查询词典 symmetric

By setting symmetric orbit traps (in particular, by using more complex bounded sets, such as chaotic attractors, as orbit traps), visually fascinating images with cyclic or dihedral symmetry can be created in this way.

通过设置具有对称性的轨迹井(同时也把轨迹井推广到更加复杂的有界集上，如混沌吸引子)，生成具有循环群对称性的彩色图像。

The cyclic symmetric conditions of node points are presented to modify the stiffness and mass matrices of the substructure.With the use of the structural cyclic symmetry and the complex constraint conditions,the eigenvalue ...

这证明复约束法既极大地减少了计算所需内存和机时，又可建立包含轮齿和轮体在内的计算模型，保证了齿轮结构特征值问题计算的完整性和准确性。

This program is employed in the computation of magnetic fields in 2D cylindrically symmetric systems.

该程序在磁场计算中只能假设软磁材料中的磁导率都是已知的固定值。

The method may be applied to cylindrically or spherically symmetric and optically thin ...

可以把这种方法应用到在等离子体物理和天体物理中经常遇到的柱对称或球对称的光学薄的等离子体上。

It is important to study the antenna that can directly radiate cylindrically symmetric modes, which are generated by many high power microwave sources.

许多高功率微波源产生的微波模式都是圆波导轴对称模，因此研究轴对称模式的天线辐射技术具有重要意义。

Two kinds of antenna, Vlasov antenna and COBRA, which are suitable for radiating cylindrically symmetric modes, are investigated through theoretic analyses, numerical calculations and experiments.

本文从理论推导、数值计算和实验等方面研究了两类可以直接辐射轴对称模式的天线—Vlasov天线和COBRA天线。

In this paper, AZIMUTH, which designed for the evaluation of eigenfrequencies and eigenvectors in cylindrically symmetric cavities of essentially arbitrary shapes, is used to calculate the numerical value of the filed distribution.

本文中，采用俄罗斯圆柱形谐振腔软件AZIMUTH，计算出速调管间隙场的数值分布。

For tomotherapy, the QA program included a series of measurements that were recorded in a specially fabricated, cylindrically symmetric Virtual Water phantom.

在多模式螺旋断层放射治疗仪方面，其品质保证计画的实施使用一特别设计制作的匀称圆柱型实体模拟水假体，来作一系列的实际记录量测。

To study the taxiing-induced dynamic response of the aircraft with multiple wheels and multiple landing gears due to runway unevenness, base on several reasonable and necessary assumptions, the mathematical model of aircraft in taxiing is established using the d'alembert's principle. It can simulate taxiing inpact properties accurately, it considers in detail the vertical and horizontal motion and pitching about its center of gravity and the significant symmetric elastic modes.

在一些必要合理的假设下，利用达朗贝尔原理，建立了多轮多支柱式及小车式起落架飞机地面滑跑动态响应分析的全机模型，考虑全机沉浮、机体弹性和定常气动力的影响，起落架支柱的弹性变形，小车式起落架的车架的俯仰运动以及弹性变形，对等速滑跑飞机建立了全机运动的微分方程，并以旧金山28-R跑道为地面输入，利用时域积分的方法得到飞机滑跑的各种响应。

At many occasions they arise quite natu-rally.For example,they appear in the Iwasawa decomposition of the isometry group ofa non-compact Riemannian symmetric space.Also,every connected homogeneous Rie-mannian manifold of non-positive sectional curvature can be represented as a connectedsolvable Lie group with a left-invariant Riemannian metric.

它们出现在非紧致黎曼对称空间的等距群的Iwasawa分解中；任一非正截面曲率的连通齐性和黎曼流形可以表为带有左不变黎曼度量的连通可解李群等，带有左不变黎曼度量的幂零及可解李群的微分几何，调和分析和谱几何是重要的研究课题。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。