查询词典 projection gradient method

Parallel projection possesses the advantage of retain some information of object;but by mono parallel projection many information will be lost.

平行投影会真实保留对象的某些信息，但单一的平行投影会损失对象的许多信息。

The projection on its parallel projection plane shows the true shape.

在所平行的投影面上的投影反映实形。

This approach utilizes the fact that if the centerline of target image gets through the center point of the image plane,perspective projection and parallel projection must have the same image-forming property.

依据在目标成像的中轴线通过像面中心的时候，平行投影法和透视投影法有相同的成像特征这一事实，提出了一种无模型误差的修正平行投影法。

After understanding the principle and related algorithm of parallel ray projection, I proposed Project-shift algorithm, that based on two steps: making a projection model and shifting other images.

在了解平行光投影性质及相关算法的基础上，利用这些特性，提出投影-平移最大密度投影算法，该方案主要通过建立投影模板和对每层图像的平移处理来完成。

Parallel projection transformation and perspective projection.

投影变换有平行投影和透视图。

It is found that thediffraction efficiency of the beam whose projection is antiparallel to the optical axis isdifferent from that of the one whose projection is parallel to the axis inphotorefractive crystals with unidirectional fanning.

发现具有单向光扇的光折变晶体其二波耦合衍射效率沿正负光轴两个方向明显不等。

The dissertation mainly studied the key techniques which are the mathematics modeling of cone-beam CT simulation system, and the parallel rapid simulation of the projection imaging with STL phantom models. Then a cone-beam CT simulation system platform was developed, which provided the projection simulation for compounding phantoms, non-point X-ray source and multiple X-ray spectrums.

本文重点研究了锥束CT仿真系统的数学建模、STL样本模型投影成像的并行快速仿真等关键技术，开发构建了一个支持混合样本、非点光源与多光谱投影仿真的锥束CT仿真系统平台。

Many analysis technology and space data are designed by the two-dimensional coordinates or plane coordinate, and used plain map projection methods to storage space coordinates, so many times we all need three-dimensional map projection to convert 3D geographical coordinates into the plane coordinates.

许多分析技术和空间数据都是针对二维坐标或平面坐标设计，以平面地图投影的方式来存储空间坐标，因此很多时候我们都需要利用地图投影将三维的地理坐标转换为平面坐标。

The modelview transform is used in the same way as it is in the OpenGL viewing pipeline, to move the viewer to the origin and the projection centered along the negative z axis. In this case, viewer can be thought of a light source, and the near clipping plane of the projection as the location of the texture image, which can be thought of as printed on a transparent film.

模型/视图变换的作用和它在OpenGL 观察管道里的作用是一样的，它将观察者沿-Z方向移动到原点和投影中心，在这种情况下，观察者就好比是是光源，近裁剪平面好比是需要投影的纹理图象的所处的位置，纹理图象可以被看作一个在投影的透明胶片。

The modelview transform is used in the same way as it is in the OpenGL viewing pipeline, to move the viewer to the origin and the projection centered along the negative z axis. In this case, viewer can be thought of a light source, an d the near clipping plane of the projection as the location of the texture ima ge, which can be thought of as printed on a transparent film.

模型/视图变换的作用和它在OpenGL 观察管道里的作用是一样的，它将观察者沿-Z方向移动到原点和投影中心，在这种情况下，观察者就好比是是光源，近裁剪平面好比是需要投影的纹理图象的所处的位置，纹理图象可以被看作一个在投影的透明胶片。

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。