检索结果-内蒙古大学图书馆

Corrigendum to “Flexsensor: Automated measurement software for rapid photonic circuits capturing” [SoftwareX, Volume 27, September 2024, 101879]

引用

SoftwareX 2024年 28卷

作者： Christoph Schmidt Jakob Wilhelm Hinum-Wagner Reinhard Klambauer Alexander Bergmann Graz University of Technology Institute of Electrical Measurement and Sensor Systems Graz Austria ams-OSRAM AG Tobelbaderstraße 30 Premstaetten Austria

来源：评论

学校读者我要写书评

暂无评论

Neural Network-Based Multimode Fiber Imaging and Characterization Under Thermal Perturbations

arXiv

引用

arXiv 2024年

作者： Wang, Kun Zhu, Changyan Colicchia, Ennio Dong, Xingchen Kurz, Wolfgang Mizuno, Yosuke Jakobi, Martin Koch, Alexander W. Chong, Yidong Technical University of Munich School of Computation Information and Technology Institute for Measurement Systems and Sensor Technology Theresienstrasse 90 Munich80333 Germany Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore637371 Singapore Faculty of Engineering Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama240-8501 Japan Institute of Multidisciplinary Sciences Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama240-8501 Japan

Multimode fiber (MMF) imaging aided by machine learning holds promise for numerous applications, including medical endoscopy. A key challenge for this technology is the sensitivity of modal transmission characteristics to environmental perturbations. Here, we show experimentally that an MMF imaging scheme based on a neural network (NN) can achieve results that are significantly robust to thermal perturbations. For example, natural images are successfully reconstructed as the MMF's temperature is varied by up to 50◦C relative to the training scenario, despite substantial variations in the speckle patterns caused by thermal changes. A dense NN with a single hidden layer is found to outperform a convolutional NN suitable for standard computer vision tasks. In addition, we demonstrate that NN parameters can be used to understand the MMF properties by reconstructing the approximate transmission matrices, and we show that the image reconstruction accuracy is directly related to the temperature dependence of the MMF's transmission characteristics. © 2024, CC BY.

关键词： Multimode fibers

来源：评论

学校读者我要写书评

暂无评论

Quantization of Acoustic Modes in Dumbbell Nanoparticles

引用

Physical Review Letters 2022年第4期128卷 048003-048003页

作者： Zuyuan Wang Hojin Kim Maria Secchi Maurizio Montagna Eric M. Furst Bahram Djafari-Rouhani George Fytas Max Planck Institute for Polymer Research Ackermannweg 10 Mainz 55128 Germany Institute for Measurement and Automation Division of Sensor Technology and Measurement Systems Bundeswehr University Munich Werner Heisenberg Weg 39 85579 Neubiberg Germany Department of Chemical & Biomolecular Engineering Allan P. Colburn Laboratory University of Delaware Newark Delaware 19716 USA Department of Industrial Engineering University of Trento via Sommarive 9 I-38123 Trento Italy Dipartimento di Fisica Universitá di Trento via Sommarive 14 I-38123 Trento Italy Institut d’Électronique de Microélectronique et de Nanotechnologie (IEMN) UMRCNRS 8520 Department of Physics University of Lille Villeneuve d’Ascq 59655 France

The vibrational eigenmodes of dumbbell-shaped polystyrene nanoparticles are recorded by Brillouin light spectroscopy (BLS), and the full experimental spectra are calculated theoretically. Different from spheres with a degeneracy of (2l+1), with l being the angular momentum quantum number, the eigenmodes of dumbbells are either singly or doubly degenerate owing to their axial symmetry. The BLS spectrum reveals a new, low-frequency peak, which is attributed to the out-of-phase vibration of the two lobes of the dumbbell. The quantization of acoustic modes in these molecule-shaped dumbbell particles evolves from the primary colloidal spheres as the separation between the two lobes increases.

关键词： Light-matter interaction Scattering theory Soft colloids Brillouin scattering & spectroscopy Finite-element method Inelastic light scattering

来源：评论

学校读者我要写书评

暂无评论

PCR array on chip - thermal characterization

PCR array on chip - thermal characterization

引用

IEEE sensorS

作者： V.P. Iordanov J. Bastemeijer A. Bossche P.M. Sarro M. Malatek I.T. Young G.W.K. van Dedem M.J. Vellekoop Electronic lnstrumentation Laboratory DIMES Delft University of Technnology Delft Netherlands DIMES Electronic Components Technology and Materials Laboratory Delft University of Technnology Delft Netherlands Dep. of Measurement Faculty of Electrical Eng. Czech Technical University Prague Czech Republic Pattern Recognition Group Faculty of Applied Physics Delft University of Technology Delft Netherlands Kluyvcr Lab. for Biotechnology Faculty of Applied Physics Delft University of Technology Industrial Sensor Systems Institute of IEMW University of Technology Vienna Vienna Austria

