检索结果-南通市图书馆

Prediction of petroleum exploration risk and subterranean spatial distribution of hydrocarbon accumulations

Petroleum Science 2011年第1期8卷 17-23页

作者： Xie Hongbing Guo Qiulin Li Feng Li Jianzhong Wu Na Hu Suyun Liang Kun school of Energy Resources China University of GeosciencesBeijing 100083China Research Institute of Petroleum Exploration ＆ Development PetroChinaBeijing 100083China Science ＆ Technology Management Department China National Petroleum CorporationBeijing 100007China

Investigation of spatial distribution of oil and gas resource and accurate prediction of the geographic location of its undiscovered resource is significant for reducing exploration risk and improving exploration benefit.A new method for predicting spatial distribution of oil resource is discussed in this *** consists of prediction of risk probability in petroleum exploration and simulation of hydrocarbon abundance. Exploration risk probability is predicted by multivariate statistics,fuzzy mathematics and information processing techniques.A spatial attribute database for sample wells was set up and the Mahalanobis distance and Fuzzy value of given samples were ***,the Bayesian formula was used to calculate the hydrocarbon-bearing probability at the area of exploration ***,a hydrocarbon probability template is formed and used to forecast the probability of the unknown area. The hydrocarbon abundance is simulated based on Fourier integrals,frequency spectrum synthesis and fractal ***,the fast Fourier transformation（FFT） is used to transform the known hydrocarbon abundance from the spatial domain to the frequency domain,then,frequency spectrum synthesis is used to produce the fractal frequency spectrum,and FFT is applied to get the phase information of hydrocarbon-bearing ***,the frequency spectrum simulation is used to calculate the renewed hydrocarbon abundance in the play. This method is used to predict the abundance and possible locations of the undiscovered petroleum accumulations in the Nanpu Sag of the Bohai Bay Basin,*** prediction results for the well-explored onshore area of the northern Nanpu Sag agree well with the actual *** the less-explored offshore areas in the southern Nanpu Sag,the prediction results suggest high hydrocarbon abundance in Nanpu-1 and Nanpu-2.providing a useful guiding for future exploration.

关键词： Hydrocarbon resources abundance risk forecast Nanpu sag frequency spectrum simulation fractal theory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sandstorms and desertification

引用

Journal of geographical sciences 2000年第3期10卷 99-102页

作者： CHEN Zhi-qing1, ZHU Zhen-da2.(1.Institute of geographic sciences and Natural Resources Research, Chinese Academy of sciences, Beijing 100101, china 2. Institute of Dsert Research, Chinese Academy of sciences, Beijing 100101, china)

Sandstorm is a frequently occurred disastrous weather in northern china. The increasing occurrence frequency recently, especially the much more frequently occurred sandstorms with high intensity in the spring of 2.00 have caused great loss to national economy. The combination of strong wind, exposed sandy soil on ground surface and unstable air current constitutes the necessary conditions for the sandstorms. However, the accelerated desertification process resulting from irrational human economic activities is responsible for the accelerated sandstorms. The effective measures to mitigate sandstorm lie in strengthening desertification control and eco-environmental protection.

关键词： sandstorm generating conditions desertification eco-environmental protection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spatial Organization Mechanism of Aircraft Manufacturing

引用

Chinese Journal of Population,Resources and Environment 2010年第1期8卷 62-70页

作者： Dong Yan1,2.Chu Bo1,3.1.Institute of geographic sciences and Natural Resources Research,CAS,Beijing 100101,{2. 2.Graduate University of Chinese Academy of sciences,Beijing 100049,{2. 3.Fujian Provincial Department of Foreign Trade and Economic Cooperation,Fuzhou Fujian 3.0003.{2. Institute of geographic sciences and Natural Resources Research CAS Beijing 100101 China Graduate University of Chinese Academy of sciences Beijing 100049 China Fujian Provincial Department of Foreign Trade and Economic Cooperation Fuzhou Fujian 350003 China

