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Sino-African Natural Gas Cooperation and Prospects

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China Oil & Gas 2023年第3期30卷 3-8页

作者： Lu Ruquan Luo Jiyu zhang yanyun Zhao Jie CNPC Economics&Techonology Research Institute

In recent years,a number of major oil and gas discoveries have been made in east and west Africa,which has become the focus of international investors.Especially after the Ukraine crisis,the European Union strengthened natural gas cooperation with African countries to replace natural gas imports from Russia,so the African natural gas exploration and development cooperation ushered in a period of opportunity.This will also play a huge role in promoting the industrialization of African countries.Sino-African energy cooperation enjoys a sound foundation.Although we still face various traditional and non-traditional risks and challenges,natural gas cooperation still has broad prospects.

关键词： African strengthened replace

Analysis and Recommendations on Overseas Oil and Gas Investment Environment Since 2022

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China Oil & Gas 2022年第4期29卷 49-55页

作者： Shang Yanli Xu Jinzhong zhang Chuanjin Feng He zhang yanyun CNPC Economics&Technology Research Institute Sinopec International Petroleum Exploration and Production Corporation(SIPC)

Since 2022, the game among the world’s major powers has intensified, and the overseas oil and gas investment environment has become complicated. Relations among countries in the Middle East have gradually eased, with a stable overall situation and a grim local situation, and the importance of resource countries has been highlighted, with expanding foreign energy cooperation, and diversified economic development。

关键词： investment Recommendations intensified

Home ranges and habitat vegetation characters in breeding season of Narcissus Flycatcher and Yellow-rumped Flycatcher

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Frontiers in Biology 2007年第3期2卷 345-350页

作者： WANG Ning zhang yanyun ZHENG Guangmei Ministry of Education Key Laboratory for Biodiversity Sciences and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing 100875China

The home ranges of the Narcissus Flycatcher(Ficedula narcissina elisae)and the Yellow-rumped Fly-catcher(F.zanthopygia)are measured by radio telemetry in a subalpine forest near Beijing,China.The home range is calculated by 100%Minimum Convex Polygon(MCP),and the area varies from 2,000 to 5,000 m2.The majority of fly-catchers can be found in the bottom of valleys and the under-side of mountains.It is fairly rare for both Flycatcher species to leave their nests more than 70 m.Individuals of the species in pair-banding and nest-detecting periods have larger home ranges than those in incubation and rearing periods.The levels of canopy coverage in the home ranges of Narcissus Flycatchers are significantly higher than that of Yellow-rumped Flycatchers.There are also more tall trees and stumps in the home ranges of Narcissus Flycatchers than in that of Yellow-rumped Flycatchers.The dominant tree species in the home ranges of Narcissus Flycatchers is Dahurian Birch(Betula dahurica),whereas Manchurian Walnut(Juglans mandshurica)is the dominant tree species in the home ranges of Yellow-rumped Flycatchers.

关键词： NarcissusFlycatcher Yellow-runpdeFlycatcher radiotelemetry home range habitat

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基于儿童思维发展特征的汉字教学路径探究

语言与文化研究

语言与文化研究 2024年第1期32卷 113-116页

作者：张严匀重庆人文科技学院重庆401520

儿童思维发展大致经历三个阶段,即“婴儿期”“幼儿期”和“童年期”,其中“幼儿期”和“童年期”是儿童接触汉字、认识汉字的重要阶段,汉字教学路径应当适应儿童不同阶段的思维特征进行探究。针对“幼儿期”儿童,教师可适当利用古文字... 详细信息

儿童思维发展大致经历三个阶段,即“婴儿期”“幼儿期”和“童年期”,其中“幼儿期”和“童年期”是儿童接触汉字、认识汉字的重要阶段,汉字教学路径应当适应儿童不同阶段的思维特征进行探究。针对“幼儿期”儿童,教师可适当利用古文字字形解字、利用幼儿“泛灵论”思维说字、利用幼儿“自我中心”思维说字;“童年期”儿童思维抽象化,教师可沟通字理、字词进行汉字教学。另外,汉字学习亦可培养儿童归纳、辨析、联想思维能力。

关键词：儿童思维特征汉字教学路径

基于PACS-HIS系统探讨PBL教学法在脑病科临床实习中的应用

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中国中医药现代远程教育 2024年第9期22卷 19-21页

