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Search results for: PREFERENCJE DWUDZIESTOLATKÓW
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Broker telekomunikacyjny
PublicationDemonopolizacja rynku usług telekomunikacyjnych narzuca konieczność realizacji funkcji wyboru operatora sieci dla obsługi żądania usługi. W pracy przedstawiono koncepcję, realizację oraz wyniki testów i badań Brokera Telekomunikacyjnego BT, który realizuje tą funkcję. Algorytm podejmowania decyzji przez BT uwzględnia parametry poziomu i jakości usług oferowane przez operatorów oraz preferencje klienta dotyczące połączenia. Klient...
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Automatic Marking of Allophone Boundaries in Isolated English spoken Words
PublicationThe work presents a method that allows delimiting the borders of allophones in isolated English words. The described method is based on the DTW algorithm combining two signals, a reference signal and an analyzed one. As the reference signal, recordings from the MODALITY database were used, from which the words were extracted. This database was also used for tests, which were described. Test results show that the automatic determination...
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The most popular fields of study at full-time first-cycle studies and uniform master's studies in 2010/2011
Open Research DataUniversities try to adjust their didactic offer to the preferences of university candidates and the market situation. The socio-economic changes of the transformation period meant that specialists in the field of the market economy were in demand on the labor market. Subsequently, at universities, such fields as: "Management" or "Pedagogy" are ranked...
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Ball on disk test AL(rf.)-Al2O3-r25
Open Research DataHard particle reinforced Al6061 alloy testing. Laser remelting and kinetic injection of particulate material. Ball on disc tribological test. Ball material: Al2O3. Ball diameter: 5 mm. Sliding path radius: 25 mm. Disk material: Al6061 not treated (reference).
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Ball on disk test AL(rf.)-Al2O3-r15
Open Research DataHard particle reinforced Al6061 alloy testing. Laser remelting and kinetic injection of particulate material. Ball on disc tribological test. Ball material: Al2O3. Ball diameter: 5 mm. Sliding path radius: 15 mm. Disk material: Al6061 not treated (reference).
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The corrosion studies of 3,4,5-trihydroxybenzoic acid as an effective corrosion inhibitor of low alloy steel
Open Research DataThe dataset contains the electrochemical studies evaluating if gallic acid is a corrosion inhibitor for low alloy steel. Three measurements were carried out each case; corrosion potential (label ecorr), electrochemical impedance spectroscopy (label eis) and cyclic polarization (label cp). The measurements were carried out in sodium chloride, acidified...
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The Mott-Schottky characteristics of microwave pulsed-plasma polymerized allylamine by DEIS analysis
Open Research DataThe dataset contains the results obtained for the Mott-Schottky analysis of the microwave pulsed-plasma polymerized allylamine using the multifrequency perturbation signal with Dynamic Electrochemical Impedance Spectroscopy (DEIS) technique. The results were obtained using the perturbation composed of the elementary signals with a frequency range between...
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Elżbieta Cecerska-Heryć dr n.med.
PeopleWykształcenie i stopnie naukowe: 19.06.2018 r.ukończenie studiów doktoranckich z wyróżnieniem summa cum laudena Wydziale Lekarskim z OdziałemNauczania w Języku Angielskim PUM SzczecinStopień naukowy: doktor nauk medycznychWyższe2008-2013 Pomorski Uniwersytet Medyczny w Szczecinie Kierunek: Biotechnologia Specjalność: Biotechnologia MedycznaStudia licencjackie i magisterskieZatrudnienie...
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Rola szybkiej kolei miejskiej w Trójmieście w procesie racjonalizowania struktury logistycznej miasta Gdańska
PublicationW artykule zaprezentowano aktualne problemy komunikacyjne Śródmieścia Gdańska oraz przeobrażenia sposobu przemieszczania się w aspekcie rozbudowy systemu komunikacji szynowej, w tym - przede wszystkim - planowanego wydłużenia trasy SKM do nowego przystanku Gdańsk Śródmieście. Przedstawiono również preferencje i zachowania pasażerów kolei miejskiej w stosunku do integracji z innymi systemami komunikacyjnymi.
