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- The heterodyning principle is well known in nonlinear optics as difference frequency generation (DFG). 在非线性光学领域,超外差原理就是著名的差频产生(DFG)技术。
- All-optical wavelength conversion (AOWC) is mainly implemented by using four nonlinear effects: cross gain modulation (XGM), cross phase modulation (XPM), four wave mixing (FWM), and difference frequency generation (DFG). 实现全光波长转换主要利用四种非线性效应 :交叉增益调制 (XGM)、交叉相位调制 (XPM)、四波混频 (FWM)和差频 (DFG)效应。
- Different frequency resolution in human hear. 人耳对不同频率的分别率是不同的。
- A sufficient condition for the permanence of the three-dimension nonlinear difference system is obtained, which generalizes some known result. 得到了三维非线性差分系统持久性的一个充分条件;推广了已有文献中的部分结果.
- Two different frequency, and there is no resonance. 双方不同频，因此也就无法共振。
- The general expressions of equal-power high-power nonlinear difference squeezing in the multimode state light field with any amount of states superposing was given. 给出了任意多态叠加多模叠加态光场的广义非线性等幂次高次差压缩的一般表达式。
- Results The general expressions of equal-power high-power nonlinear difference squeezing in the multimode state light field with any amount of states superposing was given. 结果给出了任意多态叠加多模叠加态光场的广义非线性等幂次高次差压缩的一般表达式。
- Each of these pieces is a sine wave with a different frequency. 每个小部分是有着不同频率的正弦波。
- Aim To find out the squeezing conditions theoretically and the properties of equal-power nonlinear difference squeezing in multimode radiation field with any amount of states superposing studied. 摘要目的研究任意多态叠加多模叠加态光场的广义非线性等幂次差压缩特性，从理论上导出该光场呈现高次差压缩的条件。
- The magnitude and phase of the composed balancing vector are adjusted by means of controlling difference frequency of current in inner stator windings. 通过控制内定子绕组电流频差信号以实现对平衡矢量幅值与相位的在线调节。
- By change some pellucid parameters, this model can work in different frequency. 通过一些直观的参数设置，可使线圈模型适用于不同的频率范围。
- Radio Beijing broadcasts on a dozen different frequencies. 北京电台以十几种不同的频率进行广播。
- Various Buddha's names that teem in the sutra represent different frequency. 其内文均为各佛菩萨的名号，亦代表著各种不同的频率。
- higher order nonlinear difference equations 高阶非线性差分方程组
- higher order nonlinear difference equation 高阶非线性差分方程
- To cause beating by superposing waves of different frequencies. 振动叠加不同频率的波以产生拍差，拍音
- nonautonomous nonlinear difference equations 非自治非线性差分方程
- Various wavelength conversion (WC) techniques are introduced, and two are chosen to be used in all optical transparent networks. These are four wave mixing (FWM) and difference frequency generation (DFG). 该文首先简单介绍各种波长变换技术;对比它们的优缺点;选出两种能用于未来全光透明网络中的波长变换技术:四波混频波长变换技术和差频波长变换技术.
- nonlinear difference differential mKdV equation 非线性差分微分mKdV方程
- They tested his hearing with pure tones of different frequencies. 他们用不同频率的纯音测试她的听力。
