The invention belongs to the technical field of
computer software data processing and
text mining, and particularly relates to a similarity detection method and
system for science and technology project texts. The method comprises the following steps: step 1, obtaining a text, and preprocessing the text; 2, judging an application scene of the text, performing
feature extraction according to selection of the application scene, then converting the extracted features into character strings with fixed lengths, and finally obtaining
fingerprint features of the text through Hash calculation; 3, creating an index instance, adding the data into an index, constructing a Faiiss vector retrieval
library, then performing similarity retrieval through an AAN
algorithm, and obtaining the similarity between the
fingerprint features of the text and the text in the index
library; and 4, sorting and filtering the retrieval results, and judging whether text repetition exists or not according to a set threshold value and outputting the text repetition. According to the invention, the accuracy and reliability of the detection result are improved, and the detection efficiency is improved.