Physica Scripta最新文献_第6页

Percolation of conditional dependency clusters based on edge-coupled interdependent networks 基于边缘耦合相互依存网络的条件依存簇的循环

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67ad

Yanli Gao, Haibo Yu, liu jun, Jie Zhou

{"title":"Percolation of conditional dependency clusters based on edge-coupled interdependent networks","authors":"Yanli Gao, Haibo Yu, liu jun, Jie Zhou","doi":"10.1088/1402-4896/ad67ad","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67ad","url":null,"abstract":"\u0000 Considering the existence of multiple edge dependencies in realistic interdependent networks, we propose a model of edge-coupled interdependent networks with conditional dependency clusters (EINCDCs). In this model, the edges in network A depend on the edges in dependency clusters of size $m$ in network B. If the failure rate of edges within the dependency clusters in network B exceeds the failure tolerance $alpha$, the corresponding edges in network A that depend on those clusters in network B will fail accordingly. By adopting the self-consistent probabilities approach, a theoretical analytical framework is established to quantitatively address this model. Specifically, we study the robustness of the system verified with numerical simulations in the effect of the cluster size and failure tolerance under random attacks on systems composed of two networks A and B constructed with Random Regular (RR), Erdős-Rényi (ER) and Scale Free (SF) model. Our results show that both networks A and B undergo a first-order or hybrid phase transition when the dependency cluster size does not exceed 2. However, when the cluster size of dependency clusters exceeds 2, a non-monotonic behavior is observed. In particular, when the failure tolerance is the range from 0 to 0.5, the robustness of the system weakens with the growing in the number of dependency clusters of size 2. While, this tendency reverses when the failure tolerance is in the range from 0.5 to 1. Moreover, we observe that due to the asymmetric interdependency between the two networks, network B always undergoes first-order phase transition, whereas network A could exhibit different types of phase transitions, which depends on the size of dependency clusters. In addition, the failure tolerance may have opposite effects on the two networks with the growing of dependency cluster sizes. The conclusions of the study may provide useful implications and enrich the understanding in the robustness of edge-coupled interdependent networks.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"18 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141802863","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

Artificial Bee Colony Optimization Algorithm with Full Dimensional Updating Strategy and Its Application 采用全维更新策略的人工蜂群优化算法及其应用

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67b4

Yuangang Li, Wu Deng

{"title":"Artificial Bee Colony Optimization Algorithm with Full Dimensional Updating Strategy and Its Application","authors":"Yuangang Li, Wu Deng","doi":"10.1088/1402-4896/ad67b4","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67b4","url":null,"abstract":"\u0000 For the low accuracy and slow convergence speed of artificial bee colony(ABC) algorithm in solving complex optimization problems, an improved artificial bee colony(ABC) algorithm based on the new full dimensional updating ABC/best /1 strategy, namely FNABC was proposed in this paper. In the FNABC, for the low efficiency of one-dimensional search, the full dimensional updating search strategy and ABC/best /1 strategy were combined to design a new full dimensional updating ABC/best/1 strategy, which expanded the search space, improved the mining ability and search efficiency. Then, a new evolutionary phase is designed to balance the global search ability and local mining ability to avoid falling into local optimum and improve the convergence accuracy. Finally, the FNABC is compared with eight state-of-the-art ABC variants such as AABC, iqABC, MEABC, ABCVSS, GBABC, DFSABC, MABC-NS, MGABC in solving 12 complex functions. All functions have obtained the best optimal values among 9 algorithms. Additionally, FNABC is applied to solve a real-world train operation adjustment problem. The experiment results indicate that the FNABC has better optimization ability, scalability and robustness. It obtains the ideal train operation adjustment results.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"47 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141803853","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

A MIMO Antenna Array Featuring Dual Wideband and High Gain for 5G NR n257/n258/n260/n261 Bands Applications 面向 5G NR n257/n258/n260/n261 频段应用的双宽带高增益 MIMO 天线阵列

