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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

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

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

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

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

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

Ferroelectric artificial synapse for neuromorphic computing and flexible applications

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Fundamental Research 2023年第6期3卷 960-966页

作者： qing-Xuan Li Yi-lun Liu Yuan-Yuan Cao tian-Yu Wang Hao Zhu Li Ji Wen-Jun Liu qing-qing Sun David Wei zhang Lin chen State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China National Integrated Circuit Innovation Center No.825 Zhangheng RoadShanghai 201203China

Research of artificial synapses is increasing in popularity with the development of bioelectronics and the appearance of wearable *** the high-temperature treatment process of inorganic materials is not compatible with flexible substrates,organic ferroelectric materials that are easier to process have emerged as *** organic synaptic device based on P(VDF-TrFE)was prepared in this *** device showed reliable P/E endurance over 104 cycles and a data storage retention capability at 80℃ over 104 ***,it possessed excellent synaptic functions,including short-term/long-term synaptic plasticity and spike-timing-dependent *** addition,the ferroelectric performance of the device remained stable even under bending(7 mm bending radius)or after 500 bending *** work shows that low-temperature processed organic ferroelectric materials can provide new ideas for the future development of wearable electronics and flexible artificial synapses.

关键词： Organic artificial synapse Neuromorphic computing Synaptic devices Wearable electronics Ferroelectric

Stratified Platelet-to-lymphocyte Ratio:A Novel Target for Prognostic Prediction of Hepatocellular Carcinoma after Curative Liver Resection

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Journal of Clinical and Translational Hepatology 2017年第1期5卷 35-42页

作者： gui-Qian Huang Ji-Na Zheng tian-tian Zou Yi-Ran chen Ke-qing Shi Sven Van Poucke zhang cheng Lu-Yi Ruan Ming-Hua Zheng Department of Hepatology Liver Research CenterThe First Affiliated Hospital of Wenzhou Medical UniversityWenzhouChina Renji School of Wenzhou Medical University WenzhouChina School of The First Clinical Medical Sciences Wenzhou Medical UniversityWenzhouChina School of The Second Clinical Medical Sciences Wenzhou Medical UniversityWenzhouChina Institute of Hepatology Wenzhou Medical UniversityWenzhouChina Department of Anesthesiology Intensive CareEmergency Medicine and Pain TherapyZiekenhuis Oost-LimburgGenkBelgium

Background and Aims:Platelet-to-lymphocyte ratio(PLR)has been shown to predict prognosis of *** aimed to evaluate the prognostic value of stratification of PLR in patients after curative liver resection(CLR)for hepatocellular carcinoma(HCC).Methods:A total of 1804 patients who underwent CLR for suspected HCC between January 2007 and January 2014 were screened for the *** of the patients were categorized into equal tertiles according to the number of patients and the distribution of *** significance was determined for overall survival(OS)and was assessed using Kaplan-Meier *** and multi-variate Cox proportional hazard regression analyses were evaluated for association of all independent parameters with disease ***:The optimal cut-off points of preoperative PLR were:(T1)11.98-75.00,(T2)75.00-113.33 and(T3)*** were obvious differences in each PLR tertile with mortality within 36 months of CLR(Plog-rank<0.001).Multivariable analysis suggested that the level of PLR(HR=1.004,95%CI:1.001-1.008,P=0.006),portal vein thrombosis(HR=3.406,95%CI:1.185-9.794,P=0.023),number of nodules(HR=1.810,95%CI:1.345-2.437,P<0.001),Child-Turcotte-Pugh score(HR=1.741,95%CI:1.129-2.684,P=0.012)and microvascular invasion(HR=2.730,95%CI:1.777-4.196,P<0.001)were significant predictors of ***-Meier analysis of overall survival(OS)demonstrated that each PLR tertile showed a progressively worse OS and apparent separation(Plog-rank=0.016).The highest 5-year OS rate following CLR(58%)was revealed in tertile *** contrast,the lowest 5-year OS rate(30%)was revealed in tertile ***:Stratified preoperative PLR could strengthen the predictive power for OS in HCC patients with CLR.

关键词： Platelet-to-lymphocyte ratio Hepatocellular carcinoma Curative liver resection Overall survival