l用spss求函数参数.ppt

用spss求函数的参数 用spss求函数参数 在具体的题目中，经常会给你一组数据，并告诉你该组数据满足的函数类型，求函数的参数。 那么该如何求呢？现在以一个例子说明。 例：正戊烷(C5H12)的饱和蒸汽数据列于下表，试求饱和蒸汽压P(KPa)与温度T(K)的关系。(已知安托尼公式为lgP=A-B/(T+C)，假设该溶液为理想溶液) 解：已知的函数不能用已知的模型来拟合，所以我们得输入函数，进而求解。 1.首先启动spss软件。 2.输入数据。（如下图） 3.依次点击：分析、回归、非线性弹出如下窗口。 4.?在因变量中输入“饱和蒸汽压”，模型表达 式中输入“EXP(A-B/(T+C))”。 ?点击“参数”，在名称中输入“A”，在初始值中输”0“，然后点击添加。依次这样输入参数B、C。 5.点击约束弹出如下对话框，选择定义参数约束，并按图上填写之后点继续。 6.点击选项，进入选项的对话框，默认值不需要修改，点击继续。 7.点击确定，得出输出结果。 8.由表可得：A=13.782，B=2459.396，C=-40.923。 9.函数方程为：lgP=13.782-2459.396/（T-40.923）。 * * Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 温度T/K 223.1 233.0 244.0 251.0 260.6 275.1 291.7 309.3 饱和蒸汽压P/Pa 1.3 2.6 5.3 8.0 13.3 26.6 53.2 101.3 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Prof