Journal of Engineering Research最新文献

Efficacy of geopolymerization for integrated bagasse ash and quarry dust in comparison to fly ash as an admixture: A comparative study 与粉煤灰作为外加剂相比，综合蔗渣灰和石矿灰的土工聚合功效：比较研究

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.08.010

{"title":"Efficacy of geopolymerization for integrated bagasse ash and quarry dust in comparison to fly ash as an admixture: A comparative study","authors":"","doi":"10.1016/j.jer.2023.08.010","DOIUrl":"10.1016/j.jer.2023.08.010","url":null,"abstract":"<div><div>This study compares the efficacy of geopolymerized bagasse ash (GB) and geopolymerized quarry dust (GQ) with traditional flay ash-based geopolymer considering the strength properties of a subgrade. Geopolymerized composited binary admixture (GBA) was constituted by incorporating the optimum percentages of GQ and GB, on the basis of a maximum reduction of 70% and 52% in plasticity index value respectively. Then samples for strength tests such as unconfined compression tests and California bearing ratio tests were remolded using standard and modified compaction parameters. Also, the mineralogical and microstructural analyses were conducted based on SEM and EDS. The influence of curing and percentage of geopolymers was also investigated on strength properties. The performance of GBA is equivalent to traditional fly-ash-based geopolymer (GF) considering strength properties like <em>q</em><sub><em>u</em></sub> and CBR ensuring more than 200% increase in the strength at 20% and 15% content respectively. However, at these contents, the ductility of GBA-treated samples is 107% higher than GF making this geopolymer more suitable under dynamic load. Formation of geopolymer gel ((N, C)-A-S-H) is confirmed by microstructural and elemental analyses but the microstructure of GBA treated sample is more porous than the microstructure of GF treated sample, which provides some advantage for particles reorientation of GBA treated sample under load before failure. Also, the proposed multi-waste geopolymer has significant implications for waste management, as its implementation for the construction of a two-lane subgrade covering a distance of 1 kilometer may enable the repurposing of 1313 tons of assorted solid waste.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75835229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Evaluation of Morinda citrifolia extract as sustainable inhibitor for mild steel in saline environment 评估海巴戟提取物作为盐碱环境中低碳钢可持续抑制剂的作用

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2024.01.013

{"title":"Evaluation of Morinda citrifolia extract as sustainable inhibitor for mild steel in saline environment","authors":"","doi":"10.1016/j.jer.2024.01.013","DOIUrl":"10.1016/j.jer.2024.01.013","url":null,"abstract":"<div><div>In this study, the <em>Morinda citrifolia</em> extract was evaluated as a sustainable inhibitor of mild steel in saline environments. The work aimed to determine the inhibition efficiency of new active material for metal corrosion inhibition. The powdered simplicia of <em>M. citrifolia</em> was extracted in the macerator for three days using a solvent daily. The functional group bonds of this extract were analyzed by Fourier Transform Infrared (FT-IR). The performance of <em>M. citrifolia</em> extracts was evaluated with potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques using a three-electrode cell system. The surface morphology of mild steel was pictured by Field effect scanning electron microscopy (FE-SEM) coupled with energy dispersive X-ray spectroscopy (EDX). Potentiodynamic polarization results show decreasing corrosion current (I<sub>corr</sub>) with the presence of an extract of <em>M. citrifolia</em>. Furthermore, resistance capacity transfer (Rct) increases with the addition of <em>M. citrifolia</em> extract. The optimum inhibition efficiency (%IE) was achieved at 300 mg L<sup>−1</sup> concentrations with 85.10% efficiency by using the PDP technique. The mild steel morphology in the addition of <em>M. citrifolia</em> extracts is smoother than the surface without adding extracts. The increase in corrosion inhibition was associated with the molecule adsorption from the active compounds into the steel surface. The study results confirmed that <em>M. citrifolia</em> is a potential biomaterial engineering for corrosion inhibitors on mild steel in a saline environment.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139637824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Microstructure, mechanical and tribological properties of Al/Cu functionally graded material fabricated through powder metallurgy 通过粉末冶金制造的铝/铜功能分级材料的微观结构、机械和摩擦学特性

