Chaos, Solitons and Fractals: X最新文献

Effects of synapse location, delay and background stochastic activity on synchronising hippocampal CA1 neurons 突触位置、延迟和背景随机活动对海马 CA1 神经元同步化的影响

Chaos, Solitons and Fractals: X Pub Date : 2024-11-04 DOI: 10.1016/j.csfx.2024.100122

Alessandro Fiasconaro , Michele Migliore

{"title":"Effects of synapse location, delay and background stochastic activity on synchronising hippocampal CA1 neurons","authors":"Alessandro Fiasconaro , Michele Migliore","doi":"10.1016/j.csfx.2024.100122","DOIUrl":"10.1016/j.csfx.2024.100122","url":null,"abstract":"<div><div>We study the synchronisation of neurons in a realistic model under the Hodgkin–Huxley dynamics. To focus on the role of the different locations of the excitatory synapses, we use two identical neurons where the set of input signals is grouped at two different distances from the soma. The system is intended to represent a CA1 hippocampal neuron in which the synapses arriving from the CA3 neurons of the trisynaptic pathway appear to be localised in the apical dendritic region and are, in principle, either proximal or distal to the soma. Synchronisation is studied using a specifically defined spiking correlation function as a function of various parameters such as the distance from the soma of one of the synaptic groups, the inhibition weight and the associated activation delay. We found that the neurons’ spiking activity depends nonmonotonically on the relative dendritic location of the synapses and their inhibition weight, while the synchronisation measure always decreases with inhibition, and strongly depends on its activation time delay. In our model, the synaptic random subthreshold background activity substantially reduces synchronisation in a monotonic way, while highlights the importance of a balanced E/I contribution for neuronal synchronisation.</div></div>","PeriodicalId":37147,"journal":{"name":"Chaos, Solitons and Fractals: X","volume":"13 ","pages":"Article 100122"},"PeriodicalIF":0.0,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solitary and traveling wave solutions to nematic liquid crystal equations using Jacobi elliptic functions 使用雅可比椭圆函数的向列液晶方程的孤波和行波解法

Chaos, Solitons and Fractals: X Pub Date : 2024-09-18 DOI: 10.1016/j.csfx.2024.100121

Nikola Petrović , Milivoj Belić , Wieslaw Krolikowski

引用次数: 0

A high-order rogue wave generated by collision in three-component Bose–Einstein condensates 三组份玻色-爱因斯坦凝聚体碰撞产生的高阶流氓波

Chaos, Solitons and Fractals: X Pub Date : 2024-08-22 DOI: 10.1016/j.csfx.2024.100120

Feilong He , Xiao-Dong Bai , Tiantian Li , Jin-Cui Zhao

引用次数: 0

Recurrence formula for some higher order evolution equations 一些高阶演化方程的递推公式

Chaos, Solitons and Fractals: X Pub Date : 2024-07-20 DOI: 10.1016/j.csfx.2024.100119

Yoritaka Iwata

引用次数: 0

Finite-time dynamics of the fractional-order epidemic model: Stability, synchronization, and simulations 分数阶流行病模型的有限时间动力学：稳定性、同步性和模拟

Chaos, Solitons and Fractals: X Pub Date : 2024-07-15 DOI: 10.1016/j.csfx.2024.100118

Iqbal M. Batiha , Osama Ogilat , Issam Bendib , Adel Ouannas , Iqbal H. Jebril , Nidal Anakira

引用次数: 0

Power and Mittag–Leffler laws for examining the dynamics of fractional unemployment model: A comparative analysis 用于研究分数失业模型动态的 Power 和 Mittag-Leffler 法：比较分析

Chaos, Solitons and Fractals: X Pub Date : 2024-06-26 DOI: 10.1016/j.csfx.2024.100117

Binandam S. Lassong , Munkaila Dasumani , Joseph K. Mung’atu , Stephen E. Moore

{"title":"Power and Mittag–Leffler laws for examining the dynamics of fractional unemployment model: A comparative analysis","authors":"Binandam S. Lassong , Munkaila Dasumani , Joseph K. Mung’atu , Stephen E. Moore","doi":"10.1016/j.csfx.2024.100117","DOIUrl":"https://doi.org/10.1016/j.csfx.2024.100117","url":null,"abstract":"<div><p>Unemployment is a major problem worldwide and is one of the key factors determining a nation’s economic status. The issue of unemployment is made more difficult globally by the ongoing rise in labor force participation and the scarcity of job positions. In this work, we study the unemployment model with two distinct fractional-order derivatives: the Caputo operator and the Atangana–Baleanu operator in the sense of Caputo (ABC). These derivatives under consideration are the operators widely utilized in modeling real-world phenomena in fractional dynamics. The existence and uniqueness of the solutions to the fractional model under consideration are ascertained using the fixed-point theory. The Hyers-Ulam analysis is employed to determine stability. For the numerical results, we present an Adams-type predictor–corrector (PC) technique for Caputo derivative and an extended Adams Bashforth (ABM) method for Atangana–Baleanu derivative. The outcomes achieved with the Atangana–Baleanu–Caputo and Caputo derivatives are identical to those of the regular case when fractional order <span><math><mrow><mi>ν</mi><mo>=</mo><mn>1</mn><mo>.</mo><mn>00</mn></mrow></math></span>. However, the results obtained change slightly as fractional order assumes values smaller than one, and this variation becomes most noticeable when the fractional order <span><math><mrow><mi>ν</mi><mo><</mo><mn>0</mn><mo>.</mo><mn>72</mn></mrow></math></span>. This is because of the fractional derivative definitions’ underlying kernel. It is shown that the Mittag–Leffler kernel derivative provides better results for smaller fractional orders.</p></div>","PeriodicalId":37147,"journal":{"name":"Chaos, Solitons and Fractals: X","volume":"13 ","pages":"Article 100117"},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590054424000149/pdfft?md5=f9ae21d7cb20f78864491c0114c22404&pid=1-s2.0-S2590054424000149-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141541751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From core to peripheral: A network analysis of lineup types in NBA playoff teams 从核心到边缘：NBA 季后赛球队阵容类型的网络分析

