查询词典 efficient estimator

The maximum likelihood estimator approach is an important one in frequency estimation domain. This approach has the merit such as exhibiting best performance and requiring minimum threshold of signal noise ratio in calculation.

最大似然频率估计法是该领域中的一种重要的研究方法；该方法具有估计结果准确，计算所要求的信噪比门限值低等特点。

Our new model can avoid the contingent of unboundedness of the maximum likelihood function and excessive sensitivity of the maximum likelihood estimator to outliers, showing more robustness.

新模型可以克服似然函数可能出现无界的现象，在计算上有更好的鲁棒性。

In reliability testing, weibull distribution is widely used to analyze the lifetime of electronic products. Weibull Probability Plot and Maximum Likelihood Estimator were often applied to estimate the weibull parameters.

在可靠度试验中，韦伯分配为最常用的产品寿命分配，韦伯机率纸和最大概似估计法是韦伯分配常用的两种参数估计方法。

To begin with this thesis, using Contourlet transform as an example, it conducts the estimation of marginal and joint statistical distribution of Contourlet coefficients via moment method and maximum likelihood estimator.

本文以Contourlet变换作为切入点，证明了Contourlet变换是一种稀疏表示方式，测试图像在Contourlet变换域的边缘分布属于高度非高斯分布。

Using the characteristic found,the maximum likelihood estimators and the moment estimator s of parameters of the multivariate exponential distribution of Freund are obtained.

利用分布密度分拆的思想，导出了二元及多元Freund型指数分布的一个特征，利用该特征，获得了二元及多元Freund型指数分布参数的最大似然估计及矩估计，还给出了强度服从二元Fre-und型指数分布时并联结构系统的可靠度估计及模拟。

Analysis implies that when a different weighting matrix is used in the R-WSF method, the criterion function of the R-WSF method is asymptotically equivalent to that of the determinate maximum likelihood estimator and the classical WSF method, respectively.

理论分析表明，当加权矩阵取不同的值时，R-WSF方法的代价函数可以分别渐近地等效于确定性最大似然法和常规WSF方法的代价函数。

An improved maximum likelihood estimator as the generalized correlation method for timedelay estimation, which adopted the methods of windowing and least mean square filter, was proposed.

改进的算法采用加窗法和最小均方差（LMS滤波法，弥补了原算法计算量大及无法消除回响干扰的不足。

Three aspects of work are considered: The first aspect: we considered the error bound of the maximum likelihood estimation estimator for a class of nonstationary diffusion processes with parameters in both drift and diffusion parts.

论文的主要内容由以下三个部分组成：第一部分：我们考虑一类非平稳扩散过程参数极大似然估计的误差界。

In this case, the received carrier is modulated by unknown Doppler frequency and frequency rate. The estimation techniques as maximum likelihood estimator and extended Kalman filter are described and compared in our dissertation by tracking a common simulated highdynamic trajectory.

文中详细推导了任意信噪比情况下，时延和多普勒频率估计的方差下限表达式：在信噪比高于门限信噪比的情况下，具体推导了估计方差的Cramer-Rao限；在信噪比低于门限信噪比时，估计的方差下限还与失锁概率有关。

Using the estimation of marginal and joint statistical distribution of Contourlet coefficients via the method of maximum likelihood estimator, multiplicative watermarking and blind detection framework is presented in the Wavelet transformation domain and the Contourlet transformation domain.

采用极大似然估计的方法对Wavelet变换和Contourlet变换系数的边缘分布和联合分布进行拟合，提出了一种Wavelet变换域和Contourlet变换域乘嵌入水印及盲检测框架。

I was just taking her hand, to help her out of a car, and I knew it.

我只是握着她的手，扶她下车，但我知道这一切。

China and South Korea have excoriated Japan over its approval of new school books which they say whitewash the atrocities committed during Japanese occupation, and anti-Japanese protests have been held in Chinese cities. The lingering bitterness over Japan's past imperialism still threatens to mar relations between the big East Asian powers

中国和韩国强烈谴责日本通过新的中学历史教科书，他们认为这一教科书掩盖了日本在其占领期间所犯下的残酷暴行，反日抗议活动在中国数座城市发生，历史上日本帝国主义制造的痛楚无法被忘却，这有可能破坏东亚强国间的关系。