The European Physical Journal Special Topics最新文献_第9页

Correction to: Metallicity relations in LMC and SMC from the slope of red giant branch stars in globular cluster 更正：从球状星团红巨分支恒星的斜率看 LMC 和 SMC 的金属度关系

The European Physical Journal Special Topics Pub Date : 2024-07-18 DOI: 10.1140/epjs/s11734-024-01248-6

Saurabh Sharma, Jura Borissova

引用次数: 0

On the occurrence of multiscroll and multistable dynamics in a star network of four nonlinearly coupled self-driven Duffing–Rayleigh oscillators 论四个非线性耦合自驱动达芬-雷利振荡器星型网络中多卷和多稳态动力学的发生

The European Physical Journal Special Topics Pub Date : 2024-07-18 DOI: 10.1140/epjs/s11734-024-01241-z

Jayaraman Venkatesh, Janarthanan Ramadoss, Jean Chamberlain Chedjou, Kengne Jacques, Karthikeyan Rajagopal

{"title":"On the occurrence of multiscroll and multistable dynamics in a star network of four nonlinearly coupled self-driven Duffing–Rayleigh oscillators","authors":"Jayaraman Venkatesh, Janarthanan Ramadoss, Jean Chamberlain Chedjou, Kengne Jacques, Karthikeyan Rajagopal","doi":"10.1140/epjs/s11734-024-01241-z","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01241-z","url":null,"abstract":"The study of oscillator networks is currently the subject of intensive efforts for researchers working in the field of non-linear science. In this article, we are interested in the collective behavior of a star network formed by four mutually coupled Rayleigh–Duffing type oscillators (RDO here after) although each isolated oscillator undergoes a fixed point motion. The coupling considered is non-linear but exploits the intrinsic non-linearity of each of the oscillators so that no non-linear coupling function is necessary as usual. Using analytical techniques, the basic properties of the star system are studied in terms of equilibrium points and their stability, conditions for the appearance of Hopf bifurcations, dissipation and existence of attractors. The direct numerical integration of the mathematical model highlights fascinating phenomena, such as the coexistence of several parallel bifurcation branches, the coexistence of dynamics of the same type or of different types (i.e., regular and chaotic, hidden or self-excited) as well as multi-spiral chaos. These features are uncovered when changing both initial conditions and parameters. The tests carried out in the laboratory using the Arduino module show very good agreement with the results of the theoretical analysis. The study conducted out in this article provides valuable information as a prelude to understanding the behavior of a much more complex network of Rayleigh–Duffing type oscillators and Gunn type microwave oscillators as well.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738602","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

Modeling of COVID-19 with vaccination and optimal control COVID-19 疫苗接种和优化控制模型

The European Physical Journal Special Topics Pub Date : 2024-07-16 DOI: 10.1140/epjs/s11734-024-01246-8

A. Karthik, M. Ghosh

引用次数: 0

Rebound micro-cavitation dynamics with ultrasound fields during histotripsy: a numerical investigation 组织切削过程中超声场的反弹微腔动力学：数值研究

The European Physical Journal Special Topics Pub Date : 2024-07-16 DOI: 10.1140/epjs/s11734-024-01232-0

A. K. Abu-Nab, Zain F. AbuShaeer, A. Abu-Bakr

引用次数: 0

Robust sampled-data synchronization of chaotic fractional variable order neural networks with time delays 有时间延迟的混沌分数变阶神经网络的鲁棒采样数据同步

The European Physical Journal Special Topics Pub Date : 2024-07-15 DOI: 10.1140/epjs/s11734-024-01242-y

R. Kiruthika, A. Manivannan

引用次数: 0

Probing intractable beyond-standard-model parameter spaces armed with machine learning 用机器学习武装探索棘手的超标准模型参数空间

The European Physical Journal Special Topics Pub Date : 2024-07-15 DOI: 10.1140/epjs/s11734-024-01236-w

Rajneil Baruah, Subhadeep Mondal, Sunando Kumar Patra, Satyajit Roy

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Influence of ultrasound on the dynamics of an air bubble near a solid surface 超声波对固体表面附近气泡动力学的影响

