轨迹线

Theorem 2: the locus of foot point of the perpendicular line of between the origin and the tangent line of the cylindrical spiral is on the simple leaf camber hyperboloid of one sheet .

定理2 由坐标原点至圆柱螺线的切线所引垂线的垂足轨迹在单叶双曲面上。

Based on the causing principle of hypocycloid ,this paper discusses the track of geometric elements in moving circle plain under different conditions, theapplication of hypocycloid in mechanical engineering is also briefly demonstrated.

本文根据内摆线形成原理，研究和讨论不同条件下动圆平面上的不同几何元素随动圆运动时形成的轨迹，并简要说明了内摆线在机械工程上的应用

The Belgian Malinois single tracks at a fast gait, the legs, both front and rear, converging toward the center line of gravity, while the topline remains firm and level, parallel to the line of motion with no crabbing.

在快速跑动时，比利时玛利诺的足迹为单一轨迹，前后肢都由于重力作用而聚拢在身体中心线下。背线水平而稳固，与运动方向一致。

Finally, we illustrate the applications of motional cycloidal track in the security pattern design.

最后介绍了扩展后的摆线运动轨迹曲线在安全底纹防伪设计领域中的应用。

The nightside sky is an infinite lattice of shining hairlines that interlock planetoids and track er ratic spirals of glowing gnats.

背阴面的天空是一个由闪耀的细线交织而成的广阔网络，串联着许多小行星以及牵引着许多以螺旋形轨迹漂浮着的细小物体。

Based on image we study the tool path generation technology and problem of tool path planning. We put forward an algorithm for self-discrimination of island relation and an automatic intersected method of the region machining unit, which can judge the relationship among any plane obturate contour line effectively and swiftly. We also study the tool path generation technology of two-dimensional machining, basso-relievo machining, three-dimensional lifting-pen machining. Meanwhile, we put forward an optimize approach of tool path, which improve the efficiency of engraving.

研究了图像的刀具路径生成技术与轨迹规划问题，提出了基于射线的岛屿关系自动判断和区域加工单元的自动分割方法，有效、快速地判断了平面任意封闭轮廓线之间的关系，研究了平面任意区域填充加工、浮雕加工、三维提笔加工的刀具路径生成的技术，提出了刀具路径优化方法，提高了雕刻加工的质量和效率。

We put forward an algorithm for self - discrimination of island relation and an automatic intersected method of the region machining unit , which can judge the relationship among any plane obturate contour line effectively and swiftly . we also study the tool path generation technology of two - dimensional machining , basso - relievo machining , three - dimensional lifting - pen machining . meanwhile , we put forward an optimize approach of tool path , which improve the efficiency of engraving

研究了图像的刀具路径生成技术与轨迹规划问题，提出了基于射线的岛屿关系自动判断和区域加工单元的自动分割方法，有效、快速地判断了平面任意封闭轮廓线之间的关系，研究了平面任意区域填充加工、浮雕加工、三维提笔加工的刀具路径生成的技术，提出了刀具路径优化方法，提高了雕刻加工的质量和效率。

The first step is to generate tool paths in the NCP system in an off-line mode.

第一步是将产生刀具轨迹在NCP的系统在离线模式。

The broken line of the facade is continued into the central rooms of the house, where like the ball in a pinball machine it shoots around to draw dynamic balconies inside its square volume.

立面上的折断线一直蜿蜒盘旋到住宅中心，就好象弹球游戏桌里被发射的弹球来回反射的运动轨迹，为方正的体量勾划出富有动感的多样露台来。

The outside sea wave streams into near the shore and shallow water area, being subjected to a submarine friction function, the wave 锋 becomes abrupt, the trough of wave become slowly, the fluid matter orders sport track to present back and forth fluxion, and to shore enter the current velocity degree is usually bigger than offshore reflux speed, causing bottom sediment clean to shore porterage, and is aroused a shore wave of ascend the blunt water current take to the seashore on-line pile up.

外海波浪传入近岸浅水区，受到海底的摩擦作用，波锋变陡、波谷变缓，水质点运动轨迹呈现往复流动，而且向岸进流速度通常大于离岸回流速度，导致底部泥沙净向岸搬运，并被激岸浪的上冲水流带至海滨线上堆积。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。