And the scanning algorithm is improved to overcome the defect of traditional algorithm, whose convergence is not ensured.

在此基础上改进了扫描线算法，克服了传统扫描线算法求解收敛性得不到保证的不足。

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In this paper, it gives a criteria of convergence of infinite integral about the positive function and expands it on the defect integral.

主要探讨了从函数自身的性质判定无穷积分敛散性的方法，并将其推广到瑕积分。

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