The so-called search engine is a retrieval technology that uses specific strategies to retrieve specified information from the Internet and feed it back to users according to users' needs and certain algorithms. Search engines rely on a variety of technologies, such as web crawler technology, retrieval sorting technology, web page processing technology, big data processing technology, natural language processing technology and so on.
Provide fast and highly relevant information services for information retrieval users. The core modules of search engine technology generally include crawler, indexing, retrieval and sorting, and a series of other auxiliary modules can be added to create a better network environment for users. Search engine refers to the use of specific computer programs to collect information from the Internet according to certain strategies.
A system that organizes and processes information, provides retrieval services for users, and displays the retrieved related information to users. Search engine is a retrieval technology that works on the Internet, aiming at improving the speed of people's acquisition and collection of information.
Provide people with a better network environment. From the function and principle, search engines can be roughly divided into four categories: full-text search engines, meta-search engines, vertical search engines and directory search engines. With the development of search engines, the infrastructure and algorithms have basically taken shape and the technology is mature.
classify
Search mode is a key link of search engine, which can be roughly divided into four types: full-text search engine, meta-search engine, vertical search engine and directory search engine, each with its own characteristics and suitable for different search environments. Therefore, flexible selection of search methods is an important way to improve the performance of search engines.
Full-text search engine is a search method that crawls all relevant articles on the Internet and indexes them. Meta search engine is a secondary search method based on the results of multiple search engines and integrating them together. Vertical search engine is a professional search method to quickly retrieve data from a specific industry.