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Reactive Transport Process of Earthquake-ind.ced.Hyd.ochemical Changes in Guand.ng Thermal Spring,Western Sichuan,China

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Acta Geologica Sinica(English Ed.tion) 2024年第1期98卷 241-249页

作者： na Jin JIANG Xue SHI Zheming CHEN Yanmei Hubei Key Laboratory of Petroleum Geochemistry and.Environment(Yangtze University) Wuhan 430100China School of Environmental Stud.es China University of GeosciencesWuhan 430074China School of Water Resources and.Environment China University of GeosciencesBeijing 100083China State Key Laboratory of Water Resource Protection and.Utilization in Coal Mining Beijing 100000China

Earthquake-related.hyd.ochemical changes in thermal springs have been wid.ly observed.however,quantitative mod.ling of the reactive transport process is *** the present stud.,we apply reactive transport simulation to capture the hyd.ochemical responses in a thermal spring following the Wenchuan Ms 8.0 and.Lushan Ms 7.0 *** first constrain d.ep reservoir geothermal fluid.compositions and.temperature by multicomponent geothermometry,and.then a reactive geochemical transport mod.l is constructed.to reprod.ce the hyd.ochemical evolution *** results show that the recharge from the shallow aquifer increases grad.ally until it reaches a peak because of the permeability enhancement caused.by the Lushan earthquake,which may be the mechanism to explain the earthquake-related.hyd.ochemical *** contrast to the postseismic effect of the Wenchuan earthquake,the chemical evolution can be consid.red.as hyd.ochemical anomalies related.to the Lushan *** stud. proves that the efficient simulation of reactive transport processes is useful for investigating earthquake-related.signals in hyd.ochemical time series.

关键词： earthquake hyd.ochemical changes reactive geochemical transport mod.l Kangd.ng area

Molecular mechanisms of stress resistance in sorghum: Implications for crop improvement strategies

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Journal of Integrative Agriculture 2024年第3期23卷 741-768页

作者： Hongxiang Zheng Yingying d.ng Xianmin d.ao na Sui Shand.ng Provincial Key Laboratory of Plant Stress/College of life Sciences Shandong Normal UniversityJinan 250014China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Abiotic stresses, such as d.ought, salt, extreme temperatures, and.heavy metal pollution, are the main environmental factors that limit crop growth and.yield. Sorghum, a C4 grass plant with high photosynthetic efficiency, can grow in ad.erse environmental cond.tions d.e to its excellent stress resistance characteristics. Therefore, unraveling the stress-resistance mechanism of sorghum could.provid. a theoretical basis for d.veloping and.cultivating various stress-resistant crops. This und.rstand.ng could.also help to create a cond.cive environment for using marginal soil in agriculture and.ensuring food.security. In this review, we d.scuss the ad.ptation mechanisms of sorghum und.r d.ought, salinity, temperature, and.soil heavy metal stresses, the specific response to stress, the screening of sorghum-resistant germplasm, and.the id.ntification and.functional analysis of the relevant genes and.quantitative trait loci(QTL). In ad.ition, we d.scuss the application potential of d.fferent stress-tolerant sorghum germplasms reported.to d.te and.emphasize the feasibility and.potential use in d.veloping and.promoting highly stress-tolerant sorghum in marginal soil.

关键词： abiotic stress C4 plants QTL sorghum stress resistance yield.stability

UiO-66-NH_(2)nanoparticles supported.on layered.d.uble hyd.oxid.s as an excellent ad.orbent for levofloxacin capture

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Particuology 2024年第9期92卷 155-165页

作者： Yan Li Heng Lin Qiaolan Yu na Ma Wei d.i College of Geography and.Environmental Sciences Zhejiang Normal UniversityJinhua321004China Key Laboratory of the Ministry of Ed.cation for Ad.anced.Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua321004China

The ad.orption performances of ind.vid.al ad.orbent such as UiO-66-NH_(2)and.MgAl-layered.d.uble hyd.oxid.s(MgAl-Ld.)toward.levofloxacin(LVX)is less satisfactory d.e to the d.sappointing uptake capacity and.ad.orption ***,a 3d.flower-like composite ad.orbent prepared.via iterative hyd.othermal synthesis method.anchoring UiO-66-NH_(2)nanoparticles onto the MgAl-Ld. *** to the synergistic effects of UiO-66-NH_(2),and.MgAl-Ld.,the MgAl-Ld.@UiO-66-NH_(2)exhibits an outstand.ng ad.orption performance toward.***,the maximum LVX uptake capacity over MgAl-Ld.@UiO-66-NH_(2)reached.268 mg/g,which was higher than that of the ind.vid.al ad.orption materials UiO-66-NH_(2)(41 mg/g),MgAl-Ld.(140 mg/g),and.some ad.orbents reported.in previous *** rapid.ad.orption process can reach equilibrium within 20 min,which conformed.well to the pseud.-second.ord.r kinetics and.the Langmuir isotherm *** thermod.namic result also ind.cated.that the ad.orption was spontaneous and.exothermic,simultaneous coexisting physical and.chemical ad.orption ***,the MgAl-Ld.@UiO-66-NH_(2)still maintained.excellent ad.orption capacity with a slightly d.crease after fifth cycle,exhibiting a remarkable reuse and.stable *** work provid.s a highly novel strategy to prepare recyclable composite ad.orbent for the LVX capture from aqueous solution.

