Wasit Journal of Engineering Sciences最新文献_第2页

A Review of mm-wave Antenna Design at 60 GHz for 5G Applications System 面向 5G 应用系统的 60 GHz 毫米波天线设计综述

Wasit Journal of Engineering Sciences Pub Date : 2024-01-05 DOI: 10.31185/ejuow.vol12.iss1.538

Nada N. Tawfeeq, Atheed H. Sallomi

引用次数: 0

Numerical Study For Slotted And Vibrated Asymmetric Aerofoils 开槽和振动不对称气膜的数值研究

Wasit Journal of Engineering Sciences Pub Date : 2023-12-02 DOI: 10.31185/ejuow.vol11.iss3.496

Radwan M. Aljuhashy

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hybrid model to improve reference evapotranspiration prediction: Integrating ANN and PSO 混合模型来改进参考蒸散量预测：集成 ANN 和 PSO

Wasit Journal of Engineering Sciences Pub Date : 2023-12-02 DOI: 10.31185/ejuow.vol11.iss3.450

Hadeel Essa, S. Zubaidi

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GENERATION OF IDF EQUTION CASE STUDY AL- SHUWAIJA WATERSHEDS/(IRAQ-IRAN) 产生伊拉克发展基金资金案例研究 al- Shuwaija 流域/（伊拉克-伊朗）

Wasit Journal of Engineering Sciences Pub Date : 2023-12-02 DOI: 10.31185/ejuow.vol11.iss3.448

Saif Ali, Basim Sh. Abed, Mohammed Rashid

{"title":"GENERATION OF IDF EQUTION CASE STUDY AL- SHUWAIJA WATERSHEDS/(IRAQ-IRAN)","authors":"Saif Ali, Basim Sh. Abed, Mohammed Rashid","doi":"10.31185/ejuow.vol11.iss3.448","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.448","url":null,"abstract":"One of the most useful tools in water resources engineering is the Intensity-Duration-Frequency (IDF) relationship, which may be used in the planning, design, and operation of water resource projects and a wide range of engineering initiatives to mitigate the effects of flooding and torrents Al- Shuwaija in addition to the designs of rain networks within Cities nearby. \u0000 This research aims to find the curves of intensity, duration and frequency (IDF), determine the intensity of rainfall in Shuwaija, and derive an experimental method for estimating rainfall intensity. Rainfall records dating back 20 years were relied on as well as the processing of missing data for five plants. A set of tests was used for probability distributions using programs (ESY FIT, HYFRAN-PLUS), and Log-person type 3 was found to be the appropriate option for the probability distribution. For the AL- Shuwaija area, any return time with a given storm length may be predicted using a median empirical formula. The research found that the highest intensities occur over the shortest periods of time and that these intensities vary greatly with the return period, but that over longer periods, there is no fluctuation in intensities.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":"24 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138606940","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

Using Cementitious Materials to Enhance Concrete Properties and Improve the Environment: A Review 使用水泥基材料增强混凝土性能并改善环境：综述

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.482

Adil Jabbar

{"title":"Using Cementitious Materials to Enhance Concrete Properties and Improve the Environment: A Review","authors":"Adil Jabbar","doi":"10.31185/ejuow.vol11.iss3.482","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.482","url":null,"abstract":"Cement production significantly contributes to carbon dioxide emissions, which increase global warming. Therefore, reducing cement consumption can support efforts to reduce that risk. On the other hand, the consumption of industrial wastes in concrete production contributes to improving the environment. Industrial waste can be used as supplementary cementitious materials (SCMs) to enhance concrete properties. This paper reviews the effects of SCMs, such as silica fume, fly ash, metakaolin, and ground granulated blast furnace slag (GGBFS), on the properties of fresh and hardened concrete. The findings show that SCMs enhance packing density and reduce permeability. The impact of SCMs on concrete properties appears after a period of curing depending on the availability of calcium hydroxide and activity index. Calcium hydroxide produced from cement hydration reacts with silicates of SCMs to produce additional calcium-silicate hydrates that enhance concrete strength and minimize the relatively large size of calcium hydroxide, which lowers porosity. Silica fume and metakaolin raise water demands and reduce workability, while GGBFS and fly ash improve workability. Silica fume, metakaolin, and (10) μm particle size of GGBFS increase early-age strength, (10-45) μm particle size of GGBFS enhances strength after 28 days, while fly ash raises the strength after 90 days. For low cement content, 10 % or less silica fume, (10-30) % fly ash, (10-20) % GGBFS or metakaolin are considered the perfect percentage to arrive at best strength. For high cement content, (25-30) % silica fume or 40 % fly ash is considered the optimum ratio to reach the highest strength.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":" 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138614756","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

Experimental and Numerical Simulation of Thermal Storage Capsule in AC Duct System 交流风管系统中的蓄热胶囊的实验和数值模拟

