hail,soft hail graupel

This paper describes the principle of the canister fired by twice firing technique.

阐述了霰弹的二次发射原理,建立了相应的数学物理模型,通过数值计算的方法对该模型进行了动力学仿真计算,得到一系列的具有参考应用价值的结果曲线;该数学模型有助于了解各结构参数对二次发射全过程影响的物理规律,和指导霰弹的工程设计工作。

Synthesis of Spherical Vaterite CaCO_3 Particles by Solid-state Reaction at Room Temperature;

利用室温固态反应制备球霰石型CaCO_3粒子

It is found that in the given conditions,CaCO3 crystal can be successfully induced to grow into a spherical crystal by adjusting the PVA concentration,the size of vaterite becomes larger when the CaCl2 concen.

利用聚乙烯醇(PVA)作为有机基质,控制适当的反应条件,模拟碳酸钙的生物矿化,进行仿生合成,制备出了球霰石型的碳酸钙球形晶体。

The vaterite is synthesized by the templating method with anionic surfactants SDBS.

用十二烷基苯磺酸钠(SDBS)为模板,制备了球霰石型CaCO3。