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Experience-Based Cognition for Driving Behavioral Fingerprint Extraction
PublicationABSTRACT With the rapid progress of information technologies, cars have been made increasingly intelligent. This allows cars to act as cognitive agents, i.e., to acquire knowledge and understanding of the driving habits and behavioral characteristics of drivers (i.e., driving behavioral fingerprint) through experience. Such knowledge can be then reused to facilitate the interaction between a car and its driver, and to develop better and...
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TEMPERATURE INFLUENCE ON TIRE ROLLING RESISTANCE MEASUREMENTS QUALITY
PublicationGlobal warming makes it necessary to reduce energy consumption, which in the case of motor vehicles, is connected, among other things, with reduction of resistive forces acting on a vehicle during its motion. One of the most important components of those forces is rolling resistance, which is very difficult to measure, especially in road conditions. The article deals with issues related to the influence of the thermal state of...
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Investigations on the the dynamics of motor vehicle driving in nighttime conditions
PublicationThe article describes investigations on vehicle driving in nighttime conditions
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Tyre rolling resistance and its influence on fuel consumption
PublicationRolling resistance of tyres is one of the major resistive forces acting on any wheeled vehicle. Unfortunately, it is also one of the forces very difficult to measure. It is estimated that in certain traffic conditions (like for example constant speed driving with slow or moderate speed) so called Rolling Resistance Impact Factor may be as high as 0.3. This means that reduction of rolling resistance by 50% would lead to 15% of energy...
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Influence of Road Wetness on Tire-Pavement Rolling Resistance
PublicationRolling resistance of tires is one of the most important factors influencing energy consumption of road vehicles, especially on rural roads. For practical reasons, most of rolling resistance measurements are usually performed for dry road conditions. Based on the fact that roads are wet during a considerable time over the year and as part of the projects MIRIAM, ROLRES and ROSANNE, the TUG (Technical University of Gdańsk) in Poland...
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The influence of road surface unevenness on tyre rolling resistance
PublicationThe geometric characteristics of road surface substantially affect the interaction between tyre and road. Depending on pavement texture wavelength, the texture chiefly affects tyre/road friction, rolling resistance, interior and exterior noise, tyre wear, and ride comfort. The article presents results of investigations on the influence of road surface unevenness on the rolling resistance of passenger car and truck tyres. The tests...
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INFLUENCE OF LOAD AND INFLATION PRESSURE ON THE TYRE ROLLING RESISTANCE
PublicationTyre load and inflation pressure are important factors controlling rolling resistance of road vehicles. The article presents results obtained in the Technical University of Gdańsk during laboratory and road measurements of different car tyres rolling on different pavements. The knowledge of rolling resistance characteristics is important for modelling car dynamics as well as fuel consumption. It is also necessary to establish proper...
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Decreasing CO2 Emissions By Reducing Tire Rolling Resistance
PublicationThe first motor vehicle was built by Nicolas Cugnot almost 250 years ago and since then there has been a continuous process of motor vehicles’ improvements, as well as development of new road pavements. The fuel crisis of the 70s of the 20th century made it clear to vehicle builders that measures should be taken to reduce vehicle fuel consumption and it contributed to an increased interest in electric vehicles. Although significant...
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Local impedance spectra of organic coatings
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Local impedance spectra of organic coatings
PublicationPublikacja przedstawia nowe podejście do lokalnych spektroskopowych pomiarów impedancyjnych powłok organicznych, oparte o mikroskop sił atomowych pracujący w trybie kontaktowym. Pomiędzy nieporuszającą się igłę mikroskopu i podłoże metalowe pokryte powłoką epoksydową przyłożono serię sinusoidalnych napięciowych sygnałów pobudzenia w zadanym zakresie częstotliwości. W ten sposób zarejestrowano lokalne widma w trybie "frequency by...
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WETTABILITY OF HYBRID CHITOSAN/PHOSPHOLIPID COATINGS
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Advancements in Diamond-Like Carbon Coatings
PublicationAn essential resource for engineers and scientists in the coatings field, providing an in-depth examination of current and advanced technologies for industrially oriented nanoceramic and nanocomposite coatings
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Conducting coatings as anodes in cathodic protection
PublicationPrzedstawiono wyniki pomiarów elektrochemicznych powłok przewodzących opartych o mieszaninę pigmentów węglowych osadzonych w matrycy polimerowej. Wyznaczono parametry powłok przewodzących w oparciu o metodę elektrochemicznej spektroskopii impedancyjnej. Parametry elektryczne i elektrochemiczne były wyznaczane jednocześnie, w czasie długotrwałej anodowej polaryzacji badanych powłok. Stwierdzono, że badane powłoki mogą być używane...
