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Articles 71221 - 71250 of 196716

Full-Text Articles in Engineering

Pv-Based Off-Board Electric Vehicle Battery Charger Using Bidc, Ankita Paul, Krithiga Subramanian, Sujitha N Jan 2019

Pv-Based Off-Board Electric Vehicle Battery Charger Using Bidc, Ankita Paul, Krithiga Subramanian, Sujitha N

Turkish Journal of Electrical Engineering and Computer Sciences

In recent years, the use of renewable energy sources is increasing drastically in several sectors, which leads to its role in the automobile industry to charge electric vehicle (EV) batteries. In this paper, a photovoltaic (PV) array-fed off-board battery charging system using a bidirectional interleaved DC-DC converter (BIDC) is proposed for light-weight EVs. This off-board charging system is capable of operating in dual mode, thereby supplying power to the EV battery from the PV array in standstill conditions and driving the DC load by the EV battery during running conditions. This dual mode operation is accomplished by the use of …

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A Control Scheme For Maximizing The Delivered Power To The Load In A Standalonewind Energy Conversion System, Saeed Heshmatian, Davood A. Khaburi, Mahyar Khosravi, Ahad Kazemi Jan 2019

A Control Scheme For Maximizing The Delivered Power To The Load In A Standalonewind Energy Conversion System, Saeed Heshmatian, Davood A. Khaburi, Mahyar Khosravi, Ahad Kazemi

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, a control scheme is proposed for maximum power point tracking (MPPT) in a variable speed standalone wind energy conversion system (WECS) with permanent magnet synchronous generator. A MPPT algorithm is designed trying to eliminate the main deficiency of the conventional perturbation and observation (P&O) method, which is the challenge of choosing a proper step size and the unwanted trade-off between accuracy and speed. The designed algorithm properly addresses this drawback and significantly improves the MPPT performance. Another important issue is to ensure fast and accurate tracking of the optimal reference point obtained from the MPPT algorithm and …

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Community Detection In Complex Networks Using A New Agglomerative Approach, Majid Arasteh, Somayeh Alizadeh Jan 2019

Community Detection In Complex Networks Using A New Agglomerative Approach, Majid Arasteh, Somayeh Alizadeh

Turkish Journal of Electrical Engineering and Computer Sciences

Complex networks are used for the representation of complex systems such as social networks. Graph analysis comprises various tools such as community detection algorithms to uncover hidden data. Community detection aims to detect similar subgroups of networks that have tight interconnections with each other while, there is a sparse connection among different subgroups. In this paper, a greedy and agglomerative approach is proposed to detect communities. The proposed method is fast and often detects high-quality communities. The suggested method has several steps. In the first step, each node is assigned to a separated community. In the second step, a vertex …

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Speech Emotion Recognition Using Semi-Nmf Feature Optimization, Surekha Reddy Bandela, T Kishore Kumar Jan 2019

Speech Emotion Recognition Using Semi-Nmf Feature Optimization, Surekha Reddy Bandela, T Kishore Kumar

Turkish Journal of Electrical Engineering and Computer Sciences

In recent times, much research is progressing forward in the field of speech emotion recognition (SER). Many SER systems have been developed by combining different speech features to improve their performances. As a result, the complexity of the classifier increases to train this huge feature set. Additionally, some of the features could be irrelevant in emotion detection and this leads to a decrease in the emotion recognition accuracy. To overcome this drawback, feature optimization can be performed on the feature sets to obtain the most desirable emotional feature set before classifying the features. In this paper, semi-nonnegative matrix factorization (semi-NMF) …

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Scale-Invariant Mfccs For Speech/Speaker Recognition, Zekeri̇ya Tüfekci̇, Gökay Di̇şken Jan 2019

Scale-Invariant Mfccs For Speech/Speaker Recognition, Zekeri̇ya Tüfekci̇, Gökay Di̇şken

Turkish Journal of Electrical Engineering and Computer Sciences

The feature extraction process is a fundamental part of speech processing. Mel frequency cepstral coefficients (MFCCs) are the most commonly used feature types in the speech/speaker recognition literature. However, the MFCC framework may face numerical issues or dynamic range problems, which decreases their performance. A practical solution to these problems is adding a constant to filter-bank magnitudes before log compression, thus violating the scale-invariant property. In this work, a magnitude normalization and a multiplication constant are introduced to make the MFCCs scale-invariant and to avoid dynamic range expansion of nonspeech frames. Speaker verification experiments are conducted to show the effectiveness …

