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Ouzo液滴的声悬浮动力学研究

中国科学：物理学、力学、天文学 2021年第5期51卷 147-156页

作者：冯乙婷姬晓亮张永建 muhammad Muntazir mehdi 臧渡洋西北工业大学物理科学与技术学院超常条件材料物理与化学教育部重点实验室西安710129 中国科学院物理研究所北京100190 西安文理学院机械与材料工程学院西安710065

Ouzo效应是一种自发乳化现象,被广泛应用于化工、生物医药以及新材料制备等多个领域.为探究声场和无容器条件对Ouzo效应的影响机制,本文将Ouzo转变与声悬浮过程相结合,通过蒸发和液滴凝并两种不同的方式引发声悬浮液滴中的Ouzo效应,对... 详细信息

Ouzo效应是一种自发乳化现象,被广泛应用于化工、生物医药以及新材料制备等多个领域.为探究声场和无容器条件对Ouzo效应的影响机制,本文将Ouzo转变与声悬浮过程相结合,通过蒸发和液滴凝并两种不同的方式引发声悬浮液滴中的Ouzo效应,对比研究玻璃基底和声悬浮无容器条件下的Ouzo效应及其动力学过程.研究发现,液滴的蒸发会诱发Ouzo相变与微滴形核,微液滴的长大过程主要由扩散主导.声悬浮条件下,液滴的凝并会引发Ouzo转变并形成两端不对称的奇异液滴,这是液滴内部声场流动和声辐射压力的共同作用导致,表明声悬浮液滴的内部流动对Ouzo转变具有显著影响.这项工作为发展无容器条件下的乳化反应技术及相关材料制备提供了重要借鉴.

关键词： Ouzo效应声悬浮液滴蒸发凝并

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巴基斯坦学生汉语结构词“的、地、得”偏误及教学研究

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巴基斯坦学生汉语结构词“的、地、得”偏误及教学研究

作者： Syed muhammad Baqir mehdi 四川师范大学

学位级别：硕士

Regression analysis of squeezing-induced hybrid nanofluid flow in Darcy-Forchheimer porous medium

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 193-208页

作者： K.muhammad M.SARFRAZ Department of Humanities and Sciences School of Electrical Engineering and Computer Science National University of Sciences and Technology Department of Mathematics Quaid-i-Azam University

This article presents a mathematical model addressing a scenario involving a hybrid nanofluid flow between two infinite parallel plates. One plate remains stationary, while the other moves downward at a squeezing velocity. The space between these plates contains a Darcy-Forchheimer porous medium. A mixture of water-based fluid with gold(Au) and silicon dioxide(Si O2) nanoparticles is formulated. In contrast to the conventional Fourier's heat flux equation, this study employs the Cattaneo-Christov heat flux equation. A uniform magnetic field is applied perpendicular to the flow direction, invoking magnetohydrodynamic(MHD) effects. Further, the model accounts for Joule heating, which is the heat generated when an electric current passes through the fluid. The problem is solved via NDSolve in MATHEMATICA. Numerical and statistical analyses are conducted to provide insights into the behavior of the nanomaterials between the parallel plates with respect to the flow, energy transport, and skin *** findings of this study have potential applications in enhancing cooling systems and optimizing thermal management strategies. It is observed that the squeezing motion generates additional pressure gradients within the fluid, which enhances the flow rate but reduces the frictional drag. Consequently, the fluid is pushed more vigorously between the plates, increasing the flow velocity. As the fluid experiences higher flow rates due to the increased squeezing effect, it spends less time in the region between the plates. The thermal relaxation, however, abruptly changes the temperature, leading to a decrease in the temperature fluctuations.

关键词： convective boundary condition Darcy-Forchheimer medium hybrid nanofluid Joule heating magnetohydrodynamic (MHD) numerical solution O175.2 O361 regression analysis squeezing flow

Modification of polypropylene separator with multifunctional layers to achieve highly stable sodium metal anode

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Journal of Energy Chemistry 2025年第2期101卷 223-232页

作者： Aadil Nabi Chishti Sikandar Iqbal muhammad Ali Moazzam Ali Samia Aman Hamid Hussain muhammad Yousaf Yinzhu Jiang Future Science Research Institute ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University School of Materials Science and Engineering Zhejiang University School of Chemistry Zhejiang University

