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Science China Chemistry 2005年第3期48卷 177-182页

作者： ZHANG Hui wang zhenhui ZHOU Shuping College of Chemistry and Environmental Science Key Laboratory of Environmental Science and EngineeringEducation Commission of Henan ProvinceHenan Normal UniversityXinxiang 453002China

Based on the molecular recognition ability of conductive polymer and the peculiar properties of carbon nanotubes,a novel single wall nanotubes(SWNTs)compound poly(4-aminopyridine)modified electrode(SWNTs/POAPE)is prepared at glass carbon electrode(GCE).The electrochemistry response of nitrophenol isomers is studied at the SWNTs/*** re-sult indicates that o-,m-and p-nitrophenol are separated entirely at the SWNTs/POAPE *** electrode present here can be easily used to determine nitrophenol isomers simultaneously with higher sensitivity.

关键词： carbon nanotube compound poly(4-aminopyridine) modified electrode nitrophenol isomer voltammetry.

Proteomic analysis provides insights into the function of Polian vesicles in the sea cucumber A postichopus japonicus post-evisceration

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Journal of Oceanology and Limnology 2022年第5期40卷 2028-2041页

作者： Jinlin JI zhenhui wang Wei ZHU Qiang LI Yinan wang College of Marine and Biology Engineering Yancheng Institute of TechnologyYancheng 224051China Dalian Ocean University Dalian 116023China

The Polian vesicle is the main accessory structure in the water vascular system of sea *** can function to hold water vascular fluid under slight pressure and act as a hematopoiesis,excretory,and inflammatory response *** the only organ to remain after evisceration,the Polian vesicle may function in the survival and regeneration of sea *** performed Tandem Mass Tag(TMT)-based proteomics to identify how proteins in the Polian vesicle of Apostichopus japonicus respond to *** the 8453 proteins identified from vesicle samples before evisceration(PVOh)and at 6-h post-evisceration(PV6h)and 3-d post-evisceration(PV3d),we detected 222 differentially abundant proteins(DAPs).Most of the annotated DAPs were associated with cell growth and proliferation,immune response and wound healing,substance transport and metabolism,cytoskeleton/cilia/flagella,extracellular matrix,energy production and conversion,protein synthesis and modification,and signal recognition and *** with PVOh,fewer DAPs were identified at PV6h,and more DAPs were found at PV3d,and these DAPs were widely distributed among multiple biological *** results indicate that a wide range of biological processes was induced in Polian vesicles in response to *** particular,Polian vesicles may play important roles in the re storation of coelomocyte s,immune defense,and wound healing in sea *** propose that the Polian vesicle may be involved in visceral regeneration through nutrition and energy supply and by promoting dedifferentiation and ***,these results provided new insights into the function of the Polian vesicle in *** post-evisceration.

关键词： sea cucumber Polian vesicle evisceration proteomics differentially abundant protein

Statistical Modeling with a Hidden Markov Tree and High-resolution Interpolation for Spaceborne Radar Reflectivity in the Wavelet Domain

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Advances in Atmospheric Sciences 2020年第12期37卷 1359-1374页

作者： Leilei KOU Yinfeng JIANG Aijun CHEN zhenhui wang Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science&TechnologyNanjing 210044China Nanjing University of Information Science&Technology Nanjing 210044China

With the increasing availability of precipitation radar data from space,enhancement of the resolution of spaceborne precipitation observations is important,particularly for hazard prediction and climate modeling at local scales relevant to extreme precipitation intensities and *** this paper,the statistical characteristics of radar precipitation reflectivity data are studied and modeled using a hidden Markov tree(HMT)in the wavelet ***,a high-resolution interpolation algorithm is proposed for spaceborne radar reflectivity using the HMT model as prior *** to the small and transient storm elements embedded in the larger and slowly varying elements,the radar precipitation data exhibit distinct multiscale statistical properties,including a non-Gaussian structure and scale-to-scale *** HMT model can capture well the statistical properties of radar precipitation,where the wavelet coefficients in each sub-band are characterized as a Gaussian mixture model(GMM),and the wavelet coefficients from the coarse scale to fine scale are described using a multiscale Markov *** state probabilities of the GMM are determined using the expectation maximization method,and other parameters,for instance,the variance decay parameters in the HMT model are learned and estimated from high-resolution ground radar reflectivity *** the prior model,the wavelet coefficients at finer scales are estimated using local Wiener *** interpolation algorithm is validated using data from the precipitation radar onboard the Tropical Rainfall Measurement Mission satellite,and the reconstructed results are found to be able to enhance the spatial resolution while optimally reproducing the local extremes and gradients.

