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

Behavior of Reinforced Concrete Corbels Strengthened with CFRP Strips Subjected to Monotonic and Repeated Loading 使用 CFRP 带加固的钢筋混凝土檐板在单调和重复加载下的行为

Tikrit Journal of Engineering Sciences Pub Date : 2024-02-16 DOI: 10.25130/tjes.31.1.8

Enas S. Ibrahim, M. Abdulrahman, Yasser I. Yahia, Belal Alsubari, H. S. Abdulaali, Shagea Alqawzai

{"title":"Behavior of Reinforced Concrete Corbels Strengthened with CFRP Strips Subjected to Monotonic and Repeated Loading","authors":"Enas S. Ibrahim, M. Abdulrahman, Yasser I. Yahia, Belal Alsubari, H. S. Abdulaali, Shagea Alqawzai","doi":"10.25130/tjes.31.1.8","DOIUrl":"https://doi.org/10.25130/tjes.31.1.8","url":null,"abstract":"Concrete corbels are short cantilevers subjected to monotonic and repeated loads. Repeated loads generally negatively affect the concrete structural members' strength as they decrease the resistance to external loads. To increase these loads, strengthening with carbon fiber reinforced polymer (CFRP) strips as an externally bounded technique is used. This paper studies the behavior and strength of strengthened corbels subjected to monotonic and repeated (constant and incremental) loads. The experimental program included the casting and testing of twelve double-concrete corbels. All specimens have been kept constant for corbel dimensions and main and secondary reinforcement. Nine were strengthened with CFRP strips using different patterns, while the others were left un-strengthened as control corbels. The results showed that both repeated loads' types, i.e., constant and incremental, affected the ultimate load capacity of corbels. Compared to monotonic loading, a reduction occurred in ultimate load and ultimate deflection for corbels subjected to five repeated loading cycles. For corbels strengthened by externally bounded CFRP strips under any applied loads, the ultimate load significantly increased, while the ultimate deflection decreased compared to un-strengthened at the same applied load. All corbels failed by de-bonding the CFRP strips.","PeriodicalId":30589,"journal":{"name":"Tikrit Journal of Engineering Sciences","volume":"76 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140454721","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

Dam Breakdown and Response of Protection Dam, Case Scenarios of Mosul-Badush Dams, Northern Iraq 伊拉克北部摩苏尔-巴杜什水坝的溃坝和保护水坝的应对措施，案例场景

Tikrit Journal of Engineering Sciences Pub Date : 2024-02-15 DOI: 10.25130/tjes.31.1.7

Maha Shaher Badowi, S. Saleh, Mohammed Rashid Abbood

{"title":"Dam Breakdown and Response of Protection Dam, Case Scenarios of Mosul-Badush Dams, Northern Iraq","authors":"Maha Shaher Badowi, S. Saleh, Mohammed Rashid Abbood","doi":"10.25130/tjes.31.1.7","DOIUrl":"https://doi.org/10.25130/tjes.31.1.7","url":null,"abstract":"In this study, a program was built to simulate the sudden and complete collapse of the Mosul and Badush Dams behavior towards this collapse and predict the level at which the water will balance in the two dams after the collapse, compared to different levels at the Mosul Dam before the collapse. Two mathematical models were built as inputs to this program. The first predicted the water level in the Mosul Dam reservoir in terms of its storage volume before the collapse, and the second predicted the water level in the Badush reservoir after the collapse, according to the level in the Mosul reservoir before the collapse. For each collapse scenario, the program was organized according to sequential steps summarized assuming the water level in the Badush Dam reservoir when the level stabilizes, and from it determining the water volume in Badush reservoir based on the geometric analysis of the reservoir, then the volume of water transferred from Mosul reservoir to Badush reservoir, and thus the volume of water inside Mosul reservoir before the collapse. From the first mathematical model, the level of the Mosul Dam reservoir was determined before the collapse. The second mathematical model determined the level of the Badush Dam reservoir after the collapse. The results showed that the program has high flexibility in predicting what will happen in the Badush Dam reservoir after the collapse based on the water level in the Mosul Dam reservoir before it collapses and that the limits of the program's work extend from the minimum to the maximum level in Mosul Dam at which the failure can occur. Also, the storage volume in Mosul Dam will be distributed to the two reservoirs after the failure until the level stabilizes. Badush Dam, at a level of 330.4 m (a.s.l), can expand the maximum flood wave resulting from the total and sudden collapse of Mosul Dam at its maximum level of 333 m (a.s.l).","PeriodicalId":30589,"journal":{"name":"Tikrit Journal of Engineering Sciences","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140456510","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

