Ain Shams Engineering Journal最新文献_第4页

Calculation of metal sheath circulating currents in multi-circuit power cables laid in tunnels 隧道敷设多回路电力电缆金属护套环流计算

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-11 DOI: 10.1016/j.asej.2025.103408

Jianli Yu , Shanmao Gu , Guosheng Xu , Guangyue Zhu

{"title":"Calculation of metal sheath circulating currents in multi-circuit power cables laid in tunnels","authors":"Jianli Yu , Shanmao Gu , Guosheng Xu , Guangyue Zhu","doi":"10.1016/j.asej.2025.103408","DOIUrl":"10.1016/j.asej.2025.103408","url":null,"abstract":"<div><div>Abnormal circulation currents in metal sheaths are common in multi-circuit power cables. This study proposes an improved method for calculating the induced voltage in cable sheaths to characterize these currents. The new method improves the magnetic flux cross-section for calculating induced voltage in cable sheaths from a cross-section parallel to the ground to a cross-section formed by the equivalent circuit between the sheath and the ground, thus eliminating multiple limitations of the traditional method for calculating induced voltage in cable sheaths. Using the proposed approach, the metal sheath circulating currents (MSCC) in eight circuit cables were calculated, and the effects of cable laying configuration, grounding resistance, and metal sheath segment length on MSCC were analyzed. The results indicate that the MSCC in cables laid in the equilateral triangular configuration was slightly lower than in the parallel configuration, while no clear trend was observed in the mixed configuration. Increasing the grounding resistance reduced the MSCC but increased the induced sheath voltage. Under specific conditions, an appropriate increase in grounding resistance can effectively suppress MSCC. Additionally, uneven segmentation in cable cross-interconnection units can considerably increase MSCC, affecting surrounding cables to varying degrees.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103408"},"PeriodicalIF":6.0,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815913","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

Adaptive forest fire optimization algorithm for enhanced energy efficiency and scalability in wireless sensor networks 提高无线传感器网络能源效率和可扩展性的自适应森林火灾优化算法

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-10 DOI: 10.1016/j.asej.2025.103406

J. Samuel Manoharan , G. Vijayasekaran , I. Gugan , P. Nirmala Priyadharshini

{"title":"Adaptive forest fire optimization algorithm for enhanced energy efficiency and scalability in wireless sensor networks","authors":"J. Samuel Manoharan , G. Vijayasekaran , I. Gugan , P. Nirmala Priyadharshini","doi":"10.1016/j.asej.2025.103406","DOIUrl":"10.1016/j.asej.2025.103406","url":null,"abstract":"<div><div>Energy-efficient routing is a fundamental challenge in Wireless Sensor Networks (WSNs) due to constrained node energy. Traditional optimization techniques such as Ant Colony Optimization (ACO) and Particle Swarm Optimization (PSO) struggle to adapt to dynamic energy variations and network topology changes, leading to suboptimal energy utilization and premature node depletion. To address these limitations, this paper introduces the Forest Fire Optimization for Energy-Aware Routing (FFO-WSN), a novel routing algorithm inspired by fire propagation dynamics. The FFO-WSN model dynamically adjusts routing paths based on real-time energy levels, prioritizing high-energy nodes while avoiding energy-depleted ones, thereby enhancing network longevity and data transmission efficiency. Extensive simulations demonstrate that FFO-WSN outperforms ACO, PSO, and other hybrid nature-inspired methods, achieving 21.8% lower energy consumption, a 26.2% increase in network lifetime, 98.1% packet delivery ratio, and 1.02 Mbps throughput while maintaining low end-to-end delay. These results confirm the scalability and resilience of FFO-WSN, making it a promising solution for IoT-based health monitoring and smart city applications.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 7","pages":"Article 103406"},"PeriodicalIF":6.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815912","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

Assessment of complexities in implementation of conversational AI for the digital transformation of small construction project 小型建筑项目数字化转型中对话式人工智能实施的复杂性评估

