Search engine requirements from Google Products

1) Search requirements

Human <---> key <---> Infomation

 

2) Webpage Search

The most mature technology in search, finding information from keywords, using inverted index, this very effective index format;

Other MP3 searches and news searches are all sub-items, either limiting the site's intra-site searches or being particularly time-sensitive and time-sensitive;

 

3) webpage directory navigation

This is to extract keywords from information, automatic web page classification technology; it uses data mining technology, which is also relatively mature. first, build a corpus, including the classification directory and various directories to obtain a certain number of samples; second, the training process, using

A Corpus is used to obtain feature values, extract features, and obtain a model. Finally, each searched web page matches the model and is divided into a specific category.

 

4) Personalized Search

This is based on the person's situation to push information. analyze the user's query logs and user data, build a user data model, and then push the data corresponding to this model to the person. (This is an active push)

There is a kind of personalized homepage that uses RSS technology to implement automatic content push (that is, this model is determined by people themselves and is simplified for personalized search)

Example: Various recommendation subsystems

 

5) map search

Google finally integrated the bus to search for the map. Originally, it was only a vehicle route. Now it is ready to go to the bus route, which is more practical.

Map search is one of the characteristics of Google and one of its unique core technologies. It has powerful functions. It is a powerful tool for Google to use global satellite photos and images in combination with Google Earth.

6) vertical search

Housing, tickets, and so on are in the category of vertical search. With the powerful technical reserve power of Google, if you want to enter the vertical search industry, it is really difficult for others to compete with them, we can only make the service more detailed. Cool News has to work hard ....

Others, such as code search, are just one of their applications...