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A deep learning architecture using hybrid and stacks to forecast weekly dengue cases in Laos 利用混合和堆栈的深度学习架构预测老挝每周登革热病例
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-08-01 DOI: 10.1140/epjb/s10051-024-00752-x
Sathi Patra, Soovoojeet Jana, Sayani Adak, T. K. Kar
{"title":"A deep learning architecture using hybrid and stacks to forecast weekly dengue cases in Laos","authors":"Sathi Patra,&nbsp;Soovoojeet Jana,&nbsp;Sayani Adak,&nbsp;T. K. Kar","doi":"10.1140/epjb/s10051-024-00752-x","DOIUrl":"10.1140/epjb/s10051-024-00752-x","url":null,"abstract":"<p>Dengue is an arthropod-borne viral disease prevalent in tropical and subtropical regions. Its adverse impact on human health and the global economy cannot be exaggerated. To improve the efficacy of vector control measures, there is a critical need for mechanisms that can forecast dengue cases with greater accuracy and urgency than before. So, we employ some deep learning techniques using the previous ten years of weekly dengue cases in Laos. A hybrid model combining CNN and stacked LSTM (BiLSTM) is applied along with CNN, LSTM, BiLSTM, and ConvLSTM in this work. Comparing all the outputs we have derived, hybrid CNN and 1 stacked BiLSTM outperform other deep learning models with the one-step-ahead prediction. Further, we have concluded that hybrid CNN and 1 stacked BiLSTM can considerably boost dengue prediction and can be applied in other dengue-prone regions.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 8","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Theoretical investigation of the sensing capabilities of intrinsic and Fe-modified net-Y on SF(_6) decomposition products 本征和铁改性净-Y 对 SF_6$$ 分解产物传感能力的理论研究
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-29 DOI: 10.1140/epjb/s10051-024-00755-8
Shun-Yu Wang, Zhi-Gang Shao, Cang-Long Wang, Lei Yang
{"title":"Theoretical investigation of the sensing capabilities of intrinsic and Fe-modified net-Y on SF(_6) decomposition products","authors":"Shun-Yu Wang,&nbsp;Zhi-Gang Shao,&nbsp;Cang-Long Wang,&nbsp;Lei Yang","doi":"10.1140/epjb/s10051-024-00755-8","DOIUrl":"10.1140/epjb/s10051-024-00755-8","url":null,"abstract":"<p>Detection of SF<span>(_6)</span> decomposition gases is crucial in power equipment maintenance. This paper investigates the adsorption behavior of SO<span>(_2)</span> and H<span>(_2)</span>S on the intrinsic and Fe-modified net-Y surfaces using density functional theory. The adsorption parameters and electronic attributes of diverse configurations have been scrutinized. Calculations indicate that net-Y exhibits limited adsorption capacity for both gases. The doped substrate exhibits a localized magnetic moment around the Fe atom, indicating the possible occurrence of the Kondo effect in the system. The substrate chemisorbs with the target gas through the Fe 3d orbitals. Additionally, after the adsorption of gases, the system undergoes a transition from metallic to semiconductor properties, accompanied by a near-complete disappearance of magnetism. Specifically, in two adsorption configurations, the systems manifest the characteristics of half-semiconductor and half-metal, respectively. Our study provides evidence that the incorporation of Fe-modified net-Y shows potential as a disposable device for detecting and purifying the decomposition products of SF<span>(_6)</span>, presenting a prospective application for net-Y in spintronic devices.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141873088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of the non-Euclidean lower critical dimension for the site percolation problem 确定场地渗流问题的非欧几里得临界下维度
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-27 DOI: 10.1140/epjb/s10051-024-00753-w
P. M. Centres, F. Nieto
{"title":"Determination of the non-Euclidean lower critical dimension for the site percolation problem","authors":"P. M. Centres,&nbsp;F. Nieto","doi":"10.1140/epjb/s10051-024-00753-w","DOIUrl":"10.1140/epjb/s10051-024-00753-w","url":null,"abstract":"<p>The investigation of site percolation on Sierpinski carpets is carried out through comprehensive numerical simulations. We utilize finite- size scaling theory, staying within the constraints of our computational resources, to determine critical exponents and percolation thresholds. Moreover, we employ an approach developed by Elliot et al. (Phys Rev C 6:3185, 1994; Phys Rev C 55:1319, 1997), which streamlines the process by eliminating the necessity of dealing with large lattices. This method facilitates the extraction of critical quantities that characterize the transition from a single generation within a given structure. By implementing this procedure, we enhance efficiency and accuracy in analyzing the percolation phenomenon on Sierpinski carpets. The obtained values of the percolation thresholds are plotted as a function of the fractal dimensions in order to determine the lower critical dimension of the site percolation problem which is calculated to be <span>(d_c^L=1.52)</span>. In addition, the behavior of the critical exponents as a function of the fractal dimension is also shown and discussed.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetohydro-convective instability in a saturated Darcy–Brinkman medium with viscous dissipation 具有粘性耗散的饱和达西-布林克曼介质中的磁流对流不稳定性
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-26 DOI: 10.1140/epjb/s10051-024-00738-9
Anil Kumar, D. Bhargavi, P. G. Siddheshwar
