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Merging bound states in the continuum in an open acoustic resonator

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 124-131页

作者： lujun huang Bin Jia Artem S.Pilipchuk Sibo huang Chen Shen Almas F.Sadreev Yong li Andrey E.Miroshnichenko School of Physics and Electronic Sciences East China Normal University Institute of Acoustics Tongji University l.V.Kirensky Institute of Physics department of Mechanical Engineering Rowan University School of Engineering and Technology University of New South Wales at Canberra

Bound states in the continuum （BICs） are perfectly localized resonances despite embedding in the continuum ***,an isolated BIC is very sensitive to the structure ***,we report merging acoustic BICs in a single open resonator,robust against the structure *** find that both symmetry-protected BIC and Friedrich-Wintgen BIC are sustained in a single coupled waveguide-resonator *** varying the height and length of the resonator,these two BICs move toward each other and merge into a single one at a critical *** to an individual BIC,the merged BIC is robust against fabrication error because its Q-factor is proportional to Δl-4,whereΔl embodies the structure *** essence of this extraordinary phenomenon is perfectly explained by the two-and three-level approximations of the effective nonHermitian ***,we present direct experimental demonstrations of the moving and merging of BICs in a coupled 3d waveguide-resonator,which are evidenced by the vanishing of the linewidth of Fano resonance in the transmission *** results may find exciting applications in designing high-quality acoustic sources,sensors and filters.

关键词： acoustic resonances bound state in the continuum high-Q resonances

Machine learning driven rational design of dual atom catalysts on graphene for carbon dioxide electroreduction

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Nano Research 2025年第1期18卷 186-194页

作者： dongxu Jiao xinyi li Mingzi Sun lin liu Jinchang Fan Jingxiang Zhao Bolong huang Xiaoqiang Cui State Key laboratory of Automotive Simulation and Control School of Materials Science and Engineeringand Key Laboratory of Automobile Materials of MOEJilin UniversityChangchun 130012China department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina College of Chemistry and Chemical Engineering and Key Laboratory of Photonic and Electronic Bandgap MaterialsMinistry of EducationHarbin Normal UniversityHarbin 150025China

The development of high-performance atomiccatalysts for the carbon dioxide reduction reaction(CO_(2)RR)is atime-consuming process due to the complexity of the reactionmechanism and the uncertainty of the active ***,wehave proposed combining density functional theory(dFT)andmachine learning(Ml)to investigate the potential of topologicalgraphene-based dual-atom catalysts(dACs)as CO_(2)*** analyzing the Ml results,we identify thenumber of d-orbital electrons in the active site as a key factorinfluencing the CO_(2)RR catalytic ***,wepropose a simple descriptor to measure the CO_(2)RR activity ofthese *** findings provide plausible explanations for thesynergistic interactions between bimetallic atoms in CO_(2)RR andallow us to screen the homogeneous Ni-Ni pair as the mostpromising dual-atom *** work offers a fast Mlapproach based on limited dFT calculations to predict the mostelectroactive and stable dACs on carbon support for CO_(2)RR,facilitating rapid screening of high-performance dual-atomcatalysts.

关键词： CO_(2)reaction reduction dual-atom catalysts density functional theory machine learning

Enhancing low-Frequency Microwave Absorption Through Structural Polarization Modulation of MXenes

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Nano-Micro letters 2024年第10期16卷 435-452页

作者： Bo Shan Yang Wang xinyi Ji Yi huang College of light Industry Science and Engineering State Key Laboratory of Biobased Fiber Manufacturing TechnologyTianjin University of Science and TechnologyTianjin 300457People's Republic of China National Institute for Advanced Materials Tianjin Key Laboratory of Metal and Molecule Based Material ChemistryKey Laboratory of Functional Polymer MaterialsCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)School of Materials Science and EngineeringNankai UniversityTianjin 300350People's Republic of China

Two-dimensional carbon-based materials have shown promising electromagnetic wave absorption capabilities in mid-and high-frequency ranges,but face challenges in low-frequency absorption due to limited control over polarization response mecha-nisms and ambiguous resonance *** this study,we pro-pose a novel approach to enhance absorption efficiency in aligned three-dimensional(3d)MXene/CNF(cellulose nanofibers)cavities by modifying polarization properties and manipulating resonance response in the 3d MXene *** controlled polarization mechanism results in a significant shift of the main absorption region from the X-band to the S-band,leading to a remarkable reflection loss value of-47.9 dB in the low-frequency ***,our findings revealed the importance of the oriented electromagnetic coupling in influencing electromagnetic response and microwave absorption *** present study inspired us to develop a generic strategy for low-frequency tuned absorption in the absence of magnetic element participation,while orientation-induced polarization and the derived magnetic resonance coupling are the key controlling factors of the method.

