Much of today’s power grid was designed and built using technologies organizational principles developed decades ago. The lack energy resources classic networks are the main causes development smart to efficiently use resources, with stable safe operation. In such a network, one fundamental priorities is provided by non-intrusive appliance load monitoring (NIALM) in order analyze, recognize determine electricity consumption each consumer. this paper, we propose new system approach for...

A novel coaxial-line-based helical leaky-wave antenna (LWA) with circular polarization (CP) is presented in this work. The CP achieved thanks to a helical-shaped slot edged on the outer conductor of coaxial line that allows for controlled radiation when fundamental TEM mode fed. Thus, periodic-like LWA formed frequency-scanning conical beam and suppressed open stopband continuous along slot. This way, efficiency can be kept high wide scanning range. prototype has been designed manufactured...

This paper studies both the thermal and mechanical behavior of brake system models in case emergency braking a mine hoist model. Using step-by-step approach inspired by conducted on small systems with high rotation speeds specific to road rail vehicles, comparative analysis using computer simulation was performed for two types brakes system. A Solidworks model built configurations: drum-and-shoe disc-and-pads, it imported COMSOL Multiphysics, where material properties parameters were...

Nowadays, unmanned aerial vehicles/drones are involved in a continuously growing number of security incidents. Therefore, the research interest drone versus human movement detection and characterization is justified by fact that such devices represent potential threat for indoor/office intrusion, while normally, presence allowed after passing several points. Our paper comparatively characterizes an indoor environment. The map was obtained using advanced signal processing methods as wavelet...

Combustion in ultrasonic field is a promising combustion technology as it provides high efficiency and low pollutant emission. Imposing acoustic oscillations on flame front enhances the turbulent mixing, resulting reduced NOx CO emissions length. The can be generated by using two types of devices: piezoelectric devices sonic nozzle. In this paper, characteristics nozzle attached to gas burner have been experimentally numerically studied. intensity adjusted modifying pressure feeding air or...

In radar literature, the sidelobes reduction techniques using synthesis of some proper nonlinear FM (NLFM) laws represents a major scientific research direction. Accordingly, in order to assure suppression, main objective this paper is present an adequate algorithm NLFM based on stationary phase principle. The achieved experimental results confirm significant (i.e., more than -40 dB) without necessity apply weighting techniques. Finally, analysis synthesized by ambiguity function tool was...

In this paper we propose a new approach for characterization of home appliances load signature (electrical fingerprint) from Recurrence Plot Analysis (RPA) perspective, with the goal non-intrusive appliance monitoring (NIALM), promoted as enabling technology to save energy consumption and lower consumers electrical bills. our research work, RPA is adopted an analysis tool non-linear current waveform in phase space it considered innovative signal processing method alongside traditional time...

Starting from the general principles of material cutting, with applicability to coal and overburden excavation using bucket wheel excavators (BWEs), this paper proposes another method for calculating drive power excavator by computer modeling. This approach required two steps. In first step, volume excavated one slewing movement boom a particular geometry was determined, time in open pit mine measured. second one, values specific energy (SE) consumption cutting were determined laboratory...

Electrical contacts are important circuit components with diverse industrial applications, and their failure can lead to multiple unwanted effects. Hence, the behavior of electrical is a widely studied topic in scientific literature based on various approaches, tools, techniques. The present study proposes new approach numerical modeling simulation Holm contact theory, aiming dependence between electric potential temperature within an contact. Structured five sections, research was conducted...

In this study, we present the implementation of a neural network model capable classifying radio frequency identification (RFID) tags based on their electromagnetic (EM) signature for authentication applications. One important application chipless RFID addresses counterfeiting threat manufacturers. The goal is to design and implement that possess unique unclonable fingerprint authenticate objects. As EM characteristics are employed, these fingerprints cannot be easily spoofed. A set 18...

The numerical simulation of biomass combustion requires a model that must contain, on one hand, sub-models for conversion to primary products, which involves calculations heat transfer, decomposition rate, product fractions, chemical composition, and material properties, the other volatile products transport inside outside particle, their combustion, char reduction/oxidation. Creating such complete mathematical is particularly challenging; therefore, present study proposes versatile...

The need for reducing fossil fuel consumption and greenhouse gas (GHG) emissions in internal combustion engines has raised the opportunity use of renewable energy sources. For progressive replacement fuels like diesel, those derived from sustainable management forest resources may be a good option. In Portugal, pine trees (pinus pinaster) are among most widely cultivated tree species. Turpentine can extracted their sap without harming tree. is known to with lower viscosity than regular...