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A Novel Randomized Recurrent Artificial Neural Network Approach: Recurrent Random Vector Functional Link Network, Ömer Faruk Ertuğrul Jan 2019

A Novel Randomized Recurrent Artificial Neural Network Approach: Recurrent Random Vector Functional Link Network, Ömer Faruk Ertuğrul

Turkish Journal of Electrical Engineering and Computer Sciences

The random vector functional link (RVFL) has successfully been employed in many applications since 1989. RVFL has a single hidden layer feedforward structure that also has direct links between the input layer and the output layer. Although nonlinearity, high generalization capacity, and fast training ability can be provided in RVFL, it can be found from the literature that higher nonlinearity can be obtained by adding recurrent feedback to an artificial neural network. In this paper, the recurrent type of RVFL (R-RVFL), which has both outer feedbacks and also inner feedbacks, is proposed. In order to evaluate and validate the proposed …

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A Fine-Grain And Scalable Set-Based Cache Partitioning Through Thread Classification, İsa Ahmet Güney, Gürhan Küçük Jan 2019

A Fine-Grain And Scalable Set-Based Cache Partitioning Through Thread Classification, İsa Ahmet Güney, Gürhan Küçük

Turkish Journal of Electrical Engineering and Computer Sciences

As contemporary processors utilize more and more cores, cache partitioning algorithms tend to preserve cache associativity with a finer-grain of control to achieve higher throughput and fairness goals. In this study, we propose a scalable set-based cache partitioning mechanism, which welds an allocation policy and an enforcement scheme together. We also propose a set-based classifier to better allocate partitions to more deserving threads, a fast set redirection logic to map accesses to dedicated cache sets, and a double access mechanism to overcome the performance penalty due to a repartitioning phase. We compare our work to the best line-grain cache partitioning …

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A Twelve-Wavelength Thulium-Doped Fibre Laser Based On A Microfibre Coil Resonator Incorporating Black Phosphorus, Shi Li, Yu Yin, Elfed Lewis, Gerald Farrell, Pengfei Wang Jan 2019

A Twelve-Wavelength Thulium-Doped Fibre Laser Based On A Microfibre Coil Resonator Incorporating Black Phosphorus, Shi Li, Yu Yin, Elfed Lewis, Gerald Farrell, Pengfei Wang

Articles

A novel multi-wavelength continuous Thulium-doped fibre laser incorporating a microfibre coil resonator based on black phosphorus (MCR-BP) material has been successfully fabricated and demonstrated. A twelve-wavelength spectrum with 0.54 nm channel spacing has been achieved by simply adjusting the pump source power. A single peak extinction ratio of more than 40 dB was observed. The superior performance of the MCR-BP described in this article compared to conventional MCR based fibre lasers can be attributed the inclusion of the Black Phosphorous Material. The enhanced lasing is primarily due to the twin properties of the MCR-BP device combining a comb-like filter effect …

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Mode Transition In Conventional Step-Index Optical Fibers, Xiaokang Lian, Gerald Farrell, Qiang Wu, Wei Han, Fangfang Wei, Yuliya Semenova Jan 2019

Mode Transition In Conventional Step-Index Optical Fibers, Xiaokang Lian, Gerald Farrell, Qiang Wu, Wei Han, Fangfang Wei, Yuliya Semenova

Conference Papers

The discrete self-imaging effect reveals the distinct properties of cladding modes with core modes in step-index optical fibers, as was shown in our previous work [1], where only the linearly polarized LP0n modes were studied. In this paper, the dispersion diagram of the first 17 vector modes (TE0n, TM0n, HEmn and EHmn) and the related first 9 LPmn modes are calculated by both the full-vector finite element method and the graphical method with a three-layer step-index optical fiber model. The cladding modes distributions and the transitions between the core and cladding modes are analyzed. The results of this work are …

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The Autodrive Challenge: Autonomous Vehicles Education And Training Issues, Diane Peters, Jennifer Bastiaan, Juan R. Pimentel, Mehrdad Zadeh Jan 2019

The Autodrive Challenge: Autonomous Vehicles Education And Training Issues, Diane Peters, Jennifer Bastiaan, Juan R. Pimentel, Mehrdad Zadeh

Mechanical Engineering Presentations And Conference Materials

Automotive companies are focusing significant research and development efforts on autonomous vehicles. As they do so, they recognize the need for a large, well-trained workforce that is equipped to conduct these research and development projects, particularly in light of the projected shortages of STEM professionals in the United States. Some of these companies have found various ways to engage with professional societies and with universities to encourage the development of this workforce, and to promote themselves to STEM students while they are still in school. One such effort is the SAE / GM AutoDrive ChallengeTM, a new collegiate competition organized …

