离散序列

词组短语

discrete series

与离散序列相关的网络例句 [注：此内容来源于网络，仅供参考]

Then the digital audio signal is set into segments and DWT is performed. Finally the modulated signal is embedded in the coefficients with relatively large absolute value on middle frequency range detail signal adaptively. The original digital audio signal is necessary when detecting the watermark.

在应用扩频技术的算法中，首先将视觉上可辨的二值水印图像降维为一维序列，再将一维水印序列伪随机排序并与m序列作扩频调制，最后对数字音频信号进行分段离散小波变换，把经过调制的水印信息自适应地嵌入到原音频信号小波分解中等尺度绝对值较大的分量上。

The admissible input of 2-D linear discrete singular general model is discussed more deeply, some very effective new criteria for the 2-D singular general model to accept all the input sequence have been developed, and a new algorithm that determines the admissible input sequence of the 2-D singular systems has been proposed.

在线性广义2-D系统可解性方面，首先研究了线性广义2-D连续—离散系统的可解性问题，给出了可解的条件，并给出了等价的判别条件；其次深入研究了线性广义2-D离散系统的允许输入序列问题，给出了系统接受所在区域上的所有输入的新的非常有效的判别方法以及确定系统允许输入序列的新的方法。

Then how to represent a continuous signal in term of a discrete sequence is a fundamental problem.

如何根据离散序列表示一个连续信号是一个基本问题。

For reducing boundary distortion area, the elevations of grid DEM are viewed as a discrete sequence under a generalized coordinate, so that the boundary problem of two-dimensional discrete wavelet transform is turned into the boundary problem of one-dimensional discrete wavelet transform, which not only greatly reduces the boundary distortion area, improves the precision of reconstructed DEM data near the boundary, but also decreases the number of zeros adding on the boundary for wavelet transform, and boosts the compression ratio. On the basis of analyzing the distribution characteristics of coefficients in low and high frequency bands, a mixed entropy coding plan is applied, and a high efficient quantizator called"self-adaptive hard threshold"is established, which is helpful for improving the precision of the reconstructed DEM data and for enhancing compression ratio.

为了减小小波变换山区格网DEM数据压缩中边界失真区域，将山区格网DEM高程值视为广义坐标下的离散随机序列，把二维离散小波变换中的边界问题转换为一维离散小波变换中的边界问题，不仅大大减少了小波变换边界失真区域，提高了重构DEM数据边界点的精度，而且减少了边界补零个数，提高了压缩比；通过对山区格网DEM数据小波变换低频区和高频区变换系数分布特点的分析，采取了霍夫曼—游程混合熵编码方案，设计了高效、低失真的"自适应硬阈值"量化器，即对低频区变换系数不进行量化，直接进行霍夫曼编码；对高频区变换系数则先用"自适应硬阈值"方法量化处理，再进行游程编码。

The initial phase is obtained by removing the frequency item in the multinomial using the DFT coefficient which is from two discrete sinusoid signal sequences of different length.

该方法通过截取正弦波的两段长度不同的离散序列，利用它们的DFT系数来消去正弦信号的频率项，从而估计其初相。

The change phase is estimated by window and interpolation algorithm, and then a phase compensation function can be built accordingly. By multiply this function and the data sequence from the IFFT of the truncated data sequence spectrum in the time domain, the spectral leakages can be compensated when the new data sequence is transformed into the frequency domain by the DFT.

利用加窗插值的方法估计出该变化的相位，并利用估计结果构造出一相应的反相位函数，在时域上将这个反相位函数与由傅立叶反变换产生的离散序列相乘，得到新序列再通过一次傅立叶变换就可达到频谱校正的效果。

The thesis brings forward Random Number Sequence Shuffling Technology in a creative way,it can reduces the Linear Congruential Generator pertinency and discrete grid phenomena prominently.

创造性地提出在遗传算法中随机数序列处理的新方法——随机数序列洗牌技术，有效克服了线性同余发生器产生的随机数序列相关与离散网格现象。

This paper researches the wavelet transform of discrete-time sequences basing on dendriform filer banks in the signal processing field, analyses the theory and design method of two channel conjugate quadrature mirror filter banks and fast implement of discrete orthogonal wavelet transform and generation of orthogonal wavelets, and points out the internal relationship between them.

