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1 Introduction Inecology ,apredator preyinteractionofbothpopu lationsinonedimensionisdescribedbythefollowingsystem[1] :ut(x ,t) =uxx uM (u ,v) ,vt(x ,t) =βvxx vN(u ,v) ,(1)whereβisapositiveconstant,uandvarethepreyandpredatordensitiesrespectively ,andthefunctionsMandNare… 相似文献
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