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-10 DOI: 10.1016/j.asej.2025.103370

Fadi Althoey , Muhamamd Sajjad , Moustafa Houda , A. Waqar

{"title":"Assessment of complexities in implementation of conversational AI for the digital transformation of small construction project","authors":"Fadi Althoey , Muhamamd Sajjad , Moustafa Houda , A. Waqar","doi":"10.1016/j.asej.2025.103370","DOIUrl":"10.1016/j.asej.2025.103370","url":null,"abstract":"<div><div>The construction sector is rapidly moving toward the adoption of conversational artificial intelligence (AI). However, several complexities prevent conversational AI from being fully utilized in small construction projects. This study aims to identify and evaluate the key barriers that hinder the successful adoption of conversational AI in small construction projects, focusing on economic, personal, and technical challenges. Data were analysed using Exploratory Factor Analysis (EFA) and Structural Equation Modelling (SEM) from a survey of 244 construction industry experts. The scope of the research is limited to small construction projects, with emphasis on the technical and organizational hurdles faced by these projects when integrating conversational AI technologies. The results indicate that economic barriers, such as high implementation costs, have the most significant negative impact (β = 0.382, p < 0.001), followed by personal barriers, including security concerns (β = 0.367, p < 0.001), and technical barriers, such as technical complexity (β = 0.245, p < 0.001). The findings provide crucial insights for stakeholders aiming to overcome these barriers and encourage wider adoption of AI in the construction industry.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 6","pages":"Article 103370"},"PeriodicalIF":6.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807910","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

Performance evaluation, sensitivity analysis, and mitigating instabilities of Coanda effect-based flow control for a transonic jet: The investigation of shock effects 基于Coanda效应的跨声速射流流动控制的性能评估、灵敏度分析和稳定性缓解：激波效应的研究

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-05 DOI: 10.1016/j.asej.2025.103381

Mohammadreza Soufivand , Mohammad Hojaji , Shadi Ghafouri , Annunziata D’Orazio , Mohammad Amin Siabidzade , Aliakbar Karimipour

{"title":"Performance evaluation, sensitivity analysis, and mitigating instabilities of Coanda effect-based flow control for a transonic jet: The investigation of shock effects","authors":"Mohammadreza Soufivand , Mohammad Hojaji , Shadi Ghafouri , Annunziata D’Orazio , Mohammad Amin Siabidzade , Aliakbar Karimipour","doi":"10.1016/j.asej.2025.103381","DOIUrl":"10.1016/j.asej.2025.103381","url":null,"abstract":"<div><div>A flying object can be controlled in various ways. A specific flow control for a transonic jet has been proposed recently based on the Coanda effect and auxiliary flows. The present research uses experimental studies and numerical simulations to discuss and better understand the flow physics of this technique. First, the numerical simulations are validated based on experimental results. Then, a numerical simulation is used to determine various phenomena created in this flow, such as oblique shocks, Mach disks, barrel shocks, deflected shocks, and expansions and compressible fans. The results indicate that the thrust vector deflection is not significantly affected by nozzle sealing in the areas near the Coanda surface and connections with the body. Finally, considering the instabilities of this technique and the sensitivity of its performance to air sealing, a method is mentioned that will eliminate a significant part of its problems while maintaining the advantages of this technique.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 6","pages":"Article 103381"},"PeriodicalIF":6.0,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777241","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}

引用次数: 0

Peatland forest monitoring and management solution in Peninsular Malaysia: Optimal parameters for LoRa data 马来西亚半岛泥炭地森林监测和管理解决方案：LoRa数据的最佳参数

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-04 DOI: 10.1016/j.asej.2025.103374

Nur Luqman Saleh , Aduwati Sali , Liew Jiun Terng , Sharifah Mumtazah Syed Ahmad Abdul Rahman , Azizi Mohd Ali , Borhanuddin Mohd Ali , Sheriza Mohd Razali , Ahmad Ainuddin Nuruddin , Nordin Ramli

