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A Blockchain-Based Architecture for Securing Industrial IoTs Data in Electric Smart Grid

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Computers, materials & Continua 2023年第3期74卷 5389-5416页

作者： Samir M.Umran Songfeng Lu Zaid Ameen Abduljabbar Xueming Tang School of Cyber Science and Engineering Huazhong University of Science and TechnologyWuhan430074China Iraqi Ministry of Industrial and Minerals Iraqi Cement State CompanyBaghdad10011Iraq Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518057China Department of Computer Science College of Education for Pure SciencesUniversity of BasrahBasrah61004Iraq

There are numerous internet-connected devices attached to the industrial process through recent communication technologies,which enable machine-to-machine communication and the sharing of sensitive data through a new technology called the industrial internet of things(IIoTs).Most of the suggested security mechanisms are vulnerable to several cybersecurity threats due to their reliance on cloud-based services,external trusted authorities,and centralized architectures;they have high computation and communication costs,low performance,and are exposed to a single authority of failure and *** technology(BC)is widely adopted in the industrial sector for its valuable features in terms of decentralization,security,and *** our work,we propose a decentralized,scalable,lightweight,trusted and secure private network based on blockchain technology/smart contracts for the overhead circuit breaker of the electrical power grid of the Al-Kufa/Iraq power plant as an industrial *** proposed scheme offers a double layer of data encryption,device authentication,scalability,high performance,low power consumption,and improves the industry’s operations;provides efficient access control to the sensitive data generated by circuit breaker sensors and helps reduce power *** also address data aggregation operations,which are considered challenging in electric power smart *** utilize a multi-chain proof of rapid authentication(McPoRA)as a consensus mechanism,which helps to enhance the computational performance and effectively improve the *** advanced reduced instruction set computer(RISC)machinesARMCortex-M33 microcontroller adopted in our work,is characterized by ultra-low power consumption and high performance,as well as efficiency in terms of real-time cryptographic algorithms such as the elliptic curve digital signature algorithm(ECDSA).This improves the computational execution,increases the implementation speed of the asymmetric c

关键词： Smart grids industrial IoTs electric power system blockchain technology IoT applications industry 4.0 decentralization applications

铝合金表面电弧喷涂Ag基涂层及其低温钎焊行为

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焊接学报 2022年第12期43卷 27-34,I0004页

作者：肖勇程钊周建军张建罗丹李明雨武汉理工大学武汉430070 武汉理工大学材料复合新技术国家重点实验室武汉430070 Department of materials Science and Engineering The University of SheffieldSheffieldS13JDUK 哈尔滨工业大学(深圳) 深圳518055

在波导器件中,铝合金壳体较差的润湿性制约了其与微带电路板之间大面积、可靠低温钎焊连接.通过电弧喷涂技术在5A06铝合金表面制备了厚度约为80μm的Ag-15%Ni(质量分数)单一涂层和Ni-5%Al/Ag-15%Ni(质量分数)复合涂层,以提升Sn-Pb钎料... 详细信息

在波导器件中,铝合金壳体较差的润湿性制约了其与微带电路板之间大面积、可靠低温钎焊连接.通过电弧喷涂技术在5A06铝合金表面制备了厚度约为80μm的Ag-15%Ni(质量分数)单一涂层和Ni-5%Al/Ag-15%Ni(质量分数)复合涂层,以提升Sn-Pb钎料在其表面的润湿性.对比研究了两种涂层的显微结构、涂层界面结合性能、低温钎焊行为及钎焊接头剪切失效机制.结果表明,涂层与铝合金基板间形成了良好的界面结合,并且两种涂层均具有较好的低温焊接性.其中,Ag-15%Ni单一涂层与铝合金基板的结合强度为40 MPa,喷涂后铝合金基板与T2紫铜形成的钎焊接头抗剪强度为26 MPa.相较而言,Ni-5%Al/Ag-15%Ni复合涂层展现出更佳的涂层结合强度(42 MPa)和钎焊接头抗剪强度(31 MPa).

