velocity-volume curve

The paper discussed four time-distance curve equation of seismic waves in vertical heterogeneous media; analyzed and compared the errors of ray paths and travel-time curves under the approximation of different velocity function in four layered media models;

本文讨论了四种垂向非均匀介质中地震波的时距曲线方程，分析比较了四类层状介质模型在不同速度函数近似下的射线路径和走时曲线误差；

The frequency width of the fundamental wave depends primarily on the inner diameter of the spiral curve, and with the inner diameter fixed, the phase velocity of the fundamental wave can be adjusted by changing the spiral pitch.

基波的频带宽度主要决定于螺旋线的内径，在内径确定的情况下，可以通过改变螺距对基波的相速度大小进行调节；

In this paper, the optimization computation problem of saving energy for the train travelling on the undulating slope line is discussed. To generate the velocity schema curve of optimization operation for train, a computation model combined local optimization with global optimization is proposed.

讨论了在起伏坡道线路上运行的列车节能操纵的优化计算问题，给出了一种局部优化与全局优化相配合的计算结构，用以生成列车优化操纵的速度模式曲线。

This paper introduces application of surface wave technique in survey to Dawan landslide in Chongqing-Linshui Expressway. It detects slide face with 3 judgment methods such as time domain signal analysis, frequency dispersion curve and wave velocity cloud map.

运用面波技术对渝邻路的大湾滑坡进行了勘察，通过时域信号分析、频散曲线和波速云图3种判定方法查明了滑坡的滑动面。

According to the simulation data of slip velocity and adhesion coefficient, a fuzzy model, RV-TS model, is built to describe the adhesion characteristic curve.

通过仿真实验，采集蠕滑速度和粘着系数的数据，利用RV-TS模型对粘着特性曲线进行模糊建模。