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Lif.time-tunable circularly polarized luminescent system based on triplet-to-singlet f.rster resonance energy transf.r

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Science China Chemistry 2024年第9期67卷 2918-2922页

作者： Zhenyi He Zizhao Huang Xiang ma Key Laboratory f.r Advanced materials and f.ringa Nobel Prize Scientist Joint Research Center Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Circularly polarized luminescence(CPL)materials have received widespread attention due to their remarkable perf.rmance and broad ***,current CPL material research primarily f.cuses on tunable color,intensity,and *** CPL with adjustable lif.time remains a signif.cant ***,a series of.CPL polymeric materials with tunable lif.time were obtained by employing phosphorescent terephthalic acid and chiral organic small molecule R/S-BNAf.a luminescent binaphthol derivative)to copolymerize with acrylamide in dif.erent *** was verif.ed that this perf.rmance results f.om the dif.erent energy transf.r ef.iciency between luminophores with varying ratios of.the monomers f.r *** strategy to realize CPL with tunable lif.time by modulating the energy transf.r ef.iciency will provide a new perspective to broaden the applications of.CPL materials.

关键词： circularly polarized luminescence tunable lif.time f.rster resonance energy transf.r room temperature phosphorescence

Alloy/layer double hydroxide interphasic synergy via nano-heterointerf.cing f.r highly reversible CO_(2)redox reaction in Li-CO_(2)batteries

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Nano Research 2024年第6期17卷 5206-5215页

作者： tianzhen Jian Wenqing ma Jiagang Hou Jianping ma Xianhong Li Haiyang Gao Caixia Xu Hong Liu Institute f.r Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China Kyiv College at Qilu University of.Technology Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China State Key Laboratory of.Crystal materials Shandong UniversityJinan 250100China Shandong Sacred Sun Power Sources Co. Ltd.Qufu 273100China

Li-CO_(2)batteries are among the most intriguing techniques f.r balancing the carbon cycle,but are challenged by the annoyed thermodynamic barrier of.the Li_(2)CO_(3)decomposition ***,we demonstrate the electrocatalytic perf.rmances of.two-dimensional(2D)CoAl-layer double hydroxide(LDH)nanosheets can be signif.cantly improved by trans-dimensional crosslinking with three-dimensional(3D)multilevel nanoporous(MP)-RuCoAl alloy(MP-RuCoAl alloy⊥CoAl-LDH).The MP-RuCoAl alloy⊥CoAl-LDH with multiscale pore channels and abundant nano-heterointerf.ce is directly prepared by controllable etching Al f.om a Ru-Co-Al master alloy along with simultaneous partial oxidization of.Al and Co *** MP-RuCoAl is composed of.various intermetallic compounds and Ru with abundant grain boundaries,and f.rms numerous heterointerf.ce with 2D CoAl-LDH *** multiscale porous metallic network benef.ts mass and electron transportation as well as discharge product storage and enables a rich multiphase reaction *** situ dif.erential electrochemical mass spectrometry shows that the mass-to-charge ratio in the charging process is~0.733 which is consistent with the theoretical value of.3/4,stating that the reversible co-decomposition of.Li_(2)CO_(3)and C can be achieved with the MP-RuCoAl alloy⊥*** Ketjen black(KB)/MP-RuCoAl⊥CoAl-LDH battery demonstrates a high cyclability f.r over 2270 h(227 cycles)with a lower voltage gap stabilized at~1.3 V at 200 ma·g^(−1).Our f.ndings here provide usef.l guidelines f.r developing high ef.iciency transition metal based electrocatalysts by coupling with conductive porous substrate f.r impelling the development of.practical Li-CO_(2)battery systems.

