通过研究不同供氧水平对威兰胶发酵的影响，发现较高的溶氧水平有利于威兰胶的合成，但是不利于威兰胶黏度的提高。
The results indicated that high oxygen supply level could improve the welan gum production, but it was not helpful for welan gum viscosity.
兰姆波各模式在时频空间能量分布变化与胶接强度有较好的相关性。
The Lamb modes in the AU signals were analyzed using time-frequency method, and the energy variation of Lamb modes was correlated to the adhesive bond strength with good correlation.
用兰姆波可对固体火箭发动机进行胶接质量的检测，但需要对其模式进行选择。
Interface bond quality of solid propellant rocket motor can be tested by Lamb waves, but the modes of Lamb waves need to be selected.
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