共查询到19条相似文献,搜索用时 187 毫秒
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地质环境评价中,地理信息系统和空间数据挖掘的某些单一模型得到广泛应用.通过分析地理信息系统和空间数据挖掘在地质环境评价中的应用现状,指出其存在的问题,结合地质环境评价特点,提出将地理信息系统与空间数据挖掘集成用于地质环境评价,构建基于地理信息系统与空间数据挖掘的地质环境评价体系.在此基础上设计出地质环境评价过程.实践表明,GIS与SDM结合是地质环境评价工作的有效解决方案,集成GIS与SDM,共享同一用户界面的地质环境评价系统是地质环境评价研究的发展方向. 相似文献
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金属矿产资源评价分析系统设计 总被引:23,自引:2,他引:21
介绍了金属矿产资源评价分析系统的总体设计目标及由各种原始数据库为内容的事务处理层和以数据仓库、联机分析处理和数据挖掘为核心的分析应用层两部分所组成的系统总体结构。进而介绍了系统的数据仓库设计、专用型空间分析方法模型的功能以及系统的应用前景。 相似文献
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从数据挖掘的产生出发,到发展的各个分支,讨论了各种数据挖掘方法的特点和应用对象。介绍典型的算法、它们的优化改进和变形,并分析数据挖掘技术将来面临的问题及发展方向。 相似文献
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面向野外地质填图的空间实体对象表达 总被引:2,自引:6,他引:2
开展以计算机技术为核心的辅助地质填图野外数据采集,必须以野外地质空间实体数据的采集为主线研制地质填图野外数据采集系统,运用软件工程学和系统工程学的方法,把面向对象软件工程开发技术与实际野外地质填图流程相结合运用到系统开发的各个环节,研究面向野外地质填图空间实体的分析方法和面向野外空间实体的数据对象的分析模型,建立了野外地质空间实体E-C-R模型,类层次结构及信息结构模型,为系统实现及系统集成提供了可行的技术开发路线。 相似文献
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For applications of data mining techniques in geosciences, through mining spatial databases which are constructed with geophysical
and geochemical data measured in fields, critical knowledge, such as the spatial distribution of geological targets, the geophysical
and geochemical characteristics of geological targets, the differentiation among the geological targets, and the relationship
among geophysical and geochemical data, can be discovered. Due to the complexity of geophysical and geochemical data, traditional
mining methods of cluster analysis and association analysis have limitations in processing complex data. In this paper, a
clustering algorithm based on density and adaptive density-reachable is presented which has the ability to handle clusters
of arbitrary shapes, sizes, and densities. For association analysis, mining the continuous attributes may reveal useful and
interesting insights about the data objects in geoscientific applications. An approach for distance-based quantitative association
analysis is presented in this paper. Experiments and applications indicate that the algorithm and approach are effective in
real-world applications. 相似文献
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Association Rule Discovery and Its Applications 总被引:1,自引:0,他引:1
Cai Zhihua Wu XincaiFaculty of Information Engineering China University of Geosciences Wuhan 《中国地质大学学报(英文版)》2001,12(3)
INTRODUCTIONDataminingorknowledgediscoveryindatabase (KDD)hasinrecentyearsattractedalotofinterestinthedatabasecommunity .Theinterestismotivatedbythelargeamountofcomputerizeddatathatmanyorganizationsnowhavetheirbusi ness .Forinstance,supermarketsstoreelec… 相似文献
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Developing a Geological Management Information System: National Important Mining Zone Database 总被引:1,自引:0,他引:1
INTRODUCTIONGeographic information systems (GIS) is a newtechnology of storing and processing spatial informa-tion , which can combine graphics with many types ofdatabase .It can also exhibit accurate and real spaceinformation with charts and texts according to actualneed ,and canintegrate geographic locations and cor-related data attributes as an organic whole .Geoscien-tists have shown GIS to be a very useful tool in theanalysis of geoscience problems (Zhao et al .,2004 ;Singer ,1993… 相似文献
