Method and application of comprehensive knowledge discovery     

SHAZongyao BIANFuling 《地球空间信息科学学报》2003,6(3):48-55

This paper proposes the principle oi comprehensive knowledge discovery. Unlike most of the current knowledge discovery methods, the com-prehensive knowledge discovery considers both the spatial relations and attributes of spatial entities or objects. We intro-duce the theory of spatial knowledge ex-pression system and some concepts inclu-ding comprehensive knowledge discovery and spatial union information table (SUIT). In theory, SUIT records all in-formation contained in the studied ob-jects, but in reality, because of the com-plexity and varieties of spatial relations,only those factors of interest to us are se-lected. In order to find out the compre-hensive knowledge from spatial databas-es, an efficient comprehensive knowledge discovery algorithm called recycled algo-rithm (RAR) is suggested.  相似文献   

典型地物波谱知识库建库与波谱服务的若干问题   总被引：15，自引：1，他引：14  

苏理宏  李小文  王锦地  唐世浩 《地球科学进展》2003,18(2):185-191

地物波谱知识库的建立旨在满足应用需求。为达到数据的共享,波谱知识库应对遥感实验测量的波谱数据和相关信息如观测规范、实验环境有清楚的说明,即要有完备的元数据让用户知道波谱知识库中是什么样的数据。为弥补地面测量数据与用户需要数据的时间空间尺度差异,用于外延观测数据的遥感物理模型必不可少;这要求收集分析遥感物理模型,评价其适用条件并创建模型元数据,使用户了解在其工作条件下有何适用的模型,模型的依据是什么;同时波谱库使用遥感物理解析模型和计算机模拟模型完成植被参数的时间扩展和沿叶片-冠层-像元 3个层次的观测尺度空间扩展,从而产生像元尺度可见光到热红外波段的参考波谱。为实现因特网上的波谱知识共享,需要研究如何组织波谱数据和模型,让用户方便地远程检索实测的典型地物波谱数据,并可以实时获取由遥感物理模型外延的波谱数据。从上述 3个方面归纳了波谱库建设和服务需要解决的 6个问题。  相似文献   

KNOWLEDGE DISCOVERY OF REMOTELY SENSED DATA FROM ECOLOGICAL VIEW ——A Case Study of Urban Spatial—temporal Relationship in the Pearl River Delta     

HUWei-ping ZHUYin-zhong 《中国地理科学(英文版)》2003,13(1):48-55

From the ecological viewpoint this paper discusses the urban spatial-temporal relationship.We take regional towns and cities as a complex man-land system of urban eco-community,This complex man-land system comprises two elements of “man“ and “land“,Here,“man“ means organization with self-determined consciousness,and “land“ means the physical environment (niche ) that “man “depends on .The complex man-land system has three basic components,They are individual,population and community,Therefore there are six types of spatial relationship for the complex man-land system.They are individual,population,community,man-man,land-land and man-land spatial realtionships,Taking the Pearl(Zhujiang) River Delta as a case study,the authors found some evidence of the urban spatial relationship from the remote sensing data,Firstly,the concentration and diffusion of the cities spatial relationship was found in the remote sensing imagery,Most of the cities concentrate in the core area of the Pearl River Delta ,but the diffusion situation is also significant ,Secondly,the growth behavior and succession behavior of the urban spatial relationship was found in the remote sensing images comparison with different temporal data ,Thirdly,the inheritance,break ,or meeting emergency behavior was observed from the remoted sensing data.Fourthly,the authors found many cases of symbiosis and competi-tion in the remote sensing data of the Pearl River Delta ,Fifthly,The autoeciousness,stranglehold and invasion behavior of the urban spatial relationship was discovered from the remote sensing data.  相似文献   