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.100119

引用次数: 0

Estimation of recompression coefficient of soil using a hybrid ANFIS-PSO machine learning model 利用 ANFIS-PSO 混合机器学习模型估算土壤的再压缩系数

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.10.018

{"title":"Estimation of recompression coefficient of soil using a hybrid ANFIS-PSO machine learning model","authors":"","doi":"10.1016/j.jer.2023.10.018","DOIUrl":"10.1016/j.jer.2023.10.018","url":null,"abstract":"<div><div>Recompression coefficient (Cr) is =an essential parameter utilized to predict consolidation settlement of over-consolidated soil. Thus, the main aim of this work was to estimate accurately the Cr, using a hybrid ANFIS-PSO Machine Learning (ML) model that is a hybridization of Adaptive Neuro-Fuzzy Inference System (ANFIS) and Particle Swarm Optimization (PSO). To compare the performance of proposed model, we selected two other benchmark ML models: single ANFIS and Support Vector Machines (SVM). We collected and utilized the data of304 soil samples tested from various construction projects in Vietnam, which included 12 input variables (soil parameters) and one output variable (Cr). Validation indices, namely Correlation Coefficient (R), Root Mean Square Error (RMSE), and Mean Absolute Error (MAE) were utilized for the validation of the model’s performance. Correlation analysis of feature selection results indicated that seven input variables namely clay content, plasticity index, liquidity index, degree of saturation, specific gravity, dry density, and bulk density were of importance and thus selected for prediction of the Cr. Validation results indicated that predictive capability of the hybrid ANFIS-PSO model (R = 0.802) is the best in comparison with other two benchmark models namely SVM (R = 0.727) and single ANFIS (R = 0.734). The findings of our study suggest that the ANFIS-PSO is a powerful ML tool for effectively and quickly prediction of the Cr of soil. This can help save time and reduce costs associated with laboratory experiments for determining this important geotechnical parameter.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135922122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Analysis of variance (anova) of the influence of molybdenum and cobalt additives on piezoelectric, dielectric and ferroelectric properties of Pb(Zr0.52Ti0.48)O3 钼和钴添加剂对 Pb（Zr0.52Ti0.48）O3 的压电、介电和铁电特性影响的方差分析（anova）

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.07.005

{"title":"Analysis of variance (anova) of the influence of molybdenum and cobalt additives on piezoelectric, dielectric and ferroelectric properties of Pb(Zr0.52Ti0.48)O3","authors":"","doi":"10.1016/j.jer.2023.07.005","DOIUrl":"10.1016/j.jer.2023.07.005","url":null,"abstract":"<div><div>This study aims to determine how molybdenum and cobalt additives affect the structural and electrical characteristics of Pb(Zr0.52Ti0.48)O3. by substituting zirconate and titanate with molybdenum and cobalt, individually or in combination, in the range of 0–2%. The powders were initially made in order to achieve this via a wet chemical process. They were then calcined at 800 °C for 4 h. The calcined powders' XRD examination indicates that the tetragonal phase rapidly diminishes with dopant concentration and concurrently gives way to rhombohedral phase. With an increase in dopant concentration, a SEM analysis of sintered discs showed a considerable change in grain size initially at the Zr site. Detailed investigations of the PZT's piezoelectric properties Significant changes in the piezoelectric charge coefficient, electromechanical coupling coefficient, resonant frequency, and mechanical quality factor can be seen in the samples that were created and examined. Analysis of Variance was used to evaluate the impact of additives on resonance frequency, and the results revealed that the addition of molybdenum and cobalt has a significant impact on resonance frequency.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85837132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Direct flame test performance of boards containing waste undersized pumice materials 含有尺寸不足的废浮石材料的木板的直接火焰测试性能

