Kufa Journal of Engineering最新文献_第4页

CORROSION BEHAVIOR AND BIO-WETTABILITY OF THERMALLY OXIDIZED TITANIUM ALLOY SURFACE FOR BIOMEDICAL APPLICATIONS 生物医学用热氧化钛合金表面的腐蚀行为和生物润湿性

Kufa Journal of Engineering Pub Date : 2023-07-29 DOI: 10.30572/2018/kje/140305

M. Mohammed

引用次数: 0

AN APPROACH FOR SINGLE-TONE FREQUENCY ESTIMATION USING DFT INTERPOLATION WITH PARZEN WINDOWING 基于parzen窗的DFT插值单音频率估计方法

Kufa Journal of Engineering Pub Date : 2023-07-29 DOI: 10.30572/2018/kje/140307

Mohammed A. T. Alrubei, Pozdnyakov Alexander Dmitrievich

{"title":"AN APPROACH FOR SINGLE-TONE FREQUENCY ESTIMATION USING DFT INTERPOLATION WITH PARZEN WINDOWING","authors":"Mohammed A. T. Alrubei, Pozdnyakov Alexander Dmitrievich","doi":"10.30572/2018/kje/140307","DOIUrl":"https://doi.org/10.30572/2018/kje/140307","url":null,"abstract":"In many applications, including radar, radio and television, medical, industrial, and others, frequency estimate of a periodic sinusoidal signal is a crucial step in the signal processing process. Due to its simplicity of usage in digital systems, the interpolation-based signal frequency estimation algorithm is now frequently employed. Because of its performance speed, interpolation methods in the analysis rely on the fast Fourier transform (FFT). This paper proposes an approach for single-tone frequency estimate utilizing DFT interpolation with Parzen windowing in order to increase the accuracy of frequency estimation. In addition, compared to Li and Dian algorithm, the proposed method has a lower computing complexity and more steady performance. To minimize undesirable effects brought on by spectrum leakage from the FFT procedure, suitable windows have been investigated. To investigate the viability of the suggested method, three windows Flattop, Parzen, and Bohman, were applied to the simulation signal. When compared to the other windows, the Parzen window with the proposed algorithm outperformed them with a maximum frequency estimation error of 0.00003 compared to 0.0001 and 0.0002 for the Dian and Li algorithms, respectively, when the Sample Size was 8192.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124810054","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

RESISTANCE SPOT WELDING OF DISSIMILAR METALS AISI 1006 LOW CARBON STEEL AND AA6061 ALUMINUM ALLOY USING ZINC AND TIN COATING 异种金属aisi 1006低碳钢和aa6061铝合金的电阻点焊采用锌和锡涂层

Kufa Journal of Engineering Pub Date : 2023-07-29 DOI: 10.30572/2018/kje/140301

Ammar Yasir Akkar, M. Alali

引用次数: 0

EFFECT OF ADDING OF SYNTHETIC BENTONITE CLAY ON MECHANICAL AND PHYSICAL PROPERTIES OF RUTBA IRAQI LOCAL MOULDING SANDS 合成膨润土的加入对伊拉克土坯型砂力学和物理性能的影响

Kufa Journal of Engineering Pub Date : 2023-07-29 DOI: 10.30572/2018/kje/140302

G. I. Hassan, Younis K. Khdir

引用次数: 0

DISORDER STRATEGY ACCORDING TO THE ENTRANCES OF THE NEW DEMOCRACY IN NAJAF ARCHITECTURE AFTER 2003 从2003年后纳杰夫建筑新民主主义的入口看无序策略