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67ab

A. Hmamou, Fatima kiouach, Sudipta Das, M. El Ghzaoui, Tanvir Islam, B. T. P. Madhav

{"title":"A MIMO Antenna Array Featuring Dual Wideband and High Gain for 5G NR n257/n258/n260/n261 Bands Applications","authors":"A. Hmamou, Fatima kiouach, Sudipta Das, M. El Ghzaoui, Tanvir Islam, B. T. P. Madhav","doi":"10.1088/1402-4896/ad67ab","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67ab","url":null,"abstract":"\u0000 This article introduces the development of a Multi-Input Multi-Output (MIMO) antenna array specifically designed for 5G millimeter-wave (mm-wave) communication systems. The suggested MIMO configuration consists of four antenna arrays, each comprising two elements arranged evenly, operating at 26 GHz and 37 GHz with a physical size of 43 mm × 32.5 mm × 0.8 mm using a Rogers RT/Duroid 5880 substrate. The proposed MIMO configuration provides dual bands, with frequency bands extending from 23.8 to 30 GHz (IBW= 6.2 GHz) and 32.5 to 41 GHz (IBW= 8.5 GHz), accompanied by high gains of around 18.5 dB for the first band and 16.4 dB for the second band. The designed antenna also shows broad circular polarization with 3 dB Axial Ratio Bandwidth (ARBW) of 4.75 GHz, ranging from 25.05 to 29.8 GHz. A physical prototype has been fabricated for the proposed 4 port MIMO antenna array and tested to verify the results acquired from simulations. The comparison between simulation and measurement results in terms impedance and radiation parameters such as S-parameters, isolation, gain, axial ratio (AR), efficiency, radiation patterns, and various necessary MIMO metrics demonstrates a strong alignment. This antenna covers various 5G New Radio (NR) application bands such as 28 GHz n257 (26.50-29.50 GHz), 26 GHz n258 (24.25-27.50 GHz), 28 GHz n260 (37-40 GHz) and 28 GHz n261 (27.50-28.35 GHz) utilized across different countries including Canada, Australia, China, France, Germany, India, Italy, Japan, South Korea, United Kingdom, and United States of America.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"31 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804441","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

Bessel beams generation with biphase transition of vanadium dioxide metasurface 二氧化钒超表面双相转变产生贝塞尔光束

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67b5

Hu Bo, Zhijian Wang, Zhifang Qiu, Xinning Yu, Xiaogang Wang, Kaikai Huang, Mingli Sun, Bijun Xu

引用次数: 0

Reduction of the deceleration phase to mitigate the negative effect of hydrodynamic instabilities in direct-drive ICF implosions 减少减速阶段以减轻直接驱动集成电路框架内爆中流体动力不稳定性的负面影响

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67b7

M. Temporal, A. R. Piriz, B. Canaud, Rafael Ramis

{"title":"Reduction of the deceleration phase to mitigate the negative effect of hydrodynamic instabilities in direct-drive ICF implosions","authors":"M. Temporal, A. R. Piriz, B. Canaud, Rafael Ramis","doi":"10.1088/1402-4896/ad67b7","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67b7","url":null,"abstract":"\u0000 In the deceleration phase of an Inertial Confinement Fusion capsule implosion Rayleigh-Taylor hydrodynamic instability can affect or even quench the ignition and thermonuclear burn wave propagation. This instability tends to mix the inner hot plasma with the cold and dense plasma shell providing a mixing layer where nuclear fusion reactions are inhibited. The 1D hydrodynamic code Multi-IFE has been used to simulate the implosion of a direct-drive high-gain laser-capsule design and the temporal evolution of the average radius and thickness of the mixing layer have been estimated. To mimic the effect of the reduced reaction rate the fuel reactivity in the mixing layer has been artificially set to zero thus inhibiting the burn wave propagation throughout it nullifying the energy gain. In order to overcome this negative effect is proposed the addition of secondary short and powerful laser pulse that would reduce the duration of the deceleration phase, which in turn get smaller the thickness of the mixing layer. A study has been performed to identify the optimal secondary laser pulse that allows recover the high energy gain.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"36 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141805142","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

Size-dependent nonlinear free vibration of magneto-electro-elastic nanobeams by incorporating modified couple stress and nonlocal elasticity theory 结合修正的耦合应力和非局部弹性理论，研究磁电弹性纳米梁随尺寸变化的非线性自由振动

