Unpredictable, random-like motion of deterministic dynamic systems due to their sensitivity to initial values. Also known as chaos. The English word Chaos comes from Greek. Its original meaning is the scene before the beginning of the universe, and its basic meaning mainly refers to the chaotic state. As a scientific term, the word chaos refers to a form of motion.

A seemingly irregular and complicated form of movement in the real world. * * * Homologous is an orderly movement form that originally followed simple physical laws. Under certain conditions, it suddenly deviates from the expected regularity and becomes a disorderly form.

The practical significance of extended data chaos research is manifold:

1. The discovery of chaotic motion makes people see a form of motion that is ubiquitous in nature and has been neglected for a long time, thus understanding many phenomena that were difficult to understand in the past.

2. The discovery of chaotic motion provides a new angle to consider this problem. For example, the problem of long-term weather forecast, the discovery of Lorentz attractor and the sensitivity of the solution of atmospheric dynamic equations to initial values have shaken the original idea that long-term weather forecast can only be solved by improving the calculation accuracy.

3. The study of chaotic motion has important implications for the study of complex life phenomena by precise scientific methods such as physics and mathematics. Such as various biological rhythms, are neither completely periodic nor completely random.