Results in Physics最新文献_第4页

Innovative mathematical correlations for estimating mono-nanofluids' density: Insights from white-box machine learning 估计单纳米流体密度的创新数学相关性：来自白盒机器学习的见解

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-10 DOI: 10.1016/j.rinp.2025.108248

Omid Deymi , Fahimeh Hadavimoghaddam , Saeid Atashrouz , Saptarshi Kar , Ali Abedi , Ahmad Mohaddespour , Mehdi Ostadhassan , Abdolhossein Hemmati-Sarapardeh

{"title":"Innovative mathematical correlations for estimating mono-nanofluids' density: Insights from white-box machine learning","authors":"Omid Deymi , Fahimeh Hadavimoghaddam , Saeid Atashrouz , Saptarshi Kar , Ali Abedi , Ahmad Mohaddespour , Mehdi Ostadhassan , Abdolhossein Hemmati-Sarapardeh","doi":"10.1016/j.rinp.2025.108248","DOIUrl":"10.1016/j.rinp.2025.108248","url":null,"abstract":"<div><div>The current research offers credible mathematical models solely for estimating mono-nanofluids' density (<em>ρ<sub>nf</sub></em>), which can be useful for thermal engineering calculations required by various industries and applications. Accordingly, a comprehensive data bank encompassing 4004 experimental data-points was utilized to execute two rigorous machine-learning techniques: Group Method of Data Handling (GMDH) and Gene Expression Programming (GEP). Subsequently, two high-accuracy correlations were fine-tuned based on the four independent variables: average nanoparticle diameter (<em>d<sub>np</sub></em>), nanoparticle mass concentration (<em>ϕ<sub>m</sub></em>), nanoparticle density (<em>ρ<sub>np</sub></em>), and base-fluid density (<em>ρ<sub>bf</sub></em>). Two variables pressure (<em>P</em>) and temperature (<em>T</em>), with rather minor impacts on the density of the mono-nanofluids under investigation, were excluded in the final correlations as a result of the modeling process and the intelligent operation of the machine-learning techniques. By performing multiple statistical and graphical analyses, comparative evaluations highlighted the superior performance and outstanding accuracy of the GEP-based correlation (with AAPRE=0.6614% and R<sup>2</sup>=0.9671). Moreover, sensitivity analysis and parametric trend assessments revealed that <em>ϕ<sub>m</sub></em> and <em>ρ<sub>bf</sub></em> were the most crucial variables affecting <em>ρ<sub>nf</sub></em> values, with relevancy factors of approximately 0.72 and 0.71, respectively. By considering the GEP-based correlation's outputs and applying the leverage statistical approach, a considerable portion (96.33%) of the total data-points was identified as valid data.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108248"},"PeriodicalIF":4.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

On the bosonic origin of the elastic constants of the solids 固体弹性常数的玻色子起源

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-09 DOI: 10.1016/j.rinp.2025.108250

Ulrich Köbler

{"title":"On the bosonic origin of the elastic constants of the solids","authors":"Ulrich Köbler","doi":"10.1016/j.rinp.2025.108250","DOIUrl":"10.1016/j.rinp.2025.108250","url":null,"abstract":"<div><div>It is shown that the elastic compliances, s<sub>ij</sub>, are defined, as the elastic stiffness constants, c<sub>ij</sub>, by bosons. The constants c<sub>ij</sub> are well-known to be given by the velocities of the sound waves, called here Debye-bosons. Sound waves are evidently elastic dipole radiation. The constants s<sub>ij</sub> will be shown to originate in a boson type that is identified as elastic quadrupole radiation. Consistent with the conclusion that the two elastic constants are defined by bosons is that they reach a (finite) maximum at the ordering temperature of the respective boson field. The maximum of the elastic compliances s<sub>ij</sub> at T<sub>m</sub> indicates, that the associated bosons order at the <u>m</u>elting <u>p</u>oint, T<sub>m</sub>. We will call these bosons, MP-bosons. The maximum of the constants c<sub>ij</sub> is at T = 0. As a consequence, the Debye boson field does not order at a finite temperature. Upon ordering, all MP-bosons condense in one energy state (Bose-Einstein condensation). This is the thermodynamically highest possible order. Additionally, ordered boson fields constrict themselves to the finite volume of a stationary unit. In magnetism, these ordered units are known as domains. The mosaic blocks are identified as the long-range ordered units, created upon ordering of the MP-bosons. Moreover, ordered boson fields attempt to assume the smallest possible volume (magnetostriction). The self-constriction of the ordered MP-boson field that compresses each mosaic block, has to be made responsible for the strong decrease of the lattice parameter below T<sub>m</sub> and for the cohesion of the solids up to T<sub>m</sub>.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108250"},"PeriodicalIF":4.4,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 plasmonic properties of gold-silver alloys for SPR biosensing applications 用于SPR生物传感的金银合金等离子体特性的理论研究

