3期9卷 674-684页

作者： kerstin Friebe Frank Jenau TU Dortmund University Institute of High Voltage EngineeringDortmundGermany

Partial discharge diagnosis is an important part of monitoring and diagnosing compo-nents of the power transmission *** different patch antenna structures for the detection of partial discharges are *** patch antennas,which are realisable in a variety of geometric structures,are already the subject of *** offer the advantage of contactless detection without intervention in the test object or the measuring circuit,and also offer the possibility of alignment independent detection compared to directional ***,it is important and required to examine different structures extensively at the same measurement setup and to compare their *** achieve this,four different configurations of patch antenna structures based on basic geometries all in antipodal design are realised:a logarithmic periodic structure,a Hilbert fractal structure and two tapered slot *** are exposed to the same conditions on a special and unique measurement *** the main aspect,the performance of orientation independent detection of partial discharges patch antennas with varying distance and rotation in relation to the partial discharge source as well as the operating bandwidth is *** rate the structures,an evaluation scheme is created and a sensitivity matrix is generated.

关键词： antenna patch structures

BLE beacon-based floor detection for mobile robots in a multi-floor automation laboratory

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Transportation Safety and Environment 2024年第2期6卷 114-121页

作者： Haiping Wu Hui Liu Thomas Roddelkopf kerstin Thurow Institute of Artificial Intelligence&Robotics(IAIR) Key Laboratory of Traffic Safety on Track of Ministry of EducationSchool of Traffic and Transportation EngineeringCentral South UniversityChangshaHunan 410075China Center of Life Science Automation(celisca) 18119 Rostoc kGerman y Institute of Automation(IAT) University Rostock18119 RostockGermany

As an important task of multi-floor localization,floor detection has elicited great *** infrastructures like Wi-Fi and Bluetooth Low Energy(BLE)play important roles in floor ***,most floor detection research tends to focus on data modelling but pays little attention to the data collection system,which is the basis of wireless infrastructure-based floor *** fact,the floor detection task can be greatly simplified with proper data collection system *** this paper,a floor detection solution is developed in a multi-floor life science automation lab.A data collection system consisting of BLE beacons,a receiver node and an Internet of Things(IoT)cloud is *** features of the BLE beacon under different settings are evaluated in detail.A mean filter is designed to deal with the fluctuation of the received signal strength indicator data.A simple floor detection method without a training process was implemented and evaluated in more than 100 floor detection *** time delay and floor detection accuracy under different settings are ***,floor detection is evaluated on the H20 multi-floor transportation *** sensor nodes are installed on the robot at different *** floor detection performance with different installation heights is *** experimental results indicate that the proposed floor detection method provides floor detection accuracy of 0.9877 to 1 with a time delay of 5s.

关键词： BLE beacon floor detection multi-floor automation transportation robot

Correcting of the unexpected localization measurement for indoor automatic mobile robot transportation based on a neural network

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Transportation Safety and Environment 2024年第2期6卷 24-35页

作者： Jiahao Huang Steffen Jung inger Hui Liu kerstin Thurow Center for Life Science Automation(CELISCA) University of RostockRostock 18119Germany Institute of Automation University of RostockRostock 18119Germany Institute of Artificial Intelligence&Robotics(IAIR) School of Traffic&Transportation EngineeringCentral South UniversityChangsha 410075HunanChina

The increasing use of mobile robots in laboratory settings has led to a higher degree of laboratory ***,when mobile robots move in laboratory environments,mechanical errors,environmental disturbances and signal interruptions are *** can compromise the accuracy of the robot’s localization,which is crucial for the safety of staff,robots and the laboratory.A novel time-series predicting model based on the data processing method is proposed to handle the unexpected localization measurement of mobile robots in laboratory *** proposed model serves as an auxiliary localization system that can accurately correct unexpected localization errors by relying solely on the historical data of mobile *** experimental results demonstrate the effectiveness of this proposed method.

