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- The Application of Dual Frequency Echo Sounder in the Substance Classification of Seabed Supper Structure 双频测深仪在海底浅层物质分类中的应用
- dual frequency echo sounder 双频测深仪
- A device used underwater to produce pulses of sound, as for an echo sounder. 声脉冲发送器置于水下产生声脉冲的装置，如回音器中的装置
- Inspection installation and water tight transducer of echo sounder on berth. 测深仪的换能器船台安装和水密性检查。
- A device used underwater to produce pulses of sound,as for an echo sounder. 声脉冲发送器置于水下产生声脉冲的装置，如回音器中的装置。
- Inspection installation and water tightness transducer of echo sounder on berth. 测深仪换能器船台安装和水密性检查。
- In bathymetric survey, the recorded seabed is distorted due to the beam-width of the echo sounder. 摘要在海底地形测量中，由于波束角效应导致探测的海底地形存在失真。
- 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。
- The beam angle can badly influence the inspection ability of the single beam echo sounder. 波束角会严重影响单波束对海底管道的探测能力。
- 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；
- The distance simulation circuit for a wireless fuse target video frequency echo simulator has been designed based on FPGA and the digitally programmable delay generator. 针对某伪码调相PD引信点目标视频回波模拟器的要求,提出了基于现场可编程门阵列(FPGA)与片外精密数控可编程延时线两级延时技术的引信点目标视频回波模拟器距离模拟电路的设计及实现方案。
- 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 occurrence and development of GPS RTK technology with digital echo sounder creates a foundation for digital automated waterway dredging engineering quality inspection. 摘要全球定位系统RTK技术和数字测深集成技术的出现和发展，为航道疏浚工程质量检验的数字化自动化提供了基础。
- 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 wall can optimally absorb the echoing sound. 这墙能极有效地吸收回声。
- 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。
- The distance simulation circuit for a wireless fusee target video frequency echo simulator has been designed based on TDC for the precision testing of the close quarters blind-area. 摘要 由于引信近距盲区精确测试的需要，设计了引信点目标视频回波模拟器距离模拟电路。
- Function test of echo sounder. 测深仪效用试验。
- Echo sounding devices were early used in making maps of the ocean floor. 讲的是回声定位仪器最早用于绘制海底地图。很容易找到对应的答案。
