The Journal of Engineering Research最新文献_第3页

تأثير اللون والضوء على الفراغات السکنية الداخلية 颜色和光对内部塞的的影响

The Journal of Engineering Research Pub Date : 2021-03-27 DOI: 10.21608/ERJENG.2021.69479.1008

Reem ElBeshkar

引用次数: 0

Using the Brink Depth in Discharge Measurement for Inverted Semicircular Open Channels 利用边缘深度测量倒半圆明渠流量

The Journal of Engineering Research Pub Date : 2021-03-26 DOI: 10.21608/ERJENG.2021.68393.1007

Reham Zeidan, M. Elshemy, I. Rashwan

引用次数: 0

Point Load Index of Rocks Exposed to High Thermal Effect 高热效应作用下岩石点荷载指数

The Journal of Engineering Research Pub Date : 2021-03-25 DOI: 10.21608/ERJENG.2021.65559.1004

M. Labeeb

引用次数: 0

A computational fluid dynamics study on different solar chimney designs on solar radiation 不同太阳烟囱设计对太阳辐射的计算流体力学研究

The Journal of Engineering Research Pub Date : 2021-03-18 DOI: 10.21608/ERJENG.2021.68331.1006

Mohamed Ramon

{"title":"A computational fluid dynamics study on different solar chimney designs on solar radiation","authors":"Mohamed Ramon","doi":"10.21608/ERJENG.2021.68331.1006","DOIUrl":"https://doi.org/10.21608/ERJENG.2021.68331.1006","url":null,"abstract":"The solar chimney power plant (SCPP) is a hopeful solution to produce electrical power from solar energy. In this paper, a 2D numerical study is presented to estimate the performance of the SCPPs while varying the collector angle, chimney diverging angle, variable solar radiation and ambient temperature and some geometrical designs. Numerical models run with solar load discrete ordinates (DO) and realizable k-ɛ turbulence models. System is defined by the collector height =50 mm, the chimney diameter =160 mm, the collector diameter =2750 mm and the chimney height =3000 mm. its investigated for each case the profile of magnitude velocity, air temperature, pressure, incident radiation and turbulence characteristics were presented. The effective choice of the best geometry is based on the maximum value of the air velocity inside the SCPP. Results indicates that a negative collector-roof positively increases the air velocity, and the output power. To a specific limit, increasing the diverging angle of the chimney has a god effect on the velocity magnitude and the other parameters. also Increasing the collector diameter and chimney height and diameter has a great effect on power output as","PeriodicalId":31979,"journal":{"name":"The Journal of Engineering Research","volume":"10 1","pages":"0-0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78972328","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

تحقيق الأصالة في مشروعات إعادة الاعمار لمواقع التراث العالمي الثقافي المتضررة من الحروب والنزاعات 实现受战争和冲突影响的世界文化遗产遗址重建项目的独创性

The Journal of Engineering Research Pub Date : 2021-03-13 DOI: 10.21608/ERJENG.2021.61048.1003

Fifi Mohamed, Nermin Omar, Ayman Abd El Tawab

引用次数: 0

Improving intermittent demand forecasting based on data structure 改进基于数据结构的间歇性需求预测

The Journal of Engineering Research Pub Date : 2021-02-23 DOI: 10.36909/JER.V9I1.8667

S. Faghidian, M. Khashei, M. Khalilzadeh

{"title":"Improving intermittent demand forecasting based on data structure","authors":"S. Faghidian, M. Khashei, M. Khalilzadeh","doi":"10.36909/JER.V9I1.8667","DOIUrl":"https://doi.org/10.36909/JER.V9I1.8667","url":null,"abstract":"Spare parts are among the most important and challenging fields for the intermittent demand forecast. Improving the accuracy of the forecasted results can improve the efficiency of the inventory control system as well as the adoption of beneficial strategic decisions in the face of the uncertainty inherent in the demand. The effectiveness of hybrid forecast models in predicting the stable and accurate results has made them a useful tool in counteracting the uncertainty and complexities of the time series structure. In the present study, a hybrid model will be introduced for forecasting the intermittent demand that can impressively overcome the limitations of individual models while simultaneously using the unique advantages of these models in dealing with the complexities in the intermittent demand. The accuracy in the forecasting ability is also increased by suitable examination of the structures and patterns in the intermittent data. The research modeling was done based the Croston's method. The proposed hybrid model is based on CV2 and ADI criteria improving the efficacious of the hybrid model in examining the inappropriate structures as reducing the cost of inappropriate modeling, while increasing the prediction model accuracy. Using these results prevents the hybrid model from being confused or weakened in the modeling of all groups and reduces the risk of choosing the disproportionate model. The MAPE criterion is utilized here.","PeriodicalId":31979,"journal":{"name":"The Journal of Engineering Research","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85713563","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

Failure of an under-dip shale slope and its response under excavation conditions 下倾页岩边坡破坏及其开挖条件下的响应

The Journal of Engineering Research Pub Date : 2021-02-23 DOI: 10.36909/JER.V9I1.8111