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How Faculty Advisers And Counselors View Their Role In The Swe Organization, Diane Peters, Alexa Rihana Abdallah Jan 2019

How Faculty Advisers And Counselors View Their Role In The Swe Organization, Diane Peters, Alexa Rihana Abdallah

Mechanical Engineering Presentations And Conference Materials

Faculty advisors and counselors play an important role in establishing and sustaining a successful Society of Women Engineers (SWE) student section. Currently, most SWE collegiate sections have both faculty advisors and counselors. A faculty advisor, who is required for student organizations in most universities, serves as the liaison between the SWE section and the university and is responsible for knowing the university’s policies. A faculty advisor helps the student section access university resources and ensures the section is meeting all university requirements. A counselor is required by SWE for a collegiate section to remain in “good standing” and serves as …

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What Is A Bim Design Model?, James Peters, Malachy Mathews Jan 2019

What Is A Bim Design Model?, James Peters, Malachy Mathews

Conference papers

The recent report into Building Information Management or BIM, by construction law experts May Winfield and Sarah Rock entitled “Winfield Rock Report” [1] gives reason to state that the UK architectural, engineering and construction industry or AEC, is hindered by the absence of a clear definition of Level 2 BIM. The ISO 19650-2 standard published in 2019, is based upon PAS1192-2:2013. The intent of ISO 19650-2 is to provide a road map to facilitate the standardisation of BIM process in a uniformed fashion. A key pillar of ISO 19650 is the “information cycle” and central to this is a federated …

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Assessing The Grit And Mindset Of Incoming Engineering Students With An Emphasis On Gender, Ines Direito, Shannon Chance, Emanuela Tilley, John Mitchell Jan 2019

Assessing The Grit And Mindset Of Incoming Engineering Students With An Emphasis On Gender, Ines Direito, Shannon Chance, Emanuela Tilley, John Mitchell

Conference papers

Engineering programs can be very demanding, particularly in the first years where students encounter new forms of highly challenging coursework. To better prepare and support students, educators must acknowledge non-academic factors, such as the role of self-beliefs and personal attributes. Education research suggests that students are more likely to give up and disengage from their studies when they lack grit or assume a fixed mindset. Previous studies suggest that female students are generally grittier but less confident when compared to male students. This paper presents the initial work of an ongoing study to explore self-confidence and motivations to study engineering …

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A Demographic Picture Of Academics Teaching On Engineering Programmes In Ireland And Their Approaches To Teaching (Ati)., Una Beagon, Brian Bowe Jan 2019

A Demographic Picture Of Academics Teaching On Engineering Programmes In Ireland And Their Approaches To Teaching (Ati)., Una Beagon, Brian Bowe

Conference papers

This paper presents the results of an online survey (n=293) carried out on academics teaching on engineering programmes in Ireland in 2017/18. The primary purpose of the survey was to provide a selection pool for interviewees in a separate phenomenographic study, however the survey also provided some interesting findings. Previously, there has been little published data on the diversity of personnel teaching on engineering programmes in Ireland and this paper aims to provide an insight. In addition to collating the demographics of the survey respondents, and their background experiences in academic and industry, the Approaches to Teaching Inventory (ATI) [1] …

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Engineering Skills Requirements: A Systematic Literature Review (2009-2016), Una Beagon, Brian Bowe Jan 2019

Engineering Skills Requirements: A Systematic Literature Review (2009-2016), Una Beagon, Brian Bowe

Conference papers

No abstract provided.

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Graduate Engineering Skills A Literature Review & Call For Rigorous Methodological Approaches, Una Beagon, Darren Carthy, Brian Bowe Jan 2019

Graduate Engineering Skills A Literature Review & Call For Rigorous Methodological Approaches, Una Beagon, Darren Carthy, Brian Bowe

Conference papers

What sort of working world do our engineering graduates face? Engineering has become a global profession, where professional skills are as important as the intellectual prowess gained by obtaining the qualification itself. First, we must consider what skills are needed for engineers to meet the challenges of Industry 4.0. Academics who wish to engage in activities to enhance engineering education might therefore initially seek to identify which skills are most important and there is a wealth of literature addressing different viewpoints which adds further complexity to evaluating such studies. This paper reports on two independent systematic reviews of literature to …

