Ain Shams Engineering Journal最新文献_第7页

An estimation approach on material intensities and global warming potential of Turkish residential stock 土耳其住宅存量的材料强度和全球变暖潜力的估计方法

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-04 DOI: 10.1016/j.asej.2025.103725

Melek Elif Somer

引用次数: 0

A Rothe-Chebyshev collocation algorithm for the hyperbolic telegraphic type equations with variable coefficients 变系数双曲电报型方程的Rothe-Chebyshev配置算法

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-04 DOI: 10.1016/j.asej.2025.103720

Mohammad Izadi , Samad Noeiaghdam , H.M. Ahmed

{"title":"A Rothe-Chebyshev collocation algorithm for the hyperbolic telegraphic type equations with variable coefficients","authors":"Mohammad Izadi , Samad Noeiaghdam , H.M. Ahmed","doi":"10.1016/j.asej.2025.103720","DOIUrl":"10.1016/j.asej.2025.103720","url":null,"abstract":"<div><div>We construct a semi-discretized spectral approach for the second-order telegraphic-type equations with Dirichlet or Neumann boundary conditions. The successive method of Rothe is first employed for the temporal discretization procedure to transform the model equations into a system of boundary value problems. Subsequently, the spectral matrix procedure utilizing the shifted modified Chebyshev polynomials (SMCPs) is formulated for the spatial variable. The family of discrete solutions obtained by the hybrid Rothe-SMCPs algorithm is demonstrated to exhibit uniform convergence to the continuous solution of order <span><math><mi>O</mi><mrow><mo>(</mo><mi>Δ</mi><mi>τ</mi><mo>+</mo><msup><mrow><mi>R</mi></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup><mo>)</mo></mrow></math></span>. In this context, Δ<em>τ</em> signifies the time step, while <em>R</em> represents the number of SMCPs employed in the approximation procedure. Simulation experiments are carried out to highlight the strong agreement between the numerical results and theoretical predictions. The numerical results utilizing a larger time-step size exhibit greater accuracy compared to the computational values available in existing research works.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 11","pages":"Article 103720"},"PeriodicalIF":5.9,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988382","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}

引用次数: 0

Safety assessment for different crest raising scenarios of earth dams 土坝不同顶升方案的安全性评价

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-02 DOI: 10.1016/j.asej.2025.103684

Doaa A. EL-Molla , Murat Kilit

引用次数: 0

Effects of temperature changes on the thermomechanical behavior and interface stress of longitudinal connected slab track 温度变化对纵向连接板坯轨道热力学行为和界面应力的影响

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-02 DOI: 10.1016/j.asej.2025.103719

Xuhao Cui , Yapeng Liu , Hongbin Xu , Hong Xiao , Yihao Chi , Shaolei Wei , Yanliang Du

{"title":"Effects of temperature changes on the thermomechanical behavior and interface stress of longitudinal connected slab track","authors":"Xuhao Cui , Yapeng Liu , Hongbin Xu , Hong Xiao , Yihao Chi , Shaolei Wei , Yanliang Du","doi":"10.1016/j.asej.2025.103719","DOIUrl":"10.1016/j.asej.2025.103719","url":null,"abstract":"<div><div>In the context of modern railway systems, ensuring the structural integrity and longevity of longitudinal connected slab tracks under variable environmental conditions is paramount. This study aims to address the critical gap in understanding how diurnal temperature variations affect the deformation and interface integrity of such tracks, specifically within the framework of the China Railway Track System II (CRTS II). Employing a sophisticated three-dimensional model and leveraging the cohesive zone model (CZM) for simulating interface bonding behaviors, the research meticulously evaluates the temperature profiles, thermal deformations, and interface stresses of the slab track under daily thermal fluctuations. Notable findings include the observation of significantly higher temperature gradients in summer, with peak positive gradients approximately twice those of negative gradients. The analysis reveals pronounced deformation near the slab edges—arching due to positive gradients and warping under negative gradients, with arching deformation magnitudes substantially exceeding those of warping. Interface stress distribution proved to be non-uniform, with the highest stress concentrations near the slab edges reaching up to 0.094 MPa at 13:00. Seasonally, summer presents the greatest challenge regarding thermal deformation, interface stress, and damage, underscoring the necessity for enhanced monitoring and maintenance strategies during high daytime temperatures. The investigation concludes with the finding that minor interlayer bonding damage predominantly occurs at the track edges, yet does not escalate to full bonding failure or extensive cracking, thus preserving the structural integrity overall.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 11","pages":"Article 103719"},"PeriodicalIF":5.9,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925437","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}