Bin Li, Yanzhi Zhu, Fuzhou Qi, Zhenxia Yuan

{"title":"Failure of an under-dip shale slope and its response under excavation conditions","authors":"Bin Li, Yanzhi Zhu, Fuzhou Qi, Zhenxia Yuan","doi":"10.36909/JER.V9I1.8111","DOIUrl":"https://doi.org/10.36909/JER.V9I1.8111","url":null,"abstract":"A landslide occurred in the cut slope located in Chongqing Xi railway station, this slope belongs to a shale under-dip slope and has a complex failure mechanism. Some on-site investigations have been made to explore the deformation characteristics of this slope and structural geology analyses and outcomes of geological investigations in-situ are firstly described. Subsequently, the discrete element method has been employed in simulations to elucidate the deformation behavior exhibited by under-dip slopes under the long-term influence of gravity and material deterioration. The simulated deforming patterns have proven to be in strong agreement with the actual deformation at each stage. The results suggest that sliding, buckling and toppling can occur on the studied slope in the deformation process. Moreover, the progressive failure process of the slope during unloading excavation has also been simulated by the discontinuum mode UDEC. The obtained deformation and stress distribution of the slope have proven to well-match the field measurements, which verifies the practicability of the UDEC model. In addition, some reinforcement measures have been suggested and verified in the UDEC models.","PeriodicalId":31979,"journal":{"name":"The Journal of Engineering Research","volume":"166 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78077962","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

Analysis and evaluation of drop point for water jet based on wave model 基于波浪模型的水射流落点分析与评价

The Journal of Engineering Research Pub Date : 2021-02-23 DOI: 10.36909/JER.V9I1.7103

Yang Qu, Xintian Liu, Minghui Zhang, Yansong Wang, Changhong Liu

引用次数: 0

Value added usage of granular steel slag and milled glass in concrete production 粒状钢渣和磨砂玻璃在混凝土生产中的增值利用

The Journal of Engineering Research Pub Date : 2021-02-23 DOI: 10.36909/JER.V9I1.8214

Sajjad Ali, S. Iqbal, Shah Room, Ahsan Ali, Z. Rahman

{"title":"Value added usage of granular steel slag and milled glass in concrete production","authors":"Sajjad Ali, S. Iqbal, Shah Room, Ahsan Ali, Z. Rahman","doi":"10.36909/JER.V9I1.8214","DOIUrl":"https://doi.org/10.36909/JER.V9I1.8214","url":null,"abstract":"Industrial development has generated enormous conveniences for humans at the cost of environmental pollution. Cement production is a major cause of carbon dioxide emission in the construction industry and utilization of a large number of aggregates in concrete is causing scarcity of natural resources and irreversible depletion. The practice of utilizing industrial wastes in the production of concrete can be a useful solution. In this research, the green concrete of enhanced properties is produced by incorporation of milled glass as partial replacement of cement and fine aggregates are replaced by granular steel slag with different dosages. Ten types of concrete mixes substituting cement by glass powder (10%, 20% and 30%) and sand by granular steel slag (40%, 60% and 80%) were assessed in terms of rheological, mechanical and microstructural properties. Results indicated that concrete having 80% granular steel slag and 20% glass powder shows maximum increase of 42%, 16%, 16% and 14% in splitting tensile strength, flexural strength, modulus of elasticity and compressive strength respectively. Scanning electron microscopy depicts the formation of secondary calcium silicate hydrate (CSH) and improved packing density in concrete mixes having granular steel slag and glass powder. Thus, granular steel slag and glass powder can effectively be used as cement and sand replacement in the production of value-added green economical concrete and reducing environmental pollution.","PeriodicalId":31979,"journal":{"name":"The Journal of Engineering Research","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86625481","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: 6

Overview of handcrafted features and deep learning models for leaf recognition 树叶识别的手工特征和深度学习模型概述

The Journal of Engineering Research Pub Date : 2021-02-23 DOI: 10.36909/JER.V9I1.7737

Ş. Işık, Kemal Özkan

{"title":"Overview of handcrafted features and deep learning models for leaf recognition","authors":"Ş. Işık, Kemal Özkan","doi":"10.36909/JER.V9I1.7737","DOIUrl":"https://doi.org/10.36909/JER.V9I1.7737","url":null,"abstract":"In this study, an automated system for classification of leaf species based on the global and local features is presented by concentrating on a smart and unorthodox decision system. The utilized global features consist of 11 features and separated into two categories; gross shape features (7) and moment based features (4), respectively. In case of local features, only the curve points on Bezier curves are accepted as discriminative features. With the purpose of reducing the search space and improving the performance of the system, firstly the class label of leaf object is determined by conducting the global features with respect to predefined threshold values. Once the target class is determined, the local features have performed in order to assign the leaf species into a unique class. In classification stage, the k-nearest neighbor (k-nn) algorithm has utilized based on the Hausdorff distance. The proposed classification scheme provides high accuracy rate as achieving the 96.78% performance on Flavia and the 94.66% on SLID dataset. The results of the experimental study reveal that the combination of these features is more effective than preferring a single feature for leaf recognition task.","PeriodicalId":31979,"journal":{"name":"The Journal of Engineering Research","volume":"224 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76797425","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