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An in-depth look at the tire rubber hardness influence on tire/road noise measurements
PublicationWhen assessing the acoustic quality of a road pavement with the close-proximity (CPX) or the on-board sound intensity (OBSI) method, the rubber hardness of the reference tire substantially affects the measurement. Practical experience shows that measurement tires can get significantly harder within a single measurement season. This is why one would like to normalize measurements to a reference rubber hardness. The recently published...
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Surface activation by cyclic polarization in 1M HCl and its effects on the electrochemical response of CB-PLA 3D printed electrodes
Open Research DataThe dataset contains the electrochemical studies performed for surface activation of the CB-PLA 3D printed electrodes by electrolysis in 1M HCl solution. The studies were performed after treatment at different polarization ranges, as labeled in subfolder names. For each electrode the consecutive studies describe different samples, as labeled in subfolders:...
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To Work or Not to Work… in a Multicultural Team?
PublicationThe main goal of the article is to present research findings regarding student’s attitude to working in a multicultural team (MCT). Research participants of different cultural background completed the research survey. Their willingness to work in MCT was measured together with factors that influence it. These include factors related to both team members and the task structure. Research findings indicate that the respondents preferred...
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Measure small currents without adding resistive insertion loss
PublicationFloating current to voltage converter can be inserted in-line with no voltage drop and no need for a ground reference.
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Kogeneracja gazowa w nowych uwarunkowaniach po implementacji dyrektywy europejskiej
PublicationW artykule omówiono krajowe uregulowania dotyczące obowiązku zakupu energii elektrycznej wytwarzanej w skojarzeniu z wytwarzaniem ciepła. Opóźniona implementacja do ustawodawstwa krajowego Dyrektywy europejskiej o wspieraniu kogeneracji zmieniła uwarunkowania funkcjonowania źródeł skojarzonych na rynkach energii. Wprowadzono mechanizm obrotu świadectwami pochodzenia energii. Szczególne preferencje przyjęto dla wsparcia małych układów...
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A measurement method for lossy capacitive relative humidity sensors based on a direct sensor-to-microcontroller interface circuit
PublicationA new time-domain measurement method for determining the capacitance and resistance values of lossy relative humidity capacitive sensors is presented. The method is based on a direct sensor-to-microcontroller interface for microcontrollers with internal analog comparators and timers. The interface circuit consists only of four reference resistors (two reference resistors if a microcontroller includes a voltage reference source),...
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System pozycjonowania dynamicznego morskich jednostek pływających jako system mechatroniczny
PublicationW artykule przedstawiano system pozycjonowania dynamicznego półzanurzeniowej platformy wiertniczej, który jest rozpatrywany jako system mechatroniczny. W szczególności zaś zaprezentowano systemy referencyjne utrzymania stanowiska pozycyjnego na morzu, urządzenia nawigacyjne, czujniki ruchów własnych jednostki pływającej i anemometry rozważane jako czujniki systemu mechatronicznego oraz pędniki azymutalne rozważane jako nastawniki...
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On Dynamic Extension of a Local Material Symmetry Group for Micropolar Media
PublicationFor micropolar media we present a new definition of the local material symmetry group considering invariant properties of the both kinetic energy and strain energy density under changes of a reference placement. Unlike simple (Cauchy) materials, micropolar media can be characterized through two kinematically independent fields, that are translation vector and orthogonal microrotation tensor. In other words, in micropolar continua...
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Personal adaptive tuning of mobile computer audio
PublicationAn integrated methodology for enhancing audio quality in mobile computers is presented. The key features are adaptation of the characteristics of the acoustic track to the changing conditions and to the user's individual preferences. Original signal processing algorithms are introduced, which concern: linearization of frequency response, dialogue intelligibility enhancement and dynamics processing tuned up to the user's preferences....