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Daylight: What Makes A Difference, M. Knoop, O. Stefani, B. Bueno, B. Matusiak, R. Hobday, A. Wirz-Justice, K. Martiny, T. Kantermann, M. Aarts, N. Zemmouri, S. Appelt, Brian Norton Jan 2019

Daylight: What Makes A Difference, M. Knoop, O. Stefani, B. Bueno, B. Matusiak, R. Hobday, A. Wirz-Justice, K. Martiny, T. Kantermann, M. Aarts, N. Zemmouri, S. Appelt, Brian Norton

Articles

Light is necessary for vision; it enables us to sense and perceive our surroundings and in many direct and indirect ways, via eye and skin, affects our physiological and psychological health. The use of light in built environments has comfort, behavioural, economic and environmental consequences. Daylight has many particular benefits including excellent visual performance, permitting good eyesight, effective entrainment of the circadian system as well as a number of acute non-image forming effects and the important role of vitamin D production. Some human responses to daylight seem to be well defined whilst others require more research to be adequately understood. …

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Optimization Of Pv Powered Spd Switchable Glazing To Minimise Probability Of Loss Of Power Supply, Aritra Ghosh, Brian Norton Jan 2019

Optimization Of Pv Powered Spd Switchable Glazing To Minimise Probability Of Loss Of Power Supply, Aritra Ghosh, Brian Norton

Articles

Suspended particle device (SPD) glazing is an electrically actuated switchable glazing. It requires alternate current (AC) power supply to switch from opaque to transparent state. To power this glazing using PV device requires inverter. Optimization of AC powered switchable SPD glazing using photovoltaic (PV) device has been evaluated using loss of power supply probability (LPSP). Electrically switchable direct current (DC) powered electrochromic glazing was also considered in this investigation as it doesn't need any inverter to couple with PV. It is concluded that behaviour of these glazings is the dominant factor in performance optimization outweighting than azimuthal orientation and inclination …

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The Study Of Grit In Engineering Education Research: A Systematic Literature Review, Shannon Chance, Inês Direito, Manish Malik Jan 2019

The Study Of Grit In Engineering Education Research: A Systematic Literature Review, Shannon Chance, Inês Direito, Manish Malik

Articles

Researchontheroleofgrit–definedasbothperseveranceandpassionfor long-termgoals–onhumanperformancehasbeenconductedforthepast decade. It has been suggested that this non-cognitive factor is a better predictor of students’ retention than traditional academic measures. These findings hold relevance for engineering education research but studies on this area are still scarce. This paper provides a systematic review of the current state of research on grit and its correlates in engineering higher education research. Publications were identified using three types of databases specific to engineering education; a final set of 31 relevant records was analysed by type of population, methods, research topics and main results. Most of the reviewed studies implemented quantitative methodologies to …

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Adapting The Surveying Curriculum To New Dimensions Of The Profession, Fahria Masum, Reinfried Mansberger, Audrey Martin, Gerhard Navratil, Anthony Mushinge Jan 2019

Adapting The Surveying Curriculum To New Dimensions Of The Profession, Fahria Masum, Reinfried Mansberger, Audrey Martin, Gerhard Navratil, Anthony Mushinge

Articles

Today the surveying profession is very different from what it was twenty years ago. Recent technological innovations, globalization, and global land-related challenges have allowed a wide range of advances in the surveying profession. The vision is to promote surveying practices that can enhance the quality of services in a variety of tracks in the land profession. According to the new adjacent professional areas and the needs of the labor market, academic courses for surveyors have to be adapted to meet the broader scope of the surveying profession and to supply highly qualified land professionals. This paper outlines the new challenges …

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Mechanisms To Improve Employer Engagement In Apprenticeship In The Irish Construction Industry: A Mesolevel Analysis, Eoghan Ó Murchadha, Roisin Murphy Jan 2019

Mechanisms To Improve Employer Engagement In Apprenticeship In The Irish Construction Industry: A Mesolevel Analysis, Eoghan Ó Murchadha, Roisin Murphy

Conference papers

Apprentice training in Ireland remains within a state of flux. Although construction output is steady at present with the sector recording growth in excess of 60 percent over the last three years, there remains an alarming discordant issue of a lack of construction skills. In 2017, the largest representative body of construction related firms in Ireland, the Construction Industry Federation (CIF) endorsed a research study of their membership of more than 1,000 firms in an attempt to quantify the level of engagement in training. This study sought to identify the determinants of engagement and the constraints thereof. Findings from the …

