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Journal of Groundwater Science and Engineering 2024年第2期12卷 147-160页

作者： Stephen Pitchaimani V Narayanan MSS Abishek rs Aswin SK Jerin Joe RJ PG and Research Department of Geology V.O.Chidambaram CollegeThoothukudi 628008India Research Scholar Manonmaniam Sundaranar UniversityTirunelveli 627012India

The primary objective of this research is to delineate potential groundwater recharge zones in the Kadaladi taluk of Ramanathapuram,Tamil Nadu,India,using a combination of remote sensing and Geographic Information Systems(GIS)with the Analytical Hierarchical Process(AHP).Various factors such as geology,geomorphology,soil,drainage,density,lineament density,slope,rainfall were analyzed at a specific *** layers were evaluated for quality and relevance using Saaty's scale,and then inte-grated using the weighted linear combination *** weights assigned to each layer and features were standardized using AHP and the Eigen vector technique,resulting in the final groundwater potential zone *** AHP method was used to normalize the scores following the assignment of weights to each criterion or factor based on Saaty's 9-point ***-wise matrix analysis was utilized to calculate the geometric mean and normalized weight for various *** groundwater recharge potential zone map was created by mathematically overlaying the normalized weighted *** layers indicating major elements influencing groundwater occurrence and recharge were derived from satellite images.2 Results indicate that approximately 21.8 km of the total area exhibits high potential for groundwater *** recharge is viable in areas with moderate slopes,particularly in the central and southeastern regions.

关键词： Groundwater Satellite image Remote sensing GIS techniques Analytical Hierarchy Process(AHP)

Study on the Change of Frozen Soil in Russia （North Asia） Region Based on NOAA Image

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Study on the Change of Frozen Soil in Russia （North Asia） ...

Preface:Upgrading of the Forest Information Technology

2010 International Conference on Remote Sensing (ICrs 2010)

作者： Han Xu Sun Yiquan Chen Ying Feng Zhongke Gong Yinxi beijing Forestry University Institute of GIS rs & gps 10083.beijing ChinaCheng Yanpei CAGS Institute of Hydrogeology and Environmental Geology 050061 Shijiazhuang China

Frozen soil is a widespread kind of soil at high altitudes and high latitudes. It is divided into two parts, permafrost and seasonally frozen soil. It accounts for about 79% of northern hemisphere. As the largest country in the world, the area of Russia frozen soil occupies a large proportion. The use of satellite remote sensing technology has promoted the rapid development of permafrost research since 1970s. In this paper, NOAA remote sensing data preprocessing in Asian part of Russia was done. According to the band characteristics of AVHRR data, split window algorithm was used to calculate surface temperature. Thus, interpreted permafrost and seasonally frozen ground were interpreted, and added up the change of frozen soil area. The conclusion of this research is that permafrost is being degraded to seasonally frozen ground every year. In the end of this paper, the reasons and the hazards were analyzed.

关键词： Russia Frozen soil Split-window algorithms Land surface temperature

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北京林业大学学报 2007年第S2期29卷 305-305页

作者： Professor Feng Zhongke Director of Institute of GIS,rs &gps,beijing Forestry University

Effects of raster resolution on landslide susceptibility mapping:A case study of Shenzhen

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Science China(Technological Sciences) 2008年第S2期51卷 188-198页

作者： TIAN Yuan,XIAO ChenChao,LIU Yu & WU Lun Institute of rs and GIS,Peking University,beijing 100871,China Peking Univ Inst RS & GIS Beijing 100871 Peoples R China

Resolution has been playing a significant role in landslide susceptibility mapping and hazard *** on geographical information system(GIS) and information model,the effects of raster resolution on landslide susceptibility mapping are studied in a central area of Shenzhen,*** factors are selected to calculate landslide susceptibility with eleven groups of different resolutions(5 to 190 m).It has been found that a finer resolution does not necessarily lead to a higher accuracy of landslide susceptibility mappings,while the result of 90 m-resolution has the best accuracy and the 150 m-resolution has the worst *** accuracy curve is in a shape of "W" along with resolution decreasing:1) The accuracy decreases from 5 to 70 m;2) and then the best accuracy appears at 90 m,which is almost the same as the mean size of landslides in study area;3) the accuracy decreases again from 110 to 150 m;4) and finally the accuracy increases from 150 to 190 *** sensitivity analysis indicates that the effects of raster resolution are mainly caused by the resolution impact on landform parameter derivation,while factors like geology and human activity are very insensitive to resolutions.A further study shows that in flat,ridge,and slope foot terrains,the susceptibility mapping result is sensitive to resolution,but in the sloping surface area the sensitivity is much less sensitive to *** last,by choosing study areas with different sizes,it has also been found that the optimal resolutions are variable due to size of study *** the study area is larger than a threshold,which is 135 km2 in this study,and the optimal resolution is almost fixed.

