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。
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。
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。
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
Asymptotic spectral efficiency of the multicarrier code division multiple access;
多载波码分多址的渐进频谱效率
Improvement in spectral efficiency of multiwavelength optical CDMA network;
多波长OCDMA系统频谱效率的改善
To reduce the computational complexity and storage of the line spectrum frequency(LSF) parameters quantizer a predictive multi-stage split vector quantizer is designed to quantize LSF parameters by using the correlation of LSF parameters between frames and inter frames.
为了降低线谱频率(LSF)参数矢量量化器的搜索复杂度和码字存储单元,利用LSF参数的帧内和帧间相关性,设计了一种LSF参数的预测式多级分裂矢量量化器。
double frequency spectral density functio
双重频率谱密度函数
Compared Commonly Used Frequency Spectrum Parameter of Complex Impedance Model
常用的复电阻率频率谱参数模型对比
Frequency spectrum element, carrier frequency. Frequency type can be specified.
频谱元件，载波频率。可指定频率类型。
high resolution low frequency spectrum analyzer
高分辨率低频谱分析仪
high resolution LF frequency spectrum analyzer
高分辨率低频频谱分析仪
The Research of Freqency Assignment in Frequency Spectrum Management System;
电磁频谱管理中的频率分配技术研究
Analysis on the Spectral and Frequency-Transform Characteristics of 1~(st) and 2~(nd) Order FM Screening
一阶及二阶调频加网频谱特性及频率传递分析
This relation between the frequency and the field spectra was noted experimentally.
实验上已经发现频率和场频谱之间的这种关系。
Modulation-Free Laser Frequency Locking by AOM Shifted Cesium Sub-Doppler Spectra
声光偏频亚多普勒光谱无调制激光频率锁定
Mechanism of Biomechanic of Spectrum Main peak of Systolic Murmur;
心脏收缩期杂音频谱主峰频率的生物力学机理
Analysis of the spurious spectrums in direct digital frequency synthesizers
直接数字频率合成技术杂散信号频谱性能分析
frequency-programmed microwave spectrometer
频率程序控制微波光谱仪
The electromagnetic spectrum covers an enormous range of frequencies and energies.
电磁波谱包括极大的频率和能量范围。
real-time high-resolution spectrum analyzer
实时高分辨率频谱分析仪
Analysis of Frequency/Wavenumber Spectrum on Vibration of Hull
频率／波数谱在壳体振动分析中的应用
Spectrum Sensing Optimization Based on Detection and Power Constraints
基于检测和功率受限的频谱感知优化
Cutoff Frequencies Analysis of Bichromatic High-Order Harmonic Generation Spectra
双色激光脉冲谐波谱的截止频率分析
A Method of Instantaneous Frequency Domain Filtering Based on HHT
基于希尔伯特谱的瞬时频率滤波方法