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High-Efficiency Design Of A Grid-Connected Pv Inverter Based On Interleaved Flyback Converter Topology, Bünyami̇n Tamyürek, Bi̇lgehan Kirimer Jan 2019

High-Efficiency Design Of A Grid-Connected Pv Inverter Based On Interleaved Flyback Converter Topology, Bünyami̇n Tamyürek, Bi̇lgehan Kirimer

Turkish Journal of Electrical Engineering and Computer Sciences

The importance of efficiency in photovoltaic (PV) inverter applications makes the topology selection as the critical first step. Due to the low efficiency concern, flyback converter is not the preferred topology in kilowatt range in spite of its galvanic isolation, low cost, and small size advantages. Therefore, the objective of this research is to change the perception in favor of flyback converter by designing a flyback-topology-based PV inverter at 2.5 kW with high efficiency. The enhancement in efficiency is achieved mainly by using silicon carbide switching devices, designing ultrahigh-efficiency flyback transformers with extremely low leakage inductance and by implementing a …

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Mobility And Traffic-Aware Resource Scheduling For Downlink Transmissions In Lte-A Systems, Önem Yildiz, Radosveta İvanova Sokullu Jan 2019

Mobility And Traffic-Aware Resource Scheduling For Downlink Transmissions In Lte-A Systems, Önem Yildiz, Radosveta İvanova Sokullu

Turkish Journal of Electrical Engineering and Computer Sciences

As new cellular networks support not only voice services but also many multimedia applications, the requirements for reliable data transmission at high speeds create heavy load on the system. Even though LTE/LTE-A technology takes action towards alleviating this load, it is still necessary to manage resources effectively because of the inadequacy of the available radio resources. Thus, the scheduler at the MAC layer of the base station plays a very important role in resource allocation to the user. In this study a novel algorithm for resource allocation in mobile environments is presented, with two variations addressing different input traffic. The …

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A Beaconing-Based Roadside Services Discovery Protocol For Vehicular Ad Hoc Networks, Kifayat Ullah, Ali Sayyed, Muhammad Aziz, Edson Moreira Jan 2019

A Beaconing-Based Roadside Services Discovery Protocol For Vehicular Ad Hoc Networks, Kifayat Ullah, Ali Sayyed, Muhammad Aziz, Edson Moreira

Turkish Journal of Electrical Engineering and Computer Sciences

Recently, research on vehicular ad hoc networks (VANETs) has gained momentum all over the world. These emerging networks promise to make our driving experience more efficient, safer, comfortable, and enjoyable. VANETs have the potential to support a wide range of interesting applications. One such promising application area is the discovery of roadside services on the highways. Drivers need an efficient way to find these services during their journeys. However, due to the unique features of VANETs, the design and implementation of such applications is a challenging task. In this paper, we propose an application layer beaconing-based roadside services discovery protocol …

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Energy And Economic Assessment Of Major Free Cooling Retrofits For Data Centers In Turkey, Ozan Gözcü, Hamza Sali̇h Erden Jan 2019

Energy And Economic Assessment Of Major Free Cooling Retrofits For Data Centers In Turkey, Ozan Gözcü, Hamza Sali̇h Erden

Turkish Journal of Electrical Engineering and Computer Sciences

Mechanical cooling is responsible for a significant fraction of the energy consumption of data centers (DCs). Free cooling systems take advantage of ambient conditions to reduce the need for compressor-based cooling. This study utilizes thermodynamic models of major free cooling systems such as the direct air-side economizer (ASE), indirect air-side economizer (IASE), indirect evaporative cooler (IEC), and indirect water-side economizer (WSE) integrated with the existing cooling infrastructure of a typical 1 MW IT load DC. Proposed models utilize hourly weather data of various cities in Turkey to compute annual energy consumption and cost-saving potentials of each free cooling method with …

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An Adaptive Scheduling Scheme For Inhomogeneously Distributed Wireless Ad Hocnetworks, Adnan Fazil, Aamir Hasan, Muhammad Atique Ur Rehman, Ijaz Mansoor Qureshi Jan 2019

An Adaptive Scheduling Scheme For Inhomogeneously Distributed Wireless Ad Hocnetworks, Adnan Fazil, Aamir Hasan, Muhammad Atique Ur Rehman, Ijaz Mansoor Qureshi