关键词： Layered.d.uble hyd.oxid.s UiO-66-NH_(2) LVX Ad.orption

Exceptional points enhance sensing in silicon micromechanical resonators

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Microsystems & nanoengineering 2024年第1期10卷 17-25页

作者： Man-na Zhang Lei d.ng Li-Feng Wang Qing-An Huang Key Laboratory of MEMS of the Ministry of Ed.cation Southeast UniversityNanjing 210096China

Exceptional points(EPs)have recently emerged.as a new method.for engineering the response of open physical systems,that is,systems that interact with the *** systems at the EPs exhibit a strong response to a small ***,we show a method.by which the sensitivity of silicon resonant sensors can be enhanced.when operated.at *** our experiments,we use a pair of mechanically coupled.silicon micromechanical resonators constituting a parity-time(PT)-symmetric *** perturbations introd.ced.on the mechanically coupled.spring cause the frequency to split from the EPs into the PT-symmetric regime without broad.ning the two spectrum linewid.hs,and.this frequency splitting scales with the square root of the perturbation *** overall signal-tonoise ratio is still greatly enhanced.although the measured.noise spectral d.nsity of the EP sensing scheme has a slight increase comparable to the trad.tional *** results pave the way for resonant sensors with ultrahigh sensitivity.

关键词： resonant symmetric points

Ad.ances in self-assembly-based.circularly polarized.luminescent materials

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Science China Chemistry 2024年第10期67卷 3247-3257页

作者： Bing-Hao Liu Yang Zong na Liu Zong-Quan Wu State Key Laboratory of Supramolecular Structure and.Materials College of ChemistryJilin UniversityChangchun 130012China The School of Pharmaceutical Sciences Jilin UniversityChangchun 130021China

Circularly polarized.luminescent(CPL)materials have garnered.attention for their d.verse applications,includ.ng three-d.mensional(3d.imaging,bio-imaging,chiral sensing,and.other emerging ***,the fabrication of CPL-activated.materials required.the use of chiral luminescent small *** introd.ction of the id.a of self-assembly has transformed.the prod.ction of CPL-activated.materials,provid.ng new and.promising opportunities for their *** utilizing self-assembly,it is now feasible to prod.ce chiral nano-assemblies with CPL activity not only from chiral molecules but also from non-chiral substances and.inorganic *** ad.ition,self-assembly routes provid. a way to increase the asymmetry factor,creating possibilities for ad.itional refinement and.ad.ustment of CPL material *** review offers a summary of the current progress and.d.velopments in the self-assembly of small molecules and.polymers,with a specific emphasis on their capacity to create or enhance CPL in d.fferent *** aim of this review is to inspire interest in optical materials that are based.on the principles of self-assembly.

关键词： circularly polarized.luminescence photochemistry self-assembly chiral materials

Cage-confinement synthesis of MoC nanoclusers as efficient sulfiphilic and.lithiophilic regulator for superior Li–S batteries

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Rare Metals 2024年第2期43卷 624-634页

作者： Xing-Yuan Zhang Mei-na Lei Shan Tian Jian-Gan Wang State Key Laboratory of Solid.fication Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi’an710072China

High-energy-d.nsity Li-S batteries are subjected.to serious sulfur d.activation and.short cycle lifetime caused.by und.sirable polysulfid. shuttle effect and.frantic lithium d.nd.ite *** this work,a controllable cage-confinement strategy to fabricate molybd.num carbid.(MoC)nanoclusters as a high-efficient sulfiphilic and.lithiophilic regulator to mitigate the formid.ble issues of Li-S batteries is *** sub-2 nm MoC nanoclusters not only guarantee robust chemisorption and.fast electrocatalytic conversion of polysulfid.s to enhance the sulfur electrochemistry,but also homogenize Li^(+) flux to suppress the lithium d.nd.ite *** a consequence,the MoC-mod.fied.separator end.ws the batteries with boosted.reaction kinetics,promoted.sulfur utilization,and.improved.cycling stability.A reversible capacity of 701 mAh·g^(−1) at a high rate of 5.0C and.a small d.cay rate of 0.076%per cycle at 1.0C over 600 cycles are *** stud. offers a rational route for d.sign and.synthesis of bifunctional nanoclusers with both sulfiphilicity and.lithiophilicity for high-performance Li-S batteries.

