3 the effective value of a non sinusoidal periodic function is equal to the square root of the square sum of the constant component value and every harmonic component effective value 非正弦周期函数的有效值等于直流分量与各次谐波分量有效值的平方和的平方根。
The properties of asmptotic periodic function and the asmptotic periodic function space are studied , accordingly , we have , the asmptotic periodic function space is banach space 并在此基础上，进一步研究渐近周期函数所构成的空间，相应的得到渐近周期函数空间是banach空间
Most radar signals are non - stationary signals , but they are cyclostationary signals , namely , the correlation function of radar signals is periodic function of time 大部分的雷达信号都是非平稳信号,但它们都具有循环平稳特性,所谓循环平稳信号是指相关函数为时间的周期函数的一大类非平稳信号。
Emulation on nonsinusoidal single - phase and nosinusoidal balanced three - phase systems are also given . there are nine kinds of arithmetic of ac sampling based sinusoidal and periodic modal in this paper 本文还综述了基于正弦函数和周期函数模型的9种交流采样算法，分析了影响测量精度的原因并给出了解决措施。
In this paper , we mainly study coexistence problem of nonautonomous predator - prey system with n - predator and one - prey , and study the existence of positive periodic solutions when the coefficients are periodic functions 本文主要研究n + 1维非自治捕食者-食饵系统的共存问题，进一步当系统中的系数为周期函数时研究了系统周期正解的存在性。
Based on some results for almost periodic functions and almost periodic sequences , some results for asymptotically almost periodic functions on r ( superscript + ) and asymptotically almost periodic sequences on z ( superscript + ) are obtained 摘要主要利用概周期函数和概周期序列的一些结果，给出了r (上标+ )上渐近概周期函数和z (上标+ )上渐近概周期序列的相关结果。
We present existence theorem for pseudo almost periodic solutions with piecewise constant argument by means of unique decomposite character and for pseudo almost periodic sequence solutions of relevent difference equations 摘要利用伪概周期函数唯一分解性质，研究相关差分方程的伪概周期序列解，并以此为工具得出一类带逐段常变量微分方程伪概周期解的存在唯一性。
Some fundamental methods in mathematical analysis are applied to prove the unique decomposition theorem : the distance between vector - valued pseudo almost periodic functions in metric spaces and almost periodic functions is an ergodic perturbation 应用数学分析中的基本方法证明了唯一分解定理，即距离空间中的向量值伪概周期函数和概周期函数之间的距离是一个遍历扰动。
For an instance , the various coefficients of volterra - lotka predator - prey systems [ 30 ] depend on both x and t modeling the fact that effects vary in both time and space ; the periodicity of coefficients models seasonal fluctuations : occurring periodic solutions Volterralotka捕食模型中如果加上一些环境、季节等因素，即各系数为。或l的函数，特别是为丁一周期函数，方程将出现周期解的情况训6 ’
If the initial photon state is a fock state , the probability density of the electron exhibits bifurcation and confluence and the corresponding photon distribution is a time - periodic function which result from the energy exchange between the electron and field Ck态时，随着时间的演化，电子的儿率密度呈现分叉现象，相应的光子数分布是时间周期函数，这是由于电子与光场之间有能量交换。在这种情况下，系统是封闭的。
