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Search results for: ROBOTY RÓWNOLEGŁE
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Problemy z oznaczaniem zawartości fazy stałej z zastosowaniem normy ISO 8292 = Problems with the solid fat content determination using the ISO 8292 standard.
PublicationZawartość fazy stałej (SFC) jest parametrem charakteryzującym właściwości fizyczne i użytkowe tłuszczów stałych. Otrzymanie prawidłowego wyniku zależy od zastosowania odpowiedniej procedury termostatowania próbki przed pomiarem, a ta z zależy od rodzaju badanego tłuszczu. Przed oznaczeniem SFC wszystkie TAG, które są stałe w temperaturze 0oC powinny wykrystalizować, a tłuszcz osiągnąć trwałą formę krystaliczną. Pierwsza norma IUPAC...
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Price convergence in the European Union and in the new member states
PublicationThis paper examines price dispersion in the European Union (EU15) and in three New Member States (Poland, Hungary and the Czech Republic) between 1995 and 2006. The analysis utilizes both disaggregate and aggregate price data, including the prices of 157 products and two indices constructed using two different weighting procedures. For each category of goods the price dispersion is lower in EU15 than EU15 plus 3 NMS. Sigma convergence...
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Experiment-aided virtual prototyping to minimize tool-workpiece vibration during boring of large-sized structures
PublicationThe paper presents the author's method of solving the problems of vi-bration suppression during boring of large-sized workpieces by means of an in-novative method of adjusting the rotational speed of the boring bar. It consists in selecting the spindle speed in accordance with the results of the cutting process simulation. The method includes identification of the model of the finite element method of the boring bar. The Root Mean...
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The Use of Vegetables in the Biomonitoring of Cadmium and Lead Pollution in the Environment
PublicationLead and cadmium emitted from various anthropogenic sources have the ability to accumulate in tissues of living organisms. The phenomenon of accumulation of metals in the body is harmful and undesirable. On the other hand, the ability of plants to accumulate heavy metals from the individual elements of the environment has been used in biomonitoring of pollution. Leaf and root of vegetables have particular predisposition for accumulating...
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Experimental and theoretical study of flow boiling and dryout phenomenon of ethanol in vertical minitubes
PublicationW ramach przeprowadzonych prac zaadoptowano istniejące stanowisko do badań laminarnej konwekcji wymuszonej, wrzenia w przepływie oraz wysychania filmu cieczy na ściance kanału wykorzystując etanol jako płyn roboczy. Przeprowadzono systematyczne badania wrzenia w przepływie dla dwóch średnic rur, tj. 1.15mm i 2.3mm. W badaniach wykorzystano najnowsze osiągnięcia z zakresu technik termowizyjnych celem znalezienia dokładnej lokalizacji...
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Platforma aktywnego nauczania dla zwiększenia poziomu umiejętności techników i inżynierów
PublicationPrzemysł 4.0 całkowicie przekształca sektor wytwórczy w Unii Europejskiej wprowadzając zasady cyfryzacji procesów przemysłowych. W rezultacie, nowe cyber-fizyczne systemy produkcyjne wywierają ogromny wpływ na siłę roboczą, a zwłaszcza na techników i inżynierów. Systemy te wymagają nowych hybrydowych zespołów "człowiek – maszyna", w których technicy i inżynierowie powinni umieć analizować zbiory danych Big Data, tworzyć symulacje...
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Kalibracja i walidacja metody Mathara za pomocą Metody Elementów Skończonych
PublicationMetoda pomiaru naprężeń powierzchniowych przy pomocy rozet tensometrycznych i kontrolowanych odwiertów (metoda otworkowa) jest stosowana powszechnie w odniesieniu do stali izotropowych oraz silnie anizotropowych laminatów, natomiast nie została rozpoznana jej stosowalność do umiarkowanie anizotropowych stopów metali. W artykule opisane jest odniesienie wyników pomiarów wykonanych na płytach ze stali duplex do modelu numerycznego...
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Pose-Configurable Generic Tracking of Elongated Objects
PublicationElongated objects have various shapes and can shift, rotate, change scale, and be rigid or deform by flexing, articulating, and vibrating, with examples as varied as a glass bottle, a robotic arm, a surgical suture, a finger pair, a tram, and a guitar string. This generally makes tracking of poses of elongated objects very challenging. We describe a unified, configurable framework for tracking the pose of elongated objects, which...
