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This paper considers a kind of nonautonomous system of two species predator-prey system with double density restrict and stage-structure for prey. The sufficient conditions are obtained for guaranteeing the permanence of the system by Laypunov method. Then the existence and uniqueness of the positive almost periodic solutions for almost periodic systems are also discussed. Some new results obtained.
Aims at the issue of passenger turnover structure, based on Markov theory building the multi-product alternative forecast model, obtained the future passenger turnover structure under the stable state trend of transportation development. In practice this method has the strong feasibility, through the prediction of the passenger turnover this thesis could provide a viable research ideas for the harmonious...
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