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-08 DOI: 10.1016/j.rinp.2025.108252

Innocent Kadaleka Phiri , Mohssin Zekriti

{"title":"Theoretical investigation of plasmonic properties of gold-silver alloys for SPR biosensing applications","authors":"Innocent Kadaleka Phiri , Mohssin Zekriti","doi":"10.1016/j.rinp.2025.108252","DOIUrl":"10.1016/j.rinp.2025.108252","url":null,"abstract":"<div><div>Surface Plasmon Resonance (SPR) arises from the light-induced excitation of free electrons near a metal surface, making it a key mechanism in biosensing applications. While gold and silver are the commonly used metals, gold-silver (Au-Ag) alloys have gained interest in SPR. However, the impact of different gold-to-silver composition ratios on SPR performance remains underexplored, complicating alloy selection for applications such as SPR biosensors. This study theoretically investigates the influence of Au-Ag alloy compositions on the Surface Plasmon Polariton (SPP) wave characteristics and SPR biosensor performance using the Transfer Matrix Method (TMM) and the Kretschmann configuration. Our findings suggest that specific alloy compositions can enhance sensitivity and propagation length, making them promising for high-performance biosensing applications. A proposed biosensor design incorporating an Au-Ag alloy, a CaF<sub>2</sub> glass prism, Black Phosphorus (BP) layers, and water as the sensing medium is discussed. Additionally, we outline the procedures and potential challenges associated with its practical implementation. This work contributes to advancing high-performance biosensing technologies and aligns with the Sustainable Development Goals (SDGs) 3 and 9 of the United Nations (UN).</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108252"},"PeriodicalIF":4.4,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Influence of rare earth Sm3+ doping on structural and magnetic properties of Ba2FeMoO6 double perovskite 稀土掺杂Sm3+对Ba2FeMoO6双钙钛矿结构和磁性能的影响

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-08 DOI: 10.1016/j.rinp.2025.108254

Z. Ghorbani, M.H. Ehsani

引用次数: 0

Quantum oscillations of bloch point in cylindrical ferromagnetic nanowire: Quasiclassical approach 圆柱形铁磁纳米线中斑点点的量子振荡：准经典方法

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-08 DOI: 10.1016/j.rinp.2025.108245

A.B. Shevchenko , O.V. Oliinyk , A.V. Minitskyi , M.Yu. Barabash

引用次数: 0

Large-scale molecular dynamics simulations of negative Poisson’s ratio in hydrogenated biphenylene 氢化联苯负泊松比的大尺度分子动力学模拟

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-06 DOI: 10.1016/j.rinp.2025.108251

Zhefeng Wang , Kai Chen , Youmin Xu , Zengjie Wang , Chong Qiao , Yuxiang Zheng , Rongjun Zhang , Liangyao Chen , Songyou Wang , Wan-Sheng Su