作者：汪美霞何望生张梦张艳云安徽中医药大学第一附属医院脑病科安徽合肥230031 安徽中医药大学研究生院安徽合肥230038

目的基于影像存储和传输系统(PACS)-医院信息系统(HIS)探讨以问题为导向的教学方法(PBL)在脑病科临床实习中的应用。方法选择2021年1月—2022年1月在安徽中医药大学第一附属医院脑病科实习的76名临床医学生为研究对象,随机分为实验组(PA... 详细信息

目的基于影像存储和传输系统(PACS)-医院信息系统(HIS)探讨以问题为导向的教学方法(PBL)在脑病科临床实习中的应用。方法选择2021年1月—2022年1月在安徽中医药大学第一附属医院脑病科实习的76名临床医学生为研究对象,随机分为实验组(PACS-HIS-PBL)和对照组[讲授式教学法(LBL)组],比较两组出科考试成绩(包括基础理论和技能操作)及教学评价结果。结果在教学成果方面,实验组的基础理论成绩、技能操作成绩均明显高于对照组(P0.05)。结论基于PACS-HIS系统的PBL教学法在脑病科临床实习中取得了良好的教学效果,值得推广应用。

关键词： PBL PACS-HIS系统脑病科实习医生

Secondary solar heat gain modelling of spectral-selective glazing based on dynamic solar radiation spectrum

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Building Simulation 2023年第12期16卷 2211-2224页

作者： Peng Xue Yi Shen Sheng Ye Jinqing Peng yanyun zhang Qianqian zhang Yuying Sun Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology Beijing University of TechnologyBeijing 100124China Faculty of Architecture Civil and Transportation EngineeringBeijing University of TechnologyBeijing 100124China State Grid Zhongxing CO. LTDLvyuan BranchBeijing 100761China College of Civil Engineering Hunan UniversityChangsha 410082HunanChina Key Laboratory for New Functional Materials of Ministry of Education Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

The secondary solar heat gain,defined as the heat flows from glazing to indoor environment through longwave radiation and convection,grows with the increasing of glazing absorption.With the rapid development and application of spectrally selective glazing,the secondary solar heat gain becomes the main way of glazing heat transfer and biggest proportion,and indicates it should not be simplified calculated conventionally.Therefore,a dynamic secondary solar heat gain model is developed with electrochromic glazing system in this study,taking into account with three key aspects,namely,optical model,heat transfer model,and outdoor radiation spectrum.Compared with the traditional K-Sc model,this new model is verified by on-site experimental measurements with dynamic outdoor spectrum and temperature.The verification results show that the root mean square errors of the interior and exterior glass surface temperature are 3.25°C and 3.33°C,respectively,and the relative error is less than 10.37%.The root mean square error of the secondary heat gain is 13.15 W/m2,and the dynamic maximum relative error is only 13.2%.The simulated and measured results have a good agreement.In addition,the new model is further extended to reveal the variation characteristics of secondary solar heat gain under different application conditions(including orientations,locations,EC film thicknesses and weather conditions).In summary,based on the outdoor spectrum and window spectral characteristics,the new model can accurately calculate the increasing secondary solar heat gain in real time,caused by spectrally selective windows,and will provide a computational basis for the evaluation and development of spectrally selective glazing materials.

关键词： econdary solar heat gain spectral-selective glazing solar spectrum dynamic heat transfer

Impacts of global climate change on birds and marine mammals in Antarctica

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Advances in Polar Science 2017年第1期28卷 1-12页

作者： WU Fuxing DONE Lu zhang yanyun zhang Zhengwang Ministry of Education Key Laboratory for Biodiversity Sciences and Ecological Engineering College of Life SciencesBeijing Normal University Beijing 100875 China

Birds and marine mammals in Antarctica, especially penguins and seals, are top consumers and critical elements of the Southem Ocean ecosystem. As a region undergoing rapid global change, new challenges will be posed to the survival of these vertebrates species. Global climate change causes many alterations, such as ocean temperature rise, altered sea ice distribution, and abnormal climate events along with effects of intensive human activities, such as fishing. These not only directly affect the spatiotemporal distributions and population dynamics of Antarctic birds and marine mammals but also indirectly influence them via modification of their food resources. At present, the impact of climate change on birds and marine mammals in the Antarctica is focusing on a number of species in a few areas. Response mechanisms of these species are still very limited and therefore require further long-term and continuous monitoring and research.

