Journal of Engineering Research最新文献_第7页

Unraveling the role of sintering temperature on physical, structural and tribological characteristics of ball milled Co28Cr6Mo biomaterial based alloy 揭示烧结温度对球磨 Co28Cr6Mo 生物材料基合金的物理、结构和摩擦学特性的影响

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.10.040

{"title":"Unraveling the role of sintering temperature on physical, structural and tribological characteristics of ball milled Co28Cr6Mo biomaterial based alloy","authors":"","doi":"10.1016/j.jer.2023.10.040","DOIUrl":"10.1016/j.jer.2023.10.040","url":null,"abstract":"<div><div>This work aim to investigate the effect of sintering temperature (950–1250 °C) on structural, physical, tribological properties of nanobiomaterial Co28Cr6Mo alloy for total hip prosthesis obtained by high Energy ball milled. Several techniques such as density, porosity, microhardness, and Young’s modulus were used to assess the mechanical and physical characteristics. Tribological behavior were conducted using a ball-on-plate type Oscillating tribometer, under different applied loads (2, 10 and 20 N), under a wet condition using hank’s solution to simulate human body fluid. SEM, EDS and XRD analysis results, showed that Co-Cr-Mo alloy samples sintered exhibit the same phases created by the Co element. The alloy sintered at 1250 °C displayed the highest micro-hardness value in terms of mechanical characteristics (386.75 HV<sub>0.1.</sub> The porosity changes from 17% to 10% and endorse a higher change in Young’s modulus around 61.84 and 92.5 GPa for samples sintered beteewn 950 and 1250 °C, respectively,. A remarkable decrease in the wear rate and volume values is obtained for the sample sintered at 1250 °C (32.1610–3 μm3 (N.m)− 1) compared to other samples sintered at 1150 and 1250 °C. Under wet tribological conditions, the abrasive and adhesive wear mechanisms were identified as the main degradation mechanisms for all sintered samples.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 571-579"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135371418","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

Research and analysis of manipulator control method based on deep learning 基于深度学习的机械手控制方法研究与分析

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.11.001

{"title":"Research and analysis of manipulator control method based on deep learning","authors":"","doi":"10.1016/j.jer.2023.11.001","DOIUrl":"10.1016/j.jer.2023.11.001","url":null,"abstract":"<div><div>Aiming at the stability and accuracy of grasping objects, this paper studies the adaptive neural network control and learning of manipulator control system with unknown system dynamics. First, a stable adaptive neural network (NN) controller is designed, and the unknown closed-loop system dynamics of the manipulator is approximated by using radial basis function (RBF) neural network. The LSTM long and short memory algorithm is introduced, and the RBF based hybrid neural network model is constructed. The LSTM algorithm is used to design the input gate, forgetting gate and output gate structures to suppress the gradient expansion problem during coordinate data training, and accurate trajectory correction instructions are given. Lyapunov stability theorem is used to analyze stability. Partial persistent excitation (PE) conditions of some internal signals in the closed-loop system are satisfied in the control process of tracking the circular reference trajectory. Under the PE condition, the proposed adaptive NN controller can accurately identify the dynamic uncertainties of the manipulator in the stability control process. Then, a new NN learning control method is proposed, which effectively uses the knowledge learned without re adapting to the unknown manipulator control system dynamics to achieve closed-loop stability and improve control performance. The effectiveness of the proposed method is studied through simulation.</div><div>Keyboard</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 412-420"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135455482","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

Impact of digital architecture: The impact of digital technology on ecological formations and its effect on determinants of identity and culture in architectural design 数字建筑的影响：数字技术对生态形式的影响及其对建筑设计中身份和文化决定因素的影响

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.09.004

{"title":"Impact of digital architecture: The impact of digital technology on ecological formations and its effect on determinants of identity and culture in architectural design","authors":"","doi":"10.1016/j.jer.2023.09.004","DOIUrl":"10.1016/j.jer.2023.09.004","url":null,"abstract":"<div><div>Many researches and studies focused on the concept of identity, technology, and ecology, and the effect of these systems on the ecological and morphological formation of design. Lately digital technology spread very quickly and drew an effective impact on recent designs, but the connection between this digital development and the ecological and biological formations, especially the local and Arab ones, remains vague and cryptic. In fact, preserving cultural identity is considered one of the most prominent Arab issues raised for research and study, especially in the era of globalization ‘the new world order’, which is characterized by revolution in various fields. With that being said Arab and local architecture has been greatly affected. In many cases, the style of design used in local buildings is completely random and their origin is unknown. The best surviving example is the Islamic architecture. Back in the day it was characterized by a unique style and absolute originality, but with the latest developments its characteristic features started to fade away and changed it to an essence that does not resemble it and often does not define its civilization and its historical and cultural roots in any shape or form.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 285-293"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84747585","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