{"title":"Peatland forest monitoring and management solution in Peninsular Malaysia: Optimal parameters for LoRa data","authors":"Nur Luqman Saleh , Aduwati Sali , Liew Jiun Terng , Sharifah Mumtazah Syed Ahmad Abdul Rahman , Azizi Mohd Ali , Borhanuddin Mohd Ali , Sheriza Mohd Razali , Ahmad Ainuddin Nuruddin , Nordin Ramli","doi":"10.1016/j.asej.2025.103374","DOIUrl":"10.1016/j.asej.2025.103374","url":null,"abstract":"<div><div>Peatland forest fires threaten biodiversity, ecosystems, and human health in Southeast Asia, especially during the dry season. Limited in-situ data collection necessitates Long Range (LoRa) sensor-based remote monitoring for its long-range communication, low power consumption, and cost-effectiveness. However, dense vegetation affects Low-Power Wide Area Network (LPWAN) signal propagation through scattering, reflection, and diffraction, impacting data transmission. This study investigates LoRa RF propagation in peatland environments through a measurement campaign at Raja Musa Forest Reserve (RMFR), Selangor. File transfer success rate (FT%) across various land-cover types was analyzed using six Data Rate (DR) and Spreading Factor (SF) configurations. Results show that DR5/SF7 and DR0/SF12 achieve over 80% FT% in moderate and dense vegetation, respectively. The findings enhance LoRa RF planning in challenging ecosystems, offering practical guidelines to improve data transmission reliability in RMFR and other peatlands.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 6","pages":"Article 103374"},"PeriodicalIF":6.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769016","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}

引用次数: 0

SASLS: Semantic analysis of sentiment in social networks using Lexicon-Based methodology and Semi-Supervised sentiment annotation 使用基于词典的方法和半监督情感注释的社交网络情感语义分析

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-04 DOI: 10.1016/j.asej.2025.103378

Haozhi Liu , Amin Hosseini

{"title":"SASLS: Semantic analysis of sentiment in social networks using Lexicon-Based methodology and Semi-Supervised sentiment annotation","authors":"Haozhi Liu , Amin Hosseini","doi":"10.1016/j.asej.2025.103378","DOIUrl":"10.1016/j.asej.2025.103378","url":null,"abstract":"<div><div>Sentiment analysis has emerged as a prominent topic of research within the domain of natural language processing. The advancement of sentiment analysis techniques, particularly those based on dictionaries, has facilitated deeper insights into the sentiments expressed within textual data. Sentiment analysis uses a set of computational operations to identify the sentiment expressed in segment of words. By employing dictionary-based sentiment analysis techniques, researchers can automatically ascertain the polarity (positive, negative, or neutral) of textual content. This study presents a novel strategy for Semantic Analysis of Sentiment in social networks, which combines Lexicon-based methodology with semi-Supervised learning in order to improve sentiment analysis performance (SASLS). SASLS is to detect the polarity of words from twitter using personalized feature selection-based clustering and dictionary-based techniques. Our strategy can well deal with two common challenges in this problem, including the omnipresence of domain-specific vocabulary and the lack of labeled data in different domains. The proposed strategy has been evaluated on several datasets with different scales. Numerical findings show that SASLS significantly outperforms traditional supervised, unsupervised, semi-supervised, and deep learning approaches. Specifically, SASLS provides more than 2.5% more optimal Macro-F1 compared to the best existing state-of-the-art method. These results show that SASLS has good potential for semantic analysis of sentiments in social networks.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 6","pages":"Article 103378"},"PeriodicalIF":6.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769102","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}

引用次数: 0

Design of machine learning optimized THz MIMO antenna for next-generation wireless communication systems 下一代无线通信系统的机器学习优化太赫兹MIMO天线设计

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-04 DOI: 10.1016/j.asej.2025.103384

