Have you received any fraudulent text messages pushed by big data?

It is normal to receive text messages and big data. When you buy this card, your information will be sold. So it is easy for people who monitor the epidemic to find you.

One is the source location method, that is, the location information is determined by the mobile data transmission mode of the mobile phone. This is different from the GPS we often hear. When the mobile phone sends and receives signals, it will automatically connect to the nearest signal transmission tower. Through the signaling data signal transmission tower containing base station information, all activities of mobile phones can be identified and traced, so as to track the location and path of mobile phone users. This is the most commonly used method and a new place.

The most efficient screening method of epidemic big data. Second, through social interaction.

Information analysis, such as contact with people in nearby communities and markets. This does not mean that through social software.

Information judgment, but combined with existing data, through telephone surveys, groping visits and other means. After the outbreak of the epidemic in Beijing, nearly 65,438+10,000 community (village) workers in Beijing invested 7 120 communities (villages), and more than 300,000 people were investigated. Third, it can be confirmed by the information in the article. At the beginning of the epidemic in Beijing, after analyzing the confirmed personnel, the Xinfadi market was determined as the birthplace, and then the seafood market was further determined and salmon was found.

The virus is carried on the chopping board, and it is also an important means to check the close contacts related to the items quickly.