Utilizing industry 4.0-related technologies and modern techniques for manufacturing customized products – Smart yogurt filling system 利用工业 4.0 相关技术和现代工艺生产定制产品 - 智能酸奶灌装系统

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.100144

{"title":"Utilizing industry 4.0-related technologies and modern techniques for manufacturing customized products – Smart yogurt filling system","authors":"","doi":"10.1016/j.jer.2023.100144","DOIUrl":"10.1016/j.jer.2023.100144","url":null,"abstract":"<div><div>The fulfillment of a clean environment and sustainable development goals depends on production processes. Therefore, the recent changes in industrial output caused by digitalization are quite interesting from the perspective of sustainable development. Opportunities to increase productivity, decrease waste, and transition to a more effective manufacturing system are presented by this transformation. The current study aims to examine how Industry 4.0 (IR 4.0) can be advantageous for the environmental aspect of sustainable development, paying special attention to resource efficiency, efficient energy use, and transparency. IR 4.0 enabler technologies increase productivity, minimize waste, and progress toward a more efficient production system, showing the importance of evolving technologies in industrialization and mass customization. In order to observe the effects of new technologies in IR 4.0 on sustainability aspects, a case study of King Saud University's Smart Yogurt Filling System was examined using recent technologies such as the Internet of Things (IoT), reverse engineering, and additive manufacturing. The test and trial process reveals how these technologies might enhance sustainability in IR 4.0. Following the current study, the use of IR 4.0 enabler technologies demonstrated resource efficiency, transparency, and customer satisfaction as well as improving customer satisfaction, saving time and effort, increasing ergonomics, minimizing human interference, and enabling the delivery of customized products.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 468-475"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84085612","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

Calculation and research of fundamental frequency of casing string in shale gas horizontal wells 页岩气水平井套管串基频计算与研究

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.11.026

{"title":"Calculation and research of fundamental frequency of casing string in shale gas horizontal wells","authors":"","doi":"10.1016/j.jer.2023.11.026","DOIUrl":"10.1016/j.jer.2023.11.026","url":null,"abstract":"<div><div>In view of the fact that the fundamental frequency of the casing string in shale gas horizontal wells is difficult to be accurately obtained by numerical simulations and experimental methods, a research method is proposed based on the similarity model theory and the transfer matrix method. According to the similarity criterion from the similarity theory, a similarity model is established, and the similarity ratio of the natural frequency is obtained. Through the use of the transfer matrix method, the fundamental frequency of the experimental model of the casing string in horizontal wells with rigid support is analyzed, and its mathematical model is established. Through the calculation of the fundamental frequency of the experimental model and the result of the vibration experiment, the correctness of the model is verified. Besides, the fundamental frequency of a 2500 m long shale gas horizontal well casing string with 20 rigid centralizers is calculated. The calculation results show that the combination of the similarity theory and the transfer matrix method can realize the solution of the natural frequency of the casing string in large-scale horizontal wells, which is reliable, accurate and easy to be programmed.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 580-586"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139294046","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

Expired butamirate drug as eco-friendly corrosion inhibitor for aluminum in seawater: Experimental and theoretical studies 将过期的丁胺苯丙酮药物作为海水中铝的环保型缓蚀剂：实验和理论研究

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.11.020

{"title":"Expired butamirate drug as eco-friendly corrosion inhibitor for aluminum in seawater: Experimental and theoretical studies","authors":"","doi":"10.1016/j.jer.2023.11.020","DOIUrl":"10.1016/j.jer.2023.11.020","url":null,"abstract":"<div><div>In this work, an expired butamirate drug (EBD) was used as a corrosion inhibitor for aluminum in artificial seawater (3.5% NaCl solution). The corrosion rate was evaluated as a function of temperature and inhibitor concentrations using the electrochemical polarization technique. These data indicated that the EBD acts as a mixed-type corrosion inhibitor with a slight effect on the cathodic reaction. Corrosion current densities increased with temperature and decreased with inhibitor concentration. At a temperature of 328 K and an inhibitor concentration of 24 ml/l, the maximum corrosion inhibition efficiency was 84.4%. The cyclic polarization test confirmed the greater pitting resistance in the presence of butamirate drugs in solution. Adsorption studies showed that EBD adsorbed chemically on the metal surface following the Langmuir adsorption isotherm. Electronic microscopy showed enhancements in the surface morphology in the presence of EBD. While FTIR was used for the diagnosis of functional groups in EBD and surface corrosion products. In addition, theoretical quantum chemical calculations were used as a powerful tool to support the experimental studies.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 299-309"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139295018","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

DDR-Based PWM technique for fixed frequency three-phase to variable frequency K-phase power conversion using QZSDMC 基于 DDR 的 PWM 技术，利用 QZSDMC 实现固定频率三相到可变频率 K 相的功率转换

