| 摘要 |
Systems and methods for extracting information from large databases include the initial step of searching a database using a query. The search results are then normalized by formatting the search results in a standard text format. The normalized search results are then crawled according to a predetermined algorithm to yield candidate information, which includes establishing sequences of keywords and generating hash tables that correspond to the keyword sequences. For each paragraph of candidate information, a defined possibility for each hash table entry is calculated. If the possibility is above a predetermined value, the candidate information paragraph is extracted from candidate information and presented to the user. Only the paragraphs that have a possibility that is above the predetermined threshold are displayed and presented to the user. Displayed search results rated as useful by the user are added to the query and to the keyword sequences to accomplish iterative, context-directed searches. |
