查询词典 least squares

The estimation bias is compensated by introducing a correction term in the recursive least squares estimate.

通过在递推最小二乘算法中引入一个修正项，补偿过程噪声引起的估计偏差。

On the basis of the theory of least-squares collocation, the approach used to define a local covariance function is described.

从最小二乘配置方法的原理出发，描述了最小二乘配置法中经验协方差函数的确定方法。

The elementary theory of Least-Squares Collocation in Physical Geodesy is described in detail in this thesis, as well as the method defining the covariance function, which is the key problem when utilizing LSC in physical geodesy.

本文描述了最小二乘配置法的基本原理及其基础理论，详细探讨了经验协方差函数的确定方法。

Secondly, by the P-L estimation of survivor function, this paper proposed the regression models of polynomial cumulative hazard function distribution models, respectively in the case of complete date and random right censoring date; meanwhile generalized least squares estimations of unknown parameters were proposed respectively using two steps algorithm and principal component analysis algorithm.

与已有的关于多项式危险函数模型的研究成果相比，首先本文在统计模型的构造上充分考虑了累积危险函数乘积限估计量的非独立性，给出了协方差矩阵的估计；其次在模型检验方面，本文利用非参数回归分析方法，充分利用了数据本身的信息，减少了对回归关系假定的主观因素，因而分析结果更为可靠。

This procedure is the core of the least-squares method of curve fitting.

这个程序的核心是用最小二乘法进行曲线拟合。

The influence of least squares curve fitting algorithm to the result of measurement has been analyzed too.

并分析了最小二乘曲线拟合谱线的线宽对测量线宽的影响。

Basic function of arbitrary combinations least squares curve fitting of the...

对任意基本函数组合进行最小二乘曲线拟合的源程序。

Basic function of arbitrary combinations least squares curve fitting of the source.

对任意基本函数组合进行最小二乘曲线拟合的源程序。

In order to realize this target, the compression behavior of SC100-T6 aluminum alloy was studied under the circumatance of different deformation temperature and deformation strain ratio using the Gleeble 1500 thermal stress-strain simulator. The constitutive relationship of this kind of Al-alloy was established using the least squares fit method.

为了实现这一目的，作者应用Gleeble-1500热力学模拟试验机对不同的温度和变形速率下的铝合金SC100-T6进行等温压缩试验，得到了合金的流动应力与成形温度、应变速率的变化规律，并应用最小二乘法建立了该种合金的本构方程。

Based on these experimental spectra, desorption activation energies of benzene, thiophene, and octane on NaY were calculated by a traditional model, the least-squares method, and the first differential curve of the TPD model.

以这些TPD谱图为基础，分别采用传统TPD计算模型、最小二乘法以及一阶微分曲线法计算了苯、噻吩和正辛烷在NaY上的脱附活化能和动力学参数。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。