查询词典 quadratic mean

The suspended sediment exponent model and quadratic inversion model solving spectrum reflectance, spectrum reflectance mean value and reflectance first-order derivative are established respectively, based on the analysis of spectrum characteristics. The results showed that the 900 nm wavelength exponent model can accurately quantitatively inverse the suspended sediment concentrations.

在对其光谱特性进行分析的基础上，分别建立了悬浮泥沙光谱反射率、光谱反射率均值和反射率一阶微分的指数反演模型和二次反演模型，结果显示 900 nm 波长的指数模型可以较准确地定量反演出悬浮泥沙浓度。

V It is proved that, under quadratic loss, the admissibility of a common estimator of mean vector with respect to multivariate t-error model is related to its dimention.

v证明了多元t-分布均值向量的一个常用估计在二次损失下的可容许性与维数有关。

In Chapter 1, we introduce some theories and methods about the estimation of regression coefficient and do some preparations including some theories in the mean vector, the covariance matrix, the quadratic form of random vector, matrix derivative.

第1章概括介绍线性回归模型回归系数估计的一些理论和方法，并给出均值向量与协方差阵、随机向量的二次型、矩阵微商等预备知识。

Results and velocity component are obtained by quadratic polynomial based on time mean of relative sound pressure.

基于相对声压的时间平均的二次多项式得到了测定结果和振速分量。

There was a significant quadratic correlation between the mean soil respiration and cutting intensity.

林地有机质含量是土壤呼吸速率年平均值变化的主要影响因素，其对林地土壤呼吸速率的影响也将是一个长期的过程。

There was a significant quadratic correlation between the mean soil respiration of litter layer and cutting intensity.

枯枝落叶层呼吸速率均值与采伐强度间存在显著的相关关系。

Using this model system, development of quadratic mean diameter, mean height, the number of surviving trees per hectare, stand basal area, and stand volume can be simulated for various levels of initial density and site.

采用该模型系统即可以模拟落叶松人工林不同林分条件下的林分平均胸径，平均树高，每公顷株数，林分断面积和林分蓄积量的生长过程。

Considering the fat-tail phenomenon that may exist in practical data, we have also studied the PTLE for the multi-t distribution model based on the three large sample tests above. Performances of the estimators according to the quadratic bias and mean square error are similarly compared in detail.

考虑到实际数据可能存在的厚尾情况，本文研究了文献中讨论颇多的多元t分布模型的基于大样本检验的等式约束预检验Liu估计，并同样在平方偏差和均方误差两个准则下对其优良性进行了详细比较。

In the process of building up the system, all the following works are done: confirming the index system of the gas pipeline by the maximum quadratic mean deviation analysis, caculating the index weight by the means of AHP, bringing forward three easy and useful methods (TOPSIS, the effect function and the integration index) of the gas pipeline's engineering schemes' multi-valuation and at last the mathematical models of the maximum compatibility degree is introduced to integrate all the results of all methods above.

在构建这个系统的过程中，主要从事了以下一些工作：通过统计理论中的最小均方差法分析确立了输气管道指标体系；采用层次分析法对输气管道指标权重进行了分析计算；提出三种简单易行的用于天然气管道设计方案评价的新方法：理想点法、效用函数法和综合指数法；最后将决策理论中的最大兼容度模型用于输气管设计方案评价中。

Independent variables are diameter class, relative diameter, number of stems per hectare, basal area per hectare, quadratic mean diameter, degree of closenessand sum of squared diameter of larger trees than th...

自变量有径阶、相对直径、每公顷株数、每公顷断面积、平方平均直径、郁闭度和大于所估径阶的林木直径平方和。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。