天津市醫(yī)院門診就診人次與大氣污染的相關性研究.pdf

1、中國科學技術大學碩士學位論文天津市醫(yī)院門診就診人次與大氣污染的相關性研究姓名：徐健申請學位級別：碩士專業(yè)：概率論與數(shù)理統(tǒng)計指導教師：張曙光20110408ABSTRACTIIABSTRACTIndertoexpletheeffectsoftheairpollutionondailyoutpatientvisitsofhospitaltherelationanalysistheregressionanalysisisusedtoanaly

2、zetherelationshipbetweentheSO2NOxPM10concentrationsthedailyoutpatientvisitsofthedepartmentofrespiratydiseaseinternalmedicineemergencyothynolaryngologyinTianjinFourthCentralHospitalin2010.SincethereisMulticollinearitybetw

3、eenindependentvariablesinadditiontousestepwiseregressionweshouldalsotakeconsiderofprincipalcomponentregressionridgeregressionpartialleastsquaresregressionanalysis.Meoverweusetheresidualanalysismulticollinearityanalysisto

4、testtheapplicabilityofthesemodels.Weusethepredictionresidualsumofsquares(PRESS)minimumstardstocomparestheaccuracyofthemodelobtained.Theresultsshowthattheprecisionofstepwiseregressionprincipalcomponentregressionmodelisclo

5、sewhilethepartialleastsquaresregressionridgeregressionmodelsaresignificantlybetterthantheother.Thebestfitmodelsshowthattheregressioncoefficientofthethreepollutantsisallpositive.Howeverthenumbervarieswidely.Theregressionc

6、oefficientsofNOxwererelativelythelargestwhereastheregressioncoefficientsofPM10istoosmalltobeigned.TheresultsshowthattheintegratedimpactofNOxSO2especiallythepollutionofNOxisthestatisticallysignificantinfluentialfactfthere

7、spiratyinternalmedicinedisease.NOxisthemainpathogenicfactofinternalemergencydiseaseaswellasothynolaryngologicaldisease.Thereistwomaincreativepoints.Firstthereisnoresearchconcerningontheassociationofairpollutionwithdailyo