Chinese Journal of Physics最新文献_第9页

A computer-aided study of methimazole adsorption onto a tailored silicon carbide nanocage for assessing a potential drug delivery system 计算机辅助研究甲巯咪唑在定制碳化硅纳米笼上的吸附，用于评估潜在的药物输送系统

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-08 DOI: 10.1016/j.cjph.2025.05.008

Mohamed J. Saadh , Chou-Yi Hsu , Hanan H. Ahmed , Ammar K. Wabdan , Mohamed Mohany , Salim S. Al-Rejaie , Mahmoud Mirzaei , Filipa Mascarenhas-Melo

{"title":"A computer-aided study of methimazole adsorption onto a tailored silicon carbide nanocage for assessing a potential drug delivery system","authors":"Mohamed J. Saadh , Chou-Yi Hsu , Hanan H. Ahmed , Ammar K. Wabdan , Mohamed Mohany , Salim S. Al-Rejaie , Mahmoud Mirzaei , Filipa Mascarenhas-Melo","doi":"10.1016/j.cjph.2025.05.008","DOIUrl":"10.1016/j.cjph.2025.05.008","url":null,"abstract":"<div><div>A tailored silicon carbide (SiC) fullerene-like nanocage was used in this work based on the implementation of an iron atom as a dopant system for the adsorption of methimazole (MZOL) drug. Computer-aided density functional theory (DFT) calculations were done to explore the potential use of such a tailored nanocage as a potential drug delivery system regarding the development of a customized drug delivery system. Structural and electronic specifications were evaluated for the optimized systems yielding the formation of MZOL@SiC complexes. Additionally, a significant role of the doped iron atom was found for the formation of MZOL@FeC, MZOL@SiFe, and MZOL@Fe models with a higher favorability for MZOL@SiFe. Reasonable strengths of complexes in both of vacuum and water phases in addition to the electronic specifications indicated a possibility of proposing a potential MZOL drug delivery system for MZOL along with the molecular adsorption and detection features.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 142-149"},"PeriodicalIF":4.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115588","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

The effect of the rectangular and sawtooth piecewise onsite terms on the wave transmission in the one-dimensional discrete nonlinear Schrödinger lattices 矩形和锯齿状分段现场项对一维离散非线性Schrödinger晶格中波传播的影响

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-07 DOI: 10.1016/j.cjph.2025.05.005

D. Haji Taghi Tehrani , M. Solaimani

引用次数: 0

Piston problem for the modified Chaplygin Euler equations 修正Chaplygin Euler方程的活塞问题

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-07 DOI: 10.1016/j.cjph.2025.04.024

Yuanjin Wang, Meixiang Huang

引用次数: 0

Grain boundary phenomena in soft photonic crystals of liquid-crystalline blue phase II 液晶蓝相软光子晶体中的晶界现象2

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-06 DOI: 10.1016/j.cjph.2025.04.019

Hung-Chang Jau , Chun-Wei Chen , Ting-Mao Feng , I-Chen Lin , Chie-Tong Kuo , Tsung-Hsien Lin

引用次数: 0

Computational and statistical analysis of wall shear stress role in assessing rupture risk of ICA saccular aneurysms 壁剪应力在ICA囊状动脉瘤破裂风险评估中的计算与统计分析

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-06 DOI: 10.1016/j.cjph.2025.05.003

Mei Bie , MingChen Chu , Li-Cai Zhao

{"title":"Computational and statistical analysis of wall shear stress role in assessing rupture risk of ICA saccular aneurysms","authors":"Mei Bie , MingChen Chu , Li-Cai Zhao","doi":"10.1016/j.cjph.2025.05.003","DOIUrl":"10.1016/j.cjph.2025.05.003","url":null,"abstract":"<div><div>In this article, comprehensive assessing rupture risk in intracranial internal carotid artery (ICA) saccular aneurysms are done by computational and statistical approaches. Hemodynamic study of 36 saccular aneurysms (ruptured and unruptured) were done via computational fluid dynamics and consequently, these hemodynamic features are analyzed via statistical methods to find important connections between rupture risk and these obtained hemodynamic parameters. In this work, the range of significant factors of wall shear stress (WSS) and pressure is fully compared. The potential connections between these factors and aneurysm rupture are evaluated by Weibull statistical model. The spatial distribution of these parameters was charted across the aneurysm sac surface to pinpoint regions with an elevated risk of rupture. Results revealed that that while Mean might not differ significantly between ruptured and unruptured groups, Max WSS tends to be 15 % higher in unruptured cases. The data of Min WSS shows that ruptured cases show a 17 % lower Min WSS. There is a greater spread in ruptured cases, with extreme high-value outliers.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 399-411"},"PeriodicalIF":4.6,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189991","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

Lattice boltzmann method for mixed convection with non-uniform and fractal Al2O3/water nanofluid in differently vertical moving lid cavities 不同垂直运动盖腔中非均匀分形Al2O3/水纳米流体混合对流的晶格玻尔兹曼方法