This paper presents thermal analysis simulation and verification of a 50-nanoliter-reactor PCR (Polymerase Chain Reaction) well for application in silicon arrays, allowing 5/spl times/5 chamber matrix to be fitted on a 1cm/sup 2/ square. Every reactor cell is equipped with an integrated heater, temperature sensor and a photodetector. Each well forms a separate unit independently controlled and thermally insulated from the rest. Through micromachining the thermal capacity of each chamber is minimized, enabling rapid (8 - 10 cycles per minute) PCR cycling. To characterize the thermal behavior, an equivalent lumped element electrical circuit was defined and the results were compared to those obtained by Finite Element Method (FEM) analysis with CoventorWare/spl trade/. The proposed structure was implemented on a silicon substrate using a standard CMOS process and post-processing. Experiments were performed for verification of the model. Analysis shows that a temperature of about 95/spl deg/C can be reached (starting from 55/spl deg/C) by applying 1.5 W of electrical power in the integrated heater over a period of less than 2.5 seconds. The cooling (not active - self cooling) of the device is done in about 1.5 second.

关键词： Silicon Cooling Analytical models Polymers Inductors Temperature sensors Photodetectors Insulation Micromachining Rapid thermal processing

来源：评论

学校读者我要写书评

暂无评论

Evaluation of the Point Sampling Method and Inter-Comparison of Remote Emission Sensing systems for Screening Real-World Car Emissions

SSRN

引用

SSRN 2023年

作者： Knoll, Markus Penz, Martin Schmidt, Christina Pöhler, Denis Rossi, Tommaso Casadei, Simone Bernard, Yoann Hallquist, Åsa M. Sjödin, Åke Bergmann, Alexander Institute of Electric Measurement and Sensor Systems Graz University of Technology Inffeldgasse 33/I Graz8010 Austria Institute of Environmental Physics Heidelberg University INF 229 Heidelberg69120 Germany Airyx GmbH Justus-von-Liebig-Str. 14 Eppelheim69214 Germany Innovhub - Stazioni Sperimentali per l’Industria S.r.k. Sustainable Mobility Team Via G. Galilei 1 San Donate Milanese Milan20097 Italy ICCT International Council on Clean Transportation Neue Promenade 6 Berlin10178 Germany IVL Swedish Environmental Research Institute Valhallavaegen 81 Stockholm10031 Sweden

Emissions from internal combustion vehicles are currently not properly monitored throughout their life cycle. Remote Emission Sensing (RES) is a technology that can detect emissions in real driving conditions without contact. Current RES systems, based on the measurement of light extinction from exhaust plumes, are capable of providing emission factors for various gases, but lack accuracy for particulate matter (PM). Point Sampling (PS) is an RES technique that extracts portions of the exhaust plume using exhaust gas analyzers that measure gaseous compounds aswell as various particle metrics such as black carbon or particle number concentrations. In this work we have evaluated the performance of a recently developed PS system and the state-of-the-art light extinction based systems EDAR (HEAT) and AccuScan (OPUS RSE) in application settings. In three measurement campaigns in different European cities we co-located the PS system with one of the extinction based systems. Validation measurements with portable emission measurement systems and the emission screening of several thousand passenger cars provide detailed insights into the performance of the systems. measurement results demonstrate the ability of the PS system to screen high and low PM emitters equally well. The AccuScan system is capable of measuring PM emissions from older diesel vehicles, but the light extinction-based systems are unable to quantify PM emissions from vehicles that meet the latest emission standards. We found that all three systems tested were capable of screening NOx emissions with a similar level of accuracy. The applicability of the RES systems in different weather conditions was explored. The PS capture rate is strongly affected by wind conditions, but no other weather influences were found. Both light extinction based systems are unable to measure during rain. These results provide detailed information on the performance of different RES technologies. © 2023, The Authors. All rights res

关键词： Air pollution

来源：评论

学校读者我要写书评

暂无评论

Frequency Band Broadening and Charge Density Enhancement of a Vibrational Triboelectric Nanogenerator with Two Stoppers

SSRN

引用

SSRN 2022年

作者： Qi, Youchao Liu, Guoxu Kuang, Yang Wang, Lu Zeng, Jianhua Lin, Yuan Zhou, Han Zhu, Meiling Zhang, Chi CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing101400 China College of Engineering Mathematics and Physical Sciences University of Exeter ExeterEX4 4QF United Kingdom School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies Collaborative Innovation Center of Suzhou Nano Science and Technology Xi’an Jiaotong University Xi’an710049 China Center on Nanoenergy Research School of Physical Science and Technology Guangxi University China

Vibrational triboelectric nanogenerators (V-TENG) can be used to harvest broadband vibration energy due to the nonlinear impact force induced by a stopper. However, V-TENGs with a single stopper have limited bandwidth and surface charge density, which has limited their application in wideband vibration energy harvesting. Herein, a V-TENG with two stoppers is proposed for frequency band broadening and charge density enhancement. The theoretical analysis and experimental validation have indicated the V-TENG with two stoppers could improve the bandwidth by 75% compared with one stopper at a gap distance of 0.5 mm. Moreover, a charge pump can be constructed with two output channels, which has improved surface charge density by about 14 times. With the frequency varying from 18 to 38 Hz, the V-TENG can continually power 400 LEDs and charge a commercial capacitor quickly. This work has shown an encouraging method for enhancing the performance of V-TENGs, which also has great prospects in harvesting wideband vibration energy from machines, cars, ships, and human motions for self-powered electronics. © 2022, The Authors. All rights reserved.