引用次数: 0

Exploring shallow water wave phenomena: A fractional approach to the Whitham-Broer-Kaup-Boussinesq-Kupershmidt system 探索浅水波浪现象：whitham - broer - kap - boussinesq - kupershmidt系统的分数方法

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-01 DOI: 10.1016/j.asej.2025.103700

Tianyong Han , Yueyong Jiang , Hongguang Fan

引用次数: 0

Secure optical cryptographical transmission of solitons to fractal fractional Kairat model by novel approach 基于分形分数型Kairat模型的孤子安全光学密码传输新方法

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-01 DOI: 10.1016/j.asej.2025.103690

Muhammad Idrees Afridi

引用次数: 0

The sustainable future of cities under uncertainty: identifying key factors of adaptive urban resilience in Yazd, Iran 不确定性下城市的可持续未来：确定伊朗亚兹德适应性城市韧性的关键因素

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-01 DOI: 10.1016/j.asej.2025.103732

Ali Naderi, Kamal Khoshnevis

{"title":"The sustainable future of cities under uncertainty: identifying key factors of adaptive urban resilience in Yazd, Iran","authors":"Ali Naderi, Kamal Khoshnevis","doi":"10.1016/j.asej.2025.103732","DOIUrl":"10.1016/j.asej.2025.103732","url":null,"abstract":"<div><div>Despite the focus of previous studies on the static aspects of urban resilience, a significant gap remains in understanding its adaptive dynamics under uncertainty. This study seeks to identify the key factors influencing Adaptive Urban Resilience (AUR) in Yazd, Iran, through a hybrid methodological framework comprising Delphi, MICMAC (Matrix of Crossed Impact Multiplications Applied to a Classification), and Monte Carlo simulation. A total of 52 indicators across eight urban resilience dimensions were evaluated. The results indicate that the efficiency of climate change adaptation mechanisms (EN7) had the highest influence score (98.00), positioning it as a strategic leverage point for system-wide adaptation. Land-use change (PH4) with a score of 92.99, and geopolitical risks (P4) with 91.99, also emerged as top drivers of systemic transformation. In contrast, environmental pollution (EN1) and green space accessibility (EN2) were identified as highly unstable variables, necessitating flexible and adaptive planning. Overall, the findings underscore systemic instability driven by interlinked physical, political, and environmental factors. The proposed framework offers actionable insights for integrated and forward-looking urban resilience planning in arid, heritage-rich cities.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 11","pages":"Article 103732"},"PeriodicalIF":5.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925439","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}

引用次数: 0

Stability and Hopf bifurcation analysis of a delayed malware mutation model for wireless rechargeable sensor networks with energy constraints 具有能量约束的无线可充电传感器网络延迟恶意软件突变模型的稳定性和Hopf分岔分析

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-01 DOI: 10.1016/j.asej.2025.103697

Haoyu Wang , J.F. Gómez Aguilar , Ghaus ur Rahman , Zizhen Zhang

{"title":"Stability and Hopf bifurcation analysis of a delayed malware mutation model for wireless rechargeable sensor networks with energy constraints","authors":"Haoyu Wang , J.F. Gómez Aguilar , Ghaus ur Rahman , Zizhen Zhang","doi":"10.1016/j.asej.2025.103697","DOIUrl":"10.1016/j.asej.2025.103697","url":null,"abstract":"<div><div>With the rapid progression in the field of information technology, the security of wireless sensor networks (WSNs) becomes an alarming issue around the globe. This research presents an innovative malware propagation model for wireless rechargeable sensor networks (WRSNs), including virus mutation and two specific temporal delays: a charging delay (<span><math><msub><mrow><mi>ς</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>) and a temporary vaccination period delay (<span><math><msub><mrow><mi>ς</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>). In contrast to other models, our proposed approach accurately reflects the real-time dynamics of energy-constrained WRSNs by incorporating a fifth compartment for low-energy nodes and implementing unidirectional malware mutation. Utilizing linear stability and Hopf bifurcation analyses, we establish explicit criteria for the system's transition from stability to periodic oscillations. The incorporation of delay parameters clarifies essential thresholds for the occurrence of Hopf bifurcation. In contrast to Liu et al. (2020), who focused solely on charging delay and omitted global stability analysis, our enhanced model integrates two fundamental reproduction numbers, energy limitations, and dual delays, thereby facilitating more precise prediction and control of malware propagation. We additionally demonstrate global stability utilizing a Lyapunov functional and support our theoretical results with extensive numerical simulations. A stepwise implementation algorithm is also included to facilitate realistic deployment in IoT contexts. Our technique, in comparison to previous models, provides a delay reduction of up to 35%, increased resilience against mutated malware, and prolonged sustainable operation under energy limitations, rendering it extremely suitable for safe real-world WRSNs.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 11","pages":"Article 103697"},"PeriodicalIF":5.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921447","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}