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-04 DOI: 10.1016/j.cjph.2025.02.023

Dwesh K. Singh , Rajan Kumar , Vinod Kumar Venkiteswaran

{"title":"Lattice boltzmann method for mixed convection with non-uniform and fractal Al2O3/water nanofluid in differently vertical moving lid cavities","authors":"Dwesh K. Singh , Rajan Kumar , Vinod Kumar Venkiteswaran","doi":"10.1016/j.cjph.2025.02.023","DOIUrl":"10.1016/j.cjph.2025.02.023","url":null,"abstract":"<div><div>Mesoscale Lattice Boltzmann simulation is used to solve the mixed convection of Al<sub>2</sub>O<sub>3</sub>/H<sub>2</sub>O nanofluid medium in two-sided lid-driven cavities. Flow governing equations like Navier-Stokes and energy equations in the form of particle distribution functions have been solved by the Lattice Boltzmann Method (LBM). The effect of fractal dimension (minimum to maximum diameter) and non-uniform diameter of Al<sub>2</sub>O<sub>3</sub> nanoparticles for different concentrations in water inside the cavities has been considered. Based on the vertical walls motion, three different cases of lid-driven problems have been considered. First, only the left wall is moving in the upward direction (Case-I), second, when the vertical walls are moving in the same direction (Case-II), and third, when the vertical walls are moving in the opposite direction (Case-III). Results are depicted in the form of streamline, isotherms, Nusselt number, and vertical velocity variation. A significant decrease in Nusselt number is found for the range of mean nanoparticle diameter from 1 nm to 20 nm. Increasing the fractal dimension of Al<sub>2</sub>O<sub>3</sub> increases the heat transfer in all three different cases. Fractal distribution R = 0.001 has the capability of a lower heat transfer rate than at R = 0.007. Quantitatively a maximum of 51 % increment in <span><math><mover><mrow><mi>N</mi><mi>u</mi></mrow><mo>‾</mo></mover></math></span> for Case III is observed in comparison to Case I at Ri = 0.1 for the same parameters. This increment is 46 % for Case II in comparison to Case I, which is observed. Case-III with a higher value of fractal distribution and smaller mean diameter of nanoparticles is suggested for better heat transfer.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 1259-1277"},"PeriodicalIF":4.6,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902528","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

A novel piecewise unsaturated asymmetric coupled tri-stable stochastic resonance method and its application in enhanced detection 一种新的分段不饱和不对称耦合三稳定随机共振方法及其在增强检测中的应用

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-03 DOI: 10.1016/j.cjph.2025.04.030

Xiaoxiao Huang, Gang Zhang, Lianbing Xu, Lin He

{"title":"A novel piecewise unsaturated asymmetric coupled tri-stable stochastic resonance method and its application in enhanced detection","authors":"Xiaoxiao Huang, Gang Zhang, Lianbing Xu, Lin He","doi":"10.1016/j.cjph.2025.04.030","DOIUrl":"10.1016/j.cjph.2025.04.030","url":null,"abstract":"<div><div>Stochastic resonance (SR) has been extensively explored as an effective technique for weak signal detection, relying on the principle of enhancing weak signal components through the introduction of an appropriate amount of noise to improve signal detectability. To address the output saturation issue of classical tri-stable stochastic resonance (CTSR) system, we introduce a novel piecewise unsaturated asymmetric coupled tri-stable stochastic resonance (PUACTSR) system, incorporating three improvements: unsaturation, asymmetry and coupling. First, the steady-state probability density (SPD) and the power spectral amplification factor (SA) are derived using adiabatic approximation theory, and the effects of system parameters on performance are analyzed. Second, the signal-to-noise ratio gain (SNRG) is utilized as an index to assess the system’s enhancement. Numerical simulations and detection of simulated periodic signals demonstrate that the PUACTSR system outperforms both the CTSR and piecewise unsaturated asymmetric time-delayed tri-stable stochastic resonance (PUATDTSR) systems. Finally, the proposed method employs a quantum genetic algorithm (QGA) for parameter optimization, effectively eliminating the randomness and low accuracy associated with manual tuning in computational settings. The results show that for detecting outer-ring fault signals, the PUACTSR system achieves a 0.14 dB improvement over the PUATDTSR system, a 2.31 dB improvement over the symmetric case, and a 4.76 dB improvement over the CTSR system. Furthermore, the power spectral curves show reduced noise interference, demonstrating superior detection performance compared to the other systems. This study highlights the theoretical significance of the PUACTSR system for bearing fault diagnosis and its potential for practical engineering applications.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 122-141"},"PeriodicalIF":4.6,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107022","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

Customized filamentation in nonlinear metamaterials 非线性超材料的定制化灯丝

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-03 DOI: 10.1016/j.cjph.2025.04.028

