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Chinese Science Bulletin 2010年第11期55卷 1067-1076页

作者： liu JiQiang CHEN lihui NI Pei State Key Laboratory for Mineral Deposit Research Institute of Geo-Fluid Research School of Earth Sciences and Engineering Nanjing Univer-sity Nanjing 210093 China

Fluid and melt inclusions in mantle xenoliths are thought as direct samples to study mantle liquids. Here we apply Raman mi- crospectroscopy and microthermometry to fluid/melt inclusions in lherzolite xenoliths in Qiaoshan basalts, a Miocene volcano in Linqu, Shandong Province, eastern China. These inclusions include (1) early CO2 fluid inclusions, (2) early carbonate melt inclu-sions, (3) late CO2 fluid inclusions, and (4) late silicate melt inclusions. Among the early CO2 fluid inclusions, most consist of high-density pure CO2, while others have small amounts of other components besides of CO2, including graphite, magnesite, Mg-calcite, CO and N2. The lowest trapping pressures are estimated to be 1.42 GPa and 0.80 GPa for the early and the late fluid inclusions, respectively. Because orthopyroxene is the main host mineral for the early carbonate melt inclusions, we propose that the formation of these carbonate melts is genetically associated with the interactions between CO2 fluids and silicate minerals, e.g. olivine and clinopyroxene. The diversity of minor components in the early CO2 fluid inclusions indicates that mantle peridotites had undergone redox reactions with penetrating fluids/melts. These observations suggest that the compositions of the lithospheric mantle beneath the studied area had been changed by asthenosphere-derived CO2-rich fluids/melts.

关键词：流体包裹体熔融包裹体岩石圈地幔地幔包体相互作用中国东部软流圈山东省

Considering time-lag effects can improve the accuracy of NPP simulation using a light use efficiency model

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Journal of Geographical Sciences 2023年第5期33卷 961-979页

作者： LI Chuanhua liu Yunfan ZHU Tongbin ZHOU Min DOU Tianbao liu lihui WU Xiaodong College of Geography and Environmental Science Northwest Normal UniversityKey Laboratory of Resource Environment and Sustainable Development of OasisLanzhou730070China Cryosphere Research Station on the Qinghai-Tibet Plateau State Key Laboratory of Cryospheric ScienceNorthwest Institute of Eco-Environment and ResourcesCASLanzhou730000China

Most terrestrial models synchronously calculate net primary productivity(NPP)using the input climate variable,without the consideration of time-lag effects,which may increase the uncertainty of NPP *** on Normalized Difference Vegetation Index(NDVI)and climate data,we used the time lag cross-correlation method to investigate the time-lag effects of temperature,precipitation,and solar radiation in different seasons on NDVI ***,we selected the Carnegie-Ames-Stanford approach(CASA)model to estimate the NPP of China from 2002 to *** results showed that the response of vegetation growth to climate factors had an obvious lag effect,with the longest time lag in solar radiation and the shortest time lag in *** time lag of vegetation to the climate variable showed great tempo-spatial heterogeneities among vegetation types,climate types,and vegetation growth *** on the validation using eddy covariance data,the results showed that the simulation accuracy of the CASA model considering the time-lag effects was effectively *** considering the time-lag effects,the average total amount of NPP modeled by CASA during 2001-2017 in China was 3.977 PgC a^(−1),which is 11.37%higher than that of the original *** study highlights the importance of considering the time lag for the simulation of vegetation growth,and provides a useful tool for the improvement of the vegetation productivity model.

