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Boosting the electrochemical performance of LiNi_(0.6)Mn_(0.2)Co_(0.2)O_2 through a trace amount of Mg-B co-doping

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Journal of Materials Science & Technology 2021年第30期89卷 167-178页

作者： Ning Zhang Ying Li Yifan qiao School of Metallurgy Northeastern UniversityShenyang 110819China Liaoning Key Laboratory for Metallurgical Sensor and Technology Northeastern UniversityShenyang 110819China

The extended cycle life of cells is often sacrificed at the expense of high specific energy for high-nickel *** doping is a promising method to build high-nickel cathode with high energy density and long cycle ***,a trace amount of Mg-B co-doping in LiNi_(0.6)Mn_(0.2)Co_(0.2)O_2(NMC622)is investiga.ed in this work,which shows improved structural and electrochemical stability of 1%Mg-0.5%B co-doped material at both 30 and 55℃in *** chemical composition,structural,and surface analysis are carried out in this *** was found that all the selected materials have a similar composition to the ***,Mg and B doping have different effects on the crystal structural change of NMC622,to be more specific,the c-lattice parameter increases with Mg doping,while the Li^(+)/Ni^(2+)mixing content increases when B was incorporated into the ***,the microstructure of primary particles was changed by B doping significantly as confirmed by the SEM *** were marginal benefits in terms of structural and electrochemical stability of materials introduced by Mg or B sole *** comparison,incorporating a suitable amount of both Mg and B into NMC622,we found the capacity retention of cells was noticeably improved by reducing the impedance growth and preventing cation mixing during *** study demonstrates the importance of co-incorporation of Mg,B,and optimizing the co-dopant content to stabilize NMC622 as cathode for lithium-ion batteries.

关键词： High-nickel cathode Mg doping B doping Mg-B co-doping Electrochemical performance Lithium-Ion batteries

Mean estimation over numeric data with personalized local differential privacy

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Frontiers of Computer Science 2022年第3期16卷 183-192页

作者： qiao XUE Youwen ZHU Jian WANG College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China School of Cyber Security Gansu University of Political Science and LawLanzhou 730070China

The fast development of the Internet and mobile devices results in a crowdsensing business model,where individuals(users)are willing to contribute their data to help the institution(data collector)analyze and release useful ***,the reveal of personal data will bring huge privacy threats to users,which will impede the wide application of the crowdsensing *** settle the problem,the definition of local differential privacy(LDP)is ***,to respond to the varied privacy preference of users,resear-chers propose a new model,i.e.,personalized local differential privacy(PLDP),which allow users to specify their own privacy *** this paper,we focus on a basic task of calculating the mean value over a single numeric attribute with *** on the previous schemes for mean estimation under LDP,we employ PLDP model to design novel schemes(LAP,DCP,PWP)to provide personalized privacy for each *** then theoretically analysis the worst-case variance of three proposed schemes and conduct experiments on synthetic and real datasets to evaluate the performance of three *** theoretical and experimental results show the optimality of PWP in the low privacy regime and a slight advantage of DCP in the high privacy regime.

关键词： personalized local differential privacy mean estimation crowdsensing model

A silylene-stabilized distannavinylidene with a highly labile substituent

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Science China Chemistry 2023年第12期66卷 3555-3561页

作者： Zihao qiao Ming Chen Zhenbo Mo State Key Laboratory and Institute of Elemento-Orga.ic Chemistry Frontiers Science Center for New Organic MatterCollege of ChemistryNankai UniversityTianjin 300071China

Vinylidene and its heavier analogues are fundamentally important in synthetic chemistry,but their stabilization and structural characterization remains extremely *** we describe that the reduction of an NHSi-stabilized stannyl-stannylene(2)with one molar equivalent of[(^(Mes)Nacnac)Mg]_(2)affords an NHSi-stabilized distannavinylidene(3).Single-crystal X-ray crystallography and density functional theory(DFT)calculations show that compound 3 features a pronounced Sn=Sn double bond and one lone pair of electrons at the two-coordinate Sn *** strikingly,3 undergoes an interconversion with distannyne(4)upon the addition and removal of one molar equivalent of N-heterocyclic *** 3 readily reacts with Ph_(2)C=C=O,Ad C≡P and(Al Cp^(*))_(4)to give the structurally interesting stannacycles(5,6)and an aluminyl distannyne(7),demonstrating its unique reactivity derived from the high substituent lability.

