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一类随机时变种群扩散系统解的存在性、惟一性
引用本文:李朝霞,张启敏.一类随机时变种群扩散系统解的存在性、惟一性[J].山东大学学报(理学版),2007,42(9):107-113.
作者姓名:李朝霞  张启敏
作者单位:宁夏大学,数学计算机学院,宁夏,银川,750021
基金项目:国家自然科学基金;宁夏自然科学基金
摘    要:在假设随机的外界环境对系统产生扰动的条件下,给出Hilbert空间中一类带扩散随机时变种群发展系统.利用Burkholder-Davis-Gundy不等式,Gronwall引理和Kolmogorov不等式,讨论了该系统解的存在性和惟一性,并通过例子对所得结论进行了说明.

关 键 词:随机种群系统  It公式  Burkholder-Davis-Gundy不等式
文章编号:1671-9352(2007)09-0107-07
修稿时间:2006-12-12

Existence and uniqueness of solutions to stochastic age-dependent population system with diffusion
LI Zhao-xia,ZHANG Qi-min.Existence and uniqueness of solutions to stochastic age-dependent population system with diffusion[J].Journal of Shandong University,2007,42(9):107-113.
Authors:LI Zhao-xia  ZHANG Qi-min
Institution:School of Mathematics and Computer, Ningxia University, Yinchuan 750021, Ningxia, China
Abstract:For a population dynamics system, the influences of the stochastic external environment upon the system are not considered in ordinary age-dependent system models. When the system is perturbed by a random external environment, a class of stochastic age-dependent population dynanlics system with diffusion was proposed. The existence and uniqueness of solution to a stochastic age-dependent population dynamics system with diffusion were discussed in Hilbert space by using the Burkholder-Davis- Gundy inequality, Gronwall lemma and Klmogrorov inequality. The result was illustrated by a specific example.
Keywords:stochastic population system  Ito formula  Burkholder-Davis-Gundy inequality
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