查询词典 frequency analysis

Therefore, the choice of single mode in the examination and the frequency-thick band of mode has been given a particular illumination separately in the paper, following a relative numerical simulation. And a multi-cyclical sine signal modulated by Hanning window is used to simulate the excitation wave, and then an inspected ring of nodes is established to receive the echo, finally how the length of the circumferential cracks, the width of the axial cracks and the degree of the thickness-reduce effect the result is explained through the analysis of the result, further more, the reflection factor in the defect has been calculated.

因此，本文也就单一检测模态的选择以及模态频厚积段的选择分别予以了阐述，并有针对性的进行了数值计算：应用Hanning窗调制的多周期正弦波模拟单音频激励信号，并设置监测质点环接收回波，通过分析说明了管道的周向裂纹、轴向裂纹以及点蚀缺陷对缺陷回波所产生的影响，并进一步计算了缺陷处的反射系数。

Design and error analysis of 1 064 nm,532 nm frequency doubled antireflection coating for LBO［J］.

LBO 晶体上1 064 nm，532 nm二倍频增透膜的设计及误差分析［J］。

The design and error analysis of 1064 nm,532 nm frequency-doubled antirefelcetion coating for LBO .

LBO晶体上1053 nm，532 nm二倍频增透膜的设计与误差分析。

Design and error analysis of 1 064 nm,532 nm frequency-doubled antireflection coating for LBO.

LBO晶体上1 064 nm，532 nm二倍频增透膜的设计及误差分析。

The lead-in voltage and out-of-line voltage of switchbox are detected and converted into frequency signal. The arc voltage signal can be obtained by measuring the two signals. The arc voltage signal and arc light intensity signal are sent to the advanced single-chip microcom puter, PIC16F877, to do synthetic analysis – judgment.

提取配电箱的进线电压和出线电压，分别转换成频率信号进行比较，获得电弧电压信号，并将其和弧光信号一起送入性能先进的PIC16F877单片机，做综合分析判断。

In later following experimental researches performed, this paper summarized the approaches applied to the time-domain and frequency-domain analysis of dynamic pressure and dynamic chemiluminescent density.

然后总结了燃烧室中热声振荡的相关判据和驱动和阻尼机理以及理论和模型分析方法。并阐述了本文的实验研究应用的动态压力和动态化学发光强度等动态数据的时域和频域分析方法。

The method of wavelet packets decompositions originating from wavelet transform is more accurate in signal analysis, with the predominance of analyzing details information of high frequency.

小波包分解是从小波变换延伸而来的一种更精细的信号分析算法，具有分析高频特征信息的优势。

A computer-processed log that applies a statistical analysis of frequency crossplots to complex lithologies.

复杂岩性地层的计算机处理测井解释程序，程序采用了频率交会图的统计分析技术。

A practical analysis method of low frequency oscillations for large power systems is presented.

提出一种实用的大规模交直流电力系统低频振荡分析方法，该方法结合

It is therefore the purpose of this paper to offer a detailed analysis on the frequency stability of transistor feedback oscillators.

本文将对晶体管反馈振荡器的频率稳定性能作比较详细的研讨。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。