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曲线回归

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Type Decline Characteristics Linear Regression analysis Water drive Curve

类型;递减;特征;线性;回归分析;水驱;曲线

Via sampling test, comparing model of stepwise regression, calculating curve and forecast, we may know: these models is better and can be applied directly into practical safety monitoring work.

通过抽样测试法测试、并与建立的逐步回归模型比较以及拟合曲线和预测分析均表明:采用上述模型有很好的效果,可直接应用于实际工作中。

Second,a new estimator called generalized rootpower estimator of regression coefficients in growth curve model is obtained.For the newestimator,its superiority over the LS estimator and the root power estimator,and its admissibilityare proved.Two methods,two kinds of arithmetic of choosing the generalized root powerparameters are introduced.A demonstrative practical example is provided.

对增长曲线模型中的回归系数矩阵提出了一种新的估计——广义根方估计,并证明了通过广义根方偏参数的适当选取可使得该估计在均方误差和均方误差矩阵的意义下优于已有的最小二乘估计估计和根方估计;及证明了广义根方估计是可容许估计;还给出了选取广义根方偏参数的两种方法、算法和应用实例。

Research on Regular Polygon Continuous Forming Principle and Mathematical Model Based on Straightness Constraint Condition

性质:在回归分析中,用来描述具有线性关系的因变量,y与自变量xi的关系曲线,其一般表达式是y=a+∑bixi,i=1,2,…,n。

By using regression analysis method the reduced relaxation and creep functions were acquired.

用回归分析的方法处理实验数据,得出了归一化应力松驰函数、蠕变函数及曲线。

Firstly, the row crop and background were segmented by the excess green value. Secondly, the image strips were divided by crop image horizontally and the position was calculated by detecting the peak on the curve resulting from vertical projection of strips. Finally, the crop rows center lines were accomplished by robust regression.

对作物图像运用过绿特征值分割作物和背景,将得到过绿特征图像划分为若干水平图像条,对图像条过绿特征值进行垂直投影,求取投影曲线上突出峰点的位置;利用稳健回归法对位置点进行线性拟合得到作物的行中心线。

Keywords Capillary Pressure Curve Pressure Saturation Linear Regression analysis

毛细管压力;曲线;压力;饱和度;线性;回归分析

P for short at different temperature was studied by using the method of predictive microbiology. Growth curves were obtained at 4~40℃. and foud that the Gompertz model fit at 10~40℃ with representation of experimental curves which are typical sigmoidal.

结果表明,在10~40℃,副溶血性菌弧的生长曲线呈典型的S形,适合用Gompertz和logistic模型拟合;当温度在4~10℃时,适合用线性回归方程拟合。

Then, we formulated the simultaneous differential equations and the car following theory which explain the urbanization motion track and these two kinds of process. The case study using the regression analysis to construct and verify the modal analyzes the regular pattern of urbanization and differences of development among twelve urban land readjustment areas in Tainan.

其次,提出具有数学意义的建地化、市街化基本原理,据此建立联立微分方程式,并且使用「跟车理论」的物理决定论类推说明市街化曲线模型,以把握市街化运动的具体法则;并以台南市12个重划区为实证地区,利用回归分析方法来进行模式校估及检定,俾利於分析市街化之规律性及各地区之发展差异。

The nonlinear regression function of mathematic tool software SPSS was used to build models about DBH, high of tree, volume of single timber and stand volume slash pine plantation, and these models are have a certain extant applicability.

利用SPSS的曲线估计和非线性回归功能,获得了具有一定适应性的湿地松人工林胸径生长模型、树高生长模型、单株材积模型、林分蓄积量模型。

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