维数

Aerodynamic force,moments,and longitudinal stability derivatives are estimated by three-dimensional low-order panel method.

涉及的气动力、力距和纵向稳定导数等则由三维低阶板块法计算获得。

A one-dimensional ion-cyclotron-resonance driven three-fluid model for the slow solar wind consisting of electrons, protons and alpha particles was constructed with emphasis on the effect of flow tube parameters on the alpha particle abundance.

建立了离子回旋共振机制驱动的一维三元（电子、质子、alpha粒子）低速太阳风流管模型，重点分析流管参数对alpha粒子丰度（定义为alpha粒子与质子数密度之比）的影响。

By means of uniting geometry with algebra, the arc length, tangent line, cotangent space and curvature of curve in four dimensional space are investigated, and the corresponding calculation formula in each cases are given.

用形数结合的观点研究了四维空间中曲线的弧长、切线、法空间和曲率问题，并给出了其计算公式。

Chapter 9: We report a large quantity of numerical experiments of 13 different algebraic multigrid algorithms for solving the Poisson equation, anisotropic equation, equation with cross-derivative terms, general matrix problems with large off-diagonal positive entries, biharmonic equation, Toeplity matrix, elasticity systems, finite element discretization of the Laplacian and even 3D problems. Particular attention is focused on asymptotic convergence factors and CPU-time consumed. Numerical results for many different types of practical problems demonstrate the efficiency and robustness of the proposed algebraic multigrid methods.

第九章：在各种代数多重网格算法的基础上，进行了大量的数值试验，具体给出了十三种不同的代数多重网格方法求解泊松方程，各向异性方程，带混合导数项的方程，带有大的非对角正元素的一般矩阵问题，重调和方程，托普利兹矩阵，弹性力学方程组，拉普拉斯算子的有限元离散，甚至三维问题的较为丰富的数值结果，重点关注它们的渐近收敛因子和所需的CPU时间，来源于不同类型问题的计算结果既为代数多重网格理论分析和算法的改进提供了很实用的资料，同时也证实了本文给出的代数多重网格算法的效绩和稳健性。

Eight dimensions is a rarefied space that is home to the octonions -"the crazy old uncle nobody lets out of the attic", as mathematician John Baez of the University of California, Riverside, puts it.

8维空间，是容纳八元数的稀疏空间——"没有人要这位疯狂的老叔父离开他的阁楼"，正如加州大学河滨分校的数学家约翰·贝茨所说的那样。

He is the son of Sir Charles Baskerville's younger brother,who died some years ago.

他是查尔斯。巴斯克维尔爵士的弟弟的儿子，他弟弟本人已在数年前故去。

Ringel realized positive parts of semisimple Lie algebras in the framework of Ringel-Hall algebras. The main result of this thesis is to build a geometric and topological model over triangulated categories such as derived categories and stable module categories of repetitive algebras. We defines a Lie bracket by Euler characteristics of constructible subsets and thus realizes infinite dimensional Lie algebras of various types with non-degenerated bilinear form.

本文的主要结果是在导出范畴和重复代数的稳定模范畴等三角范畴水平上建立相应的几何-拓扑模型，并利用相应可构集的欧拉示性数定义了一个Hall代数的交换子乘法，从而在三角范畴水平上实现了一大类无限维李代数的整体构造，并且这类李代数本质上都具有非退化的不变双线性型。

Established in 2002, it adopted Italian McQuay water cooling machinery set, Gernab Bitzer compound compressor and Italian ESPRIT digital display temperature controller.

建立于2002年，采用意大利麦克维尔冷水机组、德国比泽尔双级压缩机及意大利小精灵数显温控器。

Can be widely used in two-dimensional, mapping, engineering development, a variety of sophisticated electronics, mold, PCB board, conductive rubber, screws, stamping parts, watches, mobile phone industry.

可广泛应用于二维抄数、绘图、工程开发、各种精密电子、模具、PCB板、导电橡胶、螺丝、冲压件、手表、手机等行业。

After previous unsuccessful election campaigns in the Sverdlovsk region, the 32-year-old hopes to enlist a little magical help from the boy wizard by changing his name to Harry Ivanovich Potter.

经过数次在斯维尔德洛夫斯克地区的竞选中落败后，这名32岁的男子希望通过把名字改为哈里·伊万挪维奇·波特的方式来寻求小魔法师神奇魔力的帮助。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。