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An equal area conversion model for rasterization of vector polygons

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Science china Earth Sciences 2007年第S1期 169-175页

作者： ZHOU ChengHu1, OU Yang 1, YANG Liao2.& QIN Biao3 1 State key laboratory of {2. and environmental information System, Institute of Geographic Sciences, and Natural Re-sources Research, Chinese Academy of Sciences, Beijing 100101, china 2.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, ürümqi 830011, china 3 Mathematics Department of Xi’an Transportation university, Xi’an 710009, china

Vector-raster conversion is one of the classic research topics in the field of Geographical information Systems (GIS). The algorithms commonly used in GIS are devoted to maintaining the vector polygons' shape characteristics, but neglect the gain and loss of a polygon's area, which is another important attribute. This paper proposes an equal-area conversion model based on an area compensation optimization principle. According to the topological relationship among polygons and boundary grids, a neighborhood compensation principle was adopted to assign the attributes of boundary grids and a global optimization algorithm was developed to minimize area distortion in the whole data set. Two experiments were designed and the results indicated that this algorithm not only guaranteed the area error is as small as possible, but also has the advantage as being adaptive to polygon shape and spatial structure.

关键词： vector polygon vector-raster conversion boundary grid area distortion boundary geometric characteristics

Application of Grey Relation Analysis in Evaluation of Water Quality

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Application of Grey Relation Analysis in Evaluation of Water...

2.09 International Conference on environmental Science and information Application Technology

作者： Changjun Zhu College of Urban Construction Hebei university of engineering Handan 056038 {2. Zhenchun Hao State key laboratory of Hydrology-Water resources and Hydraulic engineering Hohai university Nanjing 2.0098 {2.

In view of the deficiency of classic method evaluating water quality.A grey relational analysis model is proposed to evaluate water quality in *** principle of grey relational analysis and its process are *** river was selected and assessed by using this *** it was found that,compared with the fuzzy complex judgment method,the result was remarkably *** possible reason for this was ***,this paper proposes preventive measures against river contamination,which could provide a basis for marine environment protection.

关键词： grey relational analysis water quality assessment fuzzy complex judgment method

Research Advances on the Loess-Bedrock Landslide in china

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Research Advances on the Loess-Bedrock Landslide in China

2.12.Asia Pacific Conference on environmental Science and Technology(APEST 2.12.

作者： Chengyi Fan1 a Shouyun Liang1 b and Xiangxian Ma2.c 1 key laboratory of Mechanics on Disaster and Environment in Western{2. the Ministry of Education of{2. and Department of Geological engineering College of Civil engineering and Mechanics Lanzhou university Lanzhou 730000 P.R.china 2.key laboratory of Petroleum resources Research Institute of Geology and Geophysics Chinese Academy of Sciences Lanzhou 730000 P.R.china

Loess landslide is one of the serious geological disasters in and around the loess plateau in northwest of *** the major type of loess landslide in this area,loess-bedrock landslide widely distributes,frequently occurs,and causes serious casualties and property *** the formation mechanism and protection countermeasures arousing increasingly,the scientists have paid close attention and got a series of research *** is very important of systematic summary and thorough analysis of the loess-bedrock landslide for reducing disasters caused by loess *** acquired achievements of the loess-bedrock landslide have been summarized on classification,formation mechanism,influencing factors and hazard range,and some main fields are put forward for further researching:（1） to explore the control action and boundary effect of paleo-weathering crust upon the top of bedrock for the loess-bedrock landslide;（2. to research the influence of the orientation and the top fluctuant configuration of bedrock and the slope structure on loess landslide;（3） to study the relationship between the landslide formation and the slope profile structure,the physical,hydrological and mechanical properties of the rock-soil mass;（4） to research the critical value of locked segment in the loess-bedrock cutting layer landslide;（5） to analyze the main influencing factors and forecast the hazard range of different types of the loess-bedrock landslide.

关键词： Loess-bedrock landslide Landslide classification Formation mechanism Hazard range Research advances.

environmental Geochemistry of mining Activities in Panzhihua Region, Southwestern{2.