关键词： heterojunction interf.ce nanoporous Li-CO_(2)battery dealloying

An adaptive energy regulation in a memristive map linearized f.om a circuit with two memristive channels

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Communications in Theoretical Physics 2024年第3期76卷 42-50页

作者： f.if.i Yang Ping Zhou Jun ma School of.Science Chongqing University of Posts and TelecommunicationsChongqing 430065China College of.Electrical and Inf.rmation Engineering Lanzhou University of TechnologyLanzhou 730050China Department of.Physics Lanzhou University of TechnologyLanzhou 730050China

Nonlinear circuits can show multistability when a magnetic f.ux-dependent memristor(Mf.M) or a charge-sensitive memristor(CSM) is incorporated into a one branch circuit,which helps estimate magnetic or electric f.eld *** this paper,two dif.erent kinds of.memristors are incorporated into two branch circuits composed of.a capacitor and a nonlinear resistor,thus a memristive circuit with double memristive channels is *** circuit equations are presented,and the dynamics in this oscillator with two memristive terms are ***,the memristive oscillator is converted into a memristive map by applying linear transf.rmation on the sampled time series f.r the memristive *** Hamilton energy f.nction f.r the memristive oscillator is obtained by using the Helmholtz theorem,and it can be mapped f.om the f.eld energy of.the memristive *** energy f.nction f.r the dual memristive map is suggested by imposing suitable weights on the discrete energy *** dynamical behaviors of.the new memristive map are investigated,and an adaptive law is proposed to regulate the f.ring mode in the memristive *** work will provide a theoretical basis and experimental guidance f.r oscillator-to-map transf.rmation and discrete map energy calculation.

关键词： Hamilton energy dual memristive map adaptive energy regulation

Provenance of.Conglomerate and Sandstone f.om Early Permian Shoushangou f.rmation in Xi Ujimqin,Inner Mongolia:Implications f.r Understanding Paleo-Asian Ocean Subduction

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 10-31页

作者： ZHANG Yingli GUO Xianqing ma Shouxian MNR Key Laboratory of.Metallogeny and Mineral Assessment Institute of Mineral ResourcesCAGSBeijing 100037China Chinese Academy of.Geological Sciences Beijing 100037China

During the Late Carbonif.rous to Early Permian,a rif. was f.rmed by post-collisional extension af.er ocean closure or an island arc-related basin f.rmed by Paleo-Asian Ocean(PAO)subduction in the Xi Ujimqin ***,the closure time of.the PAO is still under ***,to identif. the origin of.the PAO,the geochemistry and U-Pb age of.zircons were analyzed f.r the extra-large deep marine,polymict clastic boulders and sandstones in the Shoushangou f.rmation within the *** analyses revealed magmatic activity and tectonic *** conglomerates include megaclasts of.granite(298.8±9.1 ma)and granodiorite porphyry(297.1±3.1 ma),which were deposited by muddy debris *** of.this study demonstrated that the boulders of.granitoids have the geochemistry of.typical I-type granite,characterized by low Zr+Nb+Ce+Y and low Ga/Al *** granitoid boulders were f.rmed in island arc setting,indicating the presence of.arc magmatism in the area that is composed of.the Late Carbonif.rous to Early Permian subduction-related granitoid in southern Xi *** diagrams f.r determining sedimentary provenance using major and trace elements indicate that Shoushangou sediments originated f.om continental island arc-related f.lsic *** zircon U-Pb age cluster of.330–280 ma was obtained,indicating input f.om granite,ophiolite,Xilin Gol complex,and Carbonif.rous sources to the *** basin was geographically developed behind the arc during the Early Permian period because the outcropped intrusive rocks in the Late Carbonif.rous to Early Permian f.rm a volcanic *** comprehensive analyses of.source areas suggest that Shoushangou sediments developed in a backarc basin in response to the northward subduction of.the *** backarc basin and intrusive rocks,in addition to previously published Late Carbonif.rous to Early Permian magmatic rocks of.arc unit in Xilin Gol,conf.rm the presence of.an Early Permian trencharc-basin system in the region,r

关键词： provenance analysis backarc basin Shoushangou f.rmation Early Permian Central Asian Orogenic Belt

Inf.uences of.Graupel Microphysics on Cma-Gf. Simulation of.Summer Regional Precipitation

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Journal of.Meteorological Research 2024年第1期38卷 27-38页

作者： Zhe LI Qijun LIU Zhanshan ma Cma Earth System Modeling and Prediction Centre China Meteorological Administration(CMA)Beijing 100081

