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Towards the performance limit of catenary meta-optics via field-driven optimization

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Opto-Electronic Advances 2024年第5期7卷 33-42页

作者： Siran Chen Ying.i ha Fei Zhang.Ming.o Pu hanlin Bao Ming.eng.Xu Ying.ui g.o Yue Shen Xiaoliang.ma Xiong.Li Xiang.ng.Luo National Key Laboratory of Optical Field manipulation Science and Technolog. Chinese Academy of SciencesChengdu 610209China State Key Laboratory of Optical Technolog.es on Nano-Fabrication and Micro-Eng.neering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Colleg. of materials Science and Opto-Electronic Technolog. University of Chinese Academy of SciencesBeijing 100049China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Department of Electrical and Computer Eng.neering University of California Los Angeles(UCLA)Los AngelesCalifornia 90095USA

Catenary optics enables metasurfaces with hig.er efficiency and wider bandwidth,and is hig.ly anticipated in the imag.ng.system,super-resolution lithog.1}phy,and broadband ***,the periodic boundary approximation without considering.aperiodic electromag.etic crosstalk poses challeng.s for catenary optical devices to reach their performance ***,perfect control of both local g.ometric and propag.tion phases is realized throug. field-driven optimization,in which the field distribution is calculated under real boundary *** from other optimization methods requiring.a mass of iterations,the proposed desig. method requires less than ten iterations to g.t the efficiency close to the optimal *** on the library of shape-optimized catenary structures,centimeter-scale devices can be desig.ed in ten seconds,with the performance improved by ~15%.Furthermore,this method has the ability to extend catenary-like continuous structures to arbitrary polarization,including.both linear and elliptical polarizations,which is difficult to achieve with traditional desig. *** provides a way for the development of catenary optics and serves as a potent tool for constructing.hig.-performance optical devices.

关键词： catenary optics catenary structures field-driven optimization

Current state-of-the-art review of footwear–g.ound friction

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Friction 2024年第10期12卷 2188-2204页

作者： David REBENDA Tomáš SÁha Footwear Research Centre University InstituteTomas Bata University in ZlinZlin 76001Czech Republic Faculty of Mechanical Eng.neering Brno University of TechnologyBron 61600Czech Republic

The most important role of footwear is to ensure safe,functional walking.and foot *** the proper functionality of not only the work shoes,the anti-slip behavior of the shoe under various conditions and environments plays an important role in the prevention of slips,trips,falls,and consequent *** article is intended to review the current understanding.of the frictional mechanisms between shoe outsoles and various counterfaces that impact the evaluation of outsole *** research focuses on the mechanisms driving.outsole friction on different g.ound surfaces or the definition and description of parameters that influence outsole ***,the review discusses the effect of various surface contaminants on footwear ***,challeng.s and outlooks in the field of footwear outsoles are briefly mentioned.

关键词： shoe outsole composite slipperiness coefficient of friction(COF) adhesion safe walk

Within-host models unravelling.the dynamics of deng.e reinfections

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infectious Disease Modelling 2024年第2期9卷 458-473页

作者： Vizda Anam Bruno V.g.errero Akhil Kumar Srivastav Nico Stollenwerk maíra Ag.iar Basque Center for Applied mathematics Basque CountrySpain Department of mathematics and Statistics University of Basque CountryBasque CountrySpain ikerbasque Basque Foundation for ScienceBasque CountrySpain

Caused by four serotypes,deng.e fever is a major public health concern *** modeling.efforts have mostly focused on primary and heterolog.us secondary infections,assuming.that lifelong.immunity prevents reinfections by the same ***,recent finding. challeng. this assumption,prompting.a reevaluation of deng.e immunity *** this study,we develop a within-host modeling.framework to explore different scenarios of deng.e *** previous studies,we g. beyond a deterministic framework,considering.individual immunolog.cal *** deterministic and stochastic models are calibrated using.empirical data on viral load and antibody(ig. and ig.)concentrations for all deng.e serotypes,incorporating.confidence intervals derived from stochastic *** g.od ag.eement between the mean of the stochastic realizations and the mean field solution for each model,our approach not only successfully captures primary and heterolog.us secondary infection dynamics facilitated by antibody-dependent enhancement(ADE)but also provides,for the first time,insig.ts into homotypic reinfection *** study discusses the relevance of homotypic reinfections in deng.e transmission at the population level,hig.lig.ting.potential implications for disease prevention and control strateg.es.

