波幅型超聲 的英文怎麼說
中文拼音 [bōfúxíngchāoshēng]
波幅型超聲
英文
amplitude mode-
Ultrasonic bio - instrumentation has several display modes used in medicinal field now, such as b - mode and m - mode, etc. b - mode uses the modulated brightness to represent the amplitudes of ultrasonic echoes, and the coordinates in the formed profiles correspond to positions of ultrasonic beam scans one by one
B型顯示是用亮度調制來顯示回波脈沖幅度，顯示的橫軸和縱軸與聲束掃描的位置一一對應，形成超聲切面圖像。Along with increase of pressure, the parameters such as velocity, amplitude, main frequency and quality factor of seismic wave change big gradually, while change very weakly with the change of temperature. through testing research for artificial crack and pore model, we conclude that crack density, azimuth, opening and the change of pore have obvious influences on speed, amplitude, attenuation ( or quality factor ) and main frequency of seismic wave etc. but, seismic wave dynamic characteristics are more evident than its kinematical characteristics for the change of crack and pore parameters. therefore, it offers reliable experiment foundation for detecting crack and pore by seismic wave kinematical characteristics ( such as amplitude, attenuation and main frequency etc. )
通過對人工裂縫和孔洞模型的超聲波實驗研究，可以認為：裂縫密度、方位、張開度和孔洞密度的變化對縱橫波的速度、振幅、衰減（或品質因子q ）和主頻率等參數均有明顯的影響，但裂隙參數的變化對地震波動力學特徵參數（振幅、衰減、主頻率等）的影響遠遠大於對運動學特徵參數（速度等）的影響，這為利用地震波的振幅、衰減和主頻率等屬性參數進行裂縫和孔洞特徵的檢測提供了可靠的實驗基礎。
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