Journal of Engineering Research最新文献

{"title":"Closed loop operation and testing with processor-in-loop (PIL) simulation of an asymmetrical six-phase open-ended winding synchronous machine","authors":"","doi":"10.1016/j.jer.2023.10.006","DOIUrl":"10.1016/j.jer.2023.10.006","url":null,"abstract":"<div><div>This paper presents a simple closed loop indirect field-oriented controlled operation for an asymmetrical six-phase open-ended winding synchronous motor in a newly defined two-axis (<em>M-T</em>) coordinate system, in which the common mutual leakage coupling between the two stator winding sets has been considered. Phasor diagram of the vector-controlled motor is developed under steady-state. Performance of a six-phase synchronous machine is presented in all four quadrant operations. A complete mathematical model is developed and controlled in a closed loop on Matlab/Simulink environment. Suitability and practical validity of the proposed control scheme are shown by conducting a test using processor-in-loop (PIL) by employing the STM32F407G board. An efficient data transfer at a high baud rate was obtained between the target board and host through an externally connected serial communication interface by using a USB-USART converter i.e. FT32RL board.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 433-443"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134978152","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}

{"title":"A novel stackelberg game-theoretic optimization model for interaction between two closed-loop supply chains with a queueing approach","authors":"","doi":"10.1016/j.jer.2024.01.021","DOIUrl":"10.1016/j.jer.2024.01.021","url":null,"abstract":"<div><div>Supply chain coordination is often facilitated through contracts, but these contracts can present numerous issues, such as production and distribution coordination problems, a lack of a holistic supply chain view, and long-term incompatibility. Game theory is a well-known method for finding solutions to these coordination problems. This research aims to evaluate communication and cooperation efficiency among industrial partners in supply chains, with a focus on stochastic customer demand. The primary objective is to optimize the coordination of the proposed supply chain by incorporating various types of contracts. Accordingly, a thorough exploration of game theory is conducted to identify solutions for the coordination problems inherent in supply chains. In this context, a comprehensive game theory formulation is proposed to determine the optimal interaction between supply chain members, with a particular focus on the variables of communication and coordination that need optimization. In this regard, the Stackelberg equilibrium is applied to find the best possible solution. The proposed model combines queuing theory to evaluate aspects and game theory when customers can communicate between two supply chains to make decisions. Numerical results show that implementing the proposed method increased the profit for the entire system by 7%. Moreover, cooperation between different companies in the distribution system can yield a higher expected profit for all partners under different scenarios.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 494-501"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139686585","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}

{"title":"Predicting academic performance of learners with the three domains of learning data using neuro-fuzzy model and machine learning algorithms","authors":"","doi":"10.1016/j.jer.2023.09.006","DOIUrl":"10.1016/j.jer.2023.09.006","url":null,"abstract":"<div><div>In recent days, learners faced difficulties learning programming courses. This research study will help the learners learn complex concepts quickly with different activities like flipped classrooms, online quizzes, learning by doing, and a virtual laboratory. This research is carried out to address the difficulties of learners and cover all the domains of learning, including knowledge, Skill, and Attitude. The fuzzy logic method has recently been applied in education to overcome these restrictions. While employing the fuzzy logic approach to evaluate student achievement, qualifications are assessed qualitatively rather than quantitatively. This research study applies Fuzzy Logic in the first stage, Factor Analysis (FA), and Machine Learning (ML) techniques in the second stage to discover essential factors associated with the effective use of Active Learning Strategies (ALS) in the Learning Management System (LMS) of information technology course learners. Fuzzy logic and neural network topology can be coupled using ANFIS, an adaptable network. FA is performed to find the critical factors for successful learners. The study compares the performance of five supervised machine learning algorithms: K-Nearest Neighbor, Decision Tree, Naive Bayes, Discriminant Analysis, and Support Vector Machine. These classifiers are evaluated to determine their suitability and model fit in the context of the research. In this study, real-time data is collected from B.Tech Information Technology learners. The following prediction models achieved high accuracy before FA analysis: Naive Bayes (90 %), Support Vector Machine (89 %), Discriminant Analysis (88 %), Decision Tree (86 %), and K-Nearest Neighbors (82 %). Naive Bayes gives the best accuracy, with 90 %. Following factor analysis (FA), the accuracy achieved by various classifiers is as follows: Naive Bayes - 92 %, K-Nearest Neighbors - 92 %, Support Vector Machine - 90 %, Discriminant Analysis - 89 %, and Decision Tree - 88 %. Among these, Naive Bayes and K-Nearest Neighbors exhibit the highest accuracy of 92 %.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 397-411"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78293713","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}