关键词： infections immunity prevention

Summer extreme precipitation patterns and synoptic-scale circulation precursors over the Tibetan Plateau

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Science China Earth Sciences 2024年第5期67卷 1625-1638页

作者： Zhiyuan DiNg.Yao ha Zhong.ZHONg Colleg. of Meteorolog. and Oceanog.0}phy National University of Defense TechnologyChangsha 410073China Key Laboratory for Virtual g.og.0}phic Environment School of Geography ScienceNanjing Normal UniversityNanjing 210023China Jiang.u Collaborative innovation Center for Climate Chang. School of Atmospheric SciencesNanjing UniversityNanjing 210023China

in the context of g.obal warming.the extreme summer precipitation over the Tibetan Plateau(TP)has chang.d *** this study,the summer(June–Aug.st)extreme precipitation on the TP was classified into three spatial types by applying.the K-means clustering.method to the Third Pole Reg.on long.time-series hig.-resolution(1/30°)precipitation dataset(TPHi Pr,1979–2020).The characteristics of the circulation anomalies and precursors corresponding.to the extreme precipitation on the TP in summer during.1979–2020 were *** results showed that the summer extreme precipitation of the TP can be categ.rized into northwestern(NW),southeastern(SE),and southern Himalayan(HS)types based on extreme precipitation *** NW and SE types are mainly influenced by anomalous sig.als in the mid-to-hig. latitude reg.ons upstream of them,whereas the HS type is controlled by the localized subtropical anomalous *** the 8th day before the onset of the NW type,an anomalous cyclone was observed in the western Atlantic Ocean(60°W,50°N),which trig.ered the west-to-east quasi-latitudinal propag.tion of Rossby *** the onset day of the NW type,the upper troposphere showed positive-neg.tive-positive g.opotential heig.t anomalies along.the latitudinal 40°N from the Caspian Sea,the western part of Xinjiang.to the northeastern *** entered from the Arabian Sea along.the southeastern edg. of the anomalous cyclone on the southwestern TP and converg.d in the northwestern *** to the NW type,the precursors of the SE type appeared at hig.er latitudes and were more *** the 8th day before the onset of the SE type,an anomalous cyclone occurred near g.eenland(60°W,70°N)and excited Rossby waves propag.ting.*** the onset day of the SE type,the upper troposphere showed neg.tive-positive-neg.tive g.opotential heig.t anomalies across Eurasia from the Ural Mountains and the iranian Plateau to the northern TP in the northwest-southeast directi

关键词： Tibetan Plateau Summer extreme precipitation Atmospheric circulation anomaly Precursor Teleconnection wave train

Liquid Metal g.id Patterned Thin Film Devices Toward Absorption‑Dominant and Strain‑Tunable Electromag.etic interference Shielding

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Nano-Micro Letters 2024年第11期16卷 541-553页

作者： Yuwen Wei Priyanuj Bhuyan Suk Jin Kwon Sihyun Kim Yejin Bae Mukesh Sing. Duy Thanh Tran Minjeong.ha Kwang.Un Jeong.Xing.ma Byeong.in Park Sung.une Park Department of Polymer‑Nano Science and Technolog. Department of Nano Convergence EngineeringJeonbuk National UniversityJeonju 54896Republic of Korea School of Chemical Eng.neering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Composites Research Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea School of materials Science and Eng.neering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea School of materials Science and Eng.neering and Sauvage Laboratory for Smart MaterialsHarbin Institute of Technology(Shenzhen)ShenzhenGuangdong 518055People’s Republic of China

The demand of hig.-performance thin-film-shaped deformable electromag.etic interference(EMi)shielding.devices is increasing.for the next g.neration of wearable and miniaturized soft *** hig.ly reflective conductive materials can effectively shield EMi,they prevent deformation of the devices owing.to rig.dity and g.nerate secondary electromag.etic pollution ***,soft and stretchable EMi shielding.thin film devices with absorption-dominant EMi shielding.behavior is *** devices consist of liquid metal(LM)layer and LM g.id-patterned layer separated by a thin elastomeric film,fabricated by leverag.ng.superior adhesion of aerosol-deposited LM on *** devices demonstrate hig. electromag.etic shielding.effectiveness(SE)(SE_(T) of up to 75 dB)with low reflectance(SER of 1.5 dB at the resonant frequency)owing.to EMi absorption induced by multiple internal reflection g.nerated in the LM g.id ***,the excellent stretchability of the LM-based devices facilitates tunable EMi shielding.abilities throug. g.id space adjustment upon strain(resonant frequency shift from 81.3 to 71.3 g.z@33%strain)and is also capable of retaining.shielding.effectiveness even after multiple strain *** newly explored device presents an advanced paradig. for powerful EMi shielding.performance for next-g.neration smart electronics.

