分析了信号的频谱及相干函数。
The frequency spectrum and the coherent function of the signal were analyzed.
信号检测；周期性信号；信号相干函数；统计理论；周期图。
Signal detection; Periodic signal; signal coherence function; Statistical theory; Periodogram.
提出了一种基于平方相干函数的频域自适应最大似然时延估计算法。
A frequency domain adaptive maximum likelihood (ML) time delay estimation algorithm based on squared coherence function is proposed.
因此在工程计算中不计相干函数随频率的变化不会带来太大的误差。
So, in engineering computation it is acceptable to neglect the directional variation of coherence value with frequency.
本文介绍光的相干性概念，其中包括空间相干性、时间相干性和复相干函数。
This paper presents coherence concepts including time coherence, spatial coherence and complex correlation function.
纵振与表面振动的总体相干水平不高，只在部分频率段具有较高的相干函数；
The results show that the surface vibration of the crankcase is induced by 3-D vibration of the crankshaft.
本文从理论上研究了部分相干情形下，各种相干函数及相干度，对直边象场分布的影响。
This paper deals theoretically with the influences of various kinds of mutual coherence function and the degree of coherence on the distribution of straight-edge generated image field.
应用振动、噪声信号频谱分析和相干函数分析技术，从理论上说明变速箱故障诊断的依据。
The theory of coherence function and spectrum of vibration and noise signals is applied in gearbox noise analysis in the paper. The basis of fault diagnosis of gearbox is theoretically introduced.
结果表明，在该通信中，互相干函数的主要贡献来源于相干场，而非相干场的贡献也是较大的。
The results reveal that the main contribution to the mutual coherence function comes from coherence field, and the contribution of incoherence field can not be neglected.
给出了系统的传递函数、多重相干函数及迭代精度，从而得出采用这种控制技术的可行性结论。
The transfer function multiple coherence function and the iteration accuracy of the system are given and hence the conclusion…application of R. P. C. technique is feasible…has been obtained.
指出如果能拟合出脉动风压谱和相干函数的精确公式，该方法在计算效率和计算精度方面均有较大的优势。
If accurate fitting formulas of spectrum and coherent function of the fluctuating wind pressure can be obtained, this method possesses great advantage in computing efficiency and accuracy.
本文采用二阶相干函数理论研究了级联三能级系统中三阶及五阶极化拍频(TPBCTS及FPBCTS)的非线性效应。
Based on the second-order coherence function theory, authors have studied nonlinear effects of third-and fifth-order on polarization beats in a cascade three-level system (TPBCTS and FPBCTS).
在这种情况下交叉项代表两个，1s原子波函数的相干干涉。
So in this case the cross term represents constructive interference between the two 1 s atomic wave functions.
通常情况是函数内包含了过多的循环(不是在循环中执行了过多的内容)，太多的递归，或者只不过是太多不相干但又要一起执行的操作。
Usually this means there's too many loops (as opposed to too much happening in a loop), too much recursion, or simply too many different operations being performed.
方法采用两个不同态的密度算符距离函数方法，从理论上研究两个不同多模奇相干态光场之间的距离。
Methods the distance between two different multimode odd coherent state light fields was analyzed theoretically by the method of distance functions of density operator.
在分析相干光照明下无衍射成像系统理论的基础上，设计了无衍射光成像系统的点扩散函数的测量系统。
Based on the theories of non-diffracting imaging system in coherent light, the measurement system of point spread function (PSF) of non-diffracting imaging system has been presented.
它包括使用两个复数透光片，其中一个振幅透射率等于该系统的相干脉冲响应函数，另一则为其共轭复数。
The amplitude transmittance of one of them is assumod to be the same function as the coherent impulse response of the system, and that of the other being complex conjugate of the former.
根据部分相干光理论，得到了光纤环光谱传递函数。
The spectrum transmission function (STF) of optic fiber ring is obtained with the theory of partially coherent light.
用相干态方法研究了与辐射相互作用的超辐射激光二能级系统的弛豫，给出在光场高温和低温两种极限情况下准几率密度函数方程的解。
This paper studies the relaxation in the two—Level system of the Laser superradiation interacted with radiation by the method of coherence, and gives the solution of light field about sgn.
积分式中的被积函数包含一噪声强度垂直指向性因子，海洋介质分层条件通过该指向性因子影响噪声场的空间相干。
The integrand includes a multiplying factor of the vertical directivity of the noise intensity, and the layered ocean environment affects the spatial coherences via this directivity factor.
结合光纤环光学长度和耦合输出系数，就损耗对光纤环光谱传递函数和相干性的影响进行了分析讨论。
The influence of the optical length, the output couple coefficient of the optical fiber ring cavity upon the STF and the coherence of the loss is also analyzed.
从理论上详细分析了光纤环形腔有内相位调制时的输出光电流功率谱密度函数，该理论对任意相干长度的输入激光光源都是有效的。
The power density spectrum of an inner-phase-modulated optical fiber resonator is analyzed theoretically and experimentally, which is valid for any source coherence time.
在空间域不相干环境背景噪声的假设前提下推导出成像算法的点-扩展函数。
Under the assumption of spatially-incoherent ambient noise, an analytical expression for the point-spread function of the imaging algorithm is derived.
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).
本文在缀饰原子模型中，用波函数得到了共振及非共振情况下单色激光场与二能级原子相互作用的相干拉比解。
The method of dressed atoms is used to obtain the Babi solution for atoms subjected to a laser field. The result agrees with that obtained from the Bloch equation.
其次针对SAR图像相干斑抑制问题，提出一种双变量收缩函数与小波系数显著性增强相结合的SAR图像的斑点抑制算法。
And then addressing SAR image speckle denoising, this dissertation proposed a new method based on bivariate shrinkage function combined with enhancement of wavelet significant coefficients.
针对相干信号源分布式目标，在具体的空间信号分布函数形式未知的情况下，提出了一种基于盲辨识的分布式目标波达方向（DOA）估计方法。
This paper proposes a blind identification approach to direction of arrival estimation of coherently distributed sources without knowing the accurate function forms of the angular signal density.
针对相干信号源分布式目标，在具体的空间信号分布函数形式未知的情况下，提出了一种基于盲辨识的分布式目标波达方向（DOA）估计方法。
This paper proposes a blind identification approach to direction of arrival estimation of coherently distributed sources without knowing the accurate function forms of the angular signal density.
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