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Effects of Aging and Self-organized Criticality in a Pulse-Coupled Integrate-and-Fire Neuron Model Based on Small World Networks

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Communications in Theoretical Physics 2007年第5期47卷 869-874页

作者： zhang gui-qing zhang Ying-Yue CHEN Tian-Lun Department of Physics Nankai University Tianjin 300071 China

Effects of aging and self-organized criticality in a pulse-coupled integrate-and-fire neuron model based on small world networks have been studied. We give the degree distribution of aging network, average shortest path length, the diameter of our network, and the clustering coefficient, and find that our neuron model displays the power-law behavior, and with the number of added links increasing, the effects of aging become smaller and smaller. This shows that if the brain works at the self-organized criticality state, it can relieve some effects caused by aging.

关键词： aging self-organized criticality small world networks

A Mixed Mechanism of Weighted-Driven and Inner Selection in Networks

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Communications in Theoretical Physics 2009年第5期51卷 947-953页

作者： zhang gui-qing WANG Lin CHEN Tian-Lun Department of Physics Nankai University Tianjin 300071 China

For most networks, the weight of connection is changing with their attachment and inner affinity. By introducing a mixed mechanism of weighted-driven and inner selection, the model exhibits wide range power-law distributions of node strength and edge weight, and the exponent can be adjusted by not only the parameter δ but also the probability q. Furthermore, we investigate the weighted average shortest distance, clustering coefficient, and the correlation of our network. In addition, the weighted assortativity coefficient which characterizes important information of weighted topological networks has been discussed, but the variation of coefficients is much smaller than the former researches.

关键词： complex network evolving weighted network clustering coefficient weighted assortativity coefficient correlation

Effects of Different Connectivity Topologies in Small World Networks on EEG-Like Activities

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Communications in Theoretical Physics 2006年第2期45卷 373-378页

作者： LIN Min zhang gui-qing CHEN Tian-Lun Department of Physics Nankai University Tianjin 300071 China

Based on our previously pulse-coupled integrate-and-fire neuron model in small world networks, we investigate the effects of different connectivity topologies on complex behavior of electroencephalographic-like signals produced by this model. We show that several times series analysis methods that are often used for analyzing complex behavior of electroencephalographic-like signals, such as reconstruction of the phase space, correlation dimension, fractal dimension, and the Hurst exponent within the rescaled range analysis （R/S）. We lind that the different connectivity topologies lead to different dynamical behaviors in models of integrate-and-fire neurons.

关键词： correlation dimension Hurst exponent small world networks

Effects of Vertex Activity and Self-organized Criticality Behavior on a Weighted Evolving Network

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Communications in Theoretical Physics 2008年第8期50卷 421-424页

作者： zhang gui-qing YANG Qiu-Ying CHEN Tian-Lun Department of Physics Nankai University Tianjin 300071 China

Effects of vertex activity have been analyzed on a weighted evolving *** network is characterized by the probability distribution of vertex strength,each edge weight and evolution of the strength of vertices with different vertex *** model exhibits self-organized criticality *** probability distribution of avalanche size for different network sizes is also *** addition,there is a power law relation between the size and the duration of an avalanche and the average of avalanche size has been studied for different vertex activities.

关键词： weighted evolving network vertex activity power-law self-organized criticality

Nonlinear Dynamical Behavior in Neuron Model Based on Small World Network with Attack and Repair Strategy

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Communications in Theoretical Physics 2008年第4期49卷 965-970页

作者： YANG Qiu-Ying zhang Ying-Yue zhang gui-qing CHEN Tian-Lun Department of Physics Nankai University Tianjin 300071 China

In this paper, we investigate the effect due to the change of topology structure of network on the nonlinear dynamical behavior, by virtue of the OFC neuron evolution model with attack and repair strategy based on the small world. In particular, roles of various parameters relating to the dynamical behavior are carefully studied and analyzed. In addition, the avalanche and EEC-like wave activities with attack and repair strategy are also explored in detail in this work.

关键词： attack repair self-organized criticality small world network

Study on Removing Zinc from Nickel Electrolyte by Ion-exchange

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Journal of Central South University 2000年第4期12卷 194-197页

作者： zhang gui-qing zhang Qi-xiu XIAO Lian-sheng GONG Bo-fan Metallurgical Separation Science and Engineering Lab. Central South UniversityChangsha 410083China

In the process of nickel production by diaphragm electrolysis, the quality of the product has been tremendously affected by the content of zinc in the nickel electrolyte. Removing zinc from nickel electrolyte by ion-exchange is studied in the paper. Resin D201 is selected as the resin for zinc removing. Effects of the operative parameters, such as temperature, pH value and the contact time on zinc adsorption are observed and the desorption feature of the zinc-loaded resin is inspected. The results show that macroporous anion-exchange resin D201 has excellent adsorption and desorption properties. Its breakthrough capacity and saturation capacity in zinc adsorption reach 0.81 g/L of zinc and 1.16 g/L of zinc respectively, when the operative temperature is 60 °C and the contact time is only 5 min. In addition, compared with gel type IER 201 × 7 used industrially nowadays, this resin has better wearability and greater intensity.

关键词： zinc removal nickel electrolyte ion-exchange

Modeling Topology and Nonlinear Dynamical Behavior of the Weighted Scale-Free Networks

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Communications in Theoretical Physics 2008年第7期50卷 120-124页

作者： YANG Qiu-Ying zhang gui-qing zhang Ying-Yue CHEN Tian-Lun Department of Physics Nankai University Tianjin 300071 China

An improved weighted scale-free network, which has two evolution mechanisms： topological growth and strength dynamics, has been introduced. The topology structure of the model will be explored in details in this work. The evolution driven mechanism of Olami-Feder Christensen （OFC） model is added to our model to study the self-organlzed criticality and the dynamical behavior. We *** attack mechanism and the study of the model with attack is also investigated in this paper. We tlnd there are differences between the model with attack and without attack.

关键词： weighted scale-free network attack self-organized criticality

Self-organized Critical Model Based on Complex Brain Networks with Hierarchical Organization

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Communications in Theoretical Physics 2008年第9期50卷 681-684页

作者： zhang Ying-Yue zhang gui-qing YANG Qiu-Ying CHEN Tian-Lun Department of Physics Nankai University Tianjin 300071 China

The dynamical behavior in the cortical brain network of macaque is studied by modelling each cortical areawith a subnetwork of interacting excitable *** find that the avalanche of our model on different levels *** the... 详细信息

关键词： self-organized criticality hierarchical organization power-law cortical network refractory-period

Study on Removal of Trace Lead from Nickel Sulphate Solution by Ion-exchange Method

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Journal of Central South University 2000年第4期12卷 191-193页

作者： XIAO Lian-sheng zhang gui-qing zhang Qi-xiu GONG Bo-fan MA Jing-xia LI Ji-zhong Zhu Rui-lun Metallurgical Separation Science and Engineering Lab. Central South UniversityChangsha 410083China Jinchuan Non-ferrousMetals Company Jinchuan737104China

By comparing the adsorption capacity of several kinds of resins, D363 resin is regarded as the most suitable one for removing lead from nickel sulphate electrolyte. The effects of pH, temperature and contact time on exchange adsorption during removing trace lead from industrial nickel sulphate solution with D363 large pore weak alkali anion exchange resin are discussed. Optimum conditions of adsorption of lead from nickel electrolyte by D363 resin are at room temperature, pH 1 2, contact time 30 min.

关键词： ion-exchange nickel sulphate lead