Turkish Journal of Electrical Engineering and Computer Sciences

An efficient scheduling strategy guarantees the simultaneous transmission and successful reception by the scheduled nodes even inside a congested wireless ad hoc network. Owing to the dispersed nature of ad hoc networks, the node packing algorithm needs to be implementable without having network-wide channel state information and should additionally be able to pack the optimum number of successful transmissions. The proposed algorithm, for a network with nonhomogeneously distributed nodes, makes the decision to either inhibit or permit an active interferer around an active receiver based on the interferer?s transmission power. The analysis evidenced that the suggested scheme provides an estimated …

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Qpsk-Dual Carrier Modulation For Ultra-Wideband Communication In Body Areanetwork Channels, Yasi̇n Karan, Sali̇m Kahveci̇ Jan 2019

Qpsk-Dual Carrier Modulation For Ultra-Wideband Communication In Body Areanetwork Channels, Yasi̇n Karan, Sali̇m Kahveci̇

Turkish Journal of Electrical Engineering and Computer Sciences

Dual carrier modulation (DCM) using orthogonal frequency-division multiplexing (OFDM) improves the performance in multipath fading channels. In the literature DCM is proposed with 16-quadrature amplitude modulation (16QAM) for ultra-wideband (UWB) communication, with four bits per symbol to keep reliable high date transmission over longer distances. Body area network (BAN) standards address transmission reliability more than data rate. UWB is one of the physical layers proposed in BAN standards. In this study, DCM is used with quadrature phase shift keying (QPSK) instead of 16QAM to have better performance in reliable transmission. The performance of QPSK-DCM is analyzed and compared with 16QAM-DCM, …

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A Modified Langevin-Debye Model For Investigating The Electro-Optic Behaviour Of De Vries Smectic Liquid Crystals, Vigneshwaran Swaminathan, Vitaly Petrovich Panov, Sithara Pavithran Sreenilayam, Yuri Panarin, J. K. Vij Jan 2019

A Modified Langevin-Debye Model For Investigating The Electro-Optic Behaviour Of De Vries Smectic Liquid Crystals, Vigneshwaran Swaminathan, Vitaly Petrovich Panov, Sithara Pavithran Sreenilayam, Yuri Panarin, J. K. Vij

Articles

An external electric field applied across a planar-aligned cell in Smectic A* phase of de Vries smectic liquid crystal induces director redistribution over a cone, resulting in a substantial increase in the birefringence and the apparent optical tilt angle. Such an electro-optic response is modelled by Shen et al. [Y. Shen et al., Phys. Rev. E 88, 062504 (2013)], who modified their previous hollow cone with a diffuse cone model by introducing the molecular distribution function limited over a range of tilt angles, that lie in between θmin and θmax. The limits in these two tilt …

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Optimized Modeling Of Ni-Mh Batteries Primarily Based On Taguchi Approach And Evaluation Of Used Ni-Mh Batteries, Hani Muhsen, Ahmad Al-Muhtady Jan 2019

Optimized Modeling Of Ni-Mh Batteries Primarily Based On Taguchi Approach And Evaluation Of Used Ni-Mh Batteries, Hani Muhsen, Ahmad Al-Muhtady

Turkish Journal of Electrical Engineering and Computer Sciences

This paper aims to generate an optimized model of the Ni-MH battery based on the Taguchi method and it further aims to evaluate used Ni-MH batteries that served in hybrid electric vehicles and electric vehicles. The status of twelve used Ni-MH batteries is studied to determine their usefulness after their life cycle in automotive applications. The status of used batteries is evaluated by investigating their state of charge, remaining useful life, and degradation in performance. Accordingly, the tested batteries are classified into four categories and they are proposed to serve in different applications. The novelty of the work lies in …

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Determination Of Distance Between Dc Traction Power Centers In A 1500-V Dc Subway Line With Artificial Intelligence Methods, Mehmet Taci̇ddi̇n Akçay, İlhan Kocaarslan Jan 2019

Determination Of Distance Between Dc Traction Power Centers In A 1500-V Dc Subway Line With Artificial Intelligence Methods, Mehmet Taci̇ddi̇n Akçay, İlhan Kocaarslan

Turkish Journal of Electrical Engineering and Computer Sciences

The electrification system in rail systems is designed with regard to the operating data and design parameters. While the electrification system is formed, the minimum voltage rating that the traction force requires during the operation needs to be provided. The highest value of the voltage drop occurring on the line is determined by the distance between power centers. This value needs to be kept within certain limits for the continuity of operation. In this study, the determination of the distance between DC traction power centers for a 1500-V DC-fed rail system is done by means of the adaptive neuro-fuzzy inference …

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