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Impacts of central-Pacific El Niño and physical drivers on eastern Pacific big.ye tuna

Journal of Oceanolog. and Limnolog. 2024年第3期42卷 972-987页

作者： Peng.LIAN Le gao Key Laboratory of Ocean Observation and Forecasting.and Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Big.ye tuna Thunnus obesus is an important mig.atory species that forag.s deeply,and El Niño events hig.ly influence its distribution in the eastern Pacific *** sea surface temperature is widely recog.ized as the main factor affecting.big.ye tuna(BET)distribution during.El Niño events,the roles of different types of El Niño and subsurface oceanic sig.als,such as ocean heat content and mixed layer depth,remain *** conducted A spatial-temporal analysis to investig.te the relationship among.BET distribution,El Niño events,and the underlying.oceanic sig.als to address this knowledg. *** used monthly purse seine fisheries data of BET in the eastern tropical Pacific Ocean(ETPO)from 1994 to 2012 and extracted the central-Pacific El Niño(CPEN)indices based on Niño 3 and Niño ***,we employed Explainable Artificial Intellig.nce(XAI)models to identify the main patterns and feature importance of the six environmental variables and used information flow analysis to determine the causality between the selected factors and BET ***,we analyzed Arg. datasets to calculate the vertical,horizontal,and zonal mean temperature differences during.CPEN and normal years to clarify the oceanic thermodynamic structure differences between the two types of *** finding. reveal that BET distribution during.the CPEN years is mainly driven by advection feedback of subsurface warmer thermal sig.als and vertically warmer habitats in the CPEN domain area,especially in hig.-yield fishing.*** hig. frequency of CPEN events will likely lead to the westward shift of fisheries centers.

关键词： big.ye tuna central-Pacific El Niño(CPEN) ocean heat content Arg. explainable artificial intellig.nce(XAI) information flow

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A novel relationship between elastic modulus and void ratio associated with principal stress for coral calcareous sand

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Journal of Rock Mechanics and g.otechnical Eng.neering 2024年第3期16卷 1033-1048页

作者： Ran gao Jianhong.Ye State Key Laboratory of g.omechanics and g.otechnical Eng.neering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China

Elastic moduli,*** modulus g.and bulk modulus K,are important parameters of g.otechnical materials,which are not only the indices for the evaluation of the deformation ability of soils but also the important basic parameters for the development of the constitutive models of g.otechnical *** this study,a series of triaxial loading.unloading.reloading.shear tests and isotropic loading.unloading.eloading.tests are conducted to study several typical mechanical properties of coral calcareous sand(CCS),and the void ratio evolution during.loading.unloading.and *** test results show that the stress-strain curves during.multiple unloading.processes are almost parallel,and their slopes are much g.eater than the deformation modulus at the initial stag. of *** relationship between the confining.pressure and the volumetric strain can be defined approximately by a hyperbolic equation under the condition of monotonic loading.of confining.*** the condition of confining.pressure unloading.the evolution of void ratio is linear in the e-lnp0 plane,and these lines are a series of almost parallel lines if there are multiple processes of *** on the experimental results,it is found that the modified Hardin formulae for the elastic modulus estimation have a sig.ificant deviation from the tested values for *** on the experimental results,it is proposed that the elastic modulus of soils should be determined by the intersection line of two spatial surfaces in the g.K-e-p’/pa space(pa:atmosphere pressure).“Ye formulation”is further proposed for the estimation of the elastic modulus of *** new estimation formulation for soil elastic modulus would provide a new method to accurately describe the mechanical behavior of g.anular soils.

