椭圆周长
椭圆周长-
椭圆周长的作图求解法及其误差分析
A Method of Rectifying the Circumference of Ellipse & Its Error Analysis
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椭圆周长公式在房间隔缺损介入治疗中的应用及对术后心脏重构和心功能的影响
Application of Oval Circumference Formula on Interventional Therapy for Atrial Septal Defect and Its Effect on Cardiac Remodelling and Heart Function after Transcatheter Closure in Children
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给出了由已知主管相贯线处直径确定分支管直径和椭圆周长或反向求解的计算公式，讨论了精度。
The formula to calculate the diameter of branch pipes and ellipse girth was given when the diameter of main pipe is known or reverse to resolve , discussed calculation accuracy .
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在双曲空间中，对椭圆的周长及平均绝对曲率做出细致考察。
Geometric data of ellipse in hyperbolic space are considered , such as perimeter and mean absolute curvature .