查询词典 periodic function

Such phenomena are analytically verified when the coupling matrix is diffusively coupled with periodic and Neumann boundary conditions.

当耦合矩阵是扩散耦合且具有周期与诺曼的边界条件时，这种现象将被分析地证实。

In Chapter two, we discuss structure preserving discretization method for the one dimensional nonlinear Schr〓dinger equation with periodic boundary value condition by means of spectral method.

在第二章中，主要结果是讨论了一维非线性薛定谔方程的保结构离散化方法，采用谱方法给出了此方程的全离散计算格式。

The solution of some practical problems in engineering can be regarded as that of periodic solution of nonlinear autonomous systems according to the opinion of mathematics, The problems of this kind are analysed by means of the direct numerical method in this paper,The simple and convenient Draw Newton Method is applied for solving the parameter vectors in iteration course along with the calculation of a practical engineering problem.

日I崖旨J，'口工程中的一些实际问题往往可以归结为非线性自治系统，例如描述同步发电机暂态稳定性问题的转子摇摆方程，即是一典型的非线性自治系统。虽然可以用各种小参数摄动法求解非线性系统，但是这类方法是依据对线性系统的解进行"摄动"来逼近非线性系统解的。因而当系统

The information Radon coefficient wrap-around of the line on a finite field was caused by the modular arithmetic so that the Radon coefficient information in the periodic oscillations direction was processed with discrete cosine transformation, and other direction information was processed with wavelet analysis in order to reduce the wrap-around of rebuilding information. At the same time, according to the characteristic of the noise, one kind of denoising threshold selection plan was proposed.

正交有限脊波分析处理信息时，有限域平面上的直线由于模运算的存在而引起信息Radon系数的卷绕，为此，对Radon系数周期振荡方向的信息采用离散余弦变换处理，其他方向信息采用小波分析处理，以减少卷绕对信息重建影响；同时，结合图像信息中噪声的特点，提出了一种去噪浮动阈值的选取方案。

Both the Dirichlet and the periodic boundary conditions are considered for solving the local microscopic model when the water flow in heterogeneous unsaturated soils is simulated by FDHMM.

在应用FDHMM模拟非均质非饱和土壤中的水流问题时，对于局部微观模型的求解，我们既考虑Dirichlet 边界也考虑周期边界。

In response to signals and system simulation studies, MATLAB also demonstrated its strong role, with MATLAB simulation for the time signal convolution, discrete, continuous LIT system of time-domain analysis, synthesis and periodic signal of decomposition, the bi-frequency system Domain analysis, signal modulation and demodulation, discrete systems, the Z-domain analysis.

在信号与系统仿真响应的研究中，MATLAB也体现其强大的作用，用MATLAB仿真连续时间信号的卷积计算，离散、连续LIT系统的时域分析、周期信号的合成与分解、系统的复频域分析、信号的调制与解调，还有离散系统的Z域分析。

Taking discrete Fourier series and Fourier Transform of periodic sequence as an example,this paper expounds how to simplify those abstruse theory by using straightforward mathematical knowledge which students are well-informed.

本文以周期序列的离散傅立叶级数和傅立叶变换的推导为例，就教师如何用简单的或学生所熟悉的数学知识，进行深入浅出的教学进行了探讨。

In order to discriminate ordinal and periodic data, new discriminant analysis method should be explored.

要对有序又有周期数据进行判别分析，就要探索有序判别的新方法。

The time evolution of two-atom entanglement displays periodic entanglement and disentanglement when the coupling coefficient of Stark effect is much smaller, while the disentanglement will disappear when the coupling coefficient of Stark effect is much larger.

当 Stark 效应耦合系数很小时，两个原子间纠缠度的时间演化特性呈现周期性纠缠和退纠缠现象；当 Stark 效应耦合系数很大时，原子间退纠缠现象消失，即原子始终保持在纠缠状态。

Some dispersion relations of optics phonon in periodic structure are studied in detail in the article.

本文详细的讨论了一些周期结构的色散关系。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。