The invention belongs to the technical field of
natural language processing, discloses a historical dialogue
screening method and device for a dialogue
system, and solves the problems that according to a historical dialogue screening scheme in the traditional technology, cross-time and cross-theme content may be omitted, dialogues without obvious keywords are difficult to process, the
screening result deviates from user expectation, and the
screening effect is poor. And the effect of screening dialogues lacking obvious intentions is poor. The method comprises the following steps: storing historical dialogue data between a user and a dialogue
system based on the time and theme of a dialogue; when historical dialogue screening is carried out, firstly, the similarity between a current question and stored historical dialogue data is calculated, and weighted fusion of
semantic similarity, keyword similarity, theme similarity and context similarity is included; and then based on a preset dialogue screening threshold, combining a similarity calculation result of the current question and the stored historical dialogue data, and screening out historical dialogue data most related to the current question from the stored historical dialogue data. The method is suitable for the dialogue
system.