Ain Shams Engineering Journal最新文献_第2页

A doherty power amplifier design approach for matched transistor without simulation model 一种不需要仿真模型的匹配晶体管多赫蒂功率放大器设计方法

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-15 DOI: 10.1016/j.asej.2025.103796

Haotian Li , Zhijiang Dai , Zhenyu Li , Shuai Wang

引用次数: 0

An ecological assessment model of water retention based on regional differences in characteristic using remote sensing data 基于区域特征差异的遥感保水生态评价模型

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-15 DOI: 10.1016/j.asej.2025.103785

Lin Wu , Zewen Fu , Yabo Huang , Zhengwei Guo , Ning Li

{"title":"An ecological assessment model of water retention based on regional differences in characteristic using remote sensing data","authors":"Lin Wu , Zewen Fu , Yabo Huang , Zhengwei Guo , Ning Li","doi":"10.1016/j.asej.2025.103785","DOIUrl":"10.1016/j.asej.2025.103785","url":null,"abstract":"<div><div>Accurate assessment of Water Retention (WR), a critical ecosystem service, remains challenging due to regional heterogeneity. This study proposes the RD-WR model, a spatially explicit framework integrating regional differences (RD) to improve WR estimation. Leveraging remote sensing data, we develop two novel indicators (RC-Dif and EF-Dif) to quantify terrain and vegetation variability, alongside a boundary-adjustment metric (CRel) to account for cross-ecosystem dependencies. The model enhances InVEST Water Yield outputs by incorporating multi-source hydrologic data (precipitation, evapotranspiration) and DEM-derived landscape features. Validation in the Danjiangkou Ecological Reserve (2015 vs. 2020, contrasting humidity years) demonstrates that the RD-WR model outperforms conventional approaches (G-WR) in resolving fine-scale WR patterns, aligning closely with observed hydrologic gradients. Our findings highlight the importance of regionalized parameters in ecosystem service modeling, offering a potential framework for sustainable water resource management.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 12","pages":"Article 103785"},"PeriodicalIF":5.9,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145320935","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

Diversity of solitary wave structures in Kerr media: Analyzing the complex paraxial wave equation in fiber optic communication systems 克尔介质中孤立波结构的多样性：分析光纤通信系统中复杂的近轴波方程

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-14 DOI: 10.1016/j.asej.2025.103763

U. Younas , J. Muhammad , H.F. Ismael , Tukur Abdulkadir Sulaiman , Homan Emadifar , Karim K. Ahmed

{"title":"Diversity of solitary wave structures in Kerr media: Analyzing the complex paraxial wave equation in fiber optic communication systems","authors":"U. Younas , J. Muhammad , H.F. Ismael , Tukur Abdulkadir Sulaiman , Homan Emadifar , Karim K. Ahmed","doi":"10.1016/j.asej.2025.103763","DOIUrl":"10.1016/j.asej.2025.103763","url":null,"abstract":"<div><div>This study explores the paraxial nonlinear Schrödinger equation in Kerr media, a key model for optical fiber systems. Complex wave transformations reduce the model to a nonlinear ODE, enabling the generation of diverse solutions: bright, dark, bright-dark, and combined solitons, alongside periodic, hyperbolic, and exponential wave structures. Three novel techniques, namely the modified Riccati extended simple equation, the modified generalized exponential rational function, and the multivariate generalized exponential rational integral function methods, are used to find the solutions. Using symbolic computation tools like <em>Mathematica</em>, the generated soliton solutions have been confirmed by substituting them back into various relevant systems. Moreover, a variety of figures as well as their dynamics are included for the different parametric values. The proposed methods offer efficient and reliable approximations, demonstrating their utility for exploring complex nonlinear wave propagation and advancing higher-dimensional nonlinear science.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 12","pages":"Article 103763"},"PeriodicalIF":5.9,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145320938","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

Comprehensive evaluation of sustainable Self-Compacting concrete (SCC) with High-Density Polyvinyl Chloride (HDPVC) recycled pipes as partial coarse aggregate replacement 高密度聚氯乙烯（HDPVC）再生管替代部分粗骨料的可持续自密实混凝土（SCC）综合评价

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-14 DOI: 10.1016/j.asej.2025.103788

