查询词典 moments method

Aerodynamic force,moments,and longitudinal stability derivatives are estimated by three-dimensional low-order panel method.

涉及的气动力、力距和纵向稳定导数等则由三维低阶板块法计算获得。

The method of moments in conjunction with the asymptotic waveform evaluation technique is applied to predict the mono-static RCS of an arbitrarily shaped two-dimensional cylinder in both frequency and angular domains.

本文采用矩量法并结合渐近波形估计技术在频域和角度上预测了任意形状二维柱体的单站RCS。

Describes general methods of point and interval parameter estimation and the small and large sample properties of estimators: method of moments, maximum likelihood, unbiased estimation, Rao-Blackwell and Lehmann-Scheffe theorems, information inequality, asymptotic relative efficiency of estimators.

点估计和区间估计的一般方法，估计量的小样本和大样本性质：矩法，极大似然估计，无偏估计，Rao-Blackwell 和 Lehmann-Scheffe 理论，信息不等式，渐进相对有效估计量。

A method of moment features testing components' states is put forward to solve this problem.First the components' barycentric coordinates and second-order centered moments are calculated.Then the inclined angles are obtained,on the basis of which the inclined components can be rectified.

针对这一问题，提出了一种矩特征检测构件状态的方法，该方法首先计算出图像中构件的质心坐标和二阶中心矩，然后求出构件的倾斜角度，根据倾斜角对处于倾斜状态的构件进行校正。

Based on seismic source spectrum solution by multi-station and multi-event coda method, applying Brune seismic source model, we have got the source factors and spectra of 48 small earthquakes occurred before and after the Douhe earthquake of October 6 in 1995. The seismic moments, corner frequencies and stress drops are estimated from the spectra, and their correlation and variation with time before and after the Douhe earthquake are discussed.

在震源谱的多台多震尾波解法的基础上，应用Brune震源模型，求解1995年10月6日陡河ML5.9地震前后在其周围发生的48次小地震的震源因子和震源波谱，进而估算了地震矩、拐角频率和应力降，并讨论了它们之间的相互关系和在陡河地震前后随时间的变化。

The modified double weight function method is to introduce new weight functions doing subtraction between two negative exponential-type functions. For a Pearson type three probability distribution, the MDWF is able to make estimations of the Standard Deviation and Coefficient of Skewness C(subscript S from the second-order weighted central moments reduced to the first-order weighted central moment estimations.

修改的双权函数法是将两个负指数型函数之差所构成的函数类取作权函数，对于皮尔逊Ⅲ型分布，它能使σ和Cs的估计由原权函数法的二阶加权中心矩降低为一阶加权中心矩估计。

Compared with the existing vision-based method for vibration measurement,this method obtains the analytical results of the amplitude of high-frequency vibration by calculating the first and second order geometric moments of a motion blurred image and an unblurred reference image.

与现有的基于计算机视觉的振动测量方法相比，该方法仅通过计算1幅清晰参考图像及1幅运动模糊图像的前2阶几何矩即可得到2D高频直线振动振幅的解析解，降低了根据图像信息测量振幅的计算复杂程度。

Compared with the existing vision-based method for vibration measurement, this method obtains the analytical results of the amplitude of high-frequency vibration by calculating the first and second order geometric moments of a motion blurred image and an unblurred reference image. This reduces the computational complexity for vibration measurement from images.

与现有的基于计算机视觉的振动测量方法相比，该方法仅通过计算1幅清晰参考图像及1幅运动模糊图像的前2阶几何矩即可得到2D高频直线振动振幅的解析解，降低了根据图像信息测量振幅的计算复杂程度。

Lastly, anti-jamming method based on jittering orthogonal codes at different moments is studied, orthogonal codes are searched with the genetic algorithm, and random initial phase is also used in this method, so great anti-jamming performance is gotten, and the performance is testified through the simulation.

提出了基于正交编码捷变的抗干扰方法，使用遗传算法搜索正交编码集，在不同的慢时刻使用相互正交的编码信号，并与随机初相方法相结合，有效地抑制了基于转发的有源干扰。

In this paper,on the basis of representing images with blocks,we present two algorithms,cumulative method and integral method,for fast and effective computation of the two-dimensional Legendre moments.

这两种方法都有效地降低了计算复杂度，缩短了计算时间。1 引言自从Hu[1] 提出矩的不变量以来，矩在模式识别、图像分析等许多领域都有广泛的应用。

But in the course of internationalization, they meet with misunderstanding and puzzlement.

许多企业已经意识到了这一点，但在国际化的进程中，仍存在一些误区与困惑。

Inorder toaccomplish this goal as quickly as possible, we'll beteamingup with anexperienced group of modelers, skinners, and animatorswhosenames willbe announced in the coming weeks.

为了尽快实现这个目标，我们在未来数周内将公布与一些有经验的模型、皮肤、动画制作小组合作。