变换

Implementation of beamlet transform has been studied in this paper and it is applied in line detection in the images polluted seriously by the noise.

在直线检测中，传统的Radon变换和Hough变换是常用的方法，但这两种变换适用于形状比较规则的图像，而且图像中的直线特征比较明显，才有可能检测出来。

A method based on linear singularity analysis of image is presented. The improved method, called Directional Beamlet Transform is better than traditional Beamlet transform about directional information of image and has the ability of representing linear-singularity of image. According to the analysis of linear singularity, edge detection is transferred to detecting singularity point in the coefficient matrix of DBT.

针对基于图像像素点分析的边缘提取方法存在无法同时满足高抑噪性、连续性、定位性等问题，本文提出了方向Beamle 变换方法，在定义图像线奇异性的理论基础上，利用DBT 对图像进行线奇异性分析，依据Beamlet 变换具有的线段提取能力，将图像边缘检测问题转化为方向Beamlet 变换系数矩阵中奇异点的检测问题，以降低噪声点对边缘检测结果的影响。

Then the voltage source type matrix converter mathematics model is established each in 3-phase static and circumrotate coordinate system, moreover by open-loop simulation, the simulation results show that the voltage source type matrix converter can realize the frequency range very broad sine wave input-output, moreover by regulating circuit parameter, the power factor in input side reaches 1 approximately, realization static VAR compensator function.

然后分别建立了电压源型矩阵变换器在三相坐标系和旋转坐标系下的数学模型，并且对电压源型矩阵变换器进行开环仿真，仿真的结果表明电压源型矩阵变换器能够实现频率范围很广的正弦波输入输出，而且通过调整电路参数使得输入侧的功率因数约为1，实现静止无功补偿器的功能。

Based on the derived frequency representation of each frame for convolutive mixtures, a modified discrete Fourier transform is proposed for the frequency domain convolutive blind separation. MDFT serves as an optimal transform in the minimum square error sense to replace the traditional DFT.

针对频域卷积混合盲分离，依据所导出的卷积混合信号每帧的频域表示模型，提出了一种最小均方误差意义下的最优变换－修正离散傅里叶变换，用于代替频域卷积混合盲分离中常用的离散傅里叶变换。

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。

The fictive motions are complex, so they are further analyzed according to their inner situations. It is found that the fictive motions are the metaphor of the factive motions.

现实位移类的&向+NP&在不同句法条件下的变换问题讨论了作状语和作补语的&向+NP&的变换问题，简要分析了变换的一些限制条件。

In fact, the multiplicity is caused by the reason that there are a lot of techniques to fractionalize the eigenvalues of Fourier transform in the procedure of constructing the fractional Fourier transform.

实际上，分数傅立叶变换的多样性主要是由傅立叶变换的特征值在构造分数傅立叶变换时可采取不同的分数化方法所决定的。

These matrices are the inversive constant ones and have the size as the same as the length of the signal.

利用基于推选体制的小波变换实现算法，构造出了与具有紧支集的双正交小波滤波器对应的小波变换和逆小波变换的算子矩阵，这些矩阵是大小与信号长度相等的可逆常数矩阵。

A plasma electron density profile in the HT-6M tokamak is obtained when an asymmetric Abel-inversion which depends on plasma shifts is applied to the signals of multichord interferometric measurement.

一种常用的非对称Abel变换是分离变量法，它的基本思想是把测量信号分成对称元和非对称的权函数，对称部分采用标准的Abel变换，变换的结果乘上非对称的权函数。

In this thesis, a new method for designing nonreciprocal binomial transformer is deduced from the design method of the traditional binomial transformer based on the theory of small reflection.

本文将小反射理论应用于非互易二项式变换器设计，从传统二项式变换器的设计方法中导出了非互易二项式变换器的设计方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。