Objective To explore the application of the trend-surface model on geographical distribution of contagious diseases.
目的应用趋势面模型分析传染性疾病的地理分布趋势。
Results there is multi-collinearity bias in the result of the least square estimation trend-surface model, use the method of ridge regression can control the multi-collinearity bias.
结果趋势面分析往往存在共线性偏倚，利用岭回归趋势面分析可以在一定程度上控制共线性偏倚。
Objective to explore applicability of tri dimensional auto regression trend surface model in studying the space time dynamic of disease.
目的探讨三维自回归趋势面模型技术在疾病时空动态分析预测中的应用价值。
Methods To establish trend surface analysis (TSA) model of goiter rate of children aged 8 to 10 years by using the data on IDD evaluation in 2000 and regionalistic map of Sichuan province in 1999.
方法应用2000年四川省碘缺乏病评估资料和1999年四川省行政区划电子地图，建立四川省8～10岁儿童甲状腺肿大率趋势面分析模型。
The error of mathematical model is mostly resulted from near properties of the equations of trend surface.
数学模型误差——主要由趋势面方程的逼近特性所引起。
Results the tri dimensional auto regression trend surface model and the method to build this model were obtained.
结果获得三维自回归趋势面模型及其建模方法。
Linear models mainly include the factor analysis model and the trend surface model. And nonlinear models include BP neural network model.
其线性模型主要为因子分析模型和趋势面分析模型，非线性模型为BP神经网络模型。
Methods The trend-surface regressional model was based on multiple regression. Then trend-surface diagram was drawed according to the mathematical model.
方法以多元回归分析理论为基础，构造趋势面回归数学模型，并依据模型方程绘制趋势面层次分析图。
The map of daily surface air temperature distribution, using the modified Gaussian weighted model A and B, can accurately reflect the temperature-changing-with-topographical-altitude trend.
对于高斯权重法的两种改进方案得到的地面日气温分布图都能很好地反映出表面大气气温随地形高度的变化趋势。
The map of daily surface air temperature distribution, using the modified Gaussian weighted model A and B, can accurately reflect the temperature-changing-with-topographical-altitude trend.
对于高斯权重法的两种改进方案得到的地面日气温分布图都能很好地反映出表面大气气温随地形高度的变化趋势。
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