三点的

The system gets two image of one object with two CCD, thus obtains depth from two CCD"s parallax. After investigating the operation spot and discussing with surgeons we use LED as markers, and get the marker"s 3-D position with a non-contact optics orientation method. After calibrating the CCD, processing the image, the system can figure out marker"s areal coordinates, get marker"s 3-D coordinate in dummy world coordinate system, thereby obtain instruments 3-D position and orientation. After the coordinate transformation and a series of orientation calculation, operation navigation comes true.

运用两个摄像机对同一目标从不同位置成像，进而从视差中恢复距离；通过对手术现场的仔细了解与手术医师的反复商榷，使用LED作为标志点，利用非接触式光学定位方法提取空间点位置信息：通过对摄像机的标定、图像处理及目标点重心的计算，求出空间点在虚拟世界坐标系下的三维坐标，从而确定了手术器械等的空间位姿，通过空间坐标转换及一系列定位计算，完成了手术导航实验系统。

In view of the demand of computerized eye-glasses-wearing system, an approach to match two dimensional (2D) human head images with 3D glasses frame graphics in 3D space has been proposed. First, the operator points out three or six key points, which are used to locate 3D eye-glasses frame, on the human face image displayed on the computer screen interactively.

论文针对计算机化眼镜配戴系统的要求，提出了一种在三维空间匹配二维人头图象和三维眼镜图形的方法，即通过人机交互方法，由操作者在显示于计算机屏幕上的二维人头图象上，指出确定三维眼镜位置的三个或六个关键点的二维坐标及其三维对应点，从而可以近似求出人面朝向及视点坐标，再用相应位置上的三维通用人头图形替换二维人面图象，计算人面和眼镜间的遮挡关系并显示，从而完成二者的空间匹配。

is applied to construct the three-dimension model for finite element analysis. Short circuit and open circuit of the field winding and the teeth and slots structure of the rotor are discussed. An appropriate three-dimensional mesh is made. The corner point problem of conductor is eliminated. Furthermore, a new memory structure for sparse complex matrix and a PCCG method based on it are introduced to save memory and computation time.

在汽轮发电机失磁异步运行转子三维涡流场数值计算模型中，应用了〓法建立了三维有限元计算模型，考虑了转子绕组的开、短路状态及转子齿槽结构，形成了合适的三维剖分网格，解决了三维电磁场有限元计算中角点奇异的问题，创立了一种新的稀疏矩阵的存储格式以及基于该格式的预处理复数共轭梯度法从而减少内存开销和加快了求解速度。

The following values was measured: angle of cusp line between the second and third molar, impact state and depth, distance from Rickett's Xi to distal cusp of third mandibular molar along the occlusal plane, anterior border of ramus to the third mandibular molar, distance from projection of distal contact point of maxillary third molar to intersection of pterygoid vertical on occlusal plane.The change between pre-and post-treatment was calculated and analyzed with SPSS10.0 software package.α angle, Xi-LTM, R-LTM, R-LTM were tested with independent-sample t test, impact state and depth was tested with Chi-square test. Influence of age on the values was also evaluated.

测量治疗前后的第二、第三磨牙牙尖连线角度、阻生状态和深度，Rickett's Xi点到下颌第三磨牙远中尖距离、下颌支前缘到第三磨牙远中尖距离、翼上颌裂切线到上颌第三磨牙后缘的距离及上、下磨牙的前移量，计算治疗前后各变量的差值，采用SPSS10.0软件包进行统计学分析，α角、Xi-LTM、R-LTM、R-LTM用t检验，阻生状态和深度用χ^2检验，比较年龄因素对各指标的影响。

The press frame, as the fundamental support for the component of forming press, is foundation of installation and fixation for other parts.

三梁四柱式多点成形压力机，是一种主要的多点成形设备，已研制成功多台。

The press frame, as thefundamental support for the component of forming press, is foundation ofinstallation and fixation for other parts.

三梁四柱式多点成形压力机，是一种主要的多点成形设备，已研制成功多台。

If c is the largest slope of the tangents from the point to the circle , find the value of c.

6 图三 Figure 3 现有点和圆。如果c是通过点与圆相切直线的最大

The path the racket travels along looks very similar to a "C." By doing these three things at the same time you'll get to your contact point, which is a little bit out in front of your body and about waist-high.

拍头挥击路线象一个&C&字形，在同一时间完成上面三件事，你将找到你的击球点，击球点是约与腰齐高，身体前面一点点地地方。

Operation: The performer puts the thumb, forefinger and middle finger on muscles of both sides "Ji Tu" point to rub repeatedly up and down for six times, then attacking and hooking up with forefingers and middle fingers on "feng chi" and "feng fu" points meanwhile "Wan Gu" point, then holding the Back of head with both four finger left, with strength from both hands at the same time and pulling to the bosom, then slowly sending back .

操作：施术者一手拇指与食指，中指分别置于颈部棘突两侧的颈肌部位，由上至下反复操作揉捏至三十六次。然后，再用双手食指，中指分别勾点住&风池&&风府&穴，同时向怀中用力牵拉，然后，再用双手中指勾点住&完骨&穴，其余两手四指抱住受术者后脑处，双手同时用力，向术者怀中牵拉，然后缓慢收手回送。

Compared with the previous three games, the Hong Kong delegation of this washed Games with more gold medal point and point.

与以往三届比赛相比，香港代表团本届全运会有更多的冲金点及夺牌点。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。