关键词： Absorption-dominant electromag.etic interference shielding Liquid metals Soft and stretchable electronics Thin film devices Tunable electromag.etic interference shielding

integ.0}ted strateg.es on cobalt phosphides-based electrocatalysts for efficient hydrog.n evolution reaction

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Tung.ten 2024年第3期6卷 488-503页

作者： Thanh Dam mai ha Huu Do Faculty of Mechanical Eng.neering.and Technolog. Ho Chi Minh City University of Industry and Trade VKTech Research Center NTT Hi-Tech Institute Nguyen Tat Thanh University

The development of cost-effective and durable hydrog.n evolution reaction(HER) electrocatalysts plays a vital role in dealing.with the issues related to carbon dioxide *** phosphide-based nanomaterials are evaluated as promising.advocates for HER due to hig. catalytic activities,g.od stability,and rich *** review commences with an exploration of the synthetic pathways of CoP,including.solid-phase,solution-phase along.with electrochemical ***,the mechanism of hydrog.n formation is expressed thoroug.ly,after which various integ.0}ted strateg.es of morpholog. eng.neering.with doping.assisted hig.ly conductive materials,and construction of heterostructure were introduced for ***,burdensome tasks and possible g.idance for the advancement of CoP-based nanomaterials were discussed for hydrog.n production.

关键词： Cobalt phosphides Nanomaterials Electrocatalysts Hydrog.n evolution reaction

An Adaptive Data-driven Method Based on Fuzzy Log.c for Determining.Power System Voltag. Status

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Journal of Modern Power Systems and Clean Energ. 2024年第3期12卷 707-718页

作者： Sirwan Shazdeh Hêmin g.lpîra hassan Bevrani the SMg.C University of KurdistanSanandajIran Power Systems Modeling.Simulation Lab Department of Electrical EngineeringUniversity of KurdistanKurdistanSanandaj 66177-15175Iran

This paper proposes an adaptive method based on fuzzy log.c that utilizes data from phasor measurement units(PMUs) to assess and classify g.nerating.side voltag. trajectories. The voltag. variable and its associated derivatives are used as the input variables of a fuzzy-log.c block. in addition, the voltag. trajectory is compared with the pre-selected pilot-bus voltag. to make a reliable decision about the voltag. operational state. Different types of short-term voltag. dynamics are considered in the proposed method. The fuzzy membership functions are determined using.a systematic method that considers the current situation of the voltag. trajectory. Finally, the voltag. status is categ.rized into four classes to determine appropriate remedial actions. The proposed method is validated on a iEEE 73-bus power system in a maTLAB environment.

关键词： Fuzzy log.c fault-induced delayed voltag. recovery phasor measurement unit(PMU) short-term voltag. stability situational awareness voltag. classification

Elasticity meets topolog.

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National Science Review 2024年第6期11卷 84-85页

作者： g.ancong.ma Department of Physics Hong Kong Baptist University

We are surrounded by environments and items that are made from solid materials in our daily life. Any physical contact with any items is a mechanical disturbance that produces mechanical *** underlines the crucial role that such vibrations play in our daily interactions,hig.lig.ting.the need for a deeper understanding.and improved manipulation of these fundamental phenomena.

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Wearable Triboelectric Nanog.nerators Based on Printed Polyvinylidene Fluoride Films incorporated with Cobalt-Based Metal-Org.nic Framework for Self-Powered Mobile Electronics

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Energ. & Environmental materials 2024年第4期7卷 396-403页

作者： Myeong.Hyeon Kim Sang.Joon Park Tae-Jun ha Department of Electronic materials Eng.neering Kwangwoon University

in this study,wearable triboelectric nanog.nerators comprising.bar-printed polyvinylidene fluoride (PVDF) films incorporated with cobalt-based metalorg.nic framework (Co-MOF) were *** enhanced output performance of the TENCs was attributed to the phase transition of PVDF from α-crystals to β-crystals,as facilitated by the incorporation of the MOF.

关键词： bar printing phase transition polyvinylidene fluoride incorporated with cobalt-based metal–org.nic framework self-powered mobile electronics wearable triboelectric nanog.nerators