Ain Shams Engineering Journal最新文献

{"title":"Critical factors influencing post-disaster reconstruction: A quantitative analysis of Yemen’s recovery challenges","authors":"Husam. A.S. Al Mekhlefi,&nbsp;Jie Liu","doi":"10.1016/j.asej.2025.103538","DOIUrl":"10.1016/j.asej.2025.103538","url":null,"abstract":"<div><div>Yemen faces considerable obstacles in post-disaster reconstruction owing to political instability, budgetary limitations, and inefficiencies in disaster management. This article delineates and ranks the principal issues obstructing reconstruction initiatives, providing the inaugural complete examination of these challenges in Yemen. A thorough literature study identified 47 important elements that contribute to delays and failures in reconstruction. The elements were assessed through a survey of 51 seasoned engineers and prioritized using the Relative Importance Index (RII) into four categories: management, government, beneficiaries, and economic. The study delineates the 10 principal components that represent the foremost impediments to restoration, underscoring the want for improved governmental administration, dependable financial backing, and augmented community involvement. Addressing these issues can accelerate and improve the efficacy of reconstruction operations. The results offer pragmatic suggestions for policymakers and practitioners to enhance post-disaster reconstruction in Yemen and other areas encountering analogous difficulties.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103538"},"PeriodicalIF":6.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical and experimental analysis of thermal transfer for radial-shaped holed fins","authors":"Arkan Fawzi Saeed ,&nbsp;Noori Raad","doi":"10.1016/j.asej.2025.103529","DOIUrl":"10.1016/j.asej.2025.103529","url":null,"abstract":"<div><div>This study investigates heat characteristics transferred from a rectangular perforated fins, which are widely used in engineering applications for thermal management. The research focuses on the radial shaped perforation geometry effects on the fins thermal performance. Perforation is introduced to reduce the weight of the fins and improve thermal dispersion by increasing the ratio of exposed area to volume and promoting better airflow. A combination of experimental testing and CFD simulations is employed to examine parameters such as Nusselt number, overall thermal efficiency, and effectiveness. The results indicate that strategically placed perforations significantly improve heat transfer performance while reducing material usage by 16% of area. The experimental data closely matched the numerical results with an error of 3.99%. It has been found that the radial fin perforation had achieved a significant overall efficiency and effectiveness enhancement. Present work provides insights into optimizing perforation patterns for various applications, offering an effective solution for lightweight and high-performance heat transfer systems in automotive, aerospace, and electronic cooling industries.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103529"},"PeriodicalIF":6.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mathematical modeling and characteristics of automotive electric power steering systems: A state–of–the–art literature review","authors":"Tuan Anh Nguyen","doi":"10.1016/j.asej.2025.103516","DOIUrl":"10.1016/j.asej.2025.103516","url":null,"abstract":"<div><div>Electric Power Steering (EPS) systems offer several advantages over traditional steering mechanisms and are increasingly adopted in modern vehicles. The performance of an EPS system strongly depends on its assisted steering characteristic curves, which serve as reference signals for control algorithms. While many models and methods have been proposed to describe and analyze EPS systems, no comprehensive publication has systematically categorized and reviewed the dynamic models and assisted steering characteristics of these systems. This article addresses the research gap by presenting a thorough, up-to-date overview of automotive EPS systems. Specifically, we summarize and compare widely used EPS configurations’ structures, mathematical models, and application scopes. A key contribution of this work is the classification and analysis of various assisted steering characteristic curves, which are essential for optimizing control performance. These curves provide a helpful basis for researchers and engineers in designing optimal EPS system behaviors. To enhance practical accessibility, we also provide a summary table consolidating the main findings, allowing practitioners to reference the characteristics and models discussed quickly. This work’s distinctive contribution is its comprehensive integration of structural and performance-related features of EPS systems.