Experiments of rock fracture verified that strong low frequency wave could be received both on the surface of rocks and in the air before the main fracture.
岩石破裂实验证实主破裂前在岩石表面和空气中均收到较强的低频波。
The bridge was actuated by sinusoid sweeping frequency wave, and then the power spectral density differences between the undamaged and damaged bridge were analyzed.
利用正弦扫频波激振钢桥，分析其损伤前后加速度反应功率谱密度的变化。
It is shown that cycle of sedimentary wave is response to each order sequence and the character of high frequency wave is correlated with oil source, reservoir and cap rock.
通过分析沉积波动周期与各级层序持续时间的对应关系，找出了高频沉积波动特征与生储盖之间的对应关系。
The key of this paper is the solution of the second-order double-frequency wave exciting force for a floating body sailing in waves by solving second-order diffraction potential.
本文的关键是通过求解二阶绕射速度势获得三维移动物体的二阶倍频波浪力。
A new study published in the Journal of the American Medical Association has found that the radio frequency waves emitted from mobile phones demonstrably alter brain wave activity.
在美国医学学会期刊上发表的一项最新研究发现手机发射的无线电波能明显地改变脑细胞活动。
When two waves of opposite direction but similar frequency collide, they create a special kind of pressure wave that carries energy to the ocean bottom.
当两方向相反但频率相似的波浪相撞时，会产生一种特殊类型的压力波，而这种压力波会把能量输送到海底。
The frequency of the wave can be changed so that signals do not interfere with one another, allowing more of the spectrum to be used.
同时可以通过改变波段的频率以避免信号间的相互干扰，以便更多的频段能够得到使用。
Sleep is divided into REM and four stages of non-REM; each has a distinct brain wave frequency.
睡眠过程可分为快速眼动阶段和四个非快速眼动阶段，每个阶段的脑波频率都不一样。
The lower the frequency of the wave, the farther it can travel or penetrate physical objects.
波频率越低，其传播距离越远、穿透性越强。
Adjust the frequency, volume, and harmonic content and you can see and hear how the wave changes.
调整频率、体积和谐波内容，你就可以看到和听到波是怎么变化的。
The surface acoustic wave (SAW) sensor can transform the measured object into frequency output, viz a kind of digital signal output.
声表面波(SAW)传感器能将被测量转换成容易检测的频率信号，即一种准数字信号的输出。
The research shows that the design value combines tidal level and wave by composite frequency method is considered to be the reference for design levee elevation.
该研究表明，可采用组合频率法推求的潮位与波浪组合设计值作为制定海堤设计高程的依据。
Based on wave acoustics, the low frequency sound field is analyzed in this paper, and reciprocity is verified both theoretically and experimentally.
文章根据波动声学的观点对房间内的低频段声场做分析，理论和实验都验证了这个结论。
The processing result notes that the method of time frequency analysis may improve stability and liability of extracting Rayleigh wave velocity.
处理结果表明，应用时频分析方法可以提高瑞雷波速提取的稳定性和可靠性。
And the phase velocity of fast wave will decrease exponentially with frequency.
快纵波的相速度随频率的增大以指数形式减小。
A method where the direction of light passing through a crystal is changed using a high frequency sound wave.
在那里光的指示过去的一种方法透过一颗晶片被使用高的频率声波改变。
The computation methods of electromagnetism parameters, electromagnetic wave frequency and medium slice thickness in microwave measuring for composite material were analyzed.
分析了复合材料微波检测中电磁参量、电磁波频率和介质薄片厚度的计算方法。
Ultrashort wave Electrotherapy Machine is an instrument which utilizes high frequency electric energy of ultrashort wave to act on human's organism for treatment.
简介超短波电疗机是利用超短波的高频电能作用于人的肌体进行治疗的仪器。
At last, an intelligentized testing instrument for electric wire high frequency carrier wave channels is developed.
在此基础上，研制开发出了一套智能化电力线高频载波通道测试装置。
The frequency of PWM wave can also adjusted by engineers through choosing the capacitance.
脉宽调制信号的频率可以由用户设置电容的大小来调整。
This paper proclaims similarity of distribution between light strength of monochromic Fraunhofer's single - slit diffraction and square - wave frequency spectrum.
本文揭示了单色光夫琅和费单缝衍射的光强分布与矩形波频谱分布之间的相似性。
It is concluded with the application method of helical spring parameters and the simulation method of high frequency response of suspension in wave theory.
提出了在波动理论下螺旋弹簧多参数的应用方法及悬架高频响应的模拟方法。
The existence of various lacunas in bolt bonding system will cause the acoustic wave energy attenuation, phase aberration and frequency dispersion.
由于锚固体系中有不同大小和程度的缺陷，声波在传播过程中将产生能量衰减、相位突变及频散现象。
The effect of plasma thickness, wave frequency, electron number density distribution on it is almost independent of the wave polarizing direction.
等离子体厚度、入射波频率、电子数密度分布对功率反射系数的影响几乎与波的极化方向无关。
Taken the Earth as material of antenna for receiving gravitational wave, the Earth behaves as a low-frequency gravitational detector.
将地球作接收引力波的天线物质，地球就成为了工作在低频段的引力波探测器。
Proper interface polarization of the material will enlarge the wave absorption frequency and improve the wave absorption performance.
合理利用材料的界面极化，可使材料的吸收频带大大加宽，提高材料的吸波性能。
The frequency of a sound wave, perceived as pitch, is the number of compressions that pass a fixed point per unit time.
声波的频率就是感觉的音调，是单位时间通过定点的压缩数目。
As a device match of the high frequency ground wave radar, the responder 'working is correlating with the radar.
作为高频频地波雷达的配套器件，应答器的工作方式和雷达密切相关。
It introduces a kind of powerful complementary DC and constant voltage power device by using the independent excitation and high frequency PWM wave clipper.
介绍一种利用它激式高频pwm斩波技术完成的大功率直流稳压电源装置。
This paper presents the design of thyristor triggering circuit for a variable speed constant frequency (VSCF) wave energy electricity generating system.
介绍了变速恒频波浪能发电系统的晶闸管触发电路设计。
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