关键词： spaceborne precipitation radar hidden Markov tree model Gaussian mixture model interpolation in the wavelet domain multiscale statistical properties

Water Vapor Motion Signal Extraction from FY-2E Longwave Infrared Window Images for Cloud-free Regions:The Temporal Difference Technique

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Advances in Atmospheric Sciences 2014年第6期31卷 1386-1394页

作者： YANG Lu wang zhenhui CHU Yanli ZHAO Hang TANG Min Beijing Meteorological Office (Da Xing) Collaborative Innovation Center on the Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology School of Atmospheric Physics Nanjing University of Information Science & Technology Institute of Urban Meteorology China Meteorological Administration

The aim of this study is to calculate the low-level atmospheric motion vectors （AMVs） in clear areas with FY-2E IR2 window （11.59-12.79 μm） channel imagery,where the traditional cloud motion wind technique fails.A new tracer selection procedure,which we call the temporal difference technique,is demonstrated in this *** technique makes it possible to infer low-level wind by tracking features in the moisture pattern that appear as brightness temperature （TB） differences between consecutive sequences of 30-min-interval FY-2E IR2 images over cloud-free *** TB difference corresponding to a 10％ change in water vapor density is computed with the Moderate Resolution Atmospheric Transmission （MODTRAN4） radiative transfer *** total contribution from each of the 10 layers is analyzed under four typical atmospheric conditions：tropical,midlatitude summer,***,and midlatitude *** peak level of the water vapor weighting function for the four typical atmospheres is assigned as a specific height to the TB ＂wind＂.This technique is valid over cloudfree ocean *** proposed algorithm exhibits encouraging statistical results in terms of vector difference （VD）,speed bias （BIAS）,mean vector difference （MVD）,standard deviation （SD）,and root-mean-square error （RMSE）,when compared with the wind field of NCEP reanalysis data and rawinsonde observations.

关键词： atmospheric motion vector clear sky radiative transfer temporal difference technique

Dual precipitate simultaneous enhancement of tensile and fatigue strength in(FeCoNi)_(86)Al_(7)Ti_(7) high-entropy alloy fabricated using selective laser melting

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Journal of Materials Science & Technology 2023年第17期148卷 90-104页

作者： Long Xu Yandong Jia zhenhui wang Shiwei Wu Yuefei Jia Chuan Geng Jianchao Peng Xiaohua Tan Gang wang Institute of Materials Shanghai UniversityShanghai 200444China Zhejiang Institute of Advanced Materials Shanghai UniversityJiashan 314100China Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1Singapore 117575Singapore Laboratory for Microstructures Shanghai UniversityShanghai 200444China

Recent studies have indicated that precipitation-strengthened high-entropy alloys(HEAs)show superior mechanical performance and have been successfully fabricated by additive ***,the lack of fatigue and fracture research has limited the engineering applications of additive manufacturing *** work explored a dual precipitation-strengthened(FeCoNi)_(86)Al_(7)Ti_(7) HEA with excellent tensile and fatigue strength,prepared through selective laser melting and heat *** with the as-built samples,the tensile properties and fatigue endurance limit improved through aging by 48.7%and 30%,*** strengthening mechanism and enhanced fatigue performance were clarified in *** improvement in fatigue strength was attributed to the improved resistance of the L1_(2) and L2_(1) *** deformation,the dislocation shear coherent L1_(2) precipitates reduced slip band energy and inhibited slip band expansion,while the L2_(1) particles acted as obstructions for further slip band propagation,severely limiting the rapid formation and propagation of crack ***-situ TEM cyclic tensile-tensile testing also clarified the fatigue crack growth behavior,demonstrating that crack deflection due to L2_(1) precipitate obstruction slowed down the crack growth rate and efficiently promoted the closure of the microcrack *** work offers im plications for a new strategy to develop additive manufacturing HEAs.