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.11.003

{"title":"DDR-Based PWM technique for fixed frequency three-phase to variable frequency K-phase power conversion using QZSDMC","authors":"","doi":"10.1016/j.jer.2023.11.003","DOIUrl":"10.1016/j.jer.2023.11.003","url":null,"abstract":"<div><div>This research presents a novel direct AC-to-AC topology for converting power from three phases (3φ) to five phases (5φ). The power conversion is handled by a Quasi Z Source Direct Matrix Converter (QZSDMC). This device is made up of a regular Direct Matrix Converter (DMC) and a pseudo Z-source impedance network that are serially connected. The proposed QZSDMC receives alternating current power in 3φ at a fixed voltage and frequency and outputs it in 5φ at a variable voltage and frequency to a standalone system. You can switch between buck and boost mode with a couple of switch flips. The shoot-through Duty Ratio value might help us understand the voltage transferal ratio. The authors suggested a unique control mechanism based on Direct Duty Ratio Pulse Width Modulation (DDRPWM) in this work. The method described here is only relevant when the amount of output phases is odd, not even. The paper uses MATLAB tools and experimental results to show the proposed system's operational principle in detail and prove its viability. Here, buck and boost conditions in all four quadrant modes with the proposed QZSDMC architecture, and the voltage gain constraint are addressed. It is more dependable, more efficient, and less expensive than a traditional back-to-back converter (B2BC).</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 444-453"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135509713","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

An investigation on the tribological properties of nano-tungsten carbide coating by ESD 通过静电放电研究纳米碳化钨涂层的摩擦学特性

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.08.008

引用次数: 0

Framework for PPP partner selection in K-12 educational facility procurement 在 K-12 教育设施采购中选择公私伙伴关系合作伙伴的框架

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.11.025

{"title":"Framework for PPP partner selection in K-12 educational facility procurement","authors":"","doi":"10.1016/j.jer.2023.11.025","DOIUrl":"10.1016/j.jer.2023.11.025","url":null,"abstract":"<div><div>Procurement procedures to select a private partner are of immense importance to the success of public-private partnerships in the K-12 education sector. The current approaches to private-partner selection mainly rely on generic evaluations of a limited number of criteria, which do not adequately address partnership risks during construction and operation or guarantee the quality of furnished educational services during the facility lifecycle. There is a crucial necessity to develop a customized method for the selection of the private partner in educational private-partnership projects. Guided by the principal author's firsthand experience as the chair of the evaluation committee, a private-partner selection framework is developed to reduce partnership risks and evaluate the quality of proposed educational public-private partnerships. To check for risk attributes and exclude high-risk partners, an early risk-reduction stage is proposed. In addition, to account for the specific nature of educational facility procurements, a technical evaluation phase that assesses design quality, functionality and facility management services is integrated into the proposal evaluation stage. The viability and effectiveness of the developed framework are validated by an application example which illustrates that the proposed risk reduction stage and the technical evaluation phase enable the selection process to be more effective, while pursuing value for money and guaranteeing the transparency of the partnership.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 369-378"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139303678","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

Improvement of energy saving and indoor air quality by using a spot mixing ventilation (SMV) system in a classroom 在教室中使用定点混合通风（SMV）系统改善节能和室内空气质量

IF 0.9 4区工程技术

Journal of Engineering Research Pub Date : 2024-09-01 DOI: 10.1016/j.jer.2023.100147

{"title":"Improvement of energy saving and indoor air quality by using a spot mixing ventilation (SMV) system in a classroom","authors":"","doi":"10.1016/j.jer.2023.100147","DOIUrl":"10.1016/j.jer.2023.100147","url":null,"abstract":"<div><div>Thermal comfort, energy saving, and room air quality are widely affected by the flow behavior in the occupied zone. In this paper, the concept of a spot mixing ventilation (SMV) system, which aims to supply cold fresh air directly to the occupant seating is developed and examined numerically for use in a typical classroom. Consequently, a proposed SMV system for the classroom was installed over each seated occupant at ceiling level. Occupant’s thermal comfort and energy enhancement were used as the main evaluation index which was employed to assess the performance of the proposed SMV system. The validated computational fluid dynamic (CFD) model was employed in this examination. Four different values of supply temperature, 19 °C, 20 °C, 21 °C, and 22 °C, were examined numerically to evaluate the occupant’s thermal comfort and energy enhancement in the investigated classroom with and without using the SMV system. The results show that the SMV system can reduce the energy demanded by the cooling coil from 4.522 kW as in cases 1, and 2–1.206 kW, 0.9045 kW, and 0.603 kW as in cases 3, 4, and 5 respectively. Furthermore, the SMV system was able to improve the quality of the indoor air by supplying fresh air directly to the seated occupants. It can be concluded that using the SMV concept can provide a significant enhancement in indoor thermal comfort and save more energy.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 523-538"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74423012","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