alexandria engineering journal最新文献

{"title":"Objective determination of initiation stress and damage stress in rock failure using acoustic emission and digital image correlation","authors":"Peng Liang ,&nbsp;Yanbo Zhang ,&nbsp;Xulong Yao ,&nbsp;Guangyuan Yu ,&nbsp;Qiang Han ,&nbsp;Junling Liu","doi":"10.1016/j.aej.2025.02.077","DOIUrl":"10.1016/j.aej.2025.02.077","url":null,"abstract":"<div><div>Crack initiation stress and damage stress are two critical characteristic stresses in the rock failure process, and their precise determination is essential for a comprehensive understanding of the progressive failure mechanisms of rocks. In this study, a granite shear experiment was conducted using acoustic emission sensors for detecting shear and primary wave signals, while principal strain was measured using the digital image correlation (DIC) method. Three damage variables were established based on the cumulative counts of acoustic emission shear waves, primary waves, and principal strain, and their evolution patterns were analyzed. The research aimed to explore a method for determining rock characteristic stresses by integrating acoustic emission monitoring with the DIC method. The findings indicate that the damage variable based on the cumulative count of acoustic emission primary waves exhibits an S-shaped curve, which effectively describes the early stage of rock fracture development. The damage variable based on the cumulative count of acoustic emission shear waves and principal strain shows an exponential change, accurately depicting the accelerated development stage of rock fracture damage. The trends of these two variables are closely aligned, with a correlation coefficient of 0.99, indicating a strong positive correlation. Acoustic emission primary waves are suitable for identifying crack initiation stress, while acoustic emission shear waves can serve as an alternative to the DIC method for determining damage stress. Additionally, an accurate identification and determination method for rock initiation and damage stresses based on acoustic emission monitoring was proposed, utilizing the Kneedle algorithm to automatically detect inflection points and identify sudden increases in the curve. These results provide a novel approach for accurately determining rock characteristic stresses, offering broader prospects for engineering applications.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"121 ","pages":"Pages 156-166"},"PeriodicalIF":6.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the forcing and collapsing properties of a nonlinear random two-dimensional Schrödinger model in applied physics","authors":"H.G. Abdelwahed ,&nbsp;Reem Alotaibi ,&nbsp;E.K. El-Shewy ,&nbsp;Mahmoud A.E. Abdelrahman","doi":"10.1016/j.aej.2025.02.047","DOIUrl":"10.1016/j.aej.2025.02.047","url":null,"abstract":"<div><div>We created novel stochastic solitary structures for the system mode of nonlinear random two-dimension Schrödinger equation (NTDNLSE) with sources term via Wiener process using the unified solver technique. For stochastic shocks, breathers, explosions, dissipated dark solitons, and blow-up solution waves, the forcing and collapsing characteristics in random NTDNLSE have been examined. The impacts of random factor on magnitude and behavior of the obtained solutions have been examined. It was reported that the possibility of the rapid wave collapsing and transformation of solitonic waves into dissipative collapsing forms rises with the random parameter. Accordingly, the source term coefficient modulates the damping and forcing random wave characteristics. Our results demonstrate that the suggested solver is accurate and efficient enough to tackle many different models occurring in applied science.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"121 ","pages":"Pages 150-155"},"PeriodicalIF":6.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Yo3RL-Net:A fusion of two-phase end-to-end deep net framework for hand detection and gesture recognition","authors":"Xiang Wu ,&nbsp;Yuanhao Ma ,&nbsp;Shijie Zhang ,&nbsp;Tianfei Chen ,&nbsp;He Jiang","doi":"10.1016/j.aej.2025.01.097","DOIUrl":"10.1016/j.aej.2025.01.097","url":null,"abstract":"<div><div>When it comes to intelligent industrial production, gesture-based human–computer interaction encounters obstacles such as limited visibility due to objects blocking the view, intense illumination, and the difficulties of identifying small, faraway targets. In order to tackle these problems, we suggest a sophisticated approach called Yo3RL-Net using Yolo Algorithm and 3D Resnet-LSTM, which is designed