The European Physical Journal Special Topics最新文献_第6页

Characterization of cross-correlations in electrocorticograms of anesthetized mice 麻醉小鼠皮层电图交叉相关的特征

The European Physical Journal Special Topics Pub Date : 2024-08-08 DOI: 10.1140/epjs/s11734-024-01288-y

V. V. Adushkina, A. N. Pavlov

引用次数: 0

Intermittent generalized synchronization in unidirectionally coupled systems with different topology of attractors 具有不同吸引子拓扑结构的单向耦合系统中的间歇广义同步性

The European Physical Journal Special Topics Pub Date : 2024-08-07 DOI: 10.1140/epjs/s11734-024-01284-2

Olga I. Moskalenko, Maria K. Kurovskaya, Alexey A. Koronovskii

引用次数: 0

Experimental study on coherent structures by small particles suspended in high aspect-ratio ( $$Gamma =$$ 2.5) thermocapillary liquid bridges of high Prandtl number 关于悬浮在高纵横比（$$Gamma =$$ 2.5）高普朗特数热毛细管液桥中的小颗粒相干结构的实验研究

The European Physical Journal Special Topics Pub Date : 2024-08-06 DOI: 10.1140/epjs/s11734-024-01180-9

Keiichiro Kato, Shogo Sensui, Shin Noguchi, Kizuku Kurose, Ichiro Ueno

引用次数: 0

Designing sampled data controller for time-delayed fractional-order neural networks via a new functional approach 通过新函数方法为时延分数阶神经网络设计采样数据控制器

The European Physical Journal Special Topics Pub Date : 2024-08-06 DOI: 10.1140/epjs/s11734-024-01261-9

N. Padmaja

引用次数: 0

Deterministic-like data-driven discovery of stochastic differential equations via the Feynman–Kac formalism 通过费曼-卡克（Feynman-Kac）形式主义，以类似确定性的数据驱动发现随机微分方程

The European Physical Journal Special Topics Pub Date : 2024-08-06 DOI: 10.1140/epjs/s11734-024-01270-8

Chaoxiang Ma, Cheng Huang, Cheng Cheng, Xiuting Li

{"title":"Deterministic-like data-driven discovery of stochastic differential equations via the Feynman–Kac formalism","authors":"Chaoxiang Ma, Cheng Huang, Cheng Cheng, Xiuting Li","doi":"10.1140/epjs/s11734-024-01270-8","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01270-8","url":null,"abstract":"This paper develops a data-driven deterministic identification architecture for discovering stochastic differential equations (SDEs) directly from data. The architecture first generates deterministic data for stochastic processes using the Feynman–Kac formula, and gives a parabolic partial differential equation (PDE) associated with the SDE. Then, a sparse regression model is proposed to discover drift and diffusion terms in SDEs using PDE data-driven techniques, where a large candidate library of potential terms only for the drift and diffusion coefficients in SDEs need be constructed. To simultaneously infer the drift and diffusion terms, we proposed a sequential thresholded reweighted least-squares algorithm to solve the constructed sparse regression model. The main advantage of the proposed method is that on the one hand, theoretical and numerical identification results of PDEs can be used for SDEs, on the score, our SDE identification problem is translated into the parameter estimation problem of PDEs, on the other hand, the proposed algorithm is easily executed and can enhance the sparsity and accuracy. Through several classical SDEs and ordinary differential equations, the effectiveness of the proposed data-driven method is demonstrated, and several comparison experiments with state-of-the-art approaches is provided to illustrate the superiority of the developed algorithm.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141940100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring tumor-induced immunosuppression dynamics by myeloid-derived suppressor cells: insights via a fractional-order mathematical model 探索髓源性抑制细胞诱导的肿瘤免疫抑制动态：通过分数阶数学模型获得的启示

The European Physical Journal Special Topics Pub Date : 2024-08-06 DOI: 10.1140/epjs/s11734-024-01260-w