Meyyada Y. Alabdulhady , Kadhim Z. Naser , Muthana Sh. Mahdi , Ayman Moustafa

{"title":"Comprehensive evaluation of sustainable Self-Compacting concrete (SCC) with High-Density Polyvinyl Chloride (HDPVC) recycled pipes as partial coarse aggregate replacement","authors":"Meyyada Y. Alabdulhady , Kadhim Z. Naser , Muthana Sh. Mahdi , Ayman Moustafa","doi":"10.1016/j.asej.2025.103788","DOIUrl":"10.1016/j.asej.2025.103788","url":null,"abstract":"<div><div>This study explored the potential of recycled High-Density Polyvinyl Chloride (HDPVC) from scrap pipes as an environmentally friendly substitute for natural coarse aggregate in self-compacting concrete (SCC). incorporating fly ash as a supplementary cementitious material. The influence of varying HDPVC replacement levels (5 %, 10 %, 15 %, 20 %, and 25 %) by volume of natural coarse aggregate on the fresh, hardened, and durability characteristics of SCC was examined. The experimental results indicated satisfactory in passing ability, flowability, and segregation resistance for mixtures containing up to 25 % HDPVC. Optimal strength enhancement was observed at 10 % HDPVC replacement, resulting in a 20 %, 16 %, and 17 % improvement in compressive, splitting tensile, and flexural strength, respectively, at 28 days of curing relative to the reference mixture. Conversely, a subsequent decline in strength at higher levels occurred until it nearly equaled that of the control mixture. Furthermore, strong correlations of 0.9704 and 0.9117 were noted in comparison with the compressive strength with Schmidt rebound number and ultrasonic pulse velocity (UPV), respectively. SCC with HDPVC particles demonstrated superior resistance to sulfuric acid attack while maintaining adequate resistance to salt attack compared to reference mixture. However, significant weight and compressive strength losses were recorded at elevated temperature (450 °C), limiting the material’s application in such conditions. Based on the comprehensive evaluation of fresh, hardened, and durability properties, the SCC mixture with 10 % HDPVC replacement is advisable for general construction applications where enhanced mechanical performance and improved acid resistance are beneficial, excluding high-temperature environments due to observed material degradation.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 12","pages":"Article 103788"},"PeriodicalIF":5.9,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145320932","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

Study on the optimal damage model for directional detonation control of aimable warhead 可瞄准战斗部定向爆轰控制最优毁伤模型研究

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-13 DOI: 10.1016/j.asej.2025.103722

Chen Hong , Zha Bing-Ting , Zheng Zhen , Zhang He

{"title":"Study on the optimal damage model for directional detonation control of aimable warhead","authors":"Chen Hong , Zha Bing-Ting , Zheng Zhen , Zhang He","doi":"10.1016/j.asej.2025.103722","DOIUrl":"10.1016/j.asej.2025.103722","url":null,"abstract":"<div><div>To meet the detonation control requirements of the directional warhead in cooperation with the fuze, a detonation control modeling method based on laser/millimeter wave compound azimuth detection fuze is proposed to study the scattering rule of the warhead’s pre-formed fragments. The fragmentation law of the warhead was experimentally and numerically studied under different initiation conditions. Combined with the azimuth detection fuze, the appropriate target azimuth recognition method is designed, and the warhead detonation strategy under different detection modes is matched. A target vulnerability equivalent model is used to simulate, the effect of the matching relationship between the fuze delay and miss distance on the damage effect. The simulation and experiment results show that the eccentric 90° three-line initiation can make the warhead generate a 90° fragment directional gain region, and the maximum average flying velocity of the fragment in the region is 2002.81 m·s<sup>−1</sup>, which is 14.73 % higher than that of the central initiation. Compared with the traditional central point initiation fuze-warhead coordination, the damage probability of laser/millimeter wave azimuth detection fuze is increased by 8.2 %∼22.6 %. In the process of fuze-warhead coordination of directional warhead, a target damage probability calculation model with obvious physical significance is established by introducing parameters such as target miss distance and fuze delay.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 12","pages":"Article 103722"},"PeriodicalIF":5.9,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145320759","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

NST−YOLO: Improved YOLOv10 model for small target UAV detection NST−YOLO：用于小目标无人机探测的改进YOLOv10模型

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-11 DOI: 10.1016/j.asej.2025.103787

Junyao He , Wensheng Wang

{"title":"NST−YOLO: Improved YOLOv10 model for small target UAV detection","authors":"Junyao He , Wensheng Wang","doi":"10.1016/j.asej.2025.103787","DOIUrl":"10.1016/j.asej.2025.103787","url":null,"abstract":"<div><div>This paper proposes a UAV small target detection algorithm based on improved YOLOv10, aiming to address the challenge of detecting small and elusive UAV targets in complex scenes. The model incorporates a hierarchical attention mechanism and neighborhood weighted distance loss (NWDLoss) of Swin Transformer, enhancing its capability to detect small targets. The Swin Transformer enhances feature extraction through its global context perception ability, while NWDLoss optimizes the geometric modeling process of bounding box regression, especially in dense scenes and small target detection. Experimental results demonstrate that the NST-YOLO model achieves an average accuracy of 69.89 % on a test set consisting of real objects and multiple videos; the mean Average Precision at IoU threshold 0.5 (mAP50) and across thresholds 0.5–0.95 (mAP50:95) of the enhanced model reach 94.02 % and 54.74 %, respectively. In addition, the model achieves 33.87 Frames Per Second (FPS) on the test system, which satisfies the real-time requirements of target recognition. By improving the backbone network and loss function, while ensuring real-time performance, it has better recognition and tracking effects than other algorithms. The enhanced model improves detection accuracy while maintaining real-time performance, particularly in low-light and small-target scenarios. Overall, the algorithm achieves a favorable balance between recognition accuracy and inference speed, and demonstrates robust performance against interference. These characteristics highlight its theoretical significance and practical potential for real-time detection and edge AI applications.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 12","pages":"Article 103787"},"PeriodicalIF":5.9,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267869","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

