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The δ^(18)O in the Guliya shallow ice core during the prevailing summer monsoons and sea-air interactions

Journal of Geographical Sciences 2001年第4期11卷 58-68页

作者： ZHANG Xin-ping1,2. Masayoshi Nakawo3, YAO Tan-dong4 (1. Nanjing institute of Geography and Limnology, CAS, Nanjing 2.0008, china {2., hunan normal university, changsha 410081, china 3. institute for Hydro CAS Nanjing Institute of Geography and Limnology Nanjing China (GRID:grid.9227.e) (ISNI:***) hunan normal {2. Institute of Territory and Environment Research Changsha China (GRID:grid.411427.5) (ISNI:***) Nagoya university Institute for Hydrospheric-Atmospheric Sciences Nagoya Japan (GRID:grid.27476.30) (ISNI:***) CAS Cold and Arid Regions Environmental and Engineering Research Institute Lanzhou China (GRID:grid.9227.e) (ISNI:***)

The correlations of the d18Omax in the shallow ice core from the Guliya ice cap on the Tibetan Plateau with the global sea surface temperatures (SST) and height at the 500 hPa over the Northern Hemisphere were analyzed. The correlated regions on oceans that have a significant influence on the d18Omax in the Guliya ice core are all located in ocean currents, or convergent regions of currents. They are the eastern Equatorial Pacific, the Northern Pacific Current, the Hot Pool in the eastern Indian Ocean, the Mozambique Current, the Northern Atlantic Current, the Canary Current and the Atlantic Equatorial Current. The d18Omax in the Guliya ice core has negative correlations with the SST located in the lower latitudes, and positive correlations with the SST in the middle latitudes. The correlated areas at the 500 hPa that have a great impact on the d18Omax are located in the subtropical highs over the mid-low-latitude oceans and the long-wave trough area over Balkhash Lake, where there are marked negative correlations between the heights in those areas and the d18Omax. The influencing mechanism is displayed by the diversity of the vapor origins transported to the Guliya region. The strengths of the European ridge and the ridge over Baikal Lake have notable positive correlations with the d18Omax. The two systems indirectly influence the vapor transportation towards the Guliya region by the adjustment of long-wave trough and ridge.

关键词： the Tibetan Plateau the Guliya ice core δ18Omax SST circulation at 500 hPa correlation

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Study on sustainable development of urban fringe in china

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Journal of Geographical Sciences 2000年第3期10卷 35-44页

作者： Received date: 2.00-06-2. ZHU Xiang, LIU Li (territory research College,{2., changsha 410081, china )

Based on the analyses of characteristics and functions of urban fringe of china, this paper discusses the guidelines and systematic framework for sustainable development of urban fringe, and puts forward relevant inde... 详细信息

关键词： urban fringe sustainable development

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Ecological Footprint and Ecological Security Evaluation in the Upper Min River Basin

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Wuhan university Journal of Natural Sciences 2005年第4期10卷 641-646页

作者： TU Jian-jun 1, 2.1. School of Resources and environment Science, Southwest china {2. university, Chongqing 400715, china 2. institute of Mountain Hazards and environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, china Southwest china normal {2. School of Resources and Environment Science Chongqing China (GRID:grid.263906.8) Chinese Academy of Sciences Institute of Mountain Hazards and Environment Chengdu Sichuan China (GRID:grid.9227.e) (ISNI:***)

On the basis of the ecological footprint (EF) model, this paper studied theecological security in the Upper Min River Basin ecosystem. The result shows that with 2. 038 2.hm^2.er capita ecological capacity (0. 42. 2.hm^2.higher than per capita EF) ,and 165 82. hm^2.ecologysurplus , the ecosystem in Upper Min River is generally secure at present. But the arable land isoverweighed and omens an eco-security crisis. Meanwhile, problems such as low forest coverage rate,severe loss of water and soil,enlargement of arid-valley area, frequent occurrence of mountainhazards and degradation of pastures have been major threats to the eco-security of this region. Thecalculation result of ten-thousand-yuan ( RMB) GDP shows that the use of natural resources isextensive, and there will be a rapid increase tendency of EF in the future. In order to maintain thepresent eco-security, the ways of use natural resources must be improved in the Upper Min RiverBasin.

关键词： ecological security ecological footprint ecological capacity quantitativeevaluation the Upper Min River Basin

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Three industries and wastewater and COD discharge of Beijing

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Journal of environmental Sciences 2000年第4期12卷 474-477页

作者： WANG Yan 1, WANG Hong rui 2. NING Da tong 2.(1. Beijing Municipal research institute of {2.al Protection, Beijing 100037, china 2. institute of {2.al Sciences, Beijing normal university, Beijing 100875, china) 北京市环境保护所北京 1 0 0 0 3 北京师范大学北京 1 0 0 875

With the swift development of economy, the water quality of Beijing is becoming worse day by day and hampers the sustainable development obviously. In this paper, the current conditions of the municipal wastewater structure in the industrial sectors are analysed and discussed in terms of the indicators, such as direct wastewater\|discharge coefficient, complete wastewater\|discharge coefficient, direct discharge coefficient of COD and complete discharge coefficient of COD, by taking a year of 1990s as the base year. Some countermeasures are studied and the corresponding recommendations are put forward in order to improve the water environment in Beijing. This provides a scientific ground for coordinating the relationship between the aquatic environment and economic growth in this city.