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BEZOLEJOWE UKŁADY CHŁODNICZO KLIMATYZACYJNE
PublicationWiele z nowo wprowadzanych rozporządzeń Unii Europejskiej wymuszać będzie na producentach wprowadzanie instalacji bardziej energooszczędnych i „ekologicznych”. Wprowadzane aktualnie do użytku czynniki robocze, mają być nie tylko przyjazne środowisku, ale dodatkowo zapewnić wysoką sprawność obiegów chłodniczych tak aby obniżyć ich długoterminowy wpływ na środowisko. Naturalną tendencją są więc próby podwyższania ich sprawności,...
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Katedra Systemów Decyzyjnych
PublicationKatedra Systemów Decyzyjnych została utworzona w roku 2006 jako dydaktyczno-naukowa jednostka organizacyjna Wydziału Elektroniki, Telekomunikacji i Informatyki (ETI) przez prof. dr. hab. inż. Zdzisława Kowalczuka. Kadra, pochodząca głównie z Katedry Systemów Automatyki, swoimi dokonaniami wpisuje się w bogatą, ponad 40-letnią tradycję Wydziału, związaną, z automatyką i teorią sterowania, której podwaliny tworzył prof. Jerzy Seidler,...
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ANALIZA PARAMETRÓW PRZEPŁYWOWYCH PRZEZ STOPNIE TURBIN PAROWYCH
PublicationTurbina w obiegach cieplnych pracuje w zmienionych warunkach. Dodatkowo zmianie ulegają strumienie mas czynnika roboczego z powodu chłodzenia (w turbinach gazowych) lub poboru pary do układu regeneracji ciepła (w turbinach parowych). Te dopływy i pobory również zależą od obciążenia turbozespołu. Stąd w obliczeniach numerycznych wieńców wirnikowych dla wyznaczenia stanów referencyjnych, podobnie jak dla turbin gazowych, trzeba uwzględnić...
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On the Usefulness of the Generalised Additive Model for Mean Path Loss Estimation in Body Area Networks
PublicationIn this article, the usefulness of the Generalised Additive Model for mean path loss estimation in Body Area Networks is investigated. The research concerns a narrow-band indoor off-body network operating at 2.45 GHz, being based on measurements performed with four different users. The mean path loss is modelled as a sum of four components that depend on path length, antenna orientation angle, absolute difference between transmitting...
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Uptake, accumulation, and translocation of Zn, Cu, Pb, Cd, Ni, and Cr by P. australis seedlings in an urban dredged sediment mesocosm: impact of seedling origin and initial trace metal content
PublicationThe study presents results from 6 months of phytoremediation of sediments dredged from three urban retention tanks carried out in a mesocosm setup with the use of P. australis. Two kinds of P. australis seedlings were considered: seedlings originating from natural (uncontaminated - Suncont) and anthropogenically changed environments (contaminated – Scont); this distinction was reflected in the baseline concentrations of trace metals...
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G2DC-PL+: a gridded 2 km daily climate dataset for the union of the Polish territory and the Vistula and Odra basins
PublicationG2DC-PL+, a gridded 2 km daily climate dataset for the union of the Polish territory and the Vistula and Odra basins, is an update and extension of the CHASE-PL Forcing Data – Gridded Daily Precipitation and Temperature Dataset – 5 km (CPLFD-GDPT5). The latter was the first publicly available, high-resolution climate forcing dataset in Poland, used for a range of purposes including hydrological modelling and bias correction of...
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Heavy metal accumulation and distribution in Phragmites australis seedlings tissues originating from natural and urban catchment
PublicationThe retention of heavy metal (HM) was studied in root and rhizomes (BLG), stems (ST), and leaves (LF) of Phragmites australis (common reed) seedlings collected from different locations, differing in the scale of anthropogenic interference. The analysis includes the reference samples of sediments in uncontaminated lake Garczonki and contaminated roadside ditch in Cieplewo. The concentrations of Zn, Cu, Pb, Cd, Ni, and Cr were analyzed...
