查询词典 geometric

This may be due to the substrate effect or geometric confinement.

这可能是由於基板及几何维数的限制导致。

Research on application of conformal mapping in geometric modeling is investigated in this paper.

本文对保形映射理论在几何造型中的某些应用问题进行了研究，提出了基于Mbius变换的圆弧样条曲线构造方法、基于保形映射的变形造型方法以及利用保形映射进行三角网格曲面参数化的新方法。

Experimental results show that our algorithm reduces the geometric distortion effectively and ensures the validity of the conformal mapping.

实验结果表明，该算法通过优化切割线和参数域边界有效地降低了三角形形状扭曲，并保证了参数化结果的合法性。

Because it emphasizes on algebraic method, geometric intuition are lose. Especially in the unit of conic section, although "the unity of geometrical material and algebraic symbol "is the teaching objective of text books, but according to the material of text books, it is difficult for students to arrive.

本文首先试著分析目前高中数学教科书中，对於几何部份的教材编写上，由於编写者的意识型态不同，理念不同，数学教师对教科书的诠释就会因此而有不同，因而造成目前高中几何教学著重在代数方程式上的一些问题。

This article takes the teaching of conic sections as an example. By designing worksheets, teachers can introduce the historical material about conic sections to students. By way of using Apollonius' definition of parabola, ellipse and hyperbola, teachers can introduce the geometric aspect of "conic section" to students. By using the concept of " latus rectum " in Conics , we can connect "conic sections"-- representation of geometrical aspect, with "the equation of conic sections"-- representation of algebraic aspect to improving insufficiency of text books.

同时本文也试著从历史文本中寻找材料，简单举例说明数学教师可以如何应用这些史料在几何单元教学上，例如三角函数的正余弦定理，最后再以圆锥曲线的正焦弦为例，说明如何利用数学史料於此单元的教学，尤其是阿波罗尼斯的《锥线论》中对圆锥曲线的3个命题，将此3个命题的内容与意涵，尤其是正焦弦在圆锥曲线的几何意义上所扮演的角色，将其适当地融入教学中，将可使学生真正学习圆锥曲线的几何知识，而不再只是代数形式的几何知识。

Conic is indispensable in geometric modeling and CAD/CAM system.

二次曲线是几何造型系统、CAD／CAM集成系统不可缺少的内容。

Automatic identification method of conics is studied based on the curve geometric invariants.

讨论了基于二次曲线不变量的圆锥曲线特征自动识别方法。

First, it is intrinsically a multiple view approach as all geometric information from the whole sequence is nicely summarized in the conics.

该课题的完成，极大地降低了原有算法的复杂度，并为分析所有基于单轴旋转的运动提供了新的思路和方法。

Geometric Constraint Solving with Conics;2. By comparison, we conclude that the operations on conics are more efficien than those on elliptic curves is concluded.

文中介绍了有限域上的圆锥曲线的点群结构及加法运算，给出了三种不同的方法计算加法，并进一步比较了他们在数乘运算中的效率。

By using the flank profile normal method of the plane engagement theory, the characteristic of the conjugate line pattem of the screw-liner pair on the single head single screw hydraulic machinery is investigated, and its geometric curvature, conugate line shape and slide cocfficient are analyzed.

利用平面啮合理论的齿廓法线法研究了单头单螺杆水力机械螺杆－衬套副的共轭线型特征，并对其几何曲率、啮合线形状和滑动系数等基本特性进行了分析。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。