1) coherent phase detecting
相干相位检测
2) correlation detection
相干检测
1.
According to the principle of correlation detection,an automatic measurement system for extinction ratio of polarizer consisted of monochromator and DSP Lock-in amplifier and compurer is designed not only to eliminate the influence on measurement accuracy caused by drift of intensity of light source but also to obatain approximate extinction spectrum.
基于相干检测原理设计了一套由单色仪、数字锁相放大器和计算机联合使用的透射式偏光镜消光比智能化测试实验系统,采用双频双光路分光单探测器接收锁相放大器分离信号比对法进行源补偿测量,克服了光源光强漂移所带来的影响;实现了可见光区消光比的精确自动测量,而且可以测得近似的消光光谱。
3) coherent detection
相干检测
1.
Effect of modulation frequency Jitter on coherent detection and its elimination algorithm;
调制频率抖动对相干检测的影响及消除算法(英文)
2.
Differential detection and coherent detection based on space-time block codes;
基于空时分组码的差分检测与相干检测
3.
The OSCM system based on coherent detection in atmospheric optical communication is designed and the signal transmission performance of this system is simulated and analyzed in this paper.
设计了应用于大气光通信的OSCM(光微波副载波复用)相干检测系统,对系统的信号传输性能进行了仿真分析,在理论上验证了该方案误码率低,可同时传输多路信号,适用于大气信道。
4) phase detecting
相位检测
1.
The phase detecting is very important in complex resistivity well logging technology.
复电阻率相位检测技术是目前复电阻率测井技术发展的方向。
5) Phase detection
位相检测
6) phase measurement
相位检测
1.
Application of FFT to phase measurement of track voltage;
快速傅立叶变换在轨道电压相位检测中的应用
2.
Based on the study of the arc harmonics measurement, a method called divided-error is introduced to improve the phase measurement accuracy in this paper.
根据研究"电弧炉对电网的影响机理及对策"时相位检测精度的问题,提出了提高谐波相位检测精度的解决方法。
补充资料：相干散射和非相干散射
再辐射的光量子频率和被吸收的光量子频率准确相等的散射过程称为相干散射。在相干散射的情况下，源函数准确地等于平均辐射强度。再辐射的光量子频率和被吸收的光量子频率不相等的散射过程称为非相干散射。在天体物理中，存在一系列因素使散射过程成为非相干散射。主要的因素是：原子的能级有一定的宽度、原子的热运动和湍动以及压力效应等。对于非相干散射，源函数是相当复杂的。
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