关键词： resolution sensitivity landslide susceptibility mapping digital elevation model(DEM) information model

Integral ear elimination and virtual point-based updating algorithms for constrained Delaunay TIN

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Science China(Technological Sciences) 2008年第S1期51卷 135-144页

作者： WU LiXin1,2,WANG YanBing2,3 & SHI WenZhong2,4 1 Institute for Geo-informatics & Digital Mine Research,Northeastern University,Shenyang 110004,China 2 Institute for GIS/rs/gps & Subsidence Engineering Research,China University of Mining & Technology,beijing 100085,China 3 Laboratory of 3D Information Acquisition & Application,Capital Normal University,beijing 100037,China 4 Center for Advanced GIS Research,LSGI,Polytechnic University Hong Kong,Hong Kong,China Northeastern Univ Inst Geoinformat & Digital Mine Res Shenyang 110004 Peoples R China China Univ Mining & Technol Inst GIS RS GPS & Subsidence Engn Res Beijing 100085 Peoples R China Capital Normal Univ Lab Informat Acquisit & Applicat Beijing 100037 Peoples R China Hong Kong Polytech Univ LSGI Ctr Adv GIS Res Hong Kong Hong Kong Peoples R China

Constrained Delaunay Triangular Irregular Networks (CD-TIN),a kind of special data structure,have many practical applications in Geoinformatics,especially in the representation of linear constrained triangulation for DTM and DSM,such as in digital city and digital mine. Past researches on D-TIN mainly focused on point in-sertion and deletion without consideration of constraint,and that on CD-TIN usu-ally paid more attention to the insertion algorithms for points and edges,but little to the deletion algorithms. The presented algorithms are far insufficient for the dy-namic updating of CD-TIN. In this paper,the constraint edge in CD-TIN is consid-ered to be any set of broken lines,i.e.,polygon edges,broken lines and simple segments. The constraint edge may be composed of one or more constraint seg-ments,and it is allowed to be in any form: Open or close,intersection or self-in-tersection. By improving to present insertion and deletion algorithms for D-TIN,two new algorithms for CD-TIN updating are presented. According to the polymorphism of the constraints in CD-TIN,virtual point is adopted to represent the crossing node between constraint edges when a constraint edge is inserted in CD-TIN. Two new algorithms named as Integral Ear Elimination (IEE) and Influence Domain Retrian-gulation for Virtual Point (IDRVP) are presented,the former is for constraint point deletion,while the later is for the insertion and deletion of constraint edge. The principle of IDRVP is that to divide the influence domain of a virtual point into some parts by the constraint-keeping edges,and to retriangulate each part of the influ-ence domain individually referring to the constraint visible property and constraint empty circle (CEC) criterion. Finally,a prototype system is developed with VC++,one case on the integration of 3D terrain and buildings is demonstrated to test the correctness of new algorithms. It shows that the new algorithms are effective for the updating of CD-TIN.

关键词： Delaunay TIN spatial constraint data updating spatial modeling polymorphism digital mine

Investigating spatial distribution of tourist attractions’inlinks: A case study of three mountains

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Science China(Technological Sciences) 2010年第S1期53卷 126-133页

作者： ZHANG Yi 1,QI LiNa 2,YANG AnRan 1,SHI Lei 1 & XU Li 1 1 Institute of rs and GIS,Peking University,beijing 100871,China 2 Center for Recreation and Tourism Research,Peking University,beijing 100871,China Peking Univ Inst RS & GIS Beijing 100871 Peoples R China Peking Univ Ctr Recreat & Tourism Res Beijing 100871 Peoples R China

In hyperlink analysis,most researchers focus on interpreting hyperlink counts,they seldom concern themselves enough about the significance of spatial distribution of *** this paper,we argue that not only can the inlink count to a tourist attraction’s official website reflect its attractiveness,but also the spatial distribution of its inlinks can reflect the distribution of its tourist source *** mountains in Anhui Province,China,are chosen for the case ***,the correlation between the spatial distributions of an attraction’s tourist source markets and its official website’s inlinks is ***,the tourism indexes such as the spatial concentration index(SCI)and the attraction radius(AR),which are calculated by inlinks,are compared to the real indexes based on tourist ***,the detailed discussion and analysis are presented and an improved model,which is used to calculate the distribution of inlinks,is proposed.

