查询词典 echo-location

Discussion of using the backscattering echo to measure turbulent atmosphere structure constant of refractive index.

利用后向散射测量大气湍流强度的探讨。

This paper makes an analysis of the Doppler speed charts of clear weather and the echoes of large-area precipitation. It also singles out the Doppler speed charts of typical wind fields. In addition, this paper analyzes Doppler radars detecting process of the strong convection current weather system. It also conducts a thorough analysis of Doppler echo features of some hazardous weather, such as cell storm and downward storms. Based on this research and analysis, the paper reaches some important conclusions concerning the detecting methods using Doppler radar and the analysis of the information gathered by Doppler radar.

本文通过分析晴空和大面积降水回波的多普勒速度图像，归纳总结出了典型风场的多普勒速度图象，并着重分析了多普勒雷达对严重危害飞行安全的强对流天气系统的探测，特别是深入分析了超级单体风暴、下击暴流等灾害性天气的多普勒回波特征，得出了多普勒雷达对灾害性天气进行探测的方法、雷达资料分析应用等方面许多有益的结论。

Based on the radar dense data of convectional cloud on June 12,2004 in Yongdeng county,choosing two similar convectional clouds as seeding and non-seeding cloud,the remarkable changes of radar echo parameters of the seeding cloud compared with the non-seeding cloud were discussed in this paper,and the rain enhancement effect was evaluated primarily with ground observational rainfall data.The results show that many aspects of the seeding cloud,such as precipitation,life characteristic and vertical characteri...

利用2004年6月12日甘肃省永登县雷达观测对流云的加密资料，选取了2次相似对流云过程分别作为目标云和对比云，探讨了目标云作业前后较对比云雷达回波有关参数的显著变化，并结合地面雨量点观测资料对地面人工增雨作业效果进行了初步分析，结果表明：目标云在降水、生命期特征、回波垂直特征参数变化方面，表现出作业前后较对比云存在明显差异，目标云作业40 m in后地面产生0.6 mm降水，而对比云则从新生发展到减弱消散阶段经历较短的时间(30 m in)，地面并无降水产生，从而推断本次人工增雨达到了一定的预计效果。

Especially, the technology of Automatic Gain Control and signal processing are studied which are key factors working on the performance of the receiver. Based on analyzing the theory of automatic Gain Control, operational amplifiers 0P37 and logarithmic D/Aconverter AD7111A are used to design variable gain amplifiers which can be controlled numerally, A/D convector LTC1405 is Used to test the echo, Complex Programmable Logic device is used for controller, and an arithmetic is designed for automatic Gain Control which is simulated and analyzed in order to test its feasibility.

本文在分析自动增益控制AGC原理的基础上，采用集成运放OP37和数控增益衰减器AD7111A设计可数字控制的可变增益运放模块；采用高速A／D转换器LTC1405作为回波信号检测模块；采用复杂可编程逻辑器件CPLD作为核心控制模块，构成数字自动增益控制电路，并设计粗调和细调步进控制相结合的算法，对回波信号的增益进行精确而快速的调节控制，使回波信号振幅快速稳定在设计指标范围内，利于接收机后续信号处理电路对回波信号作进一步的处理。

They were so cosy and intelligent, and my belief in them seemed to echo their belief in me.

他们是那么可亲、人又聪明，我对他们的信任就如同他们对我的信任。

In the era, the shadow of freedom can be seen everywhere, and equality and justice are the pursuit. The molding of the 20th century's great crankle brings various feelings of ending day, gray eidolon and counter-tide of living. The theoretical echo and new tide are also thundering.

其中，自由的迷影随处可见，公平和正义始终是基本的追求。20世纪晚期的历史巨大弯道的成型，带动了各种末世之感、灰色幻像和生活中的阵阵逆潮，理论的回波与新潮也异常激涌。

The molding of the 20th century's great crankle brings various feelings of ending day, gray eidolon and counter-tide of living. The theoretical echo and new tide are also thundering. The contemporary sociology realizes the importance of practice.

其中，自由的迷影随处可见，公平和正义始终是基本的追求。20世纪晚期的历史巨大弯道的成型，带动了各种末世之感、灰色幻像和生活中的阵阵逆潮，理论的回波与新潮也异常激涌。

I do hope that the music of a creek from me will echo the deep of valley of you.

我真诚地希望：我所带来的音乐能唤醒你内心深处的感觉。

The echo of the explosion damped itself in the air.

爆炸的回声还萦回在空中。

At high tide of night, when the first breath of dawn came upon the wind, the forerunner, he who calls himself echo to a voice yet unheard, left his bed-chamber and ascended to the roof of his house.

在高潮的夜晚，当第一呼气的曙光来到风，先行者，他自称是谁回声到一个前所未闻的声音，然而，离开床商会和跻身屋顶他的房子。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。