查询词典 moment method

Chapter 1 briefs the relation between invariance and computer vision and summarizes the research and application of invariance in computer vision. Chapter 2 first derives the transformations of three camera models, then makes the correpondences between the models and three typical geometrical transformation groups by analysing the transformations respectively. The correspondences supply the theoretical basis for applying geometrical invariants to resolve the problems of computer vision. In Chapter 3, we describe the geometrical invariant theory and prove some geometrical invariants of coplanar points, lines or conics by algebraic method. In order to use the invariants of conic pairs to describe general 2D shapes, we discuss the perspectively invariant representation of planar curves using conies in detail. A system consisted of two TMS320C25 and based on moment invariants is introduced in Chapter 5. The system can recognize more than 30 different shapes of object model or more than 10 plane models with similar shape in real time.

第一章简述了不变性与计算机视觉的关系，以及计算机视觉中的不变性研究和应用概况；第二章推导了计算机视觉中常用三种投影模型的变换关系，通过对这三种变换关系的分析，分别建立了这三种投影模型和几何学中的三种变换群之间的一一对应关系，为几何不变性在计算机视觉中的应用提供了理论基础；在第三章中，我们介绍了几何不变性的理论，并且用代数方法证明了共面点、直线、二次曲线的几何不变量和射影不变量；为了把二次曲线的不变量用于一般二维形状描述，在第四章中我们详细地讨论了用二次曲线实现一般平面曲线的透视不变性表示的方法；第五章介绍了用两片TMS320C25构成的、基于不变矩形特征的运动目标实时识别系统。

Via the stochastic averaging method, the four-dimensional system is reduced to a two-dimensional one. Through the logarithmic polar transformation , and then Girsanov theorem and Feynmann-Kac formula, the backword differential operator is then obtained. By expanding the eigenfunctions as a Fourier cosine series, the approximate analytic expansion of the moment Lyapunov exponent is then obtained.

首先在经典二元机翼颤振方程加入随机激励，通过随机平均法，Girsanov定理和Feynmann-Kac公式得到关于矩Lyapunov指数的特征值问题，其次采用Fourier余弦级数对特征函数进行正交展开得到系统矩Lyapunov指数的近似解析式。

A comparison between the numerical analysis by arc-length method and the test results shows good agreements in ultimate loads and moment- cubature relational curves.

进行了单调加载和反复加载截面的非线性分析，并与试验进行了对比，理论分析和试验结果吻合良好。

Spatial white noise is considered first then the spatial colored noise. Two method based on 1st and 2nd order cyclic moments, CERA, and then 3rd order cyclic moment, MCERA, are proposed separately.

分白噪声及有色噪声两种情况，分别提出了基于一、二阶循环矩的CERA方法和基于三阶循环矩的MCERA方法。

Dichroic, Period Method of Moment, Bandwidth, Resonant Frequency

准光滤波器，周期矩量法，带宽，谐振频率

But different method of discretization of wavelet moment shows different performance.

但不同的小波矩离散化方法在性能上有很大的差异。

According to mechanical analysis of subsea wellhead for deepwater drilling, a comprehensive stability analysis method is established. The marine environmental loading, drilling vessel or platform drifting, riser mechanical behavior, nonlinear behavior between casing string and formations are considered. Case analysis shows, the lateral displacement and bending moment of wellhead increases along with riser top tension ratios and current velocities.

根据深水钻井水下井口系统整体受力分析，建立了井口力学稳定性分析方法，该方法综合考虑了海洋环境载荷、钻井船或平台漂移、隔水管力学性能、套管柱与地层之间的非线性响应等因素的影响，可以实现井口力学性能分析。

In this paper,the method of moment is employed for analyzing the electromagnetic character of wire structure conductor.

0引言矩量法在求解电磁场边界问题的数值计算中已获得了广泛的应用[1-3]。

By using the finite element method and the empiric formula, the deformation of the entire pipe under the actions of the internal pressure and the high temperature and the bending moment on each section are obtained in this paper.

利用有限元方法和经验公式求出了整体锅炉管道在内压和温度作用下的变形及各截面上的弯矩，重点分析了椭圆形截面管上各点的环向应力。

The finite field method is used to calculate difference of dipole moment of theground state and excited state.

然后利用上述结果，用少态模型计算分子的双光子吸收截面。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。