查询词典 efficient estimator

Secondly, in this study, China's staple food demand is offered to have both long-term and short-term stability, and it fits the "best linear unbiased estimator", goodness of fit , hence it is predictable and has long-term developing co-relation--the rise of food consumption causes the rise of food price and the increase of food consumption stimulate the increase of income.

实证结果发现：中国粮食长、短期发展具稳定性、最小变异线性不偏估计式(best linear unbiased estimator，BLUE)、有配适性且残差变异数齐一，亦无自我相关性、故具可预测性与长远发展关系，乃粮食消费增加，刺激粮食售价的攀升；粮食消费量增加，刺激所得增加。

1 The reasons there are two main expressions for "population" and "sample"" is that one is "biased estimator and the other is not.

"母体"与"样本"之所以有两种表达公式，是因为一个是有偏估计，另一个则不是。

Uncertain POMDP with infinite planning horizon is also discussed, and the biased maximum estimator is used to acquire an optimal control method.

本文主要的创新有：首次提出并研究了有限规划水平MDP的自适应决策，通过将Bayes方法引入MDP的自适应决策，获得能够实现次优的自适应决策方法，从而为在生产实践中大量存在的有限规划水平MDP自适应决策提供了理论指导。

Instead of using the homomorphic filter which is used to get rid of multiple noise and is a biased estimator, this algorithm translates speckle into locally stationary additive white noise.

该算法不同于有偏的去除乘性噪声的同态滤波算法，而是将噪声转化为局部平稳的加性白噪声。

The reason lies that detrending towards the data process is problematic because of biased OLS estimator, and RWB isn't suitable to the TAR model because it is constructed based on linear autoregressive model.

原因在于①对数据过程进行退势是有问题的，因为均值估计是有偏估计；②RWB方法是基于AR模型而提出的，不适用于TAR模型。

The performance of EFT is investigated, which indicates that time-frequency distributions using single-sided window could not accurately trace the variation of the instantaneous frequency, since their performance depend only on the history of the signal, so they are biased frequency estimator.

提出了基于对称阵元互Wigner分布平均的瞬时频率估计算法，这种方法利用多通道数据对时频分布的瞬时频率估计方法的性能进行了有效的改善，并且能够在低信噪比的条件下获得良好的估计效果， 6。

Part 2 studies the adaptive control of general MDP with the same parameter set as part 1. In part 3, the biased maximum likelihood estimator is used for the adaptive control uncertain POMDP and an optimal method is proposed.

第一部分在离散化参数集的基础上提出一种比现有方法效率更高的自适应决策方法；第二部分在第一部分的思想上，研究一般MDP的自适应决策；第三部分则将有偏极大似然法从MDP推广到POMDP，研究POMDP自适应决策。

In addition, considering the possible weak instruments problem in the first difference GMM estimator developed by Arellano and Bond (1991), the system GMM developed by Blundell and Bond (1998) should be a more suitable way to observe the relation between initial income level and economic growth convergence.

此外，考虑采用Arellano and Bond(1991)的the first difference GMM估计式可能存在弱工具性问题，以Blundell and Bond(1998)发展出的the system GMM估计式，作为探讨初始所得与经济成长收敛的关系应是较为适合的方法。

Based on the special pilot pattern, the frequency offset estimation is obtained by the correlation of the pilot symbols; the Cramer-Rao Low Bounder of the frequency offset estimator is given for different channels.

在该导频序列的基础上，利用导频符号之间的相关性推导出频偏估计器，得到了该估计器在不同信道下的Cramer-Rao下界。

In the chapter 3, first introduces estimator of functional coefficient autoregressive model and local linear estimation method and its asymptotic normality forα-mixing samples is given and improved selected method of parameters, then studies application of FAR model in stock market, finally compared goodness of fit between AR and FAR models by generalized likelihood ratio method, and then forecast result.

其中，我们对模型参数的选择方法略作改进，使之更具可操作性，然后用函数系数自回归模型对上海股市日收益率进行实证研究，并利用广义似然比检验对函数系数模型和线性模型进行有效性检验及预测结果比较。

It's bell can reach over a meter in diameter.

它的身体最大可以达到直径1米多。

Now they are overdue and I shall have to pay a fine.

现在他们过期了，我不得不付罚款。