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A study on neogene volcanic landforms of the middle Tanlu fault belt

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Journal of Geographical Sciences 2000年第4期10卷 121-128页

作者： han mei (geography department, shandong normal university, jinan 250014,china) 山东师范大学山东济南

The west block of the middle belt of TanLu fault belt is one of the areas where volcanic landforms are mainly distributed. This paper divides the volcanic landforms into four grades according to formation, morphology, and ingredient of matter. Lava cones are divided into two types based on the force of top-support and the fluid form of magma: the arc-projecting type and spring-spilling type. Furthermore, the courses of development of volcanic landforms are divided into three stages according to the form and strength of volcanic activities.

关键词： volcanic landforms Neogene TanLu fault belt

Formation and Evolution of Ancient Lakes on South Coast Plain of Laizhou Bay

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Chinese Journal of Population,Resources and Environment 2005年第4期3卷 26-32页

作者： han mei 1, Zhou Baohua 2, Yang Peilin 1,Gao Guiqin 1 & Zhang Weiying 1 1. department of geography, shandong normal university, jinan 250014, china 2. department of geography, jinan university, jinan 250001, china department of geography Shandong Normal University Jinan 250014 China department of geography Jlnan University Jinan 250001 China

Based on the data of historical geography, the analysis of the stratigraphic section, and the textual research of place names and satellite photographic interpretations, the authors study the formation and evolution of ancient lakes on the south coast plain of Laizhou Bay where there were once three lakes: Judian Lake, Qingshuibo Lake and Biehua Lake. All the lakes formed 6000 years ago evolved from the lagoons near the estuary and went through two periods, the golden age in the Middle Holocene and the shrinking age in the Late Holocene. The disappearance of the lakes resulted from the drying climate, the migration of the river courses and the activities of human beings. Among the three reasons, the migration of the river courses is the main one.

关键词： ancient lake cause historical evolution south coast plain of Laizhou Bay

Sedimentary Characteristics,Ages,and Environmental Significance of Gravel Deposits and Loess in shandong,Eastern china:Regional Response to Global Change Since the Last Glacial Period

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 491-504页

作者： WANG Min KONG Fanbiao KONG Xianglun CHEN Haitao WANG Jiawei MIAO Xiaodong JIA Guangju han mei XU Shujian department of geography and Tourism Qilu Normal UniversityJinan 250014China School of geography and Environment Shandong Normal UniversityJinan 250014China shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection Linyi UniversitySchool of Resources and EnvironmentLinyiShandong 276005China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdaoShandong 266590China

Investigation of rarely studied gravel layers found in the loess in shandong Province,eastern china,reveals the fabric characteristics of two gravel layers(G1,G2)and the sedimentary characteristics of loess at the typical and well-preserved Heiyu section(HY),where,to determine the paleoclimatic changes during Marine Isotope Stage *** stimulated luminescence dates of the HY formation range from 0.26±0.02 ka to 39.00±2.00 *** addition,the ages of G1 and G2 were estimated using the Bayesian model to be 39.60-40.50 and 29.00-29.50 ka.G1 and G2 are mainly composed of fine and medium gravel,both of which were subangular to subrounded limestone,with gravel directions to NE and *** average flow velocity,average depth,and flood peak flow of G1 are 1.10 m/s,0.49 m,and 37.04 m^(3)/s,respectively,calculated using the flow energy method,whereas those of G2 are 0.98 m/s,0.38 m,and 18.38 m^(3)/s,*** of climate proxy indices show that the sedimentary environment of the gravel and loess in HY might be a regional response to global change.

关键词： paleoenvironment geochronology gravel layer sedimentology Pleistocene shandong Province

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莱州湾沿岸的地貌类型

山东师范大学学报（自然科学版） 1996年第3期11卷 63-67页

作者：韩美孟庆海山东师范大学地理学系

通过野外实地考察，室内卫片、地形图分析，并参照前人研究成果，对莱州湾沿岸地貌类型作了系统分类．

关键词：地貌类型海水入侵陆地地貌类型海岸地貌类型

Echocardiographic Measurements in normal Chinese Adults(EMINCA)II focusing on left ventricular and left atrial size and function by three-dimensional echocardiography

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Frontiers of Medicine 2024年第4期18卷 649-663页