Shobhit K. Patel , Abdullah Baz , Dhruvik Agravat

{"title":"Design of machine learning optimized THz MIMO antenna for next-generation wireless communication systems","authors":"Shobhit K. Patel , Abdullah Baz , Dhruvik Agravat","doi":"10.1016/j.asej.2025.103384","DOIUrl":"10.1016/j.asej.2025.103384","url":null,"abstract":"<div><div>To meet the growing demand for high data rates in densely populated mobile networks, the development of compact and efficient antenna designs is necessary for the implementation of 5G and 6G technologies. The use of MIMO antenna technology shows promises in reducing network congestion. The present study investigates the benefits associated with the utilization of graphene in terahertz (THz) antenna applications. This investigation culminates in the development of a distinctive multiband Double Graphene Stripline Slot Patch – MIMO (DGSSP-MIMO) antenna, which operates at three frequencies: 4.71 THz, 8.55 THz, and 9 THz. When graphene was added, the reflection response (S11) decreased to −37.2783 dB, indicating that the signal was well contained within the antenna, though the gain was 8.46 dB lower than that of antennas without graphene (12.94 dB). We obtained very good results (R<sup>2</sup> = 0.976822) when tuning the parameters using machine learning optimization techniques. This demonstrates that graphene could be used to create high-performance terahertz antennas. The DGSSP-MIMO antenna, with its multiband response, has a wide range of applications in wireless communication and 6G technology.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 6","pages":"Article 103384"},"PeriodicalIF":6.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769103","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}

引用次数: 0

Instantaneous and exponential decay point source effects on two-dimensional heavy metal transport with adsorption and desorption in soil 瞬时和指数衰减点源对土壤中重金属二维吸附和解吸迁移的影响

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-03 DOI: 10.1016/j.asej.2025.103376

Ruishi Liang , Zaiton Mat Isa , Shaymaa M.H. Darwish

{"title":"Instantaneous and exponential decay point source effects on two-dimensional heavy metal transport with adsorption and desorption in soil","authors":"Ruishi Liang , Zaiton Mat Isa , Shaymaa M.H. Darwish","doi":"10.1016/j.asej.2025.103376","DOIUrl":"10.1016/j.asej.2025.103376","url":null,"abstract":"<div><div>In the mathematical modeling of the advection-diffusion equation (ADE) governing the transport of heavy metals in soil, it is essential to consider scenarios where the pollution source is not localized at the boundary but rather introduced as a source term within the equation, reflecting realistic situations where abrupt contamination events may occur within the soil matrix. Considering also adsorption and desorption, the ADE incorporate additional source term. This source term representing as a point source that satisfies instantaneous release and exponential decay release which can be used to simulate different types of pollution events in soil. Utilizing the Laplace transform method to obtain solutions, the dynamics of pollutant behavior in both cases are investigated. The results show that regardless of release type, the concentration reaches a peak near the source point area and remains higher while stabilizing over time. However, when the retardation factor varied, both shows similar behavior on the first day only but not at the fourth day. Additionally, the amount of particles release and exponential decay coefficient follows or aligns with its equations.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 6","pages":"Article 103376"},"PeriodicalIF":6.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759717","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}

引用次数: 0

A circularly polarized tunable frequency circular patch antenna for S-band space base application 一种适用于s波段空间基的圆极化可调频率圆形贴片天线

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.asej.2025.103368

Likhit Waranon , Sitthichai Dentri , Watid Phakphisut , Monai Krairiksh , Chuwong Phongcharoenpanich

