查询词典 reference ellipsoid

An oblate ellipsoid of revolution (the "spheroid") which approximates the geoid is the reference for geodetic latitude determinations.

近似地球体的一个旋转椭球面，即大地纬度测定的一个参考面。

Guan Lingyun Upper and lower bounds of effective bulk and shear moduli for elastic composite materials with general ellipsoid of revolution inclusion have been calculated by using the approximate formulae ,which related to the effective moduli of composite materials with imperfect interface under finite deformation ,in reference .

应用文献〔13〕中有限变形下非完美界面弹性复合材料有效模量的近似公式和微分几何方法，计算了含一般旋转椭球体夹杂弹性复合材料有效体积模量和有效剪切模量的上下限界。

Because these two coordinates of the reference ellipsoid different coordinate transformation is too much trouble to use EXCEL to prepare can increase the application process, I hope all of you to help.

因为这两个坐标系的参考椭球不同，坐标转换比较麻烦，用EXCEL编写可以增加程序的应用性，希望对大家有所帮助。

A new method of transformation between the three dimension geocentric coordinate system and independent coordinate system in adjustment of GPS networks is proposed.Compared with the conventional methods,it is not based on the 54 or 80 national reference ellipsoid.

对于区域性独立坐标系与三维地心坐标系之间的互相转换，提出了一种在GPS网平差中不以54或80国家参考椭球为过渡的平差转换方法。

In adjustment calculation of highway control survey, field observation values must be changed onto reference ellipsoid and then onto Gauss projection plane, at last the control network would be adjusted in this plane.

在公路控制测量的平差计算中，须将外业观测值化算为参考椭球面上的观测值，然后再化算为高斯平面上的观测值，并在高斯平面上进行控制网的平差计算。

The results show that,after considering the Geodi-spheroid separation(the reference ellipsoid and the EGM96 Geoid are used as vertical datum for GPS and SRTM respectively),the height differences between SRTM and GPS are very small.

结果显示，经过大地水准面差距补偿后(GPS和SRTM分别采用参考椭球面和EGM96大地水准面作为高程基准)，SRTM和GPS高程的差异非常小，基本上在0附近波动。

On the basis of Earth surface space using reference ellipsoid as height basis, map space using Gauss-Kruger projection plane as height basis, a viewpoint is proposed that map projection actually establishes corresponding relationship between the height bases of two different spaces above. From the viewpoint of projection and visible representation, the relationships among earth surface space, RS imagery space and map space are analyzed; the differences among different representations of earth surface space are identified theoretically; virtual reality is applied to the representation of land surface space, and a prototype of real 3D virtual reality system based on spatial information is developed. By means of digital simulation, virtual reality representation of land surface space in visual image space is realized.

在以参考椭球面为高程基准面表征地表空间、以高斯-克吕格地图平面为高程基准面表征地图空间的思想基础上，提出了地图投影实质上是建立两个空间的高程基准面之间关系的观点；从投影和可视表达的角度，分析了地表空间、遥感图像空间、地图空间之间的关系，从理论上区分了对地表空间的不同表达方式之间存在的差别；将虚拟现实技术应用于地表空间的表达，研制了空间信息三维虚拟现实系统原型，利用数字模拟技术在视像空间实现了对地表空间的真三维虚拟现实表达。

At the same time, other research on the followings: how to choose a proper replace project plane, discussing replace region, making out reference ellipsoid parameters, transferring the geodetic coordinate system to the regional coordinate system, seeking for the proper way to choose coordinate system.According to the research on the second degree GPS control nets of WeiHai, a fully and systemic account is generated from layout、 choosing a coordinate system and checking the original datum to the objection and adjustment computation.

本文通过对威海市城市二等GPS控制网的研究，从设计、选择坐标系统、起始数据检验、到观测、平差计算等工序作了系统的论述；通过威海城市二等GPS控制网高程拟合问题的讨论，研究高程拟合的适用范围，选择合适的高程异常已知点，尤其对于高程异常变化剧烈的山区，高程拟合的精度问题进行了研究。

Oceanographers use it to study ocean currents. Because the instantaneous SSH above a reference ellipsoid can be computed from satellite altimetry, MSS is derived from SSH.

本文首先讨论了由多种测高数据建立平均海面高模型的理论与方法，考虑了海平面高格网化的方法，然后联合利用多种测高数据确定了中国海及邻海（北纬1oN ～41oN ，东经103oE ～137oE ）的格网分辨率为2￠′2￠的平均海面高模型。

This method represents the virtual objects in Euclidean space instead of in affine space, which is consistent with the popular graphics rendering tools such as OpenGL and is more common in practice. A new classification based local and global tracking strategy to match features between the reference image and the currently frame directly is presented, which enables the augmented reality system working effectively even under large changes of viewing angles. A novel affine coordinate system definition method based on a collection of feature points is also proposed, which makes the tracking method effective even when not all the reference points are detected during the whole process, as long as there are at least four pairs of reference points correspondences.

该方法以仿射变换为桥梁来建立欧氏空间下的摄像机坐标系与世界坐标系之间的变换关系，它与OpenGL等当前流行的图形渲染工具一致，具有更强的通用性；采用基于分类的自然特征匹配策略，能够在视角和视点发生大幅度变化情况下依然正常工作；提出基于特征点集合的仿射坐标系定义方法，使增强现实系统在最小配置下只需4点追踪成功即可完成注册，比需要6点的透视投影方法具有更好的健壮性和精确性。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。