acoustic ratio 中文意思是什麼
acoustic ratio
解釋
聲比-
The following results were found, i. e., the water ratio affects obviously the acoustic wave velocity of rock sample ; the wave velocity is higher in saturated rock samples than in unsaturated ones ; and it decreases gradually with the strain of samples during uniaxial compression ; and also with the lengthening holding time at 160 ; when heating the samples the acoustic wave velocity increases slightly in initial stage and comes to the peak value at 60, then decreases gradually with increasing temperature ; meantime, there is a certain temperature effect on rock samples size
實驗發現含水率對波速影響比較大，飽和巖樣的聲波傳播速度高於不飽和巖樣的聲波傳播速度；人工預制裂紋對聲波傳播速度影響不大；單軸壓縮條件下，聲波傳播速度隨應變增加逐漸降低；在同一溫度（ 160 ）下，波速隨保溫時間的增加而逐漸降低；在對巖樣逐漸加熱情況下，初始加熱階段波速略有升高，當溫度達到60時，巖樣波速達到峰值，之後隨著溫度繼續升高其波速逐漸下降；波速隨溫度變化具有一定的尺寸效應。 -
Performance - price ratio is much higher than surface acoustic wave and monitors
性能價格比遠高於分別購買表面聲波屏和顯示器 -
A three - dimensional - acoustic doppler velocimeter is used to measure the velocity components of the flow field in all three coordinate directions for different discharge and measurement site. the influence of measurement site and the depth / vegetation height ratio on the measured velocity profile and turbulence intensity and the renolds stress is analyzed. the characteristics of the measured velocity distributions and the results of the previous investigators are used to select an analytical expression for the shape of the velocity profile
利用三維超聲波多普勒流速儀（ adv ）量測不同位置、不同流量下的瞬時流場。分析了測點位置和水深與植被高度比對時均流速分佈的影響。本文還給出了種樹段紊動強度及雷諾應力的垂線分佈。 -
In addition, the effects of stack structure and material property on the performance of the thermo - acoustic engine in terms of the critical temperature ratio were examined
結果表明，合理設計板疊的結構和合理選擇板疊的材料，可以使得系統在較低的溫度下起振。 -
The effects of water ratio, crack, strain and temperature on the acoustic wave velocity in granite samples were investigated systematically by means of tico, an ultrasonic concrete tester
摘要應用超聲波混凝土測試儀（ tico ） ，系統研究了含水率、裂紋、應力和溫度對花崗巖內波速傳播的影響。 -
Therefore, linear phased array can he used to improve quality of well - logging data and enhance both signal - to - noise ratio and exploring capacity of acoustic well - logging radically
本文工作為相控線陣聲波輻射器在石油勘探中的應用提供了理論依據。 -
With nd : yag laser, the surface acoustic wave pulses were generated on the sample of aluminium and silicon. well - defined waveforms have been acquired. the results show this technique have advantages such as high frequency responding, high signal - to - noise ratio
對nd : yag固體激光器在鋁和硅材表面激發的聲表面波脈沖進行了系統的實驗測試，結果得到了良好的波形，此法相對于其他光學方法具有頻響高，靈敏度高，線性較好的諸多優點。
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