检索结果-南通市图书馆

Application of stable isotope techniques to the study of soil salinization

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Journal of Arid Land 2011年第4期3卷 285-291页

作者： YongQin CUI jianying ma Wei SUN Dunhuang Gobi and Desert Ecology and Environment Research Station Cold and Arid Regions Environmental and Engineering Research Institute CAS Lanzhou 730000 China Key Laboratory of Vegetation Ecology Ministry of Education Institute of Grassland Sciences Northeast Normal University Changchun 130024 China

In this paper,we reviewed the progress in the application of stable isotope techniques to the study of soil *** a powerful technique,stable isotopes have been widely used in the studies of soil water evaporation,the dynamics of soil salinization and salt-tolerant plant *** impact of single environmental factors on plant isotope composition has been the focus of previous ***,the impact of multiple environmental factors on plant isotope composition remains unclear and needs to be carefully *** order to gain insights into soil salinization and amelioration,especially soil salinization in arid and semiarid areas,it is essential to employ stable isotope techniques and combine them with other methods,such as located field observation and remote sensing technology.

关键词： stable isotope soil water evaporation soil salinization dynamic salt-tolerant plants breeding

A preliminary study of water use strategy of desert plants in Dunhuang,China

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Journal of Arid Land 2015年第1期7卷 73-81页

作者： YongQin CUI jianying ma Wei SUN JiaHuan SUN ZhengHu DUAN Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Ministry of Education Key Laboratory of Vegetation Ecology Institute of Grassland Science Northeast Normal University

Water is a restrictive factor for plant growth and ecosystem stability in arid and semiarid areas. The dynamics of water availability in soils and water use by plants are consequently critical to ecosystem functions, e.g. maintaining a high resistance to the changing climate. Plant water use strategies, including water-use efficiency （WUE） and the main water source that a plant species utilizes, play an important role in the evaluation of stability and sustainability of a plantation. The water use strategies of desert plants （Tamarix chinensis, Alhagi sparsifolia, Elaeagnus angustifolia, Sophora alopecuroides, Bassia dasyphylla and Nitraria sphaerocarpa） in three different habitats （saline land, sandy land and Gobi） in Dunhuang （located in the typical arid area of northwestern China） were studied. The stable isotope of oxygen was used to determine the main water source and leaf carbon isotope discrimination was used to estimate the long-term WUE of plant species in the summer of 2010. The results suggest that： 1） the studied desert plants took up soil water below the depth of 80 cm; 2） T. chinensis in the three habitats used deeper soil water and T. chinensis in the Gobi site had higher WUE than those in the saline land and the sandy land. The results indicated that desert plants in Dunhuang depended on stable water source and maintained high WUE to survive in water limited environments.

关键词： desert plant stable isotope water source water-use efficiency Dunhuang

Variations of organic carbon isotopic composition and its environmental significance during the last glacial on western Chinese Loess Plateau

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Chinese Science Bulletin 2006年第13期51卷 1593-1602页

作者： CHEN Fahu RAO Zhiguo ZHANG Jiawu JIN Ming ma jianying Center for Arid Environment and Paleoclimate Research (CAEP) Key Laboratory of Western China's Environmental System of Ministry of Education Lanzhou University Lanzhou 730000 China Key Laboratory of marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Graduate School of Chinese Academy of Sciences Beijing 100039 China

