European Journal of Engineering Research and Science最新文献_第4页

Design of Smart Hybrid Power Supply using Logic Circuits 基于逻辑电路的智能混合电源设计

European Journal of Engineering Research and Science Pub Date : 2020-12-10 DOI: 10.24018/ejers.2020.5.12.2257

Ahmed Hassanein

引用次数: 0

Application of Information and Technology in Supply Chain Management: Case Study of Artificial Intelligence – A Mini Review 信息技术在供应链管理中的应用:以人工智能为例

European Journal of Engineering Research and Science Pub Date : 2020-12-05 DOI: 10.24018/ejers.2020.5.12.2254

Hieu Bui Trong, Uyen Bui Thi Kim

引用次数: 3

Effects of Covid-19 on Crude Oil Price and Future Forecast Using a Model Application and Machine Learning Covid-19对原油价格的影响以及基于模型应用和机器学习的未来预测

European Journal of Engineering Research and Science Pub Date : 2020-12-04 DOI: 10.24018/ejers.2020.5.12.2232

A. Amadi, Orisa F. Ebube, Silas I. Aire, Chigoziri B. Marcus

{"title":"Effects of Covid-19 on Crude Oil Price and Future Forecast Using a Model Application and Machine Learning","authors":"A. Amadi, Orisa F. Ebube, Silas I. Aire, Chigoziri B. Marcus","doi":"10.24018/ejers.2020.5.12.2232","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2232","url":null,"abstract":"Oil Price has been a benchmark governing the trade of oil and gas globally. It is fixed by producing countries or countries in a consortium through organizations such as Organization of the Petroleum Exporting Countries (OPEC) or a particular mix of crude oil such as the West Texas Intermediate (WTI) or Brent. The spot price and future prices of crude oil is basically determined by demand and supply, however, some external factors can have great influence on oil price. This research work will be emphasizing on the direct and indirect effects of the COVID-19 pandemic as an external factor other than demand and supply on the benchmarks of oil pricing between 2000 and 2020. Having analyzed the various oil price fluctuation which have been caused by several factors over the years, this research went further to identify those significant factors, weigh them and input them into a model that will generate simulated oil prices of past, present and future benchmarks with relation to demand, supply, production cost and other external factors. This model was also validated using machine learning algorithms and real data of previous yearly average oil price noting the reasons for each spot price. Significant recommendations were made on the use of this model for fixing oil price benchmarks as variables to each benchmark are numerous.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85912476","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: 2

Comparing the Planck-Vacuum and Urantia-Book Depictions of the Seven-Dimensional Spacetime 比较普朗克真空和Urantia-Book对七维时空的描述

European Journal of Engineering Research and Science Pub Date : 2020-12-01 DOI: 10.24018/ejers.2020.5.12.2250

W. Daywitt

引用次数: 9

Double Beam Energy Harvester Based on PZT Piezoelectrics 基于PZT压电材料的双光束能量采集器

European Journal of Engineering Research and Science Pub Date : 2020-12-01 DOI: 10.24018/ejers.2020.5.12.2240

R. Rangel, J. M. Sobrinho, A. G. Silva, C. Souto, A. Ries

{"title":"Double Beam Energy Harvester Based on PZT Piezoelectrics","authors":"R. Rangel, J. M. Sobrinho, A. G. Silva, C. Souto, A. Ries","doi":"10.24018/ejers.2020.5.12.2240","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2240","url":null,"abstract":"This work presents a new design and performance evaluation of an energy harvester. The generator was built in the form of a double beam mechanical structure on which eight piezoelectric elements were glued and subjected to cyclic tensile and compression loads. Electrical energy is converted from mechanical vibrations generated by machines, by means of a piezoelectric material based on Lead Zirconium Titanate (PZT). Geometric dimensions of the beam structure were optimized by a finite element analysis prior to the practical construction of the device. Simulated and experimental results regarding the generator dynamics and the generated electric voltage are presented and compared. The device was evaluated for different excitations and vibration amplitudes at a frequency of 60 Hz in order to capture vibrational energy from machines at this frequency. Additionally, the generator's performance was evaluated when operating under two different real-world conditions: First, the device mounted on a condenser of an air conditioner, then on a three-phase motor pump. As a load for the piezoelectric generator, an RF circuit transmitted the ambient temperature information to a nearby computer. Correct reception of the ambient temperature value validated the ability to generate electrical power suitable for a low-power circuit. As contribution to the literature, this study demonstrates the ability of a novel piezoelectric generator design, to provide sufficient power for a circuit transmitting information from a sensor. This allows monitoring the state of a machine, using energy dissipated by mechanical vibrations in order to power the electronic systems responsible for sensing.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88957070","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

