This paper is intended to make a systematic study of periodic functions and to popularize them in teaching and learning.
周期函数的周期性是中学数学中的教学内容，掌握了函数的周期性，对函数性质的研究会带来不少方便。
When both the nutrient and toxicant inputs are periodic functions with the same period, the periodic coexistence of populations has been investigated.
当营养输入与毒素输入均为周期变化且有共同周期时讨论了种群的周期共存性。
An epidemic SIS model whose coefficient is almost periodic functions is studied. A sufficient condition of existence and uniqueness of positive periodic solution is obtained.
对系数是概周期函数的传染病s IS模型进行了研究，得到了概周期解存在惟一的一个充分条件。
In this paper, some properties of the periodic functions without minimum period are shown, the main results are: the functions are discontinuous everywhere and the set of periods is dense.
本文讨论了无最小周期的周期函数性质，论证了无最小周期的周期函数的处处不连续性以及这种周期函数的周期构成的集合的稠密性。
Consequently, the timing and rhythms of biological functions must closely match periodic events like the solar day, the tides, the lunar cycle, and the seasons.
因此，生物功能的时间和节奏必须与太阳日、潮汐、月球周期和季节等周期性事件密切契合。
The correlation functions can be used as feedback signal to control the systems from chaos to steady state, chaos to periodic oscillation, or even from chaos to preset output.
用关联函数作为反馈，可使系统从混沌到定态或混沌态到周期振荡，甚至可以实现从混沌态到指定的定态输出。
Using the exponential dichotomy and ergodicity of functions, we discuss the existence conditions of asymptotically almost periodic solution for some linear differential equations.
利用指数二分及函数的遍历性，讨论了一类线性微分方程渐近概周期解的存在性。
In this paper, the periodic solution of sinusoidal PPL equation for FW inputs has been discussed with the traditional qualitative method and Lyapunov functions.
本文用传统的定性方法和函数方法讨论了调频输入的正弦锁相环路方程的周期解。
The unsteady equations of stream and vorticity functions were used for numerical simulation on the process of the vortex formation and periodic shedding from an impulsively started circular cylinder.
利用非定常流函数涡量方程数值模拟圆柱突然起动尾流涡旋的形成及周期性脱落过程。
Witkowski takes periodic blood pressure readings with a cuff attached to my left arm, and Albert monitors my heartbeat and other functions.
Witkowski使用连在我左臂上仪器测取周期性血压读数，Albert监测心率和其他功能。
Functions Daily Green Tips - As the weather changes, you will receive periodic customized caring green tips and PowerWise eco-living ideas to save energy costs.
功能列表 全天候节能生活好点子-因应天气变化，定期提供贴心节能点子，助您智慧用电，享受绿色舒适的生活，又可节省能源开支。
NLREG can handle linear, polynomial, exponential, logistic, periodic, and general nonlinear functions.
NLREG能够处理线性，多项式，指数，对数，周期性地，一般的非线性函数。
The Periodic Solutions Expressed in Terms of Jacobian Functions for Drinfeld-Sokolov Equations;
三角表达式级数之和，用在周期函数分析上。
The Periodic Solutions Expressed in Terms of Jacobian Functions for Drinfeld-Sokolov Equations;
三角表达式级数之和，用在周期函数分析上。
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