{"title":"Large-scale molecular dynamics simulations of negative Poisson’s ratio in hydrogenated biphenylene","authors":"Zhefeng Wang , Kai Chen , Youmin Xu , Zengjie Wang , Chong Qiao , Yuxiang Zheng , Rongjun Zhang , Liangyao Chen , Songyou Wang , Wan-Sheng Su","doi":"10.1016/j.rinp.2025.108251","DOIUrl":"10.1016/j.rinp.2025.108251","url":null,"abstract":"<div><div>This study was conducted to investigate the effect of hydrogenation on the Poisson’s ratio of biphenylene. By combining large-scale molecular dynamics simulations with a stochastic structure generation method, this study revealed that the Poisson’s ratio of biphenylene can shift from positive to negative as the degree of hydrogenation is adjusted. Specifically, at lower hydrogenation levels, the Poisson’s ratio decreases with increasing hydrogenation, eventually exhibiting a negative Poisson’s ratio at 40% to 50% hydrogenation. However, as hydrogenation progresses further, the negative Poisson’s ratio effect diminishes. The occurrence of negative Poisson’s ratio in hydrogenated biphenylene is attributed to a pronounced ripple effect induced by hydrogenation. Under tensile strain, the suppression of ripples reduces contraction in the direction perpendicular to the applied stretch. Moreover, the findings highlight a strong correlation between the ripple effects in the structure and the percentage of hydrogenation. These results demonstrate that hydrogenation serves as an effective approach to modulate the Poisson’s ratio of biphenylene, enabling its transition from positive to negative.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108251"},"PeriodicalIF":4.4,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Non-Fourier heat transfer analysis of sandwich conical shells with GPLs reinforced face sheets and porous core under moving heat flux 移动热流密度下gpl增强面板多孔芯夹层锥形壳的非傅立叶传热分析

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-05 DOI: 10.1016/j.rinp.2025.108240

Yasin Heydarpour , Parviz Malekzadeh , Hanxing Zhu , Morteza Mohammadzaheri

{"title":"Non-Fourier heat transfer analysis of sandwich conical shells with GPLs reinforced face sheets and porous core under moving heat flux","authors":"Yasin Heydarpour , Parviz Malekzadeh , Hanxing Zhu , Morteza Mohammadzaheri","doi":"10.1016/j.rinp.2025.108240","DOIUrl":"10.1016/j.rinp.2025.108240","url":null,"abstract":"<div><div>In this work, as a first attempt, the thermal behavior of nanocomposite sandwich conical shells under internal axisymmetric moving heat flux based on the non-Fourier heat transfer is investigated. In order to capture the influences of the finite heat wave speed, the hyperbolic heat transfer equation is used. The face sheets of the nanocomposite sandwich shell are made of graphene platelets (GPLs) reinforced polymer matrix. The core layer is fabricated from a GPLs reinforced porous composite material. In both core layer and face sheets, GPLs have uniform distribution and random orientation. Through a two-dimensional layerwise approach, the differential quadrature method (DQM) and the nonuniform rational basis spline (NURBS) curves based multi-step technique are employed to discretize the governing equations in the spatial and temporal domains, respectively. The performance of the present method is demonstrated by performing convergence study and comparing the results in the limit cases with those reported in literature. Following the approach validation, parametric studies are carried out to elucidate the influences of heat flux speed, porosity distribution and amounts, GPLs weight fractions and the shell-thickness-to-length ratio on the thermal responses of the sandwich conical shells under investigation. The results show that the speed of moving heat flux and GPLs weight fractions have significant effects on the thermal responses of the shells. But the porosity distribution and amounts have less effect on the thermal behavior of the shell. In addition, the increase of the heat flux speed decreases the traveled distance by the heat wave front and the increase of the weight fraction of GPLs increases the heat wave speed.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108240"},"PeriodicalIF":4.4,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Nanoindentation of nickel film by magnetron sputtering ion plating on sapphire: Molecular dynamics simulations and experiments 蓝宝石表面磁控溅射离子镀镍膜纳米压痕：分子动力学模拟与实验

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-05 DOI: 10.1016/j.rinp.2025.108233