关键词：电弧喷涂铝合金基板银合金涂层低温钎焊结合强度

Narrowband Notch Filters with Composite Nanostructure Layers on a GaN-based Light Emitting Diode

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Narrowband Notch Filters with Composite Nanostructure Layers...

Semiconductor nanolasers and the size-energyefficiency challenge:a review

2012 International Conference on Nanotechnology Technology and advanced materials(ICNTAM 2012)

作者： Bing Cao Guiju Zhang Chinhua Wang Jianfeng Wang Ke Xu Institute of Modern Optical Technologies and key Lab of Modern Optical Technologies of Jiangsu Province Soochow University Suzhou Institute of Nano-tech and Nano-bionics Chinese Academy of Sciences

In this paper, novel active narrowband notch filters with triple-layer composite nanostructures on a Ga N-based LED are obtained by mainly adjusting the grating period and duty cycle. The three layers consist of two dielectric thin layers and one metallic / dielectric grating layer. The grating layer composes of subwavelength period and thickness rectangular stripes, which lies between a transition layer and a protecting layer. Line-width and attenuation peak properties of the resonance filters are calculated and investigated by using a full vector implementation of Rigorous Coupled Wave Analysis(RCWA) algorithm. It is shown that the grating period can significantly change the filter peak wavelength, and the grating duty cycle heavily changes the filter line-width. The filter attenuation peak has a red shift with 23.3nm as the grating period increases 18 nm. The FWHM(Full Width at Half Maximum) of the filter reduces from 1.9nm to 0.28 nm as the duty cycle changes from 0.55 to 0.3, which compressed more than six times. Moreover, thickness of each composite nanostructure layer can also affect the narrowband width and peak wavelength of the filter. The results provide guidance in designing, optimizing and fabricating such an active narrowband filter with highly integrated photonic devices.

关键词： notch filters narrowband Gallium nitride nanostructure

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advanced photonics 2019年第1期1卷 23-32页

作者： Cun-Zheng Ning Tsinghua University Department of Electronic EngineeringBeijingChina Tsinghua University International Center for Nano-OptoelectronicsBeijingChina Arizona state University School of ElectricalComputerand Energy EngineeringTempeArizonaUnited States

Semiconductor lasers,an important subfield of semiconductor photonics,have fundamentally changed many aspects of our lives and enabled many technologies since their creation in the *** in other semiconductor-based fields,such as microelectronics,miniaturization has been a constant theme,with nanolasers being an important frontier of research over the last *** review the progress,existing issues,and future prospects of nanolasers,especially in relation to their potential application in chip-scale optical *** of the important challenges in this application is minimizing the size and energy consumption of *** begin with the application background of this challenge and then compare basic features of various semiconductor *** present existing issues with nanolasers and discuss potential solutions to meet the size and energy-efficiency *** discussions cover a broad range of miniaturized lasers,including plasmonic nanolasers and lasers with two-dimensional monolayer gain materials,with focus on near-infrared wavelengths.

关键词： semiconductor lasers plasmonics photonic crystals two-dimensional monolayer materials energy efficiency optical interconnects.

Recent progress of efficient flexible solar cells based on nanostructures

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Journal of Semiconductors 2021年第10期42卷 93-102页

作者： Yiyi Zhu Qianpeng Zhang Lei Shu Daquan Zhang Zhiyong Fan Department of Electronic&Computer Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China HKUST-Shenzhen Research Institute Shenzhen 518057China Guangdong-Hong Kong-Macao Joint laboratory for Intelligent Micro-Nano Optoelectronic Technology HKUSTHong Kong 999077China

Flexible solar cells are important photovoltaics(PV)technologies due to the reduced processing temperature,less material consumption and mechanical flexibility,thus they have promising applications for portable devices and building-integrated ***,the efficient harvesting of photons is the core hindrance towards efficient,flexible *** management by nanostructures and nanomaterials has opened new pathways for sufficient solar energy *** on top surfaces provide an efficient pathway for the propagation of *** from suppressing incident light reflection,micro-structured back-reflectors reduce transmission via multiple *** themselves can be the absorber *** based on high-crystallinity nanostructured light absorbers demonstrate enhanced power conversion efficiency(PCE)and excellent mechanical *** acquire a deep understanding of the impacts of nanostructures,herein,a concise overview of the recent development in the design and application of nanostructures and nanomaterials for photovoltaics is summarized.

