查询词典 metric topology

The Major Planet Carriers Topology Optimization needs to submit to the intensity conditions when its Structure Stiffness and Nature Frequency change as little as it can.

大行星架结构拓扑优化需要在满足强度条件的前提下，使得结构的刚度、固有振动频率改变最小。

The new rT joint not only has two rotation axes that intersect at right angle,but also has another rotational degree of freedom which can be used to modify the assembly of other joints.This can change the mobility of the parallel mechanisms that assembled with the new rT joints and leads to two types of metamorphic paralllel mechanisms:In the first type,the mechanism changes its topology by turning the new rT joints in all limbs into different configurations which reconfigures the constraints within the limbs or the assembly of all the limb constraints.This change of mobility is completed by two cases.One is illustrated by a 3PS and a 3C parallel mechanism,by altering the rT joint into different configurations there will produce or reduce local degrees of freedom and thus change the constraits to the moving platform.This qualifies the 3PS and 3C to have variable mobility from 3 through to 6 and from 1 through to 6 respectively.

该铰链除了一般Hooke铰的两个轴线互相垂直相交的旋转自由度外，还增加了一个可以调节该两个轴线之一的姿态的一个旋转自由度，通过此自由度调节该rT铰到不同的装配构型，可以改变用其装配的并联机构的自由度，由此产生两类新型的并联变胞机构：一类是机构的各个支链中都有rT铰，该铰链的不同构型可以改变各支链对运动平台的约束或整个支链组的组合形式而改变机构的自由度状态，3PS和3C属于前者，通过调节rT铰到不同构型可以使其支链产生或消失局部自由度，从而减少或增加支链对运动平台的约束，使得并联变胞机构3PS和3C分别具有自由度从3变到6和从1变到6的能力；3P属于改变支链组组合形式的机构，其rT铰的不同构型将改变整个支链组的几何约束组合，使得并联变胞机构3P可以有三转动、三平动或三平移(来源：ABCded9de论文网www.abclunwen.com)一转动的自由度形式。

A network topology in which nodes are connected to a single cable with terminators at each end.

一种网络技术，节点连接到一根电缆中，端接器连接电缆的两头。

A bay-oriented method for the power network topology analysis is proposed, in which the substation is divided into collections of interrelated equipment, and all the possible states of the bays are analyzed topologically with the results stored in the database for reference.

提出了一种面向间隔的电力网络拓扑分析方法，将变电站一次主接线划分为一些相互关联的设备的集合，对间隔的各种可能的状态进行了拓扑分析，并将结果保存在数据库中以供查询。

MGE contains tools for building and maintaining topologically clean data without the processing and storage overhead of building and maintaining topology.

MGE包含着建立维持拓补清理数据的工具，而不用在建立维持拓补前进行处理和存储。

This paper is mainly focused on data segmentation and model reconstruction problems in Reverse Engineering fields,The main contents include Sharp Featurebased quadrilateral domain extraction from a mesh model,connectivity between multiple B-spline surfaces,fast algorithm for fitting multiple B-spline surfaces on model with arbitrary topology,setting up a hierarchically structured constraintbased data model and binary cubic interpolation of splines with C~2 connectivity for type-Ⅱtriangulations on rectangular domain.

主要内容包括：网格数据的数据分割及矩形片的提取、多个B样条曲面间光滑拼接、任意模型的多个B样条曲面拟合的分块快速算法、基于二元三次样条函数在TYPE-Ⅱ分割下的曲面重建方法、基于约束和层次结构的模型表示及一个小型逆向工程软件系统的建立等。

Controlling polymer topology presents challenging synthetic obstacles as well as exciting opportunities for tuning macromolecular properties.1 In particular, nanoscale molecular architectures with welldefined shapes and dimensions may provide significant advancements in areas such as drug delivery and nanotechnology.

聚合物拓扑结构的控制为大分子性质的调控既提供了具有挑战性的合成障碍，又提供了一个令人激动的发展机遇。1 另外，具有精确可调控外形和结构的纳米分子结构可能极大地促进药物缓释和纳米技术领域的发展。

They also pointed that the existence of an affine atlas is soley determined by the topology of the Riemann Surfaces.

同时也指出了样条函数的存在性与黎曼面的结构有着深刻的关系。

Structural topology optimization is formulated in terms of the nodal variables on the level set function , which is converted to 0-1 variables by Heaviside function regularized by the sigmoid function.

利用有限元离散后的水平集函数的节点值作为拓扑设计变量来求解连续体拓扑优化问题。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。