笔者从信号处理的角度研究了离散时间序列的小波变换利用树状滤波器组实现的方法，分析了两通道共轭正交镜象滤波器组理论及滤波器设计，离散时间序列的正交小波变换的快速实现以及正交小波的构造，指出了其内在联系，最后举例说明了正交小波变换通过共轭正交镜象滤波器组来实现信号分解和重构的全过程。

To increase the security of the watermark, a new binary image encryption algorithm based on TD-ERCS map is presented. The watermark is encrypted by a chaos sequence generated by TD-ERCS map; A novel color image watermarking algorithm is proposed based on discrete chaotic map and 2-dimensions discrete wavelet transform. The watermark is encrypted by the new binary image encryption algorithm, and the encrypted watermark is embed into four sub-bands of the most deep level of blue branch of host image by three-level wavelet transform, and the embedded positions are determined by general cat cha otic map; A novel color-image blind detection watermarking algorithm is proposed based on integer wavelet transform and subsampling. The scrambled watermark is encrypted and embed into the low sub-bands after four sub-images of the Y branch of host image is transformed by two-level wavelet transform, and the embedded positions are determined by Logistic chaotic map, this watermarking scheme can realize blind extraction.

为了提高水印图像的安全性，提出了一种基于TD-ERCS混沌映射的二值水印图像的加密算法，该算法利用TD-ERCS映射产生的混沌序列加密水印图像；将离散混沌映射和二维离散小波变换相结合，研究了彩色图像水印新算法，该算法先对混沌序列加密后的水印图像进行小波变换，再嵌入到宿主图像的蓝色分量的最深层的四个子带中，嵌入位置则由广义猫映射确定；将整数小波变换和图像子采样技术应用于数字水印，提出了一种彩色图像盲提取水印算法，水印嵌入时，先对宿主图像在YIQ色彩空间中的Y分量进行子采样，并对得到的四个子图像分别进行二级离散小波变换，然后将置乱并加密后的水印图像嵌入到小波变换后的低频子带中，其嵌入位置由Logistic混沌映射产生的混沌序列确定，实现了水印的盲提取。

And another construction methods for perfect and quasi-perfect binary array pairs are presented with the help of the relationships among the perfect, quasi-perfect and double quasi-perfect binary array pairs. On the other hand, a new kind of discrete signal is presented in this paper, which is the punctured binary sequence pair and the punctured binary array pair.

另一方面，本文提出了一种新的离散信号，即屏蔽二进序列偶和阵列偶，建立了完整的屏蔽二进序列偶和阵列偶的理论体系，它包括最佳屏蔽二进序列偶理论、最佳屏蔽二进阵列偶理论、准最佳和双准最佳屏蔽二进阵列偶理论，以及屏蔽二元互补序列偶理论。

与离散序列相关的网络解释 [注：此内容来源于网络，仅供参考]

Barker：巴克

2.5 复数信号与时域希尔伯持(Hilbert)变换4.5 巴克(Barker)序列4.8 超正交单纯码及阿达玛(Hadarmard)矩阵6.3 调频信号频谱分析及卡森(Carson)带宽7.1 离散无记忆信源(DMS)编码7.5.1 时分复用(TDM)的原理7.

discrete series：离散序列

discrete random variable 离散随机变量 | discrete series 离散序列 | discrete set 离散集

discrete parameter time series：离散参数时间序列

discrete parameter process 离散参数过程 | discrete parameter time series 离散参数时间序列 | discrete Pareto distribution 离散帕累托分布

discrete set：离散集

discrete series 离散序列 | discrete set 离散集 | discrete spectrum 离散谱

Lees：李斯

驻点热流通量;李斯(lees)公式计算外表面热流通量......快速计算多个n点实序列卷积的新方法 收藏此文 全部作者: 范安东 王娜 李小伟 第一作者单位: 成都理工大学信息管理学院 论文摘要: 利用离散傅立叶变换(dft)的一些性质和将一个复序列分解四个奇偶序列之和的方法,

Wiener：维纳

本书共分9章:随机过程的基本概念、平稳随机过程、马尔可夫过程、时间序列分析、时间序列建模、维纳最优滤波和预测、离散线性系统的最优估计、广义维纳(Winer)滤波、线性系统在随机输入作用下的分析. 每章后都配有适量习题. 4.1 自回归滑动合(ARMA)序列的定义及产生方法第6章 维纳(Wiener)最优滤波和预测6.2 连续维纳一霍甫(