关键词： Nanogenerators

来源：评论

学校读者我要写书评

暂无评论

Scanning Acoustic Microscopy for Quantifying Two-phase Transfer in Operando Alkaline Water Electrolyzer

arXiv

引用

arXiv 2024年

作者： Dou, Zehua Rox, Hannes Ramos, Zyzi Baumann, Robert Ravishankar, Rachappa Czurratis, Peter Yang, Xuegeng Lasagni, Andrés Fabian Eckert, Kerstin Czarske, Juergen Weik, David Faculty of Electrical and Computer Engineering Laboratory of Measurement and Sensor System Technique Technische Universität Dresden Helmholtzstraße 18 Dresden01069 Germany Institute of Fluid Dynamics Helmholtz-Zentrum Dresden-Rossendorf Bautzner Landstraße 400 Dresden01328 Germany PVA TePla Analytical Systems GmbH Deutschordenstraße 38 Westhausen73463 Germany Institute of Manufacturing Science and Engineering Technische Universität Dresden George-Baehr-Straße 3c Dresden01069 Germany Fraunhofer Institute for Material and Beam Technology IWS Winterbergstraße 28 Dresden01277 Germany Institute of Process Engineering and Environmental Technology Technische Universität Dresden Helmholtzstraße 14 Dresden01069 Germany Hydrogen Lab School of Engineering Technische Universität Dresden Helmholtzstraße 14 Dresden01062 Germany Institute for Emerging Electronic Technologies Leibniz Institute for Solid State and Materials Research Dresden Helmholtzstraße 20 Dresden01069 Germany

Improved understandings of two-phase transport in electrochemical gas-evolving systems are increasingly demanded, while high-performance imaging techniques using simplified instrumentations are not readily available. This work presents volumetric scanning acoustic microscopy (SAM) imaging for quantifying the dynamics of gas bubbles and electrolyte in porous Nickel electrodes with different wettability and structures during alkaline water electrolysis (AWE). We realize high-resolution 3D imaging at 10's µm level using high frequency spherically focused ultrasound. The high resolution allowed us to clearly visualize the spatial distributions of produced bubbles in the porous electrodes over time. Moreover, we are able to quantify the residual gas volume in an electrode and its coverage due to bubble evolution, which dominate its transport overpotential. Taking these advantages, we elucidate the impacts of electrodes' wettability and structures on their electrolysis performance, on a regular laboratory base. The obtained knowledge provides us important optimization guidelines of AWE designs and operating schemes. Copyright © 2024, The Authors. All rights reserved.

关键词： Mass transfer

来源：评论

学校读者我要写书评

暂无评论

Dermal Tattoo Biosensors for Colorimetric Metabolite Detection

引用

Angewandte Chemie 2019年第31期131卷

作者： Ali K. Yetisen Rosalia Moreddu Sarah Seifi Nan Jiang Katia Vega Xingchen Dong Jie Dong Haider Butt Martin Jakobi Martin Elsner Alexander W. Koch Institute for Measurement Systems and Sensor Technology Technical University of Munich 80333 Munich Germany School of Chemical Engineering University of Birmingham Edgbaston Birmingham B15 2TT UK School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA Department of Design University of California Davis CA 95616 USA Department of Mechanical Engineering Khalifa University Abu Dhabi 127788 United Arab Emirates Chair of Analytical Chemistry and Water Chemistry Technical University of Munich 81377 Munich Germany

Tattooing is a ubiquitous body modification involving the injection of ink and/or dye pigments into the dermis. Biosensors in the form of tattoos can be used to monitor metabolites in interstitial fluid. Here, minimally invasive, injectable dermal biosensors were developed for measuring pH, glucose, and albumin concentrations. The dermal pH sensor was based on methyl red, bromothymol blue, and phenolphthalein, which responded to a pH range from 5.0 to 9.0. The dermal glucose sensor consisted of glucose oxidase, 3,3′,5,5′‐tetramethylbenzidine, and peroxidase that detected concentrations up to 50.0 mmol L −1 . The dermal albumin sensor consisted of 3′,3′′,5′,5′′‐tetrachlorophenol‐3,4,5,6‐tetrabromosulfophthalein to measure concentrations up to 5.0 g L −1 . The sensors were multiplexed in ex vivo skin tissue and quantitative readouts were obtained using a smartphone camera. These sensors can be used to manage of acid–base homeostasis, diabetes, and liver failure in point‐of‐care settings.

关键词： Dermatologie Kolorimetrische sensoren Photomedizin Tätowierungen Tinten

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：