Suppression of the Capacitor Voltage ripple in Modular Multilevel Converter for Variable-Speed Drive Applications 抑制变速驱动应用模块化多电平转换器中的电容器电压纹波

Tikrit Journal of Engineering Sciences Pub Date : 2024-02-13 DOI: 10.25130/tjes.31.1.6

Ahmed K. Hannan, Zainab A. Kadhum, Anmar K. Ali, Abdelrahman Farghly, Ibtisam K. Hanan

引用次数: 0

Suppression of the Capacitor Voltage ripple in Modular Multilevel Converter for Variable-Speed Drive Applications 抑制变速驱动应用模块化多电平转换器中的电容器电压纹波

Tikrit Journal of Engineering Sciences Pub Date : 2024-02-13 DOI: 10.25130/tjes.31.1.6

Ahmed K. Hannan, Zainab A. Kadhum, Anmar K. Ali, Abdelrahman Farghly, Ibtisam K. Hanan

引用次数: 0

Quantifying the Reliability of Volumetric and Areal Calculation with UAV-Generated DEMs: A Comparative Study with Ground Truth Data 利用无人机生成的 DEM 对体积和面积计算的可靠性进行量化：与地面实况数据的比较研究

Tikrit Journal of Engineering Sciences Pub Date : 2024-02-02 DOI: 10.25130/tjes.31.1.5

Ahmed J. Hussein, Sabbar A. Salih

引用次数: 0

Removal of Monovalent and Divalent Cations from Brine Water by Electrodialysis Using Modified Polyethersulfone Membranes 使用改性聚醚砜膜通过电渗析去除盐水中的一价和二价阳离子

Tikrit Journal of Engineering Sciences Pub Date : 2024-01-13 DOI: 10.25130/tjes.31.1.3

Z. A. Khalaf, Sarah S. Mohammed Jawad

{"title":"Removal of Monovalent and Divalent Cations from Brine Water by Electrodialysis Using Modified Polyethersulfone Membranes","authors":"Z. A. Khalaf, Sarah S. Mohammed Jawad","doi":"10.25130/tjes.31.1.3","DOIUrl":"https://doi.org/10.25130/tjes.31.1.3","url":null,"abstract":"In electrodialysis, an ion exchange membrane removes unwanted ions from wastewater and toxic metal ions from effluents. Montmorillonite-based modified \"polyethersulfone membranes\" have been studied as a potential small-scale electrodialysis approach for removing ions from wastewater. The study featured several steps, including solid polymerization, electrolyte balance, and removal of each component from the water. The study used three distinct “cation-exchange membranes (CEM)\" types. The selected water body was diluted 100 times before being added to the electrodialysis cell in amounts of the center, cathodic, and anodic chambers, each containing 55, 30, and 40 mL. The initial pH for the real solutions of the water body was 7.16 at 25°C. Compared to \"Sulfonated poly arylene ether sulfone (S-PESOS)\" (23.23%) and Nafion® (35.34%), \"hexamethylenediamine (HEXCl)\" stands out as the only cross-linked material with significantly high-water content. When the membrane water content is too high, the membrane may lose its mechanical strength and cannot provide enough ionic conductivity. The semi-empirical model's parameters were estimated to simulate the elimination of Na+, K+, Ca2+, and Mg2+ by three membranes. HEXCl and S-PESOS were electrodialyzed and used to treat the serial dilution from the water with cationics. The removal rate gradually rose after the electrodialysis started.","PeriodicalId":30589,"journal":{"name":"Tikrit Journal of Engineering Sciences","volume":"8 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140509460","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

Blind and Non-Blind Deconvolution-Based Image Deblurring Techniques for Blurred and Noisy Image 基于盲和非盲解卷积的模糊和噪声图像去模糊技术