关键词： distannavinylidene silylenes stannacycles distannyne carboranes

Modeling and analysis of an inextensible beam with inertial and geometric nonlinearities

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Applied Mathematics and Mechanics(English Edition) 2024年第12期45卷 2113-2130页

作者： Zhanhuan YAO Tieding GUO Wanzhi qiao College of Civil and Architecture Engineering Guangxi University School of Aerospace Engineering and Applied Mechanics Tongji University School of Civil and Environment Engineering Harbin Institute of TechnologyShenzhen

The present study focuses on an inextensible beam and its relevant inertia nonlinearity, which are essentially distinct from the commonly treated extensible beam that is dominated by the geometric nonlinearity. Explicitly, by considering a weakly constrained or free end(in the longitudinal direction), the inextensibility assumption and inertial nonlinearity(with and without an initial curvature) are introduced. For a straight beam, a multi-scale analysis of hardening/softening dynamics reveals the effects of the end stiffness/mass. Extending the straight scenario, a refined inextensible curved beam model is further proposed, accounting for both its inertial nonlinearity and geometric nonlinearity induced by the initial curvature. The numerical results for the frequency responses are also presented to illustrate the dynamic effects of the initial curvature and axial constraint, i.e., the end mass and end stiffness.

关键词： 70K30 geometric non-linearity hardening/softening dynamics inertia nonlinearity inextensible beam initial curvature O322

Theoretical insights into influence of additives on sulfamethoxazole crystal growth kinetics and mechanisms

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Frontiers of Chemical Science and Engineering 2023年第10期17卷 1503-1515页

作者： qiao Chen Mingdong Zhang Yuanhui Ji Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research School of Chemistry and Chemical EngineeringSoutheast UniversityNanjing 211189China

In this work,the influence of the initial chemical potential gradient,stirring speed,and polymer type on sulfamethoxazole(SMX)crystal growth kinetics was systematically investiga.ed through density functional theory(DFT)calculations,experimental measurements and the two-step chemical potential gradient *** investiga.e the influence of different conditions on the thermodynamic driving force of SMX crystal growth,SMX solubilities in different polymer solutions were *** model polymers effectively improved SMX *** was further found that polyvinylpyrrolidone(PVP)and hydroxypropyl methyl cellulose(HPMC)played a crucial role in inhibiting SMX crystal ***,polyethylene glycol(PEG)promoted SMX crystal *** effect of the polymer on the crystal growth mechanisms of SMX was further analyzed by the two-step chemical potential gradient *** the system containing PEG 6000,crystal growth is dominated by the surface ***,in the system containing PEG 20000,crystal growth is dominated by both the surface reaction and *** addition,DFT calculations results showed that HPMC and PVP could form strong and stable binding energies with SMX,indicating that PVP and HPMC had the potential ability to inhibit SMX crystal growth.

关键词： insoluble drugs polymer inhibition crystallization crystal growth kinetics DFT calculations

Regulating FUS Liquid-Liquid Phase Separation via Specific Metal Recognition

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Chinese Journal of Polymer Science 2022年第9期40卷 1043-1049页

作者： Fen Li Yiyang Lin Yan qiao Beijing National Laboratory for Molecular Sciences(BNLMS) Laboratory of Polymer Physics and ChemistryCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Chemical Resource Engineering Beijing Laboratory of Biomedical MaterialsBeijing University of Chemical TechnologyBeijing 100029China

Liquid-liquid phase separation(LLPS)or biomolecular condensation that leads to formation of membraneless orga.elles plays a critical role in many biochemical *** study of regulating LLPS is therefore central to the understanding of protein aggrega.ion and disease-relevant *** report a fused in sarcoma protein(FUS)-derived low complexity(LC)sequence that undergoes LLPS in the presence of metal *** LC protein was constructed by fusing a hexhistidine-tag to the N-terminal low complexity domain(the residues 1–165 in QGSY-rich segment)of *** condensation of the intrinsic disordered protein into coacervate droplets was observed in the presence of metal ions that chelate oligohistidine moieties to form protein *** demonstrate the key role of metal ion-histidine coordination in governing LLPS behaviours and the fluidity of biomolecular *** taking advantage of competitive binding using chelators,we show the possibility of regulating dynamic behaviors of disease-relevant protein droplets,and developing a potential approach towards controllable biological encapsulation/release.

