对二阶物面边界条件采用数学手段，推导出一个没有二阶空间导数的表达式，以便于计算。
Additionally, a mathematical manipulation is adopted to remove the second-order spacial derivatives in the body surface boundary condition.
所用的可靠度计算公式直接在基本变量空间中求解，避免了繁琐的求偏导数和正交变换工作。
The formula of reliability index is calculated in the origin space directly, so derivation and orthogonal transformation are avoided.
然后介绍了一种新的基于指定输入—输出空间的迭代学习控制思想，它即不需要对误差信号求导数，也不需要知道被控对象的对偶映射。
Then introduce a new theory of ILC based on prescribed input-output subspace, it requires neither derivatives of the error signals nor dual mapping.
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