The paper presents how the higher order singularity of a boundary integral equation can be reduced.
边界元法中如何有效地处理奇异积分，一直是人们极为关心的课题。
The singularity is located nearer to the central axis for the pulses with higher order transverse modes and shorter pulse duration.
对于啁啾量相同的脉冲，脉冲宽度越小或模指数越大其奇异性位置离光束中心越近。
The singularity is located nearer to the central axis for the pulses with higher order transverse modes and shorter pulse duration.
对于啁啾量相同的脉冲，脉冲宽度越小或模指数越大其奇异性位置离光束中心越近。
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