设计了空间域和频率域加密算法。
Encryption algorithms in spatial domain and frequency domain are proposed.
第三章主要论述基于空间域的数字图像复原算法。
Chapter three mainly deals with image restoration in the spatial domain.
数字图像平滑处理可以在空间域或频率域中进行。
It can be accomplished in spatial domain and frequency domain. This chapter presents the ways of the smoothing of digital image.
然后结合图像的帧间信息将图像从空间域映射到统计域。
Based on this, every image frame is mapped from spatial domain to statistical domain.
利用频域-空间域分解法，建立桥梁运行模态识别方法。
Operational modal analysis method of bridge was built based on frequency domain and spatial domain decomposition.
杨赤中法与克立格法，都是对空间域变量进行估计的方法。
Both Yang Chizhong method and Kriging can be used to estimate any variable distributed in space field.
对空间域采用样条元计算，对时间域采用状态空间精细法。
The spline element analysis is applied in space domain and the state space precision method is used in time domain.
对空间域采用有限元计算，对时间域采用状态空间精细法。
The finite element analysis is applied in space region and the state space precision method is used in time region.
本文主要研究了实时系统中的虚拟内存技术以及空间域保护机制。
This paper is focused on the research of virtual memory technology and space domain protection mechanism in real-time systems.
在空间域滤波，尽管能够有效地限制噪声，但是同时模糊了图像细节。
In space domain, we can more effectively constrain noise while it blurs image details.
研究了矢量信道在时域和空间域对信号的影响，即信号的快衰落特性。
This paper studies the fading process of signal in the vector channel from the perspective of time domain and space domain.
对空间域采用混合样条元法，对时间域采用现代控制论中的状态空间法。
The spline finite element procedure is used in space domain and the state space technique in time domain respectively.
该算法采用了简单快速的自适应空间域滤波和代数运算，提高了图像质量。
Simple, fast and adaptive spatial filtering and arithmetic operation are adopted by the algorithm and image quality is improved.
温度场的计算采用时间域上的有限差分及空间域上的有限元相结合的方法。
The method to calculate temperature profile is to combine finite difference of time with finite element of space.
在空间域不相干环境背景噪声的假设前提下推导出成像算法的点-扩展函数。
Under the assumption of spatially-incoherent ambient noise, an analytical expression for the point-spread function of the imaging algorithm is derived.
对MAP和POCS这两种空间域方法进行研究，总结了其基本思想与算法流程。
The basic theories and procedure of the MAP method and POCS method in spatial domain are summarized.
多聚焦图像融合的算法较多，主要由基于空间域和基于频率域的图像融合法组成。
There are many multi-focus image fusion algorithms, mainly consisted of the spatial area based and the frequency area based algorithms.
提出将空间域的透镜列阵法和时间域的光谱色散平滑法结合起来实现靶面的均匀辐照。
A scheme employing a lens array and the technique of smoothing by spectral dispersion is presented for uniform irradiation on targets in inertial confinement fusion.
关于这种既适用于时间域，也适用于空间域的有限元素算法的计算机程序，正在设计之中。
A computer program for this finite element algorithm is being developed for both temporal and spatial dependence.
在此基础上，讨论空间域数字水印算法、变换域数字水印算法以及对数字水印的攻击研究。
On the base, the algorithm of space domain and transform domain and research on the attacks on digital watermarking are discussed.
分数傅里叶变换同时包含了空间域和空间频率域信息，分数相关也可以用于光学图样识别。
The fractional Fourier transform contains the spatial information and the spatial-frequency information simultaneously. The fractional correlation can be used to optical pattern recognition too.
基于变分贝叶斯及相空间重构理论，提出了含噪混沌时间序列相空间域线性回归预测模型。
We present a linearly regressive prediction model for noisy chaotic time series phase space based on variational Bayesian and phase space reconstructive theory.
大部分授权频段在时域、频域和空间域的利用率很低，而公共频段出现了严重的频谱拥挤。
The utilization rate of licensed spectrum is very low in the time domain, frequency domain and space domain, while the unlicensed band is overcrowded seriously.
本文主要讨论在常规雷达低角跟踪中运用波束空间域最大似然（BDML）估计的实现技术。
This paper proposes a BDML estimator used for low angle tracking in conventional radar.
然后，结合图像帧间的差分信息以及灰度分布的先验概率等因素将图像从空间域映射至统计域。
Then, every frame is mapped from spatial domain to statistical domain incorporating the factors such as the difference image from the consecutive frames and the prior distribution of a pixel density.
对于纸页的均匀性分析，通过图像变换，将空间域图像变换到频域或小波域进行分析，获取其特征；
The homogeneity of the sheet is analyzed by image transform, i. e. the spatial domain image is transformed to frequency domain or wavelet domain to obtain the features.
本文基于人类视觉系统(HVS)的特性，提出了一种结合空间域和DCT变换域的数字水印新算法。
Based on the features of human visual system (HVS) a new watermarking algorithm that combines spatial and DCT domain is proposed for digital images in this paper.
详细分析了动力显式算法中虚功方程的空间域有限元离散方法和有限元方程的时间域中心差分离散方法。
The spatial field FE discrete method of the virtual work equation and the time field central difference discrete method of the FE equation in the dynamic explicit method are described in detail.
详细分析了动力显式算法中虚功方程的空间域有限元离散方法和有限元方程的时间域中心差分离散方法。
The spatial field FE discrete method of the virtual work equation and the time field central difference discrete method of the FE equation in the dynamic explicit method are described in detail.
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