GAMS基本语法及案例分析

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GAMS软件培训材料——基本语法及案例分析(内部使用)第一章GAMS的基本操作方法:.......................................41.0进入GAMS系统:.............................................41.1.1File|New:..............................................51.2EditMenu(其功能和MicrosoftWords编辑的功能一样):........141.3SearchMenu:..............................................151.4WindowMenu:..............................................161.5HelpMenu:可查询GAMS语法及其操作方法.....................17第二章GAMS的程序语法:..........................................19一、集合和索引..............................................20二、数据输入:参数、标量和表格.................................25三带参数的基本运算...........................................28四.变量......................................................33五.方程......................................................36六.模型......................................................37七.结果输出(display).......................................38八.GAMS模型库...............................................39第三章GAMS特殊符号与命令........................................40一、条件$符号..................................................40二、options命令...............................................41三、程序控制命令(loop语句、if-else语句).....................42四.GAMS的其它语法及注意事项:...............................46五.GAMS软件与EXCEL软件的联合应用...........................48第四章案例分析.................................................50案例一:简单的种植水平模型.....................................50案例二:家庭效用最大化.........................................55案例三:非线性回归问题.........................................57案例四:经济最优增长Ramsey模型...............................58案例五:OPEC最佳定价和开采量模型..............................61案例六:工业污染控制问题.......................................63案例七:简单投资组合模型.......................................66案例八:贷款偿还因素问题.......................................68案例九:最优增长模型...........................................71案例十:Ajax纸业公司生产计划..................................73案例十一:基本生产和库存模型...................................75案例十二:Robust最优化问题....................................78案例十三、$titleMathOptimizerExample1(MATHOPT1,SEQ=255)....79案例十四、$titleMathOptimizerExample2(MATHOPT2,SEQ=256)....81案例十五、$titleMathOptimizerExample3(MATHOPT3,SEQ=257)...82案例十六、$titleStochasticProgrammingExample(PRODSP,SEQ=186)...............................................................83案例十八、简单CGE模型.........................................86THEFIFTHCHAPTERTHESIMPLECGEMODEL.........................905.1Householdbehavior.........................................905.2Firmbehavior..............................................915.3Market-clearingconditions.................................935.4TheSocialAccountingMatrix...............................935.5Value,priceandquantity..................................955.6ThebasicconceptofCalibration...........................955.7Calibrationprocedure–thecasewithoutindirecttaxes....965.8GAMSprogramming...........................................98THESIXTHCHAPTERTHESTANDARDCGEMODEL........................996.1Firmbehavior(includingIntermediateinputs).............1006.2Investmentandsavings....................................1026.3Modificationofhouseholdandgovernmentbehavior.........1026.4Armington’sassumption...................................1036.5Substitutionbetweenimportsanddomesticgoods...........1046.6Transformationbetweenexportsanddomesticgoods.........1056.7Market-clearingconditions................................1066.8Modelsystem..............................................1066.9Calibration...............................................1086.10CalibrationoftheCESfunction..........................1086.11CalibrationoftheCETfunction..........................1096.12Estimationofsavingsrates..............................1096.13GAMSprogramming.........................................110A.5Communicatingwithspreadsheetsoftware..................110第七章实用的CGE模型构建及应用(静态)........................1131.部门划分....................................................1132.生产要素....................................................1133.经济行为主体................................................1137.1社会核算矩阵:.............................................1207.2模型方程:.................................................1217.3Theprogram:..............................................122第八章实用的CGE模型构建及应用(动态)........................1228.1TheSAMTable:............................................1228.2Themodel:................................................1228.3Theprogram:..............................................122参考文献:........................................................123第一章GAMS的基本操作方法1:1.MenusandWindows1.0进入GAMS系统1.1FileMenu1.2EditMenu1.3SearchMenu1.4WindowsMenu1.5HelpMenu1.0进入GAMS系统:1选自台湾国立清华大学黄宗煌教授“GAMS基础篇——中文操作手册及程序式语法”当GAMS软件安装好之后,在电脑桌面上会出现GAMS-IDE之图像,请点击此按钮进入GAMS系统,出现画面如下图所示:1.1FileMenu:1.1.1File|New:打开新的编辑视窗,请选择File|New指令或按键盘Ctrl+N,即可编写新的GAMS程式,出现画面如下图所示:1.1.2File|Open:打开一个或者多个已存在档案,请点选File|Open指令、或按键盘Ctrl+O、或在GAMS介面中点击按钮,会出现开启档案的视窗,然后按照档案存储的路径开启档案,按Shift+Ctrl+↓可选择多个GAMS档案,出现画面如下图所示:1.1.3File|OpeninNewWindow:打开一个或多个已存在档案在新的编辑视窗,其操作方法同1.1.2。1.1.4File|ViewinExplorer:先开启一个已存在的GAMS档案,再选择File|Vie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