Electrochemical Evaluation of Chrysin Flavonoid as Corrosion Inhibitor for Mild Steel in Sulphuric Acid Solution 黄菊花素类黄酮在硫酸溶液中作为低碳钢缓蚀剂的电化学评价

European Journal of Engineering Research and Science Pub Date : 2020-11-30 DOI: 10.24018/ejers.2020.5.11.2247

M. Díaz, M. Valladares, E. C. Menchaca, J. Uruchurtu

引用次数: 1

Leaching Batch Test and XRD Characterized OPC Treated Lead Contaminated Soil OPC处理铅污染土壤浸出批量试验及XRD表征

European Journal of Engineering Research and Science Pub Date : 2020-11-30 DOI: 10.24018/ejers.2020.5.11.2249

Mabrouk Hassan Arhoma

引用次数: 0

The Impact of Covid-19 Pandemic on Water-Health-Food-Economy Nexus and Sustainable Development in Developing Countries 2019冠状病毒病大流行对发展中国家水-健康-食物-经济关系和可持续发展的影响

European Journal of Engineering Research and Science Pub Date : 2020-11-28 DOI: 10.24018/ejers.2020.5.11.2228

W. Joshua

{"title":"The Impact of Covid-19 Pandemic on Water-Health-Food-Economy Nexus and Sustainable Development in Developing Countries","authors":"W. Joshua","doi":"10.24018/ejers.2020.5.11.2228","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.11.2228","url":null,"abstract":"The SARS-Cov-2 pandemic has raised important concerns regarding sustainable development. With vaccines still on trial and lack of effective treatment, countries must ensure adequate measures are in place to protect and cushion the impact of the virus. In this short review, I examine the impact of SARS-CoV-2 on the Sustainable Development Goals (SDGs). I aim to achieve this by looking at how non-pharmaceutical measures like lockdown, impacts negatively on the water-health-food-economy nexus, and how it affects the realization of the SDGs. The nexus between water, food, health, and economy especially in the context of the pandemic has a strong relationship that will undermine sustainable development. I argue that a large number of people from Sub-Saharan Africa have largely been marginalized economically and socially and that despite having low numbers of positive cases, the region will significantly be impacted due to underlying issues relating to poverty, hunger, poor education and health systems. Although I project to see a relatively improved health sector due to the funds injected into the sector to curtail the pandemic, food-water-economy will drastically impact on sustainable development in the region. There is therefore the need to address the issue by adopting a measure that looks at the nexus between food, water, health, and economy. The root problem underlying the inequity in the health, water food and economic sectors, exposed by the pandemic must be addressed, not just to prepare for another pandemic but to care for people in resource-poor settings in non-pandemic times and ensure sustainable development.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87734050","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: 2

Maintenance Management Regime for Off-Grid Solar PV Renewable Energy System in Nigeria 尼日利亚离网太阳能光伏可再生能源系统维护管理制度

European Journal of Engineering Research and Science Pub Date : 2020-11-27 DOI: 10.24018/ejers.2020.5.11.2233

Zacchaeus Adesakin Adetona, J. Ogunyemi, I. Bitrus

{"title":"Maintenance Management Regime for Off-Grid Solar PV Renewable Energy System in Nigeria","authors":"Zacchaeus Adesakin Adetona, J. Ogunyemi, I. Bitrus","doi":"10.24018/ejers.2020.5.11.2233","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.11.2233","url":null,"abstract":"The perennial inadequate power supply problem in Nigeria, the worldwide call for green energy and the unavailability of grid electrical supply or difficulty in accessing it have created a need for the adoption of renewable energy such as solar PV systems. PV systems have a lifespan ranging from 10 to 25 years if well maintained but it has been observed that PV systems do not last up to their useful lifespan in Nigeria. A preliminary survey carried out showed that 71.2% of sample did not carry out any maintenance on their PV installations, 85.7% agreed that a lack of maintenance was responsible for their nonfunctional PV systems and 95% of the respondents agreed that there was a lack of maintenance on PV installations in Nigeria. A maintenance regime was developed for PV systems whereby a maintenance personnel is appointed to carry out routine or breakdown maintenance on solar panels, charge controller, battery, inverter, and cabling. The regime starts with turning off power coming from the solar panels. The maintenance of the solar panels follows; next is maintenance on all cable wiring and terminations. After all cable terminations have been checked, the battery maintenance follows. The charge controller is then checked for maintenance and subsequently, power from solar panels can be switched on to restore charging. Two protective installations were recommended in the maintenance regime namely the installation of earthing and DC circuit breakers to protect the solar system installation.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80980626","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

Assessment of Efficiency and Sustainability of Housing Plan in Khartoum 喀土穆住房计划的效率和可持续性评估

European Journal of Engineering Research and Science Pub Date : 2020-11-25 DOI: 10.24018/ejers.2020.5.11.2236

A. Elhag

引用次数: 0