One of r's strengths is its ability to calculate linear, as well as nonlinear regression models.
计算线性与非线性回归模型的能力是R的强大功能之一。
Many researchers use nonlinear regression more than any other statistical tool.
很多研究人员使用非线性的回归多于任何其他统计工具。
An improved grey GM (1, 1) model using a technique of nonlinear regression is proposed.
提出了一种结合非线性回归技术的灰色GM(1,1)模型的改进模型。
The empirical formula is gained by using nonlinear regression of those operation points.
对这些操作状态进行多元非线性回归，得到在全操作范围都通用的经验公式。
Based on BP network, the example of nonlinear regression by artificial neural networks is given.
以BP网络为例给出了基于人工神经网络的非线性回归实例分析。
The LS-estimator in nonlinear regression problems is an important statistical estimator problem.
非线性回归的LS估计问题是一类重要的统计问题。
With the nonlinear regression method, results can be improved to get more optimal regression functions.
结合非线性回归方法，可以对回归结果进一步优化，得到更优的回归方程。
The mode of temperature gradient of this Bridges box girder is developed by the method of nonlinear regression.
采用非线性回归的方法，提出了该桥混凝土箱梁的温度梯度模式。
The model of post-dynamic recrystallization has been obtained by using multivariate nonlinear regression analysis.
采用多元非线性回归法得到了后动态再结晶模型。
The paper also discusses the corresponding problem when the errors in nonlinear regression models is an MA(1) sequence.
此外，当误差项是一阶滑动平均序列时相应的检验问题也作了讨论。
Several approximate formulas are given for residual analysis of the least square estimator in nonlinear regression model.
本文给出了若干近似公式，以分析非线性回归模型的最小二乘估计的残差。
The research on nonlinear regression, weight methods, standard curve, three periods ANOVA, rank sum test, was accomplished.
完成了非线性拟合与加权计算方法、标准曲线、三周期方差分析、秩和检验等研究工作。
The empirical relationship of the differences was obtained using nonlinear regression method and verified with the determined data.
用非线性回归方法得出了水样不同处理方式下总磷间的经验关系式，并进行了验证。
For the influence of temperature to EGO sensor's output, its nonlinear regression models which include temperature's modifying term be achieved.
针对温度对废气氧传感器输出的影响，建立了带温度校正的EGO传感器非线性回归模型。
Maths model is built up to show the relationship of density with locating place using multiple nonlinear regression analysis of experimental results.
根据试验数据，应用多元非线性回归方法建立了密度与摆放位置关系的数学模型，并讨论了改善烧结密度的措施。
On the basis of our mathematic models of the titration, the content and conditional dissociation constant may be determined by using nonlinear regression.
根据多元酸碱滴定计算通式，针对实际情况化简后，非线性回归同时求出浓度和条件离解常数。
On this basis, the empirical computing formula of skewed-plate bridge maximum reaction for design is obtained using poly cell nonlinear regression method.
在此基础上，应用多元非线性回归方法得到了斜板桥最大支反力实用设计计算公式。
By the curvature measures, the diagnostic statistics of measuring influence in nonlinear regression with restriction are obtained in terms of curvature arrays.
在此基础上导出了带约束非线性回归模型度量影响的诊断统计量及其曲率表示。
The predictive models of fuzzy graph, nonlinear regression and with grey theory are set up from different aspects by analyzing the features of road traffic accidents.
通过分析道路交通事故发生的特点，从不同的角度，建立了模糊图模型、非线性回归模型及基于灰色理论的灰色预测模型。
We combine unitary nonlinear regression with multivariate linear regression, it can reduce the error sum of squares of the model and improve the precision of forecast.
即把一元非线性回归和多元线性回归结合起来，构造一个混合回归模型，这样就减小了模型的残差平方和，从而提高预报的准确性。
The model parameters were calculated through the nonlinear regression algorithm. Thus, the formula of heat transfer coefficient for the quenching process was obtained.
通过非线性回归算法对模型参数进行回归计算，最终取得整个淬火过程的换热系数公式。
A support vector regression method based on classification is presented to solve the nonlinear regression problem with unknown data distribution and mathematical model.
提出了一种基于分类技术的支持向量回归方法，解决数据分布未知、数学模型未知的非线性回归问题。
By nonlinear regression analysis the change law is found that with the increase of geostress the permeability coefficient will decrease with negative exponential trend.
然后通过回归分析，可以发现该地区渗透系数随地应力值的增大呈负指数递减的变化规律。
The static state models of an EGO sensor were obtained by using piecewise polynomial method and nonlinear regression analysis method based on available experimental data.
在发动机实验台上，采用比较法对EGO传感器进行了稳态标定实验。
Data smoothing is a perpetual topic in mathematical statistics. In practice we usually use regression to smooth data, including linear regression and nonlinear regression.
数据拟合是数理统计学中的一个永恒话题，在实际工作中我们最常用的拟合方法是回归分析，其中包括线性回归和非线性回归。
Afterwards the results are analyzed through nonlinear regression in order to get the function between the amount of dust particles and time of vibration and vibration frequency.
进而对结果进行多元非线性回归拟合，确定了尘土量与振动时间、频率因素的函数关系。
So far, however, the theory that studies specially the statistical models with dependent data such as nonlinear regression and nonparametric regression models is not very satisfactory.
然而，对各种具体的相依数据的统计模型(如相依数据的非线性回归和相依数据的非参数回归模型)的研究还不够充分和不够完备。
Linear regression equation is analyzed by using indirect error-smoothing, and nonlinear regression equation is optimally selected by using the method of comparison of mid-point of curve.
用间接观测平差法分析线性回归方程，用曲线中点比较法选择最优非线性回归方程。
Simulation results and real measuring data calculations show that the precision estimation efficiency can be obtained by our method for a large class of linear and nonlinear regression models.
仿真和实算结果表明，对于一大类线性和非线性回归模型，该方法给出的回归模型的参数估计效率的估计更接近模型参数估计效率的真值。
In this paper, a new model system is introduced, which synthetically applies time series model, nonlinear regression and combination forecasting model to forecast the change of the market price.
文章通过对一套市场价格预测模型体系的介绍，综合运用时间序列模型、多元非线性回归和组合模型来预测市场价格走势，探索从多角度综合预测市场价格的问题。
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