In the plethora of conceptual and algorithmic developments supporting data analytics and system modeling,humancentric pursuits assume a particular position owing to ways they emphasize and realize interaction between ...In the plethora of conceptual and algorithmic developments supporting data analytics and system modeling,humancentric pursuits assume a particular position owing to ways they emphasize and realize interaction between users and the data.We advocate that the level of abstraction,which can be flexibly adjusted,is conveniently realized through Granular Computing.Granular Computing is concerned with the development and processing information granules–formal entities which facilitate a way of organizing knowledge about the available data and relationships existing there.This study identifies the principles of Granular Computing,shows how information granules are constructed and subsequently used in describing relationships present among the data.展开更多
In this paper,a novel definition of entropy is introduced. It is used for measuring the uncertainty of roughness of knowledge in tolerant rough sets. In addition ,we prove that the entropy of knowledge decreases monot...In this paper,a novel definition of entropy is introduced. It is used for measuring the uncertainty of roughness of knowledge in tolerant rough sets. In addition ,we prove that the entropy of knowledge decreases monotonously as the granularity of information becomes smaller. Then,a new reduction algorithm based on entropy is developed.Simulation results show that the algorithm can find the minimal reduction in most cases.展开更多
提出一种实用性较强的地理信息语义表达及相似性度量模型,实现从地理信息语义建模到相似性度量的完整技术链条。在对地理信息语义表达的内容与尺度分析的基础上,提出地理信息语义描述的基本结构,并将其进一步细化为具有不同大小的语义...提出一种实用性较强的地理信息语义表达及相似性度量模型,实现从地理信息语义建模到相似性度量的完整技术链条。在对地理信息语义表达的内容与尺度分析的基础上,提出地理信息语义描述的基本结构,并将其进一步细化为具有不同大小的语义粒度项,以构建出地理信息语义的细节层次(level of detail,LOD)表达模型,最后依据地理信息概念间相关语义粒度项的匹配关系实现地理信息语义相似程度的定量化计算,在实例分析中则以土地利用类型为例进行相似度计算的实验,通过实验结果与实际经验判断比较验证出该模型具有较强的实用性。展开更多
文摘In the plethora of conceptual and algorithmic developments supporting data analytics and system modeling,humancentric pursuits assume a particular position owing to ways they emphasize and realize interaction between users and the data.We advocate that the level of abstraction,which can be flexibly adjusted,is conveniently realized through Granular Computing.Granular Computing is concerned with the development and processing information granules–formal entities which facilitate a way of organizing knowledge about the available data and relationships existing there.This study identifies the principles of Granular Computing,shows how information granules are constructed and subsequently used in describing relationships present among the data.
文摘In this paper,a novel definition of entropy is introduced. It is used for measuring the uncertainty of roughness of knowledge in tolerant rough sets. In addition ,we prove that the entropy of knowledge decreases monotonously as the granularity of information becomes smaller. Then,a new reduction algorithm based on entropy is developed.Simulation results show that the algorithm can find the minimal reduction in most cases.
文摘提出一种实用性较强的地理信息语义表达及相似性度量模型,实现从地理信息语义建模到相似性度量的完整技术链条。在对地理信息语义表达的内容与尺度分析的基础上,提出地理信息语义描述的基本结构,并将其进一步细化为具有不同大小的语义粒度项,以构建出地理信息语义的细节层次(level of detail,LOD)表达模型,最后依据地理信息概念间相关语义粒度项的匹配关系实现地理信息语义相似程度的定量化计算,在实例分析中则以土地利用类型为例进行相似度计算的实验,通过实验结果与实际经验判断比较验证出该模型具有较强的实用性。