The European Physical Journal Special Topics Pub Date : 2024-07-15 DOI: 10.1140/epjs/s11734-024-01243-x

Michael O. Kuchinskiy, T. Lyubimova, Konstantin A. Rybkin, Vasiliy A. Galishevskiy, Anastasiia D. Sadovnikova

引用次数: 0

Assessing lepton flavor universality violations in semileptonic decays 评估半轻子衰变中的轻子味道普遍性违规行为

The European Physical Journal Special Topics Pub Date : 2024-07-12 DOI: 10.1140/epjs/s11734-024-01239-7

Sonali Patnaik, Lopamudra Nayak, Rajeev Singh

{"title":"Assessing lepton flavor universality violations in semileptonic decays","authors":"Sonali Patnaik, Lopamudra Nayak, Rajeev Singh","doi":"10.1140/epjs/s11734-024-01239-7","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01239-7","url":null,"abstract":"In light of recent measurements suggesting potential lepton flavor universality violations in semileptonic decays at collider experiments, this article provides a concise study of tree- and loop-level B-hadron semileptonic decays, (b rightarrow c l nu _l) and (b rightarrow s l^+ l^-). We provide predictions for lepton flavor violating observables, ({mathcal {R}}_{J/psi }) and ({mathcal {R}}_{eta _c}), across the entire (q^2) range. Our study employs the Relativistic Independent Quark Model (RIQM), highlighting a model-dependent approach to these observables. We compare our model’s predictions with existing lattice predictions, demonstrating the strong applicability of the RIQM framework in describing (B_c) decays. Additionally, we reassess global averages for ({mathcal {R}}_{D(D^*)}) and ({mathcal {R}}_{K(K^*)}) in semileptonic transitions. With the upcoming experimental upgrades and the anticipated Run 3 data on (B_c) meson decays, rapid confirmation of these quantities could indicate significant evidence of physics beyond the Standard Model, thereby opening new pathways for understanding the complex flavor dynamics in B meson decays.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141615073","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

To the effect of interparticle interaction on dynamic remagnetization of ferromagnetic nanoparticles 颗粒间相互作用对铁磁性纳米颗粒动态再磁化的影响

The European Physical Journal Special Topics Pub Date : 2024-07-11 DOI: 10.1140/epjs/s11734-024-01225-z

A. Yu. Zubarev, L. Yu. Iskakova

引用次数: 0

Non-fragile tracking controller design for fractional order systems against active disturbance rejection 针对主动干扰抑制的分数阶系统的非脆弱跟踪控制器设计

The European Physical Journal Special Topics Pub Date : 2024-07-10 DOI: 10.1140/epjs/s11734-024-01217-z

S. Arivumani, P. Vadivel, G. Rajchakit, T. Saravanakumar

{"title":"Non-fragile tracking controller design for fractional order systems against active disturbance rejection","authors":"S. Arivumani, P. Vadivel, G. Rajchakit, T. Saravanakumar","doi":"10.1140/epjs/s11734-024-01217-z","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01217-z","url":null,"abstract":"In this work, a new non-fragile based tracking controller design for fractional order systems with non-linear uncertainty, unidentified external disturbances, and time-delay is investigated. A novel structure of a fractional order non-fragile repetitive controller is suggested to obtain the tracking performance for the addressed system. In particular, gain fluctuations are used with an improved two-degrees-of-freedom Smith predictor in the construction of this structure. Using the Lyapunov–Krasovskii stability theory and a continuous amplitude distributed equivalent system, a new set of criteria to determine the asymptotic stability of the associated closed-loop system is proposed in the context of linear matrix inequalities. Within a single framework, disturbance estimation, asymptotic tracking, and time delay compensation are all done using the obtained stability results. The resulting theoretical results are finally confirmed by numerical examples that demonstrate how the specified constraints could lead the system output to precisely match any defined reference signal by balancing for the unidentified exterior disturbance.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141585784","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