关键词： Antarctica birds marine mammal global climate change

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磷掺杂调控碳纳米管负载的Ru促进碱性析氢

山东化工 2024年第1期53卷 1-6,11页

作者：苗红福张燕云王磊赖建平青岛科技大学化学与分子工程学院山东青岛266042 青岛科技大学环境与安全工程学院山东青岛266042

电解水制氢是一种高效清洁的产氢方式,但开发高效稳定的催化剂用于电解水仍面临很大挑战。本文通过磷掺杂策略调节负载于碳纳米管的钌纳米颗粒的电子结构,实现高效促进碱性析氢。经过对反应条件的优化,所得Ru-P@CNT(300)(CNT=碳纳米管)... 详细信息

电解水制氢是一种高效清洁的产氢方式,但开发高效稳定的催化剂用于电解水仍面临很大挑战。本文通过磷掺杂策略调节负载于碳纳米管的钌纳米颗粒的电子结构,实现高效促进碱性析氢。经过对反应条件的优化,所得Ru-P@CNT(300)(CNT=碳纳米管)催化剂具有最优的碱性析氢反应(HER)催化活性,其达到电流密度10 mA·cm^(-2)时仅需要38 mV的过电位。同时随着电流密度的逐渐增大,Ru-P@CNT(300)展现出了优于商用Pt/C的活性,说明随着电流的增大,其具有高于商用Pt/C的催化潜能。同时,该催化剂还表现出良好的催化稳定性。当Ru-P@CNT(300)用于碱性海水析氢中时,其表现出的活性与在纯1 mol/L KOH中几乎一致,没有出现明显衰退,10 mA·cm^(-2)处的过电位仅为39 mV,而且在海水中依然保持良好的稳定性。

关键词：掺杂钌基材料磷载体析氢

Chemical characterization and source identification of PM_(2.5) in Luoyang after the clean air actions

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Journal of Environmental Sciences 2022年第5期34卷 265-276页

作者： Min Xu Zirui Liu Bo Hu Guangxuan Yan Jianan Zou Shuman Zhao Jingxiang Zhou Xianhui Liu Xueping Zheng Xiaoyan zhang Jing Cao Mengshuang Guan Yirong Lv yanyun zhang State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of the Chinese Academy of Sciences Beijing 100049China Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control Henan Key Laboratory for Environmental Pollution ControlSchool of EnvironmentHenan Normal UniversityXinxiang 453007China Luoyang Eco-Environmental Monitoring Center of Henan Province Luoyang 471002China Luoyang Radiation Environment Service Office Luoyang 471002China 3 Clear Science&Technology Co. LtdBeijing 100029China

Luoyang is a typical heavy industrial city in China,with a coal-dominated energy structure and serious air pollution.Following the implementation of the clean air actions,the physic-ochemical characteristics and sources of PM_(2.5) have changed.A comprehensive study of PM_(2.5) was conducted from October 16,2019 to January 23,2020 to evaluate the effectiveness of previous control measures and further to provide theory basis for more effective policies in the future.Results showed that the aerosol pollution in Luoyang in autumn and win-ter is still serious with the average concentration of 91.1 μg/m^(3),although a large reduction(46.9%)since 2014.With the contribution of nitrate increased from 12.5%to 25.1%and sul-fate decreased from 16.7%to 11.2%,aerosol pollution has changed from sulfate-dominate to nitrate-dominate.High NO_(3)^(-)/SO_(4)^(2-)ratio and the increasing of NO_(3)^(-)/SO_(4)^(2-)ratio with the aggravation of pollution indicating vehicle exhaust playing an increasingly important role in PM_(2.5) pollution in Luoyang,especially in the haze processes.Secondary inorganic ions contributed significantly to the enhancement of PM_(2.5) during the pollution period.The high value of Cl^(-)/Na^(+)and EC concentration indicate coal combustion in Luoyang is still serious.The top three contributor sources were secondary inorganic aerosols(33.3%),coal combus-tion(13.6%),and industrial emissions(13.4%).Close-range transport from the western and northeastern directions were more important factors in air pollution in Luoyang during the sampling period.It is necessary to strengthen the control of coal combustion and reduce vehicle emissions in future policies.

关键词： Luoyang PM_(2.5) Chemical composition Source apportionment