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67b6

Yang Zhou, Yufang Zheng, Feng Wang, Changping Chen

{"title":"Size-dependent nonlinear free vibration of magneto-electro-elastic nanobeams by incorporating modified couple stress and nonlocal elasticity theory","authors":"Yang Zhou, Yufang Zheng, Feng Wang, Changping Chen","doi":"10.1088/1402-4896/ad67b6","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67b6","url":null,"abstract":"\u0000 Magneto-Electro-Elastic (MEE) Composites, as an innovative functional material blend, are composed of multiple materials, boasting exceptional strength, rigidity, and an extraordinary magneto-electric interaction effect. This paper establishes a nonlocal modified couple stress (NL-MCS) magneto-electro-elastic nanobeam dynamic model. To accurately capture the intricate influences of scale effects on nanostructures, This model meticulously examines scale effects from two distinct perspectives: leveraging nonlocal elasticity theory to elucidate the softening phenomena in nanostructures stemming from long-range particle interactions, and employing modified couple stress theory to reveal the hardening effects attributed to the rotational behavior of particles within the structure. By incorporating Von Karman geometric nonlinearity, Reddy's third-order shear deformation theory and Maxwell's equations, the governing equations for the nonlinear free vibration of MEE nanobeams are derived using Hamilton's principle. Finally, a two-step perturbation method is employed to solve these equations. Two-step perturbation method disintegrates the solution process into two stages, iteratively approximating and refining the solution, thereby progressively unraveling the intricate details and enhancing the precision of the solution in a systematic manner. Finally, the nonlinear free vibration behavior of MEE nanobeams is explored under the coupled magnetic-electric-elastic fields, with a focus on the effects of various factors that including length scale parameters, nonlocal parameters, Winkler-Pasternak coefficients, span-to-thickness ratios, applied voltages, and magnetic potentials.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"26 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141802939","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

Nuclear Acoustic Envelope Soliton in a Relativistically Degenerate Magneto-Rotating Stellar Plasma 相对论退化磁旋转恒星等离子体中的核声包络孤子

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67ae

Swarniv Chandra, Gobinda Manna, Deepsikha Mahanta

{"title":"Nuclear Acoustic Envelope Soliton in a Relativistically Degenerate Magneto-Rotating Stellar Plasma","authors":"Swarniv Chandra, Gobinda Manna, Deepsikha Mahanta","doi":"10.1088/1402-4896/ad67ae","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67ae","url":null,"abstract":"\u0000 The study explores a model called Relativistic Degenerate Magneto-Rotating Quantum Plasma (RDMRQP), which comprises a static heavy nucleus, an inertial non-degenerate light nucleus, and warm non-relativistic or ultra-relativistic electrons. The focus is on observing the emergence of Nucleus-Acoustic Envelope Solitons (NAESs). Using the reductive perturbation method, a Nonlinear Schrödinger Equation (NLSE) is derived to characterize the properties of NAESs. We have analysed the Peregrine breather soliton solution. The investigation reveals that the temperature of warm degenerate species, plasma system's rotational speed, and the presence of heavy nucleus species can alter the fundamental features (height and width) of NAESs in the WDMRQP system. The study emphasizes the existence of only positive NA wave potential. Additionally, a phase plane analysis is conducted to gain a deeper understanding of the parametric dependencies. Through detailed mathematical and numerical analysis, the study avoids overloading with complex mathematics while demonstrating parametric dependence via phase portrait analysis. The research augments the envelop soliton model with breather mode solutions and discusses modulation instability using the Benjamin-Feir Index, highlighting the significance of solitons in star formation. Envelop solitons, stable waves within stars and proto-stars, influence energy transport and stellar evolution, playing a crucial role in the accretion process and formation of stable structures. Key findings include the effects of various parameters on NAESs' generation and propagation in which non-relativistic and ultra-relativistic electrons support NAESs, with amplitude and width influenced by temperature, rotational frequency, inclination angle, and the presence of a static heavy nucleus. The research is applicable to hot white dwarfs and neutron stars, suggesting further exploration of quantum effects and non-planar or arbitrary amplitude NAESs.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"35 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141806113","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 E-nose system for identification and quantification of hazardous gas mixtures using a combined strategy of CNNs and attentional mechanisms 使用 CNN 和注意机制组合策略识别和量化危险气体混合物的电子鼻系统

