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With the rapid development of various types of space applications, space information network faces more and more challenges about the quality of service. How to provide end-to-end QoS based on the limited resources of space information network becomes one of the research focuses. In this paper, a method of dynamic deprivable bandwidth allocation (DDBA) is proposed for delay-sensitive specific applications...
The invasive plant species have large impact on the distribution of native plants and how to control these invasive plant species is a world-wide problem. The mechanism of the spread of the invasive plant species is of fundamental importance to solve this problem. The Logistic spread of these invasive plant species is discussed and factual experimental data is given to examine the mathematical model.
A discrete-time competitive system with two species, multi-delays and fluctuating environment is considered. New sufficient conditions to guarantee the permanence of the ecosystem are obtained. An example is given to show that the results obtained in this paper are necessary complements to those related with this biomathematical model.
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