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Wyniki wyszukiwania dla: STRATY EGZERGETYCZNE
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Thermal Imaging Aided Assessment of a State of Equipment Under Test and its Protecting Elements
PublikacjaIn the paper the investigation results using thermal imaging methods are presented. The examined is a state of equipment under test and its protecting components. The estimations are done for the chosen protecting elements during surge immunity testing. The results show that the thermal imaging methods are useful for early detection of possible damage of a device being tested
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Adaptive state feedback speed controller for PMSM based on Artificial Bee Colony algorithm
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Parallel computing applied to auto-tuning of state feedback speed controller for PMSM drive
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Auto-Tuning Process of State Feedback Speed Controller Applied for Two-Mass System
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Gain‐scheduled constrained state feedback control of DC–DC buck power converter
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Artificial bee colony based auto-tuning of PMSM state feedback speed controller
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PMSM fed by 3-level NPC sinusoidal inverter with discrete state feedback controller
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PMSM servo‐drive control system with a state feedback and a load torque feedforward compensation
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Evolutionary design of combinational digital circuits: state of the art, main problems, and future trends
PublikacjaW artykule przedstawiono stan obecny, główne problemy oraz perspektywy dotyczące ewolucyjnego projektowania kombinacyjnych układów cyfrowych. Krótko scharakteryzowano istniejące algorytmy ewolucyjnego projektowania układów kombinacyjnych oraz przedstawiono ich ogólną koncepcję. wskazano również główne problemy tych algorytmów oraz potencjalne sposoby ich eliminacji.
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Investigation of Exhaust Emissions from DI Diesel Engine During Cold and Warm Start
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Exhaust Emission from Passenger Cars During Engine Cold Start and Warm-Up
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The effect of a low ambient temperature on the cold-start emissions and fuel consumption of passenger cars
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State action aimed at limiting financial exclusion in Poland in terms of sustainable and inclusive development
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Analytical Techniques for Determining Pharmaceutical Residues in Drinking Water – State of Art and Future Prospects
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Thermodynamic Characteristics of Phenacetin in Solid State and Saturated Solutions in Several Neat and Binary Solvents
PublikacjaThe thermodynamic properties of phenacetin in solid state and in saturated conditions in neat and binary solvents were characterized based on differential scanning calorimetry and spectroscopic solubility measurements. The temperature-related heat capacity values measured for both the solid and melt states were provided and used for precise determination of the values for ideal solubility, fusion thermodynamic functions, and...
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Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review
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An analysis of the causes and consequences of firefighters’ accidents at work in the State Fire Service in 2010 – 2016
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The State Of Lightguide Technology In Poland On The Basis Of The IV National Symposium "Optical Fibres And Their Applications"
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Current state of a dual behaviour of antimicrobial peptides-Therapeutic agents and promising delivery vectors
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Anab initiostudy of the betaine anion–dipole-bound anionic state of a model zwitterion system
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STATE OF DRAINAGE FACILITIES AND THEIR NEEDS OF MAINTENANCE IN THE MIĘDZYRZECZ INSPECTORATE ADMINISTERED BY THE LUBUSKI AMELIORATION BOARD
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Development of multilayer coatings for forming dies and tools of aluminium alloy from liquid state
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Production of wheat bread with spray-dried potato juice: Influence on dough and bread characteristics
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Spray-Dried Potato Juice as a Potential Functional Food Component with Gastrointestinal Protective Effects
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Application and modelling of Shape-Memory Alloys for structural vibration control: State-of-the-art review
PublikacjaOne of the most essential components of structural design for civil engineers is to build a system that is resistant to environmental conditions such as harsh chemical environments, and catastrophic disasters like earthquakes and hurricanes. Under these circumstances and disturbances, conventional building materials such as steel and concrete may demonstrate inadequate performance in the form of corrosion, deterioration, oxidizing,...
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Numerical analysis of the flow rig for UWS spray examination in exhaust system-relevant conditions
PublikacjaIn the present study, a flow rig with optical access intended for spray investigations in exhaust system-relevant conditions was analysed in terms of flow and temperature in the spray area using numerical simulations. The operation of the rig was examined for a wide range of exhaust mass flow rates, temperatures and various forms of UWS (urea-water solution) spray plumes. The locations of the injector and thermocouple were verified....
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Detection of some volatile degradation products released during photoexposition of ranitidine in a solid state
PublikacjaRanitidine (RAN) is on top of the list of prescribed drugs, due to its popularity as a selective H2-receptor antagonist, which efficiently decreases the amount of acid produced in the stomach. RAN is not stable both in a solid state and in a solution, which creates manufacturing problems, requires appropriate storage conditions, and results in a short drug shelf-life. The aim of this work was to study the emission of volatile...
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Modelling of wastewater treatment plant for monitoring and control purposes by state - space wavelet networks
PublikacjaMost of industrial processes are nonlinear, not stationary, and dynamical with at least few different time scales in their internal dynamics and hardly measured states. A biological wastewater treatment plant falls into this category. The paper considers modelling such processes for monitorning and control purposes by using State - Space Wavelet Neural Networks (SSWN). The modelling method is illustrated based on bioreactors of...
