Fouling is the accumulation of undesired particles on heat transfer surfaces which affects the heat transfer performance of a heat exchanger negatively. The accumulation of these particles prevents heat from being transformed through the heat exchangers by generating a fouling layer-like insulation. The main aim of the thesis is to investigate the machine learning algorithms to classify and predict the fouling status of PHE used in combi-boilers, to generate the background of the predictive maintenance, besides investigating the fouling effect on PHEs in terms of heat transfer and energy consu ...Daha fazlası
At the core of our growing societies, energy supply stands as one of the major concerns today, and it will be an inevitable challenge for our near future. As the nations are looking to find solutions for the transition from fossil fuels – depleting at a high rate – to alternative energy sources, solar energy through PV cells is getting attention as an affordable and easily implemented option especially for power supply in commercial and residential buildings.
3D realistic models are used in many fields such as engineering, archaeology, and city planning. The most effective technique used to create these models is the photogrammetry technique. The hardware and software features of the unmanned aerial vehicles to be used to implement this technique are of great importance. Many different unmanned aerial vehicles can be used for photogrammetric studies in the surveying and mapping industry, and therefore users have difficulties choosing needed unmanned aerial vehicles for their studies. In this study, 3D modelling performance and usage areas of popula ...Daha fazlası
Additive Manufacturing (AM) is a manufacturing method that pushes the limits of imagination and eliminates the question of whether complex industrial products can be produced that cannot be obtained with traditional manufacturing methods. In this study, microstructure and mechanical properties of maraging steels produced by DMLS method and aged in different durations (6 and 9 hours) and atmospheres (Air, N2 and N2/H2) were investigated. When the SEM images were examined, it was ob-served that the molten pool boundaries did not disappear completely but became blur-red with increasing temperatur ...Daha fazlası
Teknolojinin ve teorik bilginin gelişmesiyle son 20 yıldır günlük hayatımızın her
alanında olduğu gibi sağlık alanında da yapay zekâ (YZ)'nın uygulanması giderek
artmaktadır. Özellikle koronavirüs (COVID-19) ve iskemik inme gibi toplum sağlığını
tehdit eden hastalıkların YZ ile tespit edilmesi sağlık çalışanların iş yüklerini
hafifleterek daha doğru tanı sağlamaktadır. Bu hastalıkların tespit edilmesinin yanında
medikal görüntü üzerinden hastalık bölgelerinin bölütlenmesi, sağlık çalışanlarına
tedavide yardımcı olabilecek bilgi sağlamaktadır. Bununla birlikte medikal görüntü
üzerinden b ...Daha fazlası
Public institutions need movable and immovable property, resource and altitude rights
in order to perform their duties and services imposed on them by the constitution and
laws. It is possible for public institutions to obtain these needs by renting or purchasing
them by making a contract like all other real and legal legal persons. However, if the
person who owns the properties or rights required by the Public Institutions does not
want to make a contract, or if the price cannot be agreed upon, it will lead to the
disruption or non-fulfillment of the duties and services required to be f ...Daha fazlası
Excessive use of global energy sources causes negative environmental impacts and a reduction in the available energy resources. Therefore, energy efficiency is the main scope of engineering studies. Since household refrigeration accounts for a large portion of the energy consumption rate in buildings, several innovative techniques have been developed to improve the energy efficiency of vapor compression refrigeration systems. Suction line heat exchangers are considered one of these techniques and they are used to avoid the presence of liquid at the compressor and to prevent sweating on the suc ...Daha fazlası
The design of a compound mobile serial robot controlled remotely by a C# program utilizing the MQTT (Message Queuing Telemetry Transport) protocol is the main topic of this thesis. The robot is powered by a Raspberry Pi. The advantages of mobility and serial manipulators are combined in the compound mobile serial robot, allowing it to carry out difficult tasks in a variety of settings. As the main computer, the Raspberry Pi gives the robot and its control application connectivity and processing capability. Data interchange and command execution are made possible by the integration of the MQTT ...Daha fazlası
Citizen Design Science is the new co-design strategy for urban systems through active
design tools with the help of citizens' observation, experience, and local knowledge,
which improves the planning, design, management, and regeneration of cities, urban
living spaces, public spaces, and buildings. The approach combines the opportunity of
crowdsourcing ideas, concerns, and knowledge by citizens on urban spaces.
Urban planning and design need to be human-centered by understanding citizens’
experiences, concerns, and wishes for urban spaces. In the resilient city target, it is
important t ...Daha fazlası
The way a droplet behaves when it lands on a surface depends on the characteristics of the surface and the flow conditions of the droplet. It can deposit, rebound, splash, etc. There is delimited research on how surface roughness and chemical composition affect the deformation of droplets upon impact, in comparison to the studies done on smooth surfaces. Our model uses two-phase flow to simulate the axisymmetric motion of droplets over surfaces with heterogeneities by combining the Navier-Stokes equations for motion with the Cahn-Hilliard equation for tracking the phase-field. We integrate the ...Daha fazlası
Son yıllarda, spiking sinir ağlar (SNN'ler), gerçek nöronların faaliyetini taklit edebilme yetenekleri nedeniyle popülerlik kazanmış ve geniş bir makine öğrenimi uygulama yelpazesine uygun hale gelmiştir. Bu çalışmada, farklı potansiyel güncelleme kurallarının SNN'lerin COVID-19 sınıflandırması için performansına olan etkisini araştırıyoruz. COVID-19 pandemisi, sağlık sistemine eşi benzeri görülmemiş zorluklar getirmiş olup, hastalığın yayılmasını kontrol etmek için erken teşhis önemlidir. CT tarama görüntüleme, hastalıkla ilişkili akciğer anormalliklerini gösteren yüksek çözünürlüklü görüntül ...Daha fazlası
Bu çalışmada, farklı zeminler ve geomembranlar (GM) arasındaki arayüzleri
etkileyen mühendislik parametreleri, kür sıvısı, kür süresi ve normal gerilme sınıfı
gibi çeşitli koşullar altında incelenmiştir. Ayrıca depolama sahaları gibi birden çok
geosentetiğin (GS) bir arada kullanıldığı tasarımlarda, GS’ler arasında oluşan
arayüzeylerde de potansiyel kayma yüzeyleri oluşabilir. Bu nedenle, bu çalışmada
aynı zamanda GM ve geotekstiller arasındaki arayüzeyler de araştırılmıştır. İlk
aşamada, GS’lerin ve zeminlerin mühendislik parametreleri laboratuvar deneyleri ile
belirlenmiştir. İkinci a ...Daha fazlası
6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.