不变性

Research on calibration of cameras based on cross ratio invariability ;2. Firstly,order radial lens distortion parameters are computed by using cross ratio invariability .

该方法利用透视投影的交比不变性原理标定镜头的畸变系数，基于摄像机成像的单应性矩阵及内部参数的基本约束，线性标定出其他摄像机参数。

Similar to the notion of behavioral subtyping in object-oriented language,a notion of crosscutting invariant is proposed.

类似面向对象语言中的行为子类型概念，引入横切不变性概念。

Accordingly,they can result in the celebrated Jordan theorem and the third decomposition theorem of space directly and, moreover,they can give a new deep insight into the exquisite and subtle structure of the Jordan ...

因而，它们能够直接导致著名的Jordan定理及空间的第三分解定理，且能给出对Jordan形精致微妙结构的新的深刻洞察。后者表明，复线性变换的Jordan标准形是一种在双重任意选择下具有不变性的结构。

Inspired by this section, in section 5.2,we explore some basic topological degree properties of A-proper mapping in Menger pn-space. By its homotopy invariance, we prove the existence of solution for some equations.

受这节内容的启发，在第5.2节，我们首次在Menger pn-空间中研究了A-proper映射的拓扑度理论，并利用其同伦不变性获得了几类方程解的存在性。

Then, the matrix product of them determined the pressure fluctuations＇power spectral density function matrix .

实验还证实了单个气栓内部瞬时压力的均匀性和料栓内部空隙率的不变性。

Using the properties of differential cross section is invariant under the rota- tion of total spin,The ambiguity in assigning phase shift of the nueleon-deu tron scattering is discussed.

从氘核与核子的散射截面在自旋转动下的不变性讨论了由散射截面确定相移的非单值性。

Phase congruency is a dimensionless quantity that is invariant to changes in image brightness or contrast.By the integral projection of the phase congruency image as features and the support vector machines as the classifier,The paper has been robust to various illumination and sharply accelerated via coarse filtration.

相位一致性是一种无量纲的，对图像亮度和对比度变化具有不变性的测度，利用相位一致性图的积分投影进行降维后结合SVM实现了对光照条件鲁棒的检测算法，并通过粗筛选层大幅提高检测速度。

Experiments show that the improve coarseness has higher texture discriminability and better rotation invariance, and that the image retrieval result based on the improved coarseness is superior to that based on the previous coarseness.

实验表明，改进纹理粗糙度具有更强的纹理分辨能力和更好的旋转不变性，基于改进纹理粗糙度的图像检索结果优于基于原有纹理粗糙度的图像检索结果。

The result generalizes the conclusion in the existing articles about the set invariability condition,it can enlarge the domain of attraction.

本文结果是已有文献给出的集合不变性条件的推广，它能用来很好地扩大系统的吸引域

Double Density Dual-Tree Complex Wavelet Transform integrates the advantages of double density wavelet, dual tree wavelet and complex wavelet. It has translation invariability and improved directionality. When it is introduced to image fusion, the characteristics of original images are extracted better and more information for fusion is obtained.

摘要双密度双树复数小波变换综合了双密度小波、双树小波和复数小波的优点，具有平移不变性以及良好的方向性，将其引入图像融合能够更好地提取原始图像的特征，为融合图像提供更多的信息。

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