引用次数: 0

Analysis of the impact of damage rate on the performance of orange fruit harvesting robot 破损率对橙子收获机器人性能的影响分析

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-09-01 DOI: 10.1016/j.asej.2025.103735

Sadaf Zeeshan , Tauseef Aized , Fahid Riaz

{"title":"Analysis of the impact of damage rate on the performance of orange fruit harvesting robot","authors":"Sadaf Zeeshan , Tauseef Aized , Fahid Riaz","doi":"10.1016/j.asej.2025.103735","DOIUrl":"10.1016/j.asej.2025.103735","url":null,"abstract":"<div><div>Reducing damage rates is paramount for optimizing the efficiency of fruit harvesting robots and advancing their journey towards commercial viability. Despite the crucial role that damage rates play in determining fruit quality and marketability, there is a notable lack of comprehensive and in-depth studies analyzing this aspect, especially within the context of fruit harvesting robots. Most research tends to prioritize metrics such as success rate and accuracy of fruit picking, leaving the examination of damage rates relatively overlooked. This study fills this gap by conducting a thorough examination of the factors contributing to damage rates in fruit harvesting robots, including the causes of damage, the types and sizes of bruises incurred, and the impact of occlusion, illumination conditions, and end effector orientation. Additionally, the research investigates strategies for minimizing damage rates, offering insights into optimizing fruit harvesting techniques to reduce potential damage. Occlusion, illumination, and gripper angle were found to significantly influence fruit damage. Specifically, a 10 % increase in occlusion raised damage by 1.18 %, a 100 Lumen/m<sup>2</sup> increase in illumination reduced damage by 10.5 %, and deviation from the optimal 90° gripper angle increased damage by 1.8 % per 10° shift. Overall, proper fruit orientation reduced damage by 40 %, minimal occlusion by 36 %, and optimal illumination by 25 %. A multiple linear regression model explained the variance in damage rate (R2 = 0.924) and achieved a low RMSE of 1.85 %, demonstrating high predictive accuracy and validating the model’s reliability in quantifying the influence of harvesting parameters. By investigating these aspects and exploring strategies for minimizing damage, the study aims to advance fruit harvesting robotics and contribute to the successful commercialization of this technology.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 11","pages":"Article 103735"},"PeriodicalIF":5.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925438","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}

引用次数: 0

Experimental and computational analysis of circular eccentric venturi meters: Discharge coefficients and flow regimes 圆形偏心文丘里仪表的实验和计算分析：流量系数和流动状态

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-08-27 DOI: 10.1016/j.asej.2025.103727

M.S. Karthik , P.Siva Kota Reddy , Tapankumar Trivedi , Asha Rajiv , Madhu Chennabasappa , Fehmi Gamaoun

{"title":"Experimental and computational analysis of circular eccentric venturi meters: Discharge coefficients and flow regimes","authors":"M.S. Karthik , P.Siva Kota Reddy , Tapankumar Trivedi , Asha Rajiv , Madhu Chennabasappa , Fehmi Gamaoun","doi":"10.1016/j.asej.2025.103727","DOIUrl":"10.1016/j.asej.2025.103727","url":null,"abstract":"<div><div>In this present study, experimental and numerical analysis on circular eccentric Venturi meters were carried out. An experimental discharge coefficient of 0.969 was determined for a beta ratio of 0.5 and 6.25 mm eccentricity. A computational fluid dynamics simulation investigated the behavior of the meter at different Reynolds numbers and eccentric heights. The results agreed with literature data and validated the proposed computational methodology. It was observed that increasing the eccentric distance had no significant impact on the discharge coefficient. The coefficient exhibited a strong correlation with the flow regime, decreasing from 0.979 to 0.186 as the Reynolds number decreased from 100,000 to 1. However, the coefficient decreased significantly as the Reynolds number decreased. The estimated combined standard uncertainty in the discharge coefficient was ± 2.6 %, with an expanded uncertainty of ± 5.2 % at a 95 % confidence level. These findings could improve industrial flow measurements through a better eccentric Venturi meter design.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 11","pages":"Article 103727"},"PeriodicalIF":5.9,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908922","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}

引用次数: 0