检索结果-内蒙古大学图书馆

CIRED 2024 Vienna Workshop

作者： Wohlfart, Peter Schicker, Irene Novakovits, Philipp Jurasszovich, Tanja Schindler, Markus Wind, Günter Gnam, Lukas Renner, Herwig Institute of Electrical Power Systems Graz University of Technology Graz Austria GeoSphere Austria Vienna Austria Research Burgenland Eisenstadt Austria Wind - Engineering Office for Physics and Electrical Engineering Eisenstadt Austria University of Applied Sciences Burgenland Pinkafeld Austria

ISBN: (纸本)9781837242672

In the context of integrating decentral renewable power generation facilities into energy systems, the term hosting capacity primarily refers to technical limitations of power grids. However, it is important to consider that technical factors are not the only barriers that may hinder the achievement of renewable expansion goals: Regulatory and economic challenges, as well as issues regarding social acceptance need to be considered accordingly. This paper provides an interdisciplinary overview of key elements that influence the achievement of national photovoltaic expansion goals in Austria. In order to create a holistic representation, multiple thematic fields are considered: technical aspects like flexibility, grid and forecasting as well as land use, social acceptance, economics and regulation. The results indicate the critical role of each thematic area. Barriers within a single field can act as bottlenecks and thus endanger the achievement of photovoltaic expansion targets. Furthermore, these thematic fields are partly interacting, which is considered in this paper as well. © The Institution of engineering & Technology 2024.

关键词： PHOTOVOLTAICS RENEWABLES SOCIAL ACCEPTANCE SYSTEM INTEGRATION

来源：评论

学校读者我要写书评

暂无评论

Interconnected skyrmions in a nanowire structure: Micromagnetic simulations

引用

Physical Review B 2024年第17期110卷 174415页

作者： Taichi Nishitani Syuta Honda Hiroyoshi Itoh Tomokatsu Ohsawa Masaaki A. Tanaka Department of Pure and Applied Physics Center for Spintronics Research Network Graduate School of Engineering Science Department of Electrical and Electronics Engineering Graduate School of Engineering

The magnetization dynamics of two skyrmions with antiparallel vortex rotations on a nanowire substrate were investigated using micromagnetic simulations. When positioned in proximity, the skyrmions exhibit attractive interactions that decrease their separation distance. This interaction leads to a magnetic energy transition, resulting in the fusion of the two skyrmions into a single connected entity. Applying a static magnetic field aligned with the magnetization direction of the skyrmion cores causes this connected structure to expand, increasing the distance between their cores. Conversely, exposing the connected skyrmions to a specific alternating magnetic field induces resonant oscillations in the core-to-core distance, with the resonance frequency decreasing as the field amplitude increases. The effective mass of the connected skyrmions at resonance is calculated using the resonance frequency. Notably, excessively high amplitudes can cause these oscillations to converge the skyrmions excessively, leading to their annihilation. In simulations involving both static and alternating magnetic fields, separation of the connected skyrmions was not observed. These findings have potential implications for the advancement of technologies utilizing skyrmion numbers for innovative applications.

关键词： Magnetization dynamics Skyrmions Landau-Lifschitz-Gilbert equation

来源：评论

学校读者我要写书评

暂无评论

Spectral Speckle Customization

Spectral Speckle Customization

引用

CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

作者： Bender, Nicholas Haig, Henry Christodoulides, Demetrios N. Wise, Frank School of Applied and Engineering Physics Cornell University IthacaNY14853 United States Ming Hsieh Department of Electrical and Computer Engineering University of Southern California Los AngelesCA90089 United States

We present an experimental technique for customizing the spatio-spectral speckled intensity statistics of ultra-short optical pulses at the output of a a disordered multimode fiber by controlling the spatial profile o... 详细信息

关键词： Multimode fibers

来源：评论

学校读者我要写书评

暂无评论

Spectral Speckle Customization

Spectral Speckle Customization

引用

2024 Conference on Lasers and Electro-Optics, CLEO 2024

ISBN: (纸本)9781957171395

关键词： Fiber lasers

来源：评论

学校读者我要写书评

暂无评论

Impact of a lightning strike on a low voltage transmission line: A case study from Fujel Gorkha, Nepal 12

Impact of a lightning strike on a low voltage transmission l...