关键词： Hierarchical structure MXene Microwave absorption low-frequency

Tuning the porosity of {Co12IICo8III（μ3-OH）24（X）}11+ supramolecular frameworks by reaction time for d2/H2 separation

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Science China Chemistry 2025年

作者： Zhuozhou Xie Zhu Zhuo Zi-Ang Nan Qing li Xiufang li Zi-Xiu lu linzhe lü Jin liu luyao liu Wenjing Wang Wei Wang daqiang Yuan You-Gui huang State Key laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences Xiamen Key laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of Sciences State Key laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

Systematicly tuning the porosities of porous materials is crucial for targeted gas mixture separation,yet it remains a longstanding *** a common strategy,altering the phenylene ring count in the organic building units has been exploited to adjust pore apertures in metal organic frameworks （MOFs） and covalent organic frameworks （COFs）,resulting in only a stepwise pore size variation of approximately 2.8?.Unlike MOFs and COFs,the porosities for supramolecular assembly frameworks are highly dependent on the packings of the molecular building units in the *** above strategy cannot be applied to supramolecular assembly frameworks and other strategies are required to adjust pore apertures in supramolecular frameworks,especially to achieve porous materials with the optimal pore size for d2/H2separation （～3?）.Here,we successfully modulate the porosity of supramolecular frameworks of[CoII1+12CoIII8l12（μ3-OH）24（X）]1clusters （l=mono-deprotonated 1-iminoisoindole-3-amine,X=ClO?4or Cl?） by controlling the duration of self-assembly *** simply adjusting the reaction time,we obtain three[CoII12CoIII8l12（μ3-OH）24（X）]11+supramolecular frameworks:[CoII12CoIII8（μ3-OH）24（ClO4）l12)]·（Cl）4·（HCO2）7（1）,[CoII12CoIII8l12（μ3-OH）24（Cl）]·（ClOI4）4·（Cl）6·（HCO2）·（H2O）10（2）,and[CoI12CoIII8l12（μ3-OH）24（Cl）]·（Cl）11·（H2O）12（3）.The different stacking patterns of the[CoII12CoIII8l12（μ3-OH）24（X）]11+clusters in these frameworks lead to significantly varied stabilities and *** 1 exhibits permanent porosity with interconnected channels and maintains stability under harsh *** contrast,compound 2 is nearly nonporous,and compound 3 becomes unstable upon *** pores of compound 1 show higher affinity to d2than H2,and the pore aperture diameter of compound 1 （～3.06?） meets the optimal porosity for d2/***,compound 1 demonstrates moderate d2/H2separation at 77 K (retention time:～7 min/g for d2/H2/Ne （10/10/80 vol%） in a flow of 5 ml

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Investigation and Comparison of 5G Channel Models: From Qua dRi Ga, NYUSIM,and MG5G Perspectives

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Chinese Journal of Electronics 2022年第1期31卷 1-17页

作者： PANG lihua ZHANG Jin ZHANG Yang huang xinyi CHEN Yijian lI Jiandong School of Communication and Information Engineering Xi'an University of Science and Technology State Key laboratory of Integrated Service Networks Xidian University National Mobile Communications Research laboratory Southeast University Algorithm department ZTE Corporation

This paper investigates and compares three channel models for the fifth generation(5 G) wireless communications: the quasi deterministic radio channel generator(Qua dRi Ga), the NYUSIM channel simulator model developed by New York University, and the more general 5 G(MG5 G) channel model. First, the characteristics of the modeling processes of the three models are introduced from the perspective of model ***, the small-scale parameter modeling strategies of the three models are compared from space/time/frequency domains as well as polarization aspect. In particular, the drifting of small-scale parameters is introduced in ***, through the simulation results of angular power spectrum, doppler power spectrum density, temporal autocorrelation function, power delay profile, frequency correlation function, channel capacity, and eigenvalue distribution, the three models are comprehensively investigated. According to the simulation results, we clearly analyze the impact of the modeling strategy on the three channel models and give certain evaluations and suggestion which lay a solid foundation for link and system-level simulations for 5 G transmission algorithms.