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Infographics in Educational Settings: A Literature Review
PublicationInfographics are visual representations of data that utilize various graphic elements, including pie charts, bar graphs, line graphs, and histograms. Educators and designers can maximize the potential of infographics as powerful educational tools by carefully addressing challenges and capitalizing on emerging technologies. However, current education systems showcase the need for development guidelines and the best practices targeted...
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Cavitation erosion degradation of Belzona® coatings
PublicationIn hydrocarbon and maritime industry there is a constant need of materials and coatings withstanding severe conditions. One of adverse phenomena present there is cavitation erosion. The paper presents evaluation of cavitation resistance of three different steel coatings. Belzona 2141 (ACR-Fluid Elastormer), 1321 (Ceramic S-Steal) and 5831 (ST-Barrier) were deployed on P110 steel and subjected to ultrasound cavitation in distilled...
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Biopsy needles coated with the antimicrobial coatings
PublicationDrug delivery systems are used to achieve higher therapeutic effects of medicaments in a specific diseased site with minimal toxicological effect. The used of biopolymers in drug delivery systems ensure the biocompatibility, biodegradability and low immunogenicity. Drug delivery systems enhance the drug delivery actively and can be used in different diseases. In this study, two types of polymer coatings were prepared and were...
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Implementation of integrated control In drinking water distribution systems - IT system proposal
PublicationImplementation of integrated control algorithms requires suitable hardware and software platforms. Proposed solution must allow realizing control and monitoring tasks, while ensuring high reliability and security of processed data. Additionally, the software and hardware solutions must be immune to outside influence. This paper presents an approach to implementation of control systems in drinking water distribution system. Presented...
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Kernel PCA in Application to Leakage Detection in Drinking Water Distribution System
PublicationMonitoring plays an important role in advanced control of complex dynamic systems. Precise information about system's behaviour, including faults detection, enables efficient control. Proposed method- Kernel Principal Component Analysis (KPCA), a representative of machine learning, skilfully takes full advantage of the well known PCA method and extends its application to nonlinear case. The paper explains the general idea of KPCA...
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Clasification of drinking water samples using the Chernoff's faces visualization approach
PublicationOpracowanie przedstawia wyniki zastosowania wizualizacji metodą twarzy Chernoffa w klasyfikacji obszarowych zmian jakości wody pitnej, na podstawie wyników oznaczeń chloro- i bromopochodnych produktów dezynfekcji wody w 12 dzielnicach Gdańska w okresie 1993-2000.
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Kernel PCA in Application to Leakage Detection in Drinking Water Distribution System
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The original method of cutting power forecasting while wood sawing
PublicationEfekty energetyczne procesu przecinania drewna piłami (siły skrawania i moc skrawania) przy klasycznym podejściu do zagadnienia są określane na podstawie wartości właściwego powierzchniowego oporu skrawania. Z drugiej strony siły skrawania można rozważać z punktu widzenia współczesnej mechaniki pękania. Prognozowanie wartości kąta ścinania z zastosowaniem modeli uwzględniających wiązkość materiału obrabianego, ścinanie w płaszczyźnie...
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A Method and Device for 3D Recognition of Cutting Edge Micro Geometry
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On some approaches to cutting power estimation while wood sawing
PublicationW niniejszym artykule przedstawiono i porównano metody, które mogą być stosowane do szacowania mocy skrawania przy przecinaniu drewna na pilarkach tarczowych. Przy klasycznym podejściu efekty energetyczne procesu przecinania drewna piłami są obliczane na bazie właściwego powierzchniowego oporu skrawania. W internecie dostępne są narzędzia do określania mocy skrawania w postaci oprogramowania dostępnego on-line, przykładowo "Horsepower...
