查询词典 simultaneous invariant

Experiments show that the algorithm can extract the affine-invariant line skeleton, resist the noise and automatically determine the branch point and key point in the skeleton.

该算法能够从散乱点集上得到一维"线"性的骨架，具有仿射不变性，能够抵抗一定的噪声，自动确定骨架上的关节点和分支点。

More precisely, under the assumptions of Dissipation, Competition and Strong Competition, we prove that there is a canonically defined countable family of unordered, disjoint invariant sets which attract all persistent trajectories whose ω-limit sets are not cycles.

的Poincaré映射，证明了在耗散性、竞争性和内部强竞争性的条件下，存在一簇至多可数个互不相交的（n-1）维不变子集吸引所有不渐近于周期轨的持续轨道。

Based on the properties of the saturation function, it was proved that the stability region of such dynamical systems can be decomposed into Cartesian product of an invariant set of their adjoint systems and a sufficiently large ball.

结合饱和函数的特殊性质，证明了此类系统的稳定域可分解为伴随系统的不变集与一个足够大球体的笛卡尔积。

A novel illumination-invariant change detection method of shading model based on Cauchy distribution for visual surveillance systems is proposed.

提出了一种用于视觉监视系统的基于柯西分布的发光模型的光照不变变化检测方法。

A novel illumination-invariant change detection algorithm based on Cauchy distribution is proposed.

为了更好地进行视觉监视，该文给出了一种新的基于柯西分布的光照不变的统计变化检测算法。

In chapter I, we introduce the Jordan-Wigner transformation in detail, and illustrate its applications with three examples: the one-dimensional S = 1 XXZ model; the bilinear-biquadratic SU(2) invariant S = 1 chain; and the ionic Hubbard chain in the strong coupling limit. In chapter II, we review the S = 1/2 transverse Ising chain in detail.

在变换后发现隐藏在自旋为1的系统里自旋为1/2的SU(2)对称性及广义的U(1)规范对称性；(3)通过将推广的强耦合极限下的一维离子型Hubbard 模型变换为SU(3)反铁磁Heisenberg 模型，严格论证了离子型Hubbard 模型从能带绝缘体到莫特绝缘体的转变区域中自发二聚化绝缘体铁电性相即键序波相的存在。

The paper deals with curvature line and curvature characteristic of developable surface based on differential invariant of developable surface and it details curvature line and curvature characteristic of cone and tangent surface .

本文通过可展曲面的微分不变量，导出可展面的曲率线与曲率特征，并以锥面和切线曲面为例阐明这些特性的几何意义。

Since cross ratio is an invariant of the group of all Mbius transformations,and a Mbius transformation maps a circle into another circle, it is convenient to represent a segment of circular arc with a parametric complex rational function.

利用Mbius变换的保交比性质和保圆性质，给出了一种快速、简便地生成平面上的一段精确圆弧曲线的新方法。

In Chapter 4,we focus on the structure of the rational invariant fields of the maximal subgroups and root subgroups of finite classical groups.

第四章在有限典型群的极大子群和根子群的有理不变式域方面做了一些讨论。

By transforming the nonlinear saturation constraint into the special linear constraint, the problem of solving the feedback controller with saturated actuator is converted to the design of controller with linear constraint. The stochastic stability is ensured by using the intersection of ellipsoid invariant set of different modes existing in the attraction domain of the closed loop system. In this case, solving controllers can be equivalent to a solvability problem of linear matrix inequalities.

通过将非线性饱和约束转化为特殊的线性约束，使具有饱和执行器的控制器求解问题转化为线性约束控制器的求解问题，利用位于闭环系统吸引域内的不同模态下椭圆不变集的交集来保证系统的随机稳定性，此时控制器的求解可等效为线性矩阵不等式的可解性问题。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。