Chaos, Solitons and Fractals: X Pub Date : 2024-06-06 DOI: 10.1016/j.csfx.2024.100115

Tianxiao Guo , Yixiong Cui , Christophe Ley , Wenjie Zhang , Yanfei Shen , Jing Mi , Chengyi Zhang

{"title":"From core to peripheral: A network analysis of lineup types in NBA playoff teams","authors":"Tianxiao Guo , Yixiong Cui , Christophe Ley , Wenjie Zhang , Yanfei Shen , Jing Mi , Chengyi Zhang","doi":"10.1016/j.csfx.2024.100115","DOIUrl":"https://doi.org/10.1016/j.csfx.2024.100115","url":null,"abstract":"<div><p>This study aims to identify the types of lineups based on their topological structure within a lineup network and to explore the relationship between lineup types and team standings during 10 NBA playoff seasons from 2012-2013 season to 2021-2022 season. A total of 15,699 lineups from 1,655 playoff games were collected to construct lineup networks. Three roles of the lineup, called core, connector and peripheral lineups, were found through community detection and unsupervised clustering of within-community degree, participation coefficient, and playing time. The percentage presence of connector lineups showed a positive correlation with the number of playoff wins (<em>r</em> = 0.45, <em>p</em> < 0.001), while peripheral lineups demonstrated a negative correlation (<em>r</em> = −0.33, <em>p</em> < 0.001). Additionally, the study found that connector lineups were more frequently reused than peripheral lineups (<em>H</em> = −14.90, <em>p</em> < 0.001) and that stronger teams exhibited lower conserved rates of all kinds of lineups. The collective performance was found to be more dependent on connector lineups (<em>H</em> = 926.42, <em>p</em> < 0.001) than peripheral lineups (<em>H</em> = 3342.63, <em>p</em> < 0.001). This study is the first to provide insights into the global lineup roles within season-scale lineup structures, offering generalizable suggestions for optimizing rotations. These suggestions advocate for the inclusion of more connector lineups and versatile players, and a reduction in the reuse rate of lineups, especially those classified as peripheral.</p></div>","PeriodicalId":37147,"journal":{"name":"Chaos, Solitons and Fractals: X","volume":"13 ","pages":"Article 100115"},"PeriodicalIF":0.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590054424000125/pdfft?md5=f3022a72be3148f19ee28cafa9583005&pid=1-s2.0-S2590054424000125-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141324046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Buildup of different emission regimes in a nonlinear polarization rotation modelocked all-fiber laser 在非线性偏振旋转建模全光纤激光器中建立不同的发射机制

Chaos, Solitons and Fractals: X Pub Date : 2024-06-04 DOI: 10.1016/j.csfx.2024.100114

C. Cuadrado-Laborde , L. Tendela , E. Silvestre , A. Díez , J.L. Cruz , M.V. Andrés

引用次数: 0

Modeling the spread of infections during an epidemiological outbreak using an improved mathematical model 利用改进的数学模型模拟流行病爆发期间的感染传播

Chaos, Solitons and Fractals: X Pub Date : 2024-05-22 DOI: 10.1016/j.csfx.2024.100111

Nouf Abd Elmunim

{"title":"Modeling the spread of infections during an epidemiological outbreak using an improved mathematical model","authors":"Nouf Abd Elmunim","doi":"10.1016/j.csfx.2024.100111","DOIUrl":"https://doi.org/10.1016/j.csfx.2024.100111","url":null,"abstract":"<div><p>Pandemics occur periodically worldwide. An accurate forecasting model is therefore essential to estimate the effect of the pandemic and plan accordingly. This research aims to provide a solution that could help the world predict the number of infection cases during pandemics and prepare to accommodate subsequent cases. The mathematical Multiplicative Holt–Winter (M-HW) model was improved regarding the data used to provide an accurate forecast. The model was applied to the Coronavirus (COVID-19) data, where COVID-19 is the recent pandemic that affected all nations worldwide since 2019. Two different periods in Saudi Arabia were modelled to estimate COVID-19 cases. Based on the daily confirmed cases in February 2023 and February 2022, the model showed accuracy of 99.51 % and 99.66 %, respectively. A MAPE value in February 2023 ranges between 0.015 and 1.07, while it ranges between 0.032 and 2.269 in February 2022. Additionally, the RMSE in February 2023 was 0.35, while in February 2022 it was 6.88. The model proved to be accurate and highly efficient. Thus, M-HW model is useful to forecast the number of cases in different regions in case of a pandemic, which makes a significant contribution to mitigating the spread of the virus minimizing the epidemiological spread impact on healthcare systems and focusing on managing and containing the epidemiological spread.</p></div>","PeriodicalId":37147,"journal":{"name":"Chaos, Solitons and Fractals: X","volume":"12 ","pages":"Article 100111"},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590054424000083/pdfft?md5=b3fceba1f3a2cfb95e31d29b4c6d7b36&pid=1-s2.0-S2590054424000083-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141097743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A powerful tool for dealing with high-dimensional fractional-order systems with applications to fractional Emden–Fowler systems 处理高维分数阶系统的强大工具，应用于分数埃姆登-福勒系统

Chaos, Solitons and Fractals: X Pub Date : 2024-05-03 DOI: 10.1016/j.csfx.2024.100110

Shaher Momani , Iqbal M. Batiha , Amira Abdelnebi , Iqbal H. Jebril

引用次数: 0