关键词： direct wastewater discharge coefficient (DWDC) complete wastewater discharge coefficient (CWDC) direct discharge coefficient of COD(DDC of COD) complete discharge coefficient of COD (CDC of COD)

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Weighted moments for a supercritical branching process in a varying or random environment

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Science china Mathematics 2011年第7期54卷 1437-1444页

作者： LI YingQiu1,2. HU YangLi1,2.& LIU QuanSheng1,3, 1College of Mathematics and Computing Sciences, changsha university of Science and Technology, changsha 410004, china 2.ollege of Mathematics and Computer Sciences, hunan normal university, changsha 410081, china 3LMAM, university of Bretgne-Sud, BP573, 56017 Vannes, France 1. College of Mathematics and Computing Sciences Changsha University of Science and Technology Changsha 410004 China2. College of Mathematics and Computer Sciences Hunan Normal University Changsha 410081 China3. LMAM University of Bretgne-Sud BP573 56017 Vannes France

Let W be the limit of the normalized population size of a supercritical branching process in a varying or random environment. By an elementary method, we find sufficient conditions under which W has finite weighted mo... 详细信息

关键词： branching process varying environment random environment moment martingale

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The New Detection and the Basic Characteristics of the Structural System of Taiwan Region of china—Using the Earth Satellite's Remote-sensing Images to Explain the Structural System of Taiwan Region of china

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Engineering Sciences 2006年第3期 29-36页

作者： Hu Dongsheng~1, Zhang Huajing~2.1.College of Resources environment Science, hunan normal university,{2. 2.College of Chemistry Chemical Engineering, hunan normal university,{2.)

This text uses the regional geological investigation data and the remote sensing image data of earth-satellite remote sensing to synthetically analyze the structural system of Taiwan region of china. Authors detection-marked and assurance-marked and divided 5 kinds of structural system of the Taiwan region: (1) the wreath-shaped structural system, (2. the N-N-E oriented structural system, (3) the S-N oriented structural system, (4) the N-E oriented structural system, (5) the arc-shaped structural system. Combination of the texture faces and associated method were adopted to recover and reconstruct the structural evolution sequences and the formation periods. In this paper, problems such as the development process in geology etc. are also discussed, contributing new information to research the structural field of the East Asia and its tectonic plate movements and structural actions inside the land plate .

关键词： regional geological characteristics basic patterns of structures sequences of the structural evolution geological meaning Taiwan region of china

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Node ordinal encoded genetic algorithm for the optimal allocation of water resources

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Progress in Natural Science:Materials International 2005年第5期15卷 448-452页

作者： YANG Xiaohua1*, YANG Zhifeng 1,2. SHEN Zhenyao1 and LI Jianqiang3(1. State Key Laboratory of Water environment Simulation, School of environment, Beijing {2. university, Beijing 100875, china 2. Key Laboratory for Water and Sediment Sciences Ministry of Education, School of environment, Beijing {2. university, Beijing 100875, china 3. Water Resources and Hydropower Planning and Design General institute, MWR, Beijing 100011, china) State Key Laboratory of Water environment Simulation School of Environment Beijing Normal University Beijing 100875 China Key Laboratory for Water and Sediment Sciences Ministry of Education School of Environment Beijing Normal University Beijing 100875 China Water Resources and Hydropower Planning and Design General institute MWR Beijing 100011 China

A new method, node ordinal encoded genetic algorithm (NOEGA), is proposed for solving water resources optimal allocation problems, in which the capacity of water resources is split into a number of smaller parts so that successive operations can be overlapped. Our objective is to maximize the whole benefit function. To overcome the “dimensionality and algorithm complexity curse” while searching for solutions and looking for an optimal solution, the operations of one-point crossover operator, gene exchange operator, gene random operator, gene shift operator and node ordinal strings are established. It is proved to be an effective optimal method in searching for global solutions. The NOEGA does not need a diversity of initial population, and it does not have the problem of immature convergence. The results of two cases show that using NOEGA to solve the optimal allocation model is very efficient and robust. In addition, the algorithm complexity of NOEGA is discussed.

关键词： water resources optimal allocation node ordinal code genetic algorithm.

