波脊

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。

Firstly, the definition of image representation, measure of sparsity, and the basic methods of sparse representation are reviewed. And then, we analyze the performance of nonlinear approximation of Ridgelet, Curvelet, Contourlet and Bandelet transform.

论文阐述了信号表示的定义、稀疏性度量以及图像稀疏表示的基本理论方法，分析与比较了脊波变换、曲线波变换、Contourlet变换、Bandelet变换各自的非线性逼近性能。

Several digital ridgelet transforms are compared in this paper.

本文著重比较脊波变换的几种不同数字实现及对於小波的改进。

Several digital ridgelet transforms are compared in this paper.

本文着重比较脊波变换的几种不同数字实现及对于小波的改进。

To preserve more detail during image denoising, a combined wavelet and ridgelet approach is presented.

为了在图像去噪时更好地保持细节特征，提出了联合小波和脊波的阈值去噪方法。

Each detail image is first denoised with ridgelet threshold method, and then decomposed with wavelet.

对细节图像进行脊波阈值去噪处理，然后再进行单层小波分解。

Numerical results show that ridgelet transform is more effective than the wavelet transform in approximating and denoising images with straight edges.

实验结果说明，脊波在对具有直线边缘的图像逼近和去噪时的确比小波有效。

The temperature step is thought to have a strong influence on the characteristics of the laser diodes.

由于脊形波导的弱自建波导特性，这一温度台阶会对侧向模式的限制产生较大的影响。

An approximate analytical approach, which can be used to analyze the optical characteristics of metal-clad step or graded index waveguides in near cutoff, is presented at first. The mode propagation characteristics of metal-clad step index waveguides in near cutoff are comprehensively analyzed.

GaAs/GaAlAs异质结光波导材料是目前集成光学中的重要材料，本论文在系统介绍外延生长技术的基础上，利用普通的液相外延炉，成功地生长出可用于光波导器件制作的、表面较光滑并具有较大面积（14×16mm〓）的GaAs/GaAlAs异质结光波导材料，C-V法测得波导层载流子浓度为2—4×10〓cm〓，Al-Schottky接触的反向电压大于20伏，平板波导和脊波导通光实验良好。

All I have learned is the history development of spinal manipulation from Hippocrates to D.D. Palmer, and B.J. Palmer. I didn't know Chinese medical doctors long before D.D. Palmer's time had being using manipulation techniques to treat spinal and spinal related disorders.

我所学的是从希波克拉底到西元前和西元后的整脊发展史，我不知道在西元前中医大夫就已经开始通过整脊技术治疗脊椎疾病和与脊椎相关的疾病。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。