Based on these, the formation conditions of the fundamental grating solitons with the frequency close to the photonic band gap are discussed. 在此基础上讨论了光纤光栅中基态孤子形成的条件,并提出实现低功率光纤光栅孤子的一些方案。
The fundamental frequency of Panda's voice is within 200-300 Hz, the second harmonic band of it is about 400 Ha, and the amplitude histogram of Panda's bark is similar to γ-distribution. 大熊猫叫声旺的基颇为200~300Hz,次频带为400Hz左右,叫声的幅度直方图似伽玛分布。
Example results show that the frequency band of fundamental frequency plays a primary role in structural response, the further a frequency band is away from fundamental frequency, the smaller contribution it will create to structural displacement response. 算例结果表明,结构基频所在频带对结构反应起决定作用,越是远离基频的频带对结构位移反应的贡献越小。
The band gap is one of the most fundamental characteristics of photonic crystal. The frequency band of light falling into the band gap will be the prohibition of propagation. 光子晶体最根本的特性之一是光子禁带,频率落在禁带中的光,会被禁止传播。