A high-resolution loess section in the western Chinese Loess Plateau, Yuanbao Section, was sampled for organic carbon isotopic analyses. The soil organic carbon isotope (δ13Corg) varied be- tween ?22.6‰ and ?27.5‰ during the last glacial at the section. During the last interstadial, the δ 13Corg values were more negative than those in both early and late periods of the last glacial by 4‰. The iso- topic composition indicates a coupled response of the pure C3 plants to the temperature, precipitation and the concentration of atmospheric CO2. Decrease in temperature and the atmospheric CO2 concentration from the last interstadial to Last Glaicial maximum (LGM) caused the organic carbon isotopes to be- come positive by 1.5‰―2.0‰. The amplitude of 4‰ in the δ 13Corg variation during the last glacial should be mainly caused by the precipitation change. Therefore, the δ 13Corg variations of the Yuanbao Section during the last glacial period documented the large-amplitude fluctuation of the monsoon precipita- tion, which is estimated to be 250―310 mm more during the last interstadial than that in the LGM, and 100 mm more than that during early last glacial. The rapid changes of the monsoon precipitation on mil-lennial scale during the last glacial have also been recorded in the isotopic variations in Yuanbao loess section. As the isotopic composition varies compli- catedly as shown in the loess-paleosol sequence, it cannot be simply attributed to the abundances of C3 and C4 plants or be used as an indicator of the summer monsoon variations.

关键词：有机碳同位素成品冰黄土高原华西地区

Active greeting technique: a mother-and-child catheter based technique to facilitate retrograde wire externalization in recanalization of coronary chronic total occlusion

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Science Bulletin 2018年第23期63卷 1565-1569页

作者： Junbo Ge Lei Ge Bin Zhang Xin Zhong jianying ma Leisheng Ru Tao Hu Juying Qian 无 Shanghai Institute of Cardiovascular Diseases Zhongshan HospitalFudan UniversityShanghai 200022China Institutes of Biomedical Sciences.Fudan University Shanghai 200032China Department of Cardiology Guangdong Cardiovascular InstituteGuangdong General Hospital Guangzhou510080China Department of Cardiology Bethune International Peace HospitalShzjiazhuang 050082China Department of Cardiology Xijing HospitalXi'an 710032China Chronic Total Occlusion Club China

Although retrograde approach has greatly improved the success rate of percutaneous coronary intervention(PCI) for coronary chronic total occlusion(CTO), retrograde wire externalization still remains challenging and time-consuming in some cases. Cases utilizing ‘‘Active Greeting Technique(AGT)", a mother-and-child catheter based technique to facilitate retrograde wire externalization, were extracted from Chronic Total Occlusion Club, China(CTOCC) database. AGT was performed by deep intubation a mother-and-child catheter(GuidezillaTMextension, 4 or 5 Fr inner catheter, and etc.) in combination with either reverse controlled antegrade or retrograde subintimal tracking(CART) technique or retrograde wire crossing technique. A total of 111 patients with 112 CTO lesions treated with this technique were retrospectively analyzed. Reverse CART technique and retrograde wire crossing technique were performed in 90.2% and 9.8% of all procedures. The utilization of GuidezillaTMextension, 4 Fr, and 5 Fr inner catheter accounted for 94.6%, 3.6%, and 1.8%, respectively. Externalization of retrograde wire was successful in all cases. No procedural complications were adjudicated to AGT. Complications independent of AGT included two target vessel perforations and two collateral perforations. No in-hospital major adverse cardiac events were found. AGT is a feasible and safe technique that facilitates retrograde wire externalization.

关键词： Percutaneous coronary intervention Chronic total occlusion Retrograde wire externalization Active greeting technique

Global Climate Diplomacy:Origin and Development

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China International Studies 2010年第3期30卷 157-172页

作者： ma jianying PhD candidate at the School for International Relations and Public Affairs FudanUniversity

With the deterioration of global climate in recent years,climate change remains as a hot issue to which the international community pays close attention.2007 could be called the'Year of Climate Change'.In April,the United Nations Security Council held an open debate on climate change and international security for the first time,greatly enhancing the importance of

关键词：全球气候起源气候变化

Inversion of the Volumetric Strain of Aquifer According to the Tidal Effect of Groundwater in North China

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Earthquake Research in China 2014年第4期28卷 520-531页

作者： Yang Liu ma jianying Cao Jingquan Shao Yongxin Liu Wenbing Earthquake Administration of Tianjin Municipality Institute of Geophysics CEA

The change of the confined aquifer level reflects the pore pressure change,and the pore pressure change of the aquifer is closely related to the aquifer pressure. This paper uses the tidal response of the well water level data in the North China region to calculate the tidal factor of each well and extract the effective water trend information. Then,the volumetric strain of an existing confined aquifer well in the North China region is inverted,and the contour maps are plotted on a half-year scale from 2009 to 2012. Results show that it can reflect the state of stress and strain in deep crust to a certain extent in the North China region.

