gazi university journal of science最新文献_第10页

Indoor Lighting Conversion Approach for Sustainable Energy Efficiency Applications in Campus Buildings: Hitit University Engineering Faculty Study 可持续能源效率在校园建筑中应用的室内照明转换方法:hit大学工程学院研究

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gazi university journal of science Pub Date : 2022-08-26 DOI: 10.35378/gujs.1002669

S. S. Seyitoglu, Ömer Faruk Tozlu, Emir Avcioglu

{"title":"Indoor Lighting Conversion Approach for Sustainable Energy Efficiency Applications in Campus Buildings: Hitit University Engineering Faculty Study","authors":"S. S. Seyitoglu, Ömer Faruk Tozlu, Emir Avcioglu","doi":"10.35378/gujs.1002669","DOIUrl":"https://doi.org/10.35378/gujs.1002669","url":null,"abstract":"Global energy crises, limited energy resources and damage to nature in energy production have pushed humanity to use energy more efficiently and renewable energy sources. In this context, the importance of implementing energy efficiency and sustainable strategies in buildings which consumes high energy, has increased. In this study, the effect of luminaires substition with more efficient ones and electricity production by renewable energy sources on efficiency, sustainability and environment was examined on a sample education building.The calculations were made according to standards and equipment supplier data. As a result of this study, it has been found that the use of high-efficiency LED lighting instead of halogen or fluorescence luminaires in the engineering faculty building and laboratory of Hitit University, will reduce the electricity consumption by 68.2%. In addition, it has been deduced that the solar energy system to be installed on the faculty’s roof, will significantly reduce CO2 emission, and has a payback period of 5.5 years. In terms of gas emissions, a roof-mounted solar energy system is 21, 45, and 32 times less hazardous to the environment than natural gas, lignite, and fuel oil, respectively.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43138927","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

New Ostrowski Type Inequalities for Trigonometrically Convex Functions Via Classical Integrals 基于经典积分的三角凸函数的新Ostrowski型不等式

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gazi university journal of science Pub Date : 2022-08-23 DOI: 10.35378/gujs.934699

Şenol Demir, S. Maden

引用次数: 0

Integral Fuzzy Sliding Mode Controller for Hydraulic System Using Neural Network Modelling 基于神经网络建模的液压系统积分模糊滑模控制器

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gazi university journal of science Pub Date : 2022-08-23 DOI: 10.35378/gujs.979370

A. Ak, Erdal Yilmaz, Sevan Katrancioglu

引用次数: 0

Effect of Wall Colors and Usage Rates on The Perception of Interior Spaces 墙壁颜色和使用率对室内空间感知的影响

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gazi university journal of science Pub Date : 2022-08-21 DOI: 10.35378/gujs.1120440

Kübra AKSOY ÖZLER, M. L. Hidayetoğlu, Kemal Yıldırım

{"title":"Effect of Wall Colors and Usage Rates on The Perception of Interior Spaces","authors":"Kübra AKSOY ÖZLER, M. L. Hidayetoğlu, Kemal Yıldırım","doi":"10.35378/gujs.1120440","DOIUrl":"https://doi.org/10.35378/gujs.1120440","url":null,"abstract":"In this study, it was aimed to determine the effects of color hues and usage rates in interior spaces on the spatial perceptions of users. With this objective, a living space was designed in a manner that would have three different color hues (warm, neutral, and cool) and usage rates at 10%, 50%, and 100% and digital visuals were prepared. A total of 233 subjects participated in the research questionnaire and the data obtained was analyzed. In conclusion, it was determined that the living spaces which were colored at a low rate were perceived more positively according to the Semantic Differentiation Scales compared to the completely colored spaces. The spaces where warm and cool colors were used at the rate of 10% were perceived as more spacious and beautiful compared to the spaces where colors were used at the rates of 50% and 100%, whereas it was observed that when the values received were from positive to negative, they were listed in the form of 10% > 50% > 100%. Despite this, it was determined that the spaces where warm colors were used at the rates of 50% and 100% were perceived as more informal. Furthermore, it was observed that the differences in the color hues used on the walls and the usage rates were changing according to genders and professions. Accordingly, it was determined that especially females and interior architects preferred even more the spaces with warm colors having a low usage rate.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46299596","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

Rotor Field Oriented Control of Doubly Fed Induction Generator in Wind Energy Conversion System 风能转换系统中双馈感应发电机转子磁场定向控制

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gazi university journal of science Pub Date : 2022-08-17 DOI: 10.35378/gujs.987303

Z. Omac, İrfan Erdem

{"title":"Rotor Field Oriented Control of Doubly Fed Induction Generator in Wind Energy Conversion System","authors":"Z. Omac, İrfan Erdem","doi":"10.35378/gujs.987303","DOIUrl":"https://doi.org/10.35378/gujs.987303","url":null,"abstract":"In this study, robust and high-performance vector control of a rotor side converter (RSC) is performed for the stability and efficient operation doubly fed induction generator (DFIG) based on the variable speed wind turbine (VSWT). The mathematical model of the DFIG is simulated by using Matlab/Simulink. The amplitude and frequency of the voltage in the DFIG is controlled for different values of load and variable speeds. In the experimental study, a DFIG-based wind turbine system is set up in the laboratory. The field position of stator is detected from stator voltages by a phase locked loop (PLL) circuit. The rotor position is measured with an incremental encoder connected to the rotor shaft of the DFIG. The angular position of slip is calculated by the difference between the rotor and the stator field positions. The frequency and amplitude of rotor currents are determined with the angular position of slip. The space vector pulse width modulation (SVPWM) technique is used to generate the output voltages of the converter that feeds the rotor windings. In the experimental study, the rotor side converter is controlled with the DS1103 board. The prepared experiment set is tested at different operating speeds.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48154292","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

