数学建模练习小论文1

Dothefollowingthreemainpoints:1findouttheweak.Reviewprocessistosumuptheknowledgeontheonehand,maketheknowledgemorecoherentsystemandregularity,butalsoletthestudentsthemselves,looksupthedeficiencies.So,weteacherstounderstandthestudents'knowledgeofthesituationpriortothereview,studentsnotonlyfoundwidespreaddeficiencies,butalsosomeshortcomings,forthesewelldesignedprograms,reasonablearrangementoftime,thisreviewismoretargetedandmoreeffective.Forexample,youcandesignaformforinvestigation,understandingstudents'weaknessesineachknowledge,putitasareviewofkey,combinedwiththeproblemoftextbookstoreview,bothtoavoidcastinganettihaizhanshu,andimprovetheefficiencyofreview.2,goodcollation.Throughsixyearsofstudy,studentsinthebasics,readingmethod,exercises,andsoalreadyhaveacertaindegreeofaccumulation,thereviewstage,teachersshouldknowhowtoguidethestudentstolabeltheaccumulation,process,formasystemofknowledgenetworks.Exercisesforstudentstoberepresentative,fine,complete,tolive,andearnestlydoaproblemlearningamethod,classofpasswastogettimeefficientreviewresults.3,payattentiontouse.Theaccumulationofknowledgeisultimatelytouse,therefore,reviewthesituationandlifesituationtobecreatedinavarietyoflanguages,guidestudentsonthebasisofthepreviousaccumulationofknowledgetousetothemaximum,andreallyapplywhattheyhavelearned.Second,reviewthecontentandstrategyofthefirstpart:thebasics(a)1,reviewthemainpointsofHanyuPinyinisabletoreciteandwritedownthealphabetofHanyuPinyin;accuratespellingpronunciation(afterreadingcacuminal,nasalsound,light,andretroflexsounds),thecorrectwriteconsonants,vowelsandsyllables.2,.maintypesaccordingtotheorderofthealphabetofHanyuPinyinalphabeticalorder;fillintheappropriateuppercaseandlowercaseletters;seephoneticwritingwords;pinyintowritesentenceswithdottoselectthecorrectpronunciationoftheword;tobringsomeinitialconsonantsorvowels,wordselection.Second,themaintypesofwords(1)Rubywrittenwords;(2)tobringWordtoselectthecorrectpronunciation;(3)useasequencerandradicalcharacterlookupmethod无论是统筹推进“五位一体”总体布局，还是全力推进全面建成小康社会进程，乃至实现“两个一百年”奋斗目标，都需要不忘初心，继续前行。中国省、自治区城市规模结构分类一、省、自治区的规模结构综合评价分类：（1）建立综合评价指标体系省、自治区的综合城市规模结构是取决于多个相关因数综合评估的，综合因数特征主要体现在的相关方面.遵循可比性原则，从省、自治区的城市的多方面中选取5项评价指标，具体如图1.图一、城市规模结构特征数据（2）数据资料指标的原始数据取自《中国统计年鉴，1999》到五项指标值见表1.其中：1x为城市规模；2x为城市首位度；3x为城市指数；4x为基尼系数；5x为城市规模中位值.（3）R型聚类分析定性考察反映省、自治区城市规模结构五项评价指标，可以看出，某些指标之间Dothefollowingthreemainpoints:1findouttheweak.Reviewprocessistosumuptheknowledgeontheonehand,maketheknowledgemorecoherentsystemandregularity,butalsoletthestudentsthemselves,looksupthedeficiencies.So,weteacherstounderstandthestudents'knowledgeofthesituationpriortothereview,studentsnotonlyfoundwidespreaddeficiencies,butalsosomeshortcomings,forthesewelldesignedprograms,reasonablearrangementoftime,thisreviewismoretargetedandmoreeffective.Forexample,youcandesignaformforinvestigation,understandingstudents'weaknessesineachknowledge,putitasareviewofkey,combinedwiththeproblemoftextbookstoreview,bothtoavoidcastinganettihaizhanshu,andimprovetheefficiencyofreview.2,goodcollation.Throughsixyearsofstudy,studentsinthebasics,readingmethod,exercises,andsoalreadyhaveacertaindegreeofaccumulation,thereviewstage,teachersshouldknowhowtoguidethestudentstolabeltheaccumulation,process,formasystemofknowledgenetworks.Exercisesforstudentstoberepresentative,fine,complete,tolive,andearnestlydoaproblemlearningamethod,classofpasswastogettimeefficientreviewresults.3,payattentiontouse.Theaccumulationofknowledgeisultimatelytouse,therefore,reviewthesituationandlifesituationtobecreatedinavarietyoflanguages,guidestudentsonthebasisofthepreviousaccumulationofknowledgetousetothemaximum,andreallyapplywhattheyhavelearned.Second,reviewthecontentandstrategyofthefirstpart:thebasics(a)1,reviewthemainpointsofHanyuPinyinisabletoreciteandwritedownthealphabetofHanyuPinyin;accuratespellingpronunciation(afterreadingcacuminal,nasalsound,light,andretroflexsounds),thecorrectwriteconsonants,vowelsandsyllables.2,.maintypesaccordingtotheorderofthealphabetofHanyuPinyinalphabeticalorder;fillintheappropriateuppercaseandlowercaseletters;seephoneticwritingwords;pinyintowritesentenceswithdottoselectthecorrectpronunciationoftheword;tobringsomeinitialconsonantsorvowels,wordselection.Second,themaintypesofwords(1)Rubywrittenwords;(2)tobringWordtoselectthecorrectpronunciation;(3)useasequencerandradicalcharacterlookupmethod无论是统筹推进“五位一体”总体布局，还是全力推进全面建成小康社会进程，乃至实现“两个一百年”奋斗目标，都需要不忘初心，继续前行。可能存在较强的相关性.比如城市首位度与城市指数，城市规模和城市规模中位值.为了验证这种想法，运用MATLAB软件计算五个指标之间的相关系数，相关系数矩阵如表3所示.计算的MATLAB程序如下：loadgi.txt%把原始数据保存在纯文本文件gi.txt中r=corrcoef(gi)%计算相关系数矩阵d=1-r;%进行数据变换,把相关系数转化为距离d=tril(d);%取出矩阵d的下三角元素d=nonzeros(d);%取出非零元素d=d';%化成行向量z=linkage(d,'average');%按类平均法聚类dendrogram(z);%画聚类图T=cluster(z,'maxclust',4)%把变量划分成4类fori=1:4tm=find(T==i);%求第i类的对象tm=reshape(tm,1,length(tm));%变成行向量fprintf('第%d类的有%s\n',i,int2str(tm));%显示分类结果end234150.30.40.50.60.70.80.91图二指标聚类树型图图三相关系数矩阵1x2x3x4x5x1x1.00000.02390.33980.36540.40372x0.03290.70381.00000.2127-0.2261Dothefollowingthreemainpoints:1findouttheweak.Reviewprocessistosumuptheknowledgeo