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Universal role of migration in the evolution of cooperation

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Chinese Science Bulletin 2011年第34期56卷 3693-3696页

作者： YANG HanXin wang binghong Department of Modern Physics University of Science and Technology of China Hefei 230026 China Research Center for Complex System Science University of Shanghai for Science and Technology and Shanghai Academy of System Science Shanghai 200093 China

We study the role of unbiased migration in cooperation in the framework of the spatial evolutionary game on a variety of spatial structures, namely a regular lattice, continuous plane and complex networks. A striking finding is that migration plays a universal role in cooperation, regardless of the spatial structure. For a high degree of migration, cooperators cannot survive owing to their failure to form cooperator clusters that resist attacks by defectors. Meanwhile, for a low degree of migration, cooperation is considerably enhanced relative to that in the static spatial game, which is due to the strengthening of the boundaries of cooperator clusters by the occasional accumulation of cooperators along the boundaries. The cooperator cluster thus becomes more robust than that in the static game and defectors near the boundary can be assimilated by cooperators. The cooperator cluster thus expands, which facilitates cooperation. The general role of migration will be substantiated by sufficient simulations relating to heuristic explanations.

关键词：迁移合作通用进化空间结构演化博弈网络空间静态空间

Influences of finite-size effects on the self-organized critical-ity of forest-fire model

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Chinese Science Bulletin 2002年第3期47卷 177-180页

作者： Weiguo Song Weicheng Fan binghong wang Univ Sci & Technol China State Key Lab Fire Sci Hefei 230026 Peoples R China

The influences of finite-size effects on the self-organized criticality (SOC) of the traditional forest-fire model are investigated by means of a new method. The forest size is originally set to a value much greater than the correla-tion length of the forest. Finite-size effects are then studied by equally dividing the forest into more and more separate subsystems on condition that the forest size, igniting prob-ability and planting probability are invariant. A new phe-nomenon, i.e. the finite-size effects with one-side frequency peak, is observed. The boundary between two neighboring subsystems can be regarded as a firebreak. The concept of ’separation ability’ is introduced to represent the probability for the firebreak to block off the fire successfully. Restrain-ing effects of separation ability on finite-size effects are ana-lyzed. Finite-size effects and separation ability, as well as their relations are found to have practical importance to the actual forest-fire protection.

关键词： forest-fire model self-organized criticality cellular automata finite-size effects.

Self-organized criticality of forest fires in China

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Chinese Science Bulletin 2001年第13期46卷 1134-1137页

作者： Song Weiguo Fan Weicheng wang binghong Univ Sci & Technol China State Key Lab Fire Sci Hefei 230026 Peoples R China

Self-organized criticality(SOC) of forest fires in China from 1950 to 1989 is studied. The stability, scale-invariant character of SOC and external effects on SOC of forest fires in China are analyzed in detail. Forest-fire cellular automata model is a typical model for the research of SOC. Based on the traditional forest-fire model, an improved model, in which effects of tree species, meteorological conditions and human efforts on forest fires are considered, is introduced. Actual forest fire data in China are compared with simulation results of the two models. It is shown that forest fire data in China have SOC behavior and simulation results of the improved model accord better with actual forest fire data than those of the traditional model.

关键词： self-organized criticality cellular automata forest-fire model fire science.

Financial market model based on self-organized percolation

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Chinese Science Bulletin 2005年第19期50卷 2140-2144页

作者： YANG Chunxia wang Jie ZHOU Tao LIU Jun XU Min ZHOU Peiling wang binghong Department of Electronic Science and Technology University of Science and Technology of China Hefei 230026 China Department of Modem Physics University of Science and Technology of China Hefei 230026 China Graduate Program of Bioengineering National University of Singapore Singapore

Starting with the self-organized evolution of the trader group’s structure, a parsimonious percolation model for stock market is established, which can be considered as a kind of betterment of the Cont-Bouchaud model. The return distribution of the present model obeys Lévy form in the center and displays fat-tail property, in accord with the styl-ized facts observed in real-life financial time series. Fur-thermore, this model reveals the power-law relationship be-tween the peak value of the probability distribution and the time scales, in agreement with the empirical studies on the Hang Seng Index.