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Combined operation of 900MW power plant with the ORC through the bleed steam extraction point and CO2 recovery system
PublicationThe work presented here is aimed at utylisation of waste heat in the reference supercritical power plant in the manner to produce electricity in ORC installation. The waste heat is available in the form of a stream of hot water at 90 C, recovered from the exhaust gases in the amount of 200MW. Such low enthalpy heat source is rather insufficient to produce a good quality vapour to feed the ORC turbine. Therefore an original approach...
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Position and Orientation Estimation in Radio Network With Groups of Locally Synchronized Nodes
PublicationThis article presents a positioning system with groups of locally synchronized nodes. A mobile object is equipped with a group of several synchronized receivers that are able to measure the difference in the time of arrival of signals from reference transmitters. The reference transmitters are synchronized only in local groups, with no global synchronization between groups. It is assumed that the synchronous operation of transmitters...
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The efficiency of turbomachinery in the zero-and three-dimensional approaches
PublicationEfficiency of turbomachinery is usually defined using an isentropic process. This approach provides a reliable reference point only when pressure and temperature measurements are available, e.g. at the casing inlet and outlet. In the case of a single stage internal efficiency determination the reference point is difficult. Computational fluid dynamics allows for an exact calculation of values of losses occurring in a turbine...
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DETERMINATION OF VERTICAL DISPLACEMENTS IN RELATIVE MONITORING NETWORKS
PublicationThe problem of determining displacements of objects is an important and current issue, in particular in terms of operational safety. This is a requirement that covers geodetic, periodic control measurements in order to determine horizontal and vertical displacements. The paper is focused on the analysis of vertical displacements. Geodetic measurements and their interpretation allow to reduce the risk of possible structural catastrophes....
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APPLYING RANSAC ALGORITHM FOR FITTING SCANNING STRIPS FROM AIRBORNE LASER SCANNING
PublicationDuring the development of the data acquired by airborne laser scanning the important issue is the fitting and georeferencing of ALS point clouds by means of the tie surfaces and the reference planes. The process of scanning strips adjustment is based on mutual integration of point clouds (scanning strips) and their adaptation to the reference planes.In simultaneous adjustment all strips are combined into one geometrically coherent...
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Sensorless predictive control of three-phase parallel active filter
PublicationThe paper presents the control system of parallel active power filter (APF) with predictive reference current calculation and model based predictive current control. The novel estimator and predictor of grid emf is proposed for AC voltage sensorless operation of APF, regardless of distortion of this voltage. Proposed control system provides control of APF current with high precision and dynamics limited only by filter circuit parameters....
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Discount for children deducted from tax in selected EU countries, available according to number of children criterion (in EUR) in 2017
Open Research DataWhen analyzing the collected data, it should be indicated that the amount of tax preferences addressed to families with children varies widely and ranges from several hundred euro to even several tens of thousands of euro relief annually. The highest family allowances, calculated in absolute terms, are in Germany, and the lowest in Poland. All countries,...
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Sektor B2C w Polsce - badanie działań rynkowych stosowanych przez wybrane serwisy e-commerce
PublicationPoznanie preferencji konsumentów w odniesieniu do czynników, poprzez które serwisy handlowe starają się oddziaływać na internautów, pozwala na ich lepsze dopasowanie do oczekiwań konsumentów oraz na opracowanie skutecznych form komunikacji wspierającej sprzedaż. Artykuł prezentuje wybrane wyniki trzech etapów badań empirycznych.
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The geodetic monitoring of the engineering structure – a practical solution of the problem in 3D space
PublicationThe study raises the issues concerning the automatic system designed for the monitoring of movement of controlled points, located on the roof covering of the Forest Opera in Sopot. It presents the calculation algorithm proposed by authors. It takes into account the specific design and location of the test object. High forest stand makes it difficult to use distant reference points. Hence the reference points used to study the stability...
