Flexibleshaft can adjusted to high speed mode. Convenient for transition on field.
软轴可调高速度模式，转场方便。
The Gaussian field can be obtained by controlling the mode coupling from the main mode to high mode.
要得到口面上的合成高斯场，就必须控制从单模到合成高斯场的各个波导模式的耦合过程。
The theory and high efficient algorithm is set up to obtain the numerical mode Greens function for static steady field problem in arbitrary cylindrical layered media.
对于轴对称任意径向分层的完全非均匀介质，建立了求解静场问题数值模格林函数的理论及高效计算方法；
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