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

An Analysis of SiC Power Electronics Implementation in Green Energy Based Extremely Fast Charging 基于绿色能源的极快充电SiC功率电子实现分析

Journal of Engineering Research and Sciences Pub Date : 2022-05-01 DOI: 10.55708/js0105024

Naireeta Deb, Rajendra Singh

{"title":"An Analysis of SiC Power Electronics Implementation in Green Energy Based Extremely Fast Charging","authors":"Naireeta Deb, Rajendra Singh","doi":"10.55708/js0105024","DOIUrl":"https://doi.org/10.55708/js0105024","url":null,"abstract":"Existing extremely fast charging (XFC) of electrical vehicles (EVs) is based on silicon power electronics and internal conversion of AC power into DC power. In this paper it has been shown that silicon carbide power electronics and the use of DC power source in the design of XFC of EVs has many distinct advantages over current XFC of EVs. Silicon carbide power electronics provide reduction of charging time, higher power conversion efficiency, size reduction of heat sink and improved battery’s state of health. The use of larger size silicon carbide wafers will further reduce the cost of power electronics based on silicon carbide. Use of green energy sources (solar and wind) and lithiumion batteries for electrical power storage can provide end to end DC power network. Such networks combined with silicon carbide based XFC of EVs can play a revolutionary role in saving green electrical and provide reduced of charging of EVs. This paper reports almost 50% reduction in power losses by using Silicon Carbide DC technology. End to end DC power networks combined with SiC based XFC of EVs can play a revolutionary role in solving climate emergency.","PeriodicalId":156864,"journal":{"name":"Journal of Engineering Research and Sciences","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132138494","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

Model for Assessing Mobile Business Intelligence Readiness within South African Telecommunications Industry 南非电信行业移动商务智能准备评估模型

Journal of Engineering Research and Sciences Pub Date : 2022-05-01 DOI: 10.55708/js0105022

Philip Marothi Lemekwane, N. Ruxwana

{"title":"Model for Assessing Mobile Business Intelligence Readiness within South African Telecommunications Industry","authors":"Philip Marothi Lemekwane, N. Ruxwana","doi":"10.55708/js0105022","DOIUrl":"https://doi.org/10.55708/js0105022","url":null,"abstract":"To determine what needs to be done, organisations throughout the world need the capability to find out quickly, what is happening and why it happened. Therefore, having the intelligence to make informed decisions at the right time and place is the key to success in today's dynamic environment. As mobile systems become increasingly available, more accessible, and better performing, data gathering and analysis can be performed off-site and on-site with greater flexibility, in turn extending Business Intelligence (BI) to mobile devices, commonly known as Mobile Business Intelligence (MBI). However, the MBI implementations remain unexplored and unsupported even with the sturdy increase in mobile technology adoption, especially in developing world like South Africa where it is the most viable option. The study aims to establish the MBI readiness factors and developed a model for these organisations to assess their MBI readiness, using South African telecommunications industry as a case. The study employed quantitative research approach, where a closed-ended questionnaires were used as the primary data collection method. Finding suggest a number of key factors significant to MBI readiness in context including Culture, Enterprise Mobility, Organisational Capability, Infrastructure, Security, Skills, Support, etc. The MBI readiness model and its validated elements provide a new way of identifying and verifying critical factors for MBI.","PeriodicalId":156864,"journal":{"name":"Journal of Engineering Research and Sciences","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129703765","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

Machine Learning Aided Depression Detection in Community Dwellers 机器学习辅助社区居民抑郁检测

Journal of Engineering Research and Sciences Pub Date : 2022-05-01 DOI: 10.55708/js0105002

Vijay Kumar, Muskan Khajuria, Anshu Singh

引用次数: 0

IEEE Invited Paper - An Overview of Cyber Security Considerations and Vulnerabilities in Critical Infrastructure Systems and Potential Automated Mitigation - A Review IEEE特邀论文-关键基础设施系统中的网络安全考虑和漏洞以及潜在的自动化缓解概述-综述

Journal of Engineering Research and Sciences Pub Date : 2022-04-01 DOI: 10.55708/js0104002

R. Mazzolin, Asad Madni

引用次数: 0

Resonant Radiation of Boundary with a Travelling Distribution of the Field 具有场行进分布的边界共振辐射