Geometric Patterns Used in the Architecture of Kaboud Mosque in Tabriz, Iran 几何图案在伊朗大不里士卡布德清真寺建筑中的应用

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gazi university journal of science Pub Date : 2022-08-13 DOI: 10.35378/gujs.1055129

Mahya Ghouchani, Faeze Gholizade, Hooman Sobouti

{"title":"Geometric Patterns Used in the Architecture of Kaboud Mosque in Tabriz, Iran","authors":"Mahya Ghouchani, Faeze Gholizade, Hooman Sobouti","doi":"10.35378/gujs.1055129","DOIUrl":"https://doi.org/10.35378/gujs.1055129","url":null,"abstract":"Doubts about the architectural style of the Kaboud Mosque in Tabriz are related to the geometry of the plan and its special volumetric composition, which has made this building different from other examples of mosque architecture in Iran. For this reason, some scholars, following the formal origins of this mosque, have traced its roots in the art of the Ottoman region and, as a result, have introduced the architecture of the Kaboud Mosque as an imitation of Ottoman architecture. In the present study, it is assumed that the architecture of the Kaboud Mosque, despite having some similarities in the form of mosques in Ottoman, has been built according to the principles of Iranian architecture. Using a descriptive-analytical method, it seeks to answer the question of what are the geometric principles used in the architecture of Kaboud Mosque in Tabriz. The results show that the construction of the Kaboud Mosque is similar in form to some Ottoman architectural works. However, structurally, it has been created entirely based on the Iranian engineering style. The architectural style of this building, although it opened a new chapter in the design of the mosque in Iranian architecture, but could not arouse the desire of later architects to repeat its form.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45381192","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

A Comparative Study on Denoising from Facial Images using Convolutional Autoencoder 基于卷积自编码器的人脸图像去噪比较研究

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gazi university journal of science Pub Date : 2022-08-11 DOI: 10.35378/gujs.1051655

M. Darici, Z. Erdem

{"title":"A Comparative Study on Denoising from Facial Images using Convolutional Autoencoder","authors":"M. Darici, Z. Erdem","doi":"10.35378/gujs.1051655","DOIUrl":"https://doi.org/10.35378/gujs.1051655","url":null,"abstract":"Denoising is one of the most important preprocesses in image processing. Noises in images can prevent extracting some important information stored in images. Therefore, before some implementations such as image classification, segmentation, etc., image denoising is a necessity to obtain good results. The purpose of this study is to compare the deep learning techniques and traditional techniques on denoising facial images considering two different types of noise (Gaussian and Salt&Pepper). Gaussian, Median, and Mean filters have been specified as traditional methods. For deep learning methods, deep convolutional denoising autoencoders (CDAE) structured on three different optimizers have been proposed. Both accuracy metrics and computational times have been considered to evaluate the denoising performance of proposed autoencoders, and traditional methods. The utilized standard evaluation metrics are the peak signal to noise ratio (PSNR) and structural similarity index measure (SSIM). It has been observed that overall, while the traditional methods gave results in shorter times in terms of computation times, the autoencoders performed better concerning the evaluation metrics. The CDAE based on the Adam optimizer has been shown the best results in terms of PSNR and SSIM metrics on removing both types of noise","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46108572","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: 2

Design and Implementation of MRAC & MRAC-PID feedback for Turntable 转台MRAC及MRAC- pid反馈的设计与实现

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gazi university journal of science Pub Date : 2022-08-04 DOI: 10.35378/gujs.1052850

Saibal Manna, D. Singh, Ashok Kumar Aella

{"title":"Design and Implementation of MRAC & MRAC-PID feedback for Turntable","authors":"Saibal Manna, D. Singh, Ashok Kumar Aella","doi":"10.35378/gujs.1052850","DOIUrl":"https://doi.org/10.35378/gujs.1052850","url":null,"abstract":"The paper explains a control method for turntable by feedback a PID controller with the traditional model reference adaptive controller (MRAC) based on MIT rule. The traditional MRAC is designed for first-order system with adjustment of two-variable parameter. However, the majority of plants, including turntable, are second order system. Traditional MRAC tracking performance for second order system is unsatisfactory. Control law for second order system along with extension from first to second order of MRAC is derived. The modified MRAC i.e., MRAC-PID controller is designed for the application of turntable. It enhanced the system’s dynamic performance. To assess the performance of the proposed controller, MATLAB/Simulink software was used. The article incorporates detailed analysis and comparison of MRAC as well as MRAC-PID controller based on MIT rule for the second order system. Several adaptive gains were chosen during simulation for verify the robustness of proposed controller. It is observed that MRAC would definitely be track the reference model but modified MRAC has better performance. Several performance indexes such as integral absolute error (IAE), integral time absolute error (ITAE) and integral square error (ISE) were employed to justify the proposed controller superiority.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48469592","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: 2

LUMBAR SPINAL STENOSIS ANALYSIS WITH DEEP LEARNING BASED DECISION SUPPORT SYSTEMS 基于深度学习决策支持系统的腰椎管狭窄分析

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gazi university journal of science Pub Date : 2022-08-04 DOI: 10.35378/gujs.1116423

Sinan Altun, A. Alkan

引用次数: 1

The Study of Interaction Activity of Nickel (ll) Phthalocyanine Complex Bearing Tetra Substituted Phenoxy-3-Methoxybenzoic Acid Groups with DNA 含四取代苯氧基-3-甲氧基苯甲酸的酞菁镍配合物与DNA相互作用活性的研究

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gazi university journal of science Pub Date : 2022-08-02 DOI: 10.35378/gujs.1089316

A. Arslantaş, M. Ağırtaş

引用次数: 0