What scientific knowledge is there in the Winter Olympics?

Scientific knowledge in the Winter Olympics includes:

First, the physical knowledge of friction

When two objects are in contact with each other and squeezed, when they have relative motion or a tendency to move, a force will be generated on the contact surface to hinder the relative motion or the tendency to move. This force is called friction (Ff or f).

Second, the chemical knowledge of carbon dioxide transcritical direct ice making

Carbon dioxide is gaseous at normal temperature and pressure. After a certain pressure is applied, it can be liquefied into liquid or even condensed into solid (i.e. dry ice). After the pressure is reduced, liquid or solid carbon dioxide can be quickly vaporized (or sublimated) into gas, absorbing a lot of heat, thus achieving the purpose of reducing the environmental temperature.

Third, graphene in cutting-edge technology.

The lowest temperature in the Beijing Winter Olympics can reach MINUS 30 degrees Celsius. In order to make the ceremonial dress beautiful and warm, black material was specially added to the dress. This is a graphene heating material developed by China Hangfa for this Winter Olympics, which can quickly heat up and help staff keep out the cold.

Fourth, the food delivery robot

When the food is ready, the athlete can call the robot to deliver the food, and the robot will deliver the prepared food to the room designated by the athlete. His companions include bartending robots, cleaning robots, welcoming robots and cooking robots. They can not only complete the task perfectly, but also answer any questions you have intelligently.

Five, artificial intelligence referee

In order to improve the training efficiency and effect of aerial skills, an artificial intelligence referee and coach system was developed. The system has been applied to the daily training of a project since 20 19, providing multi-dimensional index analysis such as motion trajectory and body posture, and can point out the losing action in real time, providing professional judgment and guidance for coaches.