几何形状

In this paper, based on a pill-box window model with a conical-shaped alumina ceramic and Ansoft HFSS software, the relation of VSWR with various electrical parameters in the window is simulated; the effects of variations of the output window structure on electrical field intensity, microwave power flow and quantity of heat are analyzed; the electrical characteristics of frequency bandwidth, power capability and heat dissipation for the pill-box window with conical-shaped or disk alumina ceramic are discussed, which shows that, with a rational structure of the window with conical-shaped alumina ceramic, the output capability of microwave peak and average power may greatly be increased, the secondary electron emission may effectively be suppressed, and heat dissipation may become more uniform and be easier for cooling.

本文在前人工作的基础上，基于圆锥形陶瓷盒形输出窗模型，采用Ansoft HFSS三维计算软件的优化模拟，对该输出窗模型的驻波频率特性与各种结构参量的关系进行了优化模拟，分析了该输出窗片结构变化对其表面的电场分布，功率流分布、热量分布的影响，得出最优模型参数。并且探讨了陶瓷窗片的形状和几何结构对改善输出窗的频带特性、提高峰值功率和平均功率、抑制二次电子倍增方面的作用。

Study: the first day: ceramic perm on the theory and analysis of the principles of ceramic perm hair physi sign Pi and mathematics, made a single film roll with the law, made into bars at the end of the display, three bars into technology, into the bars of the nine changes in the bar when the bar into the core of the film made with the point of view, the core of the ring a few bars And calculation of the perm and the relationship between the separation and shape the relationship between the perm, hair texture and appearance to the effect, the geometric shapes scald Division

陶瓷烫发原理毛发生理学知识，设计原则分析，设计的适应性，陶瓷烫的元素解析，发质与烫发的关系，裁剪结构与烫发的关系，烫发设计与数学圆周率，单片发片与卷法，进杠时发尾的摆放情况，三个进杠技术，九个进杠变化，进杠时杠芯与发片的角度，杠芯的圈数和计算与烫发的关系，分出形状与烫发的关系，发丝的纹理走向与外观效果，造型烫的几何分区

Study: the first day: ceramic perm on the theory and analysis of the principles of ceramic perm hair physiology knowledge, design principles, the design of adaptive, hot ceramic element analysis, hair perm and the relationship between structure and cut the relationship between the perm, Hair Design Pi and mathematics, made a single film roll with the law, made into bars at the end of the display, three bars into technology, into the bars of the nine changes in the bar when the bar into the core of the film made with the point of view, the core of the ring a few bars And calculation of the perm and the relationship between the separation and shape the relationship between the perm, hair texture and appearance to the effect, the geometric shapes scald Division

陶瓷烫发原理毛发生理学知识，设计原则分析，设计的适应性，陶瓷烫的元素解析，发质与烫发的关系，裁剪结构与烫发的关系，烫发设计与数学圆周率，单片发片与卷法，进杠时发尾的摆放情况，三个进杠技术，九个进杠变化，进杠时杠芯与发片的角度，杠芯的圈数和计算与烫发的关系，分出形状与烫发的关系，发丝的纹理走向与外观效果，造型烫的几何分区

In many applications, it is desirable to analyze the parametric curves for undesirable features like cusps and inflection points.

为了便于对参数曲线段的形状控制和几何特征的进一步认识，在许多的实际应用中，需要分析参数曲线段上有无多余拐点和奇点，如果有就要消除它。

The hunter and the game picture have the geometry the line and the shape.

猎人和猎物都画成几何的线条和形状。

The influence of train running speed, wheel-rail friction coefficient, vehicle load, track geometric irregularity, partly load, gauge and the shape of wheel tread on derailment was emphasized.

论文重点分析了车辆运行速度、轮轨摩擦系数、车辆载重、轨道几何不平顺、偏载、轨距大小、车轮踏面形状等因素对脱轨的影响。

This method uses all noisy datapoints directly to implement triangulation and dispenses with smoothing and datareduction process, which may lead to loss of geometric character. Moreover, thismethod is of lower complexity than other triangulation and the amount of vertexes inmesh can also be calculated, so we can control the size of mesh in advance. At last, apractical example is given to prove its effectiveness.

这种方法利用全部数据点信息进行网格剖分，无需对数据进行平滑、精简等预处理，避免了因平滑或精简而丢失重要的几何信息的可能，这种方法不仅比现有三角网格剖分算法降低了算法复杂度，而且具有可以直接处理带有噪声的数据，网格规模可控，生成的三角网格形状较好等优点。

On the basis of theoretical result of convex polyhedra, the thesis includes two parts of research which aim at different problems.

多面体链环是由多个环相互嵌套成的具有多面体形状的一种拓扑几何结构。

In fact, Computer Graphics indicate the developmental level of the Computer software and hardware, This is because Graphics have become the most important medium to transfer all kinds of information. Computer Graphics?research object is graphics, and the point , line and surface make up of the graphics ,In addition, During the real application, every graphics is made up of millions of the lines and curves, the speed and quality of the line and curve affected the implement of the whole graphics.

计算机图形学的研究对象是图形，而构成图形的几何要素就是刻画形状的点、线、面、体等，并且在具体应用中，每一幅图形都由成百上千条直线和曲线构成，这样对于每一条直线或曲线的处理速度和质量极大地影响着整幅图形的处理速度和质量，因此，对于计算机图形学基础算法的研究就具有重要意义，本文就是对计算机图形学的基础算法进行研究，包括直线和曲线的生成和裁剪算法以及基本象素的图形变换。

In the aspect of structure line detection, the main idea is to separate the roof structure lines into two parts, one is for external contours and the other is for internal structure lines. The external contours were extracted using Hough transform and other geometric conditions. The internal structure lines were extracted by any two adjacent roof faces intersecting each other. Finally, the two kinds of structure lines were combined to construct the roof shapes.

而在结构线的侦测方面，主要将屋顶结构线分为两个部份来进行，第ㄧ为外部轮廓线，萃取的方式是利用霍夫转换及其他附加几何条件来进行；第二为内部结构线，萃取的方式为利用相邻屋顶面的交会来获得；最后再将此二种特徵线合并在一起，进而重建完整的屋顶面形状。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。