引用

12th Asia-Pacific International Conference on Lightning, APL 2023

作者： Ghimire, Barun Sharma, Shriram Karki, Pradip Karki, Nava Raj Poudyal, Khem Narayan Gomes, Chandima Institute of Engineering Department of Applied Science and Chemical Engineering Pulchowk Campus TU Lalitpur Nepal Department of Physics Amrit Campus TU Kathmandu Nepal Tribhuvan University Department of Physics Kathmandu Nepal Institute of Engineering Department of Electrical Engineering Pulchowk Campus TU Nepal University of the Witwatersrand School of Electrical and Information Engineering Johannesburg South Africa

ISBN: (纸本)9781665456852

A case study on the property damage incurred by a lightning strike to a low-voltage transmission system in Fujel, a rural village of Gorkha, Nepal has been presented. The study aims at analyzing the extent of economic loss and investigates the nature of the impact. A lightning ground flash reportedly struck a low-voltage distribution line. The current travelled along the line towards the nearest post and entered the soil puncturing the base of the post. Fifteen newly installed electric meters were damaged out of which 3 were blown apart. Similarly, 5 television sets, and over 100 electric lamps were also damaged. A goat tamed in a wooden cage along with 10 others was also found dead after the lightning incident. Altogether, 20 households were affected by the strike incurring an estimated financial loss of about NPR 655,500 (approximately USD 6,000.00).A closer inspection of the affected houses and their electrical installations revealed that none of the houses had protective measures against lightning and even the TT wiring did not have an earthing system for the low-voltage electrical installation. This study reflects the level of vulnerability of the households in rural Nepal pertinent to lightning and electrical hazards. © 2023 IEEE.

关键词： Losses

来源：评论

学校读者我要写书评

暂无评论

Fluorescence Lifetime of NV Centers for Temperature-Insensitive All-Optical Magnetic Field Sensing 26

Fluorescence Lifetime of NV Centers for Temperature-Insensit...

引用

26th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing, SYNASC 2024

作者： Horsthemke, Ludwig Pogorzelski, Jens Stiegekotter, Dennis Hoffmann, Frederik Bulter, Ann-Sophie Langguth, Lutz Staacke, Robert Trinschek, Sarah Gregor, Markus Glosekotter, Peter FH Münster - University of Applied Sciences Department of Electrical Engineering and Computer Science Steinfurt48565 Germany Quantum Technologies GmbH Leipzig04103 Germany FH Münster - University of Applied Sciences Department of Engineering Physics Steinfurt48565 Germany

ISBN: (纸本)9798331532833

We investigate the combined temperature and magnetic field dependent behavior of high NV-density microdiamonds in an all-optical frequency-domain based setup, utilizing the change in fluorescence lifetime. We use these frequency-domain data to train neural networks for the prediction of temperatures and magnetic fields. At zero magnetic field, we show the ability to predict temperatures in the range of 0° C to 100°C, with a standard deviation of 1.24 °C. Furthermore, we show the ability to predict applied magnetic fields, while varying the ambient temperature. We achieve a higher accuracy, compared to the approach of observing of the fluorescence intensity at a single excitation frequency. © 2024 IEEE.

关键词： Magnetometry

来源：评论

学校读者我要写书评

暂无评论

Detection of Diabetes using Short-duration Photoplethysmography

Detection of Diabetes using Short-duration Photoplethysmogra...

引用

2024 IEEE Calcutta Conference, CALCON 2024

作者： Sardar, Priya Gupta, Rajarshi Chandra, Jayanta K. University of Calcutta Electrical Engineering Applied Physics Kolkata India R.K.Mahato Government Engg. College Electrical Engg. Department West Bengal Purulia India

ISBN: (纸本)9798331516666

Diabetes, a chronic metabolic disorder characterized by elevated blood sugar levels, affects millions of individuals worldwide and is associated with various complications, including cardiovascular disease, neuropathy, and retinopathy. This study addresses the pressing need for reliable and accessible diabetes detection by proposing a new approach using short-duration photoplethysmography (PPG) signals. Leveraging a publicly available dataset comprising 180 normal and 39 diabetic subjects, the signal flow first performed preprocessing aimed at reducing noise and eliminating artifacts and extracting a set of features from the processed signals, capturing their complexity and variability. Total 12 entropy features were extracted from preprocessed signal and fed to a random forest classifier for training. The proposed model achieves promising results, with an accuracy of 89%, specificity of 96.62% on blind test (unseen data). Despite the underrepresentation of diabetic subjects in the dataset, the study provides valuable insights into the feasibility of noninvasive diabetes detection using PPG signals. © 2024 IEEE.