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Structural studies of methyl brevifolincarboxylate in solid state by means of NMR spectroscopy and DFT calculations
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Effect of liquid-state fermentation on the antioxidant and functional properties of raw and roasted buckwheat flours
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Triplet energy exchange between fluorescent and phosphorescent organic molecules in a solid state matrix.
PublikacjaW pracy przedstawiono model wymiany energii trypletów na podstawie mechanizmu Dextera i zweryfikowano go w układzie dwuamina TPD : organiczny komleks Ir(ppy)3: matryca poliwęglanowa, mierząc czasy życia emisji Ir(ppy)3 przy różnych koncentracjach molekuł TPD.
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Comparison of construction algorithms for minimal, acyclic, deterministicfinite state automata from sets of strings.
PublikacjaArtykuł porównuje różne metody tworzenia minimalnych, acyklicznych, deterministycznych automatów skończonych ze zbiorów słów. Wdrożone i porównane zostały metody przyrostowe, prawie przyrostowe i nieprzyrostowe.
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Gordon Decomposition of the Magnetizability of a Dirac One-Electron Atom in an Arbitrary Discrete Energy State
PublikacjaWe present analytical derivation of formulas for diamagnetic and paramagnetic contributions to magnetizabilities of relativistic hydrogenlike atoms being in an arbitrary discrete energy eigenstate.
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Experimental evidence of the excited-state mixing in the blue emitter for organic light-emitting diodes
PublikacjaHigh hopes have been placed on organic emitters, which are supposed to solve the problem of low stability of blue OLEDs. A peculiar phenomenon of thermally activated delayed fluorescence (TADF), which brought such emitters to the range of the top-studied materials for organic optoelectronics within the last decade, remains poorly understood. Here, we report the results of comprehensive photophysical studies of one of the most successful...
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The present state of requirements of international association of classification societies (IACS) for wrought aluminium alloys
PublikacjaW referacie przedstawiono aktualną sytuację w zakresie stopów aluminium z serii 5xxx i 6xxx do przeróbki plastycznej, ze szczególnym uwzględnieniem zmian w tym zakresie zapoczątkowanych przez unifikację wymagań w dokumentach nr 25 i 26 opublikowanychostatnio przez International Association of Classification Societies (IACS). Jednym z najważniejszych punktów w tych dokumentach jest wymaganie odnośnie przeprowadzania próby odporności...
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Modelowanie obszarów niebezpiecznych i pogodowych w procesie wyznaczania trasy przejścia statku
PublikacjaMinimalny obszar akwenu wokół poruszającego się statku zawarty w pewnych granicach nazywa się domeną. Obszar ten stanowi strefę bezpieczeństwa dla poruszającego się statku w którym nie powinien się znaleźć żaden inny obiekt nawigacyjny gdyż powoduje to ryzyko kolizji. Obszary przedstawiające złe warunki pogodowe nie są całkowicie zabronione i dlatego też opisywane są rozmytymi funkcjami przynależności. W pracy przedstawiono zależności...
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The effect of new non-cross resistant antitumor agents on the energy state of human erythrocytes
PublikacjaPrzebadano pochodne benzoperimidynowe i antrapirydonowe odnośnie ich wpływu na stan energetyczny ludzkich erytrocytów. Stwierdzono, że poziom nukleotydów jak i wartość AEC erytrocytów nie zmienił się w ciągu 24 h inkubacji z powyższymi związkami. Jest to wynik obiecujący w odniesieniu do ich zastosowania jako związków aktywnych w pokonywaniu oporności wielolekowej.
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Complementary study with magnetic and acoustic techniques of A336 steel damage state due to creep
PublikacjaBadano możliwość detekcji w sposób nieniszczący zmian w mikrostrukturze stali A336 poddanej próbie pełzania. Testowano dwie magnetyczne techniki (klasyczny efekt Barkhausena i emisję magnetoakustyczną) oraz dwie nowe techniki ultradźwiękowe (pomiar współczynnika elasto-akustycznego oraz dwójłomność akustyczną). Wykazano, iż wyniki badań akustycznych są komplementarne do wyników badań magnetycznych.
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Effects of full displacement pile installation on the stress and deformation state of surrounding soil: review
PublikacjaSeveral field and model tests have been conducted to investigate the impact of pile installation on bearing capacity. However, little is known about how piles behave during installation, how they interact with the surrounding soil, and how this affects sandy soil properties. This review paper investigates the effect of pile driving on surrounding sandy soil as it compacts sandy soil near to the pile. For this purpose, various related...
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Cyclic behavior of FeCoCrNiMn high entropy alloy coatings produced through cold spray
PublikacjaeCoCrNiMn high entropy alloy powders were employed to produce coatings on carbon steel through high pressure cold spray (at 1100 °C and 7 MPa in temperature and pressure respectively). X-ray diffraction of the sprayed material revealed a dense coating with the retention of the original crystallographic structure. Once splatted, particles revealed high flattening ratio with consequent excellent adhesion of the coating to the substrate....
