Al-Nahrain Journal for Engineering Sciences最新文献_第5页

Piezoelectric Fixing Direction effect on GRF test results in Wearable Shoe-Insole System 压电固定方向对可穿戴鞋垫系统GRF测试结果的影响

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-12-23 DOI: 10.29194/njes.25040152

Ammar I. Kubba

引用次数: 0

Evaluating the Potentials of the Housing Fund Law to Support Housing Finance Policies in Iraq 评价《住房公积金法》支持伊拉克住房金融政策的潜力

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-12-23 DOI: 10.29194/njes.2504a027

Arshad Alanizi, Muna Alsayed, Alyaa Mahmood

引用次数: 0

Simulation of The Application of an Adaptive Smart Envelope to an Existing Building in Rhinoceros Grasshopper 自适应智能围护结构在既有建筑中的应用仿真

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-11-20 DOI: 10.29194/njes.2503a012

Lina Qassim Al Rawi, Khalid Abdul Wahhab

{"title":"Simulation of The Application of an Adaptive Smart Envelope to an Existing Building in Rhinoceros Grasshopper","authors":"Lina Qassim Al Rawi, Khalid Abdul Wahhab","doi":"10.29194/njes.2503a012","DOIUrl":"https://doi.org/10.29194/njes.2503a012","url":null,"abstract":"In recent decades, many factors have emerged in the building design field, as the technology development after the industrial revolution has left many environmental problems affecting building environments and turning them into unhealthy ones. Also, the issues of consuming natural resources required innovative and modern solutions to address, which needed the guidance and focus of researchers, engineers, and many other relevant disciplines to find the best treatments to solve them. One of the essential treatments was using advanced smart technology to solve the environmental problems of buildings, such as providing thermal comfort and reducing energy consumption.\u0000The concept of adaptive smart envelopes is one of this manifestation of advanced technology in the field of building design characterized by interaction and adaptation to the surrounding environment through the application of many technologies which it works to improve its environmental efficiency. The research aim was to simulate the changes in the building environment, which is treated by covering the building with an adaptive smart envelope by using the Rhinoceros Grasshopper programme.","PeriodicalId":7470,"journal":{"name":"Al-Nahrain Journal for Engineering Sciences","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90823758","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 Analysis of Air Inlet Height Variation in a Solar Tower system Using Plate and Metal Foam Absorber 金属泡沫板太阳能塔系统进气高度变化的实验分析

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-11-20 DOI: 10.29194/njes.25030120

Sarmad A. Abdul Hussein, Mohammed A. Nima

{"title":"Experimental Analysis of Air Inlet Height Variation in a Solar Tower system Using Plate and Metal Foam Absorber","authors":"Sarmad A. Abdul Hussein, Mohammed A. Nima","doi":"10.29194/njes.25030120","DOIUrl":"https://doi.org/10.29194/njes.25030120","url":null,"abstract":"The experimental analysis is conducted under the Iraqi climate conditions to investigate the performance enhancement of a solar updraft tower system (SUTS) using the porous copper foam as an absorber plate and conventional absorber plate with absorber inclination angle of 18°. In the present work, a semicircular collector is divided into two identical quarter thermal collectors to become two identical SUTS. One of the quarter circular thermal collectors contains on the metal foam as an absorber plate, while the other quarter collector on the conventional flat copper absorber plate. In this study the air inlet height is changed of (3, 5, and 8) cm. The experimental tests carried out in Baghdad city (latitude 33.3° N). Results showed that the air inlet height variation caused to enhance the solar updraft tower performance. The highest values was recorded when the air inlet height is 3 cm using porous absorber compared to flat absorber plate. Copper material foam as an endothermic surface causes a marked decrease in average surface temperature of the plate. The maximum hourly thermal efficiency of solar collector was increased to about 41.6 % and the maximum enhancement of the power output to about 45.2 % compared with flat absorber plate.","PeriodicalId":7470,"journal":{"name":"Al-Nahrain Journal for Engineering Sciences","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82082186","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

Dynamic Modeling of Three Links Robot Manipulator (Open Chain) with Spherical Wrist 球面腕部三连杆机器人(开链)的动力学建模

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-11-20 DOI: 10.29194/njes.25030114

Salim A. Kako

引用次数: 0

Improvement of Overlap for 2x2 MZI Electro-Optic Switch Based on Lithium Tantalite (LiTaO3) 基于钽酸锂(LiTaO3)改善2x2 MZI电光开关重叠

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-07-19 DOI: 10.29194/njes.25020091

Sadeq Adnan Hbeeb

引用次数: 0

Three Dimensional Fuzzy Reliability for System Performance Evaluation 系统性能评价的三维模糊可靠性

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-07-19 DOI: 10.29194/njes.25020081

