30778.生育模式對(duì)種群演化的影響_第1頁(yè)
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1、大連理工大學(xué)碩士學(xué)位論文生育模式對(duì)種群演化的影響姓名：馮愛(ài)燕申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用數(shù)學(xué)指導(dǎo)教師：賀明峰20090601生育模式對(duì)種群演化的影響PopulationEvolution、7IritllFertilityModeAbstractPennamodelisasimulationmodelofpopulationevolutionbasedonthe0，lstring，andhasthepopulationwhichhasag

2、estructureastheresearchsubjectInadditiontotheagestructure，themodelbutalsotakesintoaccounttheenvironmentgeneticvariationreproductiveage，populationlimitandotherfactors，andusescomputermethodstosimulatethedistributionandevol

3、utionofnaturalpopulations111efirstCharterofthisP印el“brieflyintroducesasexualPennamodelandsexualPennamodelInbothmodes，wesetspecificparameterstodiscussthedevelopmenttrendofpopulationsizeandthechangesSimulationcome：Afterace

4、rtainperiodoftime，thepopulationwilltendtosteadystatetodynamicbalanceanddrawthecomplexandcompellingresult，whichshowstherationalityofthePennamodelinrealityBasedontheabovementionedsexualPennamodel，thesecondchartofthisarticl

5、eaddstheconceptoffamily，establishthefamilyPennamodeltomakethepopulationreproducesoffspringinthefamilyformanddiscussesthedevelopmentandchangesofpopulationsizeandageratiointhismodeAsaresultofthefamilyformiswehumanreproduct

6、ivewayapplyingittotheissueofChina’SpopulationCanprovidemethodsforChinatoresearchPopulationdevelopmentBasedontheabovementionedfamilyPennamodeLthethirdchartsimulatestheimpactdifferentfertilitypolicythatisthemaxiinunlnumber

7、ofchildreninafamilyonpopulationsizeaverageageandageratioThroughsimulationWecome：thefewerthemaximumnumberofchildreninafamily，thesmallerthebalanceofthepopulationsize，thesmallertheyoungerratio，thebiggertheolderratio，themore

8、serioustheagingproblemAsChinasintegrationwiththeworldDINKfamilyisunderstoodandacceptedbysocietyandthepublic，DINKphenomenoninourcountryisincreasinglybecomingacommonphenomenonSothefourthchartofthisarticleaddsDINKfamilytoth

9、ePennamodelt0researchtheimpacttheDINKfamilyratioonpopulationsizeandageratioWecome：withtheDINKfamilyratiobecomesbiggerthepopulationsizereducesandtheagingproblembecomesserious硼1eemergenceofDINKfamilywillhaveasignificantimp

10、actonthedevelopmentofChinaspopulationandagestructure111efifthchartsimulatesthecombinedeffectsDINKfamilyandfertilitypolicyonpopulationitillustratesthattheadjustingtimeundertheircombinedeffectsisdifferentwiththeadjustingti

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