查询词典 least squares

The least squares technique for estimating regression coefficients minimizes this statistic, which measures the error not eliminated by the regression line.

用最小的计算方法来估计回归系数的最小值，从而来度量回归线中没有去除的偏差。

HEM is built up with projects history data by statistic regression analysis and the least squares.

用统计回归分析、最小二乘法拟合，建立了HEM数学模型。

Orthogonal least squares regression utilizes a greedy scheme to tune the parameters of each individual regressor term by term.

正交最小二乘是一种贪婪算法，采用逐步回归建模，每一步利用搜索算法找到最小化残差的一个回归项。

Nonlinear regressor model,quadratic blending model and radial basis functionneural network model were employed to describe the steady-state behavior of the gasoline blending process ,and the least squares algorithm was utilized to identify parameters in these models.

采用非线性回归模型、二次型调合模型以及基于RBF神经网络的并联模型等多种模型，对汽油调合过程的稳态特性进行建模与参数辨识。

An improved method for image restoration is presented in this paper,which is based on least-squares and regularization method.

在常用的最小二乘正则化方法的基础上，提出了一种改进的图像复原方法。

On this basis,, Least-squares method is adopted to decompose the total current according to applied macro-field strength, and then the equivalent conductivity under AC and relative permittivity of nonlinear composite dielectric are obtained.

在此基础上，利用时域最小二乘法依据外加电场对总电流分解而获得非线性介质的交流等效电导率和相对介电常数。

It is proved that the sum of squared residual of data fitting using TLS is less than that using least squares method.

证明了全最小二乘法解对数据残差平方和小于一般二乘解得残差平方和。

After that, the important equation for calculating reverberation time is given based on the definition of reverberation time and least squares method. Finally, we use our new method to calculate reverberation time in a rectangular enclosure; we also compare our results with those given by experiment and Sabine's equation. The comparison shows that the new method is more effective and accurate than Sabine's equation in calculating reverberation time of small enclosures.

给出了描述小尺度封闭空间内声场的有限元模型；在该模型的基础上推导了计算小尺度封闭空间内混响时间的方法，并编制了相应的计算机程式；在算例部分，计算了一矩形封闭空间内的混响时间，通过与实验结果进行比较，验证了这一方法的正确性。

The mean velocity distributions in turbulent boundary layers of smooth surface and two different riblet surfaces are measured with IFA300 constant-temperature anemometer in low-speed wind tunnel to validate the full development of turbulent boundary laye. Friction velocity and wall friction stress of turbulent boundary layer are obtained with the least-squares fitted curve of the sublayer velocity distribution based on Spalding formula, and virtual origin position of riblet surface can be acquired accurately.

在低速风洞中来流速度一定的情况下使用IFA300恒温热线风速仪测量了光滑表面和两种不同尺寸的脊状表面湍流边界层平均速度分布剖面，并验证了试验段湍流发展的充分性；通过应用Spalding壁面公式使用最小二乘法精准拟合了实验测量的边界层内层速度分布曲线，得到了湍流边界层壁面摩擦速度并进一步求得湍流壁面摩擦应力，较准确地计算出脊状表面的虚拟原点位置，并通过与对数律公式拟合结果比较分析，证实了该方法更加准确有效。

Then with partial least squares regression, neural network , and their integration, semidiurnal forecast model of skylights high water level was created.

将贵州省普定县后寨地下河流域内平山天窗水位变化划分为枯水位、开采－恢复、高水位三个阶段，采用偏最小二乘回归、人工神经网络及两种方法的结合建立了高水位阶段水位半日预测模型。

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。