The invention provides an investment project duplicate checking method and
system, a computer and a storage medium, and the method comprises the following steps: collecting
declaration data of an investment project, and generating a standardized
data set; semantic analysis is carried out on the standardized
data set to extract
semantic feature vectors, a
knowledge graph related to the
declaration data is constructed, associated feature vectors are generated, and fusion feature vectors are obtained through combination; according to a mean value of the fusion
feature vector and the historical
feature vector, calculating a semantic deviation compensation amount based on a compensation model; and calculating to obtain a target
feature vector, and calculating the similarity between the target feature vector and the historical item feature vector to screen the repeated
declaration data with the similarity greater than a preset threshold. According to the method, semantic and
knowledge graph association are integrated through multi-
modal feature extraction, the defect that semantic understanding of
text matching is insufficient is overcome, feature vectors are adjusted through dynamic semantic compensation, efficient decision is finally achieved through the
similarity matching step, and therefore the duplicate checking accuracy and efficiency are overall improved.