色交叉关联噪声作用下集合种群的稳定性和平均灭绝时间*OA北大核心CSCDCSTPCD
The mean extinction time and stability for a metapopulation system driven by colored cross-correlated noises∗
在Levins模型的基础上研究了色交叉关联噪声对集合种群稳定性的影响,应用Fokker-Plank方程得到了系统的稳态概率密度函数,运用最快下降法得到了平均灭绝时间的解析式。结果表明:两噪声色关联时,加性噪声强度和乘性噪声强度均弱化集合种群的稳定性;噪声关联强度强化集合种群的稳定性。两噪声之间负关联时,平均灭绝时间是加性噪声强度和乘性噪声强度的减函数,是噪声关联时间的增函数;两噪声之间正关联时,平均灭绝时间是加性噪声强度和噪声关联时间乘性噪声…查看全部>>
In this paper, the stability for a metapopulation system driven by colored cross-correlated noises is investigated based on the Levins model. The stationary probability distribution and the explicit expression of the mean extinction time are derived according to the Fokker-Planck equation. Numerical results show that in the case of colored correlation between two noises, the addictive noise and the multiplicative noise intensity weaken the stability of met…查看全部>>
王康康;刘先斌†;杨建华
南京航空航天大学,机械结构力学与控制国家重点实验室,南京 210016 江苏科技大学数理学院,镇江 212003南京航空航天大学,机械结构力学与控制国家重点实验室,南京 210016
集合种群色交叉关联噪声稳定性平均灭绝时间
metapopulationcolored cross-correlated noisesstabilitymean extinction time
《物理学报》 2013 (10)
52-58,7
国家自然科学基金(批准号:11072107,91016022,11232007)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant Nos.11072107,91016022,11232007)
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