echo attenuation 中文意思是什麼

echo attenuation 解釋
反射衰減
  • echo : n （pl echoes）1 回聲，反響；共鳴，反映。2 重復，摹仿；摹仿者；應聲蟲。3 【音韻學】與上句末音押韻...
  • attenuation : n. 1. 變薄，變細。2. 減少，減弱。3. 稀釋。4. 【物理學】衰減。
  1. Method for measurement of ultrasonic attenuation coefficient of solid by pulse echo technique

    用脈沖回波技術測量固體超聲波衰減系數的檢測方法
  2. The results show that these algorithms for attenuation correction can work well in the valid range and their effects on attenuation correction are almost identical. when attenuation is strong or measurement error of real echo is large, however, the result from the h - b algorithm for attenuation correction is not good

    結果表明：在有效的訂正范圍內，幾種訂正方法均能得到很好的訂正，並且訂正效果幾乎保持一致，但h - b演算法在衰減作用很強或實際回波測量值誤差很大時，其訂正結果就變得不可靠了，從而造成訂正能力下降。
  3. ( 2 ) based on the mode of ultrasonic echo, this paper designs a frequency - dependent compensation filter to compensate the absorbed attenuation when the ultrasound transmits in a tissue

    （ 2 ）在建立超聲回波信號的數學模型的基礎上，設計了頻率補償濾波器。
  4. Standard test method for measurement of ultrasonic attenuation coefficients of advanced ceramics by pulse - echo contact technique

    用脈沖反射接觸技術測量高級陶瓷超聲衰減系數的標準試驗方法
  5. The application of longitudinal pulse - echo is relatively simple, which can provide information of the thin layers such as the depth, ultrasonic velocity, attenuation etc

    縱波脈沖回波法簡單易行，能夠獲得薄層厚度、聲速和衰減等信息。
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