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.09.007

{"title":"Direct flame test performance of boards containing waste undersized pumice materials","authors":"","doi":"10.1016/j.jer.2023.09.007","DOIUrl":"10.1016/j.jer.2023.09.007","url":null,"abstract":"<div><div>This study investigates the thermal performance of boards containing waste undersize pumice material directly exposed to flame in terms of thermal conductivity coefficient (TCC) and thermal efficiency ratio (TER). In the study, the direct flame was applied for 60 s on the front face of the 400×400×25 mm boards whose weight and density values, void ratio, porosity, and water absorption rates by weight and volume were determined. Because moisture content and porosity are significant factors in defining temperature-related properties of construction materials. The thermal characteristics of the boards were interpreted in this regard in connection to their moisture content and void ratios. At the end of the tests, the temperature difference between the front and back surfaces of the boards containing 10%, 30%, and 50% by weight of pumice stone powder and pumice sand was measured using a laser pyrometer. Compared to the reference sample without pumice, the TCC values decreased to 1.653, 1.649, and 1.540 W/mK, respectively, as a result of the use of pumice products in building materials. Moreover, TER values for the same samples increased to 82.6 %, 83.5 %, and 85.3 %, respectively.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76403367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Optimal energy management strategies for hybrid electric vehicles: A recent survey of machine learning approaches 混合动力电动汽车的最佳能源管理策略：机器学习方法最新调查

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2024.01.016

{"title":"Optimal energy management strategies for hybrid electric vehicles: A recent survey of machine learning approaches","authors":"","doi":"10.1016/j.jer.2024.01.016","DOIUrl":"10.1016/j.jer.2024.01.016","url":null,"abstract":"<div><div>Hybrid Electric Vehicles (HEVs) have emerged as a viable option for reducing pollution and attaining fuel savings in addition to reducing emissions. The effectiveness of HEVs heavily relies on the energy management strategies (EMSs) employed, as it directly impacts vehicle fuel consumption. Developing suitable EMSs for HEVs poses a challenge, as the goal is to maximize fuel economy yet optimize vehicle performance. EMSs algorithms are critical in determining power distribution between the engine and motor in HEVs. Traditionally, EMSs for HEVs have been developed based on optimal control theory. However, in recent years, a rising number of people have been interested in utilizing machine-learning techniques to enhance EMSs performance. This article presents a current analysis of various EMSs proposed in the literature. It highlights the shift towards integrating machine learning and artificial intelligence (AI) breakthroughs in EMSs development. The study examines numerous case studies, and research works employing machine learning techniques across different categories to develop energy management strategies for HEVs. By leveraging advancements in machine learning and AI, researchers have explored innovative approaches to optimize HEVs’ performance and fuel economy. Key conclusions from our investigation show that machine learning has made a substantial contribution to solving the complex problems associated with HEV energy management. We emphasize how machine learning algorithms may be adjusted to dynamic operating environments, how well they can identify intricate patterns in hybrid electric vehicle systems, and how well they can manage non-linear behaviors.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139634522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Distraction and visual search characteristics of young drivers when using navigation system displays 年轻驾驶员在使用导航系统显示屏时的分心和视觉搜索特征

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.09.023

{"title":"Distraction and visual search characteristics of young drivers when using navigation system displays","authors":"","doi":"10.1016/j.jer.2023.09.023","DOIUrl":"10.1016/j.jer.2023.09.023","url":null,"abstract":"<div><div>Navigation systems are fast and efficient sources of road information for drivers. However, they can increase the potential for accidents by distracting drivers. This study investigated the impact of navigation systems on driver distraction and visual search under various driving conditions. Using a driving simulator, eye-tracking technology recorded visual search data from twenty young drivers. The experiment analyzed factors such as driving environment (urban and rural), illumination level (day and night), and navigation system display size (large and small), as well as their interactions. Multiple eye movement metrics were employed, including duration and frequency of GPS fixation, dwell duration on the road ahead, and dwelling on mirrors and side windows. Statistical analysis employed repeated measures ANOVA to analyze the data. Findings revealed that small GPS displays caused greater distraction in terms of average and total gaze duration. Additionally, distraction increased during daytime driving conditions. In terms of visual search, wider and more dispersed search patterns were observed during the day, resulting in improved driving performance. This study aims to compare small and large navigation displays to identify the more effective option in reducing driver distractions. The research contributes to understanding driver distraction and visual search when using navigation system displays.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135349038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effect of riser-pipe cross section and plate geometry on the solar flat plate collector's thermal efficiency under natural conditions 立管横截面和平板几何形状对自然条件下太阳能平板集热器热效率的影响