关键词： model framework MG5G Perspectives quasideterministic radio channel generator channel capacity QuadRiGa fifth generation wireless communications general 5G channel model 5G transmission algorithms wireless channels NYUSIM channel simulator model frequency correlation function 5G mobile communication power delay profile eigenvalue distribution eigenvalues and eigenfunctions channel models temporal autocorrelation function small-scale parameter angular power spectrum doppler power spectrum density

Effects of Two Potential Allelochemicals on the Photosystem II of Nitzschia closterium and Monostroma nitidum

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Phyton-International Journal of Experimental Botany 2023年第1期92卷 251-269页

作者： Bowen huang Enyi Xie Yu Ran xinyi Chen Yongjian huang Jianjun Cui Fishery College Guangdong Ocean UniversityZhanjiang524088China

In aquaculture,high-density seaweed farming brings higher economic benefits but also increases outbreaks of diatom *** effective control of diatom felt in high-density seaweed farming has always been a research *** study selected two potential allelochemicals 2-hydroxycinnamic acid and quinic acid to explore their effects on a diatom Nitzschia closterium and an economic seaweed Monostroma *** results showed that 2-hydroxycinnamic acid had better inhibitory effects than quinic acid on the growth,pigment content and photosynthetic efficiency of *** half-maximal inhibitory concentrations at 120 h(IC_(50–120 h))were 0.9000 and 1.278 mM,***,these allelochemicals had limited inhibitory effects on the growth,pigment content and photosynthetic efficiency of *** before 24 *** further explore the allelopathic effect of these chemicals,this study focused on the photosystem II energy fluxes of *** was found that 3 mM 2-hydroxycinnamic acid could destroy the whole photosynthetic system by devastating the PSII reaction centre(RC)before 24 h;however,the same concentration of quinic acid could only down-regulate the electron transport efficiency by changing the effective antenna size of an active RC and downregulating the PSII reaction centre *** experimental results are expected to provide a new strategy to control diatom felt blooms on the high-density seaweed farming areas.

关键词： Allelochemicals 2-hydroxycinnamic acid quinic acid Nitzschia closterium Monostroma nitidum photosynthetic system

A"messenger zone hypothesis"based on the visual three-dimensional spatial distribution of motoneurons innervating deep limb muscles

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Neural Regeneration Research 2024年第7期19卷 1559-1567页

作者： Chen huang Shen Wang Jin deng xinyi Gu Shuhang Guo Xiaofeng Yin MoE Key laboratory for Trauma Treatment and Nerve Regeneration Peking UniversityBeijingChina department of Orthopedics and Trauma Peking University People’s HospitalBeijingChina

Coordinated contraction of skeletal muscles relies on selective connections between the muscles and multiple classes of the spinal motoneuro *** r,current research on the spatial location of the spinal motoneurons innervating differe nt muscles is *** this study,we investigated the spatial distribution and relative position of different motoneurons that control the deep muscles of the mouse hindlimbs,which were innervated by the obturator nerve,femoral nerve,inferior gluteal nerve,deep pe roneal nerve,and tibial *** were visualized by combining a multiplex retrograde tracking technique compatible with three-dimensional imaging of solvent-cleared o rgans(3dISCO)and 3-d imaging technology based on lightsheet fluorescence microscopy(lSFM).Additionally,we propose the hypothesis that"messenger zones"exist as interlaced areas between the motoneuron pools that dominate the synergistic or antagonist muscle *** hypothesize that these interlaced neurons may participate in muscle coordination as messenger *** revealed the precise mutual positional relationships among the many motoneurons that innervate different deep muscles of the *** only do these findings update and supplement our knowledge regarding the overall spatial layout of spinal motoneurons that control mouse limb muscles,but they also provide insights into the mechanisms through which muscle activity is coordinated and the architecture of motor circuits.

