On the Meaning of the Periodicity and the Method for Detecting It

[摘要] A word “Periodicity” is used in various cases and it seems to need some discussions on it. In this paper “Periodieity” was classified into two, namely periodic and cyelie. The former mcans a real periodicity. such as motion of the pendulum, the latter is a periodicity but not exact as former just like motion of the pendulum under the disturbances. Some methods for the search of hidden periodieity and the classification of this two sorts were proposed, and applied to the discovery of few days periodicity in rain, pressure and temperature in Tokyo, and obtained satisfactory results.

[学科分类] 大气科学