其次有关波前面的描述和三维坐标系之间的变换也是个难点。
Moreover, it is difficult to implement a description of the wave front and the transformation of three-dimensional system of coordinates.
结果：建立了三维坐标系下的可从任意视角观察的颅颌面硬组织模型。
Results: The reconstructed image can be seen from an arbitrary viewing point.
前言：目的建立用于全口义齿人工牙的三维坐标系并测量其相应参数值。
Objective:To establish three-dimension (3D) rectangular coordinate and to obtain relevant parameters of artificial tooth morphology for full denture.
用Unisight软件在MPR相下获得各点原始三维坐标值，通过数学计算得到各测量点在测量三维坐标系下的坐标值。
UNISIGHT is used to get the original value of coordinates in the MPR phase. The value of the reference frame is gotten by mathematic calculating.
空间仿射坐标系的平行投影问题在计算机图形识别、跟踪目标及三维实体重建中具有重要意义。
Parallel projection of the affine coordinate system has a significant impact on computer graphics recognition, object's tracking or solid model reconstruction.
在水斗三维贴体坐标系中，还推导了流体粒子在水斗曲面上的运动控制方程。
The governing equation of motion for fluid particles moving on bucket was deduced on BFC at the same time.
方法：以股骨头、髋臼的中心为原点建立股骨及骨盆的右手正交坐标系，将髋关节周围起于骨盆的肌肉的股骨、骨盆附着点的三维坐标位置进行了测量定位。
Methods: By reference to the right-handed coordinate system, the three-dimensional positions of the femoral and pelvic attachment of the muscles related to the hip joint were all measured.
在适体坐标系中采用有限差分法对错排圆管管片式换热芯子的三维层流流动及其换热特性进行了研究。
Under the body-fitted coordinates, a study of three-dimensional laminar flow and heat exchange characteristics of staggered round tube bank fin is carried out through finite difference method.
开发了一个三维柱坐标系下冷却壁传热计算的计算机软件。
Developes a three-dimensional heat transfer program in the cylindric coordinate system.
根据圆柱形坐标系的三维弹性力学控制方程，导出其状态方程。
Based on control equation of three dimensional elasticity in cylindrical coordinate system, the state equation is derived.
利用已有的三维双相材料位移基本解，给出了在与界面斜交坐标系下位移基本解的一般表达式。
Relied on previous data, the general expression of displacement fundamental solution for three-dimension bi-materials under coordinate system oblique to interface is given.
结论眉间-枕外粗隆可作为三维体表坐标系。
Conclusion Glabella-external occipital protuberance line coordinate systems on body surface are available.
最后通过图像处理和立体视觉的方法来计算出平面工件在机器人基坐标系中的三维信息。
Finally the workpiece's 3d coordinates in the basal coordinate of the robot are calculated by image processing and stereo vision.
其次根据宿主网格模型定义三维构图知识，包括构图坐标系类型和其他纹理映射参数；
The second is defining the 3D design knowledge of host polygonal model, including mapping coordinate type and other parameters.
采用该算法生成的直角坐标系下网格坐标及一维、二维和三维网格图型不仅精确，而且快速有效。
These grid orthogonal coordinates and one, two and three dimensional mesh patterns, which are produced by using the algorithm, are not only accurate, but also being generated efficiently.
本文采用单摄像机与3-D示教器（由四个LED构成）组成的仿真三维视觉传感装置来完成空间坐标系中物体的空间位置和姿态的测量。
In this paper, a TV camera and a 3-D teaching device with four LEDs attached to measured Point on the object are employed to acquire the 3-D information of the measured point.
对三维图形计算机显示的基本原理进行了讨论，详细介绍了坐标系变换、投影变换和明暗处理及光照模型的基本原理。
Then, the basic principles of drawing 3d graph by computer are discussed, particularly explained the fundamental theory of coordinate transform, projection transform and light model.
空间仿射坐标系的平行投影问题在计算机图形识别、跟踪目标及三维实体重建中具有重要意义。
Parallel projection of the affine coordinate system has a significant impact on computer graphics recognition, objects tracking or solid model reconstruction.
由摄像机标定参数，进一步计算出各特征点在机器坐标系中的三维坐标；
Then, by using the camera calibration parameters, 3D coordinates of each feature point in the machine coordinate system were calculated.
本文在广义坐标系中采用投影和透视变换理论建立了网条结构光三维视觉检测模型。
Using projective and perspective transformations, the mathematical model of 3d vision inspection for grid structured light is established in homogeneous coordinate system in this paper.
应用计算流体力学(CFD)方法对转动坐标系下的三维环形密封流场进行了准稳态数值模拟，在此基础上进行了转子动力系数的计算。
Three dimensional annular seal flow field was simulated quasi-steadily with computational fluid dynamics (CFD) method in a rotating reference frame. The Rotordynamic coefficients were calculated.
该文主要论述了在潜艇航行训练模拟器三维视景仿真中，把三维模型投影到屏幕坐标系当中的方法。
This paper puts forward the method of locating the 3D model in the screen coordinate in the design of the visual system of a submarine voyage training simulator.
利用三维柱坐标系时域有限差分(FDTD)方法计算了各向异性地层中电磁脉冲测井响应。
The response of electromagnetic pulse logging in anisotropic formation was simulated with three-dimensional finite-difference time-domain (FDTD) method in cylindrical coordinate system.
通过坐标系的变换和引入辅助向量获得了解析的捕获域和截获时间，并在三维空间内对这种追踪导引过程进行了仿真验算。
In this paper, however, the capture set and time of interception are obtained analytically by coordinating transformation and exploiting of accessorial vector.
采用有限体积法在桨叶固接坐标系直接求解三维欧拉方程。
The approach is to solve the Euler equations in a rotor fixed frame of reference using a finite volume method.
为了高质量准确地对物体多视角三维图象进行快速对齐复位，提出了一种将多个视角三维自然曲面数据精确对齐复位于同一坐标系中的新型迭代方法。
A novel iterative approach is proposed for precise aligning multiple 3D images captured from difference views of a natural object surface in one reference coordinate system.
实物坐标系经过一系列变换通过三维显示的二维投影面与显示坐标系统一。
World coordinate that had undergone some transform such as translation, and rotation was unified with display coordinate through 2D projection plane of 3D display coordinate.
实物坐标系经过一系列变换通过三维显示的二维投影面与显示坐标系统一。
World coordinate that had undergone some transform such as translation, and rotation was unified with display coordinate through 2D projection plane of 3D display coordinate.
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