1) avoiding frequency moving
不移频
1.
The avoiding frequency moving algorithm in frequency domain and the concept of full field reference plane were proposed aiming at the sampling process in detect technique by phase approaching of projected grating.
针对投影栅相位法三维检测技术中的抽样问题，提出了不移频处理方法和全场参考面的概念，避免了频域移频所带来的系统误差，克服了对正弦信号抽样的限制条件，并实例验证了新方法的优越性。
2) FSKNRZ Frequency C Shift Keying,No Return to Zero
频移键控，不归零
3) Frequency Shift
频移
1.
Enhancement of magnetoimpedance by magnetic field-induced frequency shift;
利用磁致频移提高磁阻抗效应
2.
The particle property of light and Doppler frequency shift;
光的粒子性与多普勒频移
3.
Experimental study of frequency shift of reflected microwave from laser-induced plasma
激光等离子体对反射波频移影响的实验研究
4) frequency-shift
频移
1.
Based on the nonlinear Schr?dinger coupling equation,through the numerical simulation,investigate the frequency-shift phenomenon of femtsecond pulse in photon crystal fibers.
基于耦合非线性薛定谔方程,通过数值模拟,研究了飞秒脉冲在光子晶体光纤中的频移现象。
5) frequency-shift
移频
1.
Remote sensing image fusion method based on wavelet packet frequency-shift;
基于小波包移频算法的遥感图像融合技术
2.
Design of detector for frequency-shift track signal;
移频轨道信号测试仪的设计
3.
A plan of frequency-shift equipment with microcomputer on railway signal is proposed, which replace the old frequency-shift equipment.
介绍了一种以单片机为核心实现铁路信号移频发送设备电子化的方案 ,用来替代由分离元件构成的移频发送盒 ,从方案设计思想、设备的硬件组成框图和软件设计流程等方面进行了详细的论述 。
6) shifting frequency
移频
1.
Research and Development of the monitor system of shifting frequency signals;
移频信号监测系统的研究与开发
2.
In terms of the disadvantages of the two presently comparatively advanced interval automatic blocking technologies: ZPW-2000A jointless shifting frequency automatic blocking and microcomputer axle counter technology,this paper combines them based on actual projects to complement each other so as to improve the efficiency and safety of rail transport.
针对ZPW-2000A型无绝缘移频和微机计轴这2种目前比较先进的区间自动闭塞技术的弊端,结合工程实际,将二者结合起来,互相弥补不足之处,以改善区间列车的行车效率及安全性。
补充资料：多普勒频移
多普勒频移
物理学术语。又称“多普勒频率”。由多普勒效应引起发射频率与运动目标反射波或散射波信号频率之间的频差。反射体引起的多普勒频移(fd)与发射频率(fs)的关系式为fd=(2Vcosθ)·fs，C为声速，V为反射体的运动速度，θ为反射体运动方向与声束指向之间的夹角。取超声诊断中的典型数据可算得血流。胎心检测中的多普勒频移(fd)均在声频范围之内，因此这类诊断仪器均可采用扬声器来监听。
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