Shilong Sun, Bin You, Tianlei Dong, Yusheng Sui, Rongchuan Lin, Shasha Wei

{"title":"Nanoindentation of nickel film by magnetron sputtering ion plating on sapphire: Molecular dynamics simulations and experiments","authors":"Shilong Sun, Bin You, Tianlei Dong, Yusheng Sui, Rongchuan Lin, Shasha Wei","doi":"10.1016/j.rinp.2025.108233","DOIUrl":"10.1016/j.rinp.2025.108233","url":null,"abstract":"<div><div>Magnetron sputtering deposition of metals on sapphire (<span><math><mi>α</mi></math></span>-Al<sub>2</sub>O<sub>3</sub>) has emerged as significant research focus in advanced manufacturing due to its critical role in enhancing sapphire’s performance. This study examines the effects of varying negative biases (60 V, 80 V, 100 V) and annealing treatments on the mechanical properties of Ni films deposited on sapphire. Molecular dynamics (MD) simulations and experimental validation based on results of deposition experiments. With increasing negative bias reduces the grain size of the Ni film and decreases the (111)/(100) phase ratio. After annealing, residual stress within film is released, resulting in increased grain size and a higher content of (100) phase. MD simulations reveal that higher negative biases lead to increased dislocation density in Ni film, with plastic deformation predominantly governed by Shockley and Stair-rod dislocations. After annealing, dislocation density decreases, and under 80 V and 100 V conditions, the emergence of Hirth dislocations facilitates earlier onset of plastic deformation. Differences in phase composition within Ni film cause atomic displacements during indentation to exhibit directionality, which diminishes after annealing. Furthermore, the von Mises strain initially decreases and then increases with rising negative bias. Notably, at 80 V, the film achieves an optimal balance of moderate grain size, low dislocation density, and controlled phase composition, minimizing von Mises strain and exhibiting the highest elastic modulus and hardness. The experimental findings align with MD simulation results based on the COMB3 potential, confirming the reliability of the simulations. This study provides theoretical insights into the mechanical behavior of nanocrystalline Ni films under mechanical loading.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108233"},"PeriodicalIF":4.4,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Scaling of energy and length for a two-dimensional classical system of charged particles under parabolic confinement 抛物约束下二维经典带电粒子系统能量和长度的标度

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-05 DOI: 10.1016/j.rinp.2025.108243

Orion Ciftja

引用次数: 0

Validity of the phenomenological model for magnetocaloric effects in MnFeP2/3Si1/3 MnFeP2/3Si1/3 中磁致效应现象学模型的有效性

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-01 DOI: 10.1016/j.rinp.2025.108231

Ahmed R. Galaly , Tahani R. Aldhafeeri , Sameh M. Elghnam , Mahmoud A. Hamad

{"title":"Validity of the phenomenological model for magnetocaloric effects in MnFeP2/3Si1/3","authors":"Ahmed R. Galaly , Tahani R. Aldhafeeri , Sameh M. Elghnam , Mahmoud A. Hamad","doi":"10.1016/j.rinp.2025.108231","DOIUrl":"10.1016/j.rinp.2025.108231","url":null,"abstract":"<div><div>Assessing the validity of the phenomenological model (PM) for the magnetocaloric effect (MCE) in MnFeP<sub>2/3</sub>Si<sub>1/3</sub> is the aim of this study. Our work confirms PM for conventional MCE by simulating the MCE of MnFeP<sub>2/3</sub>Si<sub>1/3</sub> at temperatures between 230 K and 310 K. Interestingly, there is a good degree of precision across the whole temperature range in the agreement between the simulated magnetic entropy change (10.1 J/kg.K) and the reported one. Additionally, MnFeP<sub>2/3</sub>Si<sub>1/3</sub>′s relative cooling power is evaluated to be 97 J/kg, and heat capacity change characterization is investigated. By reducing the time and effort required to calculate and measure MCE, these results imply that PM is a trustworthy model for investigating MCE in the sharp magnetic transition. Consequently, the PM is very useful for estimating the MCE of magnets, as the MnFeP<sub>2/3</sub>Si<sub>1/3</sub> sample has a sharp magnetic transition. Consequently, we believe that the PM can also be used for predicting MCE parameters for any magnetic transition.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108231"},"PeriodicalIF":4.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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