The coupled differential equations of the dimensionless beam width parameters of two optical beams are solved.
求解了两光束无量纲束宽参量的耦合微分方程。
Let the spindle system of a kind of plane grinding machine be simplified to a structure of coupled double-elastic beam and using modality synthetic method to establish its dynamic model.
将一类平面磨床主轴系统简化为耦合双弹性梁结构，用模态综合法建立其动力学模型。
The coupled equation of two-wave mixing and expressions for weak beam amplification in a single mode waveguide are deduced by application of coupled wave theory.
本文利用耦合波理论分析推导了单模平面光波导中两波混合的耦合波方程和弱相干光放大率的表示式。
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