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It was composed by permittivity with periodic structure in one、two or three dimension.

光子晶体是一种新型的光学材料,它是将不同介电常数的介质材料在一维、二维或三维空间内组成具有光波长量级的周期性结构。

A successful strategy leading to one-, two-, and three-dimensional (1D, 2D, 3D) systems is the using of metal cations of link reactively stable coordination compounds containing potential bridging blocks, i.e.

一种成功的设计具有孤立异金属多核结构、一维、二维和三维超分子结构的方法就是以"配合物为配体"的策略。

Using Extended Virial theorem , three recurrence relation of the average value of coordinate operator for linear harmonic oscillator, spherical harmonic oscillator and like-hydrogen ion were obtained respectively.

针对一维谐振子、类氢离子和三维各向同性谐振子三个量子体系,应用超维里定理,推导了幂坐标算符平均值的递推关系,方法较通常简洁明了。

Then, in second part, we consider the existence and uniqueness of global regular solution for one-dimensional and 2-D radial symmetric Landau-Lifshitz equation.

第二部分我们研究一维Landau-Lifshitz方程齐次Neumann边值问题和二维柱对称Landau-Lifshitz方程Neumann边值问题解的正则性。

Firstly, the digital watermarking was transformed randomly, and then encrypted by chaos. The encrypted watermarking was transformed to one-dimensional row vector, and the pixel value was sorted. The coefficient of primitive image of stationary wavelet transformation was expanded to one-dimensional row vector, too, and then the sorted watermarking was embedded to the sorted low frequency and turned to two dimensions.

本算法先将数字水印图像进行置乱变换,然后将置乱后的水印图像进行混沌加密,将加密后的水印按行展开成一维行向量,并将像素值从大到小排序,将原始图像平稳小波分解得到的低频系数也按行展开成一维行向量,并按从大到小排序。

A new approach-two dimensional principal component analysis(2DPCA) is developed for face recognition. 2DPCA approach dont need to transform the image matrix into feature vector. It directly uses the image matrix to construct the sample covariance matrix.

5研究了二维主成分分析(2DPCA)方法,2DPCA方法不需要先将图像矩阵展开成一维向量,而是直接利用图像矩阵来构建样本协方差矩阵,所以2DPCA比PCA的识别时间更短,识别更高。

The former mainly functions to quantize DCT coefficients gained after one—dimensional DCT to make it maps a range of 0—255 and form spectrally—decorrelated eigen images of JPEG compression.

一维量化器的主要作用是量化一维DCT变换后得到的DCT系数,使其映射到0~255范围内形成可由JPEG算法压缩的特征值图象。

Using a one--dimensional differential thermocline model, we simulated the temperature and thermocline of Yellow and Bohai Sea.

本论文建立了黄渤海环流的三维斜压模式,进行了黄渤海三维环流的数值模拟研究,另外,用一个温跃层一维微分模式对黄渤海的温度及跃层现象进行了数值模拟,最后,建立了一个黄渤海温度及环流的数值模式。

The code work was included in programming of thermonuclear reaction and α-particle heating and techniques used in 1D and 2D ignition simulations. The 1D simulation result agreed well with the self-similarity solution of α-particle heat conduction.

论文程序工作主要完成了热核反应和α粒子加热部分程序模块的编制,并解决了直接驱动一维和二维点火模拟中的一些技术问题,所编程序的一维模拟结果与α粒子热传导自相似解很好地相符。

The ambiguity of DOA estimation due to ignorance of the function form of angular signal distribution is analyzed and the DOA estimation without ambiguity is given. 4. A method of DOA estimation of distributed sources is proposed by using the knowledge of the unimodal property of angular signal distribution and independence between different distributed sources.

利用角信号分布函数的共轭对称性,提出了基于噪声子空间的极小最小特征值一维搜索分布式目标DOA估计方法,和基于信号子空间的极大最大特征值一维搜索分布式目标DOA估计方法。

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