Separator modification is an effective approach to suppress dendrite growth to realize high-energy sodium metal batteries（SMBs） in practical applications,however,its success is mainly subject to surface ***,a separator with multifunctional layers composed of N-doped mesoporous hollow carbon spheres（HCS） as the inner layer and sodium fluoride（NaF） as the outer layer on commercial polypropylene separator（PP） is proposed（PP@HCS-NaF） to achieve stable cycling in *** the molecular level,the inner HCS layer with a high content of pyrrolic-N induces the uniform Na+flux as a potential Na+redistributor for homogenous deposition,whereas its hollow mesoporous structure offers nanoporous buffers and ion channels to regulate Na+ion distribution and uniform *** outer layer（NaF） constructs the NaF-enriched robust solid electrolyte interphase layer,significantly lowering the Na+ions diffusion *** from these merits,higher electrochemical performances are achieved with multifunctional double-layered PP@HCS-NaF separators compared with single-layered separators（***@HCS or PP@NaF） in *** Na‖Cu half-cell with PP@HCS-NaF offers stable cycling（280 cycles）with a high CE（99.6%）,and Na‖Na symmetric cells demonstrate extended lifespans for over 6000 h at 1 mA cm-2with a progressively stable overpotential of 9 ***,in Na‖NVP full-cells,the PP@HCS-NaF separator grants a stable capacity of ～81 mA h g-1after 3500 cycles at 1 C and an impressive rate capability performance(～70 mA h g-1at 15 C).

关键词： Enhanced cyclic stability Multifunctional layers NaF-enriched SEI layer Separator modification Sodium metal batteries

Improving the Position Accuracy and Computational Efficiency of UAV Terrain Aided Navigation Using a Two-Stage Hybrid Fuzzy Particle Filtering Method

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Computers, Materials & Continua 2025年第1期82卷 1193-1210页

作者： Sofia Yousuf muhammad Bilal Kadri College of Engineering Karachi Institute of Economics&TechnologyKarachi75190Pakistan College of Computer and Information Sciences Prince Sultan UniversityRiyadh11586Saudi Arabia

Terrain Aided Navigation(TAN)technology has become increasingly important due to its effectiveness in environments where Global Positioning System(GPS)is *** recent years,TAN systems have been extensively researched for both aerial and underwater navigation ***,many TAN systems that rely on recursive Unmanned Aerial Vehicle(UAV)position estimation methods,such as Extended Kalman Filters(EKF),often face challenges with divergence and instability,particularly in highly non-linear *** address these issues,this paper proposes and investigates a hybrid two-stage TAN positioning system for UAVs that utilizes Particle *** enhance the system’s robustness against uncertainties caused by noise and to estimate additional system states,a Fuzzy Particle Filter(FPF)is employed in the first *** approach introduces a novel terrain composite feature that enables a fuzzy expert system to analyze terrain non-linearities and dynamically adjust the number of particles in *** design allows the UAV to be efficiently localized in GPS-denied environments while also reducing the computational complexity of the particle filter in real-time *** the second stage,an Error State Kalman Filter(ESKF)is implemented to estimate the UAV’s *** ESKF is chosen over the conventional EKF method because it is more suitable for non-linear *** results demonstrate that the proposed fuzzy-based terrain composite method achieves high positional accuracy while reducing computational time and memory usage.

关键词： Sensor fusion fuzzy logic particle filter composite feature terrain aided navigation

China’s Influence in South and Southeast Asia

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China Today 2018年第1期67卷 36-36页

作者： muhammad mehdi Pakistan Muslim League N

The Belt and Road Initiative is set to launch a new era of trade and partner- ship between China and ASEAN coun- tries, which will be extended further to Africa and Europe. China has an increas- ing influence in South... 详细信息

关键词： China’s Influence in South and Southeast Asia ASEAN

Oversampling-Enhanced Feature Fusion-Based Hybrid ViT-1DCNN Model for Ransomware Cyber Attack Detection

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Computer Modeling in Engineering & Sciences 2025年第2期142卷 1667-1695页

