準直聲束 的英文怎麼說

中文拼音 [zhǔnzhíshēngshù]
準直聲束 英文
collimated sound beam
  • : Ⅰ名詞1 (標準) standard; guideline; criterion; norm 2 (目標) aim; target Ⅱ動詞1 (依據; 依照)...
  • : Ⅰ形容詞1 (成直線的; 硬挺的) straight; stiff 2 (跟地面垂直的; 從上到下的; 從前到后的) erect; v...
  • : Ⅰ動詞1 (捆; 系) bind; tie 2 (控制; 約束)control; restrain Ⅱ量詞(用於捆在一起的東西) bundle;...
  1. Standard specification for straight - beam ultrasonic examination of plain and clad steel plates for special applications

    特殊設備用的普通鋼板和包覆鋼板的探傷檢驗的標規范
  2. Based the research on the laser beam drift feedback control technique, analysing the beam drift and its frequency components, a laser beam directional stability method is studied in the thesis in detail, with its measurement and control circuit system that combines the laser beam intensity modulation and the beam drift feedback control technique. in this method, at first the laser beam intensity is modulated with the acoustooptic modulator, then the lock - in amplifier is applied to detect and demodulate the modulating signal, at last a feedback control signal is generated by the dsp control circuit at last, including : 1

    本文在原有的激光光漂移量反饋控制技術的基礎上,對光漂移量信號的數據和頻譜進行了分析,重點研究了一種集光調制光強與光漂移量反饋控制技術於一體的激光光方向穩定方法及其測控電路系統,該方法通過光調制實現光強調制,接著通過鎖相放大電路檢測並解調調制信號,然後通過dsp控制電路進一步對光的漂移量進行反饋控制。
  3. Standard guide for detection and evaluation of discontinuities by contact pulse - echo straight - beam ultrasonic methods

    用觸點脈沖回法探測和評價不連續性的標指南
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