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Biological processes modelling for MBR systems: A review of the state-of-the-art focusing on SMP and EPS
PublikacjaA mathematical correlation between biomass kinetic and membrane fouling can improve the understanding and spread of Membrane Bioreactor (MBR) technology, especially in solving the membrane fouling issues. On this behalf, this paper, produced by the International Water Association (IWA) Task Group on Membrane modelling and control, reviews the current state-of-the-art regarding the modelling of kinetic processes of biomass, focusing on...
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Development of a spray-ejector condenser for the use in a negative CO2 emission gas power plant
PublikacjaOne promising solution for developing low-emission power technologies is using gaseous fuel combustion in pure oxygen when the exhaust gas mixture is composed of H2O and CO2, and where CO2 is separated after steam condensation. The paper presents the results of computational analyses providing to the Spray-Ejector Condenser (SEC) development, which is one of the crucial components of the negative CO2 gas power plant (nCO2PP) cycle...
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Spray-Based Method for Protecting and Restoring Historic Adobe Walls Using Nanomontmorillonite Clay
PublikacjaRestoringandprotectinghistoricbuildingsworldwideareimportant becauseheritagebuildingsarerecordsofthecivilizationsofvariouscountries.Herein, nanotechnologywasusedtorestorehistoricadobewalls.AccordingtotheIranPatent andTrademarkOffice(IRPATENT)102665,nanomontmorilloniteclayhasbeen selectedasanaturalandcompatiblematerialwithadobe.Furthermore,ithasbeenused asnanospraytobeaminimallyinvasivemethodtofillcavitiesandcracksintheadobe surface.Variouspercentagesofnanomontmorilloniteclay(1−4%)intheethanolsolvent...
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The selective salinity and hydrazine parameters for the start-up of non-anammox-specific biomass SBR
PublikacjaThe presence of ammonium (NH 4+ ) in wastewater above the permissible limits leads to undesirable ecological impact and public health concerns. In this study, the anaerobic ammonium oxidizing (anammox) bacteria-mediated nitrogen removal was investigated using a sequential batch reactor (SBR). Effects of different salinity levels were evaluated on the bacterial activity at: mild (below 0.2 g NaCl/L), elevated (18.2 g NaCl/L) and...
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Friction Stir Welding of Aluminum in the Aerospace Industry: The Current Progress and State-of-the-Art Review
PublikacjaThe use of the friction stir welding (FSW) process as a relatively new solid-state welding technology in the aerospace industry has pushed forward several developments in different related aspects of this strategic industry. In terms of the FSW process itself, due to the geometric limitations involved in the conventional FSW process, many variants have been required over time to suit the different types of geometries and structures,...
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Second and third harmonic nonlinear optical process in spray pyrolysed Mg:ZnO thin films
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Comparison of state feedback and PID control of pressurizer water level in nuclear power plant
PublikacjaThe pressurizer water level control system in nuclear power plant with pressurized water reactor (PWR) is responsible for coolant mass balance. The main control goal is to stabilize the water level at a reference value and to suppress the effect of time-varying disturbances (e.g. coolant leakage in primary circuit pipeline system). In the process of PWR power plant operation incorrect water level may disturb pressure control or...
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Simulation of large thrust-bearing performance at transient states, warm and cold start-up
PublikacjaThe start-up of a large hydrodynamic thrust bearing of a vertical hydrogenerator is one of the most critical situations during the lifetime of a bearing. Hydrodynamic load capacity is low due to low speed and higher thermal deformations of the pad. A new approach to the simulation of a hydrodynamic bearing is shown in this article. A combination of finite elements method and computational fluid dynamics is used to perform the transient...
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The Current State-of-the-Art in the Determination of Pharmaceutical Residues in Environmental Matrices Using Hyphenated Techniques
PublikacjaSeveral thousand tons of pharmaceuticals and their transformation products (metabolites and degradation products) are introduced into the environment each year. They affect both human health and the environment, therefore, analytical procedures enabling the determination of a wide range of pharmaceuticals at trace levelswithminimal effort, time, and energy are required. Nowadays, hyphenated techniques are commonly applied in pharmaceutical...
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Wybrane problemy wyznaczania przebiegu trasy kolejowej z wykorzystaniem rozwiązań sieciowych GPS
PublikacjaW pracy zwrócono uwagę na niewystarczającą skuteczność stosowanych dotychczas na kolei metod kształtowania osi toru w płaszczyźnie poziomej. Sformułowano tezę, że możliwości radykalnej poprawy sytuacji stwarza metoda ciągłych pomiarów satelitarnych GPS, zastosowana przez zespół naukowy z Politechniki Gdańskiej. Przedstawiono ogólna charakterystykę pomiarów satelitarnych i opisano przebieg przeprowadzonych badań terenowych. Przeprowadzone...