Journal of Engineering Research and Sciences Pub Date : 2022-04-01 DOI: 10.55708/js0104001

V. Arabadzhi

{"title":"Resonant Radiation of Boundary with a Travelling Distribution of the Field","authors":"V. Arabadzhi","doi":"10.55708/js0104001","DOIUrl":"https://doi.org/10.55708/js0104001","url":null,"abstract":": The problem of acoustic monochromatic radiation by boundary with a traveling distribution of phases of normal vibrational velocities is considered. It is shown that when the spatial frequency of the traveling phase of normal velocities approaches the wave number in the medium, the energy transfer from boundary into a “sliding” (with respect to the boundary) sound wave can resonantly increase to a value many times greater than the energy transfer from of the in-phase boundary, correspondingly, into the normal one (with respect to the boundary) sound wave at the same modules of amplitudes of vibrational velocities of boundary. In addition, the resonant energy transfer of the boundary into a \"sliding\" wave is the greater, the larger the wave dimensions of the radiating pattern on boundary. It is shown that when a similar traveling distribution of sound pressure (instead normal velocity) is specified at the boundary, there is no resonance. The influence of the curvature of the radiating boundary on the above phenomenon of resonant radiation was studied. It is shown that the resonant radiation of the boundary with given running phases of normal velocities generates a tangential (with respect to the boundary) constant in time radiation reaction force. It is shown that for the case of a linear chain of equidistant monopoles (or pulsing spheres separated from each other by medium) with a traveling phase (a traveling wave antenna) of their oscillatory velocities, the resonance does not appear.","PeriodicalId":156864,"journal":{"name":"Journal of Engineering Research and Sciences","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127857441","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

Study on Stability Analysis of Rectangular Plates Section Using a Three-Dimensional Plate Theory with Polynomial Function 用多项式函数三维板理论分析矩形板截面的稳定性

Journal of Engineering Research and Sciences Pub Date : 2022-04-01 DOI: 10.55708/js0104004

F. Onyeka, C. Nwa-David, T. E. Okeke

{"title":"Study on Stability Analysis of Rectangular Plates Section Using a Three-Dimensional Plate Theory with Polynomial Function","authors":"F. Onyeka, C. Nwa-David, T. E. Okeke","doi":"10.55708/js0104004","DOIUrl":"https://doi.org/10.55708/js0104004","url":null,"abstract":": In this paper, a polynomial displacement function is developed to evaluate the stability of rectangular thick plate that is freely supported at the third edge and other three edges simply supported (SSFS). Employing three-dimensional (3-D) constitutive relations which consist of entire stress components, the functional for total potential energy was obtained. The governing equations plate was obtained through the variation of the 3-D theory of elasticity to get the slope and deflection relations. The solution of equilibrium equations gives an exact polynomial deflection and rotation function which was gotten after replacement of the variables of total potential energy while the solution of the governing equation gave the expression for the deflection coefficient of the plate. The direct variation method through deflection coefficient was applied to get the formula for calculation of the critical buckling load. Furthermore, the model followed strictly from the first principle of 3-D theory of elasticity without state of stress assumption through the thickness axis of the plate, so that it is able to eliminate the stress under-estimation problem from the approximation and 2-D refined plate theory approach, when the thickness becomes thicker. The result of the present study using the established 3-D model yields an exact solution which shows that it can be used with confidence in the stability analysis of any type of plate boundary condition.","PeriodicalId":156864,"journal":{"name":"Journal of Engineering Research and Sciences","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127552279","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: 3

Image Processing and Data Storage for Fire Alarm 火灾报警图像处理与数据存储

Journal of Engineering Research and Sciences Pub Date : 2022-04-01 DOI: 10.55708/js0104012

Muhammad Zia Ur Rahman, S. Waseem, S. Riaz, Z. Riaz, Aneeq Asif, Ayesha Saddiqa, Ali Asghar

引用次数: 0

Effective Approach Experience for Practical Training using Web-Based Platforms and Tools in the Context of the COVID-19 Pandemic COVID-19大流行背景下使用网络平台和工具进行实践培训的有效方法经验

Journal of Engineering Research and Sciences Pub Date : 2022-04-01 DOI: 10.55708/js0104003

Radoslav Hrischev

引用次数: 0

Design and Analysis of Flat Belt Conveyor for Segregation of Defective Products 不良品分离扁平带式输送机的设计与分析

