文档介绍：该【数学外文翻译外文文献英文文献真空压力播种机数学建模 】是由【雨林书屋】上传分享，文档一共【26】页，该文档可以免费在线阅读，需要了解更多关于【数学外文翻译外文文献英文文献真空压力播种机数学建模 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。目Introduction????????????????????3引言??????????????????????? ????????????????4材料和方法???????????????????? ????????????????7果与???????????????????? 21Conclusions????????????????????13?????????????????????? ????????????????13 ?????????????????????26Mathematical Modelling of Vacuum Pressure on 1, 2andA.? zmerzi 11AkdenizUniversity,FacultyofAgriculture,DepartmentofAgriculturalMachinery,07070,Antalya,Turkey2?ukurovaUniversity,FacultyofAgriculture,DepartmentofAgriculturalMachinery,Adana,Turkey;e-mailofcorrespondingauthor: ******@; accepted19January2004. ,projectedarea,,cotton,soyabean,watermelon,melon,cucumber,,projectedarea,,5–77mm2,–%and440–1310kgm-3,;,soyabeanandwatermelonI;,melonandcucumber;;,thefinalmodelcouldsatisfactorilydescribethevacuumpressureoftheprecisionvacuumseederwithachi-×10-3,×10-,b,c,d,eregressioncoefficientsEm modellingefficiencyErms rootmeansquareerror-1-kexpexperimentalvacuumpressure,kPakexp,meanmeanvalueofexperimentalvacuumpressure,kPakprepredictedvacuumpressure,kPaLlength,mmm1000onethousandkernelmass,gNnumberofobservationnnumberofconstantsinthemodelPprojectedarea,mm2Pvvacuumpressure,kPapprobabilityR2coefficientofdeterminationthickness,mmWwidth,mmsphericity,%2chi-squareχ-3ρkerneldensity, years;however, most oftheresearchanddevelopment work hasdealt :,:betterworkingquality,-2-morepreciseseedrateswithlowerrateofseeddamage,bettercontrolandadjustmentofupkeepanddriftofseeds,andbroaderspectrumofapplicability( Soosetal.,1989).,soilconditions,,processing,,grading,,,usingsomeofthese,,projectedarea,sphericityandkerneldensity,:twodifferentmaizevarieties(maizeIandmaizeII),cotton,soyabean,twodifferentwatermelonvarieties(watermelonIandwatermelonII),melon,cucumber,(soyabean,maizeII)toflatandelongated(maizeI,melon,watermelon,cucumber).Twodifferentvarietiesofmaizeandwatermelonseedswereselected,housandkernelmass,projectedarea,-3-· theseedasitwasreleasedfrom seederunit without rolling (Brooks&Church,1987;Karayel&zmerzi,2001;Jasa&Dickey,1982).-electronicsensorsystem(Bracyetal.,1998;Smithetal.,1991;al.,1999).Afewtestsusedperformancemeasuresinvolvingdistancebetweenseedssownintosoil(Panning,1997).Aprecisionvacuumseederunitwasoperatedinalltreatments( ). 5mmindiameter·formaizeI,II,soyabeanandcotton;2 5mmindiameter·forwatermelonI,II,melon,andcucumberand15mm·(12mm)oftheseederwaskeptlowinordertoreducethechanceofnon-urduetothebouncingofseed,.-4-:1,vacuumplate;2,seed;3,seedbox;4,airsuctioncanal;5,aircut;6,furrowopenerTheseederwasoperatedoverthegreasedbeltatagroundspeedof1ms-,,,II,soyabeanandcotton;,,,watermelonI,IIandcucumber;,,,170mmforcotton,105mmforsoyabean,550mmforwatermelonI,II,melonandcucumber,(1995).‘skips’.%(1995)mendedusingmissindex,multipleindex,,missindex,multipleindex,,projectedarea,housandkernelmassarethemostimportantfactorsindeterminingtheoptimumvacuumpressureoftheprecisionvacuumseeder(Barut,1996).Thephysicalpropertiesoftheseedsweredeterminedbythefollowingmethods:Linear dimensions, , thickness andwidth weremeasured (Mohsenin,1970):-5-(1)where:Listhelength;Wisthewidth;(CH8)7wasusedratherthanwaterbecauseitwasnotabsorbedbyfruits(Mohsenin,1970;?g?t,1998).Projectedareawasdeterminedbyusingadigitalcamera(KodakDC5000),inrelationtokerneldensity,projectedarea,housandkernelmass,-square,-square2Ermsχ,rootmeansquareerrorandmodellingefficiency Emwerecalculatedasfollows:(2)(3)(4)where:kexpistheexperimentalvacuumpressureinkPa; kexp,meanisthemeanvalueofexperimentalvacuumpressureinkPa;kpreisthepredictedvacuumpressureinkPa;Nisthenumberofobservations;-squareisthemeansquareofthedeviationsbetweentheexperimentalandcalculatedvaluesforthemodelsand,-square, efficiency alsoshowstheability ofthemodelanditshighestvalueis1( Yaldizetal.,2001;Ertekin&Yaldiz,2004 ).pleteblock( Neteretal.,1990) 'smultiple-rangetestswereusedtoidentifysignificantlydifferentmeanswithindependentvariables.-6- pressureonsowinguniformity ofthevacuumseederwasanalysedrelatingtothemultipleindex,missindex, index,missindexandquality bined Table2,,cottonandsoyabeanseedsfordifferentvacuumpressureNote:Meanswithinagroupfollowedbysameletterarenotsignificantlydifferentatprobabilityp=0·05,byDuncan',melonandcucumberseedsfordifferentvacuumpressure-7-Note:Meanswithinagroupfollowedbysameletterarenotsignificantlydifferentatprobabilityp=0·05,byDuncan':Meanswithinagroupfollowedbysameletterarenotsignificantlydifferentatprobabilityp=,byDuncan'smultiplerangetest.-8- Table2,Table3andTable4,thehighestseedspacinguniformities(qualityoffeedindex);,soyabeanandwatermelonI;,melonandcucumber;,,melon,cucumber,‘skipsor’ur