specifically for hand detection and gesture recognition. During the hand detection phase, the YOLOv8 algorithm is improved by incorporating dynamic snake convolutions, CPCA attention modules, and a detection layer specifically designed for small targets. Additionally, the Inner-CIoU loss function is replaced. These enhancements greatly improve the extraction of hand characteristics in video frames. For the gesture recognition phase, we suggest utilizing a method that combines a three-dimensional residual network with a long short-term memory (LSTM) network. The average recognition rate of 93.78% was achieved through experiments conducted on a specific set of seven dynamic gestures. The results demonstrate that the suggested model enhances recognition accuracy by 11.5% and 5.45% in comparison to models just employing 3D CNN and 3D CNN-Bi-LSTM, respectively. Consequently, this model provides a superior user experience in gesture interaction tasks.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"121 ","pages":"Pages 77-89"},"PeriodicalIF":6.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DanceFormer: Hybrid transformer model for real-time dance pose estimation and feedback","authors":"Hong Zhao ,&nbsp;Bojing Du ,&nbsp;Yongju Jia ,&nbsp;Hui Zhao","doi":"10.1016/j.aej.2025.02.014","DOIUrl":"10.1016/j.aej.2025.02.014","url":null,"abstract":"<div><div>Dance pose estimation holds significant value in teaching, training, and performance within the dance domain. However, challenges such as multi-target tracking in complex dynamic scenes, real-time demands, and computational resource constraints have posed difficulties for traditional methods. This paper introduces DanceFormer, a Transformer-based model for dance pose estimation that integrates the Vision Transformer (ViT), Time Series Transformer (TST), and an edge computing layer to achieve deep fusion of multimodal features, enhancing accuracy and real-time feedback capabilities. Experiments on the AIST and DanceTrack datasets show DanceFormer achieves pose estimation accuracy (MPJPE) of 18.4 mm and 20.1 mm, and multi-object tracking accuracy (MOTA) of 92.3% and 89.5%, outperforming other models. The edge computing design reduces average latency to 35.2ms, providing robust real-time processing suitable for low-resource edge devices. DanceFormer offers an efficient, precise, and real-time solution for complex dance scenarios, with broad application potential in dance education and real-time motion analysis. Future work will focus on optimizing the edge computing module and enhancing model generalization through data augmentation and dataset diversification.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"121 ","pages":"Pages 66-76"},"PeriodicalIF":6.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-adaptive Emperor Penguin Optimizer with multi-strategy parameter adaptation mechanism for complex optimization problems","authors":"Othman Waleed Khalid ,&nbsp;Nor Ashidi Mat Isa ,&nbsp;Wei Hong Lim","doi":"10.1016/j.aej.2025.02.046","DOIUrl":"10.1016/j.aej.2025.02.046","url":null,"abstract":"<div><div>This study introduces the Self-adaptive Emperor Penguin Optimizer (SA-EPO), a new variant that addresses the exploration–exploitation balance limitations of the original EPO due to its statics control parameters. SA-EPO integrates multiple parameter adaptation strategies with unique features and selection probabilities, enabling dynamic modification of control parameters based on individual solution performance. An intelligent selection mechanism within SA-EPO’s framework periodically updates the selection probabilities of these parameter adaptation strategies based on their historical effectiveness in enhancing solution quality, ensuring the optimal strategy is consistently employed. SA-EPO's efficacy is validated against 15 leading optimization algorithms through tests on 41 benchmark functions from the CEC2017 and CEC2022. Furthermore, SA-EPO's capability are demonstrated on seven real-world engineering challenges. Comprehensive non-parametric statistical analyses, including Friedman test and Wilcoxon signed rank test, confirm the superior accuracy and convergence speed of SA-EPO across a range of optimization scenarios. The SA-EPO demonstrates substantial performance enhancements compared with the EPO, with improvements of 47.9 % and 52.4 % in Freidman rank for CEC2017 and CEC2022, respectively. Additionally, the Wilcoxon signed rank test reveals a 100 % improvement, indicating a complete advantage over the EPO in all tested scenarios. These findings highlight its potential to drive industrial and process innovation in diverse optimization tasks.