cavitation threshold 中文意思是什麼
cavitation threshold
解釋
空化閾- cavitation : n. 1. 【航空】氣穴現象；氣渦現象。2. 【物理學】成穴；空化，（超聲波的）空穴作用；【醫學】成洞，成腔。
- threshold : n. 1. 門檻；入口，門口。2. 【心理學】閾限。3. 界限，限度。4. 【物理學】臨界值，閾。5. 入門，開始，開端。
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Increasing ultrasound intensity in the range of cavitation threshold and cavitation peak value, decreasing monomer concentration and increasing the temperature make the induction period shorter. under optimized reaction conditions, the conversion of ba can reach 90 % in 11 min at high n2 flow rate the viscosity average molecular weight of the obtained pba reaches 5. 24 106. the molecular weight of pba varies with ultrasonic irradiation time, indicating that the ultrasonic induced emulsion polymerization is dynamic and quite complicated, polymerization of monomer as well as degradation of polymer occurs concomitantly
一、實現了無常規化學引發劑存在下的超聲輻照引發丙烯酸正丁酯（ ba ）間歇乳液聚合，制備了pba納米粒子，在11min內轉化率達到90 ，分子量達5 . 24 10 ~ 6 ，隨反應時間的延長而降低，表明超聲輻照引發乳液聚合是一個動態的復雜過程，單體的聚合和聚合物的降解同時發生。 -
Ultrasound cavitation and sonoluminescence ( sl ) generation have gained great interests in recent years, in this paper, we attributed to discuss the influence of ultrasonic frequency and the gas component inside on the sl threshold pressure and have gotten some value results. in addation, the method for measuring the ultrasonic pressure intensity dynamically by the means of sl image is also discussed
本論文在調研國際、國內有關聲致發光研究歷史和進展的前提下，對如何降低聲致發光的閾值在理論上和實驗上展開工作，取得了一定的成果，並設計了一個新的測量超聲場強度的方法，實驗上證明了其可行性。
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