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Characteristics of extratropical cyclone variability in the Northern Hemisphere and their response to rapid changes in Arctic sea ice

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Acta Oceanologica Sinica 2023年第10期42卷 10-22页

作者： di chen Qizhen Sun Ocean University of China Qingdao 266100China National Marine Environmental Forecasting Center Beijing 100081China

Extratropical cyclones are critical weather systems that affect large-scale weather and climate changes at mid-high ***,prior research shows that there are still great difficulties in predicting extratropical cyclones for occurrence,frequency,and *** this study,mean sea level pressure(MSLP)data from the European Centre for Medium-Range Weather Forecasts(ECMWF)reanalysis(ERA5)are used to calculate the variance statistics of the MSLP to reveal extratropical cyclone activity(ECA).Based on the analysis of the change characteristics of ECA in the Northern Hemisphere,the intrinsic link between ECA in the Northern Hemisphere and Arctic sea ice is *** results show that the maximum ECA mainly occurs in winter over the mid-high latitudes in the Northern *** maximum ECA changes in the North Pacific and the North Atlantic,which are the largest variations in the Northern Hemisphere,are independent of each other,and their mechanisms may be ***,MSLP is a significant physical variable that affects *** North Atlantic Oscillation(NAO)and North Pacific Index(NPI)are significant indices that impact ECA in the North Atlantic and North Pacific,*** innovation of this paper is to explore the relationship between the activity of extratropical cyclones in the Northern Hemisphere and the abnormal changes in Arctic sea ice for the first *** mechanism is that the abnormal changes in summer-autumn and winter Arctic sea ice lead to the phase transition of the NPI and NAO,respectively,and then cause the occurrence of ECA in the North Pacific and North Atlantic,*** sea ice plays a crucial role in the ECA in the Northern Hemisphere by influencing the polar vortex and westerly *** is the first exploration of ECAs in the Northern Hemisphere using Arctic sea ice,which can provide some references for the in-depth study and prediction of ECAs in the Northern Hemisphere.

关键词： extratropical cyclones mean sea level pressure North Atlantic Oscillation(NAO) North Pacific Index(NPI) Arctic sea ice

A water-stable organolead iodide material for overall photocatalytic CO_(2) reduction

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Nano Research 2022年第12期15卷 10084-10089页

作者： rong chen Guodong Gao Jingshan Luo Institute of Photoelectronic Thin Film Devices and Technology Solar Energy Research CenterKey Laboratory of Photoelectronic Thin Film Devices and Technology of TianjinMinistry of Education Engineering Research Center of Thin Film Photoelectronic TechnologyRenewable Energy Conversion and Storage CenterNankai UniversityTianjin300350China

The utilization of perovskites as photocatalysts to convert CO_(2) into fuels and chemicals has received wide attention ***,their instability in water hinders their long-term application for overall photocatalytic CO_(2) ***,we integrate the water-stable perovskite-like organolead iodide crystalline material[Pb8I8(H2O)3]8+[-O2C(CH2)4CO_(2)-]4(TJU-16)with Au co-catalyst for photocatalytic CO_(2) reduction in aqueous solution without sacrificial *** the AM 1.5 G simulated illumination,the TJU-16 with 0.19 wt.‰ Au co-catalyst steadily generated electrons for CO_(2) reduction reaction,which was 2.2 times of pure *** Au0.19/TJU-16 catalyzed CO_(2) reduction at a rate of 84.2μmol·g-1·h-1,and achieved a solar-to-fuel(STF)conversion efficiency of 0.034%.Our work will motivate the rational design of water-stable perovskite-like materials for photocatalytic applications.

关键词： water-stable organolead iodide photocatalytic CO_(2)conversion

Study on the performance of ceramic composite projectile penetrating into ceramic composite target

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Defence Technology（防务技术） 2017年第4期13卷 295-299页

作者： rong-cheng Yi Li-kui Yin Jian-ru Wang Zhi-gang chen di-qi Hu National Defense Key Laboratory of Underground Damage Technology North University of China Taiyuan 030051 China

In order to study the performance of ceramic composite projectile penetrating into ceramic composite target,the contrast test and numerical simulations of the penetration of standard projectile and the ceramic composite projectile into a ceramic composite target were *** results show that the penetration performance of ceramic composite projectile is obvious superior to that of standard projectile for ceramic composite *** ceramic nose of ceramic composite projectile fully destroys the ceramic panels anterior to its following armor-piercing projectile body,thus maintaining the penetration ability of the following armor-piercing projectile body.

关键词： Ceramic Composite projectile Penetration Composite target Test

SIMULATIONS OF FLOWFIELDS AROUND UNDERWATER APPENDED BOdiES

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Journal of Hydrodynamics 2003年第4期15卷 17-23页

作者： HuangZhen-yu chengHong-rong ZhouLian-di MiaoGuo-ping SchoolofNavalArchitectareandOceanEngineering ShanghaiJiaotongUniversityShanghai200030 ChinaShipScientificResearchCenter Wuxi214082China SchoolofNavalArchitectareandOceanEngineering ShanghaiJiaotongUniversityShanghai200030China

The numerical method which is based on flux difference splitting, LUdecomposition, and implicit high-resolution third-order Essentially Non-Oscillatory (ENO) scheme wasconstructed for the efficient computation of steady state solution to three-dimensionalincompressible Navier-Stokes e-quations in general coordinates. The flowfields over underwateraxisymmetric bodies, full-appended axisymmetric bodies and axisymetric bodies with a ring-wing ductwere simulated. The method is proved to be capable of predicting the circumferential-mean velocitydistribution at model scale to the accuracy of around 3% of measured values, and of predicting somedetails of flow features, for example, the wake harmonics.

