European Journal of Engineering Research and Science最新文献_第8页

The Contribution to the Development of a Two-Dimensional Asymptotic Theory of the Three-Point Bending Behaviour of Multi-Layered Beams: Applications to Orthotropic Phase Sandwich Beams 对多层梁三点弯曲行为二维渐近理论发展的贡献:在正交各向异性相夹心梁中的应用

European Journal of Engineering Research and Science Pub Date : 2020-10-09 DOI: 10.24018/ejers.2020.5.10.2168

A. D. Pagui, A. Foudjet, J. S. T. Mabekou, T. Ekoume, P. K. Talla

引用次数: 0

4D Printing and Characterization of Shape Memory Polymer (SMP) Based Smart Gripper 基于形状记忆聚合物(SMP)的智能夹持器的4D打印与表征

European Journal of Engineering Research and Science Pub Date : 2020-10-09 DOI: 10.24018/ejers.2020.5.10.2174

Francis Irungu Maina, Nahashon O. Osinde, Japheth Ka’pesha Odira, P. Wanjiru, M. Mwangi

{"title":"4D Printing and Characterization of Shape Memory Polymer (SMP) Based Smart Gripper","authors":"Francis Irungu Maina, Nahashon O. Osinde, Japheth Ka’pesha Odira, P. Wanjiru, M. Mwangi","doi":"10.24018/ejers.2020.5.10.2174","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.10.2174","url":null,"abstract":"Shape Memory Polymer (SMP) is stimuli-responsive material with the ability to recover the original shape from a deformation upon triggering by an appropriate stimulus like heat, light, and electricity. The shape recovery properties can be harnessed through 4D printing of self-recoverable functional structures and made usable in fields like medicine and robotics. To investigate the recovery properties, best printing parameters and optimal sizes, 4D reconfigurable gripper designed in CAD was printed in Ultimaker 2 Printer. Different stencils were made in varying printing parameters of temperature, infill, speed and time. Analysis for the stencils proved best print quality at a temperature of 195 °C and nozzle retract speed of 40mm/s. Shape recovery characterization was done on MATLAB. A printing temperature of 203 °C, infill density of 38% and printing speed of 40 mm/s gave the gripper with the best print quality. Characterization of the varying performances of the four grippers was attributed to the different infill percentages. The lower the infill, the higher the recovery rate due to the low stiffness of the gripper. The best recovery rate of 96.93% was associated with an optimal printing temperature of 203 °C.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83141631","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

Experimental Study of Mean Flow Characteristics in the Near Field of Wedge-Shaped Swirling Jets 楔形旋流射流近场平均流动特性的实验研究

European Journal of Engineering Research and Science Pub Date : 2020-10-09 DOI: 10.24018/ejers.2020.5.10.2176

M. Hossain, Muhammed Hasnain Kabir Nayeem, Abu Taher Ali

引用次数: 0

Development of African Locust Bean (Parkia Biglobosa) Depulping Machine 非洲刺槐豆脱浆机的研制

European Journal of Engineering Research and Science Pub Date : 2020-10-08 DOI: 10.24018/ejers.2020.5.10.1832

W. Akinfiresoye, A. Akintade, S. Fasoyin

{"title":"Development of African Locust Bean (Parkia Biglobosa) Depulping Machine","authors":"W. Akinfiresoye, A. Akintade, S. Fasoyin","doi":"10.24018/ejers.2020.5.10.1832","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.10.1832","url":null,"abstract":"The traditional method of using hands to depulp African Locust Bean (ALB) inside a flowing river led to the conception and development of a simple operated 3 kg capacity ALB depulping machine at the Farm Power and Machinery Workshop of Agricultural and Bio-Environmental Engineering, Rufus Giwa Polytechnic, Owo, Ondo State, Nigeria. The depulping machine has the hopper, the depulping unit which has the shaft carrying paddles to beat off the seed from the pulp, the frame, the water reservoir to aid the process and 2.2 kW power unit. ALB of moisture contents 60%, 71% and 78% were depulp at machine speed of 173 rpm. The time taken for each operation to be completed was taken. It was discovered that the machine performance in terms of efficiency and throughput increases as the moisture content of the ALB increases while the specific mechanical energy decreases as the moisture content increases. At moisture content of 78%, the efficiency of the depulping machine was 83%, the throughput was about 236 kg/h and the specific mechanical energy was 122.32 KG/KJ. The cost of the machine was Seventy Eight Thousand Naira (NGN 78,000:00). It is recommended for small and medium ALB farmers.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85812074","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

Smart Intrusion Detection System Comprised of Machine Learning and Deep Learning 基于机器学习和深度学习的智能入侵检测系统

