The warning system works by detecting primary waves , which spread from the epicenter of a quake and travel faster than the destructive shear waves 预警系统通过监测从震源发出的纵波来工作的，纵波比具有破坏性的横波传送的更快。
" sound : mechanical disturbance that propagates as a longitudinal wave through a solid , liquid , or gas . a sound wave is generated by a vibrating object . 声音:以纵波形式藉由固体、液体或气体传播的物理扰动。声波是由振动的物体产生。
The application of longitudinal pulse - echo is relatively simple , which can provide information of the thin layers such as the depth , ultrasonic velocity , attenuation etc 纵波脉冲回波法简单易行，能够获得薄层厚度、声速和衰减等信息。
The warning system works by detecting primary waves , which spread from the epicenter of a quake and travel faster than the destructive shear waves 预警系统是根据探测来自于震中的地震纵波来运作的，它的传播速度比破坏性大的横波传播速度要快。
The dispersion curves and simulated dispersion relationship of longitudinal waves without the langmuir wave , the ion sound wave and the ion plasma wave are obtained 得到了除朗缪尔波、离子声波和离子等离子体波外其它纵波的色散曲线和拟合色散关系。
Measurements of physical properties indicate that the rutile - bearing eclogite , due to its very high seismic velocity and density , can produce reflections and gravity anomalies 岩石物性测定表明，金红石榴辉岩的纵波速度极高，会产生明显的反射与重力异常。
In the meantime , fracture developing frequency of fuyu oil pay zone is analyzed and calculated by using ratio of vertical wave velocity “ crocodile factor ” method 同时，运用纵波波速的比值“龟裂系数”方法对扶余油层储层的裂缝发育频率进行了分析、计算。
Methods analyze on different characteristics among transverse wave , vertical wave and surface wave and apply , a slope method to judge the first - arriving - time 方法运用多波分析技术，通过分析超声厚度检测中横波、直达纵波、反射纵波的不同传输特性，提出了斜率法判别反射波的起跳时间。
Three - component ( 3c ) seismic survey with p - wave source and 3c geophones has drawn much attention for its great success in identification of lithologies , fractures , and fluids 摘要纵波震源激发、三分量检波器接收的三分量地震勘探，因在岩性、裂隙和流体识别等方面获得成功，而备受关注。