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.485

Hussein Ali Al-Kutuby, M. Theeb

{"title":"Experimental and Numerical Simulation of Thermal Storage Capsule in AC Duct System","authors":"Hussein Ali Al-Kutuby, M. Theeb","doi":"10.31185/ejuow.vol11.iss3.485","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.485","url":null,"abstract":"This experimental and numerical study investigates the effect of porous media on the thermal storage behaviour of a refrigeration duct system. The study presents the transient behaviour of heat absorption and Nusselt number for different velocities and porous media presence/absence cases. Results show that the heat transfer rate decreases over time, with the presence of porous media, providing resistance to heat absorption, particularly at relatively low velocities. The Nusselt number decreases slightly over time, but it increases as the velocity increases in all cases, with the maximum value observed at a velocity of 3 m/s. The presence of porous media significantly enhances heat transfer, with an improvement of up to 150% at a lower velocity of 1.5 m/s and 110% at an inlet velocity of 2.25 m/s. The study provides a comprehensive visualisation of the heat transfer process through contour analysis of temperature distribution, allowing better understanding of the thermal storage system’s design and performance. The findings have implications for the optimisation of thermal storage systems in various applications, including energy-efficient buildings and renewable energy systems.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":" 73","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138612035","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

Experimental study of the split-type air conditioner with the variable-speed compressor, variable-speed supply fan, and electronic expansion valve 带有变速压缩机、变速送风机和电子膨胀阀的分体式空调的实验研究

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.458

Amani D. Salman, Alaa R. Al-Badri, Ahmed H. Al-Hassani

{"title":"Experimental study of the split-type air conditioner with the variable-speed compressor, variable-speed supply fan, and electronic expansion valve","authors":"Amani D. Salman, Alaa R. Al-Badri, Ahmed H. Al-Hassani","doi":"10.31185/ejuow.vol11.iss3.458","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.458","url":null,"abstract":"Buildings often use air conditioning systems to regulate the indoor thermal environment in terms of temperature and humidity. These parameters are hard to control within the desired limits by only using traditional constant-speed compressors and constant-speed supply fans. The constant-speed devices with on-off control methods consume a high rate of energy and provide unsatisfactory control, especially for indoor humidity. Therefore, variable speed compressor (VSC) technology was developed to overcome the problems of control and energy consumption. In this study tested a split-type air conditioning system with a capacity of 1 ton (12,000 BTU/hr, 3.5 KW) of refrigeration was tested using R410A as the working fluid under different operating conditions. The system consists of a VSC, an air-cooled condenser, an electronic expansion valve (EEV), and a direct expansion evaporator (DX) with a variable-speed fan. The effect of compressor speed, degree of superheating, EEV opening, and supply fan speed on system performance was considered. Through experiments, concluded several points. First of all, the highest superheat was 20 ℃ at constant compressor speed. On the other hand, the smallest superheat was 10 ℃ at constant compressor speed. The performance coefficient increases when the compressor speed decreases. The highest value of the COP is 4.71, which can be obtained at the compressor speed of 3000 rpm and DS is 20 ℃, while the lowest value of the COP is 1.74 at the compressor speed of 5000 rpm and DS is 10 ℃ because of the increasing the compressor speed leads to an increase in energy consumption and a decrease in the COP, increasing the closing of the expansion valve opening leads to an increase in DS because of a decrease in the flow rate of the refrigerant to the evaporator. Finally, refrigeration capacity and COP increase linearly with evaporator temperature and airflow velocity due to the heat exchange process.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":"10 s1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138621226","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

Comparative Study on A Novel Local Electroplating Method Using High-Density Paste Versus Traditional Electrolytic Solutions: An Examination of Copper Coating Thickness and Corrosion Resistance on Iron Samples 使用高密度浆料的新型局部电镀方法与传统电解溶液的比较研究：铁样品铜镀层厚度和耐腐蚀性检验

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.500

Firas Alhachami

引用次数: 0

Tuning of PID Controller for Speed Control of DC-Motor by using Generalized Regression Neural Network and Invasive Weed Optimization 利用广义回归神经网络和入侵杂草优化调整用于直流电机速度控制的 PID 控制器

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.451

Muhammad Hilal Mathboob, H. Alrikabi, Ibtisam A. Aljazaery

{"title":"Tuning of PID Controller for Speed Control of DC-Motor by using Generalized Regression Neural Network and Invasive Weed Optimization","authors":"Muhammad Hilal Mathboob, H. Alrikabi, Ibtisam A. Aljazaery","doi":"10.31185/ejuow.vol11.iss3.451","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.451","url":null,"abstract":"The Generalized Recurrent Neural Network (GRNN) and Invasive Weed Optimization (IWO) algorithms are two powerful techniques that can be used to optimize motor drive speed. GRNN is a type of artificial neural network designed to process time-series data, while IWO is a metaheuristic optimization technique inspired by the behavior of invasive weed species. To optimize motor drive speed using GRNN and IWO algorithms, data on motor performance over time must be collected and used to train a GRNN model that can predict future motor performance based on past performance. By optimizing the parameters of the GRNN model, the optimal combination of parameters can be found to maximize motor efficiency and performance while minimizing energy consumption and wear and tear on the motor. The objective of this study is to regulate the speed of a Per Magnetic DC (PMDC) motor with high precision and rapid response using a GRNN/IWO controller. The IWO-GRNN controller exhibits superior damping response and reduced overshoot in comparison to conventional GRNN controllers. Additionally, the drive current limiting mechanism ensures that the motor operates within its rated continuous current limit during continuous operation. The IWO-tuned single-loop GRNN controller outperforms the single-loop GRNN controller when tuned. The GRNN-IWO controller provides excellent damping response and minimal overshoot, enabling faster control response of the DC motor, with an accuracy of 98.85% compared to MATLAB-tuned IWO.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":"124 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138609078","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

Performance Evaluation Voice over WLAN Capacity in Three Standards IEEE 802.11 三种标准的无线局域网语音容量性能评估 IEEE 802.11

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.488

Sarah Ali Abdullah

引用次数: 0