HomeworkforLecture4DataMining&GraphMaking081121班唐梦煦08610103为了维护知识产权请老师看下我截图的时间，这个可以说明是我自己做的不是复制粘贴别的同学的作业。数据挖掘的过程：第一步在网页中键入HYPERLINK"http://comtrade.un.org/db/default.aspx"http://comtrade.un.org/db/default.aspx，回车后打开网页，进入Uncomtrade数据库点击DataQuery下拉菜单选择ShortcutQuery如下图所示：在网页中选择Import在of的产品中键入potash选择recentyears，以中国为研究对象所以在to后面选择china，from后面先选择world，in后面选择HSreported。一切输入好后点击Search摁扭。如下图所示：在之后出现的页面中勾选两个代码的钾肥的SearchResults，点击ViewTradeData，如下图所示：之后便可得到近些年中国从世界进口钾肥的数据，如图所示：PeriodTradeFlowReporterPartnerCodeTradeValueNetWeight(kg)QuantityUnitTradeQuantityFlag2005ImportChinaWorld2815$25,569,54852,991,719852,991,71962006ImportChinaWorld2815$24,010,43131,589,269831,589,26962007ImportChinaWorld2815$27,572,13737,504,372837,504,37262008ImportChinaWorld2815$23,489,63023,525,778823,525,77802009ImportChinaWorld2815$23,435,52336,140,872836,140,87202005ImportChinaWorld281520$6,219,1515,383,35585,383,35562006ImportChinaWorld281520$5,926,8514,753,08984,753,08902007ImportChinaWorld281520$7,628,4525,044,85785,044,85762008ImportChinaWorld281520$8,425,9293,417,51283,417,51202009ImportChinaWorld281520$6,083,0871,975,04581,975,0450按此方法依次可得到近些年中国从澳大利亚，俄罗斯，加拿大的钾肥进口数据，数据如下：PeriodTradeFlowReporterPartnerCodeTradeValueNetWeight(kg)QuantityUnitTradeQuantityFlag2005ImportChinaAustralia2815$22,74554,905854,90502006ImportChinaAustralia2815$10,29218,629818,62962007ImportChinaAustralia2815$36,51037,636837,63602008ImportChinaAustralia2815$18,36618,765818,76502009ImportChinaAustralia2815$9,0776,65086,65002006ImportChinaAustralia281520$2328202007ImportChinaAustralia281520$905850PeriodTradeFlowReporterPartnerCodeTradeValueNetWeight(kg)QuantityUnitTradeQuantityFlag2003ImportChinaCanada2815$2,6662,87782,87702004ImportChinaCanada2815$5,6177,69387,69302005ImportChinaCanada2815$13,84112,816812,81602006ImportChinaCanada2815$7,7368,15388,15362007ImportChinaCanada2815$2,7812,32782,32702003ImportChinaCanada281520$684100810002005ImportChinaCanada281520$3,451460846002006ImportChinaCanada28152