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- dual frequency operation 双重频率工作
- If this film series is used in He Ne laser, the dual frequency laser with 5MHz beat will be produced. 此膜系用于氦氖激光器 ,可制出频差为 5 MHz量级的双频激光器。
- Dual frequency and amplitudes vibration system may obtain optimal compaction for different quality and course materials. 振动系统：双频率和双振幅设置，保证了整机在压实不同性质、不同厚度的铺层时，均可达到最佳的压实效果；
- In order to improve target detection performance and anti-stealth ability for modern AEW radar, this paper presents a solution of dual frequency aperture sharing. 为了进一步提高现代机载预警 (AEW)雷达的目标检测及反隐身能力 ,本文提出双频带孔径共用的实现策略。
- The method of measuring deep soil moisture by VHF/UHF dual frequency multiple polarization Synthetic Aperture Radar (SAR) consisting of vector network analyzer is proposed. 该文提出了利用由矢量网络分析仪构造的VHF/UHF双频、多极化合成孔径雷达(SAR)测量深层土壤湿度的方法；
- In order to study the optical feedback characteristics at the dual frequency laser, a birefringent external cavity was studied throughboth theoretical analysis and experiments. 摘要为了研究双频激光器的光回馈特性，采用双折射外腔光回馈的方法，进行了理论分析和实验验证，取得了双频激光器中条纹倍频现象的数据。
- The algorithm was presented as a mathematical description independent of any applications and was used to design a dual frequency grating projection profilometry system. 用独立于任何实际应用的一般形式给出了该算法的数学表述 ,并以此为基础设计了一套双频光栅投影轮廓测量系统。
- This paper introduces a new method for both producing and controlling the frequency difference of a dual frequency laser by using an electromagnetical force which is applied onto the window plate. 提出和研究一种新的方法，即利用电磁铁的电磁力去产生和控制双频激光器的频差。
- plasma radio frequency operation 等离子射频
- Research on Dual Frequency Metal Detector 双频金属探测器的研究
- dual frequency GPS rapid positioning 双频GPS快速定位
- dual frequency induced polarization 双频激电
- dual frequency induced polarization method 双频激电法
- dual frequency liquid crystal gel 双频率液晶胶体材料
- The road opened out into a dual carriageway. 这条路已扩展成了复式车行道。
- simultaneous dual frequency dye laser 同步双频染料激光器
- He varied the transmission frequency. 他变换了无线电传送的频率。
- His dual role as a composer and a conductor made him very busy. 他作曲家和指挥家的双重身份使他非常繁忙。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- The Research and Application of Dual Frequency Signal Generator 程控双频调相信号发生器的研制及应用