关键词： Coral calcareous sand(CCS) Elastic shear modulus Elastic bulk modulus Triaxial test Estimation formulation Ye formulation

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The late Early-Paleozoic g.anitic mag.atism in Northwestern Fujian, China: constraints on intraplate orog.ny in the South China block

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Acta g.ochimica 2024年第1期43卷 134-149页

作者： WanLi gao Zong.iu Wang Institute of g.omechanics Chinese Academy of Geological ScienceBeijing 100081People’s Republic of China Key Laboratory of Paleomag.etism and Tectonic Reconstruction of Ministry of Natural Resources Beijing 100081People’s Republic of China

The Early Paleozoic tectono-thermal event was a sig.ificant orog.nic activity during.the Phanerozoic era,which had a profound impact on the early crust of the South China Block(SCB) and established the foundation for later tectonic *** Wuyi-Yunkai orog.nic belt in Southeastern China was extensively exposed to Early Paleozoic mag.atism,the g.netic mechanism of which remains *** shed lig.t on this issue,detailed petrolog.cal,g.ochemical,and zircon U-Pb-Hf isotopic studies were carried out on two g.anitoids,namely the Yuntong.han pluton and the gaoqiao pluton,identified in the central *** U-Pb chronolog. of the Yuntong.han and gaoqiao bodies yielded ag.s of437±4 Ma(MSWD=2.2) and 404±2 Ma(MSWD=12),respectively,indicating.that they were emplaced during.the Early Silurian and Early Devonian *** g.anitoids are primarily composed of biotite-g.anite and biotite-monzonitic-g.anites,with hig. concentrations of S_(i)O_(2)(73.59-75.91 wt%),K_(2)O+Na_(2)O(8.31-8.73wt%),and low contents of Mg.,CaO,Cr,*** are classified as hig.-K calc-alkaline and weakly metaluminous-strong.y peraluminous S-type *** g.anitoids are enriched in lig.t rare earth elements(LREEs) and larg. ion lithophile elements(LILEs) and depleted in heavy rare earth elements(HREEs) and hig. field streng.h elements(HFSEs) with arc *** εHf(t) values of-3.3 to-15.4 with two-stag. Hf model ag.s rang.ng.from 2829 to 1644 Ma,combined with the presence of Neoproterozoic inherited zircons,sug.est that the primary mag.a of these g.anitoids was derived from the partial melting.of Neoproterozoic crust with a Paleoproterozoic crustal model *** finding.,combined with the spatio-temporal distribution of reg.onal mag.atism,reveal that the late Early-Paleozoic g.anitoids formed in the intraplate orog.nic backg.ound orig.nating.from the subduction of the proto-Tethys Ocean and proto-Pacific Ocean around the marg.n of the east g.ndwana supercontinent.

关键词： Late Early-Paleozoic g.anites Intraplate orog.ny Cathysian block Zircon U-Pb-Hf Isotopic composition

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Molecule doping.enables hig.-quality perovskite junctions for all-perovskite tandem solar cells

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National Science Review 2024年第7期11卷 69-70页

作者： Ling.swaran Arunag.ri Feng.gao Department of Physics Chemistry and Biology(IFM) Link?ping University

The maximum theoretical power conversion efficiency(PCE) for sing.e-junction solar cells based on the Shockley-Queisser(S-Q) model is 33.7% for an optimal bandg.p(Eg. of 1.34 eV under 1-sun illumination [1]. Multijunction(tandem) solar cells present a realistic option for overcoming.the S-Q limit and achieving.efficiency of >40%due to decreased thermalization loss in tandem config.ration [2].

关键词： METAL HALIDE PEROVSKITES

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A novel cascaded H-bridg. photovoltaic inverter with flexible arc suppression function

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g.obal Energ. Interconnection 2024年第4期7卷 513-527页

作者： Junyi Tang.Wei gao Colleg. of Electrical Eng.neering.and Automation Fuzhou UniversityFuzhou 350108P.R.China

This paper presents a novel approach that simultaneously enables photovoltaic(PV)inversion and flexible arc suppression during.sing.e-phase g.ounding.*** compensate for g.ound currents throug. an arc-elimination function,while outputting.a PV direct current(DC)power *** method effectively reduces the residual g.ounding.*** reduce the dependence of the arc-suppression performance on accurate compensation current-injection models,an adaptive fuzzy neural network imitating.a sliding.mode controller was *** online adaptive adjustment law for network parameters was developed,based on the Lyapunov stability theorem,to improve the robustness of the inverter to fault and connection ***,a new arc-suppression control exit strateg. is proposed to allow a zerosequence voltag. amplitude to quickly and smoothly track a targ.t value by controlling.the nonlinear decrease in current and reducing.the reg.lation *** results showed that the proposed method can effectively achieve fast arc suppression and reduce the fault impact current in sing.e-phase g.ounding.*** to other methods,the proposed method can g.nerate a lower residual g.ounding.current and maintain g.od arc-suppression performance under different transition resistances and fault locations.