作者： muhammad Armghan Latif Zohaib Mushtaq Saifur Rahman Saad Arif Salim Nasar Faraj Mursal muhammad Irfan Haris Aziz Department of Computer and Information System Cleveland State UniversityOhio44115USA Department of Electrical Electronics and Computer SystemsCollege of Engineering and TechnologyUniversity of SargodhaSargodha40100Pakistan Electrical Engineering Department College of EngineeringNajran UniversityNajran61441Saudi Arabia Department of Mechanical Engineering College of EngineeringKing Faisal UniversityAl Ahsa31982Saudi Arabia Department of Mechanical Industrial and Energy System EngineeringUniversity of SargodhaSargodha40100Pakistan

Ransomware attacks pose a significant threat to critical infrastructures,demanding robust detection *** study introduces a hybrid model that combines vision transformer(ViT)and one-dimensional convolutional neural network(1DCNN)architectures to enhance ransomware detection *** common challenges in ransomware detection,particularly dataset class imbalance,the synthetic minority oversampling technique(SMOTE)is employed to generate synthetic samples for minority class,thereby improving detection *** integration of ViT and 1DCNN through feature fusion enables the model to capture both global contextual and local sequential features,resulting in comprehensive ransomware *** on the UNSW-NB15 dataset,the proposed ViT-1DCNN model achieved 98%detection accuracy with precision,recall,and F1-score metrics surpassing conventional *** approach not only reduces false positives and negatives but also offers scalability and robustness for real-world cybersecurity *** results demonstrate the model’s potential as an effective tool for proactive ransomware detection,especially in environments where evolving threats require adaptable and high-accuracy solutions.

关键词： Ransomware attacks cybersecurity vision transformer convolutional neural network feature fusion encryption threat detection

Single-cell and spatial omics:exploring hypothalamic heterogeneity

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Neural Regeneration Research 2025年第6期20卷 1525-1540页

作者： muhammad Junaid Eun Jeong Lee Su Bin Lim Department of Biochemistry&Molecular Biology Ajou University School of MedicineSuwonSouth Korea Department of Biomedical Sciences Graduate School of Ajou UniversitySuwonSouth Korea Department of Brain Science Ajou University School of MedicineSuwonSouth Korea

Elucidating the complex dynamic cellular organization in the hypothalamus is critical for understanding its role in coordinating fundamental body functions. Over the past decade, single-cell and spatial omics technologies have significantly evolved, overcoming initial technical challenges in capturing and analyzing individual cells. These high-throughput omics technologies now offer a remarkable opportunity to comprehend the complex spatiotemporal patterns of transcriptional diversity and cell-type characteristics across the entire hypothalamus. Current single-cell and single-nucleus RNA sequencing methods comprehensively quantify gene expression by exploring distinct phenotypes across various subregions of the hypothalamus. However, single-cell/single-nucleus RNA sequencing requires isolating the cell/nuclei from the tissue, potentially resulting in the loss of spatial information concerning neuronal networks. Spatial transcriptomics methods, by bypassing the cell dissociation, can elucidate the intricate spatial organization of neural networks through their imaging and sequencing technologies. In this review, we highlight the applicative value of single-cell and spatial transcriptomics in exploring the complex molecular-genetic diversity of hypothalamic cell types, driven by recent high-throughput achievements.

关键词： cellular diversity hypothalamus multi-omics single-cell transcriptomics spatial transcriptomics

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Classification and progress of extraction technologies for nonferrous metal resources

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Science China Chemistry 2025年第2期68卷 458-474页

作者： Fangqin Cheng Na Zhou Nazeer muhammad Nouman Li Cui Caixia Yin Institute of Resources and Environmental Engineering State Environmental Protection Key Laboratory of Efficient Utilization of Coal Waste ResourcesShanxi UniversityTaiyuan 030006China Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Institute of Molecular ScienceShanxi UniversityTaiyuan 030006China

In recent years,the demand for strategic metal resources,essential for scientific and technological progress and industrial development,has *** a stable supply of these metals is critical to national security and the well-being of the *** global industrialization accelerates,the daily demand for nonferrous metals continues to ***,extracting and recovering strategic metals from low-grade raw materials,such as solid waste,has become crucial for maintaining their supply and economic ***,the extraction process is fraught with challenges,including mineral phase stability and complex *** review focuses on key strategic metals such as lithium,aluminum,gallium,and *** introduces and examines various methods for extracting nonferrous metals from different raw materials,including traditional mining technologies applied to low-grade solid *** also outlines future development opportunities and challenges in this field.

关键词： nonferrous metal extraction classification and progress