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- It mainly deals with the properties for the principal curvatures of the hypersurface and gets two sufficient conditions under which S has a second gap.Also estimates for the gap s length are obtained. 通过对此超曲面主曲率的研究，给出了S的可能值存在第二空隙的两个充分条件，并分别估计了在这些条件下的空隙长度。
- THE APPLICATION OF PRINCIPAL CURVATURES IN STUDY IN RESERVOIR FRACTURE 地层主曲率在研究储层裂缝发育中的应用
- The principal curvature method and Gauss curvature method are two mathematic methods for appraising and predicating distribution of reservoir fractures. 最小曲率法是定向井、水平井轨道设计、测斜计算中经常使用的一种方法。
- 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。
- In this note, by means of families of parallel surfaces, we obtain a necessary and sufficient condition for a smooth surface M in H3 to be constant principal curvature. 借助平行曲面族的特征来刻划H3中的光滑曲面M;从而得到M是常主曲率的一个充要条件.
- Modeling a Free-form Surface Based On Perspective Projection, Normal Vectors, Tangent Vectors and Principal Curvatures 基于曲面透视投影和内在几何的自由曲面造型
- Analysis of Pressure Angles and Principal Curvatures of Conical Cam with a Translating Follower 直动从动件圆锥凸轮机构压力角与廓面主曲率分析
- My wages are the principal source of my income. 薪金是我收入的主要来源。
- The principal shareholder ask for a meeting. 主要股东们要求召开会议。
- The agent spoke on behalf of his principal. 代理人代表他的委托人说话。
- Keys are available on application to the principal. 向校长申请就可得到钥匙。
- She's been downgraded (from principal) to deputy. 她已(从校长)降为副校长。
- Our principal problem is lack of time. 我们的主要问题就是缺少时间。
- She drank in every word of the principal's lecture. 她全神贯注地听校长演讲的字字句句。
- John informed the principal against Paul. 约翰向校长告发了保罗。
- The central or principal vein of a leaf. 中脉中心的或主要的叶脉
- The principal discouraged unexcused absences. 校长不准无故缺课。
- Rubber is the country's principal export. 橡胶制品是该国主要的出口产品。
- The principal has a very tight schedule. 校长的日程表排得满满的。
- Our school gave a reception to our new principal. 我们学校为新校长举行了欢迎会。