Journal of Engineering Research and Sciences Pub Date : 2022-04-01 DOI: 10.55708/js0104008

Y. Patil, Shivraj Patil, Suhas Gawade, Vaishnavi Shinde, S. Jawade

{"title":"Design and Analysis of Flat Belt Conveyor for Segregation of Defective Products","authors":"Y. Patil, Shivraj Patil, Suhas Gawade, Vaishnavi Shinde, S. Jawade","doi":"10.55708/js0104008","DOIUrl":"https://doi.org/10.55708/js0104008","url":null,"abstract":": Belt conveyor system is mostly used in industries for transportation of raw materials and finished products. This paper includes study of detailed design procedure and analysis of flat belt conveyor components for light duty applications. Belt conveyors used for segregation of defective products up to 2 kg maximum load whose conveyor capacity is 2 TPH and speed of the conveyor will be 3.5 m/min. Our paper includes study of design calculation of conveyor and FEA analysis of pulley, shaft and conveyor belt. 3D model is created using solid work software. FEA is done on ANSYS and Inventor software with appropriate loading condition, considering calculated tension. Stress analysis of shaft, pulley and belt is done to find highest stressed area of belt conveyor. By following the design procedure for flat belt conveyor system, all geometrical parameters obtained are within limits and design of conveyor is safe. In FEA, contact status and contact pressure between belt and pulleys are properly sticky and in contact. Max stress acting on belt is 58.85 MPa and deformation will occur at 87.88 MPa. Stress on shaft comes out to be 13.17 MPa.","PeriodicalId":156864,"journal":{"name":"Journal of Engineering Research and Sciences","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134319925","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

An Extreme Learning Machine for Blood Pressure Waveform Estimation using the Photoplethysmography Signal 利用光电容积脉搏波信号估计血压波形的极限学习机

Journal of Engineering Research and Sciences Pub Date : 2022-04-01 DOI: 10.55708/js0104018

G. Tapia, Rodrigo F. Salas, Matías Salinas, C. Saavedra, A. Veloz, Alexis Arriola, S. Chabert, A. Glaria

{"title":"An Extreme Learning Machine for Blood Pressure Waveform Estimation using the Photoplethysmography Signal","authors":"G. Tapia, Rodrigo F. Salas, Matías Salinas, C. Saavedra, A. Veloz, Alexis Arriola, S. Chabert, A. Glaria","doi":"10.55708/js0104018","DOIUrl":"https://doi.org/10.55708/js0104018","url":null,"abstract":": Blood Pressure (BP) waveform is a result of the response of the arteries to the blood ejection produced by the heart and, therefore, it is an important indicator of the state of the cardiovascular system. Currently, its measurement is performed invasively in critically ill patients who need a continuous and real time monitoring of their treatment response, however, it is possible to measure the BP, continuously and non-invasively, in non-critical patients to detect, monitor and control possible hypertensive events. Nevertheless, current non-invasive techniques can cause discomfort in patients and they are not used in critically ill patients. Consequently, non-Invasive and minimally-Intrusive methodologies (nImI) are required to estimate BP and its waveform. In the current study, the performance of machine learning algorithms, speciﬁcally the Extreme Learning Machine (ELM) algorithm, is evaluated to estimate both Blood Pressure and its waveform from the Photoplethysmography (PPG) signal and its ﬁrst derivative’s (VPG) waveforms. A total of 15 healthy volunteers participated in this study. They performed two handgrips, which is isometric maneuver to induce controlled BP rises. The ﬁrst handgrip is used to train ELM and the second handgrip is used to test the ELM. Our results show that there are high correlation performances ( 0 . 98 ) between the estimated and measured BP waveforms, and a relative error of 3 . 3 ± 1 . 4% . An arterial volume-clamp at the middle ﬁnger is used as the gold-standard measurement. Meanwhile, BP extreme values estimations, Systolic BP (SBP) and Diastolic BP (DBP), are also performed. ELMs have a performance with an average RMSE of 5 . 9 ± 2 . 7 mmHG for SBP and 4 . 8 ± 2 . 0 mmHg for DBP and, an average relative error of 5 . 0 ± 2 . 7% for SBP and 7 . 0 ± 4 . 0% for DBP.","PeriodicalId":156864,"journal":{"name":"Journal of Engineering Research and Sciences","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129119779","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