Investigated polarization interference between atoms of different velocities in dressed - atom two - photon resonant nondegenerate four - wave mixing 研究缀饰原子双光子非简并四波混频中由多普勒效应产生的偏振干涉。
The digital if signal is converted to zero if by digital down converter , then taken fft spectrum analysis with hann window in advance 数字中频信号首先通过数字混频下变频至零中频，然后作加海窗的复fft谱分析。
Therefore , the spatial resolution afforded by the optics ca n ' t be fully utilized in such imaging systems 超分辨率图像复原技术可以利用视频图像序列中各帧之间的冗余信息，重构出超分辨率图像，消除和降低混频效应。
The enterprise of u . d . , s . r . o . offers you storage , mixtures and manufacture as well as the further vegetable and soups 是一家高级企业，该企业针对客户需求制造专门的插入、储藏,混频、混合、整理,蔬菜,轮胎成型、服装批量生产,汤液体。
The key point of structure design and accuracy analysis in precision mount which is needed in the procession to obtain second and third harmonics generation is introduced 介绍了实现倍频和混频过程所需的精密调整架的结构设计要点及其精度分析。
Many nonlinear optical effects such as spm , xpm and fwm play important roles in the evolutions of optical pulses in the loop mirrors 利用构成非线性环的光纤中发生的不同非线性效应(自相位调制、交叉相位调制与四波混频效应) ，可以实现超短脉冲的非线性光开关特性。
It is very important to the wavelength conversion through fwm . the result shows that a shorter fiber is necessary to get an enough efficiency when employing high optical energy 结果表明相位调制对四波混频的效率会有影响，用四波混频进行波长转换时该情况有很大作用。
Conventional ddc down - converts digitally by digital mixing , filtering , and decimating ; on condition of high - speed a / d converters , the commercial ddc is no longer applicable 传统的ddc通过数字混频、滤波、抽取实现数字下变频，在高速a d和电子侦察环境条件下商用ddc不能使用。
The analysis of harmonic balance and transpositional matrix is used to get the formula of conversion loss in the later according to equivalent circuit design the whole circuit 详细介绍了二极管的混频原理,以及常见的二极管混频器电路的实现形式。采用谐波平衡分析方法和变换矩阵分析方法,推导出平衡混频器变频损耗公式。
It is proved by experimental results that the technical specifications can be well reached by properly designing circuits , skillfully assigning n value of loop by means of mixer , using simulation method 通过实验证明,合理设计电路、结合混频手段、巧妙的分配环路n值,并利用仿真手段,能很好地实现课题所要求的技术指标。