Kufa Journal of Engineering Pub Date : 2023-04-29 DOI: 10.30572/2018/kje/140204

Mariam Ali Alhakeem, Hamzah S. Al-Mamoori

{"title":"DISORDER STRATEGY ACCORDING TO THE ENTRANCES OF THE NEW DEMOCRACY IN NAJAF ARCHITECTURE AFTER 2003","authors":"Mariam Ali Alhakeem, Hamzah S. Al-Mamoori","doi":"10.30572/2018/kje/140204","DOIUrl":"https://doi.org/10.30572/2018/kje/140204","url":null,"abstract":"The events leave a lot of repercussions on city's architecture as a representation of the stations of ideological change reflected in what is happening to society in economic, political, scientific and social changes. After 2003 events in An-Najaf Al-Ashraf city had a great impact on its architecture resulted by the effect of continuous transformations during the past period in all the levels, as well as the progress, technological development and sudden openness to the west world. Therefore, the lack of contemporary knowledge of the strategies role that used for reconstruction in the emergence of architectural production during the past two decades in its current form, the research problem came as follows (the lack of knowledge of the strategy of disorder within the entrances to new democracy and the loss of local capabilities to observe its impact on architecture in the city of Najaf after 2003). The purpose of this study (investigating the effect of the strategy of chaos associated with the events following 2003 on architectural output in An Najaf city, and proposing a method of achieving local identity continuity in the city and its communication with residents). The conclusions of the study were appropriate for proposing a strategy for the reconstruction of the city and the continuation of its construction through the use of the field survey method. This was accomplished by distributing a questionnaire to a sample of architects in the city of Najaf, as they are familiar with the movement of architecture in the city. The concept of the study of disorganization strategy had a definitive conceptualization of its impact on the architecture of the holy city of Najaf, along with a proposal of the blue-green infrastructure strategy as a suitable strategy for the reconstruction of the city.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121367044","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 OF THE REVERSE OSMOSIS PILOT PLANT: USING SODIUM CHLORIDE AND MAGNESIUM CHLORIDE 反渗透中试装置的性能评价:采用氯化钠和氯化镁

Kufa Journal of Engineering Pub Date : 2023-04-29 DOI: 10.30572/2018/kje/140201

M. A. Salih, Asmaa H. Dhiaa

{"title":"PERFORMANCE EVALUATION OF THE REVERSE OSMOSIS PILOT PLANT: USING SODIUM CHLORIDE AND MAGNESIUM CHLORIDE","authors":"M. A. Salih, Asmaa H. Dhiaa","doi":"10.30572/2018/kje/140201","DOIUrl":"https://doi.org/10.30572/2018/kje/140201","url":null,"abstract":"The conversion of saltwater and brackish water into fresh water through desalination has gained significant importance as a solution to the worldwide scarcity of fresh water resources. The Reverse Osmosis (RO) method has been effectively utilized to generate fresh water from sources of brackish water. This research aims to examine the variables that affect the performance of the reverse osmosis process. The effectiveness of the membrane was assessed through experiments that explored the impact of varying operating conditions, such as feed pressure, temperature, and concentration, on the reverse osmosis pilot plant and salt solution system (consisting of NaCl and MgCl2). The selected membrane used a polymeric membrane constructed as FilmTec TW30-1812-50 spiral-wound module. The results showed that as the feed temperature and salt concentration increased, the salt rejection decreased. On the other hand, as the transmembrane pressure was raised, the membrane's salt rejection improved. The experiments revealed that the feed temperature and salt concentration have a significant impact on the membrane's performance. Among the various variables studied, operating pressure had the largest effect on the product rate. As operating pressure increased, the permeation flux and salt rejection also increased, with a salt rejection rate of 96% achieved at 5 bars. In addition to other factors, the concentration of the feed greatly influences the solute content in the final product.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121356109","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

APPLICATION OF INTEGRATED TAGUCHI METHOD AND PRESENT-WORTH METHOD TO OPTIMIZE THE TURNING PARAMETERS OF INCONEL X750 ALLOY WITH AL2O3 NANOFLUID IN COCONUT OIL 应用田口法和现值法对椰油中al2o3纳米流体对inconel x750合金车削工艺参数进行优化

Kufa Journal of Engineering Pub Date : 2023-04-29 DOI: 10.30572/2018/kje/140206

Ebun Fasina, B. Sawyerr, W. Adedeji, K. Adedeji, Ridwan Majekodunmi Adegoke, S. Oke, E. Oyetunji