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Route vertical alignment design in the process of its regulation
PublicationRegulacja toru kolejowego ma za zadanie dostosowanie niewłaściwego lub też zdeformowanego położenia osi toru do położenia odpowiadającego parametrom technicznym wymaganym dla danej linii kolejowej. Projekt regulacji wykonywany jest na podstawie pomiaru geodezyjnego wysokości toków szynowych metodą punktów stałych, tzn. w oparciu o umieszczone na słupach wskaźniki regulacji osi toru, których wysokość jest znana. Wykonany w ten sposób...
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Hidden Tensor Structures
PublicationAny single system whose space of states is given by a separable Hilbert space is automatically equipped with infinitely many hidden tensor-like structures. This includes all quantum mechanical systems as well as classical field theories and classical signal analysis. Accordingly, systems as simple as a single one-dimensional harmonic oscillator, an infinite potential well, or a classical finite-amplitude signal of finite duration...
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Thermal utilization of meat-and-bone meal using the rotary kiln pyrolyzer and the fluidized bed boiler – The performance of pilot-scale installation
PublicationThermal utilization of meat-and-bone meal (MBM) is subject to stringent regulations that are meant to provide elimination of any potential pathogens. Incineration as well as other possible routes for thermal conversion of MBM are still at the research state. The universal technology was developed that allows to combust various types of waste organic materials, including animal waste, municipal solid waste and sludge, mixed at any...
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XXXII AUKCJA WIELKIEGO SERCA
PublicationXXXII Aukcji Wielkiego Serca na rzecz Specjalnego Ośrodka Szkolno-Wychowawczego nr 1 im. Jana Matejki – jednej z najstarszych placówek kształcącej młodzież o specjalnych potrzebach edukacyjnych w Krakowie. Obecny rok szkolny to już 77. rok istnienia ośrodka. Organizowana pod patronatem BCC aukcja to wyjątkowa okazja dla miłośników i kolekcjonerów polskiej sztuki współczesnej. Kolejny raz będzie można obcować z dziełami artystów,...
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Eksperymentalna weryfikacja procedury szacowania wytrzymałości młodego betonu wg normy ASTM C1074
PublicationW referacie przedstawiono metodę służącą oszacowaniu wytrzymałości betonu w trakcie procesu dojrzewania (ang. Maturity Method) bazującą na procedurze określonej zgodnie z amerykańską normą, która uwzględnia wpływ połączonych efektów temperatury i czasu na rozwój wytrzymałości betonu. Standardy ASTM C1074 zostały opracowane przez NBS (ang. National Bureau of Standards) z uwagi na powtarzające się wypadki na palcu budowy wynikające...
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Proportional-Derivative and Model-Based Controllers for Control of a Variable Mass Manipulator
PublicationIn the paper, numerical analysis of dynamics of a variable mass manipulator is presented. A revolute joints composed manipulator is considered. Payload of the gripper is considered as the only element characterized by unknown value of its mass (variable between subsequent operations). As in other cases of the revolute joints composed manipulators, its behaviour dependents significantly on the pose of the manipulator. When the manipulator...
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Comparison of the Effectiveness of Health Systems in The European Countries-Two-Stage DEA Model
PublicationThis article compares the efficiency of health systems in selected European countries using two-stage data envelopment analysis (DEA), based on data from the EUROSTAT database. In the first step, DEA efficiency scores were calculated for health care systems and, subsequently, the external variables describing lifestyle were used to calculate the truncated regression. Health care resources (physicians, nurses, hospital beds, financial...
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Fracture surface topography investigation and fatigue life assessment of notched austenitic steel specimens
PublicationThe objectives of this study were to investigate the fracture surface topography of X8CrNiS18-9 austenitic stainless-steel specimens for different loadings and notch radii and to supplement the knowledge about the fracture mechanisms for fatigue performance. Cases with three different values of the notch radius ρ and the stress amplitude σa were analysed. The fracture topographies were quantified by the areas over their entire...
