This paper presents calculation of frequency and phase difference of flow signals with spectrum analysis on basics of Fourier transform (DFT).
本文采用基于傅立叶变换(DFT)的频谱分析方法，计算流量信号的频率和相位差。
For uniform time sampling, the level of frequency fluctuation will greatly influence the results of spectrum analysis.
采用等时隙采样方法，频率随机波动的大小则会严重影响谱分析的结果。
With modern spectral estimation algorithm, spectrum analysis on Doppler frequency caused by vehicles radar movement is carried out in DSP chip.
利用现代谱估计的算法，在DSP芯片中对检测车辆雷达运动产生的多普勒频率进行频谱分析。
Applying period frequency spectrum method to analysis of digital seismic recording is discussed in this parer.
论述了周期-频度谱方法在分析数字化地震记录中的应用。
Using frequency spectrum analysis of phase function to calculate its auto power spectrum can reflect its frequency structure.
利用相函数的频谱分析求其自功率谱，可以反映它的频率结构。
Then, make monitoring on ordinary trouble, and frequency spectrum analysis on all kinds of lubricants, and analyses mechanism of happened faults to determine fault causes.
然后对常见故障进行监测，主要对各种润滑油脂进行频谱分析，分析故障发生的机理，确定故障的因果关系。
Using Fourier series, the frequency spectrum analysis was analyzed, and spectrum data of harmony wave less than 19 were calculated.
利用傅里叶级数对其进行了频谱分析，计算了次数小于19次的各次谐波电流均方根值的频谱数据。
The influence of some factors on pressure oscillation is studied by frequency spectrum analysis.
采用频谱分析方法，分析诸因素对压力振动特性的影响。
And it has introduced such several kinds of typical modules as data acquisition, Controller, Frequency spectrum analysis and remote data transmission, etc.
并在此基础上，详细介绍了数据链接、控制器、频谱分析、远程数据传输等几种典型模块。
Spectrum analysis reveals the frequency characteristics of vortex breakdown point oscillation and spiral wave.
频谱分析确定了破裂点脉动和螺旋波的频率特征。
Full spectrum analysis is emphasized in frequency domain analysis.
在频域方面，重点介绍了全谱分析方法。
This paper proposes a frequency spectrum analysis method and a fast algorithm on the interpolation signal with equal samples interval.
本文提出了等间隔加密信号的频谱分析方法和计算加密信号的快速算法。
Analysis of frequency spectrum of human ECG using method of real-time frequency spectrum analysis and filter method is presented.
本文介绍了用实时频谱分析法和滤波器法对人体心电信息作频谱分析。
A method of frequency spectrum analysis is introduced, which be realized by collect the virtual value of appoint frequency vibration through scanning frequency.
介绍了一种用频率扫描抽取指定频率振动分量有效值的方法实现硬件频谱分析的工作原理。
Signal sequence DFT is a signal frequency spectrum sampling sets, therefore DFT can be directly used for analysis of signals frequency spectrum.
信号序列的DFT本身就是信号频谱的采样集，所以DFT可直接用于分析信号的频谱。
Through frequency spectrum analysis, the causes of sudden vibration of the unit are found out, and confirm that has the feature of oil film vibration, and then is eliminated.
对机组突发性振动的成因进行了频谱分析，确认油膜振荡的振动特征并加以消除。
The influences of wall on the frequency response of the bubble and the turbulent intensity of the bubble motion have been analyzed through frequency spectrum analysis method.
通过频谱分析，考察了壁面的存在对空泡频率响应特性和湍强度等方面的影响，并与壁面对固体颗粒运动的影响进行了比较。
Frequency spectrum analysis and the crossing point of voltage are adopted to control the corresponding filter branch switch.
采用了频谱分析法和电压过零点控制相应的滤波支路投入运行。
Through the frequency spectrum analysis of earthquake waves and the dynamic instability regions analysis, the dynamic stability of serial system can be judged under a certain earthquake wave.
通过地震波的频谱分析，结合体系的动力失稳区间分析，可判断在某竖向地震作用下，串联体系并无发生失稳的可能。
The analysis of frequency spectrum is an important link in seismic data processing.
在地震数据处理中，频谱分析是不可缺少的重要环节。
First, it introduces the principle and algorithm of frequency spectrum analysis.
首先讲述了频谱分析的原理以及实现的算法。
Though examples of common signal and sine signal, by the frequency spectrum graph and theoretical analysis, the minimum sample rate of the sampling theorem is made clear.
以一般信号和正弦信号为例，通过理论分析和频谱图示意，对抽样定理中最低抽样率的取值进行了明确的说明。
By the effect analysis of various special processing methods, a set of seismic prediction techniques of malignant leakage such as coherent analysis and frequency spectrum analysis are summarized.
通过多种特殊处理方法效果的分析，总结了一套较为有效的恶性井漏地震预测技术，如相干体分析、频谱分析等。
The SNR of the remote channel can be estimated based on the frequency spectrum analysis, which leads the monitoring of the all parameters of the remote channel.
利用对信号的频域分析，实现对远动通道信噪比估计，从而实现对远动通道中各项参数的全面监控。
Applying Fourier transform frequency spectrum analysis, the equivalent formula and arithmetic for calculating the dielectric loss at power frequency are deduced.
基于这种变频法思想，结合傅里叶变换频谱分析法推导了介质损耗参数的工频等效计算公式和算法。
The single cylinder misfire can be also done by the frequency spectrum analysis of rotating speed fluctuation at both low and high speeds, but it can not be determined which cylinder is misfired.
利用瞬态曲轴转速波动进行时域分析可在低速时诊断出单缸熄火，在高速时由于波动的复杂性就难以做到。
This paper develops a new method to evaluate air velocity in air conditioned room by means of frequency spectrum analysis and correlation analysis based on random process theory, With this method.
本文以随机过程理论为依据，用频谱分析和相关分析为手段，提供了一个评价空调房间气流速度的新方法。
Noise value, noise power, noise voltage, vibration power and amplitude vibration were measured under different cutting parameters of technology and frequency spectrum analysis was also made.
在不同的锯切工艺参数和锯片结构下，测量了噪声值、噪声功率、噪声电压、振动功率和振动幅值，并对其进行频谱分析。
Noise value, noise power, noise voltage, vibration power and amplitude vibration were measured under different cutting parameters of technology and frequency spectrum analysis was also made.
在不同的锯切工艺参数和锯片结构下，测量了噪声值、噪声功率、噪声电压、振动功率和振动幅值，并对其进行频谱分析。
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