1) testing frequency
检测频率
1.
In a certain medium structure,the echo energy transmission coefficient changing with the ultrasonic testing frequency is studied and the maximum magnitude is obtained.
得出了在被检测结构一定的条件下,大的回波能量透射系数对应有一最佳检测频率。
2) frequency detection
频率检测
1.
This interface circuit consists of A/D converter, frequency divider and 'AND' gate circuit,counter,computerfrequency detection and software,ete.
该接口电路包括Ａ／Ｄ转换、分频及＂与＂门电路、计数器电路、计算机频率检测和软件等部分，其特点是测量精度高，速度快，电路简单、可靠，适用于ＴＩＧ焊接馆深振荡频率的检测。
2.
FPGA utilized to design the frequency detection module, this instrument can be used to measure 8-channel frequency at the same time.
该系统利用FPGA设计频率检测系统,可同时检测8个通道的频率,通过对频率的测量可实时连续地监测反应的进行,达到定性定量检测的目的。
3.
To acquire the information of railway binary frequency-shift keying(2FSK)signal s upper and down side frequencies and base low-frequency with high accuracy in real time,a novel frequency detection algorithm compatible with China-made system and France UM71 system was proposed.
为实时高精度获取铁道二进制频移键控信号的上、下边频和基带低频信息,提出一种可兼容国产制式和法国UM71制式的频率检测新方法。
3) Frequency measurement
频率检测
1.
The principle of SAW gas sensor and signal processing circuit is discussed,especially a circuit of frequency measurement is designed.
介绍声表面波(SAW)气体传感器原理及其信号处理电路原理,重点设计了传感器的频率检测电路。
4) Frequency estimation
频率检测
1.
Frequency estimation is one of the key techniques in a DFH communication system.
跳变频率检测是实现DFH的关键技术之一。
5) frequency detector
频率检测器
1.
Simplified version of frequency detector derived from the maximum-likelihood principle;
基于最大似然原理的低复杂度频率检测器
6) frequency tagging
标记频率检测
1.
The steady state visual evoked potential(SSVEP)is widely used in brain computer interface and frequency tagging research.
稳态视觉诱发电位(SSVEP)被广泛用于脑-机接口和脑电的稳态标记频率检测中。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
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