According to structural property of linear optical amplifier (LOA), a model was built using rate equations.
针对线性光放大器(loa)的结构特点，建立了基于速率方程的模型。
The incremental motion equations of a M DOF structural system excitated by seismic waves are formulated based on FEM, and a seismic response model for cable stayed bridges are proposed.
基于有限单元法，推导出多自由度结构体系在地震作用下的增量形式的运动方程，建立了大跨度斜拉桥的地震激励模型。
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