Journal of Engineering Studies and Research最新文献_第9页

CHEMICAL ANALYSIS OF WATER SOURCED FROM ODO ONA RIVER, IBADAN, SOUTH-WESTERN NIGERIA 尼日利亚西南部伊巴丹市奥多纳河水源的化学分析

Journal of Engineering Studies and Research Pub Date : 2021-10-10 DOI: 10.29081/jesr.v27i2.273

F. Nkeshita, A. Adekunle, A. Adedeji

引用次数: 0

A REAL TIME FACE RECOGNITION SYSTEM USING ALEXNET DEEP CONVOLUTIONAL NETWORK TRANSFER LEARNING MODEL 一个采用alexnet深度卷积网络迁移学习模型的实时人脸识别系统

Journal of Engineering Studies and Research Pub Date : 2021-10-10 DOI: 10.29081/jesr.v27i2.277

L. Omotosho, I. Ogundoyin, Joshua O. Oyeniyi, Oluwashina A. Oyeniran

{"title":"A REAL TIME FACE RECOGNITION SYSTEM USING ALEXNET DEEP CONVOLUTIONAL NETWORK TRANSFER LEARNING MODEL","authors":"L. Omotosho, I. Ogundoyin, Joshua O. Oyeniyi, Oluwashina A. Oyeniran","doi":"10.29081/jesr.v27i2.277","DOIUrl":"https://doi.org/10.29081/jesr.v27i2.277","url":null,"abstract":". In the field of deep learning, facial recognition belongs to the computer vision category. In various applications such as access control system, security, attendance management etc., it has been widely used for authentication and identification purposes. In deep learning, transfer learning is a method of using a neural network model that is first trained on a problem similar to the problem that is being solved. The most commonly used face recognition methods are mainly based on template matching, geometric features based, algebraic and deep learning method. The advantage of template matching is that it is easy to implement, and the disadvantage is that it is difficult to deal with the pose and scale changes effectively. The most important issue, regardless of the method used in the face recognition system, is dimensionality and computational complexity, especially when operating on large databases. In this paper, we applied a transfer learning model based on AlexNet Deep convolutional network to develop a real time face recognition system that has a good robustness to face pose and illumination, reduce dimensionality, complexity and improved recognition accuracy. The system has a recognition accuracy of 98.95 %.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46300915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANALYTICAL STUDY OF THE STATIC THERMOMECHANICAL STRESSES OF THE ASSEMBLIES WITH OPTIONAL RING FLANGES. ROTATION OF THE FLANGE RING AROUND THE CIRCUMFERENCE OF CENTERS FOR BOLT HOLES 具有可选环形法兰的组件静态热机械应力的分析研究。法兰环绕螺栓孔中心圆周的旋转

Journal of Engineering Studies and Research Pub Date : 2021-10-10 DOI: 10.29081/jesr.v27i2.268

I. RADU I., G. Tomescu, Georgeta Roman (Urse), Melania CORLECIUC (MITUCA), I. Panait

引用次数: 0

MODELING AND SIMULATION OF A DUAL CHANNEL ACTIVE NOISE CONTROL SYSTEM FOR POWER TRANSFORMER USING FXLMS ALGORITHM 基于FXLMS算法的电力变压器双通道有源噪声控制系统建模与仿真

Journal of Engineering Studies and Research Pub Date : 2021-10-10 DOI: 10.29081/jesr.v27i2.266