关键词： tourist attractiveness hyperlink analysis spatial distribution of hyperlinks tourist source market

Natural eco-environmental evaluation of eastern Qinghai-Tibet Plateau using rs and GIS

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Journal of Geographical Sciences 2002年第3期12卷 283-288页

作者： YANG Shengtian, LIU Changming, YANG Zhifeng, SUNRui, ZHOU Xiaodong(1. Inst. of Environmental Sciences, beijing Normal University, beijing 100875, China 2. Dept. of Resources and Environmental Science, beijing Normal University, beijing 100875,China) Inst. of Environmental Sciences Beijing Normal University 北京 100875 Dept. of Resources and Environmental Science Beijing Normal University 北京 100875

The impact of interbasin water transfer on environment is very significant. The affected area of the west route scheme of the South to North Water Transfer Project in China (SNWT) is located in the eastern Tibetan Plateau, where the altitude is high with frigid eco-environment. In this article, remote sensing and GIS are applied to analyze the natural environment and the natural environment index is established to express the natural conditions of the study area. After the natural environment index is divided into four grades and the features of each grade are analysed, some results are obtained for reference in environmental assessment of the west route of SNWT.

关键词： Qinghai-Tibet Plateau environmental assessment remote sensing GIS

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用FPGA实现rs-485通信接口芯片

系统工程与电子技术 2002年第4期24卷 103-106页

作者：梁士龙王力男杨嘉伟中国航天科工集团公司二院25所北京100854 信息产业部电子54所河北石家庄050081 中国航天科工集团公司研发中心北京100830

在点对多点主从通信系统中 ,需要合适的接口形式和通信协议实现主站与各从站的信息交换。rs -4 85接口是适合这种需求的一种标准接口形式。当选择主从多点同步通信方式时 ,工作过程与帧格式符合HDLC/SDLC协议。介绍了采用VHDL语言在FPG... 详细信息

在点对多点主从通信系统中 ,需要合适的接口形式和通信协议实现主站与各从站的信息交换。rs -4 85接口是适合这种需求的一种标准接口形式。当选择主从多点同步通信方式时 ,工作过程与帧格式符合HDLC/SDLC协议。介绍了采用VHDL语言在FPGA上实现的以HDLC/SDLC协议控制为基础的rs - 4 85通信接口芯片。实验表明 ,这种接口芯片操作简单、体积小、功耗低、可靠性高 ,极具实用价值。

关键词： FPGA rs-485通信接口芯片通信系统标准接口芯片

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图谱嵌入传播的推荐方法

计算机应用 2024年第10期44卷 3252-3259页

作者：周北京王海荣王怡梦张丽丝马赫北方民族大学计算科学与工程学院银川750021 图像图形智能处理国家民委重点实验室(北方民族大学) 银川750021

根据知识图谱(KG)丰富用户和项目信息的侧重不同,现有的图谱嵌入传播的推荐方法可归纳为用户嵌入传播、项目嵌入传播和混合嵌入传播这3类。用户嵌入传播方法侧重使用用户交互的项目和KG学习用户表示;项目嵌入传播方法使用KG中的实体表... 详细信息

根据知识图谱(KG)丰富用户和项目信息的侧重不同,现有的图谱嵌入传播的推荐方法可归纳为用户嵌入传播、项目嵌入传播和混合嵌入传播这3类。用户嵌入传播方法侧重使用用户交互的项目和KG学习用户表示;项目嵌入传播方法使用KG中的实体表征项目;而混合嵌入传播方法融合了用户-项目交互信息和KG,以弥补前两类方法存在的信息利用不充分的不足。为深入对比3类方法的技术特点,重点剖析图谱嵌入传播的推荐方法中的图谱构建、嵌入传播和预测这3个核心任务的关键技术;同时,在MovieLens、Booking-Crossing和***通用数据集上复现每类方法中的主流模型,通过使用点击率(CTR)指标对比分析上述方法的效果。分析实验结果可知,混合嵌入传播方法的推荐性能最优,它综合了用户和项目嵌入传播方法的优势,利用交互信息和KG增强用户和项目表示;此外,对比分析每类方法,阐述各自的优缺点并展望未来的研究工作。

关键词：推荐系统知识图谱协同过滤嵌入传播图神经网络

Ab Initio Study on the Reaction of La￣+ + CH_4→La+-CH￣2 + H_2

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Chinese Chemical Letters 1996年第11期7卷 1043-1046页

作者： Zhu, rs Dai, SS YUNNAN UNIV DEPT CHEMKUNMING 650091PEOPLES R CHINA

Ab initio study on the reaction or the ground state (a3F) and excited state (a1D) or La+with methane has been Performed. performed. channel on the singlet and triplet potential energysurface (PES) has been examined and the reaction mechanism are discussed. Comparisons betweensinglet and triplet PESs show that the ex￣ state (aiD) of La+ is more r￣ than its groundstate (a3F) due tO the SPin quantum number conservation with the more stable insertion intermediate for excited state (1D), which is in good agreement with the experiment.

关键词： CH~2 Ab Initio Study on the Reaction of La H2