step index fiber modes of 阶变折射率光纤模态
Then the mode series of step index planar dielectric waveguide and circular optical fiber are studied, including propagation modes and radiation modes.
接着推导了阶跃折射率平面介质波导和圆光纤的正交模式——包括束缚模式和辐射模式。
The business concentrative degree is an important index which reflects different management modes and size extension ways of firms, such as the specialization, diversification and so on.
业务集中度是反映企业专注于专业化、多元化等不同经营模式和不同规模扩张方式的一项重要指标。
An index system for levee failure risk assessment was established based on the analysis of factors and modes of levee failure.
通过对堤坝失事模式和影响因素分析，确定了堤坝失事风险评价指标体系。
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