Relationship between physical and mechanical parameters and acoustic wave velocity of coal measures rocks 煤系岩石物理力学参数与声波速度之间的关系
A new method using reference layer and adjusting acoustic velocity for calibrating thin reservoir was proposed 提出以参考层为标准,并对声波速度进行微调的薄储层的标定方法。
It works on the principle that the speed of sound changes with temperature , i . e . sound travels faster in warm air than in cold air 它利用声波速度会随温度改变的原理运作,即是声波在暖空气中传送较在冷空气中为快。
It works on the principle that the speed of sound changes with temperature , i . e . sound travels faster in warm air than in cold air 它利用声波速度会随温度改变的原理运作,即是声波在暖空气中传送较在冷空气中为快。
The effects of observing scale on the measurements of acoustical velocity were studied by ray theory and equivalent medium theory 分析了声波频率影响传播速度的机理,给出了不同温度不同压力条件下声波速度随频率变化关系的实例。