三维空间

I met some programmers at a party in Tokyo and they showed me a system of connectible virtual 3D spaces built, like FloatingWorld, with the Open Graphics Library software.

在东京的一个聚会上，我遇到几个编程师。他们给我看了一个虚拟三维空间结构的互连系统，和FloatingWorld有点像，是采用OGL软件编程的。

To construct harmonious city of saving form, the usage of urban three-dimension space is a significant research project.

在我国建设集约型和谐城市的宏观背景下，城市三维空间利用是值得思考的问题。

The problems of point - line - plane - volume; the facts of square - circle - triangle; the mysteries of central - peripheral - frontal - oblique - concave - convex; the right angle and perpendicular; of scale and position; the interest in post- lintel, wall-slab, vertical-horizontal; the arguments of two-dimensional and three-dimensional space; the extent of a limited field; the meaning of implied extension; the meaning of plan, of section, of spatial expansion - spatial contraction - spatial compression - spatial tension; the direction of regulating lines, of grids; the relationships of figure to ground, or number to proportion, of measurement to scale, of symmetry to asymmetry, of diamond to diagonal; the hidden forces, the ideas of configuration; the static, the dynamic: all these begin to take on the form of a vocabulary.

点-线-面-体的课题；正方形-圆形-三角形的事实；中央-边缘-正对-倾斜-凹入-凸出的奥秘；直角与垂直；尺度与位置；柱-梁、墙-板、竖直-水平的旨趣；两维与三维空间的思辩；局促场所的极限；暗示延伸的含意；平面、剖面、空间扩充-空间收缩-空间挤压-空间张拉的意义；控制线与网格的方向；图与底、数字与比例、尺寸与尺度、对称与非对称、菱形与对角线的关系；暗藏的力量、构型的想法；静态、动态━这一切都将发展成为语汇的形式。

According to the law of conservation of sample energy during solidification, under the condition of Newton's cooling, the ordinary mathematical equation of cooling curve was analized, and a theoretical method calculating solid phase fractions and latent heat was put forward on the basis of characteristic α value.

在对碳含量、硅含量和碳当量作三维空间投影分析的基础上，根据实验数据回归出了计算铁水碳含量、硅含量、碳当量、磷含量、抗拉强度、硬度和共晶度的数学模型；为了提高对硅含量的测量精度，提出了分段定硅的技术方法。

For aeronautical static converter then three-phase unbalanced load, made use of four-leg three-phase main circuit topology solution based on abc coordinates of the three-dimensional vector control, so that the switch to select the vector and duty more than a simple calculation, a significant reduction in the modulation of the complexity of the algorithm.

为解决航空静止变流器在不平衡负载情况下不能正常工作的问题，提出了三相四桥臂主电路拓扑解决方案，并采用基于abc 坐标系下的三维空间矢量调制，使开关矢量的选取和占空比的计算简单化，显著降低了调制算法的复杂性。

The Cholesky decomposition of cross spectral density matrix was approximated and reduced, and then the modified spectral representation method is efficient and requires less computer memory, which is suitable for simulating spatial wind fields of long span bridges.

针对现有Deodatis方法模拟大跨度桥梁空间脉动风场中存在的计算量问题，通过对谱分解矩阵引入插值近似，减少谱分解的次数，从而提高该谐波合成法的计算效率，并节省内存花费，实现了对三维空间脉动风场的有效模拟。

On the other hand, a positive curvature would imply that three-dimensional space is finite and closed.

另一方面，一个正的曲率将必然说明三维空间是有限的，而且是封闭的。

In this thesis, enlightened by the curve surface fitting in three-dimension space and combined with device gamut characteristics, a two variable high order polynomial method and its mathematical model were developed.

本文基于三维空间中曲面拟合的思想并结合色域特征，提出了色域的双变量高阶多项式解析描述方法及其数学模型。

The vibration of drilling string in horizontal well is closely related with the overall length of the drill string and structural shape. In this paper ,a mechanical model of longitudinal vibration of drill strings is established by studying the overall drilling string,seeing a hole as arbitrary bending curve in three-dimensional space.

本文以整体钻柱为研究对象，将井眼视为一条可以任意弯曲的三维空间曲线，建立了水平井钻柱纵向振动分析的力学模型。

It is obviously impossible to form a mental picture of what a curved three-dimensional space would look like.

要在我们脑海中形成一幅弯曲的三维空间画面是怎么样的，很显然这是不可能的。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。