水下超聲波 的英文怎麼說

中文拼音 [shuǐxiàchāoshēngbō]
水下超聲波 英文
under-water ultrasound
  • 水 : 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
  • 下 : 下動詞1. （用在動詞后,表示由高處到低處） 2. （用在動詞后, 表示有空間, 能容納） 3. （用在動詞后, 表示動作的完成或結果）
  • 超 : Ⅰ動詞1 （越過; 高出） exceed; surpass; overtake 2 （在某個范圍以外; 不受限制） transcend; go beyo...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  1. Changes of the longitudinal and transversal wave velocities in different directions and the rock velocity anisotropy as a function of confining pressure have been studied under laboratory ultrasonic frequency for shale and sandstone with marked foliation, which had been saturated by the fluids with different viscosity kerosene and vacuum pump oil and salinity distilled water, 50000

    利用不同黏度煤油和真空泵油不同礦化度蒸餾水50mg l和150mg l的nacl溶液的流體對頁巖和具有明顯層理的砂巖進行飽和，在實驗室超聲頻率下研究樣品不同方向縱橫波速度以及各向異性參數
  2. Spurt water column not only is a good coupling medium of ultrasonic, but also can get rid of impurity, such as power, vapor and oil film on the surface of the measured object, so this sensor can adapt various environments

    因為水柱不僅是超聲波傳播的良好介質，還可將被測物表面的粉塵、水汽、油膜等雜質吹走，使系統具有良好的環境適應能力。在惡劣環境下進行位移測量時，該傳感器具有其他儀器不可比擬的優越性。
  3. 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。
  4. Abstract : in order to obtain the mechanical properties of cemented soil, a series of cemented soil specimens with different cement ratios are conducted through uniaxial compression tests and ultrasonic wave tests. the link of the compressive strength of the prismatic specimens and the cubic ones is established. the relationship between the uniaxial compressive strength and the speed of ultrasonic wave of cemented soil specimens are acquired

    文摘:本文通過室內抗壓實驗及超聲波波速實驗的方法，對不同水泥摻入比下水泥土的力學性能進行了研究，獲得了水泥土材料稜柱體抗壓強度與立方體抗壓強度之間的關系，以及抗壓強度與波速之間的關系式。
  5. Klac gene was ligated to the pet - 30a ( + ) vector for expression. then the recombinant plasmid petlac4 was transformed into e. coli bl21. the positive transformants were induced at different temperature for three hours by iptg with the final concentration of lmm. sds - page analysis and lactase activity assay showed that klac gene was expressed in e. coli, and that the expression level at 28 was much higher than that at 37

    表達產物的sds - page分析和酶活性測定表明， klac基因在大腸桿菌中獲得活性表達，其中低溫條件28下的表達水平明顯高於37 ， 28誘導的細胞經超聲波破碎所測酶活力為0 . 475u / ml ， 37僅為0 . 134u / ml 。
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