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Actinidia (Mini Kiwi) Fruit Quality in Relation to Summer Cutting
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Actinidia (Mini Kiwi) Fruit Quality in Relation to Summer Cutting
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A Study on the Residual Stress of Seam Pipe Cutting and Girth Welding
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Specific cutting resistance while sawing of wood - the size effect
PublicationW artykule przedstawiono wyniki analiz zmian właściwego oporu skrawania, przy zastosowaniu współczesnej mechaniki pękania z uwzględnieniem wiązkości. Analizy wykonano dla procesu przecinania drewna na pilarce ramowej PRW15M drewna jesionu i jesionu modyfikowanego termicznie. Zastosowane podejście pozwala na wyjaśnienie zjawiska wzrostu właściwego powierzchniowego oporu skrawania dla niewielkich grubości warstwy skrawanej jako efektu...
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Analysis of radial run-out of circular saw's cutting blades
PublicationW pracy przedstawiono analizę bicia promieniowego ostrzy pił tarczowych w procesie przecinania drewna. Analizę przeprowadzono na podstawie zróżnicowania grubości warstw skrawanych przez poszczególne ostrza piły. Dla przykładowej piły, zaprezentowano wyniki obliczeń przebiegów grubości warstw skrawanych przez poszczególne ostrza i grubości całkowitej warstwy skrawanej dla całej piły.
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A Method and Device for 3D Recognition of Cutting Edge Micro Geometry
PublicationA very useful method was successfully applied in the investigation of tools for machining wood and wood based composites. It allows scanning of the cutting edge micro geometry in three dimensions and reproducing it in a virtual space as a 3D surface. The application of the method opens new possibilities of studying tool wear by scanning, including the calculation of volume loss and other analysis of tool wedge geometry along and...
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Analysis and evaluation of grouping methods for effective cutting tool operation
PublicationThis article presents the possibilities for using cluster analysis in the assignment of machine tools in automated manufacturing systems. Based on the similarity of manufacturing processes in the system, cutting tools have been grouped. The objective was to obtain groups of similar objects, which could potentially ensure the reduction of the frequency and time of setups, optimizing the maintenance of tool resources and improving...
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Examination of tools of different materials edge geometry for MDF milling
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Impact of the surface evenness and texture on tire/road rolling resistance
PublicationThis paper deals with the issue of a surface's roughness and texture impact on tire/road rolling resistance. It includes a brief description of research aims, measurements and an analysis of results. It also presents observations and conclusions regarding drum facility modernisation which allows studies concerning surface's roughness and texture impact on tire/road rolling resistance.
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A Mechatronic Procedure of Vibration Surveillance During Milling of a Flexible Workpiece
PublicationArtykuł prezentuje mechatroniczne podejście do nadzorowania drgań podczas obróbki szybkościowej przedmiotów podatnych z wykorzystaniem aktywnego sterowania optymalnego. Układ sterowania składa się z aktywych wzbudników piezoelektrycznych przymocowanych do przedmiotu. Efektywnośc metody została potwierdzona symulacjami komputerowymi i badaniami eksperymentalnymi.
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Reduction of Tire Rolling Resistance by Optimization of Road Surfaces and Tires
PublicationDuring interaction between tire and road surface three very important phenomena are always in effect. One of them (very desirable) is friction that is important for traction, braking and cornering. Two other phenomena are not desirable at all, that is rolling resistance and noise. This paper discusses relations between road surface and tire parameters versus tire rolling resistance. Road surface texture, porosity, impedance, strength...
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Investigation on the edge forces in ball end milling of inclined surfaces
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The rolling contact fatigue of WC/C-coated spur gears
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Technological and tribological aspects of milling-burnishing process of complex surfaces
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Vibration Diagnostics of Rolling Mills Based on Nonlinear Effects in Dynamics
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Filling of Carbon Nanotubes: Containers for Magnetic Probes and Drug Delivery
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Reduction of noise and rolling resistance by horizontal grinding of asphalt pavements
PublicationGrinding of cement concrete pavements to reduce unevenness and noise is common since a long time. Grinding is then made with wheels equipped with diamond blades rotating in the vertical plane. This creates narrow vertical/longitudinal grooves in the pavement. It is not applied to asphalt pavements. In this paper an alternative type of grinding is studied. In this case plates with diamond heads rotate in the same plane as the pavement,...
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Method of sacrificial anode transistor-driving in cathodic protection system
PublicationA magnesium anode driving system has been proposed. A PNP driving transistor has been used. Electrochemical testing in 3%NaCl, results and comparison of the driving system and classic direct anode to cathode connection are presented. The driving system reduced the protection current and stabilized the working conditions of the anode. Higher anode efficiency was achieved. Overprotection and hydrogen embrittlement threats were prevented...
