参数估计

In this paper,spiry trajectory method for bearings-only TMA and a location algorithm for 3-D moving emitters based on MGEKF are given.

目标运动分析方法是1980年代提出来的一种被动定位方法，它以估计目标的运动参数为主

The sensitivity analysis results show that ticket price changes have a significant effect on flight load. Analysis of the influence of different flight departure time alteration on flight load may also serve as a reference for the flight departure time adjustment considerations of airlines. Furthermore, the estimation parameter value in passenger choice utility function for passengers to early arrival is less then to late arrivals. This shows that domestic flight passengers prefer the early arrival flight to late arrival flight under the same time difference between passenger desired departure time and flight departure time.

另由敏感度分析之结果，显示票价变动对班次承载之影响明显，而变动班次起飞时间对班次承载影响之分析，亦可作为航空公司调整其班次起飞时间之参考；此外，由旅客选择效用函数中班次时间差之参数，早到与晚到校估值的差异，以及采早到与晚到对旅客吸引时间范围不同时，其估计误差较采早到与晚到时间范围相同下小，此等结果皆显示国内旅客对於早到与晚到的感受不同。

This paper not only educes its calculation expression but also proves that statistic properties of parameters estimated are excellent.

文中详细叙述了其方法步骤，并证明了该算法估计出的参数具有良好的渐近统计性质。

This kind of group embeds means to make the sealed structure parameter that estimates this model becomes a possibility.

这种组嵌方式使得估计该模型的未知结构参数成为可能。

The data processing method of metalized capacitor life expectancy and GLUE method of parameter point estimation of Weibull distribution are introduced in the course of analyzing.

分析过程中介绍了威布尔分布的金属化电容器寿命数据处理方法和威布尔分布参数点估计的GLUE方法。

In this paper,we use a double hierarchical algorithm for estimating motion parameters, and a new motion segmentation method for dynamic mosaicking is proposed for creating mosaics with moving objects,which considers a moving camera.

本文采用多重分层叠代算法来估计全局运动参数，并提出应用于动态拼接的运动分割新方法，实现既有摄像机运动又有物体运动的视频图像序列自动拼接。

The motion dynamics and echo models of the precessing warhead in single frequency are set up. Based on a quantitative analysis on echo spectrum and micro-Doppler modulation of precessing cone, a precession parameter estimation method by echo correlation and spectrum width is proposed. The experiments on data by simulation and darkroom measurement verify the method.

建立了单频信号下雷达观测弹头的进动模型和回波模型，通过对进动弹头回波频谱与微多普勒调制特性的定量分析，提出了利用回波相关方法和频谱展宽估计进动参数的方法，并利用暗室测量数据对该方法的性能进行了实验验证。

Discrete Ambiguity Function is used to estimate parameters of LFM signal after improving SNR based on recomposing sequences.

摘要提出了一种基于序列重组提升输入信噪比，然后利用离散模糊函数估计LFM信号参数的新方法。

In the second research part of this thesis,the problem of speech enhancement is reformulated as both autoregressive parameter estimation and speech signal prediction .

论文的第二部分将语音增强问题归结为自回归参数的估计与语音信号预测联合问题。

A two-times locating method based on the gray contrast of surroundings is presented in locating central reference point. This method has better adaptability and robustness, and can basically meet for the accuracy of automatic locating center. Fourier spectral analysis is improved to obtain a more accurate ridge frequency in computing ridge frequency. The average ridge width is used in designing Gabor filters, so the filters have certain adjustability. The rotating invariance of fingerprint images is solved by the rotating of feature models in feature matching.

在中心参考点定位部分，提出了基于局部邻域灰度对比度的二次定位方法，该方法具有较强的适应性和鲁棒性，基本满足自动中心定位的准确度要求；在频率域估计中，改进了傅立叶谱分析法，提高了纹线频率计算的准确度；引入平均纹线宽度作为Gabor滤波器的设计参数，使滤波器具有一定的自适应性；在特征匹配阶段，通过对特征模板的旋转解决指纹图像的旋转不变性问题。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。