{"title":"APPLICATION OF INTEGRATED TAGUCHI METHOD AND PRESENT-WORTH METHOD TO OPTIMIZE THE TURNING PARAMETERS OF INCONEL X750 ALLOY WITH AL2O3 NANOFLUID IN COCONUT OIL","authors":"Ebun Fasina, B. Sawyerr, W. Adedeji, K. Adedeji, Ridwan Majekodunmi Adegoke, S. Oke, E. Oyetunji","doi":"10.30572/2018/kje/140206","DOIUrl":"https://doi.org/10.30572/2018/kje/140206","url":null,"abstract":"A previous study has shown the successful application of the Taguchi method in both the direct and indirect perspectives to compute the optimal parameters during the turning of Inconel x-750 alloy. The study deployed signal-to-noise ratios to minimize the output of surface roughness, tool wear and cutting force but the machining economic parameters were not mentioned. Yet, the techno-economic dimension of machining aids profitable adjustments of the turning operations. To correct this deficiency, the present article introduces a techno-economic dimension to the turning process using literature data. This paper is about combining three variants of the Taguchi methods in five distinct formulations. The Taguchi, Taguchi-Pareto and Taguchi-ABC methods are combined with the present worth method by introducing the interest rate and inflationary rate at different points in the S/N ratio (SNR) calculations. Aspect ratios and direct parameter combinations replace the traditional direct parameter analysis in the factor-level framework. The present worth, optimal parametric setting and performance flow analysis are needed for all five formulations to ascertain the direction of performance analysis for the turning process. Concerning the direct and aspect ratios, the cutting velocity (PWV, 949.1444) and the feed rate-cutting velocity ratio (PWF/V, 0.026) are the first and last positions, respectively. Regarding the Taguchi experimental run, the present worth of the feed rate-cutting velocity ratio (PWF/V, -155.403) was the first position while the present worth of the cutting velocity (PWV, -185.009) is the last position. Results for other formulations show promising attributes for the methods. The work could be useful for planning purposes in turning operations.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127582329","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

INNOVATIVE USE OF SHAPE MEMORY ALLOYS AS REINFORCEMENTS FOR CONCRETE BEAM-COLUMN JOINTS: AN OVERVIEW 形状记忆合金作为混凝土梁柱连接处的钢筋的创新使用:概述

Kufa Journal of Engineering Pub Date : 2023-04-29 DOI: 10.30572/2018/kje/140203

M. Sabbaghian, M. Kabir

引用次数: 0

EVALUATION THE BEHAVIOR OF PULLOUT FORCE AND DISPLACEMENT FOR A SINGLE PILE: EXPERIMENTAL VALIDATION WITH PLAXIS 3D 单桩拉拔力和位移特性评估:plaxis 3d的试验验证

Kufa Journal of Engineering Pub Date : 2023-04-29 DOI: 10.30572/2018/kje/140207

Shaymaa Alsamia, E. Koch

引用次数: 0

SYNTHESIS AND CHARACTERISATION OF ABRASIVE MATERIALS PRODUCED FROM SNAIL SHELLS AND SILICA 以螺壳和二氧化硅为原料制备磨料的合成与表征

Kufa Journal of Engineering Pub Date : 2023-04-29 DOI: 10.30572/2018/kje/140205

E. Obidiegwu, H. Mgbemere, Oluwatosin T. Akande

{"title":"SYNTHESIS AND CHARACTERISATION OF ABRASIVE MATERIALS PRODUCED FROM SNAIL SHELLS AND SILICA","authors":"E. Obidiegwu, H. Mgbemere, Oluwatosin T. Akande","doi":"10.30572/2018/kje/140205","DOIUrl":"https://doi.org/10.30572/2018/kje/140205","url":null,"abstract":"Surface finishing operation is a very vital aspect of the manufacturing process and would not fully be achieved without abrasives such as emery paper. Some materials used in the production of abrasives like alumina (Al2O3), and Boron Carbide (B4C) are expensive thereby limiting their usage. This work is aimed at producing abrasive materials from snail shells, silica (SiO2), and epoxy resin while melamine formaldehyde acts as a hardener. The raw materials used were sieved according to ASTM E11-20 standard to obtain an average particle size of 400 µm. The composites were produced by varying different amounts of the epoxy resin as well as the other materials. The samples were analysed using physical, mechanical, and microstructural characterization techniques. An analysis of the results showed that as the content of the epoxy resin in the composite increased, the hardness values increased. The wear rate of the samples containing snail shell powders are higher than those containing only silica. The morphology of the samples obtained through microstructural tests revealed that the silica-based abrasive has better interfacial bonding which helped to confer strength. Therefore, silica can be used to produce abrasives with the required mechanical properties comparable to those of conventional abrasives.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116964957","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