周期函数

周期函数Fourier级数展开式的唯一性

The Uniqueness of the Fourier Series of the Periodic Function

非周期函数展开成Fourier级数的方法

A Method for Expanding a Non periodic Function into Its Fourier Series

用多重Fourier级数的一种球形线性平均逼近周期函数

Approximation of functions by certain spherical linear means of multiple Fourier series

利用福里哀级数的（k，（？））平均数逼近连续周期函数

The approximation of continuous periodic functions by mean & ( k ,(?)) of Fourier series

研究了二元Jackson多项式对周期函数的逼近阶估计。

The estimate of approximation by bivariate Jackson polynomials is investigated .

周期函数级数定义的空间曲线的Packing维数

The Packing Dimension of the Graph of Fractals Repressed by Periodic Function Series in 3 Dimension Space

周期函数的Lagrange型插值逼近

On the approximation of periodic functions by Lagrange type interpolation

FMS加工周期函数的特性与缓冲区容量的最优分配

The Characteristic of FMS ' processing Period Function and the Optimum Allocation of Buffers'Capacities

研究了一个以周期函数为系数的非线性常微分方程系统ESB模型。

A nonlinear ordinary differential equation system is studied with periodic coeffients which is the extended simplified Brusselator model .

然后根据各子序列的特性分别建立幂函数、周期函数或ARMA模型并进行预测。

Power function , periodical function , and ARMA model are established according to the characteristics of sub-series .

对系数是概周期函数的传染病SIS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。

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 .

Gibbs现象最早源于分段连续周期函数的传统傅里叶级数部分和，这种现象严重制约着实际的工程应用。

The Gibbs phenomenon originated from the partial sums of Fourier series for non-periodical piecewise continuous function , which affected seriously the series in engineering applications .

在外力f（x，t）是时间t的拟周期函数，非线性项g（u）满足一定的条件下，通过引入过程的概念，证明系统存在一致吸引子，并给出吸引子维数的上界估计。

When the external force f ( x , t ) is quasi period about time t and the nonlinear term g ( u ) satisfies some conditions , the existence of the attractor was proved and its Hausdorff dimension was estimated .

该文提出了一种在分块DCT的低频交流系数中利用周期函数的性质并结合加密技术和JPEG量化系数嵌入有含义的水印图像，并可以盲检测。

Incorporation with the property of periodic function , encryption technology and JPEG quantification coefficient , a new blind meaningful image watermarking method based on block discrete cosine transform ( DCT ) AC coefficient is proposed .

某些结果类似于Ivanov所证的周期函数的情形。

Some of the results are similar to the results in the case of periodic function obtained by Ivanov .

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。

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 .

讨论带HollingTanner相互作用项的2种群Lotkavolterra生存竞争扩散模型，其中系数是渐进周期函数，当系数满足一定条件时，该系统是持久的。

The two species Lotka Volterra competition diffusion systems with the Holling Tanner interaction terms are considered , where all the coefficients are asymptotically periodic functions respectively . Under certain conditions on the coefficients , it is shown that the system is permanent .

双悬臂梁DCB试样模型在拉伸阶跃载荷的作用下，应力强度因子的动载系数可以近似用一个周期函数表示，它的变化周期与载荷加载点的位移变化周期相同。

The stress intensity factor of twin cantilever beam can be approximated by a periodic function under tensile step load . The change cycle is as the same as the displacement cycle of loading point , and is a function of prefabricated crack .

用几何参数表方法替代FDK（Feldkamp-Davis-Kress）算法可以避免由于周期函数的存在而产生的大量重复计算。

This paper presents a geometric parameter lookup table method for fast implementation of the FDK ( Feldkamp-Davis-Kress ) algorithm using periodic functions , i.e. , the backprojection addresses and weights are calculated in advance .

在移相干涉技术的相位计算中，周期函数arctan的相位值分布在[-π，π]之间，相位值分布的跃变形成了被压包后的波面。

In phase calculate of phase-shifting interference technique , Because of the periodicity of function arctan , all the phase values are ranged over - π to π . The transitions of phase values form wrapped wavefront .

关于等价中介殆周期函数和Dohr殆周期函数

On Equivalence Between Almost Periodic Function And Bohr Almost Periodic Function

关于周期函数微积分特性的讨论

On The Special Property Of Differential And Integral Of Periodic Function

关于求解功率问题时非周期函数用傅立叶级数展开的探讨

Discussion on Non-periodic Function Carried out by Fourier Series when Calculating Power

基于周期函数空间的通用功率定义

A universal definition of power based on periodic function space

一种带噪声的周期函数数值微分方法

A Numerical Differentiation Method for Period Function with Noisy Data

一类平面多项式系统的周期函数的临界周期个数

The Number of Critical Periods for a Planar Polynomial System

一类广义概周期函数的结构性质

Constructive Properties of a Kind of Generalized Almost Periodic Functions

用线性电路模拟非正弦周期函数信号的波形

Using Linear Circuit to Simulate Nonsinusoidal Waveforms of Periodic Signals

渐近概周期函数和渐近概周期序列的一些结果

Some results for asymptotically almost periodic functions and asymptotically almost periodic sequences

周期函数的几个判定定理半分离空间的等价性定理

Several Decision theorems for the periodic function Equivalent Theorms of Semi-separating Space