Unquestionably,aircraft industry plays an important part in both economy and security of a ***,few of articles have dealt with the spatial development of this industry *** purpose of this article is to analyze the dynamics of agglomeration and diffusion of aircraft *** a historical view,with some spatial analysis methods,this research discusses the characteristics and patterns of aircraft industry's spatial organization and evolution,globally,nationally and regionally *** find out there is a ‘Matthew effect' in aircraft industry of the world,and the spatial evolution of the industry is consistent with the nation's industrialization ***,it concludes that the main agglomeration forces consist of capital,talents,technology and cluster's advantages,and the main diffusion forces include comparative advantages,cost and risk sharing,emerging markets,development policy for backward regions and military *** the factors can be divided into market forces making the spatial development of aircraft industry normal and non-market forces making that *** particular,lessons from the USA and France are expected to be conducive to the rise of china's aircraft industry in the future.

关键词： aircraft manufacturing diffusion agglomeration spatial evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

SEDIMENT YIELD MODELING FOR SINGLE STORM EVENTS BASED ON HEAVY-DISCHARGE STAGE CHARACTERIZED BY STABLE SEDIMENT CONCENTRATION

引用

International Journal of Sediment Research 2007年第3期22卷 208-217页

作者： Mingguo ZHENG1, Qiangguo CAI2. and Qinjuan CHENG3.1Assistant professor, Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of geographic sciences & Natural Resources Research, CAS, Beijing 100101,{2.. 2.Professor, Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of geographic sciences & Natural Resources Research, CAS, Beijing 100101,{2.. 3.Doctoral candidate, Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of geographic sciences & Natural Resources Research, CAS, Beijing 100101,{2.. Graduate school of the Chinese Academy of sciences, Beijing 10003., {2.. Chinese Acad Sci Inst Geog Sci & Nat Resources Res Key Lab Water Cycle & Related Land Surface Proc Beijing 100101 Peoples R China

The relation between runoff volume and sediment yield for individual events in a given watershed receives little attention compared to the relation between water discharge and sediment yield, though it may underlie the event-based sediment-yield model for large-size watershed. The data observed at 12.experimental subwatersheds in the Dalihe river watershed in hilly areas of Loess Plateau, North china, was selected to develop and validate the relation. The peak flow is often considered as an important factor affecting event sediment yield. However, in the study areas, sediment concentration remains relatively constant when water discharge exceeds a certain critical value, implying that the heavier flow is not accompanied with the higher sediment transport capacity. Hence, only the runoff volume factor was considered in the sediment-yield model. As both the total sediment and runoff discharge were largely produced during the heavy-discharge stage, and the sediment concentration was negligibly variable during this stage, a proportional function can be used to model the relation between event runoff volume and sediment yield for a given subwatershed. The applicability of this model at larger spatial scales was also discussed, and it was found that for the Yaoxinzhuang station at the Puhe River basin, which controls a drainage area of 2.64km2. a directly proportional relation between event runoff volume and sediment yield may also exist.

关键词： Sediment yield Peak flow Flow-sediment relation Loess Plateau

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Positioning localities from spatial assertions based on Voronoi neighboring

引用

Science china(Technological sciences) 2010年第S1期53卷 143-149页

作者： GONG YongXi 1,2.3.LI GuiCai 1,LIU Yu 2.& YANG Jian 1 1 Shenzhen Key Lab of Recycling Economy,Peking University Shenzhen Graduate school,Shenzhen 518055,{3. 2.nstitute of Remote Sensing and {2.al Information Systems,Peking University,Beijing 100871,{3. 3.ollege of Urban and Environmental Science,Peking University,Beijing 100871,{3. Peking Univ Shenzhen Grad Sch Shenzhen Key Lab Recycling Econ Shenzhen 518055 Peoples R China Peking Univ Inst Remote Sensing & Geog Informat Syst Beijing 100871 Peoples R China Peking Univ Coll Urban & Environm Sci Beijing 100871 Peoples R China

With the rapid development of Internet,much spatial information contained in non-structured or semi-structured documents is available on the World Wide *** such documents,localities are always textually described using spatial relationships and named places,instead of numerical ***,extracting positional information from locality descriptions is an important *** this paper,we bridge two aspects of locality descriptions,namely generating locality descriptions and positioning localities,and provide a method to compute probability density according to the selection probability of a reference object to describe the position of the target *** operation on uncertainty field is used to deal with locality description involving multiple reference *** metrics are introduced to measure the results of positioning *** choose the mixed selection probability function based on Euclidean distance and Voronoi stolen-area to compute probability density ***,we use three cases to demonstrate the proposed methods.