Adetona Sunday, Salawu Raifu, Alabi Moruf

{"title":"MODELING AND SIMULATION OF A DUAL CHANNEL ACTIVE NOISE CONTROL SYSTEM FOR POWER TRANSFORMER USING FXLMS ALGORITHM","authors":"Adetona Sunday, Salawu Raifu, Alabi Moruf","doi":"10.29081/jesr.v27i2.266","DOIUrl":"https://doi.org/10.29081/jesr.v27i2.266","url":null,"abstract":"Power transformers are known to generate noise, however, active noise emanating from power transformers many at time is unbearable and has been a subject of concern overtime in power engineering. Several studies on it have principally centered on single channel active noise controller (scANC) using fixed step size, which are characterized with the problems such as signal congestion and instability. This study, therefore, employed Filtered-X Least Mean Square (FXLMS) on a dual channel active noise controller (dcANC) using variable step-size. The noise emanating from a 100 MVA, 132/33 kV power transformer was captured with the help of a smart phone in flight mode in accordance with IEC 60076-10 standard of 2 m away from the transformer and 1 m apart between each measurement. The recorded noises were taken at one-third of the height of the transformer tank, while electromagnetic interference from the phone and others were assumed to be negligible. A dcANC with FXLMS was model mathematically and implemented in Simulink in the MATLAB environment. Noise reduction ratio, loudness unit full scale and mean square error were used as performance metrics. The simulation results obtained showed that the original noise emanating from the power transformer when ANC was not used was found to be 70 dB. When scANC with FXLMS was used, the noise was reduced to 30.55 dB whereas, when dcANC with the FXLMS was employed it was reduced to 0.19 dB. Also, the MSE value of -72 dB was obtained in the proposed dcANC with FXLMS, compared with -64 dB obtained from scANC with FXLMS algorithm. The results of the simulation using FXLMS on both scANC and dcANC showed that the performance of the dcANC is comparatively better in term of the stated performance metrics.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69683364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MICROWAVE MANUFACTURE OF GLASS FOAM BY COMBINED USE OF GRAPHITE AND CALCIUM CARBONATE AS FOAMING AGENTS 石墨和碳酸钙复合发泡剂微波制备玻璃泡沫

Journal of Engineering Studies and Research Pub Date : 2021-06-08 DOI: 10.29081/jesr.v27i1.260

L. Paunescu, S. Axinte, M. Drăgoescu, B. Păunescu, F. Cosmulescu

引用次数: 0

INVESTIGATING POINTS-OF-GENERATION POWER LOSSES ON THE NIGERIAN NATIONAL GRID FOLLOWING UNBUNDLING OF THE ELECTRIC UTILITY INDUSTRY 调查公用事业行业分拆后尼日利亚国家电网的发电点电力损失

Journal of Engineering Studies and Research Pub Date : 2021-06-08 DOI: 10.29081/jesr.v27i1.259

Ajewole Titus Oluwasuji, Olabode Olakunle Elijah, Okakwu Ignatius Kema, Egbedinni Olakunle Femi

{"title":"INVESTIGATING POINTS-OF-GENERATION POWER LOSSES ON THE NIGERIAN NATIONAL GRID FOLLOWING UNBUNDLING OF THE ELECTRIC UTILITY INDUSTRY","authors":"Ajewole Titus Oluwasuji, Olabode Olakunle Elijah, Okakwu Ignatius Kema, Egbedinni Olakunle Femi","doi":"10.29081/jesr.v27i1.259","DOIUrl":"https://doi.org/10.29081/jesr.v27i1.259","url":null,"abstract":"Aside from the domino effects of being radial in structure, the Nigerian national electric grid is currently suffering from deteriorated infrastructures and unpredictable fuel supply for power generation. Massive introduction of green energy-based microgrid alternatives has been proposed as a major means of resolving the challenges. Such paradigm shift needs to be substantiated within the context of the present situation of the grid, for the consumption of policy makers and implementers, hence; the performance of the generation sub-system of the grid in the post-deregulation era is evaluated in this study. Two-year numerical data on the operational capacities of the twenty-nine power plants that are currently connected to the grid are employed to profile the behaviours of the plants over the period. Yearly averages of the three operational capacities of each plant are estimated, and by comparing the respective capacities, generation losses are computed for each of the plants. With 5,063.8 MW yearly average generation capacity in the year 2018, a loss of 61.02 % was experienced on the sub-system; while the generation loss was 61.55 % in the year 2019 that has yearly average generation capacity of 5,062.5 MW. For the two years combined, the average generation capacity is 5,063.2 MW at 61.36 % power loss. These estimations reveal that the pre-deregulation loss profile of the generation sub-system has not been curtailed despite the unbundling of the electric power industry. Generation loss has rather persisted and keeps taking a heavy toll on the electric utility market of the country. Significant deployment of renewable electricity microgrid is therefore required to provide enduring solution.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41353039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

OPTIMIZATION OF THE MICROELECTROMECHANICAL PROPERTIES OF HEAT EXCHANGE SYSTEMS THROUGH MICROCHANNEL TECHNOLOGY 利用微通道技术优化换热系统的微机电性能

Journal of Engineering Studies and Research Pub Date : 2021-06-08 DOI: 10.29081/jesr.v27i1.261