关键词： Photoplethysmography

来源：评论

学校读者我要写书评

暂无评论

Performance Analysis of an UWB/SDM Optical Network Node with PIC-based Flexible WaveBand-Selective Switches

Performance Analysis of an UWB/SDM Optical Network Node with...

引用

2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Papapavlou, Charalampos Paximadis, Konstantinos Gomez, Braulio Marom, Dan M. Tomkos, Ioannis Department of Electrical and Computer Engineering University of Patras Patras26504 Greece Institute of Applied Physics Hebrew University of Jerusalem Israel VPI Photonics GmbH Germany

We analyze a hierarchical optical node architecture supporting flexible band switching using WBSSs across a variety of spatial/spectral granularities from a wavelength channel to full-fiber switching, offering high-pe... 详细信息

ISBN: (纸本)9781957171395

关键词： Optical fibers

来源：评论

学校读者我要写书评

暂无评论

Element-specific high-bandwidth ferromagnetic resonance spectroscopy with a coherent extreme-ultraviolet source

引用

Physical Review applied 2024年第6期21卷 064047-064047页

作者： Michael Tanksalvala Anthony Kos Jacob Wisser Scott Diddams Hans T. Nembach Justin M. Shaw Applied Physics Division Time & Frequency Division Electrical Computer & Energy Engineering Department of Physics Physical Measurement Laboratory

In this paper, we apply a tabletop, ultrafast, high-harmonic generation (HHG) source to measure the element-specific ferromagnetic resonance (FMR) in ultrathin magnetic alloys and multilayers on an opaque Si substrate. We demonstrate a continuous-wave bandwidth up to 62 GHz, with a promise to extend it to 100 GHz or higher. This laboratory-scale instrument detects the FMR using ultrafast, extreme-ultraviolet (EUV) light, with photon energies spanning the M-edges of the most relevant magnetic elements. A radiofrequency frequency comb generator is used to produce a microwave excitation that is intrinsically synchronized to the EUV pulses with a timing jitter of 1.1 ps or better. We apply this system to measure the dynamics in a multilayer system as well as Ni-Fe and Co-Fe alloys. Since this instrument operates in reflection mode, it is a milestone toward measuring and imaging the dynamics of the magnetic state and spin transport of active devices on arbitrary substrates on a tabletop. The higher bandwidth also enables measurements of materials with high magnetic anisotropy, as well as ferrimagnets, antiferromagnets, and short-wavelength (high-wavevector) spin waves in nanostructures or nanodevices. Furthermore, the coherence and short wavelength of the EUV will enable extending these studies using dynamic nanoscale lensless imaging techniques such as coherent diffractive imaging, ptychography, and holography.

关键词： High-order harmonic generation Magnetization dynamics Magneto-optical Kerr effect Ultrafast phenomena Ferromagnetic resonance Optical nanoscopy Spectroscopy X-ray techniques

来源：评论

学校读者我要写书评

暂无评论

Energy Management System for EV Charging Stations Powered by Renewable Energy Sources 12

Energy Management System for EV Charging Stations Powered by...

引用

12th International Conference and Exposition on electrical and Power engineering, EPE 2022

作者： Ciceu, Cosmin Serban, Ioan Transilvania University of Brasov Department of Electrical Engineering and Applied Physics Brasov Romania

ISBN: (数字)9781665489942

ISBN: (纸本)9781665489942

A practical energy management system (EMS) for electric vehicle (EV) charging stations powered by renewable energy sources is proposed in this paper. The solution is flexible enough to be adapted either to prosumers, which typically include small photovoltaic (PV) power plants for self-consumption, or to dedicated PV-based EV charging stations. By using standard communication and protocols, the proposed EMS implements an algorithm that can be easily configured to operate with commercially available equipment (e.g. PV and battery inverters, EV charging stations) and to follow a certain optimization target according to the EV owner choice. The proposed EV charging EMS was experimentally tested using a system developed in a campus building, including a rooftop PV power plant, a Li-ion battery storage system and a level 2 EV charging station. The experimental results, covering 11 months of operation, validate the proposed EMS in real operating conditions. © 2022 IEEE.

关键词： Energy management systems

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：