According to the nonlinear oscillation theory and the obtained equation, the nonlinear characteristics and evolution law of Kunming precipitation anomaly system were studied.

The causes and essence of the torsional oscillation of large turbogenerator which consider as a kind of complex open system was investigated by using nonlinear science theory.

In this paper, the theory and application of the Method of General Estimation on the study of the continuous oscillation of nonlinear control system has been introduced in brief.