{"title":"A circularly polarized tunable frequency circular patch antenna for S-band space base application","authors":"Likhit Waranon , Sitthichai Dentri , Watid Phakphisut , Monai Krairiksh , Chuwong Phongcharoenpanich","doi":"10.1016/j.asej.2025.103368","DOIUrl":"10.1016/j.asej.2025.103368","url":null,"abstract":"<div><div>This research proposes a unidirectional circularly polarized tunable frequency circular patch antenna scheme for S-band uplink satellite communications. In the antenna scheme, the circular radiating patch is enclosed by 4×8 rectangular-shaped auxiliary elements along the +<em>x</em>, −<em>x</em>, +<em>y</em>, and −<em>y</em>−axes. To shift the resonant frequency of the antenna to lower frequencies, the auxiliary elements on the four axes are uniformly shorted. There are nine shorting configurations (configurations A – I) corresponding to the S-band uplink chain (2.025 GHz to 2.110 GHz). Besides, the circular polarization is switchable between right- (RHCP) and left-hand circular polarization (LHCP) by relocating the feed point from the +<em>y</em> axis for RHCP to +<em>x</em> axis for LHCP. Switching mechanisms dynamically reconfigure the antenna by modifying its electrical length to support multiple frequency bands, all of which maintain circular polarization. Since the proposed antenna scheme is intended for the S-band uplink frequency of 2.06 GHz, measurements are carried out with configuration F of the antenna scheme. The measured impedance bandwidth (<span><math><mo>|</mo><msub><mrow><mi>S</mi></mrow><mrow><mn>11</mn></mrow></msub><mo>|</mo></math></span>≤-10 dB) and axial ratio bandwidth (AR<3 dB) are 6.2% and 4.49%, with the maximum gain of 6.54 dBic for RHCP and LHCP. The radiation pattern is of unidirectionality. Furthermore, the proposed antenna scheme meets the qualification sine vibration and random vibration test requirements. The proposed antenna scheme is thus suitable for S-band uplink satellite communications. The novelty of this research lies in the use of the auxiliary elements of various shorting configurations to achieve frequency tunability; and the alteration of the feed point location to switch between RHCP and LHCP.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 6","pages":"Article 103368"},"PeriodicalIF":6.0,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746898","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}

引用次数: 0

Multi-stage identification framework for steam generator modeling with gap metrics 带间隙度量的蒸汽发生器建模多级识别框架

IF 6 2区工程技术

Ain Shams Engineering Journal Pub Date : 2025-04-01 DOI: 10.1016/j.asej.2025.103382

Hongrui Wang , Pengbin Zhang , Kunpeng Xing , Jingyang Wang , Mingzhe Yuan

{"title":"Multi-stage identification framework for steam generator modeling with gap metrics","authors":"Hongrui Wang , Pengbin Zhang , Kunpeng Xing , Jingyang Wang , Mingzhe Yuan","doi":"10.1016/j.asej.2025.103382","DOIUrl":"10.1016/j.asej.2025.103382","url":null,"abstract":"<div><div>This paper focuses on the modeling of nonlinear multi-input, multi-output coupled steam generators in nuclear power plants. To address the problem of insufficient modeling accuracy due to the low signal-to-noise ratio of closed-loop operation sampling, a multi-stage identification framework integrating the least-squares method, instrumental variables method, and predictive error method is proposed. This framework is divided into three stages: parameter initialization, initial value estimation, and parameter optimization, aiming to progressively enhance the quality of model identification. Moreover, to address the complicated problem of piecewise linearization of nonlinear systems, a piecewise linearization strategy based on gap metrics with decreasing intervals from large to small is proposed. The strategy first uses data from large time-domain intervals for model identification, followed by refined time-domain interval data. This approach simplifies the piecewise linearization process and reduces the generation of redundant models. Through extensive simulation validation, this method has demonstrated its effectiveness in the modeling of nuclear power steam generators and valve condition monitoring. The enhancement percentages of the three steam generators are 18.95%, 10.19%, and 48.85%, respectively, highlighting the significant improvement in model accuracy. Additionally, fault monitoring simulations for the steam generator feedwater valve show significant differences between the predicted values and errors of the normal model under simulated fault scenarios. By setting safety thresholds based on historical data, the working status of the valve can be effectively monitored. This paper provides new research ideas and practical solutions for nuclear power steam generator modeling and condition monitoring, contributing to the advancement of related fields.</div></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":"16 6","pages":"Article 103382"},"PeriodicalIF":6.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738811","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}

引用次数: 0