What are the categories of commonly used search engines based on how they work?

Commonly used search engines can be divided into three categories: full-text search engines, directory index search engines and meta-search engines according to their working methods. A search engine is a retrieval technology that uses specific strategies to retrieve information from the Internet and feeds it back to users based on user needs and certain algorithms.

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What is a search engine?

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The so-called search engine is based on user needs and a certain algorithm, using specific strategies to retrieve formulated information from the Internet and feedback to the user A search technology. Search engines rely on a variety of technologies, such as web crawler technology, retrieval and sorting technology, web page processing technology, big data processing technology, natural language processing technology, etc., to provide information retrieval users with fast and highly relevant information services.

The core modules of search engine technology generally include crawlers, indexing, retrieval and sorting, etc. At the same time, a series of other auxiliary modules can be added to create a better network usage environment for users.

Classification:

Search method is a key link in search engines and can be roughly divided into four types: full-text search engines, meta-search engines, vertical search engines and directory search engines. Each of them has its own characteristics. features and are suitable for different search environments. Therefore, flexible selection of search methods is an important way to improve search engine performance.

Full-text search engine is a search method that uses crawler programs to crawl and index all relevant articles on the Internet; meta-search engine is a secondary search method based on multiple search engine results and integrates them; vertical search engine It is a professional search method for quickly retrieving data in a specific industry; directory search engines are search methods that rely on manual collection and processing of data and place it under classified directory links.

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