{"title":"Magnetohydro-convective instability in a saturated Darcy–Brinkman medium with viscous dissipation","authors":"Anil Kumar,&nbsp;D. Bhargavi,&nbsp;P. G. Siddheshwar","doi":"10.1140/epjb/s10051-024-00738-9","DOIUrl":"10.1140/epjb/s10051-024-00738-9","url":null,"abstract":"<div><p>The influence of dissipation with viscosity on magnetohydro-convective instability in a saturated Darcy–Brinkman medium is examined. The bottom boundary is designated as adiabatic, whereas the top boundary is isothermal. Numerical linear stability analysis investigates normal modes that disturb the horizontal base flow at different inclinations. The case study shows that the most unstable disturbances are horizontal rolls, normal modes characterized by a wave vector perpendicular to the main flow direction. The horizontal rolls are the favored instability mode. Barletta et al. also showed that horizontal rolls are more unstable than any other oblique roll mode in the hydromagnetic scenario. This finding provides insights into the behavior of MHD fluid flow and heat transfer in porous media, with implications for applications in geoscience, engineering, and environmental science.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Publisher Correction: Effects of ballistic transport on the thermal resistance and temperature profile in nanowires 出版商更正：弹道传输对纳米线热阻和温度曲线的影响
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-25 DOI: 10.1140/epjb/s10051-024-00744-x
R. Meyer, Graham W. Gibson, Alexander N. Robillard
{"title":"Publisher Correction: Effects of ballistic transport on the thermal resistance and temperature profile in nanowires","authors":"R. Meyer,&nbsp;Graham W. Gibson,&nbsp;Alexander N. Robillard","doi":"10.1140/epjb/s10051-024-00744-x","DOIUrl":"10.1140/epjb/s10051-024-00744-x","url":null,"abstract":"","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjb/s10051-024-00744-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Periodic boundary condition effects in small-world networks 小世界网络中的周期性边界条件效应
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-25 DOI: 10.1140/epjb/s10051-024-00746-9
Yann Lucas Silva, Ariadne de Andrade Costa
{"title":"Periodic boundary condition effects in small-world networks","authors":"Yann Lucas Silva,&nbsp;Ariadne de Andrade Costa","doi":"10.1140/epjb/s10051-024-00746-9","DOIUrl":"10.1140/epjb/s10051-024-00746-9","url":null,"abstract":"<p>Understanding boundary conditions is crucial for properly modeling interactions and constraints within a system. In particular, periodic boundary conditions play an important role, because they allow systems to be treated as if existing in a continuous, constraint-free space, with significant relevance across diverse scientific fields. Our study explores the effects of periodic boundary conditions on Small-World networks by comparing traditional and flat versions derived from Ring and Line networks, respectively, through comparisons of network metrics and disconnection assessments. Recognizing the critical role of network topology in the behavior of dynamical models, we use an epidemic model to show that the structure of a network can either facilitate or hinder the spread of disease, emphasizing the importance of boundary conditions on these dynamics. The faster spread of disease in Ring networks, with shorter Average Shortest Paths, as well as their resilience on keeping network connectivity under rewiring, illustrate the impact that periodic boundary conditions can have on epidemic scenarios.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of Mn-doping on structural, electronic, ferromagnetic, and optical properties of monolayer-WSe2 using first-principles calculations 利用第一性原理计算掺杂锰对单层硒化硅结构、电子、铁磁和光学特性的影响
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-25 DOI: 10.1140/epjb/s10051-024-00748-7
M. S. Woldesenbet, N. G. Debelo, M. M. Woldemariam
{"title":"The effect of Mn-doping on structural, electronic, ferromagnetic, and optical properties of monolayer-WSe2 using first-principles calculations","authors":"M. S. Woldesenbet,&nbsp;N. G. Debelo,&nbsp;M. M. Woldemariam","doi":"10.1140/epjb/s10051-024-00748-7","DOIUrl":"10.1140/epjb/s10051-024-00748-7","url":null,"abstract":"<div><p>This study employs density functional theory, utilizing plane wave ultra-soft pseudopotentials (PW-USPPs) within the generalized gradient approximation (GGA) and incorporating the Hubbard potential (GGA + U), to investigate the structural, electronic, and magnetic characteristics of Mn-doped 2D—WSe<sub>2</sub> monolayers. The pristine WSe<sub>2</sub> monolayer is identified as a nonmagnetic direct band gap semiconductor with a band gap of 1.55 eV. Upon substituting Mn for W in the WSe<sub>2</sub> monolayer, the resulting structure exhibits enhanced stability, indicated by a negative formation energy. The Mn-doped monolayer-WSe<sub>2</sub> adopts a semi-metallic nature, deviating from the nonmagnetic characteristics of the pristine 2D—WSe<sub>2</sub>, showcasing impurity bands dispersion near the Fermi level. The total magnetic moment within the nearest neighboring interactions of the Mn impurity atoms increases notably and it is attributed to the electron-correlation effect in the high spin state under the GGA + U approximation. However, this correlation effect proves insignificant on the total magnetic moment for the second nearest neighboring interactions, yielding consistent outcomes in both GGA and GGA + U approximations. The transition of ferromagnetic to antiferromagnetic states occurs within the temperature range of 400 K–450 K for low Mn-atom concentrations (below 12.5%), indicating long-range ferromagnetic ordering crucial for high-temperature 2D-diluted magnetic semiconductors. However, at high concentrations of impurity atoms, the temperature drops below room temperature (220 K in 22.2%) in the doped monolayer WSe<sub>2</sub>, showing weak magnetic interaction. Lastly, the optical properties of the doped system is studied by applying polarization in perpendicular and parallel directions to the plane of the monolayer.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Hamiltonian approach to the gradient-flow equations in information geometry 信息几何中梯度流方程的哈密顿方法