关键词： solar cells nanotechnology antireflection bendability PCE

advanced mid-infrared plasmonic waveguides for on-chip integrated photonics

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photonics Research 2023年第10期11卷 1694-1702页

作者： MAURO DAVID DAVIDE DISNAN ELENA ARIGLIANI ANNA LARDSCHNEIDER GEORG MARSCHICK HANH T.HOANG HERMANN DETZ BERNHARD LENDL ULRICH SCHMID GOTTFRIED STRASSER BORISLAV HINKOV Institute of Solid state Electronics and Center for Micro-and Nanostructures TU WienViennaAustria Institute of Sensor and Actuator Systems TU WienViennaAustria Central European Institute of Technology Brno University of TechnologyBrnoCzech Republic Institute of Chemical Technologies and Analytics ViennaAustria

Long-wave infrared(LWIR, 8–14 μm) photonics is a rapidly growing research field within the mid-IR with applications in molecular spectroscopy and optical free-space communication. LWIR applications are often addressed using rather bulky tabletop-sized free-space optical systems, preventing advanced photonic applications,such as rapid-time-scale experiments. Here, device miniaturization into photonic integrated circuits(PICs) with maintained optical capabilities is key to revolutionize mid-IR photonics. Subwavelength mode confinement in plasmonic structures enabled such miniaturization approaches in the visible-to-near-IR spectral range. However,adopting plasmonics for the LWIR needs suitable low-loss and-dispersion materials with compatible integration strategies to existing mid-IR technology. In this paper, we further unlock the field of LWIR/mid-IR PICs by combining photolithographic patterning of organic polymers with dielectric-loaded surface plasmon polariton(DLSPP) waveguides. In particular, polyethylene shows favorable optical properties, including low refractive index and broad transparency between ~2 μm and 200 μm. We investigate the whole value chain, including design, fabrication, and characterization of polyethylene-based DLSPP waveguides and demonstrate their first-time plasmonic operation and mode guiding capabilities along S-bend structures. Low bending losses of ~1.3 d B and straight-section propagation lengths of ~1 mm, pave the way for unprecedented complex on-chip mid-IR photonic devices. Moreover, DLSPPs allow full control of the mode parameters(propagation length and guiding capabilities) for precisely addressing advanced sensing and telecommunication applications with chip-scale devices.