关键词： High-entropy alloy Selective laser melting Precipitation strengthening Fatigue Crack deflection

Acidic electroreduction CO_(2)to formic acid via interfacial modification of Bi nanoparticles at industrial-level current

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Nano Research 2024年第7期17卷 5817-5825页

作者： Tian Dong Hongdong Li zhenhui wang Yanling Geng Rui Chang Xiaofeng Tian Jianping Lai Shouhua Feng Lei wang Key Laboratory of Eco-Chemical Engineering International Science and Technology Cooperation Base of Eco-Chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

Electrocatalytic CO_(2)reduction reaction(CO_(2)RR)in acidic media is a promising approach to overcome the unavoidable formation of carbonates in alkaline or neutral ***,the proton-rich environment near the catalyst surface favors hydrogen evolution reactions(HER),leading to lower energy efficiency of the desired products,especially in industrial-level current ***,quaternary ammonium cationic surfactant(cetyltrimethylammonium bromide(CTAB))was introduced into acidic electrolyte to modulate the interfacial microenvironment,which greatly enhanced CO_(2)electroreduction to formic acid(HCOOH)at the Bi/C nanoparticles *** a Bi/C nanoparticles electrode with CTAB added,constant production of formic acid was enabled with a cathodic energy efficiency of>40%and maximum FE_(HCOOH)(FE=Faradaic efficiency)of 86.2%at−400 mA·cm^(−2)over 24 *** with in-situ attenuated total reflection Fourier transform infrared spectroscopy,the concentration of*OCHO intermediates significantly increased after CTAB modification,confirming that the hydrophobic interface microenvironment formed by dynamic adsorption of positively charged long alkyl chains on Bi/C nanoparticle electrodes inhibited HER and improved the selectivity of CO_(2)RR to HCOOH.

关键词： acidic media CO_(2)electrolysis electrolyte additive hydrophobic interfacial microenvironment industrial-level current

Cloning, Characterization and Transformation of Methyltransferase 2a Gene (Zmet2a) in Maize (Zea mays L.)

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1767-1779页

作者： Xin Qi Yu wang Xing Zhang Xiaoshuang Wei Xinyang Liu Zhennan wang zhenhui wang Fenglou Ling Faculty of Agronomy Jilin Agricultural UniversityChangchun130118China Rice Research Center Jilin Agricultural UniversityChangchun130118China

DNA methylation is an important epigenetic regulatory mechanism,it regulates gene expression by recruiting proteins involved in gene repression or by inhibiting the binding of transcription factor(s)to *** this study,a novel methyltransferase 2a gene(Zmet2a)was cloned in maize and identiﬁed by polymerase chain reaction-base(PCR-base)using a bioinformatics *** Zmet2a cDNA sequence is 2739 bp long and translates to 912 amino acid *** Zmet2a protein revealed that it contains BAH and CHROMO structural domains,is a non-transmembrane protein that is hydrophilically unstable,and has no signal peptide ***,we veriﬁed the biological roles of Zmet2a using transgenic Arabidopsis overexpressing Zmet2a and Zmet2a-knockout *** Zmet2a Arabidopsis thaliana showed highly signiﬁcant advancement inﬂowering time,and Zmet2a-knockout maize showed advancement inﬂowering time,with signiﬁcant changes in several ***,these report the role of Zmet2a in the regulation ofﬂowering time,which will lay a foundation for revealing the biological function and epigenetic regulation mechanism of Zmet2a in the growth,development andﬂowering of maize.

关键词： DNA methylation methyltransferase Zea mays L ﬂowering time functional analysis

Derivation of Cloud-Free-Region Atmospheric Motion Vectors from FY-2E Thermal Infrared Imagery

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Advances in Atmospheric Sciences 2017年第2期34卷 272-282页

作者： zhenhui wang Xinxiu SUI Qing ZHANG Lu YANG Hang ZHAO Min TANG Yizhe ZHAN Zhiguo ZHANG Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters CMA Key Laboratory for Aerosol-Cloud PrecipitationNanjing University of Information Science and TechnologyNanjing 210044China School of Atmospheric Physics Nanjing University of Information Science and TechnologyNanjing 210044China Beijing Meteorological Office(Da Xing) Beijing 102600China