Sarder S. Shakher, K. O. Bonsu

引用次数: 0

DAYLIGHT INVESTIGATION IN CAMPUS LECTURE THEATERS. CASE STUDY: SOUTH WEST COAST UNIVERSITY OF NIGERIA 白天在校园演讲厅进行调查。案例研究:尼日利亚西南海岸大学

Journal of Engineering Studies and Research Pub Date : 2021-06-08 DOI: 10.29081/jesr.v27i1.258

O. Olayinka, Makanju Tolulope

引用次数: 0

GREY WOLF OPTIMIZER BASED OPTIMAL PLACEMENT OF MULTIPLE FACTS DEVICES IN THE TRANSMISSION SYSTEM UNDER DYNAMIC LOADING SYSTEM 基于灰狼优化算法的动态负载下传动系统中多工况装置的优化布置

Journal of Engineering Studies and Research Pub Date : 2021-06-08 DOI: 10.29081/jesr.v27i1.262

Yusuf Samuel Sunday, Okorie Patrick Ubeh, A. Saidu, Alhassan Fahad

{"title":"GREY WOLF OPTIMIZER BASED OPTIMAL PLACEMENT OF MULTIPLE FACTS DEVICES IN THE TRANSMISSION SYSTEM UNDER DYNAMIC LOADING SYSTEM","authors":"Yusuf Samuel Sunday, Okorie Patrick Ubeh, A. Saidu, Alhassan Fahad","doi":"10.29081/jesr.v27i1.262","DOIUrl":"https://doi.org/10.29081/jesr.v27i1.262","url":null,"abstract":"The application of grey wolf optimization technique for multiple FACTS placement is presented in this paper for the reduction of total system losses and minimization of voltage deviation via optimal placement of Flexible AC Transmission System (FACTS) device. Grey wolf optimization (GWO) technique is inspired by social hierarchy and hunting behaviour of wolves and offers a right balance between exploration and exploitation during the search for global optimal. Series-shunt FACTS device; unified power flow controller (UPFC) is considered as a formidable device that can provides an alternative option for the flexible controllability and improvement of power transfer capability of a transmission lines. The analyses were conducted by increasing the number of UPFC in the network in order to evaluate the optimal number of FACTS devices that would give the least loss under maximum loading and contingency conditions. The efficacy of this proposed technique is demonstrated on 31-bus, 330 kV Nigeria National Grid (NNG) using MATLAB environment. The results show that optimal placement of FACTS device along with optimization technique provides a promising solution to the high power loss and voltage deviation bedevilling Nigeria National Grid.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45397895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

AN ASSESSMENT OF THE DISPLACEMENT OF A CAM FOLLOWER USING REGULA FALSI METHOD 用正则误差法评估凸轮从动件的位移

Journal of Engineering Studies and Research Pub Date : 2021-06-08 DOI: 10.29081/jesr.v27i1.255

K. Oladejo, D. Adetan, A. Oke, R. Abu, Ganiu Ayoola Lamid

{"title":"AN ASSESSMENT OF THE DISPLACEMENT OF A CAM FOLLOWER USING REGULA FALSI METHOD","authors":"K. Oladejo, D. Adetan, A. Oke, R. Abu, Ganiu Ayoola Lamid","doi":"10.29081/jesr.v27i1.255","DOIUrl":"https://doi.org/10.29081/jesr.v27i1.255","url":null,"abstract":"Cam is a mechanical component that transforms circular motion to reciprocating motion by using mating component, called the follower. The principal aim of this work was to study and analyse the displacement of a cam-follower with Regula Falsi method and verify its input by using MATLAB and FORTRAN simulations. A study was conducted on angle of rotation and the displacement of the follower, which is equal to the radius of the cam given as transcendental equation to find the exact solution. The parameters such as initial guess, final guess, iteration counter and the desired displacement are involved in finding the angular displacement to the cam system in high speed rotation. The analysis was done using a computer programming that enables verification of the results obtained and ascertaining whether the inputs are correct or not for the displacement in cam follower system. The computer output showed results of the two data sets that yielded solutions and two that did not. The results revealed that the programme could be used to find the angular displacement corresponding to a given follower displacement for any cam; if the function CAMF is modified to include the appropriate radius function, r(x). The results further revealed that at a halve cycle of a rotating cam, which is equivalent to (x = 3.142 rad), is a solution that would provide the desired displacement of the follower (opening and closing of valves).","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44554609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0