作者： Yingbin Wang Yu Zhang Guihua Yao Hong Tang Lixin Chen Lixue Yin Tiangang Zhu Jianjun Yuan Wei han Jun Yang Xianhong Shu Ya Yang Yulin Wei Yanli Guo Weidong Ren Dongmei Gao Guilin Lu Ji Wu Hongning Yin Yuming Mu Jiawei Tian Lijun Yuan Xiaojing Ma Hongyan Dai Yunchuan Ding Mingyan Ding Qing Zhou Hao Wang Di Xu mei Zhang Yun Zhang State Key Laboratory for Innovation and Transformation of Luobing Theory Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesDepartment of CardiologyQilu Hospital of Shandong UniversityJinan250012China department of Cardiology Qilu Hospital of Shandong University(Qingdao)Qingdao266000China department of Ultrasonography West China HospitalSichuan UniversityChengdu610041China department of Ultrasonography Shenzhen People’s Hospital/The Second Clinical Medical College of Jinan UniversityShenzhen518020China department of Ultrasonography Electronic Science and Technology University of ChinaThe Affiliated Sichuan Provincial People’s HospitalChengdu610072China department of Cardiology Peking University People’s HospitalBeijing100044China department of Ultrasonography Henan Provincial People’s HospitalZhengzhou463599China department of Cardiology The First Affiliated Hospital of Harbin Medical UniversityHarbin150007China department of Echocardiology The First Affiliated Hospital of China Medical UniversityShenyang110001China department of Echocardiology Zhongshan HospitalFudan UniversityShanghai200032China department of Echocardiology Beijing Anzhen HospitalCapital Medical UniversityBeijing100029China department of Cardiology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou510120China department of Ultrasonography The Southwest Hospital of AMUChongqing400038China department of Ultrasonography Shengjing Hospital of China Medical UniversityShenyang110136China department of Ultrasonography China-Japan Union hospital of Jilin UniversityChangchun130033China department of Ultrasonography First Affiliated HospitalSchool of MedicineShihezi UniversityShihezi832000China department of Ultrasonography The First Affiliated Hospital of Guangxi Medical UniversityNanning537406China department of Echocardiology The Second Hospital of Hebei Medical Uni

Current guidelines encourage large studies in a diverse population to establish normal reference ranges for three-dimensional(3D)echocardiography for different ethnic *** study was designed to establish the normal values of 3D-left ventricular(LV)and left atrial(LA)volume and function in a nationwide,population-based cohort of healthy han Chinese adults.A total of 1117 healthy volunteers aged 18–89 years were enrolled from 28 collaborating laboratories in *** sets of 3D echocardiographic instruments were used,and full-volume echocardiographic images were recorded and transmitted to a core laboratory for image analysis with a vendor-independent off-line ***,866 volunteers(mean age of 48.4 years,402 men)were qualified for final *** parameters exhibited substantial differences between different sex and age groups,even after indexation by body surface *** normal ranges of 3D-LV and 3D-LA volume and function differed from those recommended by the American Society of Echocardiography and the European Association of Cardiovascular Imaging guidelines,presented by the World Alliance Societies of Echocardiography(WASE)study,and from the 2D values in the EMINCA *** normal reference values of 3D echocardiography-derived LV and LA volume and function were established for the first time in healthy han Chinese *** ranges of 3D-LV and 3D-LA echocardiographic measurements stratified with sex,age,and race should be recommended for clinical applications.

关键词： three-dimensional echocardiography left ventricle left atrium normal reference values Chinese adults

退耕还林(草)工程前后黄河流域生态系统碳储量时空演变与模拟预测

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环境科学 2024年第10期45卷 5943-5956页

作者：段绪萌韩美孔祥伦孙金欣张慧欣山东师范大学地理与环境学院黄河三角洲水土资源保护和高质量发展特色实验室济南250358

“双碳”背景下,探讨退耕还林(草)工程实施对黄河流域生态系统碳储量的影响,对于完善新一轮退耕还林(草)工程政策实施,提高黄河流域生态系统碳汇能力具有重要参考意义.选取退耕还林(草)工程实施前的1990年作为研究时段的起始年,选择两... 详细信息