关键词： mobile robots laboratory automation indoor localization neural network

Recycling of solid-state batteries—challenge and opportunity for a circular economy?

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Materials Futures 2024年第1期3卷 10-30页

作者： Martine Jacob kerstin Wissel Oliver Clemens 1 Department of Chemical Materials Synthesis University of StuttgartInstitute of Materials ScienceHeisenbergstraße 370569 StuttgartGermany Technical University of Darmstadt Institute of Materials ScienceAlarich-Weiss-Straße 264287 DarmstadtGermany

The tremendous efforts made in the research field of solid-state Li-ion batteries have led to considerable advancement of this technology and the first market-ready systems can be expected in the near *** research community is currently investigating different solid-state electrolyte classes(***,sulfides,halides and polymers)with a focus on further optimizing the synthesis and electrochemical ***,so far,the development of sustainable recycling strategies allowing for an efficient backflow of critical elements contained in these batteries into the economic cycle and thus a transition from a linear to a circular economy lags *** this contribution,resource aspects with respect to the chemical value of crucial materials,which are used for the synthesis of solid-state electrolytes are being ***,an overview of possible approaches in relation to their challenges and opportunities for the recycling of solid-state batteries with respect to different solid-state electrolyte classes by means of pyrometallurgy,hydrometallurgy and direct recycling/dissolution-based separation processes is *** on these considerations and with reference to previous research,it will be shown that different solid-state electrolytes will require individually adapted recycling processes to be suitably designed for a circular economy and that further improvements and investigations will be required.

关键词： solid-state batteries solid-state electrolyte recycling circular economy

BLE beacons for sample position estimation in a life science automation laboratory

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Transportation Safety and Environment 2024年第3期6卷 111-123页

作者： Haiping Wu Steffen Junginger Thomas Roddelkopf Hui Liu kerstin Thurow Institute of Artificial Intelligence&Robotics(IAIR) Key Laboratory of Traffic Safety on Track of Ministry of EducationSchool of Traffic and Transportation EngineeringCentral South UniversityChangsha 410075HunanChina Institute of Automation(IAT) University of Rostock18119 RostockGermany Center of Life Science Automation(celisca) University of Rostock18119 RostockGermany

Estimation of the sample position is essential for working process monitoring and management in the life science automation lab*** low-energy(BLE)beacons have the advantages of low price,small size and low energy consumption,which make them a promising solution for sample position estimation in the automated *** fingerprinting models have been proposed to achieve indoor localization with the received signal strength(RSS)***,most of the research depends on intensive beacon *** estimation,which depends entirely on one beacon,is more suitable for sample position estimation in large automated *** complexity of the life science automation laboratory environment brings challenges to the traditional path loss model(PLM),which is a widely used radio wave propagation model-based proximity estimation *** this paper,BLE sensing devices for sample position estimation are *** BLE beacon-based proximity estimation is discussed in the framework of machine learning,in which the support vector regression(SVR)is utilized to model the nonlinear relationship between the RSS data and distance,and the Kalman filter is utilized to decrease the RSS data *** experimental results over different environments indicate that the SVR outperforms the PLM significantly,and provides 1 m absolute errors for more than 95%of the testing *** Kalman filter brings benefits to stable distance *** from proximity-based sample position estimation,the proposed framework turned out to be effective in position estimation between parallel workbenches and position estimation on an automated workstation.