滑坡灾害预测专家系统LPES   总被引：3，自引：0，他引：3  

袁相儒  谢广林 《岩土力学》1995,16(2):42-51

本文运用面向对象系统分析方法，逻辑与面向对象相结合的程序设计方法和知识表达，精确推理与非精推进相结合的推进机制，建立滑坡灾害预测专家系统ＬＰＥＳ。并用长江三峡地区的滑坡实例验证ＬＰＥＳ的实用性和正确性。  相似文献   

On unified analysis of uncertainty in seismic hazard assessment   总被引：2，自引：0，他引：2  

胡聿贤  陈汉尧 《地震学报(英文版)》1994,7(4):629-636

（胡聿贤，陈汉尧）Ｏｎｕｎｉｆｉｅｄａｎａｌｙｓｉｓｏｆｕｎｃｅｒｔａｉｎｔｙｉｎｓｅｉｓｍｉｃｈａｚａｒｄａｓｓｅｓｓｍｅｎｔ￥Ｙｕ－ＸｉａｎＨＵａｎｄＨａｎ－ＹａｏＣＨＥＮ（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ＳｔａｔｅＳｅｉｓｍｏｌｏｇ...  相似文献   

四川境内成昆铁路泥石流预测预报专家系统   总被引：1，自引：0，他引：1  

赵玲 《山地学报》1990,(2)

四川境内成昆铁路泥石流预测预报专家系统,是根据该线泥石流数据库中有关泥石流沟谷的属性,基于产生式规则,按照一定的推理网络自动进行泥石流预测预报的。整个系统采用模块化程序设计,包括数据库、知识库、推理机、知识获取、解释、人机接口6个模块,使用Turbo PROLOG语言,在IBM-PC/XT 286机上实现。  相似文献   

基于知识的GIS专题数据综合的研究   总被引：3，自引：0，他引：3  

高文秀  龚健雅 《武汉大学学报(信息科学版)》2005,30(5):400-404

分析了GIS专题数据综合知识的分类体系，采用人工智能技术的产生式规则表示法将综合知识形式化为综合规则，并分析了GIS专题数据综合规则体系的形成模式；用实例分析比较了运用规则和不运用规则产生的不同综合结果，并以此进一步体现围绕特定应用专题的专题知识对专题数据综合的重要性。  相似文献   

利用"缓冲法"进行空间数据的插补和知识挖掘   总被引：1，自引：0，他引：1  

王紫生  边馥苓 《测绘信息与工程》2005,30(1):25-27

利用重复查询和运算的数学法则,提出了用MITQueryJoin的方法解决在数据库建库工作中局部“数据空洞”的问题,并实现了科学的知识挖掘。  相似文献   

A swamp and its subjects: conservation politics, surveillance and resistance in Trinidad, the West Indies     

Bjørn Ingmunn Sletto 《Geoforum》2005,36(1):77-93

Once overlooked or scorned for its purportedly “unscientific” and culturally contextual nature, local knowledge has recently become a key ingredient in conservation and development planning in developing countries. However, this abrupt shift in the conceptualization and assumed utility of local knowledge has not received widespread theoretical attention. In addition, the literature on local knowledge is dominated by discussions of the scientific and applied merits of local epistemologies, and little theorization has been devoted to the explicitly spatial and social contexts that inform the encounters between local and scientific knowledge. This article draws on Michel Foucault's notions of subjectification, surveillance, and subjugated knowledge to analyze the liberatory potential of local knowledge through its embodiment in spatially situated subjects. The article builds on a case study in Trinidad, focusing on the subjectification of local fishermen through constructions of local knowledge, and the ways in which this subjectification was reversed and employed in the performance of resistance and intracommunal conflicts.  相似文献   

谈防震减灾宣传的新跨越--以山西晋城市防震减灾宣传为例     

李小壮 《山西地震》2005,(3):31-33

防震减灾宣传正经历一场深刻的变革,介绍了防震减灾宣传的意义,以山西晋城市防震减灾宣传的现状为例,提出了实现防震减灾宣传跨越的几种对策.  相似文献