查询词典 cross correlation function

We performed a field experiment by the end of 2004, and based on the data of this experiment, we studied the amplitude degression and corresponding seismic attenuation factor of both single event waveform and cross-correlation function. It is found that, same as single event waveform, cross-correlation function could be used to assess the seismic attenuation.

依据野外现场实验的数据，我们分别以单次和多次激发为源，讨论了事件波形和互相关函数波形的振幅变化及相应的介质品质因子，结果发现，与事件波形一样，互相关函数波形也可以用于计算介质的衰减系数。

The theoretic formulas for cross correlation analysis were derived. 2. According to the frozen model, a transit model and expression formula of flow noise were got. Parameter estimation algorithm was applied in calculating of cross correlation function.

根据凝固模型，建立了流动噪声信号的传递模型，推导出凝固模型时的传递函数的表达式；对两种流动模型情况下，流动噪声的传递进行理论和仿真研究，仿真表明，尽管参数估计法可以消除传感器的涂污现象，但计算量大，速度慢，不能满足实时测量的要求。

Ultrasonic measurement method is a new one. It has many advantages, such as, not changing the profile of the flow and characters of the fluid, non-invasion, no pressure losing and can work under the severe conditions. Collecting the flow noise signals at the upstream and downstream of the pipe, adopting the cross correlation method to analysis signals, calculating the cross correlation function and finding the peak of it, then we can get the transit time.

超声波流量测量具有不改变流动状态与性质、非接触、耐恶劣环境等优点，通过对所采集的上、下游流动噪声信号进行相关分析，其互相关函数的峰值位置所对应的时间，为流体流过上、下游传感器之间的距离所用时间，进而计算出流速和流量。

In the first session the fans vibration on-line monitoring system is realized with VC language, also compile auto power spectrum density function, cross power spectrum density function, autocorrelation function and cross correlation function etc spectral analysis function to carry through simple offline fault diagnosis.

首先用稳定性强、扩展性好的VC++语言开发了通风机振动在线监测系统，并编写了自功率谱密度函数、互功率谱密度函数、自相关函数和互相关函数等频谱分析函数来进行简单的离线故障诊断。

The optimal collocated positions of secondary source with two microphones are studied and the separate of transfer function method that reduce the influence of acoustic feedback are developed based on plane wave transmission theory of sound and concept of transfer function in a duct. After, In order to identify the variation of the signals and find out individual correlation coefficient, cross correlation function analysis between primary noise signal and reference input signal is processed.

本文根据管道声场的平面波传递理论，进行第二声源与两个感测麦克风之间的位置配置研究，配合数位讯号处理的技术，发展出转移函数分离法，以消除声场回授的影响，之后，再将使用和未使用转移函数分离法的讯号个别与主要噪音源讯号做交互相关函数的运算处理，辨识讯号之间的差异，找出个别的相关性系数。

By noticing this, this study used Cross Correlation Function C.C.F.

有鉴於此，本研究以「交叉相关函数Cross Correlation Function； C。

A theory of cross correlation function s is developed in this paper that the cross correlation function s can be expressed as summations of decaying sinusoids as the impulse response functions under white noise excitation.

对互相关函数理论的进一步发展作了详细推导，探索出一条将互相关函数理论同多种经典模态分析方法相结合进行环境激励下模态分析的方法。

By means of signal processing techniques such as the power spectrum function, the auto correlation function and cross correlation function, two kinds of ECG signals when AF does or does not happen were successively analyzed, showing the evident differences between them.

提出了一种简便有效的、由心电图曲线提取QRS -T复合波的新方法，从而获得P波或f波；利用功率谱、自相关、互相关等信号处理技术，对它进行了处理和分析，特别是，比较了未房颤时和发生房颤时的相关信息的显著差别。

According to this theory, hardware was made; the experiments showed different flow case brought different cross correlation function, when the distance of two sensors within 0.5～1. 5 diameter of the pipe, a sharp peak can be detected in the curve of cross correlation function, the frozen model is satisfied.

开展了互相关函数算法的研究，重点研究了极化相关算法，对该算法进行仿真研究；仿真结果与实验处理结果对比，得出只有将流动噪声信号量化为+1、-1时，极化相关算法可以得到准确的峰值位置。

Auto-focusing algorithm based on cross correlation ;2. By means of signal processing techniques such as the power spectrum function, the auto correlation function and cross correlation function, two kinds of ECG signals when AF does or does not happen were successively analyzed, showing the evident differences between them.

提出了一种简便有效的、由心电图曲线提取QRS -T复合波的新方法，从而获得P波或f波；利用功率谱、自相关、互相关等信号处理技术，对它进行了处理和分析，特别是，比较了未房颤时和发生房颤时的相关信息的显著差别。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。