B. Krithika, P. Tamilalagan

{"title":"Exploring tumor-induced immunosuppression dynamics by myeloid-derived suppressor cells: insights via a fractional-order mathematical model","authors":"B. Krithika, P. Tamilalagan","doi":"10.1140/epjs/s11734-024-01260-w","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01260-w","url":null,"abstract":"This study investigates the intricate role of myeloid-derived suppressor cells (MDSCs) in inhibiting the immunological responses against malignancies by employing a delayed fractional-order mathematical model. The proposed mathematical model includes tumor cells, dendritic cells, macrophages, cytotoxic T lymphocytes (CTLs), and MDSCs as components of a five-dimensional deterministic system. Further, the model accounts for the duration of the mechanism by which MDSCs perform immunosuppressive activities. One such mechanism involves the release of immunosuppressive cytokines such as interleukin-10 (IL-10), and it is elucidated by incorporation of the time-delay parameter, (tau). Basic properties of the system such as non-negativity and uniqueness of solutions as well as the existence of biologically feasible steady states are explored. The conditions for steady-state stability and existence of Hopf bifurcation concerning the delay parameter ((tau )) are established. We notice that the growth rate of cancer cells determines the stability nature of the tumor-free equilibrium, regardless of the time-delay (tau). While the fractional-order (alpha) does not affect the stability of steady states, however it does influence the transient behavior of the considered system.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"96 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141940050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An introduction to phase ordering in scalar active matter 标量活性物质相序导论

The European Physical Journal Special Topics Pub Date : 2024-08-05 DOI: 10.1140/epjs/s11734-024-01273-5

Laura Meissner, Julia M. Yeomans

引用次数: 0

Stabilization of T–S fuzzy membership-function dependent H $$_infty $$ -based sampled-data control systems using an improved exponential two-sided looped-functional approach 使用改进的指数双面循环函数法稳定基于 T-S 模糊成员函数依赖 H $$_infty $$ 的采样数据控制系统

The European Physical Journal Special Topics Pub Date : 2024-08-05 DOI: 10.1140/epjs/s11734-024-01262-8

Kumarasamy Palanimuthu, Seong Ryong Lee, Jae Hoon Jeong, Young Hoon Joo

{"title":"Stabilization of T–S fuzzy membership-function dependent H $$_infty $$ -based sampled-data control systems using an improved exponential two-sided looped-functional approach","authors":"Kumarasamy Palanimuthu, Seong Ryong Lee, Jae Hoon Jeong, Young Hoon Joo","doi":"10.1140/epjs/s11734-024-01262-8","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01262-8","url":null,"abstract":"This study concerns the exponential stability and stabilization problem for the Takagi–Sugeno (T–S) fuzzy systems under the membership function dependent (MFD) H(_infty )-based sampled-data control (SDC) using an improved exponential two-sided looped-functional (TSLF) approach. First, an exponential TSLF is introduced to achieve the state information within the intervals (t_{textrm{k}}) to t and t to (t_{textrm{k}+1}), which not only relaxes the monotonic constraint but would also not impose the terms as positive definite. By employing the concept of looped-functional, a new exponential TSLF is introducing the exponents (e^{2alpha (t-t_{textrm{k}})},) (frac{e^{2alpha (t_{textrm{k}+1}-t)}-1}{2alpha }), and (frac{e^{-2alpha (t-t_{textrm{k}})}-1}{2alpha }), thereby enhancing the control performance, design flexibility and also it contains the more actual sampling information of system states. Next, the new exponentially stable lemma is derived from the fuzzy SDC system with an external disturbance. To this end, the time derivatives of exponential TSLF-based Lyapunov–Krasovskii functional, some stabilization criteria exist in formulating linear matrix inequalities to secure the system is exponentially stable under MFD H(_infty ) criterion. Finally, the chaotic permanent magnet synchronous generator-based wind energy system is demonstrated under the practical values with proposed sufficient conditions, and Rossler’s model expresses the advantages and excellence of the proposed techniques.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141940051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Active disturbance reduction scheme for descriptor semi-Markovian jump systems with nonlinear uncertainties 具有非线性不确定性的描述符半马尔可夫跳跃系统的主动干扰减少方案

The European Physical Journal Special Topics Pub Date : 2024-08-05 DOI: 10.1140/epjs/s11734-024-01275-3

S. Mohanapriya, S. Harshavarthini

引用次数: 0

Practicing aspects of gamma-ray spectroscopy for nuclear astrophysics 核天体物理学伽马射线光谱学的实践方面

The European Physical Journal Special Topics Pub Date : 2024-08-05 DOI: 10.1140/epjs/s11734-024-01278-0

Rajarshi Raut

引用次数: 0