关键词： BLE beacon position estimation proximity estimation received signal strength(RSS) support vector regression(SVR) life science automation laboratory

Insights into the hydrogen evolution reaction in vanadium redox flow batteries:A synchrotron radiation based X-ray imaging study

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Journal of Energy Chemistry 2024年第4期91卷 132-144页

作者： kerstin Köble Alexey Ershov Kangjun Duan Monja Schilling Alexander Rampf Angelica Cecilia TomášFaragó Marcus Zuber Tilo Baumbach Roswitha Zeis Helmholtz Institute Ulm Karlsruhe Institute of Technology89081 UlmGermany Laboratory for Applications of Synchrotron Radiation Karlsruhe Institute of Technology76131 KarlsruheGermany Institute for Photon Science and Synchrotron Radiation Karlsruhe Institute of Technology76344 Eggenstein-LeopoldshafenGermany Department of Electrical Electronicsand Communication EngineeringFaculty of EngineeringFriedrich-Alexander-Universität Erlangen-Nürnberg(FAU)91058 ErlangenGermany Department of Mechanical and Industrial Engineering University of TorontoToronto M5S 3G8OntarioCanada

The parasitic hydrogen evolution reaction(HER)in the negative half-cell of vanadium redox flow batteries(VRFBs)causes severe efficiency ***,a deeper understanding of this process and the accompanying bubble formation is *** benchmarking study locally analyzes the bubble distribution in thick,porous electrodes for the first time using deep learning-based image segmentation of synchrotron X-ray *** large three-dimensional data set was processed precisely in less than one minute while minimizing human errors and pointing out areas of increased HER activity in *** study systematically varies the electrode potential and material,concluding that more negative electrode potentials of-200 m V *** hydrogen electrode(RHE)and lower cause more substantial bubble formation,resulting in bubble fractions of around 15%–20%in carbon felt ***,the bubble fractions stay only around 2%in an electrode combining carbon felt and carbon *** detected areas with high HER activity,such as the border subregion with more than 30%bubble fraction in carbon felt electrodes,the cutting edges,and preferential spots in the electrode bulk,are potential-independent and suggest that larger electrodes with a higher bulk-to-border ratio might reduce HER-related performance *** described combination of electrochemical measurements,local X-ray microtomography,AI-based segmentation,and 3D morphometric analysis is a powerful and novel approach for local bubble analysis in three-dimensional porous electrodes,providing an essential toolkit for a broad community working on bubble-generating electrochemical systems.

关键词： Vanadium redox flow battery Synchrotron X-ray imaging Tomography Hydrogen evolution reaction Gas bubbles Deep learning

青少年社交媒体使用障碍量表的汉化及信效度研究

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中华行为医学与脑科学杂志 2024年第4期33卷 357-361页

作者：张雅雯 PASCHKE kerstin 王帅成都医学院心理学院成都610500 德国儿童和青少年成瘾研究中心汉堡-埃彭多夫大学医学中心汉堡20249

目的:引译青少年社交媒体使用障碍量表(social media use disorder scale for adolescents,SOMEDIS-A),并检验中文版的信效度。方法:将SOMEDIS-A翻译为中文,于2022年9月至2023年6月期间施测,采用SPSS 20.0软件对数据进行项目分析、探索... 详细信息

目的:引译青少年社交媒体使用障碍量表(social media use disorder scale for adolescents,SOMEDIS-A),并检验中文版的信效度。方法:将SOMEDIS-A翻译为中文,于2022年9月至2023年6月期间施测,采用SPSS 20.0软件对数据进行项目分析、探索性因素分析、验证性因素分析、结构效度检验、效标关联效度检验和信度检验。结果:中文版SOMEDIS-A的10个条目决断值显著(t=-27.043~-36.685,均P<0.01),探索性分析包含认知行为症状和负面后果两个因子合计9个条目,载荷系数均大于0.500;验证性分析各条目的因子载荷系数均大于0.300;中文版SOMEDIS-A量表及其各因子得分与效标量表得分均呈正相关(r=0.219~0.809,均P<0.01);总量表的Cronbachα系数和分半信度分别为0.940、0.896;认知行为症状和负面后果两因子的Cronbachα系数分别为0.825、0.924,二者分半信度分别为0.688、0.906。结论:中文版SOMEDIS-A具有良好的信效度,能够可靠地区分患有和未患有社交媒体使用障碍的青少年。