The operational cloud-motion tracking technique fails to retrieve atmospheric motion vectors （AMVs） in areas lacking cloud; and while water vapor shown in water vapor imagery can be used, the heights assigned to the retrieved AMVs are mostly in the upper troposphere. As the noise-equivalent temperature difference （NEdT） performance of FY-2E split win- dow （10.3-11.5 μm, 11.6-12.8 μm） channels has been improved, the weak signals representing the spatial texture of water vapor and aerosols in cloud-free areas can be strengthened with algorithms based on the difference principle, and applied in calculating AMVs in the lower troposphere. This paper is a preliminary summary for this purpose, in which the principles and algorithm schemes for the temporal difference, split window difference and second-order difference （SD） methods are introduced. Results from simulation and cases experiments are reported in order to verify and evaluate the methods, based on comparison among retrievals and the ＂truth＂. The results show that all three algorithms, though not perfect in some cases, generally work well. Moreover, the SD method appears to be the best in suppressing the surface temperature influence and clarifying the spatial texture of water vapor and aerosols. The accuracy with respect to NCEP 800 hPa reanalysis data was found to be acceptable, as compared with the accuracy of the cloud motion vectors.

关键词： atmospheric motion vector cloud-free area FY-2E IR split window imagery difference method

Statistics of cloud heights over the Tibetan Plateau and its surrounding region derived from CloudSat data

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Research in Cold and Arid Regions 2016年第1期8卷 72-81页

作者： ShengJie wang WenYing He HongBin Chen JianChun Bian zhenhui wang China Meteorological Administration Beijing 100081China LAGEO Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Nanjing University of Information Science&Technology NanjingJiangsu 210044China

Cloud-radiation interaction has a large impact on the Earth＇s weather and climate change, and clouds with different heights cause different radiative forcing. Thus, the information on the statistics of cloud height and its variation in space and time is very important to global climate change studies. In this paper, cloud top height （CTH）, cloud base height （CBH） and cloud thickness over regions of the Tibetan Plateau, south slope of the plateau and South Asian Monsoon are analyzed based on CloudSat data during the period from June 2006 to December 2007. The results show that frequency of CTH and CBH in unit area over the studied regions have certain temporal-spatial continuity. The CTH and CBH of different cloud types have different variation scopes, and their seasonal variations are distinct. Cloud thickness is large （small） in summer （winter）, and the percentages of different cloud types also have certain regularity.

关键词： CloudSat Tibetan Plateau cloud height cloud thickness

Evaluation on Radar Reflectivity-Rainfall Rate (Z-R) Relationships for Guyana

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Atmospheric and Climate Sciences 2016年第4期6卷 489-499页

作者： Komalchand Dhiram zhenhui wang Hydrometeorological Service Ministry of Agriculture Georgetown Guyana Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters CMA Key Laboratory for Aerosol-Cloud-Precipitation Nanjing University of Information Science & Technology Nanjing China School of Atmospheric Physics Nanjing University of Information Science & Technology Nanjing China

The constant development of science and technology in weather radar results in high-resolution spatial and temporal rainfall estimates and improved early warnings of meteorological phenomena such as flood [1]. Weather radars do not measure the rainfall amount directly, so a relationship between the reflectivity (Z) and rainfall rate (R), called the Z-R relationship (Z = aRb), where a and b are empirical constants, can be used to estimate the rainfall amount. In this research, mathematical techniques were used to find the best climatological Z-R relationships for the Low Coastal Plain of Guyana. The reflectivity data from the S-Band Doppler Weather Radar for February 17 and 21, 2011 and May 8, 2012 together with the daily rainfall depths at 29 rainfall stations located within a 150 km radius were investigated. A climatological Z-R relationship type Z = 200R1.6 (Marshall-Palmer) configured by default into the radar system was used to investigate the correlation between the radar reflectivity and the rainfall by gauges. The same data sets were used with two distinct experimental Z-R relationships, Z = 300R1.4 (WSR-88D Convective) and Z = 250R1.2 (Rosenfeld Tropical) to determine if any could be applicable for area of study. By comprehensive regression analysis, New Z-R and R-Z relationships for each of the three events aforementioned were developed. In addition, a combination of all the samples for all three events were used to produce another relationship called “All in One”. Statistical measures were then applied to detect BIAS and Error STD in order to produce more evidence-based results. It is proven that different Z-R relationships could be calibrated into the radar system to provide more accurate rainfall estimation.

关键词： Radar Reflectivity Rain Gauges Rainfall Rate Z-R Relationships Correlation