几何化

The hybrid density functional theory B3LYP with basis sets 6-31G^＊ has been used to study on the equilibrium geometries and electronic structures of possible isomers of Si3N4 dusters.

用杂化密度泛函B3LYP在6-31G^＊的水平上研究了Si3N4团簇可能结构的平衡几何构型和电子结构。

When a new face milling cutter is designed by means of feature-model technique and optimized cutting parameters, unequal tooth space and construction model, design efficiency is improved greatly.

新设计面铣刀时，由优选几何参数、不等齿距及建立的面铣刀结构数学模型，利用特征造型技术，实现了参数化设计，从而大大提高了设计效率。

Along with operations of the turning, sharpping, drilling, milling and grinding, some new methods, technologies and processings such as overlap workpieces, improved cutting tool formes, workpiece charmfer, adjustment of cutting parameters and others to restrain and decrease burrs in size are developed, which have noticeable theoretical significance and wide practical value in the precision cutting, FMS and automatic machining.

结合车削、刨削、钻削、铣削和磨削等加工，开发出了斜置工件法，双主偏角刀具切削法、切削用量选择法、刀具几何参数调整法、工件叠加切削法、工件终端部材料脆化法、工件终端部倒角法、挡板切削法、刀具结构改进法和切削方式选择法等十数种抑制或减小切削毛刺的技术、工艺和方法，在精密加工、柔性制造系统和其它自动化加工中有较大的实际应用价值。

This paper analyses the different influence on the fundamental matrix by the different matched points in images and theweighted factor is introduced to express the distance between the matched point and the epipolar line which has the obvious geometry meaning.

分析了图像匹配点对基础矩阵的不同影响，引入具有明显几何意义的匹配点到对极线的距离作为匹配点的加权因子，将匹配点集合看作随机变量并将加权因子作为匹配点的概率分布。在此基础上对原始图像数据进行归一化处理，利用8点算法得到基础矩阵。

Based on the garment design with the meshes, we assort spline curve into two types, that is to raisene idea that the ring and characteristic line are the basic geometry elements of three-dimensional garment model.

从人体服装设计所用曲面出发，通过对样条曲线进行分类，提出将环和特征线作为人体服装三维建模最基本的几何元素，并详细介绍了利用双线性插值法对人体服装中的两类子曲面进行三维建模的方法，从而在将参数化方法运用到高层次图素如样条曲线、曲面等方面作了尝试和推广

The process is described as follow: firstly, definition of welding line by alternately man-computer, including welding line geometry information and technical parameters, Secondly, welding line was scattered a series of welding point; Thirdly, visiting the elements of entity such as face, edge etc.

在规划中，首先通过交互手段定义并获取焊缝，包括焊缝的几何信息和工艺参数。然后，对焊缝离散化处理，得到一系列焊接路径点。

According to the wire electrode on the trajectory of the different forms of control, WEDM can be divided into three types:* is a copy-control, cutting their lines in advance to create the shape of the workpiece and the same mode *, When the rough machining parts and die at the same time * Clamping in the machine tool table, in the process of cutting wire electrode tightly * close to the edge of model for mobile track, thus cutting out the model * with the same shape and precision to work; another One is the optical tracking control, the cutting in line before the first parts in accordance with drawings by a certain ratio of enlarge depicts an electro-optical tracking maps, drawings will be processed when the machine electro-optical tracking placed on the stage, followed on the stage The first photo has to follow the ink line graphics track movement, and then through the use of electrical, mechanical linkage to control the machine tool table work together with the relative electrode wire Xiang Sixing do sports in order to cut out the pattern and shape of the workpiece to the same; a re - Is a digital process control, advanced digital automatic control technology, machine-driven process in accordance with the geometry of the workpiece before the parameters of good pre-processing CNC automatic completion of the processing, production do not look like without drawing board also plans to enlarge, in front of more than two Control in the form of higher precision processing and broad scope of application, at home and abroad for more than 95% of WEDM have been using digital technology.

根据对电极丝运动轨迹的控制形式不同，电火花线切割机床又可分为三种：一种是*模仿形控制，其在进行线切割加工前，预先制造出与工件形状相同的*模，加工时把工件毛坯和*模同时装夹在机床工作台上，在切割过程中电极丝紧紧地贴着*模边缘作轨迹移动，从而切割出与*模形状和精度相同的工件来；另一种是光电跟踪控制，其在进行线切割加工前，先根据零件图样按一定放大比例描绘出一张光电跟踪图，加工时将图样置于机床的光电跟踪台上，跟踪台上的光电头始终追随墨线图形的轨迹运动，再借助于电气、机械的联动，控制机床工作台连同工件相对电极丝做相似形的运动，从而切割出与图样形状相同的工件来；再一种是数字程序控制，采用先进的数字化自动控制技术，驱动机床按照加工前根据工件几何形状参数预先编制好的数控加工程序自动完成加工，不需要制作模样板也无需绘制放大图，比前面两种控制形式具有更高的加工精度和广阔的应用范围，目前国内外95％以上的电火花线切割机床都已采用数控化。

Structural differences among the three gelators are only in the varied amount of methyl groups on the benzene ring.

从分子结构的差异、亲溶剂作用、分子几何构型、相转变热焓以及溶剂极性等方面研究了三种亚苄基山梨醇衍生物凝胶剂在有机溶剂中的自组装和凝胶化机理。

In chapter 8, the complex of n-dimensional and geometry models of n+2 points are analyzed. The algorithm of high dimensional Delaunay triangulation is discussed.

第八章以四维空间为例分析了n维空间的单纯体构造和n+2个点的空间几何构型，探讨了高维空间的Delaunay三角化算法。

The separate velocity decides the shape and size during the sphere phase. Linear relative motion differential equation can be used to reduce the debris density model. Rope and spiral is distinguished from geometry, orbital maneuver theory is used to analysis the existence of pinch point and pinch line.

在球形阶段起主要作用的是分离速度；椭球形阶段可以利用线性化相对运动方程进行分析；绳形与螺旋线形在几何上有质变，但都有结点和结线，并可以利用速度增量理论分析和解释其存在的原因。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。