1) frequency content
频率含量;频谱
2) frequency content
频率含量，频谱
3) frequency-wavenumber energy spectra
频率波数能量谱
1.
However, less attention has been paid to the frequency-wavenumber energy spectra, which are important to the temporal statistics in turbulence and aeroacoustics.
对均匀各向同性湍流的频率波数能量谱进行了初步研究,得出均匀各向同性湍流中能量随时间、空间尺度分布的解析表达式,并运用直接数值模拟的方法对理论预测进行验证。
4) vibrating frequency spectrum
频率谱图
5) frequency spectrum
频率谱
1.
Internal friction (IF) frequency spectra of polycrystalline copper, nano-structured copper and single crystal copper specimens were measured by an internal friction frequency spectrum apparatus.
用内耗频率谱仪测量了多晶铜、纳米晶铜和单晶铜试样的内耗频率谱,在170,320以及490 Hz附近观测到3个明 显的共振吸收频率峰。
2.
Based on frequency spectrum and characteristic frequency analytic technique,measurement of vibration parameter of a water pump is carried out.
基于频率谱及特征频率分析技术,对某型水泵各测点进行振动参数的测量,根据TAM保养协会标准并结合实测数据,评定其健康状况的等级,并通过原因分析,制定改善的措施。
3.
The measured results of frequency spectrum are compared with those calculated by sequency spectral method under different water depths and slope bottoms.
为研究变浅作用下的非线性海浪，本文利用并矢相关谱估计方法，设计并进行了多种强度下，由深水传入近岸浪变浅作用下，列率谱和频率谱随水深和坡度变化的实验比较研究。
6) spectral efficiency
频谱效率
1.
Effects of rolloff factor on resistance to time delay spread and spectral efficiency of adaptive QAM;
滚降系数对自适应QAM的抗时延扩展性能和频谱效率的影响
2.
Asymptotic spectral efficiency of the multicarrier code division multiple access;
多载波码分多址的渐进频谱效率
3.
Improvement in spectral efficiency of multiwavelength optical CDMA network;
多波长OCDMA系统频谱效率的改善
补充资料：波的能量
见波。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条