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Journal of china university of Geosciences 2001年第4期12卷 296-300页

作者： Teng Yanguo Institute of environmental Sciences, State key {2. of Water environmental Simulation, Beijing Normal university, Beijing 100875 Tuo Xianguo Department of Nuclear resources and Technology, Chengdu university of Technology, Chengdu 610059 Faculty of Earth Sciences and Mineral resources China University of Geosciences Beijing 100083 Ni Shijun Zhang Chengjiang Ma YuxiaoDepartment of Nuclear Resources and Technology Chengdu University of Technology Chengdu 610059 Department of Nuclear resources and Technology Chengdu University of Technology Chengdu 610059 Faculty of Earth Sciences and Mineral resources China University of Geosciences Beijing 100083 Department of Nuclear resources and Technology Chengdu University of Technology Chengdu 610059

mining activities have created huge uncovered slopes, large areas of gangue ground and extensive tailings dams. This paper presents the environmental geochemistry of mining activities in Panzhihua region. The selected elements (Ti, V, Mo. Ni. Pb. Cu) show similar distribution patterns of concentration anomaly in topsoil. These concentration anomalies are located in V-Ti-magnetite slope, gangues dam and coal mine. The distinction between anthropogenic contamination and natural background is made available by the use of the enrichment factor in this study area. The anomalies of EF were smaller than that of concentration. The results from EF show that the selected elements anthropogenic pollution (EF>1) in topsoil were located in both the coal mining area and the V-Ti-magnetite mining area. In addition, the pollution sources of selected elements came from V-Ti-magnetite, slag, gangues, coal and other pollutants from mining activities.

关键词： environmental geochemistry mining activity Panzhihua region Southwestern china.

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热作为油运移动力的物理模拟实验

石油与天然气地质 2003年第3期24卷 210-214页

作者：邱楠生方家虎石油大学石油天然气成藏机理教育部重点实验室北京102249 中国矿业大学资源系北京100083

针对不同物性输导体、不同供油条件、不同温度差作用下油的运移情况进行了 5组模拟实验。结果表明在温度差作用下油流体可以发生运移 ,证实热 (温度 )在一定条件下可以作为流体运移的直接动力。在实验条件下 ,温度差 (热 )是决定油运移... 详细信息

针对不同物性输导体、不同供油条件、不同温度差作用下油的运移情况进行了 5组模拟实验。结果表明在温度差作用下油流体可以发生运移 ,证实热 (温度 )在一定条件下可以作为流体运移的直接动力。在实验条件下 ,温度差 (热 )是决定油运移进行与否、运移速度、运移距离大小的最主要因素。在其他条件相同的情况下 ,温差越大 ,运移距离越长 ;干砂中比湿砂中运移距离长 ;两端加热比一端加热运移距离长 ;一端开放更有利于油运移 ;不断补给供油量并不能使运移距离增大 ;储层物性并不影响油运移距离。

关键词：热/温度差运移动力模拟实验

Surface Water resources' Response to Climate Changes in Jilin Province

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Meteorological and environmental Research 2011年第7期2卷 53-56,65页

作者： CAI Zhe1,2.TAN Gui-rong2.SUN Li3,QU Jing-hua3 1.Jinan Meteorological Bureau,Jinan 2.0002.china 2.key {2. of Meteorological Disaster of Ministry of Education,Nanjing university of information Science & engineering,Nanjing 2.0044,china 3.Jilin Meteorological Scientific Research Institute,Changchun 130062.china

[Objective] The response of surface water resources on climate changes was studied.[Method] By dint of monthly average temperature and precipitation in 45 meteorological stations in Jilin Province from 1960 to 2.00,monthly runoff in 56 hydrological stations in Songhuajiang and Liaohe region,the surface runoff change and the response of surface water resources to climate change in 41 years were expounded.[Result] The runoff of Songliao region was limited during 1960s and *** began to increase slowly in the early *** 1990s,there were distinct fluctuation of annual runoff and it was decreasing in *** analysis suggested that the runoff of Songliao region was decreasing gradually from south to the *** central gradient was small and runoff was evenly *** test result showed that the annual runoff in Songliao region had large fluctuation before 1980s and after *** response of surface runoff on climate and precipitation changes in Jilin Province was distinct and had strong relevance as well as certain *** on the analysis of the relation of rivers runoff and meteorological elements changes,statistics forecast model between river surface runoff and meteorological elements was *** prediction value and measured value had good *** corresponding river surface runoff changes can be assessed based on the changes of meteorological elements.[Conclusion] The study provided theoretical basis for the development and utilization of surface water resources in Jilin.

