1) second-order moment method
2阶矩法
1.
In order to study the focusing properties of cosine-squared Gaussian beams(CsSGB) through a lens without aperture,the equation for the axial irradiance distribution of focused CsSGB are derived based on the Collins formula,and the analytical expression of beams waist width is presented using the second-order moment method.
为了研究余弦平方-高斯光束通过无光阑透镜后的聚焦特性,采用Collins公式推导了聚焦余弦平方-高斯光束轴上光强分布公式,并利用空间2阶矩法求得光束束腰宽度的解析表达式。
3) second order moment processes
2阶矩过程
4) forth moment method
四阶矩法
1.
The forth moment method is recommanded,and some useful conclusions on its accuracy control are provided.
提出了结构分析中应采用四阶矩法,并给出应用该方法时精度控制的若干建议。
5) second order moment method
二阶矩法
1.
The second order moment method was used to derive the analytical formulas for both beam waist and the position of the waist of the focused elegant sin Gaussian beam.
用二阶矩法推导出了复宗量正弦高斯光束的束腰宽度及其位置的解析表达式,用此表达式可计算复宗量正弦高斯光束的焦移。
6) moment order reduction method
矩降阶法
补充资料：矩法
1.规矩;法式。
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