查询词典 likelihood method

One point method, mean square curve method and the maximum likelihood principle to predict P-S-N curve for welded steel structures for arbitary survival rate are presented.

本文建立了任意存活率下焊接钢结构P-S-N曲线预测的一点法，均方差曲线法极大似然法。

We focus on a special case of blind identification and signal separation—separation of a Gaussian AR process and a white Gaussian noise. After summarizing and analyzing its maximum likelihood solution in frequency domain, we develop a new ML method based on prediction error method.

四、针对一类特殊的信号分离问题——高斯AR过程与高斯白噪声的盲分离与参数估计，系统地分析和归纳了该类问题的最大似然解决方法，在此基础上基于预测误差方法，给出了一种新的最大似然解决方法。

Upper control limit for exposure point concentration of formaldehyde was calculated by Land method based on maximum likelihood estimates and Chebyshev method based on minimum variance unbiased estimates, and UCL values were 35.18 mg/kg and 41.82 mg/kg, respectively.

采用最大概似估计的Land方法及最小方差无偏估计的Chebyshev方法计算得到甲醛暴露点浓度控制上限，分别为35.18、41.82 mg/kg。

For the detection of epistatic effects, penalized likelihood method and the variable-interval approach of the BSE method are available.

应当指出，压缩估计方法在今后的eQTL和QTN定位以及基因互作网络分析等研究中也是有应用价值的。

Results In static phantom studies, the percent error of mean activity obtained by Carson's method was reduced to about 9 %, and it is less than that of image-derived method using maximum likelihood expectation maximization (about 14 %). In simulated dynamic phantom studies, the vessel component could be extracted using ICA in image and sinogram domain. In sinogram domain, the six components extracted by ICA could be obtained quickly.

在静态物理假体实验结果来看，使用Carson's method计算出感兴趣区域活性的百分比误差( 9%)比直接从影像取得活性的百分比误差( 14%)来得小；从数位模拟动态假体实验结果来看，独立成份分析法运用在影像空间或是弦波图空间上，都可以将血管分离出来，但从弦波图空间上得到各个独立成份相对於影像空间就快得多；imageICA和sinogramICA计算出的输入函数的标准化均方根误差分别是0.57和0.28。

The curve of diameter distribution was showed J shape in Swietenia macrophylla pure stand and Dimocarpus longan pure stand. We used maximum likelihood method and percentile estimator method to analysis stand structure.

纯林之直径分布中，桃花心木林与龙眼林林分其直径分布呈现倒J型分布；柚木、摩鹿加合欢、相思树林、苦楝林型其直径分布呈现复合型分布；黑板树林型及白鸡油林型为左偏态分布。

The method is based on a spatial combination mask of the Spectrum-photometric Method(TM2+TM3-(TM4+TM5) index and the Tasseled Cap Wetness index,and removing other objects from the mask image by using maximum likelihood classifier.

方法利用谱间关系(TM2+TM3-(TM4+TM5)和缨帽变换湿度分量TCW建立提取水体的最优空间掩膜，使用最大似然法去除最优空间掩膜中其他的地物信息。

On the approximate uncorrelation property of DWT coefficients of LMSV process in the same scale and different scales, first the quasi maximum likelihood estimation method of parameters and the estimation method of volatility process of LMSV model are presented.

根据小波变换可将过程分解到不同的尺度上以及LMSV过程同一尺度下和不同尺度下DWT系数的近似不相关性，提出了建立局部似然函数的方法，又根据DWT系数和MODWT系数之间的关系，将局部似然函数表示为模型参数和局部小波方差估计的形式，并用该方法对中国股市收益进行了时变LMSV模型参数的估计。

In the light of the complex, high-level and non-linear feature of the mathematical model which describe the transport of the coalbed methane, this paper study the fully-implicit solving method of the mathematical model in detail. Based on the complexity of the algebraic equations which are formed eventually, according to the alternating direction implicit difference pattern, this paper use the iterative method and the fully main element Gauss-Jordan eliminating method to solve equations, which is to use the iterative method to determine coefficient matrix and use the fully main element Gauss-Jordan method to solve th linear algebraic equation group, at the same time of studying the solving method of the mathematical model, according to the devising requirement of FORTRAN77 program structure, this paper draw up computer program and form the corresponding computer model, and verify the validity and reliability of the model in theory by operating the model.

重点研究了模型内、外边界及有关参数的处理，针对描述煤层甲烷运移的数学模型是一个复杂、高阶非线性数学模型的特点，详细研究了模型的全隐式求解方法，根据最后形成的代数方程组的复杂性，按交替方向隐式差分格式，采用迭代与全选主元高斯约当消去法相结合的方法求解方程：即确定系数矩阵采用迭代法，求解线性方程组时采用全选主元高斯约当消去法，在研究模型解法的同时按FORTRAN结构化程序设计的要求，编制计算机程序，形成相应的CBMRS计算机模型，并通过模型的运行从理论上证明了模型的正确性与可靠性。

The description methods of natural scenery was studied based on fractal, that is, recursive method, L-system method, IFS and IFS description method was put forward based on sine or cosine. This method overcomes angularity and consistency of recursive method, L-system method and IFS, and the variety of fractal sculpting consequence can be added and the basis for the later research and the application was provided.

对基于分形的描述自然景物方法，即递归洪、L-系统法、IFS法进行了分析研究，在此基础上，提出基于正余弦的IFS描述法，该方法克服了递归法、L-系统法、IFS法等描述方法的生硬性和一律性，增加了分形造型结果的多样性，为以后的深入研究和应用提供了依据。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。