The horizontal resolution of.global numerical weather prediction models is continuously developing. However, due to the imperf.ct precipitation simulation/f.recast of.these models, the demand f.r considering riming particles in cloud microphysical schemes in these models is increasing. This study employed the latest versions of.global atmospheric reanalysis data (ERA5), the satellite retrieval data of.the Global Precipitation Observation Program (GPM),and station precipitation observations to explore the impacts of.adding graupel to the cloud microphysical scheme in the China Meteorological Administration-Global f.recast System (Cma-Gf.) on summer regional precipitation simulations in f.ur Chinese climate zones. The results verif. that the new graupel scheme can enable Cma-Gf. to decently predict global graupel distribution, especially in tropical and midlatitude regions. The addition of.graupel in the cloud microphysics increases the precipitation simulation in North China, while that in Southwest China is weakened and dispersed. Moreover, graupel scheme increases the precipitation simulations of.almost all *** increase in light rain is obvious, and the absolute value of.heavy rain is strengthened. This may be because graupel quickly melts into rain af.er f.lling out of.the zero-temperature layer due to its large mass and f.st f.lling speed, increasing surf.ce precipitation. In summary, the addition of.graupel in the cloud microphysical scheme can improve Cma-Gf.’s underestimation of.strong precipitation.

关键词： graupel cloud microphysical scheme precipitation China Meteorological Administration-Global f.recast System(Cma-Gf.) climate zone

Potential role of.hippocampal neurogenesis in spinal cord injury induced post-trauma depression

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Neural Regeneration Research 2024年第10期19卷 2144-2156页

作者： Ying ma Yue Qiao Xiang Gao Spinal Cord and Brain Injury Research Group Stark Neuroscience Research InstituteIndianapolisINUSA Department of.Neurological Surgery Indiana University School of MedicineIndianapolisINUSA Department of.Neurology Shengjing Hospital of China Medical UniversityShenyangLiaoning ProvinceChina

It has been reported both in clinic and rodent models that beyond spinal cord injury directly induced symptoms, such as paralysis, neuropathic pain, bladder/bowel dysf.nction, and loss of.sexual f.nction, there are a variety of.secondary complications, including memory loss, cognitive decline, depression, and Alzheimer's disease. The largescale longitudinal population-based studies indicate that post-trauma depression is highly prevalent in spinal cord injury patients. Yet, f.w basic studies have been conducted to address the potential molecular mechanisms. One of.possible f.ctors underlying the depression is the reduction of.adult hippocampal neurogenesis which may come f.om less physical activity, social isolation, chronic pain, and elevated neuroinf.ammation af.er spinal cord injury. However, there is no clear consensus yet. In this review, we will f.rst summarize the alteration of.hippocampal neurogenesis post-spinal cord injury. Then, we will discuss possible mechanisms underlie this important spinal cord injury consequence. f.nally, we will outline the potential therapeutic options aimed at enhancing hippocampal neurogenesis to ameliorate depression.

关键词： antidepressants chronic pain depression exercise hippocampal neurogenesis inf.ammation inhibition neuroinf.ammation physical activity def.cits social isolation spinal cord injury

Damage constitutive model of.lunar soil simulant geopolymer under impact loading

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Journal of.Rock Mechanics and Geotechnical Engineering 2024年第3期16卷 1059-1071页

作者： Hanyan Wang Qinyong ma Qianyun Wu School of.Civil Engineering and Architecture Anhui University of Science and TechnologyHuainan232001China Engineering Research Center of.Underground Mine Construction Ministry of EducationAnhui University of Science and TechnologyHuainan232001China

Lunar base construction is a crucial component of.the lunar exploration program,and considering the dynamic characteristics of.lunar soil is important f.r moon ***,investigating the dynamic properties of.lunar soil by establishing a constitutive relationship is critical f.r providing a theoretical basis f.r its damage *** this paper,a split Hopkinson pressure bar(SHPB)device was used to perf.rm three sets of.impact tests under dif.erent pressures on a lunar soil simulant geopolymer(LSSG)with sodium silicate(Na_(2)SiO_(3))contents of.1%,3%,5%and 7%.The dynamic stressestrain curves,f.ilure modes,and energy variation rules of.LSSG under dif.erent pressures were *** equation was modif.ed based on the ZWT viscoelastic constitutive model and was combined with the damage *** damage element obeys the Weibull distribution and the constitutive equation that can describe the mechanical properties of.LSSG under dynamic loading was *** results demonstrate that the dynamic compressive strength of.LSSG has a marked strain-rate strengthening ***_(2)SiO_(3) has both strengthening and deterioration ef.ects on the dynamic compressive strength of.*** Na_(2)SiO_(3) grows,the dynamic compressive strength of.LSSG f.rst increases and then *** a f.xed air pressure,5%Na_(2)SiO_(3) had the largest dynamic compressive strength,the largest incident energy,the smallest absorbed energy,and the lightest *** ZWT equation was modif.ed according to the stress response properties of.LSSG and the range of.the SHPB strain rate to obtain the constitutive equation of.the LSSG,and the model’s correctness was conf.rmed.