关键词： 3-d imaging motoneurons multiple retrograde tracing muscle coordination skeletal muscle spatial distribution optical tissue clearing

Numerical Simulation of the Mechanical Stirring Process in a Tannin-Based Foaming Precursor Resin

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Fluid dynamics & Materials Processing 2024年第10期20卷 2219-2234页

作者： lan huang Wenbin Yuan Hisham Essawy Xiaojian Zhou xinyi Chen Yunnan Provincial Key laboratory of Wood Adhesives and Glued Products Southwest Forestry UniversityKunming650224China department of Polymers and Pigments National Research CentreCairo12622Egypt Key laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China Southwest Forestry UniversityKunming650224China

Tannin foam is a new functional *** can be widely applied to the automobile industry,construction industry,and packaging industry due to its wide range of raw materials,renewable,easily degraded,low cost and almost no *** tannin foam is a very complex process that includes high temperature,two phases,mechanical agitation,and phase *** investigate the influence of the stirring velocity and paddle shape,simulation was calculated by making use of the volume of fluid(VOF)method and multiple reference frame(MRF)method in a three-dimensional flow field of tannin-based foaming precursor *** gas holdup and velocity magnitude were analysed with various conditions of mechanical velocities and paddle shape in the stirring flow *** result shows the higher the velocity,the greater the disturbance and paddle shape between the eggbeater and the Rushton turbine,obviously the paddle shape of the eggbeater with a wider range of agitation,which can entrap more air into the tannin-based foaming precursor resin in a short *** when the speed is 1500 rpm,the flow field of the Rushton turbine comes out of a ditch,which decreases the efficiency of mass transfer;there is less air to mix into the tannin-based foaming precursor resin,which causes *** the same time,the eggbeater shows the marvelous capability of hybrid as it has two vortexes and multiple cycles that make a difference from the Rushton turbine,which has only one vortex and two upper and lower loops;the structure makes the flow field more stable allowed evenness of flow field tannin-based foaming precursor *** results reveal that it is beneficial for tannin-based foaming precursor resin to use an eggbeater with a speed of 1500 rpm to reduce the consumption of resources while obtaining a uniform flow field.

关键词： Tannin-based foaming precursor resin mechanical agitation numerical simulation volume of fluid(VOF) multiple reference frame(MRF)

Bi-level Coordinated Planning of Active distribution Network Considering demand Response Resources and Severely Restricted Scenarios

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Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1088-1100页

作者： huang Yixin lin Zhenzhi liu xinyi Yang li dan Yangqing Zhu Yanwei ding Yi Wang Qin College of Electrical Engineering Zhejiang UniversityHangzhouChina State Grid Zhejiang Economic Research Institute HangzhouChina State Grid Ningbo Power Supply Company HangzhouChina Electric Power Research Institute Palo AltoUSA

due to the uncertainty and fluctuation of distributed generation(dG)and load,the operation of active distribution network(AdN)is affected by multi-dimension factors which are described by massive operation *** and accurate screening of severely restricted scenarios(SRSs)has become a new challenge in AdN *** this paper,a novel bi-level coordinated planning model which combines the short-time-scale operation problem with the long-time-scale planning problem is *** the upper level,the demand response(dR)resource,an effective non-component planning resource characterized by low capacity price,high energy price,and short contract term,is co-optimized with the configuration of lines and energy storage systems(ESSs)to achieve the economic trade-off between the investment cost and the operation cost under *** the lower level,with the planning scheme obtained from the upper level,massive operation problems are optimized to minimize the daily operation cost;and the SRSs are provided to the upper level through a shadow-price-based scenario screening method,which simulates the planning information(i.e.,the restricted degrees of operation scenarios)feedback process from AdN operators to AdN *** studies on a 62-node distribution system in Jianshan New district,Zhejiang Province,China,illustrate the effectiveness of the proposed bi-level coordinated planning model considering dR resources and SRSs.

关键词： Active distribution network demand response resource bi-level coordinated planning severely restricted scenario screening shadow price