Baidu search engine of the big features and ranking principle

Baidu is the world's best Chinese information retrieval and delivery technology provider, the company known as "the world's largest provider of Chinese search technology." China all provide search engine portal, more than 90% are provided by Baidu search engine technical support, existing customers include Sina, Sohu (Chinaren), Tom (163.net), Tencent, 263, 21CN, Shanghai Hotline, Guangzhou window, Xinhua, North Space-Time, the west time and space, Chongqing Hotline, Jilin Port, daqing information port, Oriental Hotline, Hunan Port, Nanyang Port, Shunde network.

Baidu search engine using high-performance "web Spider" Program to automatically search for information in the Internet, customizable, highly scalable scheduling algorithm allows the searcher in a very short period of time to collect the largest number of Internet information. Baidu in China and the United States have a server, search scope covers the mainland China, Hong Kong, Taiwan, Macao, Singapore and other Mandarin-speaking areas, as well as North America, Europe, part of the site. Baidu search engine has the world's largest Chinese information base, the total amount reached more than 60 million pages, and is still at hundreds of thousands of pages per day rapid growth rate. Because of the background application of efficient information indexing algorithm, greatly improve the retrieval of response speed and the stability of a large number of visits, Baidu search engine for more than 60 million web pages to retrieve a local average response time less than 0.5 seconds.

Baidu Company (BAIDU.COM,INC) was founded in 1999 at the end of the United States Silicon Valley, its founder is a senior information retrieval technology experts, the sole holder of chain analysis patent-Baidu president Robin Li, and his friends-in Silicon Valley has many years of successful experience in the business community Baidu Executive vice President Xu Dr.

The characteristics of Baidu search engine

1. Information processing method based on word combination. It solves the problem of Chinese information understanding, and greatly improves the accuracy and recall of the search.

2. Support the mainstream of Chinese coding standards. Includes GBK (Chinese Code Extension Specification), GB2312 (Simplified), BIG5 (Traditional), and can be converted between different encodings.

3. Intelligent correlation algorithm. The correlation evaluation is carried out based on the combination of content and hyper-chain analysis, which can objectively analyze the information contained in the Web page, thus maximizing the correlation of the retrieval results.

4. Search results can be marked with rich Web page properties (such as title, URL, time, size, code, summary, etc.), and highlight the user's query string for users to determine whether to read the original.

5. Baidu search Support two times retrieval (also known as progressive search or forced search). You can continue to retrieve from the last retrieved results, narrowing the lookup range until the smallest, most accurate result set is reached. It is advantageous for the user to find the content of the real interest in the mass information conveniently.

6. Related Search Word Intelligent recommendation technology. After the user searches for the first time, will prompt the related search word, help the user to look for more related result, the statistic indicates can promote the retrieval quantity to raise 10-20%.

7. The use of multithreading technology, efficient search algorithm, stable UNIX platform, and localized servers to ensure the fastest response speed. Baidu search engine in China to provide search services, can greatly shorten the retrieval response time (a retrieval of the average response time less than 0.5 seconds)

8. Can provide a week, two weeks, surrounded by a variety of service methods. Can be completed within 7 days of Web page updates, is currently the fastest update time, the largest number of Chinese search engine.

9. Search results output support content classified collection, website classified collection, content classified collection + website classified collection, and many other ways. Support users to select the time range, improve user retrieval efficiency.

10. Intelligent, scalable search technology to ensure the fastest maximum collection of Internet information. With the world's largest database of Chinese, to provide users with the most accurate, most extensive, most time-sensitive information provides a solid foundation.

11. Distributed structure, well-designed optimization algorithm and fault-tolerant design ensure the high availability, high scalability, high-performance and high stability of the system under large traffic.

12. High-configurable allows the search service to meet the needs of different users.

13. Advanced Web Dynamic Summary display technology.

14. Unique Baidu Snapshot.

15. Support a variety of advanced search syntax, so that users query more efficient, more accurate results. "+" (and), "-" (not), "(or)", "Site:", "Link:" are supported, and additional efficient search syntax will continue to be added.