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Tool-workpiece vibration surveillance during slender end milling.
PublicationPraca poświęcona jest nowemu podejściu do nadzorowania drgań wirujących narzędzi we współczesnych frezarkach. Polega ono na sterowaniu programowym w układach niestacjonarnych. Dotyczy zamkniętych układów obrabiarek, kiedy to istotną rolę odgrywają drgania samowzbudne typu chatter. Sygnałem sterującym jest chwilowa zmiana prędkości obrotowej wrzeciona. Rozważano frezowanie czołowe smukłym frezem trzpieniowym na pionowym centrum...
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Vibration surveillance in modern milling machines by the spindle speed control.
PublicationPraca poświęcona jest nadzorowaniu drgań wirujących narzędzi w nowo-czesnych frezarkach. Polega ono na zastosowaniu sterowania programo-wego w układach niestacjonarnych. Dotyczy to zamkniętych układów obra-biarek, kiedy to istotną rolę odgrywają drgania samowzbudne typu chat-ter. Sygnałem sterującym jest chwilowa zmiana prędkości obrotowej. Rozważano frezowanie czołowe smukłym frezem trzpieniowym na pionowym centrum frezarskim....
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The spindle speed control for high speed milling vibration surveillance
PublicationW pracy przedstawiono zmodyfikowaną metodę nadzorowania drgań za pomocą sterowania optymalno-liniowego prędkością obrotową wrzeciona. Zamieszczono opis dynamiki skrawania, niestacjonarnego modelu obliczeniowego oraz metody nadzorowania drgań. Wykorzystano model modalny wirującego narzędzia, którego parametry wyznaczono zarówno metodami symulacji komputerowych, jak i - za pomocą eksperymentalnej analizy modalnej. Zamieszczono przykład...
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Comparison of Tire Rolling Resistance Measuring Methods for Different Surfaces
PublicationThe rolling resistance of car tires is one of the most important parameters characterizing tires today. This resistance has a very significant contribution to the energy consumption of wheeled vehicles. The climate crisis has forced tire and car manufacturers to place great emphasis on the environmental impact of their products. Paradoxically, the development of electric vehicles has led to an even greater importance of rolling...
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Selected Aspects of Pavement Texture Influence on Tire Rolling Resistance
PublicationTire rolling resistance has a significant influence on fuel consumption in cars and trucks and on CO2 emissions. Rolling resistance depends on the tire construction, pavement texture and stiffness, as well as environmental and traffic conditions. This article presents a pilot study on the impact of pavement texture on the rolling resistance of passenger car tires. Reasons why Mean Profile Depth is not a good descriptor of pavement...
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Synthesis of a state feedback controller for an averaging tank with variable filling
PublicationIn paper, a nonlinear averaging tank with variable filling is considered. The main purpose of this research work was the modelling and control system synthesis of an averaging tank. The control objectives included ensuring stability and zero steady-state error of the system and achieving settling time as short as possible, while maintaining a minimal overshoot. In order to achieve the intended purpose, firstly a mathematical model...
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Practical Eco-Driving Strategy for Suburban Electric Multiple Unit
PublicationIn this paper, a practical approach to velocity profile optimization for electric multiple unit was presented. The study focuses on a case of fast urban railway, which is a popular mean of transport across Tricity, Poland. Based on observations and measurements, a potential for improvement of energy efficiency by modifying the speed profile was recognized. In order to conduct necessary calculations, simulation model of railway...
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FPGA Based Real Time Simulations of the Face Milling Process
PublicationThe article presents a successful implementation of the milling process simulation at the Field-Programmable Gate Array (FPGA). By using FPGA, very rigorous Real-Time (RT) simulation requirements can be met. The response time of the FPGA simulations is significantly reduced, and the time synchronization is better than in a typical RT system implemented in software. The FPGA-based approach is characterized by enormous flexibility...
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Peculiarities associated with testing polyetheretherketone (PEEK) in a model rolling contact
PublicationPolyetheretherketone (PEEK) was investigated using a modified version of the four-ball tester in which the upper forth ball was replaced by a cone in such a way that kinematics of the four-ball configuration were fully preserved. Rotation of the cone enforced orbiting and rolling of the ceramic balls around the polymer cup. The results produced some unexpected peculiarities in the wear of ceramic balls which, in principle, should...