“双碳”背景下,探讨退耕还林(草)工程实施对黄河流域生态系统碳储量的影响,对于完善新一轮退耕还林(草)工程政策实施,提高黄河流域生态系统碳汇能力具有重要参考意义.选取退耕还林(草)工程实施前的1990年作为研究时段的起始年,选择两轮工程实施结束后的2020年作为研究时段的终了年,基于1990~2020年的30 a生态系统类型数据,运用InVEST模型对1990~2020年间黄河流域工程实施区域生态系统的土壤碳库、地上碳库、地下碳库、死亡有机质碳库及总碳储量进行逐年核算.基于2020年生态类型数据,运用PLUS模型对2035年自然发展、深度退耕、中度退耕和耕地保护这4种情景的生态系统栅格数据进行预测,进而测算生态系统的总碳储量.结果表明:①1990~2020年,黄河流域森林生态系统的面积在两轮工程实施后扩张26610.06 km^(2),农田面积减少46849.06 km^(2);空间上,黄河上游以草地、其他生态系统为主,黄河中游主要以农田、森林和草地生态系统分布为主,黄河下游以农田生态系统为主;②1990~2020年工程实施区碳储量呈波动增加趋势,2009年时总碳储量达到峰值(219.47×10^(8) t),2010~2020年由于草地生态系统的减少导致总碳储量波动下降至2020年的218.59×10^(8) t;空间上,碳储量高值区分布在林草聚集的上游四川阿坝藏族羌族自治州、甘肃南部等和中游山西全域、陕西中南部等,陕西商洛和内蒙古的阿拉善盟为平均碳密度最高和最低的地级市;③2035年的自然发展情景碳储量损失0.83×10^(8) t,其余3种情景均增加.中度退耕情景下,黄河流域生态系统固碳能力最强,预测碳储量比2020年增加2.72×10^(8) t,深度退耕情景为综合性最优情景.因此,未来黄河流域可以参考深度退耕情景来优化调整退耕还林(草)工程实施方案,同时碳储量预测值可为实现双碳目标提供一定数据支持.

关键词：黄河流域碳储量时空演变特征未来趋势 PLUS模型 InVEST模型

Theoretical insight into the mechanism of Pt（Ⅱ）-catalyzed[3+2]cycloaddition reactions of propadienyl silyl ethers with alkenyl ethers

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Theoretical insight into the mechanism of Pt（Ⅱ）-catalyzed...

基于文献计量和可视化分析的河流生态健康评价研究进展与展望

第六届全国物理无机化学会议

作者： Chun-mei Du~a,Ling-Li han~b,Tao Liu~b,Zhang-Yu Yu~(a,*) a School of Chemistry and Chemical Engineering,Qufu normal university,Qufu 273165,shandong, china b department of Chemistry and Chemical Engineering,Jining university,Qufu 273155,shandong, china

＜正＞The Pt（Ⅱ）-catalyzed[3+2]cycloaddition reactions of propadienyl silyl ethers with alkenyl ethers have been investigated by performing DFT calculation using Gaussian-03 software package[1].We calculate the mechanism proposed by Iwasawa et al[2]about the cycloaddition reactions of triisopropylsilyl（TIPS） 1,2-propadienyl ether （1a） with 2-methoxypropene（2a）,tert-butyldiphenylsilyl（TBDPS） 1,2-propadienyl ether（1b） with 2a,respectively

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来源： cnki会议评论

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西安理工大学学报 2024年第1期40卷 1-14页

作者：张向徐韩美倪娟孔祥伦山东师范大学地理与环境学院山东济南250358 山东城市建设职业学院山东济南250103

针对目前河流健康相关综述研究趋势分析浅显、内容不全面的问题,本文在对CNKI和Web ofScience数据库中河流健康相关文献的统计与分析的基础上,对国内外研究趋势进行了梳理,对水质、水文、生境和生物等模块与指标、权重确定方法和评价模... 详细信息

针对目前河流健康相关综述研究趋势分析浅显、内容不全面的问题,本文在对CNKI和Web ofScience数据库中河流健康相关文献的统计与分析的基础上,对国内外研究趋势进行了梳理,对水质、水文、生境和生物等模块与指标、权重确定方法和评价模型等进行了归纳和对比分析。结果表明:①1998—2010年发达国家是文献的主要增长力量,而2010—2022年文献的增长则主要来自发展中国家的贡献;基于CiteSpace的国内研究热点分析表明当前研究聚焦于评价与保障河流生态和社会功能。②水质评价已较成熟,但缺乏对药物、微塑料等新兴污染物的评价;水文评价常用水文学法确定生态流量,对生态环境的具体需要有所忽略,天然径流量也缺乏统一的计算方法;生境评价研究有从实地考察转向以遥感监测为主的趋势;生物评价已成为河流健康评价最重要的手段,eDNA等技术的应用使实时生物数据监测成为可能。③指标赋权轻视主观赋值,不利于明确评价的重点;评价模型缺乏有效性对比与障碍因子识别研究。针对研究存在的不足,对未来的研究方向进行了展望,包括科学界定指标的阈值、明晰河流健康的敏感因子与驱动因素、开展河流分级分类研究和与流域高质量发展的耦合研究等四个方面。

关键词：河流生态健康文献计量评价指标评价模型高质量发展

POLARON IN TRIBLOCK COPOLYMERS UNDER ELECTRIC FIELDS

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POLARON IN TRIBLOCK COPOLYMERS UNDER ELECTRIC FIELDS