Research on similarity algorithm improvement of dynamic tracing disciplinary themes based on co-word analysis

Research on similarity methodology of dynamic tracing disciplinary themes based on improved similarity algorithm is the improvement and perfection of current similarity methodology based on co-word analysis, and also is good supplement to the mapping method of dynamic tracing disciplinary themes based on co-word analysis. Three algorithms of similarity methodology have common shortcoming that lacking of deeply analyzing the relationship of theme evolution. Aiming at the common flaw and deeply analyzing theme evolution, author has done some improving research based on Coulter´s similarity index, and expatiated on the related problems of improved algorithm. Through this research, we can more deeply and imperceptiblly reveal the relationship of theme evolution, and more accurately trace the evolution track of disciplinary theme.