查询词典 geodesics

Anosov generalized the work of Hadamard to geodesics on negatively curved manifolds with variable curvature.

Anosov 将 Hadamard 的关于常负曲率表面关于测地线的研究推广到变曲率。

The problem of sub-Riemannian geodesics is a Lagrange problem with constraint. How to describe the constraint condition "γ'∈ D, a. e." is a difficult problem.

次黎曼测地线问题是变分学中的一个有约束的Lagrange问题，但在变分的过程中有个难点―如何推出约束条件&γ'∈D，在上几乎处处成立&的解析式。

These straight lines are called geodesics .

这些直线称为短程。

In this paper we turn the problem of sub-Riemannian geodesics into an optimal control problem, express the constraint to, and sub-Riemannian Hamiltonian H=1/2g^(-1)pl(subscript D, pl in detail.

该文从最优控制论的角度，将次黎曼刚地线问题转化为一个最优控制问题，将约束条件γ'∈D转化为，进而得到了次黎曼Hamiltonian H=1/2g^(-1)pl(下标 D， pl的具体形式。

There is also an introduction to some concepts of General Relativity; principle of equivalence; the Schwarzchild metric; gravitational red shift, particle and light trajectories, geodesics, and Shapiro delay.

另外简单介绍广义相对论的一些概念；等效性原则； Schwarzchild史瓦西度规张量，重力红移，粒子与光的轨道，测地线，及 Shapiro 时间延迟。

Firstly, there are two types of winding patterns for toroidal vessel: spiral winding along toroidal vessel geodesics and analogous sine placement along the external surface of toroidal vessel.

首先，环形容器缠绕线型主要有两种类型：沿稳定测地线的螺旋缠绕和类似正弦外包罗铺放。

We consider the rectilinear congruence $T$ generated by the tangents to a one parameter family of geodesics on a space-like surface $S_1$ in the Minkowski $3$-space $E_1^3$, having $S_1$ as one of its focal surfaces.

研究了由三维Minkowski空间$E^3_1$中一个类空曲面$S_1$上一个单参数测地曲线族的切线所构成的直线汇$T$，它以$S_1$为一个焦曲面。

When spiral winding along geodesics finishs one winding cycle, the winding velocity ratio should be adjust to make the locator of fabric not to superpose the origination, and the amount of adjustment of winding velocity ratio should be determined by filling linetype of toroidal vessels big-radius or mid-radius or small-radius.

进行螺旋缠绕时，当完成一个缠绕循环后，为了使落纱点不致于又回到起始位置，应当对缠绕速比进行微调，微调量根据布满环形容器大径或中径或小径而确定。

I bought a nice wrist watch as a surprise for my wife's birthday.

我买了一个漂亮的手表想要给我妻子的生日一个惊喜。

We don t expect students to be sponges. You can t expect to absorb everything and not have any questions to ask.

我们并不期待我们的学生是一块海绵，你没可能接收所有的东西而不提出任何问题。