本方法主要针对定位容易出现错误的外边界，利用虹膜的结构特征和数学手段，对得到的虹膜外边界点进行验证，必要时通过计算得到准确的外边界点。
To the iris' outer boundary, we use the feature of the iris' structure and mathematical means to verify whether the iris outer boundary points are correct, and calculate the correct ones if necessary.
利用现代教学手段进行数学教学具有深刻的现实意义。
It is full of deep and realistic significance to conduct mathematics teaching making use of modern medium.
在充分考虑数学教学的目的性以及教学手段的相宜性基础上，对利用MCAI技术辅助数学教学进行了有益的探索。
The paper attempts to study mathematics teaching assisted by MCAI on the basis of the object of the course and the appropriateness of the teaching methods.
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