Mühendislik Fakültesi / Faculty of Engineering
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Comparison of Gross Calorific Value Estimation of Turkish Coals using Regression and Neural Networks Techniques
(Metso,Vale,Tata Steel,ESSAR STEEL,TATA CONSULTANCY SERVICE, 2012-09)Gross calorific value (GCV) of coals was estimated using artificial neural networks, linear and non- linear regression techniques. Proximate and ultimate analysis results were collected for 187 different coal samples. ... -
Eşdeğer Sirkülasyon Basıncının Yapay Zeka Yöntemleri ile Tespiti ve Performans Karşılaştırması
(Petrol Mühendisleri Odası, 2020-11-19)Sondaj operasyonlarında kuyu dibi basıncının hassas bir şekilde tespiti, operasyonların emniyeti ve operasyonlarla doğrudan ilişkili birtakım mühendislik tasarımları açısından kritik bir öneme sahiptir. Kuyu ... -
Integrated performance evaluation method study and performance based department ranking: a case study
(Springer, 2020-02)Enterprise companies, which make future strategic plan, need to view overall performance. In this direction, monitoring decision-making unit (DMU) performances is a critical issue. Therefore, it should be fair and consistent ... -
An integrated solution approach for multi-objective, multi-skill workforce scheduling and routing problems
(Elsevier Ltd., 2020-06)We study the multi-skill workforce scheduling and routing problem in field service operations. It is motivated by a real-life problem faced by electricity distribution companies on a daily basis. Given a set of technicians ... -
Limit Theorem for A Semi-Markovian Random Walk with General Interference of Chance
(Penerbit Universiti Kebangsaan Malaysia, 2020-04)Proses jalan rawak semi-Markovan dengan kemungkinan gangguan umum telah dibangunkan dan dikaji. Isi utama kajian ini adalah andaian bahawa kemungkinan gangguan diskrit mempunyai bentuk umum. Dalam beberapa keadaan, terbukti ... -
A novel replacement policy for a linear deteriorating system using stochastic process with dependent components
(Wiley, 2020-05)In this study, a mechanical system with linear deterioration and preventive maintenance is considered. The state of the system over time is represented by a semicontinuous stochastic process with dependent components. The ... -
Electricity market structure and forecasting market clearing prices
(Springer, 2020)Electricity markets are evolving into a complex competitive business environment with an increasing role of the private sector in production, consumption, and retailing of electricity. Even transmission and distribution ... -
Measuring the value of energy storage systems in a power network
(Elsevier Ltd., 2020-09)The increased use of renewable generators and their intermittent behavior motivates network operators to deploy energy storage systems. In this study, energy storage types, locations, and capacities are optimized for a ... -
Controlled drug release behavior of metformin hydrogen chloride from biodegradable films based on chitosan/poly(ethylene glycol) methyl ether blend
(ELSEVIER, 2020-01)In this study, novel smart drug release films were prepared by blending chitosan with polyethylene glycol methyl ether (PEGME), also named as methoxy polyethylene glycol (mPEG), for controlled drug release applications. ... -
Development of cost effective in-situ microfibrillar recycled PET/carbon fiber/polypropylene matrix composites with high mechanical properties
(American Institute of Physics Inc., 2020-01)Carbon fibers (CF) are excellent reinforcers for thermoplastic polymer composites owing to their high thermal and mechanical properties. However, their applications are mostly limited to high-end applications such as in ... -
CVD synthesis and characterization of thin Mo2C crystals
(WILEY, 2020-06)In this study, we present an investigation on the growth of thin Mo2C crystals via chemical vapor deposition using CH4. Optical microscopy (OM), scanning electron microscopy (SEM), atomic force microscopy(AFM), and Raman ... -
Wrinkling of graphene because of the thermal expansion mismatch between graphene and copper
(WILEY, 2018-05)Well-defined bundles of wrinkles are observed on the graphene-covered copper by using atomic force microscopy after chemical vapor deposition process. Their numerical analyses are performed by employing a set of formula ... -
The effects of acid pretreatment and surface stresses on the evolution of impurity clusters and graphene formation on Cu foil
(ELSEVIER SCIENCE BV, 2017-12)In this study, the effects of acid pretreatment together with the surface stresses are studied systematically to control the densities of Si and Ca based impurities on the surface and to understand their effects on the ... -
Indium Sulfide Based Photoelectrodes for All-Vanadium Photoelectrochemical Redox Flow Batteries
(American Chemical Society, 2020-03)The utilization of indium sulfide (In2S3) photo-electrodes in an all-vanadium photoelectrochemical redox flow battery system has been investigated. The In2S3-based photo-electrodes have been prepared via the ultrasonic ... -
Design of output feedback sliding mode controller for SEPIC converter for robustness
(Taylor and Francis Ltd., 2019-07)This paper presents an output feedback sliding mode control (SMC) of a SEPIC converter whose utilisation areas include MPPT and PFC in industrial applications. Owing to their discrete nature, DC-DC converters represent ... -
Design of extended Kalman filter for SEPIC converter and comparison to Kalman filter
(Springer, 2020-03)Single ended primary inductance converter (SEPIC) is a type of DC-DC converter whose industrial applications include maximum power point tracking and Active power factor correction. Owing to present nonlinear circuit ... -
DNN Transfer Learning From Diversified Micro-Doppler for Motion Classification
(Institute of Electrical and Electronics Engineers Inc., 2019-12)Recently, deep neural networks (DNNs) have been the subject of intense research for the classification of radio frequency signals, such as synthetic aperture radar imagery or micro-Doppler signatures. However, a fundamental ... -
Robustness of Clustered D2D Cache Placement Against Mobility
(Institute of Electrical and Electronics Engineers Inc., 2019-09)In this study we consider the problem of cache placement in a device-to-device (D2D) enabled cellular network with mobile users. D2D communication occurs between helper users and ordinary users, where helpers are able ... -
Precoder Design For Multi-Group Multicasting With a Common Message
(Institute of Electrical and Electronics Engineers Inc., 2019-10)This paper considers precoding for multi-group multicasting with a common message. The multiple antenna base station communicates with K clusters, each with L users. There is a common message destined to all users and a ... -
Social Internet of Digital Twins via Distributed Ledger Technologies: Application of Predictive Maintenance
(Institute of Electrical and Electronics Engineers Inc., 2019-11)Predictive Maintenance in the era of Internet-of-Things is envisioned to be an important functionality of consumer electronics along with many other application areas. Challenges for Predictive Maintenance within Interne ...
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