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2017 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) & 2017 Intl Aegean Conference on Electrical Machines and Power Electronics (ACEMP)
Modern gaming technologies, like Unreal or Unity 3D, offer excellent opportunities to create visually rich virtual environments, but do not provide matching three-dimensional sound that is consistent with the physical properties of the virtual scenes they model. Virtual environments endowed with physically realistic 3D sound would be excellent research and training tools for simulating industrial...
The development process of creating 3D models such as characters, objects and landscapes is very time-consuming. This paper explores some new alternative methodologies (algorithms, software, techniques) to shorten this development time. This has relevance to more generic applications in 3D virtual environments, particularly through the use of 3D target models and 3D optical scanning technology. The...
Image segmentation has been and still is a challenge in computer vision. Regardless of the methods used to perform this task, almost always the result is the same: a set of areas representing locations of various items found in the image. If we wish to classify the areas into two types of data, the problem becomes separating foreground from background. Our proposed method starts with this supposition:...
The new IMO regulations require finding new solutions for marine applications as Antifouling treatment or ballast water treatment. Due to the effectiveness of using non-thermal plasma produced by electrical discharges for decontamination applications, it was chosen for use a GlidArc reactor for the antifouling treatment. Consequently, it was followed the best moment of the plasma treatment in order...
In this article one examine the topic of Building Information Modeling (BIM) from the perspective of the residential building' owners. We present a novel approach to estimate of energy consumption through the identification of the relevant parameters and the application of Soft Computing techniques.
The networked control systems (NCSs) have nowadays applications ranging from factory and home automation, to automotive and avionic control systems and to military and spatial applications. Their widely inclusion in the industry was mainly due to the inherent advantages, e.g. lower costs, simpler installation and maintenance, higher reliability and greater flexibility. Although the subject was extensively...
Genetic algorithms are probabilistic searching techniques that are able to provide results in complicated problems from various IT domains. The generated results depends directly by parameters of genetic algorithms operators (crossover and mutation probability, population size, number of generations, types of chromosomes, fitness function, etc.). In this paper it is proposed an adaptive type of crossover...
This paper presents simulation models of filters with operational amplifiers that can be used in digital simulators. It describes the real number modeling used for analog functionally, presents a practical implementation of the most important analog “component” - the operational amplifier used in a 1st order low-pass filter, and compares the proposed filter models with the classical SPICE models of...
Protection of information achieves keeping confidentiality, integrity, and availability of the data. These features are essential for the proper operation of modern industrial technologies, like Smart Grid. The complex grid system integrates many electronic devices that provide an efficient way of exploiting the power systems but cause many problems due to their vulnerabilities to attacks. The aim...
Piezoelectric energy harvesting has received great attention over the last 20 years. The main goal of this work is to discuss the potential advantages of introducing non-linearities in the dynamics of a beam type piezoelectric vibration energy harvester. The described device is essentially a cantilever beam partially covered by piezoelectric material with a force electromagnetically applied to the...
In the context of the increasing energy demand, renewable energy sources such as solar irradiation represent a much cheaper alternative for electrical energy production. The efficiency of solar energy conversion is influenced by photovoltaic cell performance and by power processing system. The power processing systems are designed to maximize the generated electrical power based on maximum power point...
The performance of the hybrid structures PV/TEG/STC which consist of photovoltaic cells PV, thermoelectric elements TEG and solar collector STC is studied in this paper function of different levels of illumination from 30 suns to 130 suns (1 sun = 1000 W/m2). The concentrated light is obtained using a solar simulator with four parabolic xenon lamps and an optical mixer to ensure the quasi homogenous...
The active filtering and regeneration systems used in active DC traction substations must allow the natural transition from filtering to regeneration mode and vice versa. In the both operation modes, active filtering and regeneration, the grid current must be sinusoidal. Consequently, the magnitude of the fundamental network current is necessary in the control part, in order to generate the reference...
The investigation of photovoltaic systems connected to the grid increased in the recent years due to low prices of the solar panels and the global concern on pollution and climate change. The single phase photovoltaic inverters produce harmonics that cause different problems to the grid. Therefore, the harmonic content of the currents injected into the grid is regulated by different standards like...
Power electronic converters for medium and high power / voltage applications employ low frequency synchronous fundamental switching to minimize semiconductor switching losses. There are two major approaches to converter switching angles determination - Selective Harmonic Elimination (SHE) and Total Harmonic Distortion (THD) minimization. For the THD minimization, converter switching angles are found...
To minimize semiconductor switching losses, power converters for medium and high power / voltage applications utilize low frequency synchronous fundamental switching. The two major approaches to switching angles determination are Selective Harmonic Elimination (SHE) and Total Harmonic Distortion (THD) minimization. For the THD minimization, the switching angles deliver minimal THD value without taking...
The world population depends highly on fossil fuels (for power generation, transportation, etc), this leads to oil price increases because of the depletion of fossil fuels. This paper is dealing with the use of RES in transportation. Pollution from the today transportation means, based on ICE (burning gas) especially in urban conglomerates and is off great concern. The renewable energy sources (RES)...
In battery supplied multilevel converters it is a common problem to maintain the energy balance between the energy storage placed in different modules. Large unbalance between the state-of-charge (SoC) appears when a damaged battery module is exchanged, and with high probability the newly inserted battery module has different SoC than the other modules. In case the unbalance is large it takes long...
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