关键词： net primary productivity(NPP) time-lag effects CASA model climate change

Crack Length Quantification Based on Planar Eddy-Current Sensor Array and Two-Dimensional Image

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第6期35卷 1047-1052页

作者： liu lihui Tian Wugang Pan Mengchun Chen Dixiang Xie Ruifang Ren Yuan College of Mechatronics and Automation National University of Defense Technology

Eddy-current (EC) testing is an effective electromagnetic non-destructive testing (NDT) *** eddy-current sensor arrays have several advantages such as good coherence,fast response speed,and high sensitivity,which can be used for micro-damage inspection of crucial parts in mechanical equipments and aerospace *** main purpose of this research is to detect the defect in a metallic material surface and identify the length of a crack using planar eddy-current sensor arrays in different *** principle and characteristics of planar eddy-current sensor arrays are introduced,and a crack length quantification algorithm in different directions is investigated.A damage quantitative detection system is established based on a field programmable gate array and ARM *** system is utilized to inspect the micro defect in a metallic material,which is carved to micro crack with size of 7mm(length)×0.1mm(width)×1mm(depth).The experimental data show that the sensor arrays can be used for the length measurement repeatedly,and that the uncertainty of the length measurement is below ±0.2mm.

关键词： crack planar eddy-current sensor array non-destructive testing(NDT) quantification 2-D image

Three-dimensional particle simulation of ion thruster plume flows with EX-PWS

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Plasma Science and Technology 2018年第10期20卷 118-126页

作者： Hongru ZHENG Guobiao CAI Hongyue WANG lihui liu Bijiao HE School of Astronautics Beihang UniversityBeijing 100191People＇s Republic of China Beijing Institute of Aerospace Testing Technology Beijing 100074People＇s Republic of China

Ion thruster plumes from a multi-thruster array of different working configurations are simulated by a hybrid fluid-particle software. The particle in cell method is employed to model the transports of ions. The direct simulation Monte Carlo method is used to model momentum and charge exchange （CEX） collisions. The software is based on unstructured grids which make it easy to handle with complex geometry. The results of chamber simulation are compared with experimental data in ion current density and number density, which show good agreements. The maximum difference of current density along the thruster centerline is less than 9.30%. The interaction effects of plumes when multiple thrusters are operating in vacuum are predicted. Distributions of single charged xenon ions are significantly different in the near-field plume flow, however, merge into one in the far downstream region. Moreover, the interaction effect on the spatial distribution of CEX xenon ions is displayed as well.

关键词： electric propulsion multi-thruster array PIC-DSMC method ion thruster plume

Lead‑Free Perovskite Materials for Solar Cells

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Nano-Micro Letters 2021年第4期13卷 110-145页

作者： Minghao Wang Wei Wang Ben Ma Wei Shen lihui liu Kun Cao Shufen Chen Wei Huang Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&Telecommunications(NUPT)9 Wenyuan RoadNanjing 210023People’s Republic of China Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’an 710072People’s Republic of China

The toxicity issue of lead hinders large-scale commercial production and photovoltaic field application of lead halide *** novel non-or low-toxic perovskite materials have been explored for development of environmentally friendly lead-free perovskite solar cells(PSCs).This review studies the substitution of equivalent/heterovalent metals for Pb based on first-principles calculation,summarizes the theoretical basis of lead-free perovskites,and screens out some promising lead-free candidates with suitable bandgap,optical,and electrical ***,it reports notable achievements for the experimental studies of lead-free perovskites to date,including the crystal structure and material bandgap for all of lead-free materials and photovoltaic performance and stability for corresponding *** review finally discusses challenges facing the successful development and commercialization of lead-free PSCs and predicts the prospect of lead-free PSCs in the future.

关键词： Solar cells Perovskite Lead-free First-principles calculation Photovoltaic

An underwater vest containing an antioxidant MXene hydrogel for sensitive recognition of fish locomotion

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Microsystems & Nanoengineering 2024年第2期10卷 115-131页

作者： Chengxiu Yang Jiafei Hu lihui liu Shaowei Wu Mengchun Pan Yan liu Haomiao Wang Peisen Li Qi Zhang Weicheng Qiu Huihui Luo College of Intelligence Science and Technology National University of Defense TechnologyChangsha410073China

