这函数描绘出位移曲线的包络。
This function describes the envelope of the displacement curve.
基于该结果，还能求取某一置信水平下的预测负荷曲线的包络线。
According to the result, envelopes of load forecasting curve under certain confidence level can also be obtained.
运用LEADS软件，进行了束流传输的模拟计算，并显示了束流传输包络曲线。
Use the LEADS software to simulate the calculation of beam transfer, and show the envelope curve of beam transfer.
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