研究矩形图元在圆形区域内的二维布局优化问题，建立了半无限优化模型。
The two-dimensional layout optimization problem about placing the rectangular graph elements on a round board is investigated and the semi-infinite optimization model is presented.
在预定的距离(一)，红外探测器“看到”的圆形区域内被称为可见的表面(乙)。
At a predetermined distance (a), the infrared detector "sees" a circular area that is called the visible surface (b).
采用分区域解法，给出了中心有椭圆孔的椭圆形区域内位势流动问题的解析通解。
The general analytic solution for the potential flow in an elliptical area with a coaxial elliptical hole was found by combining similar flow substitution and flow area division.
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