Physica Scripta Pub Date : 2024-07-24 DOI: 10.1088/1402-4896/ad671d

Yaning Yang, Xiuling Wang, Lin Zhao, Zhen Li, Yanhui Sun

{"title":"An E-nose system for identification and quantification of hazardous gas mixtures using a combined strategy of CNNs and attentional mechanisms","authors":"Yaning Yang, Xiuling Wang, Lin Zhao, Zhen Li, Yanhui Sun","doi":"10.1088/1402-4896/ad671d","DOIUrl":"https://doi.org/10.1088/1402-4896/ad671d","url":null,"abstract":"\u0000 The chemical industry generates a broad spectrum of hazardous gases, presenting significant challenges for conventional detection methods due to their diverse chemical properties and low concentration levels. E-nose systems, employing sensor arrays, offer significant potential for the determination of gas mixtures. This study presents a novel E-nose algorithm, CNN-ECA, which integrated CNNs and attention mechanisms to improve the recognition accuracy of E-nose systems. By integrating the attention mechanism module into CNN's convolutional operations, the algorithm emphasizes critical feature information. Three hazardous gases (ammonia, methanol, and acetone) and their mixtures were chosen as target gases. CNNs were combined with various attention mechanism networks (SENet, ECA, and CBAM) to construct models, which were then employed to train and evaluate data collected from the sensor array. The results were compared with traditional network models (KNN, SVM, and CNN). Experimental findings indicated that the prediction performance of CNN models combined with attention mechanism networks surpassed that of traditional network models. Particularly, the CNN-ECA network model demonstrated the highest performance in both qualitative and quantitative analyses. This study presents a promising solution for mixed gas detection by synergizing CNN and attention mechanism networks, thereby enhancing the accuracy and reliability of mixed gas measurements. Moreover, capitalizing on the lightweight architecture of the CNN-ECA model, transfer learning techniques were employed to adapt it for deployment on the Raspberry Pi hardware platform. This facilitates the development of a real-time E-nose system for gas detection.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"59 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141806985","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

Mathematical analysis using fractional operator to study the dynamics of dengue fever 利用分数算子进行数学分析，研究登革热的动态变化

Physica Scripta Pub Date : 2024-07-24 DOI: 10.1088/1402-4896/ad671b

Manisha Meena, Mridula Purohit, Shyamsunder K

引用次数: 0

Investigation of conjunctivitis adenovirus spread in human eyes by using bifurcation tool and numerical treatment approach 利用分叉工具和数值处理方法调查结膜炎腺病毒在人眼中的传播情况

Physica Scripta Pub Date : 2024-07-24 DOI: 10.1088/1402-4896/ad62a5

Faisal Javed, Aqeel Ahmad, Ali Hasan Ali, E. Hıncal, Ayesha Amjad

{"title":"Investigation of conjunctivitis adenovirus spread in human eyes by using bifurcation tool and numerical treatment approach","authors":"Faisal Javed, Aqeel Ahmad, Ali Hasan Ali, E. Hıncal, Ayesha Amjad","doi":"10.1088/1402-4896/ad62a5","DOIUrl":"https://doi.org/10.1088/1402-4896/ad62a5","url":null,"abstract":"\u0000 In order to investigate the dynamics of the system, a mathematical model must be created to comprehend the dynamics of various prevalent diseases worldwide. The purpose of this investigation is to explore the early identification and treatment of conjunctivitis adenovirus by introducing vaccination methods for asymptomatic individuals. A mathematical model is constructed with the aim of strengthening the immune system. The ABC operator is then utilized to convert the model into a fractionally ordered one. The developed system is analyzed with analytical solutions by employing Sumudu transforms, including convergence analysis. The boundedness and uniqueness of the model are investigated using Banach space, which are key properties of such epidemic models. The uniqueness of the system is confirmed to ensure it has a unique solution. The stability of the newly constructed SEVIR system is investigated both qualitatively and statistically, and the system’s flip bifurcation has been verified. The developed system is examined through a Lyapunov function-based local and global stability study. The solution to the system is found using the Atangana-Toufik technique, a sophisticated method for reliable bounded solutions, employing various fractional values. Error analysis has also been conducted for the scheme. Simulations have been carried out to observe the real behavior and effects of the conjunctivitis virus, confirming that individuals with a strong immune response can recover without medication during the acute stage of infection. This helps to understand the real situation regarding the control of conjunctivitis adenovirus after early detection and treatment by introducing vaccination measures due to the strong immune response of the patients. Such investigations are useful for understanding the spread of the disease and for developing control strategies based on the justified outcomes.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"4 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141809288","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