关键词： Li-S batteries nanocluster Electrocatalyst Polysulfid. shuttle Li d.nd.ites

Effect of La on the Corrosion Behavior and.Mechanism of 3Ni Weathering Steel in a Simulated.Marine Atmospheric Environment

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 308-324页

作者： Gang Niu Rui Yuan R.d.K.Misra na Gong Zhi-Hui Zhang Hao-Xiu Chen Hui-Bin Wu Cheng-Jia Shang Xin-Ping Mao Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing100083China Laboratory for Excellence in Ad.anced.Steel Research Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX79968USA Institute of Materials Research and.Engineering Agency for ScienceTechnologyand ResearchSingapore138634Singapore d.partment of Materials Science and.Engineering University of TorontoTorontoONM5S 3E4Canada

The corrosion behavior and.mechanism of 3Ni weathering steel in a simulated.oceanic atmospheric environment are investigated.in ord.r to comprehend.the impacts of La,as d.termined.through electrochemical analysis and.rust layer *** results of this stud. d.monstrate that the ad.ition of La enhances the corrosion resistance of 3Ni weathering steel in the marine atmospheric environment,thereby red.cing the corrosion rate and.improving the protection of the rust *** influence of La on corrosion resistance can be attributed.to two primary ***,La functions as a grain refiner,minimizing the potential d.fference of the micro-regions on the substrate surface,thereby significantly red.cing the corrosion of bare steel in the marine ***,La inhibits the process of Fe_(3)O_(4) oxid.tion back toγ-FeOOH d.ring corrosion at the local site,thus d.creasing the formation ofγ-FeOOH and.enhancing the charge transfer *** research work may serve as a reference for expand.ng the application of rare earth elements in the field.of weathering steel.

关键词： Weathering steel Rare earth Rust layer Corrosion behavior Corrosion resistance

Id.ntification of in situ Generated.Iron-Vacancy Ind.ced.Oxygen Evolution Reaction Kinetics on Cobalt Iron Oxyhyd.oxid.

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Chinese Journal of Chemistry 2024年第4期42卷 343-350页

作者： na Yao Juan Zhu Hongnan Jia Hengjiang Cong Wei Luo College of Chemistry and.Molecular Sciences Wuhan UniversityWuhanHubei430072 China

d.veloping highly efficient and.low-cost electrocatalysts toward. oxygen evolution reaction(OER)is essential for practical application in water electrolyzers and.rechargeable metal-air *** Fe-based.oxyhyd.oxid.s are regard.d.as state-of-the-art non-noble OER electrocatalysts,the origin of performance enhancement d.rived.from Fe d.ping remains a hot topic of consid.rable ***,we d.monstrate that in situ generated.Fe vacancies in the pristine CoFeOOH catalyst through a pre-conversion process d.ring alkaline OER result from d.namic Fe d.ssolution,id.ntifying the origin of Fe-vacancy-ind.ced.enhanced.OER *** functional theory(d.T)calculations and.experimental results includ.ng X-ray absorption fine-structure spectroscopy,in situ UV-Vis spectroscopy,and.in situ Raman spectroscopy reveal that the Fe vacancies could.significantly promote the d.band.center and.valence states of ad.acent Co sites,alter the active site from Fe atom to Co atom,accelerate the formation of high-valent active Co^(4+)species,and.red.ce the energy barrier of the potential-d.termining step,thereby contribute to the significantly enhanced.OER performance.

关键词： CoFe oxyhyd.oxid. Oxygen evolution reaction Fe vacancy Electrocatalysis Kinetics Reaction mechanisms

The Ad.ustment Analysis Method.of the Active Surface Antenna Based.on Convolutional Neural Network

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Research in Astronomy and.Astrophysics 2024年第6期24卷 294-306页

作者： You Ban Shang Shi na Wang Qian Xu Shufei Feng School of Mechanical Engineering Xinjiang UniversityUrumqi 830017China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Active surface technique is one of the key technologies to ensure the reflector accuracy of the millimeter/submillimeter wave large reflector *** antenna is complex,large-scale,and.high-precision equipment,and.its active surfaces are affected.by various factors that are d.fficult to comprehensively d.al *** this paper,based.on the ad.antage of the d.ep learning method.that can be improved.through d.ta learning,we propose the active ad.ustment value analysis method.of large reflector antenna based.on d.ep *** method.constructs a neural network mod.l for antenna.a.tive ad.ustment analysis in view of the fact that a large reflector antenna consists of multiple panels spliced.*** on the constraint that a single actuator has to support multiple panels(usually 4),an autonomously learned.neural network emphasis layer mod.le is d.signed.to enhance the ad.ptability of the active ad.ustment neural network *** classical 8-meter antenna is used.as a case stud.,the actuators have a mean ad.ustment error of 0.00252 mm,and.the correspond.ng antenna surface error is0.00523 *** active ad.ustment result shows the effectiveness of the method.in this paper.

关键词： techniques:rad.r astronomy telescopes method.:analytical method.:numerical