Information analysis for modeling and representation of meaning

筑波大学 ; University of Tsukuba ; 博士（工学） ; Doctor of Philosophy in Engineering ; In this dissertation, information analysis and an information model called the Semantic Structure Model based on information analysis are explained for semantic processing. Methods for self organization of information are also described. In addition, Information-Base Systems for thinking support of research and development in non linear optical materials are explained. As a result of information analysis, general properties of information and structural properties of concepts become clear. General properties of informaiton are as follows: 1)concepts which are a basic unit of information are uncountable, 2)information is not processed unless it is represented, 3)informaiton contains uncertainty. Structural properties of concepts are as follows: 1)concepts have internal structures, 2)concepts have overlap mutually, 3)concepts are relative. The Semantic Structure Model based on information analysis reflects properties of information in the real world. The model is formulated as the extended hypergraphs which are nested labeled directed hypergraphs. Each hyperlink of the extended hypergraphs has a label which describes meaning of information. Nodes and links in the extended hypergraphs are dealt with homogeneously as hyperlinks. The model can describe internal structures of concepts, overlap among ones, and relativity of ones. C-TRAN SS-KWIC SS-SANS and SANS are useful methods for self organization of information. Self organaization of information means that information is organaized automatically by using information itself. Since information stored in computers is vbery large information must be structuralized by self organization, otherwise it is too difficult to structuralize a huge amount of complicated information mannally. Information Base Systems are constructed for thinking supoort of research and development in the sciences and technologies. Information-Base Systems are self organizing systems, which store necessary information ...