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Variations in Column Concentration of Greenhouse Gases in China and Their Response to the 2015-2016 El Niño Event

Journal of Meteorological Research 2024年第3期38卷 608-619页

作者： Ningwei liU lingjun XIA Youjun DOU Shaorou DONG Jing WEN Ying WANG Rui FENG Ruonan WANG yuhe li Institute of Atmospheric Environment China Meteorological AdministrationShenyang110166China Jiangxi Ecological Meteorology Centre Nanchang330096China Beijing Xiangyuan Academy of Meteorological Observing Technology Beijing100081China Climate Centre of Guangdong Province Guangzhou510641China Guangdong Meteorological Service Guangzhou510062China liaoning Provincial Meteorological Equipment Support Centre Shenyang110166China Meteorological Centre of Northeast Air Traffic Administration of Civil Aviation of China Shenyang110161China

Since the industrial revolution,enhancement of atmospheric greenhouse gas concentrations as a result of human activities has been the primary cause of global *** monitoring and evaluation of greenhouse gases are significant prerequisites for carbon emission *** monthly data of global atmospheric carbon dioxide(CO_(2))and methane(CH4)column concentrations(hereinafter XCO_(2) and XCH_(4),respectively)retrieved by the Greenhouse Gas Observation Satellite(GOSAT),we analyzed the variations in XCO_(2)and XCH_(4)in China during 2010-2022 after confirming the reliability of the ***,the influence of a strong El Niño event in 2015-2016 on XCO_(2) and XCH_(4) variations in China was further *** results show that the retrieved XCO_(2) and XCH_(4) from GOSAT have similar temporal variation trends and significant correlations with the ground observation and emission inventory data of an atmospheric background station,which could be used to assess the variations in XCO_(2) and XCH_(4) in ***_(2) is high in spring and winter while XCH_(4) is high in *** XCO_(2) and XCH_(4) gradually declined from Southeast China to Northwest and Northeast China,with variation ranges of 401-406 and 1.81-1.88 ppmv,respectively;and the high value areas are located in the middle-lower Yangtze River ***_(2) and XCH_(4) in China increased as a whole during 2010-2022,with rapid enhancement and high levels of XCO_(2) and XCH_(4) in several *** significant increases in XCO_(2) and XCH_(4) over China in 2016 might be closely related to the strong El Niño-Southern Oscillation(ENSO)event during *** a global warming background in 2015,XCO_(2) and XCH_(4) increased by 0.768%and 0.657%in 2016 in *** analysis reveals that both the XCO_(2) and XCH_(4) variations might reflect the significant impact of the ENSO event on glacier melting in the Tibetan Plateau.

关键词： greenhouse gases column concentration CO_(2) CH4 El Niño-Southern Oscillation(ENSO) El Niño

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提问教学法在中学物理教学中的应用

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科教导刊 2024年第27期 139-141页

作者：李玉河民勤县西渠镇教学辅导站甘肃民勤733307

中学阶段的物理教学,承担着培养学生物理核心素养与自主学习能力的重要任务。提问教学法有助于激发学生的学习兴趣和思维能力,改善学生被动学习的局面,促进物理生成性课堂的构建。文章分析了提问教学法应用于中学物理教学中的必要性,顺... 详细信息

中学阶段的物理教学,承担着培养学生物理核心素养与自主学习能力的重要任务。提问教学法有助于激发学生的学习兴趣和思维能力,改善学生被动学习的局面,促进物理生成性课堂的构建。文章分析了提问教学法应用于中学物理教学中的必要性,顺应新课改的指导思想,根据教学目标和学生的实际情况,探索提问教学法的应用途径,旨在关注学生的主体地位和思维发展,实现以问促学的物理教改目标。

关键词：提问教学法中学物理应用必要性

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计算全息综合性光电教学实验设计

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实验室研究与探索 2024年第2期43卷 132-134,168页

作者：刘珂瑄朱昊何泽浩李玉和曹良才清华大学精密仪器系北京100084

基于傅里叶光学原理实现对目标光场进行精确重建,设计了从显示目标绘制,相应计算全息图生成到光学重建的综合性教学实验。具体的实验流程包含基于Visio的显示目标设计,基于MATLAB的相位型计算全息图生成算法编写和基于相位型液晶空间光... 详细信息