关键词： geographic information science positioning locality Voronoi neighboring probability density function

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modeling of Hillslope Runoff and Soil Erosion at Rainfall Events Using Cellular Automata Approach

引用

Pedosphere 2009年第6期19卷 711-718页

作者： MA Ting ZHOU Cheng-Hu CAI Qiang-Guo State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 (China) Graduate University of the Chinese Academy of sciences Beijing 100049 (China)

A novel quantitative cellular automata (CA) model that simulates and predicts hillslope runoff and soil erosion caused by rainfall events was developed by integrating the local interaction rules and the hillslope surface hydraulic processes. In this CA model, the hillslope surface was subdivided into a series of discrete spatial cells with the same geometric features. At each time step, water and sediment were transported between two adjacent spatial cells. The flow direction was determined by a combination of water surface slope and stochastic assignment. The amounts of interchanged water and sediment were computed using the Chezy-Manning formula and the empirical sediment transport equation. The water and sediment discharged from the open boundary cells were considered as the runoff and the sediment yields over the entire hillslope surface. Two hillslope soil erosion experiments under simulated rainfall events were carried out. Cumulative runoff and sediment yields were measured, respectively. Then, the CA model was applied to simulate the water and soil erosion for these two experiments. Analysis of simulation results indicated that the size of the spatial cell, hydraulic parameters, and the setting of time step and iteration times had a large impact on the model accuracy. The comparison of the simulated and measured data suggested that the CA model was an applicable alternate for simulating the hillslope water flow and soil erosion.

关键词： hillslope surface hydraulic parameters sediment simulation water

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimal land use allocation of urban fringe in Guangzhou

引用

Journal of geographical sciences 2012年第1期22卷 179-191页

作者： GONG Jianzhou LIU Yansui CHEN Wenli Institute of geographic sciences and Natural Resources Research CAS school of geographical {2. Guangzhou University Guangdong Party Institute of CCP Guangdong Administration Institute

In response to the strong drive for social and economic development, local governments have implemented urban master plans, providing measures and timeframes to address the continuous demand for land and to alleviate urban problems. In this paper, a multi-objective model was constructed to discuss the problem, including economic benefits and ecological effectiveness, in terms of land use optimization. A genetic algorithm was then adopted to solve the model, and a performance evaluation and sensitivity analysis were conducted using Pareto optimality. Results showed that a set of tradeoffs could be acquired by the allocation of land use. In addition, the Pareto solutions proved the model to be efficient; for example, a limit of 13.500 ha of urban area conformed to plan recommendations. The reduction in crop land, orchard land, grassland, and unused land provided further efficiencies. These results implied that further potential regional land resources remain and that the urban master plan is able to support sustainable local development in the years to come, as well as verified that it is feasible to use land use allocation multi-objective modeling and genetic algorithms.

关键词： optimal allocation land use multi-objective modeling genetic algorithms fringe area

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of soil erosion and sediment delivery ratio using remote sensing and GIS:a case study of upstream Chaobaihe River catchment, north china

引用

International Journal of Sediment Research 2008年第2期23卷 167-173页

作者： Weifeng ZHOU1 and Bingfang WU2.1 Doctor candidate,Graduate school of the Chinese Academy of sciences(CAS),Beijing 10003.,{2. 2.Prof.,Institute of Remote Sensing Applications,Chinese Academy of sciences(CAS),Beijing 100101,{2. [a]Doctor candidate Graduate school of the Chinese Academy of sciences(CAS) Beijing 10003. china [b]Prof. Institute of Remote Sensing Applications Chinese Academy of sciences(CAS) Beijing 100101 china