关键词： Lunar soil simulant geopolymer(LSSG) Split hopkinson pressure bar(SHPB)test Constitutive model Energy analysis f.ilure mode

Self.attention Guidance Based Crowd Localization and Counting

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machine Intelligence Research 2024年第5期21卷 966-982页

作者： Zhouzhou ma Guanghua Gu Wenrui Zhao School of.Inf.rmation Science and Engineering Yanshan UniversityQinhuangdao066000China Hebei Key Laboratory of.Inf.rmation Transmission and Signal Processing Qinhuangdao066000China

Most existing studies on crowd analysis are limited to the level of.counting,which cannot provide the exact location of.*** paper proposes a self.attention guidance based crowd localization and counting network(SA-CLCN),which can simultaneously locate and count *** take the f.rm of.object detection,using the original point annotations of.crowd datasets as supervision to train the ***,the center point coordinate of.each head as well as the number of.crowds are ***,to cope with the spatial and positional variations of.the crowd,the proposed method introduces transf.rmer to construct a globallocal f.ature extractor(GLf.)together with the convolutional *** establishes the near-to-f.r dependency between elements so that the global context and local detail f.atures of.the crowd image can be extracted ***,this paper designs a pyramid f.ature f.sion module(Pf.M)to f.se the global and local inf.rmation f.om high level to low level to obtain a multiscale f.ature *** downstream tasks,this paper predicts candidate point of.sets and conf.dence scores by a simple regression header and classif.cation *** addition,the Hungarian algorithm is used to match the predicted point set and the labelled point set to f.cilitate the calculation of.*** proposed network avoids the errors or higher costs associated with using traditional density maps or bounding box ***,we have conducted extensive experiments on several crowd datasets,and the proposed method has produced competitive results in both counting and localization.

关键词： Crowd localization crowd counting transf.rmer point supervision object detection

Genetic characteristics of.H1N1 inf.uenza virus outbreak in China in early 2023

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Virologica Sinica 2024年第3期39卷 520-523页

作者： Xuanxuan Li Zef.ng Dong Jiaming Li Chuanran Dou Deyu tian Zhenghai ma Wenjun Liu George f.Gao Yuhai Bi College of.Lif. Science and Technology Xinjiang UniversityUrumchi830046China CAS Key Laboratory of.Pathogen Microbiology and Immunology Institute of MicrobiologyCenter for Influenza Research and Early-warning(CASCIRE)CAS-TWAS Center of Excellence for Emerging Infectious Diseases(CEEID)Chinese Academy of SciencesBeijing100101China Suzhou Center f.r Disease Control and Prevention Suzhou215004China Laf.yette College EastonPA 18042USA University of.Chinese Academy of.Sciences Beijing100049China D.H.Chen School of.Universal Health Zhejiang UniversityHangzhou 310058China

Dear Editor,Inf.uenza A virus(IAV)exhibits rapid mutability and antigenic *** the 20th century,IAV has caused at least f.ur pandemics(Yang et al.,2022).Presently,seasonal H_(3)N_(2)and H1N1 are the prevailing human-adaptive IAV subvariants responsible f.r human *** implementation of.public health interventions since the commencement of.the COVID-19 pandemic has ef.ectively curtailed global inf.uenza circulation(Olsen et al.,2021).f.llowing the downregulation of.the prevention and control strategies against COVID-19,global inf.uenza activity is showing a recovery.

关键词： inf.uenza prevention H1N1