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。
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