The optical soliton propagation in monomode optical fibres with third-order dispersion is reinvestigated by using variational method. The evolution equations for optical soliton parameters are found, and self-wave-peak shift phenomena is explained quantitatively. 用变分法重新研究了单模光纤中的三阶色散对光孤子传输的影响,找到了光孤子参数的演化方程组,定量地解释了光孤子的自波峰漂移现象。
Lewis acid catalyzed acetylation of steroidal sapogenin was reinvestigated, and the previous assigned structures A, B and C of E/ F ring opening products were rectified as 1, 2 and 3 according to X ray diffraction analysis. 重新研究了Lewis酸催化的甾体皂甙元E/F螺环乙酰化开环反应,并通过波谱分析和单晶X衍射修正了原指定结构。
Thus, the enhancement function of the Eu(ⅲ) complexes as light conversion agents on the photosynthesis should be reinvestigated. Eu(Ⅲ)配合物光转换剂加强光合作用的功能需要重新评价。