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"120 ","pages":"Pages 657-686"},"PeriodicalIF":6.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of advanced intrusion detection in cybersecurity using ensemble of deep learning models with an improved beluga whale optimization algorithm","authors":"Fatimah Alhayan ,&nbsp;Nuha Alruwais ,&nbsp;Mohammad Alamgeer ,&nbsp;Abdullah M. Alashjaee ,&nbsp;Monir Abdullah ,&nbsp;Alaa O. Khadidos ,&nbsp;Fouad Shoie Alallah ,&nbsp;Abdulrhman Alshareef","doi":"10.1016/j.aej.2025.02.069","DOIUrl":"10.1016/j.aej.2025.02.069","url":null,"abstract":"<div><div>The rapid growth and evolution of the Internet over the last few decades caused more concern about frequently changing and increasing cyberattacks. The Intrusion Detection System (IDS) is a powerful tool applied in cybersecurity methods to identify and detect intrusion attacks. Also, the probability of several intrusion attacks rises with the enormous data generation. Feature selection (FS) is vital and essential for improving performance. The dataset structure can influence the efficacy of the machine learning (ML) method. Besides, data imbalance can pose a problem, but sampling techniques can assist in reducing it. As an outcome, an efficient IDS was needed to protect the data, and the innovation of artificial intelligence's (AI) sub-domains, ML, and deep learning (DL) was one of the most effective methods to deal with this issue. Therefore, this study develops an Enhanced Intrusion Detection in Cybersecurity Using Ensemble Learning with Improved Beluga Whale Optimization (IDCS-ELIBWO) technique. The proposed IDCS-ELIBWO technique mainly addresses the detection of intrusions to achieve cybersecurity in a network. In the IDCS-ELIBWO approach, the main phase of data normalization employing min-max normalization is performed. The remora optimization algorithm (ROA) is utilized for FS and diminishes computation complexity. For cybersecurity detection, the IDCS-ELIBWO technique employs ensemble learning classifiers containing three methods such as deep belief network (DBN), gated recurrent unit (GRU), and long short-term memory (LSTM). At last, an improved beluga whale optimization (IBWO) method is used for the hyperparameter tuning process. An extensive experiment is conducted to examine the improved performance of the proposed IDCS-ELIBWO method. The performance validation of the IDCS-ELIBWO technique portrayed a superior accuracy value of 99.77 % over recent methods.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"121 ","pages":"Pages 90-102"},"PeriodicalIF":6.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A secure and lightweight authentication scheme for digital forensics in industrial internet of things","authors":"Nan Xiao ,&nbsp;Zhaoshun Wang ,&nbsp;Xiaoxue Sun","doi":"10.1016/j.aej.2025.02.059","DOIUrl":"10.1016/j.aej.2025.02.059","url":null,"abstract":"<div><div>With the rapid development of Industrial Internet of Things (IIoT) technology, it has played a core role in promoting the intelligent transformation of manufacturing industry. However, the complexity and diversity of IIoT environment also bring serious network security challenges, especially frequent incidents such as data breaches and device tampering, which pose significant threats to industrial security. As a key means of addressing such threats, the effectiveness and credibility of digital forensics directly depend on the security and efficiency of identity authentication schemes. This article proposes a secure and lightweight multi factor authentication scheme based on chebyshev chaotic mapping to address the identity authentication challenge of digital forensics in IIoT. This scheme enhances the strength of identity authentication through a three-factor authentication mechanism, utilizes chebyshev chaotic mapping to achieve efficient key negotiation. This article comprehensively verifies the scheme using security proof, BAN logic and Scyther. The results show that the scheme can effectively resist various malicious attacks and has high security and reliability. Compared with existing schemes, the proposed scheme significantly reduces costs and improves authentication efficiency while meeting security requirements, providing strong security support for digital forensics in IIoT.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"121 ","pages":"Pages 117-127"},"PeriodicalIF":6.