简介：Accordingtothepreciseephemerishasonlyprovidedsatellitepositionthatisdiscretenotanytime,soproposethatmakeuseofinterpolationmethodtocalculatesatellitepositionatanytime.TheessaytakeadvantageofIGSpreciseephemerisdatatocalculatesatellitepositionatsometimebyusingLagrangeinterpolation,Newtoninterpolation,Hermiteinterpolation,Cubicsplineinterpolationmethod,Chebyshevfittingmethodrespectively,whichhasadeeplyanalysisintheprecisionoffiveinterpolations.TheresultsshowthattheprecisionofCubicsplineinterpolationmethodistheworst,theprecisionofChebyshevfittingisbetterthanHermiteinterpolationmethod.LagrangeinterpolationandNewtoninterpolationarebetterthanothermethodsinprecision.Newtoninterpolationmethodhastheadvantagesofhighspeedandhighprecision.Therefore,Newtoninterpolationmethodhasacertainscientificsignificanceandpracticalvaluetogetthepositionofthesatellitequicklyandaccurately.

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简介：Onthebasisofanalyzingtheflawsofpresentsomemultipleattributesclassificationdecision-makingmethods，tothequestionofcharacteristicsofthemultipleat-tributesclassificationdecision-makingandparticularemphasisofrespectiveattributesinthedecision-makingprocess，aswellasitsrelevancetothedecisionmakingenvironment，thepaperfirstlyformulatesanoptimalattributessystem，thenusestheMultiplicativeAnalyticHierarchyProcess(MAHP)todeterminesubjectiveweightcoefficients，estimatetheobjectiveweightcoefficients，establishestheoptimalmodeloftheweightcoefficientsofthewholeoptimalattributessystem，andobtaintheweightsonattributes．Furthermore，thepaperpresentsadecision-makingmethodandgivesitsdetailimplementationprocedure．Finally，anexampleisgiventoshowthefeasibilityandeffectivenessofthismethod．

简介：TheE-supplychainisformedgraduallyalongwiththedevelopmentofnetwork,whichisgettingmoreattentionamongenterpriseswithuniqueadvantages.ThreeE-supplychainoperationmodesareconstructedinthispaper,thentheoptimalpricingandadvertisingstrategiesunderthosemodesarestudiedandcompared,whicharedemonstratedwithnumericalexamples.Theresultsofcomparisonandanalysisshowthat:Sellingprice,networkplatformservicelevel,advertisinginvestmentandtheprofitsofmanufacturer,networkplatformandE-supplychainallincreasewithadvertisingeffectivenessofstimulatingdemandgrowth.Undercentralizeddecision-makingmode,servicelevelishighest,advertisinginvestmentislargestandtheprofitofE-supplychainishighestaswell.Whenmanufacturerleadsdecentralizeddecision-makingmode,notonlynetworkservicelevel,advertisinginvestmentandtheprofitofmanufacturercangainbetterresults,butalsoprofitofnetworkplatformcanbehigherwhiletheadvertisementeffectofincreasingdemandisbigenough.Additionally,itisconfirmedthatcentralizeddecision-makingisbetterthandecentralizeddecision-makingforsystemoperation.Besides,decentralizeddecision-makingmodeledbymanufacturerissuperiortoitledbynetworkplatformontheconditionthatadvertisementeffectisobvious.

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简介：BybuildingupanAIDSmodelofChineseruralresidents,classifiedintofivegroupsbyincome,concludingsixcommodities(services),analysesthediversityofconsumptionbehavioroutofincomedifference.Wedrawthefollowingconclusions:Firstly,thereexistssomedifferencebetweendifferentincomegroupsincommodities(services)consumption.Secondly,increaseoffarmers'incomewillbefavorabletotheenhancementofconsumptionlevelandupgradingofconsumptionstructure.Thirdly,themediumincomegroup,asonespecialmass,featuresatransitionalmainbodyofconsumptionstructure.Finally,thepolicymakersshouldsupportthefarmerswithlowerincomeincompulsoryeducation,suchasmoreandnecessarytransferpayments.

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