检索结果-内蒙古大学图书馆

Towards high-field applications: high-performance,low-cost iron-based superconductors

National Science Review 2024年第11期11卷 225-244页

作者： Chiheng Dong Qingjin Xu Yanwei Ma Key Laboratory of Applied Superconductivity Institute of Electrical Engineering Chinese Academy of Sciences Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology University of Chinese Academy of Sciences Institute of High Energy Physics Chinese Academy of Sciences

High magnetic fields play a crucial role in advancing basic sciences, fusion energy, and magnetic resonance imaging systems. However, the widespread use of high-field magnets requires affordable high-temperature superconducting wires that can carry large supercurrents. Iron-based superconductors offer an economically attractive solution to push forward important yet costly scientific programs, such as nuclear fusion reactors and next-generation particle accelerators. In this review, we start with the fabrication of iron-based superconducting wires and tapes and continue to discuss several key factors governing the current transport properties. State-of-the-art wires and tapes are introduced with emphasis on grain boundary characteristics,flux pinning, and anisotropy. The architecture of flexible conductors enables low cost, high mechanical strength, and high thermal stability. Recent progress in practical applications, including superconducting joints and insert coils, is also reviewed. Finally, we propose several key questions faced by iron-based superconductors in future practical applications.

关键词： iron-based superconductors superconducting wires critical current density flux pinning superconducting joints high-field magnets

来源：评论

学校读者我要写书评

暂无评论

Group IV topological quantum alloy and the role of short-range order:the case of Ge-rich Ge_(1–x)Pb_(x)

引用

npj Computational Materials 2024年第1期10卷 2397-2403页

作者： Yunfan Liang Shunda Chen Xiaochen Jin Damien West Shui-Qing Yu Tianshu Li Shengbai Zhang Department of Physics Applied Physicsand AstronomyRensselaer Polytechnic InstituteTroyNY 12180USA Department of Civil and Environmental Engineering George Washington UniversityWashingtonDC 20052USA Department of Electrical Engineering University of ArkansasFayettevilleAR 72701USA

Despite the explosion of interest in topological materials over the last decades,their applications remain limited due to challenges in growth and incorporation with today’s *** a potential bridge to close this gap,we investigate the group-IV alloy Ge_(1–x)Pb_(x),in the Ge-rich condition using density functional theory and show that relatively low concentrations of Pb(~9.4%)can lead to a topological phase transition.

关键词： alloy transition

来源：评论

学校读者我要写书评

暂无评论

Energy Management Strategy with a Hybrid Renewable Energy System for a Standalone House 16

Energy Management Strategy with a Hybrid Renewable Energy Sy...

引用

16th International Conference on applied and Theoretical Electricity, ICATE 2024

作者： Mustata, Laurentiu-Alex Sorea, Gheorghe-Dan Helerea, Elena Transilvania University Electrical Engineering and Computer Science Faculty Electrical Engineering and Applied Physics Department Brasov Romania

ISBN: (纸本)9798350388107

In the case of standalone houses, ensuring a continuous and regulated power supply from renewable sources is crucial. To address their unpredictable nature, an environmentally conscious hybrid renewable energy system combining photovoltaic panels, a battery, and a Diesel generator is considered. A software application simulates the power flow in a standalone house with common AC loads, analysing summer and winter scenarios over 24 hours. The strategy employed provides an optimal energy management by using the Diesel generator only during peak demand when PV is available and to cover loads and maintain battery life when PV is not in operation. The simulation results provide valuable insights for designing such hybrid energy systems and for enhancing system responsiveness to dynamic energy demands. © 2024 IEEE.

关键词： Hybrid power

来源：评论

学校读者我要写书评

暂无评论

Quasi-two dimensional Ruddlesden−Popper halide perovskites for laser applications

引用

Frontiers of physics 2024年第2期19卷 53-71页

作者： Kun Chen Qianpeng Zhang Yin Liang Jiepeng Song Chun Li Shi Chen Fang Li Qing Zhang School of Mechanical and Electrical Engineering Wuhan Institute of TechnologyWuhan 430205China School of Materials Science and Engineering Peking UniversityBeijing 100871China Institute of Applied Physics and Materials Engineering Macao UniversityMacao 999078China

Quasi-two-dimensional(2D)Ruddlesden‒Popper(RP)halide perovskites,as a kind of emerged two-dimensional layered materials,have recently achieved great attentions in lasing materials field owing to their large exciton binding energy,high emission yield,large optical gain,and wide-range tuning of optical *** review will introduce research progresses of RP halide perovskites for lasing applications in aspects of materials,photophysics,and devices with emphasis on emission and lasing properties tailored by the molecular composition and *** materials,structures and fabrications are introduced in the first ***,the optical transitions and amplified spontaneous emission properties are discussed from the aspects of electronic structure,exciton,gain dynamics,and interface ***,the research progresses on lasing devices are summarized and several types of lasers including VCSEL,DFB lasers,microlasers,random lasers,plasmonic lasers,and polariton lasers are *** last,the challenges and perspectives would be provided.