{"title":"The source-load-storage coordination and optimal dispatch from the high proportion of distributed photovoltaic connected to power grids","authors":"","doi":"10.1016/j.jer.2023.10.042","DOIUrl":"10.1016/j.jer.2023.10.042","url":null,"abstract":"<div><div>With the rapid development of distributed PV, many distributed PV devices are connected to the power grid, which is essential to optimize the scheduling in the power grid containing a high proportion of distributed PV. In this paper, a new day-ahead optimal dispatching model of a power system combined with the high proportion of photovoltaic is established. The impact of time-of-use tariffs on customers and the regulation of electricity by energy storage plants are considered in the model. The main contribution of this paper is that providing a better solution for grids with a high proportion of distributed photovoltaic, reducing carbon emissions and improving photovoltaic consumption. A solution approach i.e., Wild horse optimizer (WHO) is employed to optimal dispatch. The results show that compared with the Particle swarm algorithm, using the Wild horse optimizer has saved 16% costs, reduced 28% in thermal power carbon emissions, and increased 24% in distributed PV utilization rates. Wild horse optimizer is a better optimal approach which can reduce distributed PV abandonment rates and decrease costs when applied to the optimal scheduling in the grid with high percentage of distributed photovoltaic.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 421-432"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135411380","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}

{"title":"PSF/GO filtering membrane fabricated by electro-spinning applied on arsenic contaminated underground water","authors":"","doi":"10.1016/j.jer.2024.01.001","DOIUrl":"10.1016/j.jer.2024.01.001","url":null,"abstract":"<div><div>The excess arsenic content in groundwater sources threatens more than 50 million people worldwide. Current water treatment projects use polysulfone nanofiltration membranes (NFM). However, the inherent hydrophilicity of polysulfone nanofiltration membranes causes the membrane fouling problem. This study addresses this problem by improving the hydrophilic and anti-pollution properties by doping graphene oxide (GO) particles in polysulfone(PSF) membranes. Microstructure, morphology, and hydrophilicity of PSF/GO membranes were analyzed by field emission scanning electron microscope (FEFEM), contact angle, and BET surface area analysis. X-ray diffraction (XRD), zeta potential, Energy Dispersive Spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) were used to analyze the results of the phase structure and element distribution. Permeation tests and adsorption of arsenic experiments were used to study the filtration performance of PSF/GO membranes. The results showed that PSF/GO with high porosity enlarged the specific surface area significantly. The contact angle decreased by only about 7°. Still, the water flux increased from 33.26 L/m2/h to 183.62 L/m2/h, which weakened the effect caused by membrane contamination of the arsenate solution and GO doping on the arsenate adsorption rate of PSF/GO nanofiltration membrane was discussed. The results showed that solution pH was crucial in As (V) adsorption onto PSF/GO and obtaining higher adsorption capacity at higher pH. In an alkaline environment, The adsorption rate increased from 26.71% of pure PSF fiber membrane to 79.83%.</div></div>","PeriodicalId":48803,"journal":{"name":"Journal of Engineering Research","volume":"12 3","pages":"Pages 310-320"},"PeriodicalIF":0.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139395163","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}

{"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_0.1. 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}

{"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}

{"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}

{"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}

{"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}