Advances in Complex Systems最新文献_第9页

Effects of Hidden Opinion manipulation in Microblogging Platforms 微博平台隐性舆论操纵效应研究

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-10-12 DOI: 10.1142/s0219525921500090

Giulia Braghini, F. Salvarani

引用次数: 0

Reaching to the Top: the Gender effect in Highly-Ranked academics in Computer Science 走向巅峰:计算机科学高排名学者的性别效应

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-10-01 DOI: 10.1142/s0219525921500089

A. M. Jaramillo, Mariana Macedo, R. Menezes

引用次数: 0

FORMAN–RICCI CURVATURE FOR HYPERGRAPHS 超图的Forman-ricci曲率

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-09-30 DOI: 10.1142/s021952592150003x

WILMER LEAL, GUILLERMO RESTREPO, PETER F. STADLER, JÜRGEN JOST

{"title":"FORMAN–RICCI CURVATURE FOR HYPERGRAPHS","authors":"WILMER LEAL, GUILLERMO RESTREPO, PETER F. STADLER, JÜRGEN JOST","doi":"10.1142/s021952592150003x","DOIUrl":"https://doi.org/10.1142/s021952592150003x","url":null,"abstract":"Hypergraphs serve as models of complex networks that capture more general structures than binary relations. For graphs, a wide array of statistics has been devised to gauge different aspects of their structures. Hypergraphs lack behind in this respect. The Forman–Ricci curvature is a statistics for graphs based on Riemannian geometry, which stresses the relational character of vertices in a network by focusing on the edges rather than on the vertices. Despite many successful applications of this measure to graphs, Forman–Ricci curvature has not been introduced for hypergraphs. Here, we define the Forman–Ricci curvature for directed and undirected hypergraphs such that the curvature for graphs is recovered as a special case. It quantifies the trade-off between hyperedge (arc) size and the degree of participation of hyperedge (arc) vertices in other hyperedges (arcs). Here, we determine upper and lower bounds for Forman–Ricci curvature both for hypergraphs in general and for graphs in particular. The measure is then applied to two large networks: the Wikipedia vote network and the metabolic network of the bacterium <italic>Escherichia coli</italic>. In the first case, the curvature is governed by the size of the hyperedges, while in the second example, it is dominated by the hyperedge degree. We found that the number of users involved in Wikipedia elections goes hand-in-hand with the participation of experienced users. The curvature values of the metabolic network allowed detecting redundant and bottle neck reactions. It is found that ADP phosphorylation is the metabolic bottle neck reaction but that the reverse reaction is not similarly central for the metabolism. Furthermore, we show the utility of the Forman–Ricci curvature for quantification of assortativity in hypergraphs and illustrate the idea by investigating three metabolic networks.","PeriodicalId":50871,"journal":{"name":"Advances in Complex Systems","volume":"325 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of controllable Leader-follower Networks via Memetic Algorithms 基于模因算法的可控领导-追随者网络设计

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-09-25 DOI: 10.1142/s0219525921500041

Shaoping Xiao, B. She, S. Mehta, Z. Kan

{"title":"Design of controllable Leader-follower Networks via Memetic Algorithms","authors":"Shaoping Xiao, B. She, S. Mehta, Z. Kan","doi":"10.1142/s0219525921500041","DOIUrl":"https://doi.org/10.1142/s0219525921500041","url":null,"abstract":"In many engineered and natural networked systems, there has been great interest in leader selection and/or edge assignment during the optimal design of controllable networks. In this paper, we present our pioneering work in leader–follower network design via memetic algorithms, which focuses on minimizing the number of leaders or the amount of control energy while ensuring network controllability. We consider three problems in this paper: (1) selecting the minimum number of leaders in a pre-defined network with guaranteed network controllability; (2) selecting the leaders in a pre-defined network with the minimum control energy; and (3) assigning edges (interactions) between nodes to form a controllable leader–follower network with the minimum control energy. The proposed framework can be applied in designing signed, unsigned, directed, or undirected networks. It should be noted that this work is the first to apply memetic algorithms in the design of controllable networks. We chose memetic algorithms because they have been shown to be more efficient and more effective than the standard genetic algorithms in solving some optimization problems. Our simulation results provide an additional demonstration of their efficiency and effectiveness.","PeriodicalId":50871,"journal":{"name":"Advances in Complex Systems","volume":"1 1","pages":"2150004:1-2150004:29"},"PeriodicalIF":0.4,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90666540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Scalable Single Length Cycle, Single Attractor Cellular Automata in Linear Time 线性时间下可伸缩单长周期、单吸引子元胞自动机的合成

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-09-15 DOI: 10.25088/complexsystems.30.3.415

B. Chakraborty, M. Dalui, B. Sikdar

引用次数: 0

What Keeps a Vibrant Population Together? 是什么让一个充满活力的人口聚集在一起?