Military heavy vehicle drivers experience low-frequency vibrations that are associated with fatigue, drowsiness, and other adverse health effects. The existing research papers focus on performing different types of analysis, but few use advance signal processing tools based recurrence plot representation; therefore, the main goal this paper is to assess whole-body vibration (WBV) hand-arm (HAV) exposure a driver, comparing armoured personnel carriers cargo destined vehicles. For purpose,...

Anthropogenic activities related to mining generate both progress and a vast amount of waste that is responsible for environmental degradation. The Jiu Valley one the areas Romania where has affected large land, used build mines tailings ponds. former Coroiesti coal processing plant (CCPP) such location with total area 25 ha containing approximately 5.5 million tons tailings. assessment stability dams extremely important from safety aspects. This study proposes solution based on numerical...

According to pulse-compression radar theory, the sidelobe reduction using nonlinear frequency modulation (NLFM) signal processing represents a major and present research direction. Although in literature lot of techniques design efficient NLFM waveforms are indicated, one most important methods as application area is focused on stationary phase technique (SPT) use. Consequently, main objective this paper make an extended comparative study suppression among some very promising laws achieved...

We present the results of systematic application first trimester combined test for aneuploidies, in a Romanian center.Since October 2009, Filantropia Hospital Bucharest, we have systematically been using FMF (Fetal Medicine Foundation) to screen common aneuploidies at 11 13 + 6 weeks gestation. assessed crown rump length (CRL), nuchal translucency, fetal heart rate as well PAPP-A, and free β-hCG maternal serum. evaluated additional ultrasound markers most cases. The individual risk was...

In this paper an original method for the synthesis of a planar sparse array antenna is presented. The aim to obtain starting from Dolph Chebyshev radiating elements feeding distribution and cancelling as large number possible while maintaining performances in terms directivity characteristics, by applying optimization with genetic algorithms. Planar antennas square shapes variable are analyzed synthesized using new method.

In the last years, commercial drone/unmanned aerial vehicles market has grown due to their technological performances (provided by multiple onboard available sensors), low price, and ease of use. Being very attractive for an increasing number applications, presence represents a major issue public or classified areas with special status, because rising incidents. Our paper proposes new approach drone movement detection characterization based on ultra-wide band (UWB) sensing system advanced...

Breakdown of stackers and excavators in opencast mines is possible because operating, manufacturing structural causes, it produces high financial losses. These can be prevented by using various measures, including analyses strength tests, with computerized modeling simulation FEA or other techniques being implemented the recent years. In this paper a fatigue study conducted on boom BWE. Based computer model previously developed SOLIDWORKS our author team, first modal analysis for three...

The sustainable exploitation of raw materials, with improved safety and increased productivity, is closely linked to the development mechanical mining installations. Mine hoists are designed for transport material, equipment personnel between mine surface underground. hoist braking system paramount importance in its safe operation. Thus, both drum disc brake systems, temperature friction surfaces important ensuring efficient braking, as exceeding threshold causes a decrease capacity. In this...

This paper presents the design of circular antenna array with isotropic radiators by optimization using genetic algorithms. The problem consists in obtaining an imposed radiation pattern starting from a uniform array. goal is achieved non-uniform distances between circles which are disposed on and distribution currents through successive circles. work results conclusions reveal advantage our approach versus Also important result reduction number variables fitness function, creates good...

Thermostats operate alongside intelligent home automation systems for ensuring both the comfort of occupants as well responsible use energy. The effectiveness such solutions relies on ability adopted control methodology to respond changes in surrounding environment. In this regard, process disturbances severe wind or fluctuating ambient temperatures must be taken into account. present paper proposes a new approach estimating heat transfer residential buildings by employing lumped parameter...

Electrical contacts are important circuit components with diverse industrial applications, and their failure can lead to multiple unwanted effects. Hence, the behavior of electrical is a widely studied topic in scientific literature based on various approaches, tools, techniques. The present study proposes numerical modeling simulation approach Holm contact theory dependence between electric potential temperature within an contact. Structured 5 sections, research was conducted using COMSOL...

Waste heat recovery from exhaust gas is one of the most convenient methods to save energy in internal combustion engine-driven vehicles. This paper aims investigate a reduction waste an engine serial Diesel–electric hybrid bus by recovering part and converting it into useful power with help split-flow supercritical CO2 (sCO2) recompression Brayton cycle. It can recover 17.01 kW total 33.47 contained 151 engine. The thermal efficiency cycle 38.51%, net 6.55 kW. variation sCO2 temperature at...