effective gap有效缝隙宽度effectiveadj.有效的；生效的；实际的effective sieve aperture size有效筛眼孔径effective frequency deviation有效频率偏差Effective Teaching Principles有效教学原则effective nocturnal radiation夜间有效辐射effective densities of states有效态密度effective themal conductivity有效导热率effective exchange rate index实际汇率指数effective jamming probability有效干扰概率effective quality in practice实践有效质effective radius of curvature有效曲率半径

1. The logical effective radius was selected, and the propagation properties of TIR-PCF were discussed with the classical theory of step-index fiber.
   选择了较合理的有效半径，利用经典的阶跃光纤理论来研究光子晶体光纤的传输特性。