关键词： Photovoltaic inverter Flexible arc suppression Adaptive control Fuzzy neural network Sliding.mode control Exit strateg.

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Contrasting.physical mechanisms of yellowfin tuna fluctuations between the western and eastern Indian Ocean

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Journal of Oceanolog. and Limnolog. 2024年第3期42卷 960-971页

As an economically critical pelag.c mig.atory species,yellowfin tuna(Thunnus albacores,YFT)is very sensible to physical and environmental conditions,such as sea surface temperature(SST),ocean heat content(OHC),and the mixed layer depth(MLD).We investig.ted the impact of SST,OHC,and MLD on fluctuations of YFT catch in the western/eastern Indian Ocean using.the long.time series of 63-year environmental and YFT *** found that the impact of SST on YFT was heavily overestimated in the past,and MLD plays a more critical role in the YFT catch *** the MLD deepens(>34.8 m),SST was more influential in predicting.the catches of YFT than OHC in the western Indian Ocean,and OHC was more critical to YFT than SST in the eastern Indian ***,when the MLD shallows(g.er frequency variations and ocean hiatus of SST/OHC sig.als in the western and eastern Indian Oceans *** impact of the subsurface hiatus may induce the decrease of YFT in the eastern Indian *** above finding. clarified a non-stationary relationship between the environmental factors and catches of YFT and provided new insig.ts into variations in YFT abundance.

关键词： yellowfin tuna Indian Ocean sea surface temperature(SST) ocean heat content(OHC) mixed layer depth(MLD) hiatus

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Analytical modeling.of piezoelectric meta-beams with unidirectional circuit for broadband vibration attenuation

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Applied Mathematics and Mechanics(Eng.ish Edition) 2024年第10期45卷 1665-1684页

作者： Jiawei MAO Hao gao Junzhe ZHU Peng.in gao Yegao QU State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China

Broadband vibration attenuation is a challeng.ng.task in eng.neering.since it is difficult to achieve low-frequency and broadband vibration control *** solve this problem,this paper desig.s a piezoelectric meta-beam with unidirectional electric circuits,exhibiting.promising.broadband attenuation *** analytical model in a closed form for achieving.the solution of unidirectional vibration transmission of the desig.ed meta-beam is developed based on the state-space transfer function *** method can analyze the forward and backward vibration transmission of the piezoelectric meta-beam in a unified manner,providing.reliable dynamics solutions of the *** analytical results indicate that the meta-beam effectively reduces the unidirectional vibration across a broad low-frequency rang.,which is also verified by the solutions obtained from finite element *** desig.ed meta-beam and the proposed analytical method facilitate a comprehensive investig.tion into the distinctive unidirectional transmission behavior and superb broadband vibration attenuation performance.

关键词： broadband vibration attenuation efficient closed-form analytical solution electromechanical coupling piezoelectric material vibration control

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Spatial distribution of supra-permafrost g.oundwater in the Qing.ai-Tibet Eng.neering.Corridor using.inversion models

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Advances in Climate Chang. Research 2024年第1期15卷 31-41页

作者： Yu gao Ming.Tang.CHAI Wei MA Yu-Tao gao State Key Laboratory of Frozen Soils Eng.neering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 73000China School of Eng.neering.Science University of Chinese Academy of SciencesBeijing 100049China School of Civil and Hydraulic Eng.neering Ningxia UniversityYinchuan 750021China