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103516"},"PeriodicalIF":6.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of emergency medical low-carbon cold chain transportation routes considering hospital priority during an epidemic outbreak","authors":"Shouchen Liu","doi":"10.1016/j.asej.2025.103515","DOIUrl":"10.1016/j.asej.2025.103515","url":null,"abstract":"<div><div>At the beginning of 2020, during the sudden outbreak of the novel coronavirus in Wuhan, the hoarding, untimeliness, lack of transparency and unreasonable distribution of rescue medical cold chain materials also exposed the drawbacks of domestic medical logistics emergency distribution. Therefore, it is particularly important to study the optimization of the emergency medical cold chain material distribution routes mainly for hospitals. Firstly, the K-means clustering algorithm is used to classify the hospital priorities. Subsequently, this paper proposes two situations: shortage of goods and lack of goods, and constructs a path optimization model with the total cost as the objective function. Finally, the improved ant colony algorithm is adopted to solve the model. The results show that through simulation to verify the validity and rationality of the model, this method can effectively solve the truck routing problem of priority emergency allocation in hospitals.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103515"},"PeriodicalIF":6.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational-experimental investigation of radiations shielding characteristics for polymethyl methacrylate","authors":"Susan Shukur Noori ,&nbsp;Kadir Günoğlu ,&nbsp;Osman Günay ,&nbsp;Iskender Akkurt ,&nbsp;Ipek Atik","doi":"10.1016/j.asej.2025.103527","DOIUrl":"10.1016/j.asej.2025.103527","url":null,"abstract":"<div><div>This study explores the gamma radiation shielding properties of polymethyl methacrylate (PMMA) samples augmented with varying proportions of silicon carbide (SiC). The neutron radiation shielding properties were determined through theoretical calculations using specialized software (Phy-X/PSD). Experimental measurements were conducted utilizing a NaI(Tl) detector system, capturing gamma-ray energies emitted by some radiation sources (¹³⁷Cs and ⁶⁰Co) at 0.662, 1.173, and 1.332 MeV. To enhance result accuracy, a slender beam geometry was established with a collimator. Theoretical calculations of shielding parameters were conducted across an energy spectrum ranging from 0.015 to 15 MeV utilizing specialized software. Experimental linear attenuation coefficient outcomes facilitated the calculation of half and tenth layer thickness values, mean free path. Furthermore some parameters such as electron density and effective atomic number were derived using software alongside measurement results. Fast-neutron removal cross sections for neutron radiation were ultimately determined. This findings reveal an increase in LAC values with rising SiC ratio in PMMA, yet they exhibit a decrease with rising photon energy. Conversely, MFP, HVL, TVL, and d_Pb values escalate with energy increase, whereas they diminish with higher SiC ratios in PMMA. Theoretically calculated fast neutron removal cross sections augment with escalating SiC ratios. Comparison of gamma radiation shielding parameters, both experimental and theoretical, demonstrates a harmonious correlation between the two, affirming their reliability and congruence.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103527"},"PeriodicalIF":6.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An algorithmic approach to signed fuzzy graph integrity: Complexity, graph operations, and metro rail network applications","authors":"Chakaravarthy Sankar ,&nbsp;Chandran Kalaivani ,&nbsp;Mariappan Saravanan ,&nbsp;Ramalingam Sujatha","doi":"10.1016/j.asej.2025.103509","DOIUrl":"10.1016/j.asej.2025.103509","url":null,"abstract":"<div><div>This paper presents an algorithm to compute the integrity of a signed fuzzy graph by systematically evaluating vertex subsets, removing them, and analyzing the resulting connected components. Integrity is determined by computing the minimum sum of the fuzzy membership of the removed subset and the maximum fuzzy order among the remaining components. Additionally, this study explores the vertex integrity of signed fuzzy graphs under operations such as union, Cartesian product, and join. Integrity results for special graph operations are derived and illustrated with examples. The corona and pendant operations on signed fuzzy graphs are also introduced, along with their structural properties. Understanding graph integrity is essential for assessing network resilience, particularly in transportation systems. The proposed framework is applied to metro rail networks to demonstrate its practical significance in ensuring operational efficiency. Integrity values are computed using computational tools, providing insights into network robustness and failure resilience.