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An Empirical System Loss Model for Body Area Networks in a Passenger Ferry Environment
PublicationThis paper presents a general empirical system loss model for estimating propagation loss in Body Area Networks in off-body communications at 2.45 GHz in a passenger ferry environment. The model is based on measurements, which were carried out in dynamic scenarios in the discotheque passenger ferry environment. The model consists of three components: mean system loss, attenuation resulting from the variable antenna position on...
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Optimization of the spindle speed during milling of large-sized structures with the use of technique of Experiment-Aided Virtual Prototyping
PublicationIn the paper are presented considerations concerning vibration suppression problems during milling of large-sized workpieces with the use of innovative method of matching the spindle speed of cutting tool. It depends on repeatable change of the spindle speed value as soon as the optimal vibration state of the workpiece approaches. The values of dominant “peaks” in the frequency spectra and the Root Mean Square (RMS) values of time...
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A method of predicting the best conditions for large-size workpiece clamping to reduce vibration in the face milling process
PublicationThe paper presents an innovative method of solving the problem of vibration suppression during milling of large-size details. It consists in searching for the best conditions for clamping the workpiece based on a rapid modal identification of the dominant natural frequencies only and requires repetitive changes in the tightening torque of the clamping screws. Then, by estimating the minimum work of the cutting forces acting in...
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An Empirical System Loss Model for Body Area Networks in a Passenger Ferry Environment
PublicationThis paper presents a general empirical system loss model for estimating propagation loss in Body Area Networks in off-body communications at 2.45 GHz in a passenger ferry environment. The model is based on measurements, which were carried out in dynamic scenarios in the discotheque passenger ferry environment. The model consists of three components: mean system loss, attenuation resulting from the variable antenna position on...
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Numerical Model of the Aortic Valve Implanted Within Real Human Aorta
PublicationCardiovascular system diseases are the main cause of deaths in developed and developing countries. The main reasons are myocardial infarction, heart failure, stroke and valvular diseases. These are caused mainly by arteriosclerosis. The valvular diseases involve a significant burden for the health care system and their frequency is rising with the patient age. This work describes the tools and numerical models appropriate for modeling...
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Fault diagnosing system of wheeled tractors
PublicationA defect of complex wheeled tractor assembles most frequently negative influence on exploitation efficiency, safety and exhaust gases emission. Structure complexity of wheeled tractors requires more and more advanced diagnostic methods for identification of their serviceable possibilities as well in manufacturing step as in exploitation. In classical diagnosing methods of wheeled tractor defects states mapping by measured diagnostic...
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Polscy Elektrycy w Obozie Uniwersyteckim Winterthur w Szwajcarii w latach 1940-1945
PublicationArtykuł przedstawia okoliczności internowania polskich żołnierzy 2. Dywizji Strzelców Pieszych Armii Polskiej, która walczyła w kampanii francuskiej i w czerwcu 1940 została internowana w neutralnej Szwajcarii oraz historię Obozu Uniwersyteckiego Winterthur. Dowództwo 2DSP podjęło działania mające na celu umożliwienie polskim żołnierzom kontynuację przerwanej nauki oraz studia na szwajcarskich uczelniach. Decyzją władz szwajcarskich...
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Pilot installation for thermal utilization of meat-and-bone meal using the rotary kiln pyrolyzer and the fluidised bed boiler
PublicationThe technology of thermal utilization of meat-and-bone meal (MBM) is still at the research state. However, there are already a number of existing pilot-scale installations that provide the complete, effective and environmentally safe process conducting. The universal technology was developed that allows to combust various types of waste, including animal waste, municipal waste and sludge, mixed at any ratio with different types...
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Survey on fuzzy logic methods in control systems of electromechanical plants
PublicationРассмотрены алгоритмы управления электромеханическими системами с использованием теории нечеткой логики, приводятся основные положения их синтеза, рассматриваются методы анализа их устойчивости на основе нечетких функций Ляпунова. Эти алгоритмы чаще всего реализуются в виде различных регуляторов, применение которых целесообразно в системах, математическая модель которых не известна, не детерминирована или является строго нелинейной,...
