1) dominant frequency
主频段
1.
We studied the characteristics of dominant frequency of infinite horizontal cylinder in compensated factor and quve the linear.
根据余弦变换的基本性质,推导了二度、三度体异常向上延拓余弦变换谱理论公式,采用离散余弦变换实现了该法的数值计算;研究了无限长水平圆柱体的补偿因子中主频段的特性,给出了二度体的线性补偿方式;补偿后的理论模型异常向上延拓具有较高的计算精度,除边部几个数据因数据的离散和有限截断使误差较大外(最大误差为6。
2) main frequency
主频
1.
At the same time, the changes of main frequency, frequency band and quality factor with the variations of gas saturation are analyzed.
用实验方法探讨了气驱水过程中低孔隙度低渗透率砂岩的纵横波速度、纵横波速比、弹性模量等参数随不同含气饱和度的变化 ;同时在频率域内探讨了纵横波的主频、带宽、品质因素Q随不同含气饱和度的变化。
2.
This paper describes the variation of wave velocity,amplitude of the intitial wave and main frequency when ultrasonic pulses transfers through fresh cement paste,and analyses the relation between the variation and the development of the structure of fresh cement paste.
论述了超声波在新拌水泥浆体中传播时波速、首波幅值、主频的变化 ,并分析了这些变化与新拌水泥浆体结构发展之间的关系。
3.
There are also no remarkable differences in main frequency and main frequency absolute power.
比较飞碟多向运动员重大比赛前后安静状态下的脑电绝对功率值,结果发现:运动员赛前与赛后各脑区δ频段、θ频段、α频段、β频段的绝对功率及各脑区主频和主频绝对功率无显著性差异。
3) Principal frequency
主频
1.
amplitude consistency, principal frequency, effective frequency belt width and the consistency of high-low energy and the content of the same reflection consistency and response processing methods are discussed.
论述了高分辨率地震资料处理中的振幅一致性、主频、有效频带宽度及高低频能量一致性和同一反射一致性的含义及相应的处理方法。
4) dominant frequency
主频
1.
The dominant frequency, amplitude-attenuation and resolution of excited signal and reflected signal.;
激发信号与反射信号的主频、振幅衰减及分辨率
2.
Yun Mei-hou has questioned about the argument of close relationship between resolution and S/N ratio expounded in my book "Road toward Precious Exploration" and considered that seismic resolution is only relative to dominant frequency and irrelative to S/N ratio of seismic waves.
云美厚曾对笔者专著《走向精确勘探的道路》一书中阐述关于分辨率与信噪比有密切关系的论点提出质疑,他认定地震分辨率只与地震波的主频有关,而与地震波的信噪比无关。
3.
The issues of present seismic wavelet frequency caused by different concepts, such as apparent frequency, dominant frequency, peak frequency and centroid frequency, etc.
针对目前地震子波频率由于定义方式出现的各种概念(视频率、主频、峰值频率、中心频率等)以及理解上出现的偏差等问题,首先从时间域定义和频率域定义2个方面进行了归纳和总结, 并在此基础上对3种常用地震子波(Ricker子波,Zinc子波,正弦指数衰减子波)进行了分析和研究,得出视频率与主频概念一致,但不同地震子波的峰值频率、中心频率和视频率(或主频)之间并不完全一致的结论;而对于实际地震资料,将峰值频率近似看作地震子波的主频是可以的,但在地震子波已知的情形下这样做是不恰当的,甚至可能会得出错误的结论和认识。
5) Instantaneous dominant frequency
瞬时主频
6) main frequency
主频率
1.
It is discovered that blasting vibration main frequency is low and blasting vibration duration is near to 3 s,so the blasting is safety in Heidaigou coal mine.
通过对爆破地震频谱的分析,发现爆破振动主频率较低,爆破地震持续时间接近3 s,并指出黑岱沟露天煤矿在此条件下爆破是安全的。
2.
The results show that the main frequency of the acoustic signal increases with the shape change of the ripple spring located under the slot wedge.
研究表明在波纹板的弹性范围内,随着波纹板形变量的加大,测得的声信号能量谱图中主频率值逐渐增加。
3.
： By fixing view point, the study is conducted to analyse the me ch anism of FFT(Fast Fourier Transformation) spectrum leakage when rectangular wa v e of single frequency composition is added, and the general rule of influence o f main frequency upon leakage when its position is different in FFT spectrum.
通过固定观察点而让主频率移动的方法，研究了单一频率成分的波形在加矩 形 窗函数时 FFT(Fast Fourier Transformation)谱泄漏的机理和主频率在 FFT谱上的不同 位 置对泄漏产生影响的一般规律，导出了计算幅值、频率和相位精确值的公式。
参考词条
补充资料：频段
1.把无线电波按频率不同而分成的段，例如低频﹑中频﹑高频﹑超高频。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。