direct sound wave是什么意思

网络释义

用法例句

Effects of direct sound and one time reflection of railway noise on residential quarter were mainly considered, and model for prediction of attenuation of railway noise in residential quarter was given in the paper.

主要考虑铁路噪声的直达声和一次反射声对住宅小区的影响 ,建立了铁路沿线城市住宅区列车噪声衰减的理论模型 ,计算分析了铁路噪声对建筑群纵深的影响 ,并与实测值进行比较 ,验证了模型的可靠性 。

When we use it to test the underwater target strength,one problem is how to discriminate the direct sound of the source with the echo reflected from the target,finding the target character quickly.

当利用它进行水下目标强度测试时,一个很实际的问题就是怎样区分声源直达声和目标反射回声,快速找出目标特性。

Thus in common receiving gathers,firstly calculate the polarization coefficient of direct wave for each trace,and then use the resulted coefficients as weights to determine the main polarization direction in detector coordinates via weighted least square metho.

因而,可以在共检波点道集中,首先计算各道直达波的偏振系数,再用偏振系数作为权系数,采用加权最小二乘算法直接计算出检波器坐标中的主偏振方向,以此准确估算出检波器方位。

This paper firstly established emulation mode of the transmission of outer radiant point signal,therefore calculated intensity of direct wave signal and multipath signal,and compared it with practical measure value.

首先建立了外源信号传播的仿真模型,由此推算出直达波信号与多径反射信号的强度,并与实际测量情况进行了比较验证,然后将直达波强度与多径信号强度作了对比分析,得出直达波的存在对布站的影响,从而为接收站的布置问题提供了参考依据。

Interference of acoustic direct wave coming from sound source makes accurate determination of underground conditions with acoustic waves difficult.

在浅地层地下物体的声波探测中，沿地表层传播的声直达波干扰是影响探测结果的主要因素之一。

This paper studies the method of restraining direct-arrival wave of passive radar based on outside radiation source,which adopts the adaptive technique of phased array radar,generates zero falling in the direction of direct-arrive wave to restrain the jamming by adjusting weighted vector.

对基于外辐射源的无源雷达系统中的直达波抑制方法进行了研究,采用相控阵雷达的自适应技术,通过加权向量调整从而在直达波干扰方向上产生零陷来抑制其干扰。

The factor to affect the performance of the passive radar is as following:direct-path-wave,multi-path effect,co-channel interference,etc.

影响外辐射源雷达性能的主要因素有直达波信号对消、多径信号对消、同频干扰的消除等,在系统设计中应进行针对性设计。

When FM broadcast transmitter is regarded as extra irradiation source,multipath interference will lead to mismatch between the direct-path-wave reference signal and the echo reflected from target during matching filter,and then it will degrade the performance of moving target detection.

利用民用FM广播信号为无源雷达的外辐射源时,由于信号在空间传输时产生严重的多径干扰,导致接收站获取的直达波参考信号与目标反射的回波在后继匹配滤波时出现失配现象,严重影响了雷达的目标检测性能。

Rejection of direct blast interference based on adaptive signal processing

自适应信号处理抗双基地直达声干扰仿真研究

The debris falling back to earth may generate additional direct and surface-wave noise.

碎石落回地面可产生附加的直达波和面波噪声。

A COMPARISON OF THE WIND MEASUREMENT BY A DOPPLER SODAR AND THE IN-SITUMEASUREMENTS

多普勒声雷达测风与直接测量仪器的观测比较

So in that moment, that instant, the cry shot right up to the Brahma worlds.

就在那个时刻、那个瞬间，呼声直达梵天界。

A blind source separation approach to active sonar’s direct path interference suppression

主动声纳直达波干扰抑制的盲分离算法

The video signal is directed to the CRT through a sound trap which eliminates the sound-carrier frequency.

视频信号通过声音陷波电路，消除声音载波频率，直达CRT。

A moment later, the window-shutter was closed, and the sound of a bar of iron which was placed against it was audible outside.

过一会儿，板窗也关上了，一阵上铁门的声音直达外面。

Direct laryngoscopy revealed narrowing of the glottis with diffuse ulcerative necrotic tissue.

以直达式喉镜发现声门狭窄与广泛性溃疡坏死组识。

"The council (of ministers) appeals to you to put off the adoption of the 1982 budget until an agreement can be found..." it said.

信中声称，“部长会议要求推迟通过1982年预算，直至达成一项协议为止。”

Normal incidence

垂直入射(亦见直射声束)

Talk to the VIPs directly by means of audible signals. Avoid using eye contact, gesture, etc. to convey your message.

应直接与他交谈，以声音向他表达，但切忌使用眼神，动作等来传达你的讯息。

That express bus goes direct to the airport.

这个直达车直接到机

The busmen have stated that the strike will continue until general agreement is reached about pay and working conditions.

司机们声言，不达成关于工资、工作条件的全面协议，罢工就一直进行下去。

"US President George W. Bush said, without directly stating that Saddam should be put to death. "

虽然没有直接声名萨达姆应该被处死,美国总统布什还是措辞严厉的说:

The noise was simply terrible.

吵闹声简直可怕极了。

My voice almost broke.

我的声音都发直了。

He Blinked at the report of the gun

枪声惊得他直眨眼。

nominal cartridge diameter of microphone

传声器极头公称直径