关键词： Surface water resources Climate changes Response Jilin china

世博园白莲泾河道综合调水决策系统的设计与应用

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水电能源科学 2010年第9期28卷 131-133页

作者：戚晓明汪迎春杜培军中国矿业大学地理信息与遥感科学系江苏徐州221116 蚌埠学院计算机科学与技术系安徽蚌埠233000 河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098

以.NET为软件开发平台,采用Google Earth GE API和MapX 5.0控件,结合世博园白莲泾河道综合调水需求,在分析调水系统的设计目标、框架及主要功能的基础上,开发实现了调水解决方案管理、数据库管理、GE环境、GIS环境下水质与水位动态演示... 详细信息

以.NET为软件开发平台,采用Google Earth GE API和MapX 5.0控件,结合世博园白莲泾河道综合调水需求,在分析调水系统的设计目标、框架及主要功能的基础上,开发实现了调水解决方案管理、数据库管理、GE环境、GIS环境下水质与水位动态演示等模块。模拟试验结果表明,该系统模拟精度较高,可视化效果较好,达到了系统的预定目标,有利于世博园的河道水质保障要求。

关键词：世博园白莲河道水质综合调水决策系统设计与应用 Application System Design Decision Making Integrated Transfer 软件开发平台数据库管理可视化效果主要功能预定目标试验结果设计目标模拟精度环境

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基于模糊决策和层次分析法的采矿方法选择

武汉理工大学学报 2009年第8期31卷 145-148,153页

作者：叶海旺常剑武汉理工大学资源与环境工程学院矿物资源加工与环境湖北省重点实验室武汉430070

以内蒙古某萤石矿为例,利用模糊数学理论和层次分析法来建立采矿方法优选模型,首先从众多影响采矿方法选择的因素中选取9个较为重要的因素,再利用层次分析法确定各因素的权重,最后采用模糊决策评选出最为合适的采矿方法。结果表明,采用... 详细信息

以内蒙古某萤石矿为例,利用模糊数学理论和层次分析法来建立采矿方法优选模型,首先从众多影响采矿方法选择的因素中选取9个较为重要的因素,再利用层次分析法确定各因素的权重,最后采用模糊决策评选出最为合适的采矿方法。结果表明,采用该模式选取的采矿方法具有一定的科学性和合理性,值得推广应用。

关键词：采矿方法模糊决策层次分析法权重

Discussion of Present Isotopic Hydrograph Separation （IHS） Method

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Discussion of Present Isotopic Hydrograph Separation （IHS）...

2.09 International Conference on environmental Science and information Application Technology

作者： Weimin Bao State key laboratory of Hydrology-Water {2. and Hydraulic engineering Hohai university Nanjing P.R.china Tao Wang Haiying Hu Simin Qu State key laboratory of Hydrology-Water {2. and Hydraulic engineering Hohai university Nanjing P.R.china

Runoff sources and dominant flow paths are still poorly understood in most ***,isotope hydrograph separation methods are widely used to improve our understanding about runoff *** hydrograph separation（IHS）is based on the mass balance equation of water flux and isotope tracer *** isotope analysis machine（for example,mass spectrum） available can only get theδ-value of the isotope *** analysis is presented for quantifying the error in two-and three-component tracer-based hydrograph *** analysis compared the error between ratio balance method and mass balance method in computing mixed fractions to determine which method is more *** the ratio balance method,the ratio of isotope tracer in used in concentration mass balance equation;comparatively,in the mass balance method,the concentration of isotope tracer is used in the same *** studies about two-and three-component tracer-based hydrograph separation are used to illustrate the application of the *** of the abundance of rare isotopes are so negligible,the difference between two methods is small in the isotopic hydrograph separation *** scientific research,it is not appropriate to substitute ratio for concentration in the isotope tracer concentration mass balance ***,we recommend the use of mass balance method in the application of isotope hydrograph separation research to improve the degree of accuracy.

关键词： isotope hydrograph separation(IHS) two component three component ratio balance method mass balance method