关键词： two-dimensional materials metal halide perovskite Ruddlesden−Popper halide perovskites lasing emission

来源：评论

学校读者我要写书评

暂无评论

New insights on thermal ageing of electrical insulating oils as revealed from photoluminescence and absorption spectroscopy

引用

High Voltage 2024年第5期9卷 1033-1045页

作者： Hesham S.Karaman Eman G.Atiya Diaa-Eldin A.Mansour Mohsen Ghali Z.M.S.Elbarbary Manal M.Emara Department of Electrical Engineering Faculty of Engineering at ShoubraBenha UniversityCairoEgypt Department of Electrical Power and Machines Engineering Faculty of EngineeringTanta UniversityTantaEgypt Department of Electrical Power Engineering Faculty of EngineeringEgypt-Japan University of Science and Technology(E-JUST)New Borg El-Arab CityAlexandriaEgypt Department of Energy Materials Institute of Basic and Applied ScienceEgypt-Japan University of Science and Technology(E-JUST)New Borg El-Arab CityAlexandriaEgypt Department of Physics Faculty of ScienceKafrelsheikh UniversityKafrelsheikhEgypt Department of Electrical Engineering College of EngineeringKing Khalid UniversityAbhaSaudi Arabia Center for Engineering and Technology Innovations King Khalid UniversityAbhaSaudi Arabia Department of Electrical Engineering Faculty of EngineeringKafrelsheikh UniversityKafrelsheikhEgypt

Recently,significant efforts have been exerted to replace mineral oil with environmentally friendly oils due to safety and environmental ***,there is a need to clarify the physical mechanisms behind the ageing impact of these *** authors use advanced optical spectroscopy techniques in correlation with dielectric measurements to understand the ageing processes in environmentally friendly oils as well as mineral ***,different samples of environmentally friendly oils and mineral oil were utilised to investigate the ageing *** samples were subjected to different ageing periods using a thermal accelerated ageing ***,the severity of the produced byproducts due to the oil degradation is examined based on several measured properties representing macroscopic and microscopic *** macroscopic category was evaluated through dielectric properties,including breakdown voltage,dielectric permittivity,and dissipation *** microscopic category,on the other hand,was assessed using techniques such as ultraviolet-visible absorption spectroscopy and photoluminescence *** techniques enabled a deep understanding of the molecular-level changes occurring in the oil under ageing conditions,thereby getting new insights into oil ageing *** is worth mentioning that natural ester oil demonstrated the most favourable performance across various properties under ageing conditions.

关键词： absorption thermal spectroscopy

来源：评论

学校读者我要写书评

暂无评论

A Dual Active Bridge-Based Converter for Electric Vehicle Integration in Hybrid Microgrids 13

A Dual Active Bridge-Based Converter for Electric Vehicle In...

引用

13th IEEE International Conference and Expositions on Electric and Power engineering, EPEi 2024

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

ISBN: (纸本)9798350356199

The dual active bridge (DAB) converter is one of the promising isolated DC-DC converter topologies finding its application in various fields including energy storage systems and electric vehicle (EV) chargers. In the bidirectional version, the DAB converter is of great interest in vehicle-to-grid (V2G) technologies. Therefore, this paper presents the control and simulation of a DAB converter tailored for EV charging, with added V2G capabilities, to allow interconnection in smart microgrids (MGs). The proposed system enables seamless connection between the DAB and an AC MG through an inverter. With this arrangement, the DAB can share power with both a DC MG and an AC MG, thus forming an AC/DC hybrid MG, which enhances energy management flexibility and facilitates the integration of renewable energy sources. The presented results show that the DAB converter can provide MG control support, showcasing its potential to contribute to a sustainable and resilient energy infrastructure aiding to the overall MG performance. © 2024 IEEE.

关键词： Vehicle-to-grid

来源：评论

学校读者我要写书评

暂无评论

Series-Connected Low Power Wind Turbines for Small-Scale Wind Farms 13

Series-Connected Low Power Wind Turbines for Small-Scale Win...

引用

13th IEEE International Conference and Expositions on Electric and Power engineering, EPEi 2024

作者： Radulescu, Andrei Viorel Serban, Ioan Transilvania University of Brasov Department of Electrical Engineering and Applied Physics Brasov Romania

ISBN: (纸本)9798350356199

The integration of small-scale wind turbines into the power grid presents an opportunity to harness renewable energy in a distributed and scalable manner. This paper focuses on the modelling and simulation of series-connected Permanent Magnet Synchronous Generators (PMSG) for small-scale wind farms. The key objectives are to analyse the dynamics of series-connected PMSGs, evaluate their performance, and assess their feasibility for small-scale wind energy applications. © 2024 IEEE.

