查询词典 estimation of parameter

The investigations included the following:（1） estimation of sea ice distribution by ship-based observations between Middle Weddell Sea and Prydz Bay;（2） estimation of sea ice distribution by aerial photography in the Prydz Bay;（3） direct measurements of fast ice thickness and snow cover, as well as ice core sampling in Nella Fjord;（4） estimation of melting sea ice patterns near the ZhongShan Station; and （5） observation of sea ice early freezing near the ZhongShan Station.

包括：（1）基于走航观测的威德尔海至普利茨湾之间海冰分布研究；（2）基于航空拍摄的普利茨湾海冰分布研究；（3）纳拉海峡固定冰和上浮雪厚度钻孔测量以及冰心钻取；（4）中山站附近融化冰的分布研究以及（5）中山站附近海冰早期冻结过程观测研究。

The algorithm firstly selects effective area,the extent of wet and dry,position offset as estimation factor,considering all estimation factors in order to obtain the total quality point,secondly the ultimate estimation result is obtained based on above,finally isolated block is removed by calculating the area of the remaining fingerprint.

该算法首先选取指纹图像的有效面积、干湿程度、位置偏移量作为评价因子，然后综合考虑各种评价因子求取总的质量分得到最终的评价结果；最后通过计算面积割除孤立的残留指纹。

This paper utilizes FFT after undersampling to analyze the relationship between the estimation of sinusoidal parameters and corresponding actual values on the basis of bandpass sampling theorem. In addition, the errors of parameter estimation using phase difference are deduced strictly.

摘要该文从带通采样定理出发，分析了欠采样后利用FFT估得的正弦信号参数与真实值之间的关系，并对欠采样下基于相位差分法的参数估计的误差进行了严格的推导。

Based on the repetitive characteristic of the transmitted signal, a frequency domain signal model is developed. Its similarity to DOA estimation using an array and its ambiguity in parameter estimation are analyzed.

基于发射信号的周期重复性，建立了接收信号的频域模型，分析了该模型与利用阵列进行来波方向估计模型的相似性，以及该模型在参数估值时的模糊性。

Describes general methods of point and interval parameter estimation and the small and large sample properties of estimators: method of moments, maximum likelihood, unbiased estimation, Rao-Blackwell and Lehmann-Scheffe theorems, information inequality, asymptotic relative efficiency of estimators.

点估计和区间估计的一般方法，估计量的小样本和大样本性质：矩法，极大似然估计，无偏估计，Rao-Blackwell 和 Lehmann-Scheffe 理论，信息不等式，渐进相对有效估计量。

The performance function and constraint equation in calculus of variations were constructed by analyzing input and output equations of the system containing parameters to be estimated. The traditional parameter estimation problem could be transformed to that of least squares estimation.

通过分析包含待估参数的系统输入输出方程，构造变分法中的性能范函和约束方程，将传统的参数估计问题化为带约束条件的最小二乘估计问题；利用拉格朗日乘子法，分析参数估计方程，得到参数的最优估计。

Under some conditions, the consistency of kernel estimation is summarized in theory, and the estimation becomes more stable, the traditional parameter method has no such merit .

从理论上证明了在一定条件下，核估计的相合性。

To solve the problem that the-spectrum estimation performance based on covariation under the-stable noise environmentbecomes obviously worse when the distribution parameter is small,a method of fractional low-order covariance spectrum estimation was proposed.

针对在分布参数值较小时稳定分布噪声下基于共变的谱估计性能较差这一问题，提出了一种分数低阶协方差谱估计方法。

Combined with statistical based Bayesian estimation and adaptive distribution parameter estimation, an effective denoising algorithm is gained.

结合贝叶斯估计技术和自适应分布参数确定方法，给出了有效的图像去噪算法。

Furthermore, the situation of the targets and imaging devices considering noise is studied. The recurrence formula of parameter estimation and the steady variance of estimation error are given.

进一步研究了目标受到干扰及成像设备存在噪声情况下的目标运动参数的估计问题，得到了参数估计的递推公式，并给出了估计误差稳态方差的范围。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。