关键词： essentially non-oscillatory ( ENO ) schemes flux splitting LUdecomposition computational fluid dynamics (CFD)

Achievements, challenges and prospects for the development of broadly protective multivalent vaccines and therapeutic antibodies against hand, foot and mouth disease

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Science Bulletin 2015年第15期60卷 1305-1315页

作者： Ke Lyu rong chen Key Laboratory of Molecular Virology and Immunology Institut Pasteur of Shanghai Chinese Academy of Sciences

Hand, foot and mouth disease(HFMD) is a significant health concern in the Asia–Pacific regions for infants and young children in recent years. However, no vaccines or therapeutics are available at present. The causative agents for HFMD include human enterovirus 71(EV71), coxsackievirus A16(CVA16) and some other viruses. Recently, tremendous progress has been made in the development of monovalent and bivalent vaccines against HFMD. A few neutralizing monoclonal antibodies against EV71 or CVA16 have been identified and characterized. Here, we reviewed some achievements for the development of broadly protective vaccines and neutralizing antibodies against HFMD, and discussed challenges and prospects toward broadly protective multivalent vaccines and therapeutic antibodies against HFMD.

关键词： Hand foot and mouth disease (HFMD) Human enterovirus 71 (EV71) Coxsackievirus A 16(CVAI6) - Vaccine Neutralizing antibodies

Biodegradable films of chitosan and tea polyphenols catalyzed by laccase and their physical and antioxidant activities

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Food Bioscience 2022年第2期46卷 158-163页

作者： Tong chen Yufei Shen di Wu rong Wu Jie Sheng Xiao Feng Xiaozhi Tang College of Food Science and Engineering Collaborative Innovation Center for Modern Grain Circulation and SafetyKey Laboratory of Grains and Oils Quality Control and ProcessingNanjing University of Finance and EconomicsNanjing210023China Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry University of Science and Technology of China96 Jinzhai RoadHefeiAnhui230026China

The effects of laccase crosslinking chitosan(CS)and tea polyphenols(TP)on the structure,physical and antioxidant properties of CS-based biodegradable films were investigated in this *** crosslinking significantly increased the particle size and zeta-potential of CS+TP particles.A simple blending of CS and TP decreased the elongation at break significantly,while the elongation at break of biodegradable films significantly increased after laccase ***,TP addition increased the tensile strength(TS)of CS based films,while laccase crosslinking promoted the increase,making it more suitable for *** addition of TP significantly changed the CS-based films from white and transparent to light *** spectra showed that no C=N bond was observed in CS+TP particles,which could result from the inhibition of Schiff base reaction due to the big steric hindrance of *** shift of amide I peak to lower wavelength in laccase catalyzed films indicated the conversion of some primary amines into secondary amines caused by Michael addition *** was proposed that laccase oxidized polyphenol to o-quinones,which reacted with nucleophilic groups of chitosan,leading to the increase of secondary ***,the antioxidant capacity of CS+TP films crosslinked by laccase increased significantly compared with CS and CS+TP blended *** summary,laccase catalysis could be applied to manufacture biodegradable films with improved mechanical property and antioxidant activity.

关键词： Laccase crosslinking Physical properties FTIR Antioxidant properties 13C NMR

The Long-Sought-After Plant Heterochromatin Protein 1

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Molecular Plant 2019年第1期12卷 14-15页

作者： rong chen Molecular Plant

Heterochromatin,being transcriptionally inactive,is the highly condensed form of chromatin that is associated with Histone H3 lysine 9 methylation (H3K9me)and DNA methylation in eukaryotic *** fission yeast and animal... 详细信息

关键词： Heterochromatin H3K9me animals

Hydrophobic interaction membrane chromatography for bioseparation and responsive polymer ligands involved

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Frontiers of Materials Science 2017年第3期11卷 197-214页

作者： Jingling chen rong PENG Xiaonong chen Beijing Laboratory of Biomedical Materials College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China

Hydrophobic interaction chromatography （HIC） is a rapid growing bioseparation technique, which separates biomolecules, such as therapeutic proteins and antibodys, based on the reversible hydrophobic interaction between immobilized hydrophobic ligands on chromatographic resin spheres and non-polar regions of solute molecule. In this review, the fundamental concepts of HIC and the factors that may affect purification efficiency of HIC is summarized, followed by the comparison of HIC with affinity chromatography and ion-exchange chromatography. Hydrophobic interaction membrane chromatography （HIMC） combines the advantages of HIC and membrane process and has showed great potential in bioseparation. For better understanding of HIMC, this review presents an overview of two main concerns about HIMC, i.e. membrane materials and hydrophobic ligands. Specifically, cellulose fiber-based membrane substrate and environment-responsive ligands are emphasized.

关键词： hydrophobic interaction membrane chromatography bioseparation membrane environmental response ligand

Numerical Approximation of Stochastic Theta Method for Random Periodic Solution of Stochastic differential Equations

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Acta Mathematicae Applicatae Sinica 2020年第3期36卷 689-701页

作者： rong WEI Chuan-zhong chen School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China School of Science Hainan UniversityHaikou 570228China

In this paper,we make use of stochastic theta method to study the existence of the numerical approximation of random periodic *** prove that the error between the exact random periodic solution and the approximated on... 详细信息

关键词： Stochastic theta method random periodic solution numerical approximation