查询词典 descriptive geometry

In addition, the common high school mathematicalcurriculum standard regards spherical geometry as special subject 3 ofthe third optional series, which is set up to further improve the qualityof math students whoa re interested in mathematics and geometry withthe purpose of cultivating students imagination and geometric spaceabilities.

普通高中数学课程标准将球面上的几何作为普通高中选修系列3的专题3。

Spherical geometry;; spherical triangle;; non-Euclidean geometry;; Euler formula;; cognition;; SOLO taxonomy theory

论文导师张红，论文学位硕士，论文专业学科教学论文单位四川师范大学，点击次数 8，论文页数 73页File Size3160K

Results The four main mathematical branches in 17th century are considered roundly in the general view: analytic geometry,calculus,algebra and synthetic geometry.

结果17世纪数学形成四大分支———解析几何、微积分、代数和综合几何。

Through hang together the simplex data model based on dissection and conventional GIS data model, we develop a integrated and polymorphic model, object oriented unified model of tessellated simplex and conventional GIS, which convenient to inherit and congregate. The model manage the abstracted data accord to 4 level factor, that is geometry object model, topologic geometry object view model and geography object model.

论文采用面向对象的方法把基于剖分的单纯形数据模型与传统的GIS数据模型结合在一起，提出并建立了一个便于继承、组合、多态的较完整的三维数据模型与结构一面向对象的单纯形剖分与GIS一体化三维数据模型。

The method will eventually converge to a near optimal solution and is relatively unaffected by the outliers.Ⅲ. Trilinear geometry estimation based on messy genetic algorithm: similar to the method of epipolar geometry estimation. Experiments show that it is more robust and precise than other typical methods, but takes more time to get the final result.Ⅳ.

ii基于混合遗传算法的对极几何估计：以最小的数据子集来构造染色体，利用染色体在某一位置上的基因冗余来提高遗传算法的选择能力，尽管这样会增加运算的复杂度，但却更有可能寻找到全局最优解，并且运算精度略高于中的算法。

Geometry needs to have the "bone" user property flagged, or it will actually draw the geometry. These bone types need to be unhidden when you are exporting them.

可接受的骨骼类型角色单位的动画骨骼可以使用3ds max内建的骨骼物体，帮助物体，甚至是多边形体。

Based on the recognized dimension structures, this paper further introduces the geometry reconstruction process of engineering drawings and proposes a new method-"Unitary Geometry Reconstruction for Vectorization". By analysis and utilization of the dimensioning information in a drawing, this process promotes the precision of vectorization results to meet the needs of most CAD systems.

在识别出的尺寸标识基础上，本文进一步提出了基于整体的图样重建方法，通过对工程图中的尺寸信息进行分析和使用，使矢量化结果在数据表示和精度上满足CAD系统的需要。

Precise describe of geometry structure is an important premise to realize numerical simulation, but the diesel model refers to intake system, exhaust system, turbocharger system, fuel injection set, cylinder and crank case etc, which have complex structure, therefore, if the geometry model is established as true structure, it will spend a great lot of time and it is unrealizable and unnecessary.

几何结构的精确描述是实现准确实现数值模拟的重要前提，但柴油机模型涉及到进气系统、排气系统、涡轮增压系统、喷油组件、气缸和曲轴箱等诸多实体，而且结构极其复杂，如按真实实体结构建立计算几何模型需要花费大量时间且难以实现，也没有必要。

Methods Based on thin layer CT mandible image data and the USIS software by ourselves, the individual geometry of the complete range of mandible was well established, also the distinction between the contour boundary of cortical and cancellous bones was done automatically. A series of new effective CAD methods such as "no-seed region segmentation", non-parallel "best cross-section planes" and the algorithm employed a pair of B-spline curves fitting were used to accurately construct of 3D geometry surface model of the complete range of mandible in a man-machine conversation and automatic style.

利用CT薄层扫描下颌骨获取的断层图像数据，在自主开发的USIS软件的基础上，自动分辨骨皮质和骨松质轮廓边界，并对下颌骨采用"非种子区域分割"、非平行"最佳切割曲面"及"B样条曲线拟合法"一系列新型CAD方法进行人机对话自动重建精确的几何表面模型。

The book review first vector and matrix algebra, the basic concepts and then described in detail geometry involved in a variety of two-dimensional graphics and three-dimensional geometric measurement of the object, the intersection of various algorithms and other issues, and provides information on the theme of a large number of computational geometry materials in order to facilitate quick reference.

全书先复习了向量和矩阵代数的基本概念，而后详细地描述了图形几何学涉及的各种二维和三维对象的几何测量、相交等问题的各种算法，并提供了关于计算几何学主题的大量材料以便于快速参考。

I go to school at night.

我是上上学。

Clear Tip Nasal Aspirator: A soft time and gentle suction action makes removing excess mucus easy.

鼻吸明确提示：一个柔软的时间和温柔吸力行动使消除过剩的粘液容易。