Kadhum A. Abed

{"title":"Three Dimensional Fuzzy Reliability for System Performance Evaluation","authors":"Kadhum A. Abed","doi":"10.29194/njes.25020081","DOIUrl":"https://doi.org/10.29194/njes.25020081","url":null,"abstract":"The research proposed a developed methodology for evaluation the system performance in uncertainty associated with traditional modelling methodology is focused on either load L or resistance R variability, but not both. A two-dimensional (2D) fuzzy set (traditional model), represent with the one dimension for universe of discourse (in x-direction) and the second dimension of his membership degree (in y-direction), is not full sufficient to handle both, load and resistance variation of system performance. The theoretical principle basis of this research is based on development of the three dimensional (3D) of fuzzy set that includes system performance variability in load and resistance from two dimensional. The proposed methodology (traditional model) extends the acceptance level of partial performance of system concept to a 3D-dimantion representation. This representation allows to capturing the changing of preferences of decision makers in load and resistance. The major objective of the research is to proposed the original methodology for evaluate system performance and management that is capable of; (a) addressing uncertainty caused by load and resistance variability and ambiguity; (b) integrating objective and subjective evaluation; and (c) assisting system performance management decision making based on a more detailed certainty evaluation of load and resistance variability.\u0000The study proposed two models for fuzzy reliability performance indexes: first traditional model included (I) 2D fuzzy reliability-vulnerability Rv index, (II) 2D fuzzy robustness Ro index; the second developed model (i) 3D fuzzy reliability-vulnerability Rv index, (ii) 3D fuzzy robustness Ro index; and comparing between them. These indexes have the capability of evaluating the operational performance of complex systems. Proposed methodology is illustrated by using the Al-Wathba Water Supply System (WWSS) as a case study.","PeriodicalId":7470,"journal":{"name":"Al-Nahrain Journal for Engineering Sciences","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90901203","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

Effect of Styrene Butadiene Styrene on Properties of Open-Graded Asphalt Concrete Mixtures 丁二烯苯乙烯对开级配沥青混凝土混合料性能的影响

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-07-19 DOI: 10.29194/njes.25020067

Mohammed M. Namaa, Zaynab I. Qasim, Karim H. Ibrahim AlHelo

{"title":"Effect of Styrene Butadiene Styrene on Properties of Open-Graded Asphalt Concrete Mixtures","authors":"Mohammed M. Namaa, Zaynab I. Qasim, Karim H. Ibrahim AlHelo","doi":"10.29194/njes.25020067","DOIUrl":"https://doi.org/10.29194/njes.25020067","url":null,"abstract":"Open graded asphalt mixture is becoming more widespread where it is applied for various purposes, e.g. drainage of rainwater effectivity, traffic safety (high skid resistance), and controlling pollution noise. However, it has many other disadvantages, of which low stability, high stripping, and moisture sensitivity. The research aims to study the effect of styrene butadiene styrene SBS addition on the volumetric and mechanical properties of open graded mixture. In this research one type of aggregate with gradation (12.5 mm NMAS), asphalt of penetration grade (40/50), and cement as filler were used. Optimum asphalt content was selected based on the criteria of air voids content, asphalt drain down, permeability, and abrasion resistance (for aged and un-aged) samples. Other properties of open-graded mixtures, such as indirect tensile strength (ITS), moisture susceptibility, Marshall stability and flow were evaluated. The results show that addition of polymer (SBS) leads to an enhancement in the properties of the modified mixtures. There is an improvement in Marshall parameters. Also, a slight decreasing is noticed for permeability and air voids. For Cantabro abrasion loss (aging and un-aging condition), the abrasion resistance is increased, the drain down of asphalt is decreased from original mixture by addition of SBS. Finally, the moisture sensitivity is improved indicating that modified mixes becomes more resistant to water damage.","PeriodicalId":7470,"journal":{"name":"Al-Nahrain Journal for Engineering Sciences","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75801017","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

Springback Analysis in Bending of V-Section Using Deformable Die v型钢变形模弯曲回弹分析

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-07-19 DOI: 10.29194/njes.25020096

Jalil Shukur, Waqass Khudhir, M. Abbood

引用次数: 0

Non-Dispersive Near Infrared Gas Flow Cell Design for Oxygenator-Exhaust Capnometry 非色散近红外气体流动池设计用于氧合器排气二氧化碳计量

Al-Nahrain Journal for Engineering Sciences Pub Date : 2022-07-19 DOI: 10.29194/njes.25020076

B. A. Faihan, Z. Al-Dahan, Hussein H. Alzubeidy

{"title":"Non-Dispersive Near Infrared Gas Flow Cell Design for Oxygenator-Exhaust Capnometry","authors":"B. A. Faihan, Z. Al-Dahan, Hussein H. Alzubeidy","doi":"10.29194/njes.25020076","DOIUrl":"https://doi.org/10.29194/njes.25020076","url":null,"abstract":"Non-dispersive near-infrared technique is widely used nowadays for the detection of gases, especially in harsh environments. In this study, an optical gas cell was designed for oxygenator exhaust capnometry. A computer-based simulation was used for the analysis of air flows for model selection. ANSYS Discovery 2020 R2 was used for model simulation. The gas flow cells were tested using a custom-made gas rig to measure the fraction absorbance of carbon dioxide gas at the detector. Two gases were used, nitrogen gas as a reference gas (0%) and 9% carbon dioxide. Three gas cells with the following optical path lengths were tested: 31mm, 36mm, and 40mm. The results showed that all gas flow cells produced laminar flow and small pressure drop across the inlet and outlet of the cell (11~12 Pa). Further, the minimum velocity is obtained in the 40mm gas flow sensor and it is located at the gas outlet path away from the effective optical gas path. The simulation and experimental results indicate that the gas flow cell of 40mm optical path length is more suitable for the intended application as it offers a maximum effective absorption path compared to the stagnation areas, and as a result, it provides the maximum fraction absorbance.","PeriodicalId":7470,"journal":{"name":"Al-Nahrain Journal for Engineering Sciences","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90238879","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