基于傅里叶光学原理实现对目标光场进行精确重建,设计了从显示目标绘制,相应计算全息图生成到光学重建的综合性教学实验。具体的实验流程包含基于Visio的显示目标设计,基于MATLAB的相位型计算全息图生成算法编写和基于相位型液晶空间光调制器的目标重建光路搭建。实验设计结合了光学、数字电路和计算机软件技术,具有流程清晰、易于教学、学生参与度高和获得感强的优势,可有效增强学生对计算全息技术与光电信息技术的理论理解与实操能力。

关键词：实验教学计算全息光场重建液晶空间光调制器

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Friction between a single platelet and fibrinogen

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Friction 2024年第10期12卷 2344-2354页

作者： yuhe WANG Yan li Shuguang ZHANG Haosheng CHEN Yongjian li State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China Key Laboratory of Agricultural Information Acquisition Technology Ministry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing 100083China

Friction has been considered to mediate physiological activities of cells,however,the biological friction between a single cell and its ligand-bound surface has not been thoroughly ***,we established a friction model for single cells based on an atomic force microscopy(AFM)combined with an inverted fluorescence microscopy(IFM)to study the friction between a highly sensitive platelet and fibrinogen-coated *** study revealed that the friction between the platelet and fibrinogen-coated tip is mainly influenced by specific ligand–receptor ***,we modeled the biological friction,which consists of specific interaction,non-specific interaction,and mechanical ***,the results suggested that the velocity can also affect specific ligand–receptor interactions,resulting in the friction change and platelet adhesion to fibrinogen *** study built a friction model between a single cell and its ligand-bound surface and provided a potential method to study the biological friction by the combination of AFM and IFM.

关键词： friction single cell platelet fibrinogen atomic force microscopy(AFM)

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Characterization and Expression of Ammonium Transporter in Peach (Prunus persica) and Regulation Analysis in Response to External Ammonium Supply

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Phyton-International Journal of Experimental Botany 2020年第4期89卷 925-941页

作者： Meiling Tang yuhe li Yahui Chen Lei Han Hongxia Zhang Zhizhong Song College of Agriculture Ludong UniversityYantai264025China Yantai Academy of Agricultural Sciences Yantai264000China Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong(Ludong University) Yantai264025China Key Laboratory of Forest Genetics&Biotechnology of Ministry of Education of China College of ForestNanjing Forest UniversityNanjing214008China

As the preferred nitrogen(N)source,ammonium(NH_(4)^(+))contributes to plant growth and development and fruit *** plants,NH 4+uptake is facilitated by a family of NH_(4)^(+) transporters(AMT).However,the molecular mechanisms and functional characteristics of the AMT genes in peach have not been mentioned *** this present study,excess NH_(4)^(+) stress severely hindered shoot growth and root elongation,accompanied with reduced mineral accumulation,decreased leaf chlorophyll concentration,and stunned photosynthetic *** addition,we identified 14 putative AMT genes in peach(PpeAMT).Expression analysis showed that PpeAMT genes were differently expressed in peach leaves,stems and roots,and were distinctly regulated by external NH_(4)^(+) *** cis-elements involved in abiotic stress adaption,Ca^(2+) response,light and circadian rhythms regulation,and seed development were observed in the promoters of the PpeAMT family *** analysis of residues within the C-terminal of PpeAMT proteins revealed many conserved phosphorylation residues in both the AMT1 and AMT2 subfamily members,which could potentially play roles in controlling the NH 4+transport *** study provides gene resources to study the biological function of AMT proteins in peach,and reveals molecular basis for NH_(4)^(+) uptake and N nutrition mechanisms of fruit trees.