The perception of fish locomotion is important for understanding their adaptive behaviors and ethological ***,the main strategy used for extracting fish attitudes involves the use of a vision-based monitoring system,which is limited in its range of observation and cannot perform tracking for long ***,we report the use of a wearable tagging electronic device,referred to as an underwater vest,to capture the surrounding flow field disturbances triggered by swimming or momentary postural *** of these goals were achieved by integrating a pair of pseudocapacitive pressure-sensing units and a flexible circuit ***,additional conditions,such as variable hydraulic pressures and minimal changes in fish posture,require high stability and sensitivity of the sensing ***,hybrid hydrogel electrodes were developed through cross-linking MXene with holey-reduced graphene oxide nanosheets and further modification with 1-ethyl-3-methylimidazolium dicyanamide ionic liquids,which increased the interfacial capacitance and long-term interfacial activity of the ***,the sensing unit exhibited ultrahigh sensitivity(S_(max)~136,207 kPa^(−1))in an aquatic environment for 60 days and superior high-pressure resolution(10 Pa)within a wide working range of 1 ***,an underwater vest integrated with such sensing units clearly distinguished and recorded fish *** believe that the designed device may open avenues in flow field monitoring and ocean current detection and provide new insights into the development of sensitive underwater tagging.

关键词： underwater fish linking

The inhibiting effect of 1.4 recombinant P chromosome of wheat-Agropyron cristatum addition line on the Ph gene

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Chinese Science Bulletin 2010年第2期55卷 153-157页

作者： YANG GuoHui YANG XinMing WANG RuiHui GAO AiNong LI lihui liu WeiHua National Key Facility for Crop Gene Resources and Genetic bnprovement/lnstitute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081 China

P chromosomes may carry a genetic system that inhibits the Ph gene in wheat. Abnormal chromosome synapsis in wheat-Agropyron cristatum addition line II-21-2 (additional 1·4 recombinant P chromosome) was observed in this study. The results of cytogenetics and Ph1 gene amplification showed that the Ph1 gene was normal and the average number of quadrivalents or hexavalents was determined to be 0.41 and 0.13, respectively, in pollen-mother cells of wheat-Agropyron cristatum addition line II-21-2. The analysis of dual-color GISH/FISH showed that the P chromosomes were not directly involved in the composition of multivalents but could inhibit the effect of the Ph gene, leading to synapsis of wheat homoeologous chromosomes and translocation between wheat homoeologous chromosomes such as 3B-3D chromosomes. The characteristic of P chromosomes’ promoting synapsis of wheat homoeologous chromosomes may have potential application in the genetic improvement of wheat.

关键词：染色体重组 Ph基因附加系小麦抑制作用冰草同源染色体电话

Stable and Efficient Red Perovskite Light-Emitting Diodes Based on Ca^(2+)-Doped CsPbI_(3)Nanocrystals

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Research 2021年第1期2021卷 1192-1202页

作者： Wei Shen Jianbin Zhang Ruimin Dong Yanfeng Chen liu Yang Shuo Chen Zhan Su Yujun Dai Kun Cao lihui liu Shufen Chen Wei Huang State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China Frontiers Science Center for Flexible Electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi’an 710072China

α-CsPbI_(3)nanocrystals(NCs)with poor stability prevent their wide applications in optoelectronic ***^(2+)(1.00Å)as a new B-site doping ion can successfully boost CsPbI_(3)NC performance with both improved phase stability and optoelectronic *** a Ca^(2+)/Pb^(2+)ratio of 0.40%,both phase and photoluminescence(PL)stability could be greatly *** by increased tolerance factor,the cubic phase of its solid film could be maintained after 58 days in ambient condition or 4 h accelerated aging process at 120℃.The PL stability of its solution could be preserved to 83%after 147 days in ambient *** using UV light to accelerate aging,the T50 of PL could boost 1.8-folds as compared to CsPbI_(3)*** Ca^(2+)doping can dramatically decrease defect densities of films and reduce hole injection barriers,the red light-emitting diodes(LEDs)exhibited about triple enhancement for maximum the external quantum efficiency(EQE)up to 7.8%and 2.2 times enhancement for half-lifetime of LED up to 85 *** believe it is promising to further explore high-quality CsPbI_(3)NC LEDs via a Ca^(2+)-doping strategy.

