The total refractivity content along the ray path is an important propagation parameter in space times.

在空间时代，沿射线路径的总折射率是研究电波传播的重要参数。

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An effective evaluation function is constructed, which use the signal line on the propagation path among the fault point and primary outputs. That makes the algorithm has the minimal search space.

该算法基于遗传算法，使用故障信号传播路径上的信号线来构造算法的评价函数，使得算法具有最小的搜索空间。

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