关键词： Prunus persica AMT transporters regulation by NH_(4)^(+)supply cis-elements phosphorylation site analysis

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Synergy of heterogeneous Co/Ni dual atoms enabling selective C-O bond scission of lignin coupling with in-situ N-functionalization

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Journal of Energy Chemistry 2024年第5期92卷 16-25页

作者： Baoyu Wang Jinshu Huang Hongguo Wu Ximing Yan yuhe liao Hu li National Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide&Agricultural BioengineeringMinistry of EducationState-Local Joint Laboratory for Comprehensive Utilization of BiomassCollege of Pharmacy&Center for R&D of Fine ChemicalsGuizhou UniversityGuiyang 550025GuizhouChina Guangxi Key Laboratory of Green Chemical Materials and Safety Technology Beibu Gulf UniversityQinzhou 535011GuangxiChina Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640GuangdongChina

Selective cleavage of Csp^(2)-OCH_(3)bond in lignin without breaking other types of C-O bonds followed by N-functionalization is fascinating for on-purpose valorization of ***,a Co/Ni-based dual-atom catalyst CoNiDA@NC prepared by in-situ evaporation and acid-etching of metal species from tailor-made metal–organic frameworks was efficient for reductive upgrading of various lignin-derived phenols to cyclohexanols(88.5%–99.9%yields),which had ca.4 times higher reaction rate than the single-atom catalyst and was superior to state-of-the-art heterogeneous *** synergistic catalysis of Co/Ni dual atoms facilitated both hydrogen dissociation and hydrogenolysis steps,and could optimize adsorption configuration of lignin-derived methoxylated phenols to further favor the Csp^(2)-OCH_(3)cleavage,as elaborated by theoretical ***,the CoNi_(DA)@NC catalyst was highly recyclable,and exhibited excellent demethoxylation performance(77.1%yield)in real lignin monomer *** in-situ cascade conversion processes assisted by dual-atom catalysis,various high-value N-containing chemicals,including caprolactams and cyclohexylamines,could be produced from lignin.

关键词： Biomass conversion Heterogeneous catalysis lignin Dual-atom catalyst Selective C-ocleavage

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哈尔滨机场一次极端冻雨天气成因及气候背景分析

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气象与环境学报 2024年第1期40卷 1-8页

作者：王天竺孙超李裕赫何佳宇袁少华聂语勃中国民航东北地区空中交通管理局黑龙江分局黑龙江哈尔滨150078 中国民航东北地区空中交通管理局气象中心辽宁沈阳110000

基于观测资料和ERA5再分析资料,从环流背景、水汽追踪以及气候异常的角度,应用合成分析等方法,研究了2021年11月8日哈尔滨太平国际机场冻雨灾害天气的形成原因。结果表明:此次冻雨天气发生时哈尔滨机场上空温度具有显著的“冷-暖-冷”特... 详细信息

基于观测资料和ERA5再分析资料,从环流背景、水汽追踪以及气候异常的角度,应用合成分析等方法,研究了2021年11月8日哈尔滨太平国际机场冻雨灾害天气的形成原因。结果表明:此次冻雨天气发生时哈尔滨机场上空温度具有显著的“冷-暖-冷”特点,是典型的“融化机制”。850 hPa低空暖湿东南急流、低空逆温层的稳定维持和地面东北风控制下地表气温偏低2~4℃为此次过程的关键因素。通过拉格朗日轨迹模式(Hysplit),发现影响哈尔滨机场冻雨天气的水汽通道主要有3支,起源于鄂霍兹克海上空850 hPa高度的水汽通道2为此次降水过程的主要水汽通道,日本海为重要水汽源地。此次天气过程发生在双峰型拉尼娜事件气候背景下,高低空环流形势场和地面气压场、温度场较往年同期均表现出一定的异常特征。双峰拉尼娜年表现出低层暖湿气流偏强和地面温度偏低的异常特征,与此次过程相似。

关键词：冻雨天气环流背景水汽追踪拉尼娜

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Development and Application of lightning Protection Technologies in Power Grids of China

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高电压技术 2013年第10期39卷 2329-2343页

作者： GU Shanqiang CHEN Jiahong FENG Wanxing ZHAO Chun FANG yuhe li Tao State Grid Electric Power Research Institute Wuhan 430074 China

