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!25"!1#&'()&*+,-Vol.25No.1 2014$2%JournalofWaterResources&WaterEngineeringFeb.,2014 DOI:10.11705/j.issn.1672-643X.2014.01.47 '1~F€fYZ„µ9GxyfBC /Î,0(P,/1C (5eTÎde{eW?fee',5e£Y610068) DE:{|ðUV'Ÿ§56¬n?‡|,žz!¬´jPQBC(󟧬feJkUV¬§!J。‘úéš uv÷@q—¬{|z!˜2Š‹,Àøþ«Šù®j¹«,äåø›¬÷@q—¯°,{|z!û˜2。øi, ”l£YP¬=f[(!¬p—Ÿ§©ª,ß[÷@q—Š‹,IÛ{|z!¬˜2ž%,E,;,pg1ã。 FGH:{|z!˜2;øþ«Šù®;÷@q—;=f[(!;£YP IJ>KL:TV213MNOPQ:AMRSL:1672643X(2014)01021403 Studyonassessmentmethodofdataquality basedoncrossvalidation LINGYun,LWangyong,ZHANGLijing (SchoolofMathematicsandSoftwareScience,SichuanNormalUniversity,Chengdu610068,China) Abstract:Dataisanimportantbasisfordecisionmakertoanalyzeproblems.Thedataqualitystraightly affectsthescientificalnessofstatisticalanalysisandthecorrectnessofpolicymaking.Thearticlepro posedamethodofdataqualityassessmentbasedoncrossvalidationandestablishedtheoptimalmodelof crossvalidationtoassessdataqualityincriterionoftheminimummeansquareerror.Finally,throughthe empiricalanalysisofChengdudomesticwaterconsumption,theresultsindicatedthattheuseofcrossvali dationmethodmadetheassessmentofdataqualitymorereasonableandconformedtheactualsituation. Keywords:assessmentofdataquality;minimummeansquareerror;crossvalidation;demesticwater consumption;Chengdu {|z!˜2ð<=、¶s、ËEX¶¬{||z!˜2Š‹,™õ£YP1978-2011y¬=f ¬z!¥¦fe¬、pA>𬟧k˜™,@j![(!{|[7],Àøþ«Šù®j¹«,äåø› J、£[J、XËJ、I(Jp\IgJ[1]5FŠ¬÷@q—¯°,{|z!û˜2。 ܝ{|¥¦˜2。{|z!¬´jPQBC(ó 1qrÂÃ_VÄ^ŽHº89 Ÿ§¬feJkUV¬§!J,úp,{|z!˜2 ¬0¬ð¶âwx{|¬I(h²,p0§!Û[÷@q—ð8…uvù,{|¯°¬q—Š {|,œ¹ÒJ¬îõçè,@Ýé´{|¬z‹,žuƒì<ð:O‚ƒ{|X=(x1,x2,…, [2]x),3žÕºŸ¶A、Br#Ÿ,A=(x,x,…, !。0DÍv{|z!˜2¬Š‹O¨Ç。Än111A1A2 [3]x),B=(x,x,…,x),p<q<np+ rKb……s~â7¼Í'Tq‹、ó!¯°ŸAp1B1B2BqžÄS §‹、“6{|n2‹、(óŸTq‹、<=ù®q=n(¦1),pB1Ĭ{|û¶‚ƒ,ú|‚ƒ{ |¬Þƒ¡oäå¹æ¯°f(x),ù,AĬ{ ˜2‹p\Çò˜2‹À{|z!¬˜2Ĭß1B11 [4]^ [;¸[Äbß[nùMM2󊋘2GDP{,A=(x^,x^,…,x^) |3ù,‰1A1A2AAPWGp‰¾S [5] |z!;´Tsbß[GòŸ§‹˜2³©{|³,ó6«Šù®: [6] z!;¹Æœbß[©‡ý¼t©JŠ‹˜2Äp (x-x^)2 :GDP{|z!。÷@q—Š‹^2A¹[v{∑AiAi MSE=i(1) |z!˜2Ä。¤.,ƒ‘éšuv÷@q—¬{1p !"#$:20130620;%&#$:20130729 '()*:5e