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ADMINISTRACYJNE I PODATKOWE MECHANIZMY WSPARCIA ZAKUPU I EKSPLOATACJI SAMOCHODÓW ELEKTRYCZNYCH W POLSCE I INNYCH KRAJACH EUROPEJSKICH = Administrative and taxation mechanisms to support the purchase and maintenance of electric vehicles on the example of selected european countries
PublicationPrzedmiot i cel pracy: Celem artykułu jest przegląd obecnie stosowanych mechanizmów wsparcia zakupu samochodów elektrycznych, ze szczególnym uwzględnieniem ulg i zwolnień podatkowych. Materiały i metody: W artykule zastosowano metodę badawczą polegającą na przeglądzie literatury, przepisów prawa oraz raportów branżowych dotyczących opisywanego zagadnienia. Wyniki: Autorzy przeanalizowali rynek samochodów elektrycznych na świecie...
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Porządkowanie wariantów przy niekompletnych macierzach porównań parami.
PublicationArtykuł dotyczy porządkowania wariantów w wieloatrybutowych zagadnieniach decyzyjnych z wykorzystaniem porównań parami tych wariantów poprzez wyrażenie preferencji względnej. W oparciu o wyrażone opinie dotyczące preferencji tworzona jest kwadratowa macierz ocen, na podstawie której obliczane są wagi dla poszczególnych wariantów wyrażające ich uporządkowanie na skali liczbowej. Jedną z powszechnie stosowanych tutaj metod jest...
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Entrepreneurs' intention to use tax relief
Open Research DataThe dataset presents the results of research conducted by the author among Polish entrepreneurs in 2017–2020. The diagnostic survey method was used to collect primary data among enterprises from the SME sector. The measurement instrument was a survey questionnaire developed by the author. This study is a key piece of research. The aim was to examine...
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Światło dzienne w projektowaniu? Rezultaty badań ankietowych i ćwiczeń analityczno-projektowych wśród studentów architektury i urbanistyki z tematyki oświetlenia dziennego
PublicationArtykuł przedstawia wyniki badań ankietowych i ćwiczeń analitycznych dotyczących oceny oświetlenia dziennego (percepcja, wiedza, preferencje) przeprowadzonych wśród 140 studentów architektury. Wyniki mogą sugerować, że percepcja i opis oświetlenia dziennego opierał się na intuicji respondentów. Analiza udzielonych odpowiedzi ilustruje, że na umiejętność krytycznej interpretacji zaobserwowanych warunków oświetlenia i projektowego...
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Aktywność inwestorów indywidualnych na Giełdzie Papierów Wartościowych w Warszawie
PublicationInwestorzy indywidualni mają obecnie duże możliwości lokowania na rynku giełdowym swoich oszczędności. Wielość instrumentów finansowych zwiększa atrakcyjność rynku i umożliwia tworzenie zindywidualizowanych portfeli inwestycyjnych. Indywidualnych inwestorów giełdowych charakteryzują określone preferencje, co do wyboru instrumentów finansowych. W niniejszym rozdziale monografii autor analizuje zmiany w aktywności inwestorów indywidualnych...
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Monitoring the gas turbine start-up phase on the platform using a hierarchical model based on Multi-Layer Perceptron networks
PublicationVery often, the operation of diagnostic systems is related to the evaluation of process functionality, where the diagnostics is carried out using reference models prepared on the basis of the process description in the nominal state. The main goal of the work is to develop a hierarchical gas turbine reference model for the estimation of start-up parameters based on multi-layer perceptron neural networks. A functional decomposition...
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Application of the ‘CPT 2012’model of AFNOR standard for column design in Poland–Jazowa case study
Publicationhis paper presents the ‘CPT 2012’ model incorporated into the AFNOR NF P94-262:2012-07, French standard for pile design fully compatible with Eurocode 7, to the wider Polish audience. The bearing capacity of three reference columns for Vistula Marshlands have been calculated according to ‘CPT 2012’ model and AFNOR recommendations. Then, the design resistances have been compared with ultimate column bearing capacity measured during...
