参数估计

And in the third chapter, we give the estimation of variance of the estimation value of each parameter by using the Delta method and show that the asymptotic property that the estimation value tend to the real value as X tends to be infinite.

在第三章中，我们利用δ-法给出了各参数估计量的方差，证明了当λ趋向无穷大时，估计值趋近于真值的渐近性质。

One method is to change the problems of estimating complex two-dimension sinusoids into the problems of estimating characteristic polynomial coefficients.

一种方法是将复杂的二维正弦波参数估计问题巧妙地转换成一个特征多项式系数估计问题。

Purpose To compare restricted estimation maximum likelihood to markov chain monto carlo for genetic variance component model of quantitative trait in nuclear family.

目的 比较限制性最大似然估计和马尔可夫链蒙特卡罗方法在数量性状遗传方差分量模型中参数估计的偏差和精度。

Weapply the kernel methods of regression functions and conditional density functions to obtain aseries ofβas the estimators ofβ.

回归函数核估计方法中，又分别提出了在选定连续样本点和离散样本点时的两种非参数估计模型，并对这两种模型做了详细的阐述。

Bayesian and empirical Bayesian theory are used to estimate the scale parameter of the double exponential distribution and the loss function and risk function of the Weibull distribution.

中文摘要：本文将贝叶斯，经验贝叶斯理论应用于双指数分布族的刻度参数估计和Weibull分布的损失函数和风险函数的估计。

Therefore, from scientific methodology point of view , the dynamic optimization,relied on state and parameter estimation, is discussed.

因而从科学方法的观点提出了基于状态估计和参数估计的动态优化方法。

Then an adaptive, efficient unbiased estimator of Hurst index based on multiresolution wavelet analysis and weighted regression is presented.

针对基于小波的Hurst指数估计方法的自适应问题，结合方差分析给出了一种有效的解决方法，从而提出了自适应的参数估计方法，并且该方法在一般意义上是无偏的。

Then, based on experience, statistics, statistical and mathematical methods to estimate parameters, re-use of parameter estimates to validate the model based on economic theory is correct, the last use of the revised parameter values to predict the future and planning policy.

然后，根据经验统计资料，用统计和数学方法估算参数，再利用参数估计值来验证模型所依据的经济理论是否正确，最后利用修订的参数值来预测未来和规划政策。

A frame image of a video frequency sequence is read into a postpositional memory zone, and staring position and size information of a tracked object is obtained in the frame, then distribution statistical information of a target signature is extracted to build a gauss mixed model as an object template, a mean vector and a covariance matrix in gauss mixed distribution are used to describe the position and the size of the object, then the next frame image of the video frequency sequence is read into the postpositional memory zone. In a new frame video frequency image, a parameter estimation method is used to obtain object gauss mized model parameters in the current frame in iterative computation and find candidate template similar to the object template, and the final model parameters obtained in iteration are used to update the tracking window for realizing self-adaption of the tracked window.

将视频序列的一帧图像读入缓存区，获得该帧中被跟踪目标的初始位置和尺寸信息，然后提取目标特征的分布统计信息建立高斯混合模型作为目标模板，用高斯混合分布的均值向量和协方差矩阵描述目标的位置和尺寸，再将视频序列下一帧图像读入缓存区，在新一帧视频图像中利用参数估计方法迭代计算当前帧中目标高斯混合模型参数找到与目标模板最相似的候选模板，利用迭代得到的最终模型参数更新跟踪窗口实现跟踪窗宽的自适应。

Then, based on the idea of set-membership identification, we propose a recursive estimation for extended parameters which include the parameters of nominal model and the bound of unmodelled dynamics and disturbances.

然后利用集员辨识的思想，将名义模型的参数和未建模动态及干扰的大小作为未知参数，提出了一种递推参数估计方法。

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。