关键词：社交媒体使用青少年社交媒体使用障碍量表汉化信度效度

Dissecting the molecular basis of spike traits by integrating gene regulatory networks and genetic variation in wheat

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Plant Communications 2024年第5期5卷 57-74页

作者： Guo Ai Chao He Siteng Bi Ziru Zhou Ankui Liu Xin Hu Yanyan Liu Liujie Jin JiaCheng Zhou Heping Zhang Dengxiang Du Hao Chen Xin Gong Sulaiman Saeed Handong Su Caixia Lan Wei Chen Qiang Li Hailiang Mao Lin Li Hao Liu Dijun Chen kerstin Kaufmann Khaled FAlazab Wenhao Yan National Key Laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China College of Plant Science and Technology Huazhong Agricultural UniversityWuhan 430070China Shenzhen Institute of Nutrition and Health Huazhong Agricultural UniversityWuhan 430070China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenomeAnalysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing UniversityNanjing 210023China Department for Plant Cell and Molecular Biology Institute for BiologyHumboldt-Universitat Zu Berlin10115 BerlinGermany Plant Research Department Nuclear Research CenterEgyptian Atomic Energy AuthorityCairo 13759Egypt

Spike architecture inﬂuences both grain weight and grain number per spike,which are the two major components of grain yield in bread wheat(Triticum aestivum L.).However,the complex wheat genome and the inﬂuence of various environmental factors pose challenges in mapping the causal genes that affect spike ***,we systematically identified genes involved in spike trait formation by integrating information on genomic variation and gene regulatory networks controlling young spike development in *** identified 170 loci that are responsible for variations in spike length,spikelet number per spike,and grain number per spike through genome-wide association study and meta-QTL *** constructed gene regulatory networks for young inﬂorescences at the double ridge stage and theﬂoret primordium stage,in which the spikelet meristem and theﬂoret meristem are predominant,respec-tively,by integrating transcriptome,histone modification,chromatin accessibility,eQTL,and protein–pro-tein interactome *** these networks,we identified 169 hub genes located in 76 of the 170 QTL regions whose polymorphisms are significantly associated with variation in spike *** functions of TaZF-B1,VRT-B2,and TaSPL15-A/D in establishment of wheat spike architecture were *** study provides valuable molecular resources for understanding spike traits and demonstrates that combining genetic analysis and developmental regulatory networks is a robust approach for dissection of complex traits.

关键词： bread wheat spike traits genetic variation protein–protein interaction gene regulatory network

Limited potential of resolvin D1 in treatment of cholestatic liver fibrosis

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Hepatobiliary Surgery and Nutrition 2020年第5期9卷 587-596页

作者： kerstin Abshagen Alexander Hartmann Laura grüner Marie Liebig Brigitte Vollmar Institute for Experimental Surgery University Medicine RostockRostockGermany

Background:Several studies suggest a role for EPA-and DHA-derived pro-resolving mediators like resolvins in reversing metabolic and inflammatory disturbances seen in various chronic ***,we investigated the effects of resolvin D1(RvD1)on bile duct ligation(BDL)-induced cholestatic liver ***:Mice were treated daily with RvD1 or 0.1%ethanol(control)from the day of BDL until the final observation time *** and liver tissue were collected 2,5 and 14 days after BDL for different ***:RvD1 treatment of mice had no impact on the extent of cholestatic liver injury upon BDL,neither in the acute phase nor in the progressive state of liver *** RvD1 treatment resulted in a significantly reduced activity of hepatic stellate cells as well as reduced deposition of extracellular matrix 2 days after BDL,mice were not protected from inflammation and further fibrosis ***:These data indicate that RvD1 has a limited therapeutic potential to treat cholestatic liver diseases,as it has no significant impact on regression of hepatic necroinflammation and fibrotic changes in bile duct-ligated mice.

关键词： Lipid mediator n-3 polyunsaturated fatty acids bile duct ligation(BDL) mouse model