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Comparison of temporal and Spatial Characteristics of Ozone Pollution at Ground Level in the Eastern china

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Chinese Journal of Population,Resources and environment 2006年第3期4卷 51-57页

作者： Liu Houfeng1,2.1. Shandong normal university, Jinan 2.0014,{2. 2. Chinese research Academe of environmental Sciences, Beijing 100012.{2. Shandong normal university Jinan 250014 China Chinese research Academe of environmental Sciences Beijing 100012 China

Monitoring data from ozone（O3） automatic stations in three typical cities with different climatic areas in the southern and northern parts of eastern china are used to analyze temporal and spatial characteristics of ozone pollution at ground level. The results show that ozone pollution level has distinct regional differences and the concentration in the suburbs is higher than that in the urban areas. The seasonal variation of ozone concentration in different climatic areas is greatly affected by the variation of precipitation. Ozone concentration in Shenyang and Beijing , in the temperate zone, has one perennial peak concentration, occurring in early summer, May or June. Ozone concentration in Guangzhou, in sub-tropical zone, has two peak values year round. The highest values occur in October and the secondary high value in June. The ozone season in the south is longer than that in the north. The annual average daily peak value of ozone concentrations in different climates usually occur around 3 pm. The diurnal variation range of ozone concentration declines with the increase of latitude. Ozone concentration does not elevate with the increase of traffic flow. Ozone concentration in Guangzhou has a distinct reverse relation to CO and NOx. This complicated non-linearity indicates that the equilibrium of ozone photochemical reaction has regional differences. Exceeding the rate of Beijing＇s lh ozone concentration is higher than that of Guangzhou, whereas the average 8h ozone level is lower than that of Guangzhou, indicating that areas in low latitude are more easily affected by moderate ozone concentrations and longer exposure. Thus, china should work out standards for 8h ozone concentration.

关键词： ozone temporal and spatial characteristics 8h concentrations weekly variation

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Denitrification in Chongming east tidal flat sediment, Yangtze estuary, china

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Science china Earth Sciences 2006年第10期49卷 1090-1097页

作者： WANG Dongqi1,2. CHEN Zhenlou1,3, XU Shiyuan1,2. HU Lingzhen1 & WANG Jun1,2.1. College of Resources & environment, East china {2. university, Shanghai 2.0062. china 2. State Key Laboratory of Estuarine and Coastal Sediment Dynamics and Morphodynamics, East china {2. university, Shanghai 2.0062. china 3. Key Laboratory of Geographical Information Science of Ministry of Education,East china {2. university,Shanghai 2.0062. china 1. College of Resources & environment East China Normal University Shanghai 200062 China 2. State Key Laboratory of Estuarine and Coastal Sediment Dynamics and Morphodynamics East China Normal University Shanghai 200062 China 3. Key Laboratory of Geographical Information Science of Ministry of Education East China Normal University Shanghai 200062 China

From July 2.03 to July 2.04, samples were collected on Chongming Island east tidal flat every two months. The research showed that the nitrous oxide (N2.) production rate was very low in the water, Chongming east tidal flat (CM) sediment was the N2. source of the water. Sediment N2. natural production rate was between -0.08 and 1.74 μmolN·m-2.h-1. N2. natural production rate was higher in the summer. The difference of the N2. natural production rate in the different tidal flats, the correlation between the N2. natural production rate and the denitrification rate, and those with the temperature and DO indicate that middle tidal flat sediment denitrification was the main process of the N2. production, while in the low tidal flat sediment, the production of the N2. came from several processes of the nitrogen cycling. Tidal flat sediment denitrification reaction was stronger in summer and winter but relatively lower in the late autumn and early spring. Seasonal change of the sediment denitrification rate was wide, from 1.12.to 33.34 μmolN·m-2.h-1. Temperature, DO and the coactions of them had the prominent effect on the tidal flat sediment denitrification.

关键词： Yangtze estuary, tidal flat sediment, denitrification, nitrous oxide, effect factor.

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A preliminary knowledge-driven prediction model of snail distribution in the Poyang Lake region

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Chinese Science Bulletin 2008年第1期53卷 115-123页

作者： ZHAO An1,2.3 & BAO ShuMing1 1 The Key Lab of Poyang Lake Ecological environment and Resource Development, Jiangxi normal {2., Nanchang 33002., china 2.institute of Geographic Sciences and Resources research, Chinese Academy of Sciences, Beijing 100101, china 3 School of Geography and environmental Sciences, Jiangxi normal {2., Nanchang 33002., china The Key Lab of Poyang Lake Ecological environment and Resource Development Jiangxi Normal University Nanchang China institute of Geographic Sciences and Resources research Chinese Academy of Sciences Beijing China School of Geography and environmental Sciences Jiangxi Normal University Nanchang China

Present monitoring and prediction of schistosomiasis’s intermediate parasite, snail, are based on re-mote sensing image’s spectral signatures, and the calculation result is in fact an incom-plete-constraints solution. TM image of the Poyang Lake region on October 31, 2.05 was combined with GIS thematic data (DEM, boundary of the Poyang Lake, vegetation, soil and land use) to make a prediction on snail spatial distribution in the region by remote sensing, geo-informatics and knowl-edge-driven modeling according to mechanism of snail occurrence. Result shows that with change of overall fuzzy membership of snail occurrence from high to low, snail occurrence of the snail samples of validation group goes up to 81% within 10% high fuzzy membership range, denoting high efficiency of the model in predicting snail occurrence.

关键词：鄱阳湖区域蜗牛分布模糊分类血吸虫病

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