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103509"},"PeriodicalIF":6.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of periodic wave soliton structure for the wave propagation in nonlinear low–pass electrical transmission lines through analytical technique","authors":"Mujahid Iqbal ,&nbsp;Jianqiao Liu ,&nbsp;Aly R. Seadawy ,&nbsp;Huda Daefallh Alrashdi ,&nbsp;Reem Algethamie ,&nbsp;Abeer Aljohani ,&nbsp;Ce Fu","doi":"10.1016/j.asej.2025.103506","DOIUrl":"10.1016/j.asej.2025.103506","url":null,"abstract":"<div><div>In the present research, the nonlinear electrical equation named low–pass electrical transmission lines (LPETLs) equation under examination through extended simple equation approach. The nonlinear LPETLs model having important implications in sciences and engineering such as communication and electronic engineering included system of signal distribution in cable television, connection system of radio receiver and transmitter and its antennas, computer networking connected system, routing call truck lines of telephone switching centers, high speed data buses in computers and many others. In the presenting research, we examined novel solitons with interesting structure such as periodic wave solitons, kink wave solitons, bright solitons, anti–kink wave solitons, dark solitons, mixed bright and dark solitons, periodic traveling and solitary waves. The physical structure of some explored results demonstrated by contour, two–dimensional and three–dimensional through numerical simulation with computational Mathematica software. These novel explored results prove that proposed approach in this research is more straightforward, effective, not difficult to use and efficient to the investigation of different nonlinear differential equations.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103506"},"PeriodicalIF":6.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative study of oblique stagnation point flow of MWCNT-Ag/blood and MWCNT/blood nanofluids due to shrinking surface","authors":"M.S. Abbas ,&nbsp;M. Qamar ,&nbsp;M. Khan ,&nbsp;S.M. Hussain","doi":"10.1016/j.asej.2025.103517","DOIUrl":"10.1016/j.asej.2025.103517","url":null,"abstract":"<div><div>Hybrid nanofluids improved the thermal characteristics and stability features of various applications including thermal efficiency systems, solar collectors, energy production, nuclear processes, and heat transfer properties. Motivated by above mentioned applications of hybrid nanofluids, the primary aim is to explore the heat transfer analysis through a comparative study of (MWCNT-Ag/blood) hybrid nanofluid and (MWCNT /blood) nanofluid near an oblique stagnation point flow with the impact of non-linear thermal radiation, variable thermal conductivity and non-uniform heat generation/absorption across a shrinking surface. The influence of suction, convective boundary condition are also under consideration. The governing flow problem is reformed into non-linear ODEs employing appropriate similarity variables. A suitable technique bvp4c built-in MATLAB function used for numerical solutions. A comprehensive analysis of distinct influential fluid factors against drag friction, Nusselt number, flow, and thermal transportation are examined graphically. The outcome shows that friction drag increases with the increment in suction parameter for both hybrid and monofluids for stable branch solutions. Furthermore, heat transportation rate rises with the addition of variable thermal conductivity and radiation factors for hybrid nanofluid and monofluid. It also observed that hybrid nanofluid boosted rapidly compared to a naonofluid, representing an improvement in thermal characteristics is more stable for hybrid nanofluid than monofluid. Additionally, increasing the temperature ratio factors shows an upsurge in thermal distribution profile.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103517"},"PeriodicalIF":6.