查询词典 invariance property

SIFT（Scale Invariant Feature Transform） local feature is chosen because of its scale invariance and the property of accurate key-point localization.The Euclidean distance between different SIFT feature vectors is defined as the measure of similarity to get the pre-matched key-point pairs.The affine transform model is used to realize the registration.In order to get the accurate affine transform parameter,the principal of affine transform error is used to get rid of mismatched key-point pairs from the pre-matched pairs.

该方法选取具有良好尺度、旋转不变性以及精确特征点定位能力的SIFT局部特征，使用其特征向量间的欧氏距离作为相似性度量进行特征点匹配，并依据仿射变换误差准则去除奇异匹配特征点对，采用仿射变换的几何模型，实现了遥感图像的快速自动配准。

By using the continuation theorem of coincidence degree theory, homotopy invariance property and Lyapunov's approach, some sufficient conditions ensuring the existence and stability of positive periodic solutions of the system are obtained.

利用Mawhin重合度理论，并结合同伦不变性质，以及Lyapunov方法，获得该系统正周期解的存在性和全局稳定性的充分条件，推广和改进最近一些文献的结果。

The total energy of the system is employed to show the passivity property of TORA, and then a proper Lyapunov function including energy item is designed. Based on Lyapunov theory, a state feedback control algorithm is achieved. The stability of the control system is based on LaSalle invariance theorem.

基于拉格朗日方程，建立了TORA的动力学模型，从能量的角度出发，说明了系统的无源特性，在此基础上设计了一个合适李亚普诺夫函数，从而得到了系统的控制算法；采用拉萨尔不变性原理分析了控制系统的稳定性。

First, the optimal approximating network is presented and the invariance property of the marginal distribution of some variables is studied.

首先解决了在Bayes网络中删除一条弧之后的最优近似网络中的参数赋值问题，并研究了最优近似网络中某些结点子集的边缘分布在近似以后所具有的不变性，给出了边缘分布保持不变的最大结点子集。

This method exhibits shift-invariance property and can effectively improve Pec (Probability of Correct Classification) and training as well as testing speed.

该方法保证了目标的平移不变性，有效地提高了识别率、训练速度和识别速度，降低了对目标方位估计精度的要求。

Based on twenty yearss research, Chen Lin developed the holistic processing hypothesis of Gestalt psychology into topology property perception theory, and thought of the human perception as a processing from holistic property to local property of perceptual object. From the viewpoint of Chen, a primitive and general function of the visual system is the perception of topological properties, and perceptual organization should be understood in the perspective of transformation and perception of invariance over transformation in the topological approach.

基于二十余年的研究积累，陈霖的拓扑性质知觉理论从格式塔心理学的整体加工思想出发，试图结合拓扑学的相关研究，对人类的知觉加工给出一个"大范围到局部"的说明，认为视觉系统的基本单元和一般功能是拓扑性质的知觉，知觉组织应当从变换和变换中的不变性知觉的角度进行理解。

In this paper,a review on the recent studies of the spectra of complex networks has been presented.First,we introduce relations between the spectral density and the structure of the three important network models and the applications in the centrality and bipartivity.Next,we describe the scaling invariance property of the spectral series and ...

本文总结了近年来在网络特征谱方面的研究进展，首先介绍了3类重要网络模型邻接矩阵的特征谱密度和网络结构的关系及其在网络中心性和二分性中的应用，接着介绍了谱序列中存在的标度不变性和结构涌现，然后介绍了网络Laplacian矩阵的特征谱与网络同步之间的关系以及在分析网络社团结构中的应用，最后指出了进一步研究的方向。

The curve, to be calledλ-Bezier curve not only inherits themost properties of n-degree Bezier curve, such as endpoints properties, symmetry,convex hull property, geometric invariability, affine invariance, convex-preservingproperty, variation diminishing property and so on, but also can be adjusted inshape by changing the value ofλwithout changement of control points.

曲线不仅具有n次Bézier曲线的特性：如端点插值、端边相切、凸包性、变差缩减性、保凸性等，而且具有形状的可调性：在控制顶点不变的情况下，随着参数不同，可产生不同逼近控制多边形的曲线。

The dissertation includes:◆General research of canonic VSC The contents are following: the cause and eliminating approach of chattering; Invariance property; the relation between VSC and high-gain linear feedback control.

讨论了产生不变性的条件；揭示了VSC与大增益线性反馈控制的等价关系；提出了用切换面邻域内的稳定性来分析抖动起因的方法。◆研究了不确定系统的VSC设计分别针对满足匹配条件但集总不确定部分上界不确知、不满足匹配条件但满足广义匹配条件、不满足广义匹配条件等情况，研究了其VSC设计问题。

The invariance property of the Krylov subspace is used to solve the large sparse complex symmetric linear system.

其中，利用Krylov子空间不变性求解离散得到的大型稀疏复对称线性方程组。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