关键词： Windmill

来源：评论

学校读者我要写书评

暂无评论

Deep learning with photonic neural cellular automata

引用

Light(Science & Applications) 2024年第12期13卷 3030-3040页

作者： Gordon H.Y.Li Christian R.Leefmans James Williams Robert M.Gray Midya Parto Alireza Marandi Department of Applied Physics California Institute of TechnologyPasadenaCAUSA Department of Electrical Engineering California Institute of TechnologyPasadenaCAUSA Physics and Informatics Laboratories NTT Research Inc.SunnyvaleCAUSA

Rapid advancements in deep learning over the past decade have fueled an insatiable demand for efficient and scalable *** offers a promising solution by leveraging the unique properties of ***,conventional neural network architectures,which typically require dense programmable connections,pose several practical challenges for photonic *** overcome these limitations,we propose and experimentally demonstrate Photonic Neural Cellular Automata(PNCA)for photonic deep learning with sparse *** harnesses the speed and interconnectivity of photonics,as well as the self-organizing nature of cellular automata through local interactions to achieve robust,reliable,and efficient *** utilize linear light interference and parametric nonlinear optics for all-optical computations in a time-multiplexed photonic network to experimentally perform self-organized image *** demonstrate binary(two-class)classification of images using as few as 3 programmable photonic parameters,achieving high experimental accuracy with the ability to also recognize out-ofdistribution *** proposed PNCA approach can be adapted to a wide range of existing photonic hardware and provides a compelling alternative to conventional photonic neural networks by maximizing the advantages of lightbased computing whilst mitigating their practical *** results showcase the potential of PNCA in advancing photonic deep learning and highlights a path for next-generation photonic computers.

关键词： automata connectivity utilize

来源：评论

学校读者我要写书评

暂无评论

Enhancing the Performance of Perovskite Light-Emitting Diodes via Synergistic Effect of Defect Passivation and Dielectric Screening

引用

Nano-Micro Letters 2024年第10期16卷 244-256页

作者： Xuanchi Yu Jia Guo Yulin Mao Chengwei Shan Fengshou Tian Bingheng Meng Zhaojin Wang Tianqi Zhang Aung Ko Ko Kyaw Shuming Chen Xiaowei Sun Kai Wang Rui Chen Guichuan Xing Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacao 999078People's Republic of China Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055People's Republic of China

Metal halide perovskites,particularly the quasi-two-dimensional perovskite subclass,have exhibited considerable potential for next-generation electroluminescent materials for lighting and ***,the presence of defects within these perovskites has a substantial influence on the emission efficiency and durability of the *** this study,we revealed a synergistic passivation mechanism on perovskite films by using a dual-functional compound of potassium *** dual functional potassium bromide on the one hand can passivate the defects of halide vacancies with bromine anions and,on the other hand,can screen the charged defects at the grain boundaries with potassium *** approach effectively reduces the probability of carriers quenching resulting from charged defects capture and consequently enhances the radiative recombination efficiency of perovskite thin films,leading to a significant enhancement of photoluminescence quantum yield to near-unity values(95%).Meanwhile,the potassium bromide treatment promoted the growth of homogeneous and smooth film,facilitating the charge carrier injection in the ***,the perovskite light-emitting diodes based on this strategy achieve a maximum external quantum efficiency of~21%and maximum luminance of~60,000 cd m^(-2).This work provides a deeper insight into the passivation mechanism of ionic compound additives in perovskite with the solution method.

关键词： Synergistic passivation strategy Defects passivation Dielectric screening Perovskite light-emitting diodes

来源：评论

学校读者我要写书评

暂无评论

The study of intelligent algorithm in particle identification of heavy-ion collisions at low and intermediate energies

引用

Nuclear Science and Techniques 2024年第2期35卷 170-182页

作者： Gao-Yi Cheng Qian-Min Su Xi-Guang Cao Guo-Qiang Zhang School of Electronic and Electrical Engineering Shanghai University of Engineering ScienceShanghai 201620China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

Traditional particle identification methods face timeconsuming,experience-dependent,and poor repeatability challenges in heavy-ion collisions at low and intermediate *** urgently need solutions to the dilemma of traditional particle identification *** study explores the possibility of applying intelligent learning algorithms to the particle identification of heavy-ion collisions at low and intermediate *** intelligent algorithms,including XgBoost and TabNet,were selected to test datasets from the neutron ion multi-detector for reaction-oriented dynamics(NIMROD-ISiS)and Geant4 ***-based machine learning algorithms and deep learning algorithms *** show excellent performance and generalization *** additional data features besides energy deposition can improve the algorithm’s performance when the data distribution is *** learning algorithms can be applied to solve the particle identification problem in heavy-ion collisions at low and intermediate energies.

关键词： Heavy-ion collisions at low and intermediate energies Machine learning Ensemble learning algorithm Particle identification Data imbalance

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：