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zeroth-order general Randić index for four new sum-graphs","authors":"Rauf Irshad ,&nbsp;Suha Wazzan","doi":"10.1016/j.asej.2025.103521","DOIUrl":"10.1016/j.asej.2025.103521","url":null,"abstract":"&lt;div&gt;&lt;div&gt;For molecular graphs, the topological indices (TIs) proved to be a bridge between graph theory and mathematical chemistry to understand and predict certain properties of underlying chemical substances. In chemical graph theory (CGT), for a (molecular) graph Γ, zeroth-order general Randić index is considered to be a prominent and comprehensive topological index represented as &lt;span&gt;&lt;math&gt;&lt;mmultiscripts&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;none&gt;&lt;/none&gt;&lt;mprescripts&gt;&lt;/mprescripts&gt;&lt;none&gt;&lt;/none&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/mmultiscripts&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;. Many prominent and useful indices are special cases of &lt;span&gt;&lt;math&gt;&lt;mmultiscripts&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;none&gt;&lt;/none&gt;&lt;mprescripts&gt;&lt;/mprescripts&gt;&lt;none&gt;&lt;/none&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/mmultiscripts&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;. For instance, for &lt;span&gt;&lt;math&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mfrac&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;/math&gt;&lt;/span&gt;, 2, and 3 we get inverse degree index (IDI) or modified total adjacency index, zeroth order Randić index &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mfrac&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;, first Zagreb index &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;, and forgotten index &lt;span&gt;&lt;math&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;, respectively. The TI &lt;span&gt;&lt;math&gt;&lt;mmultiscripts&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;none&gt;&lt;/none&gt;&lt;mprescripts&gt;&lt;/mprescripts&gt;&lt;none&gt;&lt;/none&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/mmultiscripts&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; has a myriad of applications in chemistry, such as estimating the structural dependence of alternant hydrocarbons on the &lt;em&gt;π&lt;/em&gt;-electron energy. In CGT, graph products provide a framework for generating new (molecular) graphs of our choice by combining two graphs under a specific binary operation. Adequate research has been conducted on numerous TIs, including &lt;span&gt;&lt;math&gt;&lt;mmultiscripts&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;none&gt;&lt;/none&gt;&lt;mprescripts&gt;&lt;/mprescripts&gt;&lt;none&gt;&lt;/none&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/mmultiscripts&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;, for F-sum graphs under the Cartesian product. In this paper, we derived the exact formulas of the &lt;span&gt;&lt;math&gt;&lt;mmultiscripts&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;none&gt;&lt;/none&gt;&lt;mprescripts&gt;&lt;/mprescripts&gt;&lt;none&gt;&lt;/none&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/mmultiscripts&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; for newly defined F-sum graphs based on the tensor product. We prove the accuracy and validity of our formulas by taking diverse pertinent examples. Researchers from cheminformatics can use our formulas of zeroth-order general Randić index for QSAR/QSPR stud","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103521"},"PeriodicalIF":6.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bi-directional virtual search algorithm for efficient and collision-free path planning in autonomous robots navigating static and dynamic environments","authors":"M.D. Yeshwanth Kumar,&nbsp;K. Rajchandar","doi":"10.1016/j.asej.2025.103526","DOIUrl":"10.1016/j.asej.2025.103526","url":null,"abstract":"<div><div>This study proposes an efficient and adaptable path-planning model for autonomous mobile robots operating in both static and dynamic grid-based environments. Initially, a collision-free grid map is constructed to represent the configuration space, ensuring accurate placement of obstacles and target coordinates. The robot navigates toward its goal through a dynamic decision-making algorithm that updates its movements based on real-time coordinate comparisons and environmental changes. Extensive experiments were conducted across multiple static and dynamic scenarios. The proposed model achieved a path efficiency improvement of 17.9 % and a computational time reduction of 23.4 % compared to traditional A* and Dijkstra’s algorithms. The success rate remained consistently above 96.5 % even in environments with moving obstacles. Key evaluation metrics, including path optimality, success rate, average computation time, and adaptability score, demonstrate the model’s superiority over benchmark methods. Overall, the proposed framework ensures robust, real-time path planning with minimal computational overhead, making it highly suitable for complex autonomous navigation tasks in uncertain environments.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 9","pages":"Article 103526"},"PeriodicalIF":6.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}