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Analiza egzergetyczna bloku gazowo parowego współpracującego z obiegiem ORC
PublicationW pracy przedstawiono sposób przeprowadzania bilansu egzergetycznego dla obiegu Clausiusa – Rankina. Następnie przy pomocy programu EES współpracującego z bazą REFPROP 9.0 (Reference Fluid Thermodynamic and Transport Properties Database) [6] wykonany został bilans egzergetyczny dla układu kaskadowego siłowni CCGT – ORC, w którym blok gazowo – parowy współpracuje z obiegiem ORC. Obliczenia wykonano w oparciu o rzeczywiste parametry...
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NLP Questions Answering Using DBpedia and YAGO
PublicationIn this paper, we present results of employing DBpedia and YAGO as lexical databases for answering questions formulated in the natural language. The proposed solution has been evaluated for answering class 1 and class 2 questions (out of 5 classes defined by Moldovan for TREC conference). Our method uses dependency trees generated from the user query. The trees are browsed for paths leading from the root of the tree to the question...
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The clamping selection method to reduce the vibration of large-size workpieces during the face milling process
PublicationThe article introduces a method for selecting the best clamping conditions to obtain vibration reduction during milling of large-size workpiece. It is based on experimental modal analysis performed for a set of assumed, fixing conditions of a considered workpiece to identify Frequency Response Functions (FRFs) for each tightening torque of the mounting screws. Simulated plots of periodically changing nominal cutting forces are...
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The elasto-plastic numerical study of crack initiation in notched PMMA specimens under uniaxial loading conditions – Tension and torsion
PublicationThis paper presents the results of FEM numerical calculations aimed at describing the plastic strain and stress fields under critical loading conditions: tensile force or torsional moment. The calculations were carried out with reference to the results of experimental tensile and torsional tests of flat PMMA specimens weakened with V-notches of different root radii: 0.5, 2 and 10 mm. The procedure for conducting nonlinear numerical...
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Detection of debonding in adhesive joints using Lamb wave propagation
PublicationAdhesively bonded joints are widely used in many branches of industry. Mechanical degradation of this type of connections does not have significant symptoms that can be noticed during visual assessment, so non-destructive testing becomes a very important issue. The paper deals with experimental investigations of adhesively bonded steel plates with different defects. Five samples (an intact one and four with damages in the form...
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DBpedia and YAGO Based System for Answering Questions in Natural Language
PublicationIn this paper we propose a method for answering class 1 and class 2 questions (out of 5 classes defined by Moldovan for TREC conference) based on DBpedia and YAGO. Our method is based on generating dependency trees for the query. In the dependency tree we look for paths leading from the root to the named entity of interest. These paths (referenced further as fibers) are candidates for representation of actual user intention. The...
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FEM modelling of stress and strain distribution in weld joints of steel sandwich panels
PublicationThe development of laser welding technology has enabled the mass production of thin-walled structures, including steel sandwich panels. The technology of joining plating panels with stiffeners by welding allows us to create joints with a specific geometry and material properties. In comparison with other types of joints, laser welds are characterized by their specific behaviour under cyclic load and, as a consequence, a different...
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Lamb wave-based monitoring of shear failure of an adhesive lap joint
PublicationThe paper presents a study on the elastic wave propagation in adhesive joints of steel plates subjected to tensile loading. A single lap joint was chosen for analysis because of its simplicity and plurality of applications. Experimental investigations consisted of the uniaxial extension of prepared specimens. Force and displacement values were recorded by a testing machine. Simultaneously, guided Lamb waves were excited and signals...
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Performance Evaluation of GAM in Off-Body Path Loss Modelling for Body Area Networks
PublicationThis paper addresses the performance evaluation of an off-body path loss model, based on measurements at 2.45 GHz, which has been developed with the use of the Generalised Additive Model, allowing to model a non-linear dependence on different predictor variables. The model formulates path loss as a function of distance, antennas’ heights, antenna orientation angle and polarisation, results showing that performance is very sensitive...
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EVALUATION OF THE SEMIVARIOGRAM SELECTION ON THE KRIGING INTERPOLATION
PublicationThe aim of the paper is to present the possibilities of geostatistical interpolation kriging method using in the process of generating digital terrain models (DTM). The source of data is a direct measurements realized with a precision GNSS positioning kinematic measurement technique RTN. Kriging algorithm was analysed, especially in the meaning of a semivariogram every step. Theoretical semivariogram selection influence on the...