European Journal of Engineering Research and Science Pub Date : 2020-10-08 DOI: 10.24018/ejers.2020.5.10.2128

S. Istiaque, Asif Iqbal Khan, S. Waheed

{"title":"Smart Intrusion Detection System Comprised of Machine Learning and Deep Learning","authors":"S. Istiaque, Asif Iqbal Khan, S. Waheed","doi":"10.24018/ejers.2020.5.10.2128","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.10.2128","url":null,"abstract":"In the present world, digital intruders can exploit the vulnerabilities of a network and are capable to collapse even a country. Attack in Estonia by digital intruders, attack in Iran's nuclear plant and intrusion of spyware in smart phone depicts the efficiency of attackers. Furthermore, centralized firewall system is not enough for ensuring a secured network. Hence, in the age of big data, where availability of data is huge and computation capability of PC is also high, there machine learning and network security have become two inseparable issues. \u0000In this thesis, KDD Cup’99 intrusion detection dataset is used. Total 3, 11,030 numbers of records with 41 features are available in the dataset. For finding the anomalies of the network four machine learning methods are used like Classification and Regression Tree (CART), Random Forest, Naive Bayes and Multi-Layer Perception. Initially all 41 features are used to find out the accuracy. Among all the methods, Random Forest provides 98.547% accuracy in intrusion detection which is maximum, and CART shows maximum accuracy (99.086%) to find normal flow of data. Gradually selective 15 features were taken to test the accuracy and it was found that Random Forest is still efficient (accuracy 98.266%) in detecting the fault of the network. In both cases MLP found to be a stable method where accuracy regarding benign data and intrusion are always close to 95% (93.387%, 94.312% and 95.0075, 93.652% respectively). \u0000Finally, an IDS model is proposed where Random Forest of ML method and MLP of DL method is incorporated, to handle the intrusion in a most efficient manner.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"120 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90594967","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

Optimization of an Autonomous Hybrid Power System for an Academic Institution 某院校自主混合动力系统的优化设计

European Journal of Engineering Research and Science Pub Date : 2020-10-08 DOI: 10.24018/ejers.2020.5.10.2157

U. A. Dodo, E. Ashigwuike, N. Gafai, Emmanuel M. Eronu, Abdullahi Yusuf Sada, Mustapha Alhaji Dodo

{"title":"Optimization of an Autonomous Hybrid Power System for an Academic Institution","authors":"U. A. Dodo, E. Ashigwuike, N. Gafai, Emmanuel M. Eronu, Abdullahi Yusuf Sada, Mustapha Alhaji Dodo","doi":"10.24018/ejers.2020.5.10.2157","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.10.2157","url":null,"abstract":"The epileptic power supply in Nigeria is enormously impeding universities’ administrative, academic, and research activities. The diesel generators on which most of these institutions rely as alternative power sources during grid failures are not viable solutions as the grid outage is incessant and the duration usually lasts for hours, at times for days. The effects of these are high running costs and increased environmental pollution. If normal activities in the universities are to continue unhindered and to reduce the health risks associated with the fossil-based generators, there is the need to explore other alternatives such as utilizing the environmentally-friendly, free and abundant renewable resources to meet their electricity demands. The present study uses Hybrid Optimization of Multiple Energy Resources (HOMER) to evaluate two different configurations of a stand-alone diesel generator (DG) system and a hybrid solar photovoltaic(PV)-diesel generator(DG)-battery energy storage (BES) system for sustainable power supply to the Baze University Abuja, Nigeria. The net present cost and levelized cost of energy, operating cost, and carbon dioxide emission of the hybrid PV-DG-BES system are lower by 50%, 30.93%, and 90% respectively when compared to the stand-alone DG system. Therefore, a hybrid solar PV-DG-BES system is a suitable technology to sustainably power the University.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86357287","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

The Impact of Guinea Corn Husk Ash as an Admixture for Crack Control in Concrete 玉米壳灰分掺合料对混凝土裂缝控制的影响

European Journal of Engineering Research and Science Pub Date : 2020-10-07 DOI: 10.24018/ejers.2020.5.10.2171