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-09-15 DOI: 10.25088/complexsystems.30.3.347

Jayati Deshmukh, S. Srinivasa, Sridhar Mandyam

{"title":"What Keeps a Vibrant Population Together?","authors":"Jayati Deshmukh, S. Srinivasa, Sridhar Mandyam","doi":"10.25088/complexsystems.30.3.347","DOIUrl":"https://doi.org/10.25088/complexsystems.30.3.347","url":null,"abstract":"Managing diversity is a challenging problem for organizations and governments. Diversity in a population may be of two kinds—acquired and innate. The former refers to diversity acquired by pre-existing social or organizational environments, attracting employees or immigrants because of their wealth and opportunities. Innate diversity, on the other hand, refers to a collection of pre-existing communities having to interact with one another and to build an overarching social or organizational identity. While acquired diversity has a prior element of common identity, innate diversity needs to build a common identity from a number of disparate regional or local identities. Diversity in any large population may have different extents of acquired and innate elements. In this paper, innate and acquired diversity are modeled in terms of two factors, namely: insularity and homophily, respectively. Insularity is the tendency of agents to act cooperatively only with others from the same community, which is often the primary challenge of innate diversity; while homophily is the tendency of agents to prefer members from their own community to start new social or business connections, which is often the primary challenge in acquired diversity. The emergence of network structure is studied when insularity and homophily are varied. In order to promote cooperation in a diverse population, the role played by a subset of agents called “global” agents who are not affected by homophily and insularity considerations is also studied. Simulation results show several interesting emergent properties. While the global agents are shown to acquire high betweenness, they are by no means the wealthiest or the most powerful in the network. However, the presence of global agents is important for the regional agents whose own wealth prospects increase because of their interaction with global agents.","PeriodicalId":50871,"journal":{"name":"Advances in Complex Systems","volume":"37 1","pages":"347-373"},"PeriodicalIF":0.4,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80588174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Studies of COVID-19 Outbreak Control Using Agent-Based Modeling 基于agent建模的COVID-19疫情控制研究

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-09-15 DOI: 10.25088/complexsystems.30.3.297

Shaoping Xiao, Ruicheng Liu

{"title":"Studies of COVID-19 Outbreak Control Using Agent-Based Modeling","authors":"Shaoping Xiao, Ruicheng Liu","doi":"10.25088/complexsystems.30.3.297","DOIUrl":"https://doi.org/10.25088/complexsystems.30.3.297","url":null,"abstract":"An agent-based model was developed to study outbreaks and outbreak control for COVID-19, mainly in urban communities. Rules for people’s interactions and virus infectiousness were derived based on previous sociology studies and recently published data-driven analyses of COVID-19 epidemics. The calculated basic reproduction number of epidemics from the developed model coincided with reported values. There were three control measures considered in this paper: social distancing, self-quarantine and community quarantine. Each control measure was assessed individually at first. Later on, an artificial neural network was used to study the effects of different combinations of control measures. To help quantify the impacts of self-quarantine and community quarantine on outbreak control, both were scaled respectively. The results showed that self-quarantine was more effective than the others, but any individual control measure was ineffective in controlling outbreaks in urban communities. The results also showed that a high level of self-quarantine and general community quarantine, assisted with social distancing, would be recommended for outbreak control.","PeriodicalId":50871,"journal":{"name":"Advances in Complex Systems","volume":"106 1","pages":"297-321"},"PeriodicalIF":0.4,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79860914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Control Approach to Guide Nonpharmaceutical Interventions in the Treatment of COVID-19 Disease Using a SEIHRD Dynamical Model 基于SEIHRD动态模型指导COVID-19疾病非药物干预治疗的控制方法

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-09-15 DOI: 10.25088/complexsystems.30.3.323

F. Pazos, F. Felicioni

引用次数: 0

Cryptographic Puzzles and Complex Systems 密码谜题和复杂系统

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-09-15 DOI: 10.25088/complexsystems.30.3.375

Rade Vuckovac

引用次数: 0

Spatial Signatures of Road Network Growth for Different Levels of Global Planning 全球规划不同层次下路网增长的空间特征

IF 0.4 4区数学

Advances in Complex Systems Pub Date : 2021-09-15 DOI: 10.25088/complexsystems.30.3.273

M. Cirunay, R. Batac

引用次数: 2