查询词典 spectrum analysis

By DEMON we can get more and stabler line spectrum information than by LOFAR, which is to make power spectrum analysis of signal directly.

通过包络解调技术可获得轴频等调制信息，这就是常用的DEMON谱分析方法。

The controller receives, analyzes and processes the command input by operator via the man-machine interface, to adjust and control the controllable light signal generator according to the analysis processing result and the spectrum result checked by the light checker, the controller outputs the adjustment and result via the man-machine interface to the operator, to output light signal for the result of adjustment and control on the controllable light signal generator, via the light coupler to be coupled partly and feedback to the light checker to be checked, thereby forming a closed-circuit, while the light signal coupled to the light output via the light coupler reaches user target spectrum demand.

本发明公开了一种实现光信噪比可调节的光信号源装置及控制方法，所述装置包括：控制器、人机接口、可控光信号发生器、光耦合器、光信号检测器、光信号输出口；控制器接收操作者输入给人机接口的指令并分析和处理，运用分析处理结果、并结合光检测器检测的光谱结果数据来调节和控制可控光信号发生器，控制器将调节过程和调节结果通过人机接口输出给操作者，对可控光信号发生器调节和控制的结果输出光信号通过光耦合器耦合一部分又反馈给光检测器检测，这样形成一个闭环控制，使得通过光耦合器耦合到光输出口的光信号达到用户目标光谱要求。

The size of tested field was measured using comparison between the tested field image caught through CCD and the plotting paper image when plotting paper was placed in the tested field position with no plasma jet; the emission intensity distribution of tested field was obtained using stepping motor taking fiber probe to scan tested field, and the spectrum analysis instrument was used to show the spectrum intensity information.

通过CCD获得的待测场图像与没有射流射出时在待测场处放置的坐标纸图像进行比对，测量了实际待测场的大小；利用步进电机带动光纤探针对待测场进行扫描，通过光谱仪获得了待测场的光强分布。

USB portable multi-channel analyzer software on the PC can be achieved on the information collected spectrum analysis, given a spectrum of related data with a high value.

USB便携式多通道分析仪的PC端软件，可以实现对采集信息的频谱分析，并且获得频谱图以及相关数据，具有极高的价值。

Power spectrum function, the use of detailed explanation for the analysis of power spectrum is critical.

详细说明：功率频谱函数的使用详细解释，对于分析功率频谱非常关键。

Then it analyzes the unstable and stable signals by applying Short Term Fourier Transform , Wavelet Packet Auto-Regressive Model Spectrum , the Second Order Cyclostationary Spectrum as well as chaos-fractal theory, extracts the fault features of analysis objects.

采用了短时Fourier变换、小波包AR谱、二阶循环谱方法及混沌分形理论分析了稳态和非稳态振动信号，提取出了分析对象的故障特征。

The frequency shifts and relative intensity configuration of multidegree stokes spectrum were measured and a simple analysis of spectrum characteristics using the concepts of effective scattering cross-section and differences of vibrational e...

测试了两类光纤的多级Stokes谱的频移分布与相对强度分布，并从等效散射截面的相对大小和赈动能级差的相对大小对话的特征进行了初步的分析。目的是在实验研究的基础上探索刊用这两类常用光纤构成光纤拉曼激光器以及利用光纤拉曼散射谱的可能性。

Finally, when regarding the component wave of irregular wave spectrum as regular wave1 and calculate the wave refraction In shallow water by Snell's law, the result is different from the result analysis by directional spectrum.

将波谱中各频率之波浪视为单一规则波，用 Snell定率计算其折射角，其结果与实测结果并不一致，表示方向波谱中各频率主方向无法利用规则波之原理以简化条件的方法求出。

By analyzing the theory of higher order cummulants and higher order spectrum ,the methods of machine fault feature extraction are researched based on higher order spectral analysis by using the character that higher order spectrum can restrain the gauss noise.

在分析高阶累积量与高阶谱的理论基础上，利用高阶谱可以抑制加性高斯噪声的性质，研究了基于高阶谱分析的机械故障特征提取方法，提出了基于双谱估计的齿轮故障诊断的方法。

The modem spectral estimate and higher order spectral analysis are utilized to estimate the spectrum of the atom clock data respectively, and the noise characteristic is analysed by fitting to the spectrum of the atom clock.

利用现代谱估计法和高阶谱法分别估计原子钟数据的功率谱，并对功率谱进行拟合，可分析原子钟的噪声特性。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&