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.100141

{"title":"Effect of riser-pipe cross section and plate geometry on the solar flat plate collector's thermal efficiency under natural conditions","authors":"","doi":"10.1016/j.jer.2023.100141","DOIUrl":"10.1016/j.jer.2023.100141","url":null,"abstract":"<div><div>The current study aims to enhance the thermal performance of the Solar Flat Plate Collector (SFPC). To achieve that, four proposed models of (SFPC) were investigated in terms of thermal response under transient solar radiation using passive techniques. Two of these models simulate the influence of different riser-pipe configurations, namely models A and B, respectively representing semicircular and elliptical cross sections. While, the other two models, -C- and -D- represent the effect of plate geometry, which represent dimples and channel plates, respectively. All geometric models and the numerical simulations were created using ANSYS 19. R3. The results show that there is good conformity between numerical and experimental findings. Moreover, all four proposed models have been found to have a better thermal response than conventional model. Furthermore, model -D- is found to be the better model among all the other models under investigation due to the increased surface area of the collector, which leads to receive more solar radiation (heat flux) and hence increases the heat transfer to the working fluid within the riser pipe, which increases the temperature of the working fluid and the water inside the container. The thermal response of model -D- in terms of working fluid temperature inside the container and water temperature at the exit is approximately 13.2% and 12.3% higher, respectively, as compared to the traditional model. In addition, the overall thermal efficiency of the model -D- collector is approximately 13.7% higher than the conventional model.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83922225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Numerical simulation study of indoor disinfection spray distribution based on CFD-DPM method 基于 CFD-DPM 方法的室内消毒喷雾分布数值模拟研究

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.10.039

{"title":"Numerical simulation study of indoor disinfection spray distribution based on CFD-DPM method","authors":"","doi":"10.1016/j.jer.2023.10.039","DOIUrl":"10.1016/j.jer.2023.10.039","url":null,"abstract":"<div><div>In today's world, environmental safety has become a top priority, with a special focus on terminal disinfection of indoor environments, which has proven to be a crucial and formidable issue in infection control. The use of hydrogen peroxide disinfection through vaporization or atomization presents a viable solution to the challenges posed by traditional wiping disinfection and ultraviolet disinfection methods that are plagued by incomplete disinfection and other factors that can significantly reduce the virus content within a room. To improve the application of hydrogen peroxide disinfection spray, the CFD-DPM (Computational Fluid Dynamics-Discrete Particle Model) method is employed to simulate the particle distribution of traditional sprays in a 30 m<sup>3</sup> room. The study places emphasis on analyzing the impact of the placement position and bottle number of disinfection spray on the distribution of spray particles. The results demonstrate an impressive consistency between the numerical simulation method and experimental findings regarding the particle size distribution of disinfectant spray across various Schemes, validating the method's accuracy and reliability. However, the placement of a single disinfection spray source is insufficient to achieve uniformly distributed particles throughout the space when a bathroom is present within a given room. Nevertheless, by placing internal and external sources within the bathroom, the distribution of disinfectant spray particles becomes more even, thanks to a well conceived placement technique and an increased number of spray sources. Among all the schemes tested, Scheme 4 stands out for its ability to produce the greatest number of spray particles, with almost 60.71% of these particles remaining airborne for over 40 s. Therefore, it is also the most effective scheme for conducting disinfection.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135371234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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