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The co-evolutionary dynamics of a cyclic game system is investigated in a two-dimensional square lattice with the asymmetrical rates for three species. Different with the well-mixed system, coexistence and extinction emerge alternately in the system, where a "zero-one" behavior is robust for a small population size, whereas, the system is predominated by coexistence for a big population one. We study in detail the influence about the fluctuation to the change of the state, and find that the difference between the maximal amplitude about the fluctuation and the average intensity determines which state the system is ultimately. In addition, we introduce Ports energy to explain the reason of the "zero-one" behavior. It is shown that the average Ports energy per site is the distance to the "zero-one" behavior in the model. 相似文献
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李永明 《数学年刊A辑(中文版)》2006,(2)
本文在 NA 样本下,讨论了平均剩余寿命函数和有效函数的非参数递归型估计的相合性和渐近正态性. 相似文献
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给出伪加权序列机、伪加权Mealy机以及伪加权Moore机的定义并分别给出了它们的响应函数.证明伪加权序列机与伪加权Mealy机是不等价的、伪加权序列机与伪加权Moore机是等价的;并以伪加权序列机为桥梁,得到了伪加权Mealy机与伪加权Moore机的关系是不等价的. 相似文献
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设{ε_i:-∞i∞}是同分布正相协随机变量序列,{a_i:-∞i+∞}是绝对可和的常数列.在一定的条件下得到了移动平均过程(?)的矩完全收敛的精确渐近性.把有关负相协条件下的结果推广到正相协情形. 相似文献
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In this paper we propose a novel and efficient quantum secret sharing protocol using d-level single particle,which it can realize a general access structure via the thought of concatenation. In addition, Our scheme includes all advantages of Tavakoli's scheme [Phys. Rev. A 92 (2015) 030302(R)]. In contrast to Tavakoli's scheme, the efficiency of our scheme is 1 for the same situation, and the access structure is more general and has advantages in practical significance. Furthermore, we also analyze the security of our scheme in the primary quantum attacks. 相似文献
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Quantale与互模拟的进程语义 总被引:9,自引:1,他引:8
以特定的观察为生成元构造了互模拟quantaleQ_B,而将进程作为此quantale上的模的组成成分,由此给出了互模拟的三个完备性准则,回答了AbrasmkyS与VickersS.提出的公开问题(1993),完备了他们利用quantale统一处理进程语义的方法. 相似文献
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“中学化学疑难实验研究”是对化学系高年级学生开设的一门必修课,其目的是使学生在已有的教育学科和化学专业知识的基础上,结合中学化学教学法,针对中学化学教材中较为疑难的实验,从药品、仪器、实验装置、实验条件、实验结果等方面对疑难实验进行研究和改进。该课程题材新颖,方法灵活,有利于培养学生的思维能力和独立工作能力.有利于为他们将来从事中学化学教学和化学研究奠定一定的基础。该课程对全日制学生开设30学时,约10周时间。主要步骤是:给定实验研究题目;查阅资料;设计实验方案;通过实验验证方案的可行性;再进一步收… 相似文献