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The propagation and transfotmation of GLB in a homogeneous medium is discussed.
讨论了类高斯光束在均匀介质中的传播。
Finite Element Technique based on Rayleigh-Ritz idea is used to solve wave propagation in non-homogeneous medium with variable velocities.
为求解变速不均匀介质中波的传播问题,使用了利用瑞雷-里兹法的有限元技术。
By high acetylation of chitosan at N position with acetic anhydride in a homogeneous medium known as acetic solution–alcohol-pyridine system, water-soluble chitosan was prepared.
探讨了如何控制在均相条件下以高脱乙酰度的壳聚糖为主要原料,在乙酸水溶液- 乙醇- 吡啶介质中实现壳聚糖N位乙酰化反应的问题;
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