坐标

To solve this problem, it is necessary not only to consider the relationship caused by the difference of the method of projection, by that of the elements of ellipsoids and by that of the original data between the new and the old coordinates, but also to consider the observation errors caused by the two measurements.

解决这一问题必须考虑两种坐标间投影方法、椭圆体元素、起算数据等不同所引起的数学关系，而且还必须考虑到两次测量所引起的测量误差。本文所提出的数学模型确保以上所述数学关系准确，在此条件下，采用最小二乘法，使得由于地图投影等因素和测量误差所引起的新、旧坐标间的差异，一次加以处理。

The method for the motion regulation of the plate cam follower was provided on inverse design by use of given discrete point.

研究了从CATIA数字模型中获取平面盘形凸轮轮廓曲线上离散点坐标的方法，并以这些离散点坐标为依据，提出了反求机构从动件的运动规律的方法。

The simple algebraic procedure is used to form nearly orthogonal 2—D C—type and H—type bodyfitted grids for bodies of revolution, which is then used to generate 3—D C—O and H—O bodyfitted grids for fuselages.

五、用简单的代数方法生成了近于正交的旋成体子午面&C&型及&H&型贴体坐标网格，并以此为基础构造了三维任意截面机身的&C-O&型及&H-O&型贴体坐标网格。

Analyzing the relationships among the initial yielding point, significant yielding point, ultimate point and other key point in parameterless pushover curves, considering the seismic design level, the parameterless pushover curves are transformed to general pushover curves. Then the general pushover curves are converted to a spectral capacity curves for building, that is, a plot of spectral acceleration versus spectral displacement, using the simplified nonlinear static analysis method to estimate the seismic vulnerability of multistory brick structure and multistory and high rise reinforced concrete.

分析了无量纲坐标描述的推倒曲线中初始屈服点、明显屈服点及极限点等关键点之间的关系，考虑建筑物地震设防水准，将无量纲坐标描述的推倒曲线还原为以侧力及其位移描述的推倒曲线，进而将其转换为以谱加速度及谱位移表示的承载能力曲线，采用简化结构静力非线性分析方法，估计我国多层砖房及缺乏震害经验的多、高层钢筋混凝土框架结构房屋的地震易损性。

Gets the current Y position of an element based on page coordinates.

基于页面坐标获取一个元素当前的 X 坐标位置。

Using the perspective drawing formation principle,this paper makes comprehensive elaboration of one-point perspective,two-point perspectives and three-point perspectives formation principle with the matrix representation method,and infers one essential method to these three kinds of perspectives formation principle which the perspective reverses,uses this essential method to reverse the picture's some characteristic point coordinates,then completes the reconstruction object's three-dimensional model with these characteristic point coordinates and carries on the confirmation using the surface,the body,these two kinds of fundamental elements as examples.

利用透视图的形成原理，对一点透视、两点透视和三点透视的形成原理用矩阵表示的方法作了全面的阐述，并对这三种透视的形成原理进行反推，推导出透视反求的一种基本方法，利用这种基本方法反求出图片的一些特征点的坐标，然后用这些特征点的坐标来完成重建物体的三维模型，并以图像中面、体两种基本元素为例进行了验证。

A movable plane is built that is perpendicular to the projection of sightline in xz plane; a radial from camera position to mouse point is built and the mouse wheel is used to control the forward and backward movement of the movable plane along the sightline direction; the intersection point of the mouse radial and the movable plane can be moved to any position in 3D space by moving the moveable plane; the coordinate of the intersection point of the radial and the moving plane is calculated, taken as the new coordinate of the object to be moved which is added into the romance pipeline, and the object movement can be implemented.

论文摘要：为优化虚拟三维管理领域的物体移动操作，实现利用鼠标完成物体在三维空间中任意点的移动过程，引入可移动平面的概念，在三维空间建立垂直于视线在xz平面投影的可移动平面；建立1条从摄像机位置到鼠标位置的射线，由鼠标滚轮控制可移动平面在视线方向上的前后移动；通过移动可移动平面，使鼠标射线与可移动平面的交点可以到达三维空间中的任意位置；计算射线与可移动平面的交点坐标，将其作为待移动物体新坐标放入渲染流水线，从而完成物体移动。

In aspect of investigation on the binary phase splitting grating, Dammann grating, rectangle grating and also coordinate-phase modulate grating have been studied respectively. Detail analysis shows that the grating phase angle can inflect greater than coordinate to the splitting efficiency and equality rate.

在对二元位相型光学分束光栅的研究方面，在本论文对Dammann光栅、矩形孔径光栅以及坐标位相调制型光栅分别进行了研究，通过对光栅设计参数的变化对分束效率、分束均匀度的影响的分析可以发现光栅位相角对分束效率及分束均匀度的影响要比突变点坐标的影响大得多。

The process of radiative heat transfer in a three dimension rectangular furnace is simulated using discrete ordinates method.

本文首先对辐射传递方程的坐标进行离散，最后对三维矩形炉膛内辐射传递过程进行数值模拟，并与区域法进行比较，从而验证了离散坐标法的求解精度。

A general equation was derived for calculating the coordinates of the convergent point. The physical meaning of the coordinates was discussed from the point of view of thermodynamics. The ordinates of the two kinds of convergence are the same, i.e. the free energy change of the solutes is equal to zero.

建立了溶质平均收敛点坐标的计算方程，并从自由能变的角度表征了收敛点坐标的物理意义，阐明了收敛点的纵坐标相等的原因是溶质在收敛点处的自由能变为零。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