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-22 DOI: 10.1140/epjb/s10051-024-00747-8
Tatsuaki Wada, Antonio M. Scarfone
{"title":"A Hamiltonian approach to the gradient-flow equations in information geometry","authors":"Tatsuaki Wada,&nbsp;Antonio M. Scarfone","doi":"10.1140/epjb/s10051-024-00747-8","DOIUrl":"10.1140/epjb/s10051-024-00747-8","url":null,"abstract":"<p>We have studied the gradient-flow equations in information geometry from a point-particle perspective. Based on the motion of a null (or light-like) particle in a curved space, we have rederived the Hamiltonians which describe the gradient-flows in information geometry.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Does a severe regulatory policy on trade benefit the economy? 严厉的贸易监管政策是否有利于经济？
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-15 DOI: 10.1140/epjb/s10051-024-00739-8
Tiago de Sousa Araújo Cassiano, Fábio Luís de Oliveira Paula, Leonardo Luiz e Castro
{"title":"Does a severe regulatory policy on trade benefit the economy?","authors":"Tiago de Sousa Araújo Cassiano,&nbsp;Fábio Luís de Oliveira Paula,&nbsp;Leonardo Luiz e Castro","doi":"10.1140/epjb/s10051-024-00739-8","DOIUrl":"10.1140/epjb/s10051-024-00739-8","url":null,"abstract":"<p>The appropriate amount of regulation to reconcile social stability and economic prosperity is a subject of intense study and debate. In practice, the degree of regulatory enforcement is at least as important as the regulation itself. In this work, we present a simulation model of society as a network of interacting agents subject to regulation of their economic activities, with varying degrees of enforcement. Each agent’s compliance with regulation is modeled as a string of bits, which also governs the probability of connection with other agents. Each agent has an initial share of the total wealth that changes over the course of transactions. At each simulation step, the poorest agent takes action to achieve a wealth change at the expense of its first neighbors in the network. Non-conformity to regulation is punished with a probability parameter representing the strength of regulatory enforcement. Our results suggest that regulation has the benefit of reducing wealth inequality but also the disadvantage of increasing job instability, which could lead to lower wealth production in the real world. Our analysis indicates a possible method for choosing an optimal level of regulatory enforcement.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141715541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unquenched—a memoir on non-equilibrium dynamics of quantum many-body systems: honoring Amit Dutta 未被征服--量子多体系统非平衡动力学回忆录：纪念阿米特-杜塔
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-07-15 DOI: 10.1140/epjb/s10051-024-00740-1
Shraddha Sharma, Tanay Nag, Atanu Rajak, Souvik Bandyopadhyay, Sourav Bhattacharjee, Somnath Maity, Utso Bhattacharya
{"title":"Unquenched—a memoir on non-equilibrium dynamics of quantum many-body systems: honoring Amit Dutta","authors":"Shraddha Sharma,&nbsp;Tanay Nag,&nbsp;Atanu Rajak,&nbsp;Souvik Bandyopadhyay,&nbsp;Sourav Bhattacharjee,&nbsp;Somnath Maity,&nbsp;Utso Bhattacharya","doi":"10.1140/epjb/s10051-024-00740-1","DOIUrl":"10.1140/epjb/s10051-024-00740-1","url":null,"abstract":"<p>This short review explores the physics journey of Professor Amit Dutta, illuminating his collaborative contributions with students and peers. We mainly focus on standard approaches to understanding non-equilibrium quantum dynamics and ground-state criticality using quantum informatic measures like ground-state fidelity, the Loschmidt echo and/or the decoherence factor. Using Floquet theory as a tool, we also discuss the dynamics of hard-core bosonic chain, shedding light on the phenomenon of dynamical localization and different analytically approachable limits of Floquet theory. The review further extends to probe the physics of topological phase transitions in driven/quenched systems, where we mainly focus on the non-equilibrium response of topological systems and topological state preparation. Finally, we also discuss late-time quantum dynamics leading to the thermalization of open and closed systems, where we review contemporary approaches to the applicability of thermodynamic principles in microscopic quantum systems and the macroscopic emergence of statistical mechanics in driven/quenched ergodic systems. Throughout this memoir, Professor Amit Dutta’s important scientific contributions are mentioned for their impact on advancing our understanding of quantum dynamics and statistical mechanics.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 7","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141711911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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