Abstract: 【Purpose/significance】From the perspective of multi-feature data fusion of document entities,a theoretical model of data fu?
sion based on subject fingerprint-citation coupling is constructed,and the data fusion process is analyzed empirically.【Method/pro?
cess】First,the theoretical explanation and mathematical mechanism analysis of the method and logic of the fusion of subject finger?
prints and citations are carried out; secondly,breast lobular carcinoma is selected as a case to present the data fusion process of the
subject fingerprint and the citation feature items; finally,the comparison between the category attribution of subject fingerprint and the JCR subject to which the citation journal belongs reveals the functional characteristics in revealing knowledge representation.【Result/conclusion】The 2-mode knowledge network can play the function of subject fingerprints and citations to reveal the subject and knowl? edge structure jointly.The citation information represents the relatively stable knowledge structure information of the subject such as the subject foundation and subject background of the research,and the subject fingerprint represents the dynamic knowledge subject information such as the frontier of subject research,sudden change themes,and emerging trends.【Innovation/limitation】The theoretical model and analysis method of fusing subject fingerprint and citation is an effective attempt to combine content analysis method and ci? tation analysis method from the level of data fusion.Future research will focus on multi-mode knowledge network construction,network structure analysis and quantitative measurement research,so as to further improve the scientificity and universality of the theoretical model in the field of knowledge service.