一种基于IT2 FLS的方向关系描述方法  

A Direction Relation Description Model Based on IT2 FLS

作　　者：郭继发[1,2] 崔伟宏[2] 李卫贤[3] 彭光雄[2] 

机构地区：[1]中国科学院研究生院 [2]中国科学院遥感应用研究所 [3]河南理工大学万方科技学院,焦作市解放中路142号454000

出　　处：《武汉大学学报（信息科学版）》2010年第11期1365-1368,共4页Geomatics and Information Science of Wuhan University

基　　金：国家科技支撑计划资助项目(2008BAK50B01);中国博士后科学基金资助项目(20080430586);国家自然科学基金资助项目(40801161)

摘　　要：基于IT2 FLS和扩展的8方向不均匀模糊划分模型,建立了顾及参考对象点位误差时地理对象间方向关系的推理方法,给出了度量方向中心不确定性的两个量。这种推理方法同时考虑了参考点点位误差、认知习惯和目标对象在参考点各原子方向的权重,顾及了多方面确定或不确定的信息,在方向关系近似推理中有较大的应用前景。These existing direction models are difficult to consider the fuzziness of direction concept,the level of direction relationship,the uncertainty of spatial data,the local character and global character of spatial direction relation.Characters of direction relation and extended 8-direction asymmetry fuzzy model were introduced at first,the extended 8-direction asymmetry fuzzy model was developed after considering the location error of reference point based on interval type-2 fuzzy set,and the primary membership function and uncertainty of membership was discussed,the FOU of fuzzy directions was analyzed too.Under this model,the reasoning method was built based on IT2 FLS,the KM defuzzifier method was used in the process,and two variables were used to measure the uncertainty of direction center.This method takes the location error of reference point,cognitive habit and percentage of target in each direction tile into account.

关 键 词：区间Ⅱ-型模糊推理系统 方向隶属度误差 不确定性的迹 

分 类 号：P208[天文地球—地图制图学与地理信息工程]