In recent years,along with the rapid expansion of power grids,the increasing complication of grid structures,and the development of smart grids and energy technologies,the lightning protection of power grids becomes increasingly *** grids of China have acquired significant achievements on lightning protection technologies,which are reviewed in this paper.A technical route of lightning protection is introduced in detail; it allows us to find problems through detection and measurement of lightning,to analyze problems through evaluation and simulation of lightning,to solve problems through lightning protection measures,and to prevent problems through hazard risk warning of *** the route,the technical breakthroughs of these four aspects in China are presented,including the chinese lightning detection network(CLDN),natural lightning observations,lightning faults detection at transmission lines,lightning current measurements,progresses in lightning distribution maps,lightning fault replays,lightning hazard risk evaluations,and lightning simulated experiments,as well as novel lightning protection *** practical devices and systems corresponding to the technologies mentioned above are also introduced and *** to the progress of lightning protection technologies in recent years,despite the rapidly growing length of transmission lines in China,the lightning accident rate is controlled at a certain level.

关键词：防雷技术电网结构中国灾害风险评估电模拟实验应用技术路线防雷措施

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UV-B irradiation enhances the accumulation of beneficial glucosinolates induced by melatonin in Chinese kale sprout

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Horticultural Plant Journal 2024年第4期10卷 995-1006页

作者： Mengyu Wang Jiansheng Wang yuhe Yang Zhiqing li Ghazala Mustafa Yubo li lihong liu Zuofa Zhang Qiaomei Wang Zhejiang Academy of Agricultural Sciences HangzhouZhejiang 310021China Key Laboratory of Horticultural Plant Growth Development and Quality ImprovementMinistry of AgricultureDepartment of HorticultureZhejiang UniversityHangzhouZhejiang 310058China Department of Plant Sciences Quaid-i-Azam UniversityIslamabad 45320Pakistan

Cruciferous sprout is a new form of vegetable product rich in bioactive compounds,especially *** studies have focused on increasing the accumulation of glucosinolates in cruciferous sprouts by applying different chemical regulators,with a particular focus on their contribution to nutritional quality and health ***,the effects of melatonin and UV-B irradiation on glucosinolate biosynthesis remain *** this study,it was found that changes in melatonin concentrations significantly affected the contents of individual as well as total aliphatic and indolic *** 5μmol·L^(-1)melatonin was decided as the optimum concentration that could increase the content of beneficial glucosinolates including glucoraphanin and 4-methoxy glucobrassicin in Chinese kale ***,the enhancement of glucosinolate accumulation by melatonin treatment could be further amplified by UV-B ***,our results showed that R2R3-MYB transcription factor BoaMYB28 and BoaMYB51,which are central regulators of aliphatic and indolic glucosinolate biosynthesis respectively,were both involved in the regulation of glucosinolate biosynthesis by melatonin and UV-B ***,the expression of glucosinolate biosynthetic genes,including BoaCYP79F1,BoaCYP83A1,BoaSUR1,BoaUGT74B1,BoaCYP79B2,BoaCYP79B3,and BoaCYP83B1 participated in the formation of core structures and BoaFMOGS-OX5,BoaAOP2,BoaCYP81F2,and BoaIGMT1 involved in the sidechain modification of aliphatic and indolic glucosinolate,was regulated by melatonin or UV-B *** together,these findings provide a potential strategy for improving the nutritional quality and resistance of Chinese kale sprouts.

关键词： Melatonin Chinese kale sprouts UV-B Glucosinolates Nutritional quality Second metabolism

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Experimental Study on Electrostatically Actuated Micro-Gripper Based on Silica Process

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World Journal of Engineering and Technology 2017年第4期5卷 126-133页

作者： Pengnian Yang yuhe li Yong li Qingxiang li Department of Precision Instruments and Mechanology Tsinghua University Beijing China

The characteristics of a kind of comb-drive electrostatic actuated micro-gripper are tested. The test platform using a microscope-CCD-computer, the state information of the micro-gripper obtained by data acquisition and image processing, voltage-displacement characteristic curve is obtained and the mathematical equation is established. The analysis of the characteristic equation has shown the consistency and rationality of the theoretical design and the experimental results. The main factors that cause the difference between the theoretical design and the actual test performance are analyzed, and the design method and experimental results is obtained for the micro-gripper in the field of micro-assembly.

关键词： Micro-Gripper Image Process Experimental Analysis

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