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POSSIBILITY OF IDENTIFICATION OF TECHNICAL CONDITION OF BEARINGS FOR SELF-IGNITION ENGINES BY APPLICATION OF ACOUSTIC EMISSION AS A DIAGNOSTIC SIGNAL
PublicationThis paper presents the results of empirical studies where the acoustic emission (AE) method was applied to identify the technical condition of sliding surfaces of main and crank bearings for main diesel engines. The test results indicate that the measurements of the AE parameters allow the technical condition identification for bearings of this type. The results refer to the measurements of the parameters for AE generated in the...
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Determination of Odour Interactions of Three-Component Gas Mixtures Using an Electronic Nose
PublicationThe paper presents an application of an electronic nose prototype comprised of six TGS-type sensors and one PID-type sensor to identify odour interaction phenomena in odorous three-component mixtures. The investigation encompassed eight odorous mixtures—toluene-acetone-triethylamine and formaldehyde-butyric acid-pinene — characterized by different odour intensity and hedonic tone. A principal component regression (PCR) calibration...
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Fractographic-fractal dimension correlation with crack initiation and fatigue life for notched aluminium alloys under bending load
PublicationIn this study, fatigue fracture surfaces of aluminium alloy 2017-T4 notched specimens were investigated under cyclic bending to find an alternative failure loading index.. The surface topographies were measured on the entire fracture area with an optical profilometer for different loading conditions. Fatigue crack initiation life Ni and total fatigue life Nf were examined using standard surface topography parameters (such as, root...
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XXXI Aukcja Wielkiego Serca
PublicationPrace artystów, które będzie można licytować podczas XXXI Aukcji Wielkiego Serca, od 15 do 26 listopada przezentowane są w Muzeum Inżynierii Miejskiej (wystawa czynna w godz. 12.00–19.00). Sama aukcja odbędzie się 26 listopada. ‒ Dzięki funduszom uzyskanym poprzez aukcję realizowany jest program wyjazdów terapeutyczno-rehabilitacyjnych. Podczas takich wyjazdów niektórzy nasi podopieczni po raz pierwszy w życiu widzieli morze...
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Identification of Parameters Influencing the Accuracy of the Solution of the Nonlinear Muskingum Equation
PublicationTwo nonlinear versions of the Muskingum equation are considered. The difference between both equations relates to the exponent parameter. In the first version, commonly used in hydrology, this parameter is considered as free, while in the second version, it takes a value resulting from the kinematic wave theory. Consequently, the first version of the equation is dimensionally inconsistent, whereas the proposed second one is consistent. It...
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Core–shell excitation of isoxazole at the C, N, and O K-edges – an experimental NEXAFS and theoretical TD-DFT study
PublicationThe near-edge X-ray absorption fine structure (NEXAFS) spectra of the gas-phase isoxazole molecule have been measured by collecting total ion yields at the C, N, and O K-edges. The spectral structures have been interpreted using time-dependent density functional theory (TD-DFT) with the short-range corrected SRC2-BLYP exchange–correlation functional. Experimental and calculated energies of core excitations are generally in good...
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Identyfikacja ryzyka zakłóceń logistycznych podczas planowania procesu inwestycyjnego na wybranym przykładzie
PublicationDziałania logistyczne w budownictwie obejmują przede wszystkim przepływ informacji, lokalizację zakładów produkcyjnych i magazynów na placu budowy, transport i składowanie materiałów budowlanych, realizowanie zamówień, procesy zaopatrzeniowe, kontrolę zapasów, czynności reparacyjne i zaopatrywanie w części maszyn budowlanych. Zdarzenia losowe, które mogą zaistnieć i przerwać bądź przedłużyć wyżej wymienione prace nie są łatwe do...
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Incremental construction of Minimal Tree Automata [online]
PublicationWe describe an algorithm that allows the incremental addition or removal of unranked ordered trees to minimal frontier-to-root deterministic tree automaton (DTA). The algorithm takes a tree t and a minimal DTA A as input; it outputs a minimal DTA A' which accepts the language L(A) accepted by A incremented (or decremented) with the tree t. The algorithm can be used to efficiently maintain dictionaries which store large collections...