河道两旁的分洪区能够为河流分蓄超额洪水发挥重要作用，分洪区扒口分洪后口门的展宽和刷深过程的模拟对于抗洪工作具有较为重要的现实意义。
The flood detention areas play an important role in flood-preventing project of river, because it can divert and store the excessive flood from the river.
由于非线性效应和惰性气体电离形成等离子体的共同作用，激光光谱可在成丝状态下被展宽。
Due to the nonlinear interaction and ionization, the spectrum of femtosecond laser pulses can be expanded through filament in noble gases.
考虑了光源初始啁啾的作用 ，推导出均方根脉宽的解析表达式 ，分析表明 ：二阶偏振模色散对脉冲展宽的作用与群速度色散及啁啾有关 ，一阶偏振模色散的作用则与这两者无关。
Taken into account both second order dispersion and SPM in the abnormal-dispersion region of single-mode fibers, we obtained the expression of chirp induced by GVD and SPM.
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