Peter I. Aburime, E. Ndububa, David O. Kpue

{"title":"The Impact of Guinea Corn Husk Ash as an Admixture for Crack Control in Concrete","authors":"Peter I. Aburime, E. Ndububa, David O. Kpue","doi":"10.24018/ejers.2020.5.10.2171","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.10.2171","url":null,"abstract":"Guinea corn husk, a post-harvest agricultural waste common in Northern Nigeria is often heaped up constituting environmental nuisance. Guinea Corn Husk Ash (GCHA) is an incinerated by-product of it. In this experimental investigation, it was used to replace cement in concrete at levels of 0%, 5%, 10%, 20%, 30% and 40% by weight. The sample cubes were casted and cured for 3, 14, 28 and 56 days before crushing. Before then, the chemical constituents of the GCHA were determined from an X-Ray diffraction analyzer. The oxides found in the ash included SiO2 (85.4%), K2O (4.01%), Fe2O3 (0.64%), CaO (2.04%) and NaO2 (0.98%). SO3 and AI2O3 were not detected. The combined percent of SiO2, Al2O3 and Fe2O3 of 86.04% is above the 70% benchmark for a pozzolana material. Also, SO3 and NaO2 fell below the maximum allowable values of 4% and 1.5% respectively. The fresh concrete had slump values that ranged from 11mm for 0% cement replacement to 3.6mm for 40% replacement. The hard concrete had the highest compressive strength value of 23.67 N/mm2 for plain concrete and 49.3 N/mm2 at 5% GCHA replacement level. All were at 56 days of curing, satisfying quality for heavy load bearing. Beam samples cured for 3, 14, 28 and 56 days were subjected to flexural tests until they developed cracks. The cracks were measured for lengths (CRL) and width (CRW) for different replacement levels and curing days with a crack measuring microscope. The results show that, at 14days curing, there is a trend in the crack values’ reduction for the hardened GCHA concrete. This trend is also marginally seen for the 28 day cured samples, particularly at up to 20% replacement levels. The decrease in crack values were up to 17.2% and 2091% for CRL and CRW respectively. However, there were no significant crack controls with samples of higher replacement levels and those cured for 3 and 56 days. GCHA concrete can therefore be used to for heavy load bearing structures and for crack control at 5 – 20% replacement levels when cured for 14 days and 38 days.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75043291","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

Aliphatic Hydrocarbons Extraction from Oily Sludge using Kerosene 用煤油从油泥中提取脂肪族烃

European Journal of Engineering Research and Science Pub Date : 2020-10-02 DOI: 10.24018/ejers.2020.5.10.1880

Ndjeumi Chrisdel Chancelice, Ze Bilo’o Philémon, Mouthe Anombogo Ghislain Arnaud, N. M. Benoît

引用次数: 1

Estimation of Aquifer Protective Capacity, Soil Corrosivity and Dar-Zarrouk Parameters in Kaura Area of Kaduna State, Nigeria 尼日利亚卡杜纳州Kaura地区含水层保护能力、土壤腐蚀性和Dar-Zarrouk参数估算

European Journal of Engineering Research and Science Pub Date : 2020-10-02 DOI: 10.24018/ejers.2020.5.10.2108

I. Olaniyan

{"title":"Estimation of Aquifer Protective Capacity, Soil Corrosivity and Dar-Zarrouk Parameters in Kaura Area of Kaduna State, Nigeria","authors":"I. Olaniyan","doi":"10.24018/ejers.2020.5.10.2108","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.10.2108","url":null,"abstract":"This study presents an estimation of aquifer protective capacity, soil corrosivity and Dar-Zarrouk parameters for Kaura area of Kaduna State in northern Nigeria. Electrical resistivity sounding data and borehole pumping test data obtained from 20 locations within the LGA were obtained and used for this study. The geoelectric data exhibited curve types generally consisting of H, HA, KH or K-A-H types from which five-layer lithology were delineated across the entire study area. Well yield varies from 16 – 400 litres/min, pumping rate ranges from 16 to 140 l/min, drawdown varies from 1 – 22m, while specific capacity ranged from 1 – 95 litres/min. The aquifer protective capacity characterization was based on values of longitudinal unit conductance of the overburden, and 35% of the locations showed good protective capacity, while the remaining 65% exhibited moderate protective capacity. From the soil corrosivity evaluation, the upper soil layers were classified as moderately corrosive at one location, four locations were marked as slightly corrosive, while the remaining locations were found to be practically non-corrosive. Based on thicknesses and resistivities of the overburden layers, Dar-Zarrouk parameters were determined. The reflection coefficient ranged from 0.29 to 0.92, resistivity contrast occurred between 0.35 to 25.38, while the coefficient of anisotropy ranged from 0.70 to 3.84 with mean value of 1.57. Values above 1.0 are generally considered high and they occurred more toward the western part of the area than the middle and eastern parts. Both the longitudinal unit conductance map and coefficient of anisotropy map were generated for the area.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":"123 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76173502","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: 1

Evaluation and Modelling of a Low Budget Hall Effect Based Flow-Rate Sensor using Adaptive Calibration Paradigm 基于自适应校准范式的低预算霍尔效应流量传感器评估与建模

European Journal of Engineering Research and Science Pub Date : 2020-09-30 DOI: 10.24018/ejers.2020.5.9.2154

Emmanuel M. Eronu, Moses Odiagbe

引用次数: 0