Soil erosion in catchment areas reduces soil productivity and causes a loss of reservoir *** parametric models have been developed to predict soil erosion at drainage basins,hill slopes and field *** well-known Universal Soil Loss Equation(USLE) represents a standardized *** reservoir,which sits on Chaobaihe River,is the main surface source of drinking water for Beijing,the capital of *** and soil loss are the main reasons for sediment to enter a *** yield is assessed using a version of the universal soil loss equation modified by Chinese *** year 2.01 and 2.02.data for factors in the equation are obtained from remote sensing or collected to form an analysis *** factors are computed and mapped using {3. Information System *** on the complex database,the modified model is *** pixel-based computing the sediment yield per hydrological unit is *** model does not consider sediment deposition occurring on *** soil loss is often higher than the sum of those measured at catchment *** sediment delivery ratio(SDR) per hydrological unit is also *** study analyzes the main contributions of sediment yields on sub-basins of the Chaobaihe River to the Miyun Reservoir,and discusses the possible reasons for the difference between SDRs in 2.01 and 2.02.at different *** result shows that in the upper basin of the Miyun Reservoir,in 2.01 the area of erosion that could be neglected was 8,2.2.76 km2.the area of low erosion 3.2.9.59 km2.the area of moderate erosion 3.400.97 km2.the area of high erosion 43..89 km2.the area of strong erosion 52.19 km2.and the area of severe erosion 3.13.*** highest soil loss was 70,3.3.t/*** in Fengning County in 2.01,followed by 64,418 t/*** by Chicheng County in *** SDR in 2.02.was lower than that in *** main reasons are the decreasing rainfall erosivity and total runoff.

关键词： Modified USLE Gross erosion Sediment delivery ratio

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A NEW IMPLICIT SCHEME FOR SOLVING 3.D SHALLOW WATER FLOWS

引用

Journal of Hydrodynamics 2009年第6期21卷 790-798页

作者： ZHANG Zhuo SONG Zhi-yao LV Guo-nian State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering Ocean College Hohai University Nanjing 210098 China Key Laboratory of Virtual geographic Environment Ministry of Education Nanjing Normal University Nanjing 210097 China

Based on the improved ADI method, this article proposes an improved implicit finite difference scheme for solving 3.D shallow water flows. The main objective is to design a numerical relation between the horizontal velocity on each layer and the depth-averaged velocity for employing the improved ADI method. With the free surface elevation and the depth-averaged velocity obtained by using essentially 2.D depth-averaged mode, the velocity profiles can be obtained easily and simultaneously. The wind-induced flows, the open channel flows due to the pressure gradient and the tidal flows in coastal waters are simulated, and the results are consistent well with the analytical solution and the field data, which shows that the present implicit scheme is stable and effective, and the established model is practical. Moreover, when only one vertical layer is specified, the present 3.D numerical model is reducea to the 2.D depth-averaged model.

关键词： shallow water equation ADI method wind-induced flow gravity-drived flow tidal flow

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sandy desertification trend in western Northeast china Plain in the past 10 years

引用

Journal of geographical sciences 2001年第2期11卷 179-186页

作者： LI Bao-lin~1,2. ZHOU Cheng-hu~1 (1. LREIS, Institute of geographic sciences and Natural Resources Research, CAS, Beijing 100101, {2. 2. Institute of Remote Sensing Application, CAS, Beijing 100101, {2.) Institute of Remote Sensing Application CAS LREIS Institute of Geographic Sciences and Natural Resources Research CAS LREIS Institute of Geographic Sciences and Natural Resources Research CAS

The west sandy land of the Northeast china Plain is located in the eastern huge sandy belt of mid-latitude in Eurasia and the eastern fringe of desertified land with best bio-climatic conditions in china. With rapid economic development, the deterioration of eco-environment has occurred and the desertification becomes very obvious. The first part of this paper studies the regional differences of landscape patterns and explores the regional differences of desertification. The second part aims to reveal the dynamics of desertification in the 1990s by using NOAA/AVHRR data and thematic data in GIS database. This work lays a scientific basis for the rehabilitation and development of the sandy lands.

关键词： west sandy land in Northeast china Plain landscape pattern regional difference remote sensing monitoring dynamic change

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：