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Modified SPWM Technique with Zero-Sequence Voltage Injection for a Five-Phase, Three-Level NPC Inverter
PublicationThis article presents a modified sinusoidal pulse-width modulation (SPWM) scheme for a five-phase, three-level neutral-point-clamped inverter. The modulation scheme deploys a modified min–max function to inject the zero-sequence components into the reference modulating signals; hence enabling the effective utilization of the DC-link voltage. Balanced split-input DC-link voltages were achieved through further incorporation of adjustable...
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Zastosowanie metody AHP do porównania kryteriów wyboru lokalizacji budowy farmy wiatrowej
PublicationArtykuł przedstawia opis oraz porównanie kryteriów wyboru lokalizacji farmy wiatrowej. Kryteria te uwzględniają pomiary wietrzności na rozpatrywanym terenie, lokalizację turbin wiatrowych, lokalizację linii elektroenergetycznej służącej do przesyłu wyprodukowanej energii elektrycznej od farmy wiatrowej do stacji elektroenergetycznej (GPZ), infrastrukturę towarzyszącą, warunki techniczne przyłączenia do sieci elektroenergetycznej...
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Electrochemical studies of Boron-Doped Diamond enriched Laser Induced Graphene structures
Open Research DataThis dataset contains electrochemical studies aimed to evaluate the capability of the utilization of laser-induced graphene (LIG) with incorporated boron-doped diamond nanowall (BDNW) hybrid nanostructures for microsupercapacitors. Selected results from this dataset were published in Advanced Functional Materials journal: https://doi.org/10.1002/adfm.202206097
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Social enterprises as a fertile ground for reducing social and economic exclusion - good practice examples from Poland
PublicationThe work briefly outlines the two dimensions of value generated by social enterprises to the economy and society. This is done in reference to the social cooperatives in Poland that are good examples of social enterprises according to EMES indicators
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Topography studies of screen-printed carbon electrodes (SPCE) with boron-doped diamond foils
Open Research DataThis dataset contains topography examination of SPCE containing boron-doped diamond BDD foils done with scanning electron microscope. Different points mark different electrode spots: A) working electrode, B) reference electrode, C) counter electrode, D) pads.
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Application of Analytic Signal and Smooth Interpolation in Pulse Width Modulation for Conventional Matrix Converters
PublicationThe paper proposes an alternative and novel approach to the PWM duty cycles computation for Conventional Matrix Converters (CMC) fed by balanced, unbalanced or non–sinusoidal AC voltage sources. The presented solution simplifies the prototyping of direct modulation algorithms. PWM duty cycles are calculated faster by the smooth interpolation technique, using only vector coordinates, without trigonometric functions and angles. Both...
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Context-aware User Modelling and Generation of Recommendations in Recommender Systems
PublicationRecommender systems are software tools and techniques which aim at suggesting new items that may be of interest to a user. This dissertation is focused on four problems in recommender systems domain. The first one is context-awareness, i.e. how to obtain relevant contextual information, how to model user preferences in a context and use them to make predictions. The second one is multi-domain recommendation, which aim at suggesting...
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Electrochemical investigations on the corrosion behaviour of reinforcing steel in diatomite- and zeolite-containing concrete exposed to sulphuric acid
PublicationCorrosion is a major concern for most structural applications. Its detrimental effect significantly reduces the life of metallic components. This paper presents the results of an experimental investigation of corrosion in the steel reinforcement of concrete samples having three different substituents: 20% diatomite, 20% zeolite, and a reference without zeolite or diatomite. All concrete specimens were subjected to a solution of...
