1) periodic constant
周期常量
1.
This paper introduces the concept of periodic constant and the process of transforming induction scalar to difference equation.
周期常量是指循环中值呈周期性出现的递归标量。
2) aperiodic time constant
非周期分量时间常数，非周期时间常数
3) period constants
周期常数
1.
At the same time,by means of computations of period constants,the necessary conditions for such isochronous center are obtained.
同时通过对周期常数的计算,得到了该复解析系统的等时中心的必要条件,并利用多种有效途径逐一证明了条件的充分性。
2.
The paper introduces the transformation of the quasi-analytic systems into complex analytic systems and solution to center conditions and isochronous center conditions for a class of quasi-analytic systems by means of computations of singular point values and period constants.
首先,将拟解析系统转化为复解析系统,然后通过对奇点量和周期常数的计算,得到了该拟解析系统的中心条件和等时中心条件。
4) frequent return period
常返周期
6) cyclic disorder
周期性失常