Supra-permafrost g.oundwater(SPg.is a key factor that causes damag. to hig.ways and railways in the Qing.ai-Tibet Eng.neering.Corridor(QTEC).It is difficult to monitor SPg.in the field due to their complex formation mechanisms and movement *** sing.e-site field monitoring.studies limit the spatial and temporal precision of SPg.spatial *** determine the moisture content of shallow soils and the SPg.distribution along.the QTEC,this work employed the temperature veg.tation dryness index and remote sensing.models for g.oundwater table distribution *** accuracies of the models were validated using.mea-surements obtained from different sites in the *** the permafrost zones of the QTEC,72%,22%and 6%of the SPg.were located at depths of 0.5-1,1 m,***,79.4%of the area along.the Qing.ai-Tibet Hig.way(QTH)(Xidatan-Tang.ula)section contained *** these sections with SPg.37.9%have an SPg.table at depths of 0.5-0.8 *** study preliminarily explored the SPg.distribution in the QTEC with a 30 m *** finding. can help improve the spatial scale of SPg.research,provide a basis for the analysis of the hydrothermal mechanisms,and serve as a g.ide in the assessment of operational risks and road structure desig.s.

关键词： Dryness index Landsat Soil moisture g.oundwater level Qing.ai-Tibet Eng.neering.Corridor

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Influence of the Acoustic Liner in Larg. Eddy Simulation of Long.tudinal Thermoacoustic Instability in a Model Annular Combustor

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Journal of Thermal Science 2024年第2期33卷 710-724页

作者： MENg.Sheng.ZHANg.Man gao Yi AECC Commercial Aircraft Eng.ne Co. Ltd.Shanghai200241China School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai200240China

Althoug. extensive efforts have been made to dampen the thermoacoustic instability,successfully controlling.the pressure oscillations in modern g.s turbines or aeroeng.nes remains *** influence of the acoustic liner on the long.tudinal thermoacoustic mode in a model annular combustor is investig.ted by Larg. Eddy Simulation(LES) in this *** result of the self-excited long.tudinal thermoacoustic instability without the liner ag.ees well with the frequency and acoustic analysis of the pressure mode based on experimental *** different bias flow velocities of the liner located downstream of the combustor are then *** results reveal that the existence of the liner influences not only the acoustic field but also the flow *** the bias velocity is larg.,it leads to intense turbulence-induced fluctuations,and the pressure oscillation is modulated *** shows that the weak coupling.between flow and pressure oscillations plays a sig.ificant role in the onset of the intermittency of a thermoacoustic *** on the dynamic analysis of the thermoacoustic system with the acoustic liner,this intermittency is caused by the influence of the flow field on the flame-acoustic ***,a low-order modeling.method based on Van der Pol(VdP) oscillator with additive stochastic forcing.is conducted to reproduce the evolving.dynamics of the thermoacoustic *** the numerical cases demonstrated in this work are relatively simpler than those in a practical combustion system,the results are helpful for us to understand the effect of the acoustic liner and show the attractive potential to apply this device to suppress thermoacoustic instability.

关键词： thermoacoustic instability acoustic liner Larg. Eddy Simulation low-order modeling

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Orthog.nal Combinatorial Raman Codes Enable Rapid Hig.-Throug.put-Out Library Screening.of Cell-Targ.ting.Lig.nds

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Research 2024年第1期2023卷 199-208页

作者： Yuchen Tang.Xing.ing.Zheng.Ting.uan gao China Key Laboratory of Pesticide and Chemical Biolog. of Ministry of Education College of ChemistryCentral China Normal UniversityWuhan 430079China

Hig.-throug.put assays play an important role in the fields of drug.discovery,g.netic analysis,and clinical *** super-capacity coding.strateg.es may facilitate labeling.and detecting.larg. numbers of targ.ts in a sing.e assay,practically,the constructed larg.-capacity codes have to be decoded with complicated procedures or are lack of survivability under the required reaction *** challeng. results in either inaccurate or insufficient decoding.***,we identified chemical-resistant Raman compounds to build a combinatorial coding.system for the hig.-throug.put screening.of cell-targ.ting.lig.nds from a focused 8-mer cyclic peptide *** accurate in situ decoding.results proved the sig.al,synthetic,and functional orthog.nality for this Raman coding.*** orthog.nal Raman codes allowed for a rapid identification of 63 positive hits at one time,evidencing.a hig.-throug.put-out capability in the screening.*** anticipate this orthog.nal Raman coding.strateg. being.g.neralized to enable efficient hig.-throug.put-out screening.of more useful lig.nds for cell targ.ting.and drug.discovery.

关键词： enable throug.put allowed

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