The altitude semi-analytic expansion of ion densities is a key problem in parameterization of physical ionospheric models.
离子密度随高度的解析展开是电离层物理模式参数研究中的一个关键技术。
The frequency and analytic vibration models can be semi analytically calculated by vibration function and boundry condition.
通过给出振型函数和相应的边界条件，半解析地确定了螺旋管扇形结构的各阶频率和振型。
The frequency and analytic vibration models can be semi analytically calculated by vibration function and boundry condition.
通过给出振型函数和相应的边界条件，半解析地确定了螺旋管扇形结构的各阶频率和振型。
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