空域

Based on the study of the traditional homomorphic algorithm,the most effective high-pass filter in frequency domain is adopted.

因此在研究传统同态滤波算法，选取性能最佳的频域滤波器对图像进行处理的基础上，引入了空域3×3中值滤波，用像素点3×3邻域内9个像素点的中值来代替该点的像素值，旨在对前者无法去除的高频突变云区进行处理。

Based on the proposed synchronization schemes, two robustimage watermarking schemes are presented, which embed the watermark indiscrete wavelet transform domain and spatial domain respectively.Besides, the original image is not needed in watermark detection.

针对所提出的两种水印同步方案，分别提出了两种鲁棒图像水印算法，分别在离散小波变换域和空域嵌入水印，且水印提取不需要原始图像。

The voice just fell instantaneous, a large-scale outer space interspace tangled warfare started, a time entire interspace air zone, both sides starship intercourse shuttle, each kind of firepower fire has formed the light net which interwove, each kind of ammunition exploded the fire sparkling red entire rencountre region, looked by far, here already was one for the grand magnificent smoke and fire banquet which but the death held specially.

话音刚刚落下的瞬间，一场大规模的太空星际混战就开始，一时间整个星际空域，双方星际飞行器往来穿梭，各种火力射击形成了一个交织的光网，各种弹药爆炸的火光映红了整个交战区域，远远看去，这里已是一个为死亡而特意举行的盛大华丽的烟火宴会。

Named after the constellation from which the meteors appear to radiate, the annual Lyrid shower produces the bulk of April's meteors.

天琴座流星雨因其流星自天琴座空域出现并向外辐射而得名，该年度流星雨几乎决定了四月份的流星总数量。

Finally, this project setup a pile station near Taichung harbor. Monitoring and maintenance will continuously to be done to supply oceanographical data for further application.

本计画除上述时空域方向波谱的探讨外，同时并研究发展波浪量测技术，冀能观测得珍贵波浪资料予各界分析研究。

Focusing on the problem that the performance of channel estimation is influenced by spatial correlation in multiple input multiple output systems,a parametrical channel estimation method based on estimating multipath parameters is proposed.

针对多输入多输出系统中信道空域相关影响信道估计性能的问题，提出了一种基于多径参数估计的信道估计方法。

Instead, they were able to find a certain region which was most suitable for living in the natural ecological system in the process of cultural building, and then to build and protect the national habitat which belonged to their own nationality according to their understanding of their nationality's culture.the protection of ecologic was mainly realized by cultural restraint and balance, it had the features of unconsciousness, remoteness ,passivism and regionalism.exploring the features and functions of this kind of protection is good for deepening the awareness of national habitat and offering predecessor's experience and lessons to nowaday ecological protection

古代民族由于所处时空域的限制，不可能全面认识自然生态系统并自觉直接维护生态环境，而是在文化建构的过程中从所处的自然生态系统内人为地分割出一个最适合于本民族生息的区域，按照本民族文化的理解去建构并直接维护本民族特有的民族生境。对生态环境的维护，主要是通过文化制衡来实现的，它具有无意识性、间接性、被动性和区域性。探讨这种生态维护的特点及功效，有助于深化对民族生境的认识并为今天的生态维护提供前人的经验教训。

Secondly, on the basis of the analysis of the spatial-temporal feature of background and infrared targets in infrared sequence, a method for clutter suppression and noise removement based on the association of spatial self-adaptating Two Dimensional Least Mean Square background predict and temperal Higher-Order Cumulant is presented, and its improved version suitable for strong edge rejection and gaussian noise suppression is proposed.

然后针对红外图像序列中弱小目标和背景的空间和时间特性，提出了一种空域改进的自适应二维LMS背景预测和时域高阶累积量相结合的杂波抑制和滤波降噪的预处理方法，理论和实验结果表明，该方法对于抑制强起伏的红外背景杂波和去除高斯噪声的影响非常有效。

Active attack cryptanalysis based and fully scalable FGS encryption algorithm Aimed to the weakness of the current selective encryption algorithms in the sense of cryptanalysis, we design a active spacial—temporal correlation attack scheme and propose a both encryption strategies on base-layer and enhancement-layer. Not only the general FGS stream encryption is dealt with but also the case of FGST (fine granularity sealable temporal) is also well addressed.

2基于主动攻击安全的充分可扩展FGS加密算法针对目前压缩视频流加密算法所经常采用的选择加密方法，通过进行主动时域、空域相关性攻击，指出该类算法存在的问题，包括对于FGS基本层单独加密的安全分析，然后设计实现了基本层和增强层同时加密的安全策略，为保证FGS充分可扩展功能，算法同时还支持细粒度时域可扩展编码FGST(fine granularity scalable temporal)的情况。

Because of the computation load and the implementation complexity of full rank STAP are too great to be accepted and it is really very difficult to obtain enough samples to estimate the covariance matrix.

最初提出的是使用全部空域和时域进行处理的全时空的最优算法的计算量和实现的复杂度令人们难以接受，并且难以获得估计协方差矩阵所需的足够的样本数，后来的研究重点就转移到了降维处理算法上。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