查询词典 sequential estimation

A three-sided measurement method,a weighted least squares estimation method and a robust least squares estimation method are used to make wireless sensor network node localization more accurate.

为提高无线传感器网络节点定位精度，提出3种基于距离信息的改进定位算法：改进三边测量法、加权最小二乘估计、抗差最小二乘估计。

First,owing to the wide range of use of WeibuU distribution,we propose the Weibull MTD model,which has improved the MTD model based on Gaussian distribution in some thick-tailed cases;Second,some stationarity properties of the model are discussed;After that,we apply the standard EM algorithm to mixture models to get the estimation equations and then expose bootstrap method to calculate confidence region of the parameters;Finally,some simulations and an example are analyzed in detail,which show that when analyzing nonstandard date,such as financial date,insurance date and so on,it is more proper for estimation to use the Weibull MTD model than the Gaussian MTD model.

首先给出基于Weibull分布的混合转移分布模型的一阶与k阶平稳的充分必要条件；接着，应用EM算法，得到了参数的极大似然估计及它们的标准误差；然后，应用Bootstrap方法，得到了参数的置信区间；最后，通过模拟与实例分析，说明该模型在分析来自金融、保险等某些厚尾分布的数据时，在参数估计方面的表现优于高斯混合转移分布模型。

Portfolio features the individual estimation, presentation and introspection as well as organizational development and achievement. For the purpose of the portfolio record, individuals are able to take it as the reference resources for future self-education by doing the self-estimation and self-examination. It could be applied to the an enterprise as a standard for human resource department to evaluate the recruitment, performance and promotion. Therefore, the portability and compatibility of Portfolio are very important nowadays.

中文摘要学习历程档具有评估、展示及反思个人或团队学习发展及成就累积的特性，藉由学习历程记录，可以由学习者自我评估、反思学习活动的广度与深度，以做为日后持续进修的参考，企业并可做为员工个人之任用、考绩与升迁的参考依据，因此学习历程的可携性及互通性格外引起重视。

In order to enhance the location estimation performance of mobile station tracking and positioning, a new method of mobile location optimal estimation based on the federated filtering structure and the simplified unscented Kalman filter is presented.

为了进一步提高移动台的跟踪和定位性能，提出了一种基于联邦滤波结构和简化UKF的移动位置最优估计与融合新方法。

This papers studies the popular software size estimation methods, such as the academic basis and estimation steps of Delphi, analogy method and PERT.

本文对目前流行的几种常用的软件规模估算方法进行了研究和对比。

In chapter 3, based on the analysis of tradional methods, the methods of time delay estimation and phase estimation via HOS is presented.

第三章在分析传统方法的基础上，将高阶统计量引入到延时和相位估算中，提出了基于HOS的延时估算方法和检相方法，获得了较好的延时和相位估计效果。

The linear reconstruction approach using Green-Gauss gradient estimation is applied in order to obtain second order spatial accuracy. A new gradient estimation based on the weighted average of Barth and Jespersen's three point model limiter is employed to minimize the numerical oscillations around solution discontinuities.

利用格林－高斯公式对控制体内的变量进行线性重构，获得空间二阶精度，并采用Barth型限制器以抑制数值解的振荡。

In this thesis, the basic arithmetic of PIV software - cross-correlation arithmetic is introduced in detail, During the data process, through processing the two sequential images by the cross-correlation arithmetic, the vector charts of particles velocity can be obtained, so is the chart of absolute velocity, with velocity decomposed into the radial velocity and axial velocity.

本文对试验所获得的连续图像通过互相关算法，获得颗粒速度矢量图，并将速度分解为径向速度和轴向速度，对每一小区域内的颗粒按速度方向不同进行速度平均，获得颗粒的平均速度分布曲线。

Based on the sliding response theory of the free-standing equipment, the differential equation of motion of the free-standing equipment under seismic excitations is presented. The equation is solved by Runge-Kutta algorithm, therefore the absolute acceleration, relative velocity and relative displacement of the equipment can be obtained. The sequential coulomb friction model is applied to the analysis.

以前人研究建立的浮放设备滑移反应分析理论为基础，给出了浮放设备在水平和竖向地震输入下滑移反应运动微分方程，选取连续型的库仑摩擦力模型，采用Runge-Kutta法求解浮放设备地震滑移反应运动微分方程，可以得到浮放设备在地震作用下的绝对加速度、相对速度和相对位移反应时程。

A detection method of the inima and adventitia edges of sequential IVUS simulated images is proposed by means of their statistical features.

它基于活动轮廓模型、IVUS图像的对比度特征和瑞利统计分布特性，通过采用动态规划和启发式图搜索的方法，对图像边缘进行了最优化的提取。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。