关键词： properties ambient maintained

Design of a grating by a joint optimization method for a phase-shifting point diffraction interferometer

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Chinese Optics Letters 2017年第10期15卷 66-70页

作者： Meng Zheng Ke liu lihui liu and Yanqiu Li Key Laboratory of Photoelectronic Imaging Technology and Systems Ministry of Education of ChinaSchool of OptoelectronicsBeijing Institute of TechnologyBeijing 100081China

A grating is an important element of a phase-shifting point diffraction interferometer, and the grating constant and duty cycle have a great impact on the interferometer, so the design of a grating becomes significant. In order to measure the projection objective with a numerical aperture of 0.2, we present a joint optimization method of a pinhole and grating based on scalar diffraction and the finite difference time domain method. The grating constant and the film thickness are selected, and the duty cycle of the grating is optimized. The results show that in the grating processing the material chromium is adopted, the thickness is 200 nm, and the grating constant is 15 μm. When the duty cycle is 55%, the interference fringe contrast is the greatest. The feasibility of the design result is further verified by experiment.

关键词： exp Design of a grating by a joint optimization method for a phase-shifting point diffraction interferometer

Antimicrobial resistance and molecular typing of Salmonella in the chicken production chain in Hubei Province, China

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Animal Diseases 2023年第3期3卷 188-201页

作者： Cuirong Wu lihui liu Yuxin Sui Lulu Huang Yang Chen Haihong Hao Yuanhu Pan Zhenli liu Guyue Cheng National Reference Laboratory of Veterinary Drug Residues(HZAU)and MAO Key Laboratory for Detection of Veterinary Drug Residues Huazhong Agricultural UniversityWuhanHubeiChina Department of Animal Husbandry and Veterinary Medicine Chengdu Agricultural CollegeChengduSichuanChina MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products Huazhong Agricultural UniversityWuhanHubeiChina

Salmonella is a significant foodborne zoonotic pathogen that endangers both human and animal *** goal of this research is to gain a preliminary understanding of Salmonella contamination and antimicrobial resistance in the chicken production chain in Hubei Province,China.1149 animal and environmental samples were collected from chicken farms,slaughterhouses,and retail markets in six cities across Hubei Province in China from 2019 to 2020,yielding Salmonella isolation rates of 4.68%(28/598),12.21%(47/385),and 9.64%(16/166),*** distinct serotypes were detected among 53 non-clonal Salmonella strains,of which Meleagridis(26.42%,14/53)was the dominant *** half of the strains(49.06%,26/53)were multi-drug resistant(MDR).Whole-genome sequencing(WGS)showed that 10 resistance genes(tetA,bla_(TEM),parC,qnrs1,floR,aac(6'-ly,aph(6)-ld,aph(3")-b,aac(6')-laa and sul2)and 7 categories of virulence genes were present in all three links in 22 non-clonal dominant serotype *** was shown that Salmonella in the chicken production chain in Hubei Province had a high resist-ance rate to Tetracycline(TET,73.58%),Ofloxacin(OFL,69.81%),Florfenicol(FFC,60.38%)and Ampicillin(AMP,39.62%)which was consistent with the widespread use of these drugs in the husbandry industry in *** ST types determined by MLST and serotypes determined by WGS had a one-to-one *** spanning tree analysis revealed that there was cross contamination of Salmonella in farms and slaughterhouses,slaughterhouses and markets,animal samples and environmental *** work provides useful information for the prevention and control of contamination and antimicrobial resistance of Salmonella in the chicken production chain,as well as demonstrating the dependable role of WGS in Salmonella molecular typing.

关键词： Salmonella Serotype Antimicrobial resistance Multi-locus sequence typing Whole genome sequencing