查询词典 three-dimension space

In this paper,from the global viewpoint we first define the nonlinear control system on a two dimensional surface in the three dimensional Euclidean space, give the represwentation of the state equation under a loca coordinate sysgtem of the surface, and study the connectin between the equilibrium state of the nonlinear system and the egodesics on the surface.

我们首先从整体化的观点定义了一种建立在三维欧氏空间的二维曲面上的非线性控制系统，并给出了在曲面的局部坐标系下非线性系统状态方程的表达式，研究了非线性系统的平衡态与曲面的测地线之间的关系。

Time, space and conscious state are three core concepts in Bergsons time philosophy.

时间在柏格森的哲学中占着核心地位。

The three astronauts spoke to the press from behind a glass screen at the Hotel Cosmonaut in Baikonur as they are being held in quarantine for fear of being contaminated ahead of their space flight.

当天的记者招待会在拜科努尔的宇航员宾馆举行，三位宇航员在一个玻璃屏幕后回答了记者的提问。为了防止在太空飞行前被感染，目前他们正处于隔离状态。

In the paper, the kinetic characteristic of three models of PSO are analyzed. The largest covering space of the Gbest model and the Pbest model are deduced without new information.

分析了PSO算法中的三种粒子模型(Gbest，Pbest，Commom模型)的运动特性，给出了Gbest模型和Pbest 模型在没有新息获取时，单信息条件下的最大搜索空间。

The book also includes interviews covering various aspects of space life sciences research, a chapter profiling NASA's relevant international and domestic collaborative efforts, and a chapter discussing the process of flight experiment implementation. Three appendices describe, respectively, the methods and results of over 200 flight experiments, resulting science publications, and associated flight hardware with illustrations.

它还涵盖空间生命科学研究的各个方面简介，一章包括NASA的相关国际和国内合作成果，一章讨论太空飞行试验实施的过程，三个附录分别描述200多次飞行试验的方法与结果，由此引发的科学出版物，以及相关飞行硬件，并附有插图。

I have to share my office with other three people, that's why the space is so cramped.

我必须和另外三个人公用我的办公室，所以我们的空间很狭窄。

Analyse the tooth geometry of Klingelnberg Cyclo-Palloid spiral bevel gear.,according to the relative position and kinematic relation of the cutter heads,virtual crown gear and the processed wheel blank,established the system of coordinates of the gear cutting, dedcuced the tooth face equation of the virtual crown gear, according to relations of the gear cutting and space theory of engagement, deduced the tooth face equation of klingelnberg Cyclo-Palloid spiral bevel gear, and drawing the three-dimensional graphs of the virutal crown gear and Klingelnberg Cyclo-Palloid spiral bevel gear according to the design and setting parameters.

根据铣齿加工中刀盘、摇台和轮坯的相对位置和相对运动关系建立了切齿啮合坐标系，由矢量的旋转推导了产形轮齿面方程；根据空间啮合原理和切齿啮合关系推导了被加工齿轮的齿面方程；由设计参数和铣齿调整参数计算得到齿面离散数据，绘制了产形轮和摆线齿锥齿轮的三维齿形。

At and , we can get a univariate cubic equation in and its three roots . By the dependence of the roots and the coefficients of the equation, we can choose corresponding space points ( such that the distance is the shortest from to the point with parameters and . Thereby we can get all the data of discrete points on the cubic curve of blending surface at . Again we denote the maximum value and minimum value of planar parameter with which meets by and respectively.

利用根与系数的连续相依性，可以选相应的空间点使其距离的圆截线上对应值的点最近的两个根，从而得到处拼接曲面的截线的离散点的数据并确定出与相截的平面参数的最大最小值类似地由处拼接曲面截线的离散数据得到处的离散数据，这样可以依次计算出拼接曲面上对应所有参数点的离散点的坐标。

A platonic solid is essentially a three-dimensional form. It is a volume, a cuboid, a body, and it is in space.

一个纯体块实质上是一个三维体，它是空间里的容量、立方体或体积。

Researches the submanifolds in nested space,for constant curvature Riemannian submanifold in quasi-constant curvature manifold and pseudo-umbilical submanifold with parallel mean curvature vector in constant curvature Riemannian submanifold,presents three sufficient conditions for this pseudo-umbilical submanifold to be total-umibilical submanifold,generalizes the result of JI Yongqiang.

对于拟常曲率流形中的常曲率黎曼子流形以及常曲率黎曼子流形中具有平行中曲率向量的紧致伪脐子流形，给出了这种伪脐子流形是全脐子流形的3个充分条件，推广了纪永强的相关结果。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。