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The coupling effect of sloshing and vibrations of a rectangular tank subjected to rectilinear motion","authors":"Soo-Min Kim ,&nbsp;Moon K. Kwak ,&nbsp;Dae W. Kim ,&nbsp;Kuk-Su Kim ,&nbsp;Marco Amabili","doi":"10.1016/j.aej.2025.02.068","DOIUrl":"10.1016/j.aej.2025.02.068","url":null,"abstract":"<div><div>This study focuses on analyzing the interactions that occur between sloshing and hydroelastic vibrations in the wall plate of a rectangular tank that contains fluid when it is subjected to rectilinear motion. Previous research has often examined the sloshing and fluid-structure interaction problem independently of each other. By contrast, this study adopts a unified approach that simultaneously addresses both phenomena through the solution of coupled equations of motion. This formulation utilizes the energy approach and the assumed modes method. The present study also derives a standard eigenvalue problem for the free vibration of the plate in conjunction with sloshing. Moreover, it explores the impact of the tank's rectilinear base movement on the coupled responses of the plate and sloshing. This approach facilitates the prediction of sloshing behavior and its influence on the elastic wall, as well as the examination of how wall vibrations affect sloshing motion. To experimentally validate the theoretical results, a rectangular tank with an elastic side wall was constructed and then partially filled with water. The obtained experimental results were consistent with the numerical predictions.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"121 ","pages":"Pages 103-116"},"PeriodicalIF":6.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The performance analysis of shear walls with opening based on quantitative identification method of vibration modes","authors":"Panxu Sun,&nbsp;Peijiang Nie,&nbsp;Kaixuan Liang,&nbsp;Dongwei Wang","doi":"10.1016/j.aej.2025.02.074","DOIUrl":"10.1016/j.aej.2025.02.074","url":null,"abstract":"<div><div>Shear walls are the main lateral force resistant components of building structures. The position and shape of openings seriously affect the performance of shear walls. Thus, this paper adopts the vibration mode quantification identification method based on orthogonal theory, which takes the lateral displacement resistance, ductility and local bending characteristics of shear walls as performance indexes. Meanwhile, the indexes are quantified by the fundamental natural frequency, shear deformation proportion and the bending coefficient of wall limbs. The performance of shear wall with staggered or eccentric opening is analyzed. The lateral displacement resistance of the shear wall with regular opening is smaller than that of the shear wall with irregular opening. The ductility of the shear wall with regular arrangement at the opening is relatively higher. The lateral displacement resistance, ductility and local bending characteristic of shear walls with symmetrical opening are better than those of shear walls with asymmetrical opening.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"120 ","pages":"Pages 637-647"},"PeriodicalIF":6.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of design plastic strain limit for notched structural steel tensile specimens","authors":"Kirill Golubiatnikov,&nbsp;Abhishek Ghimire,&nbsp;František Wald,&nbsp;Vojtěch Stančík","doi":"10.1016/j.aej.2025.02.075","DOIUrl":"10.1016/j.aej.2025.02.075","url":null,"abstract":"<div><div>Steel structures play a central role in construction due to their high strength, ductility, and adaptability in modifying their longitudinal shape or cross-section. However, each modification significantly impacts both the load-bearing capacity and the local distribution of stresses and strains, which are critical factors to be carefully considered during the design process. This study presents the results of numerical and experimental analyses on notched tensile specimens made of S235 steel. Experimental results were used to validate numerical models. Real material properties were obtained from coupon test results, and material models were subsequently developed. A total of 63 numerical simulations were conducted with systematically varied numerical parameters. Corresponding equivalent plastic strains were measured at the analytical design tension resistance and evaluated through reliability analysis in accordance with EN 1990. The equivalent plastic strain limit was determined to be 5.38 %, calculated using the First-Order Reliability Method.</div></div>","PeriodicalId":7484,"journal":{"name":"alexandria engineering journal","volume":"121 ","pages":"Pages 38-52"},"PeriodicalIF":6.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}