关键词：金融市场模型自组织过滤 Lévy分布行业组织概率分布

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多重网络的结构与鲁棒性

复杂系统与复杂性科学 2015年第2期12卷 32-37,59页

作者：李明汪秉宏中国科学技术大学近代物理系合肥230026

网络常被用来刻画个体间的组合与作用方式。但是,真实系统中的组合与相互作用方式往往并不单一,而是多种混杂。为了更为准确地描述这种实际情况,多重网络的概念被提了出来。一般来说,多重网络中会有多种连边,不同种类的连边属于系统的... 详细信息

网络常被用来刻画个体间的组合与作用方式。但是,真实系统中的组合与相互作用方式往往并不单一,而是多种混杂。为了更为准确地描述这种实际情况,多重网络的概念被提了出来。一般来说,多重网络中会有多种连边,不同种类的连边属于系统的不同层次,用以描述系统中元素在不同层次的相互作用。这个概念的引入丰富了复杂网络与复杂系统的研究。介绍多重网络的基本概念,并对其鲁棒性进行一个简明的计算与讨论。

关键词：多重网络结构鲁棒性逾渗

Epidemic dynamics on complex networks

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Progress in Natural Science:Materials International 2006年第5期16卷 452-457页

作者： ZHOU Tao , FU Zhongqian, and wang binghong (Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230026, China Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China) Department of Electronic Science and Technology University of Science and Technology of China Hefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China

Recently, motivated by the pioneer work in revealing the small-world effect and scale-free property of various real-life networks, many scientists devote themselves to studying complex networks. One of the ultimate goals is to understand how the topological structures affect the dynamics upon networks. In this paper, we give a brief review on the studies of epidemic dynamics on complex networks, including the description of classical epidemic models, the epidemic spread on small-world and scale-free networks, and network immunization. Finally, perspectives and some interesting problems are proposed.

关键词： epidemic dynamics complex networks critical value immunization small-world effect scale-free property.

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复杂系统理论在社会治理中的应用综述

电子科技大学学报 2024年第3期53卷 462-472页

作者：田逢时疏学明汪秉宏中国人民警察大学智慧警务学院廊坊065000 清华大学安全科学学院北京100084 中国科学技术大学近代物理系合肥230026

经济持续发展和社会不断进步对社会治理现代化提出了新的要求。社会是一个典型的复杂系统,社会治理研究迫切需要从复杂系统的角度,依靠多学科的交叉融合,从整体上加以解决。该文选取复杂系统相关研究方法,对社会治理中疫情防控、谣言管... 详细信息

经济持续发展和社会不断进步对社会治理现代化提出了新的要求。社会是一个典型的复杂系统,社会治理研究迫切需要从复杂系统的角度,依靠多学科的交叉融合,从整体上加以解决。该文选取复杂系统相关研究方法,对社会治理中疫情防控、谣言管控、智慧交通和智慧消防4个典型场景进行了重点分析,总结了复杂系统理论在社会治理领域应用中存在的问题,对下一步主要发展的方向进行了展望。

关键词：复杂系统社会治理谣言管控智慧交通智慧消防

对现行装配式混凝土建筑规范标准的几点思考及建议

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建筑结构 2020年第S1期50卷 549-553页

作者：王炳洪上海联创设计集团股份有限公司上海200092

对现行装配式混凝土建筑规范标准提出了几点思考,包括:叠合板底纵筋伸入支座锚固的规定,现浇竖向构件内力放大规定,多层装配式剪力墙结构位移角限值规定等。提出了规范标准宜强调和加强的建议,包括:干法连接的研究应用,外围护系统一体... 详细信息

对现行装配式混凝土建筑规范标准提出了几点思考,包括:叠合板底纵筋伸入支座锚固的规定,现浇竖向构件内力放大规定,多层装配式剪力墙结构位移角限值规定等。提出了规范标准宜强调和加强的建议,包括:干法连接的研究应用,外围护系统一体化预制装配的应用,低、多层装配式混凝土结构设计要求宜加强区分等。

关键词：装配式结构叠合板不出筋竖向构件内力放大装配式结构位移角干法连接管线分离外围护系统一体化预制

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多层网络上的逾渗相变

科技导报 2017年第14期35卷 50-55页

作者：李明汪秉宏中国科学技术大学工程科学学院合肥230026 中国科学技术大学近代物理系合肥230026

逾渗模型的机制虽然简单,但是它涉及到统计物理与非线性物理中的众多理论与问题,在一些网络化的自然、技术与社会系统中,逾渗模型都得到成功应用。近年来,为了刻画更为复杂的相互作用系统,多层网络的概念被提出。而相应系统上的逾渗问... 详细信息

逾渗模型的机制虽然简单,但是它涉及到统计物理与非线性物理中的众多理论与问题,在一些网络化的自然、技术与社会系统中,逾渗模型都得到成功应用。近年来,为了刻画更为复杂的相互作用系统,多层网络的概念被提出。而相应系统上的逾渗问题研究,也进一步引起研究人员关注。在这些研究中,逾渗模型不但成功解决了一些现实问题,其本身也展现出一些新现象,例如不连续相变。本文介绍了多层网络上逾渗模型的基本机制及相关连通性的度量,讨论了其中不连续相变的涌现与系统维度的关系,并对相关理论解析方法做简单介绍。

关键词：逾渗复杂网络相变