Automatic hot topic mining system based on internet corpora
A hot topic and automatic mining technology, applied in special data processing applications, instruments, unstructured text data retrieval, etc., can solve problems such as poor scalability and non-reusable matching templates
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[0036] The present invention will be further described below in combination with specific embodiments.
[0037] At first some relevant concepts involved in the present invention are described as follows:
[0038] Named entities: names of people, institutions, places, and all other entities identified by names.
[0039] Named entity recognition: Named entity recognition is a subtask of information extraction. The purpose is to locate and identify named entities that appear in text. The main difficulty of named entity recognition lies in the problem of ambiguity.
[0040] Tf-idf: Tf-idf is a model for evaluating the importance of a word to a document. Tf is the word frequency, which refers to the frequency of word w appearing in the document d, idf is the reverse document frequency, Refers to the product of the reciprocal of the number of documents containing the word w and the total number of documents.
[0041] Cosine similarity: Two vectors with the same dimension exist i...
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