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Increase of power and efficiency of the 900 MW supercritical power plant through incorporation of the ORC
PublicationThe objective of the paper is to analyse thermodynamical and operational parameters of the supercritical power plant with reference conditions as well as following the introduction of the hybrid system incorporating ORC. In ORC the upper heat source is a stream of hot water from the system of heat recovery having temperature of 90 °C, which is additionally aided by heat from the bleeds of the steam turbine. Thermodynamical analysis...
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Tetrahedrally modified MnMe0.1Co1.9O4 (Me = Zn, Mg, Li) spinels for non-enzymatic glucose sensing
PublicationIn this work, tetrahedrally modified MnMe0.1Co1.9O4 (Me = Zn, Mg, Li) spinels were prepared via the sol–gel synthesis method with subsequent ball-milling fragmentation. The prepared samples were evaluated as glucose–sensing catalyst. The reference MnCo2O4 spinel exhibited a sensitivity of 49 µA mM−1 cm−2 and a nonlinearity error of 5.2% in the response range from 0.02 to 1 mM. The partial substitution of cobalt in the reference...
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Razem czy osobno - zespoły a działania przedsiębiorcze
PublicationPrzedsiębiorczość rozumiana jako atrybut jednostki, charakteryzowana jest ponad 40 pojęciami. Wiadomo jest jednak, że zakres i różnorodność kompetencji pojedynczej osoby jest zazwyczaj mniejszy niż zespołu. Jednostka może posiadać wybitną wiedzę, niezwykły poziom umiejętności i ogromne doświadczenie, ale ich zakres może zostać rozszerzony o właściwie dobrane kompetencje innej jednostki. Z drugiej strony zarówno działania zespołowe...
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Estymacja parametrów kanału NB-IoT w łączu w dół.
PublicationArtykuł dotyczy doboru metody estymacji parametrów kanału, odpowiedniej do zastosowania w terminalu wąskopasmowego Internetu Rzeczy. Przedstawiono strukturę sygnału pilotowego NRS, używanego do wyznaczenia współczynników kanału w LTE-NB. Zaproponowano cztery warianty metody wyznaczenia współczynników kanału dla całej ramki transmisyjnej. Dokonano oceny tych wariantów w oparciu o dwa wskaźniki jakościowe skojarzone z błędem odtworzonych...
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Sensorless Multiscalar Control of Five-Phase Induction Machine with Inverter Output Filter
PublicationThe paper presents a complete solution for speed sensorless control system for five-phase induction motor with voltage inverter, LC filter and nonlinear control of combined fundamental and third harmonic flux distribution. The control principle, also known as multiscalar control, nonlinear control or natural variables control, is based on a use of properly selected scalar variables in control feedback to linearize controlled system....
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A CONTEXT IN RECOMMENDER SYSTEMS
PublicationRecommender systems aim to propose potentially interesting items to a user based on his preferences or previous interaction with the system. In the last decade, researcher found out that known recommendation techniques are not sufficient to predict user decisions. It has been noticed that user preferences strongly depend on the context in which he currently is. This raises new challenges for the researchers such as how to obtain...
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Oxolane Ammonium Salts (Muscarine-Like)—Synthesis and Microbiological Activity
PublicationCommercially available 2-deoxy-D-ribose was used to synthesize the appropriate oxolane derivative—(2R,3S)-2-(hydroxymethyl)oxolan-3-ol—by reduction and dehydration/cyclization in an acidic aqueous solution. Its monotosyl derivative, as a result of the quaternization reaction, allowed us to obtain eight new muscarine-type derivatives containing a quaternary nitrogen atom and a hydroxyl group linked to the oxolane ring. Their structure...
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Heat exchange enhancement of jet impingement cooling with the novel humped-cone heat sink
PublicationJet impingement cooling technology is applicable to control temperature of devices, where very high heat flux is generated within a small area. This paper is about the improvement of the jet impingement cooling efficiency by the heat sink geometry modification. Two reference cases were sourced from the literature – flat heat sink and modified one with cone in the jet stagnation region. Such a change improves cooling capability...