关键词： North China region Water level Tidal factor Volumetric strain

Fault-sand combination modes and hydrocarbon accumulation in Binhai fault nose of Qikou Sag, Bohai Bay Basin, East China

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Petroleum Exploration and Development 2019年第5期46卷 919-934页

作者： ZHOU Lihong HAN Guomeng DONG Yueqi SHI Qianru ma jianying HU Jinnan REN Shichao ZHOU Kejia WANG Jincheng SI Weiliu Dagang Oilfield Company PetroChinaTianjin 300280China

Based on seismic and logging data,taking the downthrow fault nose of Binhai fault in Qikou Sag as the object of study,we analyzed fault characteristics,sand body distribution,fault-sand combinations and hydrocarbon accumulation to reveal the hydrocarbon enrichment law in the fault-rich area of fault depression lake *** results show that the Binhai Cenozoic fault nose is characterized by east-west zoning,the main part of the western fault segment is simple in structure,whereas the broom-shaped faults in the eastern segment are complex in structure,including several groups of *** difference of fault evolution controls the spatial distribution of sand *** sand bodies are in continuous large pieces in the downthrow fault trough belt along the Gangdong Fault in the middle segment of the fault nose,forming consequent fault-sand combination;whereas the fault activity period of the eastern part of the fault nose was later,and the sand bodies controlled by paleogeomorphology are distributed in multi-phase north-south finger-shaped pattern,forming vertical fault-sand combination pattern matching with the *** configuration between faults and sand bodies,and oil sources and caprocks determine the vertical conductivity,plane distribution and vertical distribution of oil and *** oil and gas accumulation modes,*** main fault hydrocarbon supply-fault sand consequent matching-oil accumulation in multi-layers stereoscopically and fault system transportation-fault sand vertical matching-oil accumulation in banded overlapping layers occur in the middle and eastern segments of the fault nose respectively,and they control the difference of oil and gas distribution and enrichment degree in the Binhai fault nose.

关键词： Bohai Bay Basin Qikou Sag Binhai fault nose sandstone development mechanism fault-sand combination oil and gas accumulation reservoir control mechanism

同方期刊数据库

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上海世博会和世博外交

国际问题研究 2010年第6期 24-29页

作者：马建英复旦大学国际关系与公共事务学院

2010年是中国的"世博外交年"。作为公共外交的工具,世博外交独具特色和功能。上海世博会成为中国与世界沟通的桥梁,世界了解中国的窗口,将对中国的发展与进步产生深远的影响。

关键词：世博外交公共外交上海世博会

中国“气候威胁论”的深层悖论--以“内涵能源”概念的导入为例

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世界经济与政治论坛 2009年第3期 1-8页

作者：马建英复旦大学国际关系与公共事务学院国际关系专业博士生 200433

随着全球气候变化问题的凸显,国际气候博弈在全球治理中日渐活跃。一些国家以中国不参与温室气体减排承诺为由,在国际上制造"中国气候威胁论"。导入"内涵能源"概念这一分析变量不难发现,中国是内涵能源和二氧化碳排放的净出口国,中国在... 详细信息

随着全球气候变化问题的凸显,国际气候博弈在全球治理中日渐活跃。一些国家以中国不参与温室气体减排承诺为由,在国际上制造"中国气候威胁论"。导入"内涵能源"概念这一分析变量不难发现,中国是内涵能源和二氧化碳排放的净出口国,中国在存在巨大贸易顺差的同时,却存在着巨大的"生态逆差",所谓的中国气候威胁论存在着深层悖论。为此,中国要在国际层次上积极开展全球气候外交,在国内层次上促进低碳经济发展。

关键词：中国威胁论中国气候威胁论内涵能源国际气候博弈