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1·It is essential to study the principal curvature of hypersurface in the hypersurface geometry.

在超曲面几何学中，对主曲率的研究是至关重要的。

2·Using the principal curvature formula, we prove an existence theorem of Weingarten hypersurface.

并利用主曲率计算公式证明了W-超曲面的一个存在性定理。

3·Since the existence of embedded rotation surface with given principal curvature function is well proofed, the design and modeling of the surface becomes possible.

由于给定主曲率函数的嵌入旋转曲面存在性已得到较好证明，故使得曲面的设计成为可能。

4·This paper USES principal curvature, plane stress and structure filtering to evaluate the development of fracture at geology shape, mechanical and signal handle facet.

本文应用主曲率分析技术、平面应力分析技术、构造滤波技术，从地质形态、力学角度、信号处理的角度给出了地质构造的裂缝发育评价。

5·The general equations of principal curvature derived from differential geometry overcame the limitations of previous equations derived from the theory of elastic thin plate with small deflection.

由微分几何学原理得到计算主曲率的一般公式，克服了由薄板小扰度弯曲理论得到的主曲率计算公式的局限性。

6·In this article, the principal factors affecting hole curvature are analysed, the principle of anti-deflecting packed hole assembly design is discussed.

本文分析了影响井眼曲率的主要因素，论述满眼防斜钻具组合设计的原则。

7·We use principal component analysis on term structure we got. Base on this result, we build three factors: level, slope and curvature.

本文对利率期限结构做了主成分分析，并根据结果构建了利率的水平、斜率和曲度三个因子。