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介绍了数据挖掘技术及其模式,列举了几种常用类型,阐述了地矿信息系统数据挖掘技术的必要性和可行性,并对它在地矿信息系统中的应用进行了展望。 相似文献
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On retrieving patterns in environmental sensor data 总被引:1,自引:0,他引:1
As many sensor networks are currently being deployed for environmental monitoring, there is a growing need to develop systems
and applications for managing, processing and retrieving massive amounts of data generated from those networks. In this research,
a query answering system with pattern mining techniques is investigated specifically for marine sensor data. We consider three
applications of pattern mining: similar pattern search, predictive query and query by clustering. In pattern mining for query
answering, we adopt the dynamic time warping (DTW) method for similarity measurement. We also propose the use of a query relaxation
approach that recommends users change parameters of a given query to get an answer. Finally, we show implementation results
of pattern query answering in a marine sensor network deployed in the South East of Tasmania, Australia. Pattern query answering
system benefits in accessing and discovering knowledge from sensor data for decision making purposes. 相似文献
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Block Kriging for Lognormal Spatial Processes 总被引:4,自引:0,他引:4
Noel Cressie 《Mathematical Geology》2006,38(4):413-443
Lognormal spatial data are common in mining and soil-science applications. Modeling the underlying spatial process as normal on the log scale is sensible; point kriging allows the whole region of interest to be mapped. However, mining and precision agriculture is carried out selectively and is based on block averages of the process on the original scale. Finding spatial predictions of the blocks assuming a lognormal spatial process has a long history in geostatistics. In this article, we make the case that a particular method for block prediction, overlooked in past times of low computing power, deserves to be reconsidered. In fact, for known mean, it is optimal. We also consider the predictor based on the “law” of permanence of lognormality. Mean squared prediction errors of both are derived and compared both theoretically and via simulation; the predictor based on the permanence-of-lognormality assumption is seen to be less efficient. Our methodology is applied to block kriging of phosphorus to guide precision-agriculture treatment of soil on Broom's Barn Farm, UK. 相似文献
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地理信息系统在滑坡灾害研究中的应用 总被引:35,自引:2,他引:33
对地理信息系统 ( GIS)技术在滑坡研究中的应用现状作了分析 ,并介绍了笔者在该方面的一些研究成果 ,认为只有在数据获取、GIS与滑坡专业模型的集成、GIS与遥感的集成等方面有较大的突破之后 ,才能充分发挥 GIS在滑坡研究中的作用。 相似文献
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以我国矿业权实地核查数据为例,讨论AutoCAD、MapGIS、ArcGIS3种数据格式转换软件集成开发设计思路,详细剖析数据格式的特点,对建立三者间空间结构、属性、渲染关系的特性分析研究,提出其空间数据跨平台无损转换的整体解决技术方案,开发系统可实现自动批量无损转换,支持统一标准化图件模板定制。 相似文献
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基于规则库的三维空间数据模型 总被引:1,自引:1,他引:0
三维空间对象的形式复杂多样,对象之间的空间关系尚未形成共识.三维空间数据模型的空间及非空间关系的表达更是难以统一.典型的三维空间数据模型包括面向实体型、面向关系型和混合型3种数据模型,但这些模型存在诸如拓扑操作困难、对象语义描述不完整、关系表达欠缺等一系列不足.通过分析、综合3种模型的优缺点,以顾及拓扑面向实体的三维矢量数据模型为基础,设计了基于规则库的三维空间数据模型.这是一个将关系与对象相统一的新型数据模型.通过对对象关系的分析研究,引入规则的概念,进而构建出规则库,提出对空间对象间关系和结构统一的,完整的表达和管理方式.结合地质、矿山等应用将该三维空间数据模型在多个城市的三维地质应用中进行成功验证.通过应用,说明该模型实现了空间对象的自身结构和对象之间关系的统一表达,具备自定义、可扩展的空间对象关系表达能力,能够适应复杂应用要求,具有良好的应用前景. 相似文献