Tikrit Journal of Engineering Sciences Pub Date : 2024-01-09 DOI: 10.25130/tjes.31.1.2

S. W. Nourildean

{"title":"Blind and Non-Blind Deconvolution-Based Image Deblurring Techniques for Blurred and Noisy Image","authors":"S. W. Nourildean","doi":"10.25130/tjes.31.1.2","DOIUrl":"https://doi.org/10.25130/tjes.31.1.2","url":null,"abstract":"Abstract: Image deblurring is a common issue in low-level computer vision aiming to restore a clear image from a blurred input image. Deep learning innovations have significantly advanced the solution to this issue, and numerous deblurring networks have been presented to recover high-quality images. This study aims to investigate the impact of Blind deconvolution and Non-Blind Deconvolution (Weiner Filter, Regularized Filter, and lucky Richardson) deblurring techniques and blind deconvolution to retrieve the original image from the blurring and the noisy images. Point Spread Function (PSF) is required to perform the deconvolution process. MATLAB program is utilized in this study as a suitable tool for image processing. Peak to Signal Ratio (PSNR) and structural index similarity (SSIM) are the major parameters used to examine image quality. The results showed that the Regularized Filter was an effective technique to deblur the blurry image, and it achieved the largest PSNR and best SSIM with the prior information about the PSF for different degrees of blurring angle. These four deblurring techniques were unsuccessful in restoring the original image from the image with Gaussian noise.","PeriodicalId":30589,"journal":{"name":"Tikrit Journal of Engineering Sciences","volume":" 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139628327","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

Dual Performance Optimization of 6-DOF Robotic Arm Trajectories in Biomedical Applications 生物医学应用中 6-DOF 机械臂轨迹的双重性能优化

Tikrit Journal of Engineering Sciences Pub Date : 2024-01-03 DOI: 10.25130/tjes.31.1.1

Kian Raheem Qasim, Yousif Al Mashhadany, E. T. Yassen

{"title":"Dual Performance Optimization of 6-DOF Robotic Arm Trajectories in Biomedical Applications","authors":"Kian Raheem Qasim, Yousif Al Mashhadany, E. T. Yassen","doi":"10.25130/tjes.31.1.1","DOIUrl":"https://doi.org/10.25130/tjes.31.1.1","url":null,"abstract":"For the first time, dual-performance perfection technologies were used to kinematically operate sophisticated robots. In this study, the trajectory development of a robot arm is optimized using a dual-performance perfection technique. The proposed approach alters the robot arm's Kinematics by creating virtual points even if the robotic system is not redundant to make it kinematically suitable for biomedical applications. In the suggested method, an appropriate objective function is chosen to raise one or maybe more performance measures while lowering one or more kinematic characteristics of a robot arm. The robot arm's end effector is set in place at the crucial locations, and the dual performance precision algorithm changes the joints and virtual points due to the robot arm's self-motion. As a result, the ideal values for the virtual points are established, and the robot arm's design is changed. Accordingly, this method's ability to visualize modifications made to the processor's design during the optimization problem is one of its benefits. The active robotic arm is used as a case study in this article. The task is defined as choosing the best path based on the input target's position and direction and is used in X-ray robot systems. The outcomes demonstrate the viability of the suggested approach and can serve as a useful prototype for an intelligent X-ray robot.","PeriodicalId":30589,"journal":{"name":"Tikrit Journal of Engineering Sciences","volume":"14 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139630666","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

An End-to-End Security Scheme for Protection from Cyber Attacks on Internet of Things (IoT) Environment 防止物联网（IoT）环境遭受网络攻击的端到端安全方案

Tikrit Journal of Engineering Sciences Pub Date : 2023-12-19 DOI: 10.25130/tjes.30.4.16

Ahamd Khader Habboush, Bassam Mohammed Elzaghmouri, B. K. Pattanayak, Saumendra Pattnaik, Rami Ahmad Habboush

引用次数: 0

New Algorithm for Real-Valued Fourier Transform 实值傅里叶变换新算法

Tikrit Journal of Engineering Sciences Pub Date : 2023-12-07 DOI: 10.25130/tjes.30.4.13

Sukaina K. Salih, M. Hamood

引用次数: 0