关键词： waveguides transparency straight

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二次电池研究进展

物理化学学报 2022年第12期38卷 22-167页

作者：黄俊达朱宇辉冯煜韩叶虎谷振一刘日鑫杨冬月陈凯张相禹孙威辛森余彦尉海军张旭于乐王华刘新华付永柱李国杰吴兴隆马灿良王飞陈龙周光敏吴思思卢周广李秀婷刘继磊高鹏梁宵常智叶华林李彦光周亮尤雅王鹏飞杨超刘金平孙美玲毛明磊陈浩张山青黄岗余丁山徐建铁熊胜林张进涛王莹任玉荣杨春鹏徐韵涵陈亚楠许运华陈子峰杲祥文浦圣达郭少华李强曹晓雨明军皮欣朋梁超凡伽龙王俊雄焦淑红姚雨晏成林周栋李宝华彭新文陈冲唐永炳张桥保刘奇任金粲贺艳兵郝晓鸽郗凯陈立宝马建民电子科技大学材料与能源学院成都611731 中国科学院化学研究所北京100190 厦门大学材料学院福建厦门361005 中国科学技术大学材料科学与工程系合肥230026 东北师范大学物理学院长春130024 南京大学现代工程与应用科学学院南京210046 中国科学院长春应用化学研究所长春130022 北京化工大学有机无机复合材料国家重点实验室北京100029 北京工业大学材料与制造学部北京100124 北京航空航天大学化学学院北京100191 北京航空航天大学交通科学与工程学院北京100191 郑州大学化学学院郑州450001 郑州大学橡塑模具国家工程研究中心郑州450002 东北师范大学化学学院长春130024 山西大学分子科学研究所太原030006 复旦大学材料科学系上海200433 华东理工大学化工学院上海200237 清华大学深圳国际研究生院广东深圳518055 南方科技大学材料科学与工程系广东深圳518055 深圳大学高等研究院广东深圳518060 湖南大学材料科学与工程学院长沙410082 湖南大学化学化工学院长沙410082 中南大学材料科学与工程学院长沙410083 苏州大学功能纳米与软物质研究院江苏苏州215123 武汉理工大学材料复合新技术国家重点实验室武汉430070 西安交通大学电气工程学院西安710049 武汉理工大学化学化工与生命科学学院武汉430070 华中科技大学光学与电子信息学院武汉430074 Centre for Catalysis and Clean Energy School of Environment and ScienceGriffith UniversityGold CoastQLD4214Australia 中山大学化学学院广州510275 华南理工大学环境与能源学院广州510006 山东大学化学与化工学院济南250100 香港中文大学化学系中国香港999077 常州大学材料科学与工程学院江苏常州213164 天津大学化工学院天津300350 天津大学材料科学与工程学院天津300350 Department of materials University of OxfordOxfordOX13PH 青岛大学新能源科学与工程系山东青岛266071 河南工业大学化学化工学院郑州450001 华中科技大学材料科学与工程学院武汉430074 苏州大学能源学院江苏苏州215006 华南理工大学轻工科学与工程学院广州510641 中国科学院深圳先进技术研究院广东深圳518055 湖南大学物理与微电子科学学院长沙410082 香港城市大学物理系中国香港999077 Department of Mechanical and materials Engineering University of Western OntarioLondonOntario N6A 5B9Canada 西安交通大学化学学院西安710049 中南大学粉末冶金国家重点实验室长沙410083

能源的存储和利用是当今科学和技术发展中的重大课题之一,尤其是作为高效的电能/化学能转化装置的二次电池相关技术一直是科学家研究的热点领域。在此背景下,本文较为系统地介绍目前二次电池的重要研究进展,将从二次电池的发展历史引入... 详细信息

能源的存储和利用是当今科学和技术发展中的重大课题之一,尤其是作为高效的电能/化学能转化装置的二次电池相关技术一直是科学家研究的热点领域。在此背景下,本文较为系统地介绍目前二次电池的重要研究进展,将从二次电池的发展历史引入,再到其相关的基础理论知识的介绍。随后较为详细地讨论当前不同体系的二次电池及相关应的关键材料的研究进展,涉及到锂离子电池、钠离子电池、钾离子电池、镁离子电池、锌离子电池、钙离子电池、铝离子电池、氟离子电池、氯离子电池、双离子电池、锂-硫(硒)电池、钠-硫(硒)电池、钾-硫(硒)电池、多价金属-硫基电池、锂-氧电池、钠-氧电池、钾-氧电池、多价金属-氧气电池、锂-溴(碘)电池、水系金属离子电池、光辅助电池、柔性电池、有机电池、金属-二氧化碳电池等。此外,也介绍了电池研究中常见的电极反应过程表征技术,包括冷冻电镜、透射电镜、同步辐射、原位谱学表征、磁性表征等。本文将有助于研究人员对二次电池进行全面系统的了解与把握,并为之后二次电池的研究提供很好的指导作用。

关键词：二次电池电池体系电池材料电化学知识表征技术

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