复振幅

用DFT实现连续时间信号频率和复振幅的计算

Account the Frequency and Complex Amplitude of the Continue Time Signal with DFT

光波场在垂直光轴方向的参考面上的复振幅研究

The complex amplitude of light wave fields in the reference plane vertical to optical axis

包括考虑了相对论条件下的电子运动方程和反向辐射影响下的线路方程，以及高频电子流n次谐波的复振幅方程，并进行了归一化。

The equations include the circuitry equation considering reverse radiate and moving-electron equation considering relativity , and the complex amplitude equation of n harmonics in high frequency electron current .

由于加窗插值FFT算法得出的幅值比是频率偏移量的N次多项式，同时复振幅的修正系数中不仅含有频率偏移量的N次多项式还有三角函数，计算量很大。

The amplitude ratio is N polynomial of the frequency offset , and the complex amplitude correction factor has N polynomial as well as trigonometric function . So it gets a lot of calculated amount .

文中根据DFT与CFT的关系式，具体分析了不同频率的连续时间信号的频率和复振幅的计算方法。

In this paper , based on the expression of DFT and CFT , a method is proposed for precisely estimating the spectrum of the continuous time signal in the different frequency .

分析了偏心高斯光束在三维空间的复振幅分布、强度分布以及在ABCD矩阵所描述的光学空间的变换三、发展的特点；

The complex amplitude distribution and intensity distribution of decentered Gaussian beams in three dimensions are analysed . Its transform characteristics in an optical space represented by ABCD matrix are also given .

在Kirchhoff衍射理论的基础上，应用随机信号相关原理，推导了作刚体运动的界面上反射超声散斑在空间运动时，保持其复振幅相关的必要条件。

Based on the Kirchhoff diffraction theory , the necessary condition for keeping the correlation of the complex amplitudes of the ultrasonic speckles back scattered from an interface in rigid body motion is deduced by applying the correlation principle .

多光子光学双稳性的复振幅解析分析

Theoretical analysis of complex amplitude of vibration for multi-photon optical Instability

轴外点光源复振幅分布函数的讨论

Discussion of off - axis point source complex amplitude function

复振幅法在再生放大器增益研究中的应用

Discussion of Gain in Regeneration Amplifier with Complex Amplitude Method

利用复振幅滤波器实现激光作用区温度均匀化的理论分析

Theory study of using a complex filter for temperature uniform in laser distribution region

轴对称衍射波场复振幅分布的一种新形式

The new analytic formula of complex amplitude of an axial symmetrical diffraction wave field

高斯界面背向散射超声散斑复振幅统计特性

Statistical properties of complex amplitude of ultrasonic speckles back scattered from a Gaussian interface

洛仑兹脉冲光束的复振幅包络解和复解析信号解的比较研究

Comparison of Lorentz pulsed beams obtained by using complex amplitude envelope representation and complex analytic signal representation

怎样通过测量的光强来恢复相位信息，从而恢复光场的复振幅信息，一直以来是现代光学基础研究的重要领域。

So phase retrieval from only intensity measurements has always been an important issue for modern optics .

推倒了光从楔形薄膜反射时反射波复振幅的解析表达。

The analytical expression for the complex amplitude of light reflected from a wedge-shaped thin film is derived .

根据单缝衍射理论推导散射点的夫琅和费和菲涅耳衍射规律，分别给出了散射点的夫琅和费和菲涅耳衍射的复振幅分布情况。

Based on the theory of diffraction , we push over the Fraunhofer and Fresnel diffraction of obscuration .

后焦面上的频率分布还原成像面上的光场复振幅空间分布。

The space frequency distribution on rear focal plane restores to the distribution of complex amplitude on image plane .

参考光干涉提取复振幅的散斑统计函数的实验研究

Experimental studies on the statistical functions of speckle fields based on the extraction of the complex amplitudes by use of interference beam

根据耦合波方程，导出了一维周期性光学超晶格中产生的倍频光的复振幅表达式。

The complex amplitude of the second harmonic generation in a one dimensional periodic optical superlattice is deduced using the coupled wave equation .

在此密码系统中，其解密结果以强度的形式输出，而不是复振幅的形式，而仅由强度输出信息不能轻易获得系统密钥。

In this specific cryptosystem only intensities can be measured at the output , it would not be easy to get the encryption keys .

对复振幅包络解奇异性的产生进行了详细分析，讨论了脉冲啁啾、脉冲宽度和模式对复振幅包络解奇异性的影响。

Generation of the singularity in the CAE solution and effects of the chirp , the pulse duration and the mode on it are analyzed .

在横向旋转模式下，该滤波器为复振幅型光瞳滤波器，纵向倾斜模式下为纯相位型超分辨滤波器。

In the transversal rotation mode , the pupil filter acts as complex amplitude filter and as pure phase filter in the longitudinal tilting mode .

通过一系列的模拟证明，借助于复振幅光瞳滤波器可以实现三维超分辨。

With a series of simulation examples of such filter , it can be concluded that three-dimensional superresolution can be realized with the compleamplitude pupil filter .

本文运用统计学方法推导了全息干涉计量中散斑计量场的统计特性.证明了：干涉计量场的复振幅为复圆高斯随机变量；

The statistical properties of the complex amplitude and the intensity of the interferometric field in holographic interferometry are derived by means of the statistical method .

这些结果可用于数值计算和模拟该系统失调时对输入复振幅的衍射和分数傅里叶变换。

The result can be used in numerical calculation and simulation of diffraction and fractional Fourier transform of input complex amplitude of misaligned single spherical refracting system .

以声场复振幅来描述声场分布，根据基尔霍夫衍射理论，从理论上推导了声透镜的脉冲响应，并通过实验得到了生物组织的功能成像。

By using complex amplitude to describe sound field distributing , acoustic lens pulse response is deduced in theory , and function imaging of biological tissue is obtained .

计算结果表明当脉冲光束存在啁啾时，啁啾量越大，复振幅包络解的奇异点位置离光束中心越近，而复解析信号解在任意大小啁啾的情况下都不存在奇异性。

The results indicate that singularity of the CAE solution closer to the central with larger chirp and the CAS solution doesn 't present singularity with any chirp .

因此，窄带脉冲光束可以采用复振幅包络和复解析信号两种表示式来研究，而对于宽带脉冲光束，必须采用严格的复解析信号表示式。

It is concluded that both of the representations are applicable to study narrowband pulse , but for broadband pulse only rigorous complex analytical signal representation should be adopted .

分析了该技术测量样品纵深结构时图像的形成机理，结果表明它相当于一复振幅线性平移不变系统，从而可用相干传递函数描述系统性能。

It has been proved that the OCT system behaves as a linear shift invariance system and can be described precisely by a coherent transfer function ( CTF ) .