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AMSSubjectClassification34C27Thespatialelementinpopulationbiologyisimportanttounderstandthedynamicsofecologicalsystems.ThetheoreticalworksonthisproblemwerepioneeredbySkellamif]in1951andwerereviewedbyLevin[2]in1974.In12],Levinfirstestablishedthiskindofmode… 相似文献
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两种群非自治Lotka-Volterra竞争扩散系统的概周期解 总被引：6，自引：0，他引：6
本文讨论两种群概周期竞争扩散系统，利用微分不等式，证明了系统概周期解的存在、唯一性及其在壳扰动下的稳定性． 相似文献
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本文讨论了有放养的时滞Michaelis Menten型功能性反应的捕食链 .应用微分不等式和V函数法 ,在一定条件下讨论了该系统的一致持久性 ,得到了概周期解的存在唯一性及其全局吸引性 . 相似文献
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1IntroductionRecent1ytheso-calledsinglespeciesm0delwasconsidered,andmanyrcsultshavebeen.bt.in.d[1-7J.In[l],thesinglespeciesmodelwithstage-structtlredinthefOrmofisstudied,whereIi(t)andx.(t)representtheimmatureandmaturepopu-lati0nsdensitiesrespectively;ofisthe0bservedorassumedbirthrateofxi(t)attimet(-T5t5O),andTrepresentsac0nstanttime1engthfortheiITl-maturetobecomematurity.aisthebirthrateofmaturepopulation.7isthedeathrateofimmaturepopulationandfiistheLogisticconstantofthemature.Somesufficien… 相似文献
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ＡＬＭＯＳＴＰＥＲＩＯＤＩＣＳＯＬＵＴＩＯＮＯＦＴＷＯ－ＳＰＥＣＩＥＳＰＡＴＣＨＴＹＰＥＮＯＮＡＵＴＯＮＯＭＯＵＳＤＩＦＦＵＳＩＶＥＬＯＴＫＡ－ＶＯＬＴＥＲＲＡＣＯＭＰＥＴＩＴＩＶＥ ＭＯＤＥＬＳＬｕｏＧｕｉｌｉｅ（罗桂烈），ＬｉａｏＭｉｎｌｉ（廖民... 相似文献
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The uniform persistence is proved for a non-autonomous competitive and prey-predator model with ratio-dependent functional response and stage-structure. By constructing a Liapunov functional, we establish the conditions of existence and uniqueness for the positive periodic solution, which is globally asymptotically stable. We get a unique almost periodic solution for an almost periodic system as well under corresponding conditions .by means of the Razumikhin function method. 相似文献
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