几何图形

2D hairy brush model, 3D hairy brush model and parametric curve scheme are analyzed and various algorithms are compared.

把绘制方法分为2D，3D毛笔模型以及基于参数化曲线的纯几何图形学方法，对其中的典型算法进行了分析和比较。

In chapter 4, the case of risk asset allocation with allowed sell and restricted short sell is discussed, especially in case of restricted short sell, the efficient frontier piecewise partition is determined by using duality theory in parametric quadratic programming. And the concept of tripartition is introduced, economic meaning stated and algorithm to determine efficient frontier proposed.

特别对限制卖空的证券组合，应用参数二次规划对偶性理论解决了有效边缘曲线分片划分的问题，并引入了三元分割的概念，解释其经济意义，同时给出确定有效边缘的算法；对于协方差矩阵是奇异的情况，利用矩阵分块技术，得到不同情形下有效边缘的解析表达式，并用直观的几何图形描述，克服了M-V模型在实证分析中遇到的困难。

This paper introduced some application of Mathematica in drawing geometrical graphics,gave a common method to get the parametric function of surface of revolution in three-dimensional space,and the Mathematica programs of several examples about the surfaces were given.

介绍了Mathematica在几种几何图形绘制中的应用，提出了获得空间旋转曲面的参数方程的一般方法，并给出了用Mathematica绘制空间旋转曲面的实例的源代码。

In the measurement of work, the first test with control meaning the area to choose some point to form a certain geometrical form the skeleton of the surveyed area, with a relatively accurate means of measurement and calculation methods, in a unified coordinate system to determine these points plane coordinates and elevation, and then based on it to determine the point and other ground points, or construction setting, or other measurements.

在测量工作中，首先在测区内选择一些具有控制意义的点，组成一定的几何图形形成测区的骨架，用相对精确的测量手段和计算方法，在统一的坐标系中，确定这些点的平面坐标和高程，然后以它为基础来测定其他地面点的点位或进行施工放样，或进行其他测量工作。

Each new polygon is a new object that is represented by a row in the attribute table.

每一个新的几何图形是由列表示在属性表格中的一个新对象。

Information technology - International standardized profile FOD126 - Open document format: image applications - Enhanced document structure - Character, raster graphics, and geometric graphics content architecture - Document application profile DAP

国际标准化轮廓FOD126。开放式件格式：图像应用。增强型文档结构。字符、光栅图形和几何图形目录结构。

These buildings are some odd geometry - regular polygon, circle, triangle, rectangle, there are several miles of straight continuous lines.

这些建筑是一些古怪的几何图形——正多边形、圆形、三角形、长方形，还有连绵好几海里的笔直的线条。

This research dissects two regular triangles and assembles them into a large regular triangle. Using GSP and AutoCAD to draw and analyze geometric shapes, four dissection models and nine dissection methods are constructed. The extreme values under all conditions are also discussed, as are the best and generic dissection models. There is a Three-section type "best dissection model" and a semi "generic dissection model."

本文研究两正三角形，经切割后拼成另一大正三角形；期间以GSP及AutoCAD绘制分析几何图形，并建立了4种分割模式，得到了3段式「最佳分割模式」及准「通用分割模式」，提供这方面问题一个可应用於所有条件之完善解决方案。

The system utilized four laser scanners along lengthwise direction of the log. Data are obtained in every ten degrees when log is turning, in each cross section, 36 data are obtained. Then the data obtained were processed and an outline of the cross section of the log was developed on computer screen. Afterwards, the largest inscribed circles for log cross sections were determined according to the principle that three points can determine a circle. Secondly, the points located on the cross sections were linked up along some log generative in order to simulate the three-dimension log outline. At last the largest right circular cylinder were optimized and the optimum turning center was determined by means of projective theory.

具体作法是：在木段长度方向均匀设置四个激光传感器，当木段旋转时，起动激光传感器，进行数据采集，每隔10~0扫描一个点，在各横断面圆周上共采集36个点的数据，由计算机处理采集的数据，并绘制出原木横断面的几何图形，再根据三点定圆的原理，确定出最大内接圆；其次，模拟原木三维廓形，即将原木相邻横断面上离散点沿着母线方向连线，由计算机分析处理，绘制原木三维廓形；最后，采用投影法，优化出原木最大内接圆柱体，并确定原木回转中心线。

Combined with rotundity and oblong,the products show a new and advanced sculpts.

利用圆形，长方形等几何图形的巧妙组合，搭配出耳目一新、前卫突破的造型，既富洒脱豪迈的气派，又具灵活变通的实用精神。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。