Exponential synchronization and Ulam-Hyers-Rassias stability for n spiking neural networks with time delays via different controller matrix over a time scale 基于不同控制矩阵的n脉冲时滞神经网络的指数同步与Ulam-Hyers-Rassias稳定性

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-10 DOI: 10.1016/j.asej.2025.103783

Jie Li , Muhammad Abbas , Akbar Zada , Afef Kallekh

引用次数: 0

Research on improved preparation process of a traditional adhesive for inlaid porcelain 传统镶嵌瓷胶粘剂制备工艺的改进研究

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-10 DOI: 10.1016/j.asej.2025.103798

Xiaoxiao Wang , Dong Zheng , Ruiting Shi , Sheng’an Yang , Di Wang , Men Shao

引用次数: 0

Segregation of fault rates and repair times inputs for low voltage distribution networks 低压配电网故障率和维修时间输入的分离

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-10 DOI: 10.1016/j.asej.2025.103794

Mohd Ikhwan Muhammad Ridzuan, Norhafidzah Mohd Saad, Muhamad Zahim Sujod

{"title":"Segregation of fault rates and repair times inputs for low voltage distribution networks","authors":"Mohd Ikhwan Muhammad Ridzuan, Norhafidzah Mohd Saad, Muhamad Zahim Sujod","doi":"10.1016/j.asej.2025.103794","DOIUrl":"10.1016/j.asej.2025.103794","url":null,"abstract":"<div><div>Reliability assessment of low voltage distribution networks is essential for effective utility planning, regulatory compliance, and the delivery of consistent and high quality service to customers. Traditional approaches to reliability evaluation often overlook the unique characteristics of different load areas, such as highly urban, urban, sub urban, and rural regions, which can result in less accurate and less actionable outcomes. This study introduces a comprehensive methodology that addresses this gap by segregating fault rates and repair times according to specific load area categories, ensuring that the distinct operational realities of each area are properly represented. At the core of the methodology is a probabilistic simulation framework, the Reliability Segregation Based Monte Carlo Simulation, which models network reliability by integrating area specific fault rates and repair times with daily load profiles and fault probability distributions. Simulation results demonstrate that the segregated approach leads to more accurate reliability assessments, with urban areas generally achieving better performance indices than rural areas. This methodology supports more effective resource allocation, targeted infrastructure investment, and regulatory reporting for utility operators. The practical implications are significant, as the approach provides a transparent and reproducible tool that enables utilities and regulators to make informed decisions about maintenance strategies, investment priorities, and customer service improvements. By highlighting the importance of spatial diversity and applying area specific reliability inputs, this research advances the field by offering a more nuanced and reliable framework for the assessment of low voltage distribution networks. Ultimately, this work contributes to improved operational efficiency and enhanced service quality for diverse communities.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 12","pages":"Article 103794"},"PeriodicalIF":5.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267867","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

Dynamic response distortion due to changing excitation frequency 激励频率变化引起的动态响应失真

IF 5.9 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-10-10 DOI: 10.1016/j.asej.2025.103795

Z. Gazdagh , B. Vehovszky

{"title":"Dynamic response distortion due to changing excitation frequency","authors":"Z. Gazdagh , B. Vehovszky","doi":"10.1016/j.asej.2025.103795","DOIUrl":"10.1016/j.asej.2025.103795","url":null,"abstract":"<div><div>This study addresses the distortion in system response caused by continuously changing excitation frequency. The distortion leads to reduced resonance peak amplitude and shifts the resonance frequency as well. The novelty of this work lies in providing an analytically established, model-based methodology that not only describes but also predicts and enables one to control this distortion, in contrast to existing studies that mainly describe the phenomenon characteristically <span><span>[1]</span></span>, <span><span>[2]</span></span>. The proposed approach incorporates the influencing parameters, such as the sweep direction and rate of linearly changing excitation frequency, and applies a first-order ODE (ordinary differential equation) formulation to approximate the distortion. This enables a sensitivity analysis across frequency and damping ranges, which has not been previously reported in the literature. The methodology is validated with experimental data from an E-drive system, demonstrating how optimal sweep rates and other test conditions can be derived from model fitting. While nonlinear effects may occur in E-drives, the present study focuses on their linear regime to isolate distortion effects. The findings provide both fundamental insights into resonance distortion and practical guidelines for improving the accuracy and reliability of swept-excitation-based NVH (noise, vibration, harshness) measurements in engineering applications.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 12","pages":"Article 103795"},"PeriodicalIF":5.9,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267270","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