关键词： FUS Liquid-liquid phase separation Biomolecular condensate Membraneless orga.elles Protocells Metal coordination

All-optically integrated photoacoustic and optical coherence tomography:A review

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Journal of Innovative Optical Health Sciences 2017年第4期10卷 42-51页

作者： Wei qiao Zhongjiang Chen Ministry of Education Key Laboratory of Laser Life Science and Institute of Laser Life Science College of Biophotonics South China Normal University Guangzhou 510631 China

All-optically integrated photoacoustic(PA)and optical coherence tomography(OCT)dualmode imaging technology that could o®er comprehensive pathological information for accurate diagnosis in clinic has gradually become a promising imaging technology in the aspect of biomedical imaging during the recent *** review refers to the technology aspects of alloptical PA detection and system evolution of optically integrated PA and OCT,including Michelson interferometer dual-mode imaging system,Fabry–Perot(FP)interferometer dualmode imaging system and Mach–Zehnder interferometer dual-mode imaging *** is believed that the optically integrated PA and OCT has great potential applications in biomedical imaging.

关键词： All-optical photoacoustic optical coherence tomography dual-mode imaging

Picard Type Theorems Concerning Certain Small Functions

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Acta Mathematica Sinica,English Series 2017年第9期33卷 1275-1286页

作者： Pai YANG Lei qiao College of Applied Mathematics Chengdu University of Information Technology School of of Mathematics and Information Science He'nan University of Economics and Law

Let f（z） be a meromorphic function in the complex plane, whose zeros have multiplicity at least k ＋ 1 （k 〉 2）. If sin z is a small function with respect to f（z）, then f（k）（z） - P（z） sin z has infinitely many zeros in the complex plane, where P（z） is a nonzero polynomial of deg（P（z）） ≠ 1. Keywords Meromorphic function, Nevanlinna theory, Picard type theorem.

关键词： Meromorphic function Nevanlinna theory Picard type theorem

Advances and Overview of the Study on Paleo-earthquake Events: A Review of Seismites

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Acta Geologica Sinica(English Edition) 2015年第5期89卷 1702-1706,I0009,I0010,1707-1746页

作者： HE Bizhu qiao Xiufu State Key Laboratory of Continental Tectonics and Dynamics Institute of GeologyChinese Academy of Geological Sciences

The distribution and formation mechanisms of typical identified seismites are analyzed based on various factors from plate tectonic positions, types of sedimentary basins and properties of seismogenic faults to focal ***, structural styles, reserved positions, activity times, formation mechanisms and dynamics of soft-sediment deformation structures triggered by seismic activity are systematically *** to the genetic types of seismites, we propose 5 categories, including liquefied deformation, thixotropic deformation, hydroplastic deformation, superimposed gravity driving deformation and brittle ***, based on the main genetic types, composition of sediments and deformation styles, we draw up 35 secondary *** determine paleo-seismic sequences in different times, activities of seismogenic faults, high-resolution tectonic events in one main tectonic movement and paleo-tectonic settings, and to understand the inducing mechanisms of paleo-earthquakes and ecologic environment evolution, researching on seismites are of great *** multiple approaches to identify the paleoearthquake records, simulating experiments on various soft-sediment deformation structures triggered by different magnitudes of shocking, dating precisely on paleo-seismic events, impacting on paleogeography and biological environment and on energy and resources domain are the frontiers of paleoseismic research.

关键词： soft-sediment deformation structure formation mechanism seismites classification paleo-seismicity history and frontier