A.K. Shafeeque Ali , Mustafa Bayram , M.B. Basim

引用次数: 0

Stochastic soliton solutions in birefringent fibers: Analysis of the Biswas–Arshad equation with multiplicative white noise 双折射光纤中的随机孤子解：带乘性白噪声的Biswas-Arshad方程分析

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-03 DOI: 10.1016/j.cjph.2025.04.027

Akhtar Hussain , Tarek F. Ibrahim , Abaker A. Hassaballa , Abeer M. Alotaibi , Fathea M. Osman Birkea , M.Sh. Yahya

{"title":"Stochastic soliton solutions in birefringent fibers: Analysis of the Biswas–Arshad equation with multiplicative white noise","authors":"Akhtar Hussain , Tarek F. Ibrahim , Abaker A. Hassaballa , Abeer M. Alotaibi , Fathea M. Osman Birkea , M.Sh. Yahya","doi":"10.1016/j.cjph.2025.04.027","DOIUrl":"10.1016/j.cjph.2025.04.027","url":null,"abstract":"<div><div>Stochastic partial differential equations are essential in many scientific and engineering disciplines. This study investigates optical stochastic solitons and other exact stochastic solutions in birefringent fibers governed by the Biswas–Arshad equation with multiplicative white noise. By utilizing a new extended hyperbolic function method and generalized exponential rational function method, a diverse range of soliton solutions is obtained. These solutions exhibit either symmetric or anti-symmetric spatial properties, contributing to a deeper understanding of wave dynamics in nonlinear optical systems. Stochastic periodic oscillating nonlinear waves, stochastic kink-wave profiles, stochastic multiple soliton profiles, stochastic singular solutions, stochastic mixed singular solutions, stochastic mixed hyperbolic solutions, stochastic periodic patterns with anti-troughs and anti-peaked crests, stochastic mixed periodic solutions, stochastic mixed complex solitary shock solutions, stochastic mixed shock singular solutions, stochastic mixed trigonometric solutions, and stochastic periodic solutions. Using symbolic computation tools such as Mathematica 14.1 or Maple, the newly derived soliton solutions were validated by substituting them back into the original system. Parameter constraints were analyzed to ensure the existence of these stochastic solutions. Additionally, the selected solutions are illustrated graphically to highlight their physical characteristics and demonstrate the underlying wave dynamics.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 175-200"},"PeriodicalIF":4.6,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115586","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

Artificial neural network approach to study the impact of gravity modulation on magneto-convection of Jeffrey fluid in a porous media 用人工神经网络方法研究重力调制对多孔介质中杰弗里流体磁对流的影响

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-05-02 DOI: 10.1016/j.cjph.2025.04.026

Suman Shekhar , Ravi Ragoju , Dhananjay Yadav

{"title":"Artificial neural network approach to study the impact of gravity modulation on magneto-convection of Jeffrey fluid in a porous media","authors":"Suman Shekhar , Ravi Ragoju , Dhananjay Yadav","doi":"10.1016/j.cjph.2025.04.026","DOIUrl":"10.1016/j.cjph.2025.04.026","url":null,"abstract":"<div><div>The influence of gravity modulation on magneto-convection in Jeffrey fluid is analyzed. A weak nonlinear analysis is employed, utilizing a power series expansion method where disturbances are expressed as power series. Heat transfer is measured using the mean Nusselt number, <span><math><mover><mrow><mi>N</mi><mi>u</mi></mrow><mo>¯</mo></mover></math></span>. The study explores the application of machine learning techniques to predict the stability for different parameters. The Levenberg–Marquardt algorithm is used to train artificial neural networks on simulated data to understand the impact of magnetic fields on stability. The mean Nusselt number is estimated using the trained neural network. Regression <span><math><mi>R</mi></math></span>, histogram, and mean square error are used in the analysis. The developed artificial neural network model demonstrates its dependability because of its remarkable accuracy during the training, validation, and testing. The values of <span><math><mi>R</mi></math></span> for Chandrasekhar number, <span><math><mi>Q</mi></math></span>, Jeffrey parameter, <span><math><mi>λ</mi></math></span> and Magnetic Prandtl number, <span><math><mrow><mi>P</mi><msub><mrow><mi>r</mi></mrow><mrow><mi>m</mi></mrow></msub></mrow></math></span> are 99.93%, 94.22%, and 99.50% respectively. MSE curve is dropping, which is a indicator that the network is analyzing the training data and adjusting its weight to get the best fit. The values of best validation performance of Chandrasekhar number <span><math><mi>Q</mi></math></span>, Jeffrey parameter and Magnetic Prandtl number <span><math><mrow><mi>P</mi><msub><mrow><mi>r</mi></mrow><mrow><mi>m</mi></mrow></msub></mrow></math></span> are 3.6782E−06, 3.9345E−10, and 1.3218E−04 respectively.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 104-121"},"PeriodicalIF":4.6,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107021","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