In order to improve retrieval efficiency, retrieval results can generally be evaluated through recall rate and precision rate, response time, retrieval convenience, retrieval cost and benefit.
Indicators for measuring retrieval efficiency include recall rate, precision rate, response time, retrieval convenience, retrieval cost and benefit, etc. Since the search quality has a direct impact on the examination quality of invention patent applications, during the substantive examination stage, examiners often have to spend a lot of time on search and further optimize the technology with an in-depth understanding of the technical connotation, search tools and search databases. Search method.
In order to more effectively improve retrieval efficiency. Specifically, the most commonly used methods to improve retrieval efficiency include improving the accuracy of keyword extraction and extracting accurate classification numbers.
Classification of retrieval:
1. Traditional document retrieval
The tool often used in traditional document retrieval is index card, which records the information of literature materials in the index on the card. Index cards generally record the title, author, subject headings, abstract and other information of the document. When searching for literature, you must first search the index, find its collection location, and then request the information.
2. Network retrieval
In the Internet age, people are searching all the time. There are two main ways to search on the Internet: directory browsing and using search engines.