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Search results for: model autoregresyjny
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Supervised Model Reference Adaptive Control of Chlorine Residuals in Water Distribution Systems
PublicationControl of integrated quality and quantity in Drinking Water Distribution Systems within recently proposed hierarchical framework is considered in the paper. A supervised nonlinear Indirect Model Reference Adaptive Controller is derived for the lower control level of the control structure to operate as the fast feedback controller of chlorine residuals in the monitored nodes. The major supervisor role is to manage switching between...
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Regenerative Drug Discovery Using Ear Pinna Punch Wound Model in Mice
PublicationThe ear pinna is a complex tissue consisting of the dermis, cartilage, muscles, vessels, and nerves. Ear pinna healing is a model of regeneration in mammals. In some mammals, including rabbits, punch wounds in the ear pinna close spontaneously; in common-use laboratory mice, they remain for life. Agents inducing ear pinna healing are potential regenerative drugs. We tested the effects of selected bioactive agents on 2 mm ear pinna...
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Simulations of the Derecho Event in Poland of 11th August 2017 Using WRF Model
PublicationThis series contains datasets related to the forecasting of a severe weather event, a derecho, in Poland on 11 August 2017. The simulations were conducted using the Weather Research and Forecasting (WRF) model version 4.2.1 with different initial and boundary conditions of the pressure and model levels derived from 5 global models: Global Forecast System (GFS), Global Data Assimilation System (GDAS), European Centre for Medium-Range...
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On dynamic modeling of piezomagnetic/flexomagnetic microstructures based on Lord–Shulman thermoelastic model
PublicationWe study a time-dependent thermoelastic coupling within free vibrations of piezomagnetic (PM) microbeams considering the flexomagnetic (FM) phenomenon. The flexomagneticity relates to a magnetic field with a gradient of strains. Here, we use the generalized thermoelasticity theory of Lord–Shulman to analyze the interaction between elastic deformation and thermal conductivity. The uniform magnetic field is permeated in line with...
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Model zarządzania projektami informatycznymi w jednostkach sądownictwa powszechnego w Polsce
PublicationProjekty mają istotny wpływ na funkcjonowanie sądów powszechnych. Przyjrzenie się projektom informatycznym realizowanym w sądach wraz z raportem Najwyższej Izby Kontroli dot. sprawności realizowanych projektów informatycznych wymiaru sprawiedliwości doprowadziło do zidentyfikowania głównych problemów podczas realizacji inicjatyw informatycznych. Ponadto przegląd literatury dotyczący zarządzania projektami dla wymiaru sprawiedliwości...
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Application of a stochastic compartmental model to approach the spread of environmental events with climatic bias
PublicationWildfires have significant impacts on both environment and economy, so understanding their behaviour is crucial for the planning and allocation of firefighting resources. Since forest fire management is of great concern, there has been an increasing demand for computationally efficient and accurate prediction models. In order to address this challenge, this work proposes applying a parameterised stochastic model to study the propagation...
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Melanoma skin cancer detection using mask-RCNN with modified GRU model
PublicationIntroduction: Melanoma Skin Cancer (MSC) is a type of cancer in the human body; therefore, early disease diagnosis is essential for reducing the mortality rate. However, dermoscopic image analysis poses challenges due to factors such as color illumination, light reflections, and the varying sizes and shapes of lesions. To overcome these challenges, an automated framework is proposed in this manuscript. Methods: Initially, dermoscopic...
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Analyzing Preconditions to Introduce Internet Voting in Portugal: Insights from the Estonian Model
PublicationInternet voting has been trialed or introduced for several countries, including Norway, Portugal, United States, United Kingdom and Switzerland as an additional voting channel to increase voter turnout and, also to modernize the electoral process. However, only Estonia has successful introduced internet voting, deploying e-enabled elections in general governmental levels. This paper aims to provide an exploratory study on the Estonian...
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Model tests of cast-in-place piles formed by using different types of auger
PublicationModel tests are still a popular research tool used to observe and determine the mechanisms of pile-soil interaction. Due to the significant scale effect, the results of model tests performed in the 1g system can only be analysed from the qualitative side. This article describes and presents the results of 1g pile model tests carried out for comparative purposes. There were tested the effectiveness and efficiency of various types...
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Study of Soil Temperature and Moisture Changes in a Physical Model of an Underground Cable Line
PublicationThe ampacity of power cables is highly dependent on the thermal resistivity of the soil in which they are laid. The lower it is, the higher this ampacity. The thermal resistivity of the soil decreases as its moisture increases. Therefore, it is preferable that the soil around the cables has high moisture. Unfortunately, the heat generated in heavily loaded cables causes the migration of moisture from the surrounding soil, which...
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Data-driven, probabilistic model for attainable speed for ships approaching Gdańsk harbour
PublicationThe growing demand for maritime transportation leads to increased traffic in ports. From this arises the need to observe the consequences of the specific speed ships reach when approaching seaports. However, usually the analyzed cases refer only to the statistical evaluation of the studied phenomenon or to the empirical modelling, ignoring the mutual influence of variables such as ship type, length or weather conditions. In this...
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Linear viscoelastic transversely isotropic model based on the spectral decomposition of elasticity tensors
PublicationThe linear viscoelasticity is still a useful model in the engineering for studying the behavior of materials loaded with different loading rates (frequencies). Certain types of materials reveal also an anisotropic behavior: fiber reinforced composites, asphalt concrete mixtures, or wood, to name a few. In general, researchers try to identify experimentally the dependence of engineering constants like: directional Young’s moduli...
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Optimized Computational Intelligence Model for Estimating the Flexural Behavior of Composite Shear Walls
PublicationThis article presents a novel approach to estimate the flexural capacity of reinforced concrete-filled composite plate shear walls using an optimized computational intelligence model. The proposed model was developed and validated based on 47 laboratory data points and the Transit Search (TS) optimization algorithm. Using 80% of the experimental dataset, the optimized model was selected by determining the unknown coefficients of...
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Experimental determination of dynamic properties of cylindrical steel tank model filled with liquid
PublicationIn technical branches, such as chemical or petroleum industries, cylindrical steel tanks are essential structures used for storage of liquid products. Any failure might have disastrous consequences, therefore their safety and reliability is essential. The aim of the present paper is to show the results of the experimental study which has been conducted on a scaled model of a real tank used in Poland. The investigation was carried...
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Macro-elements and Model Order Reduction for Efficient Three-Dimensional FEM Analysis
PublicationAn efficient model order reduction (MOR) methodology for three dimensional vector finite element method (FEM) is developed to accelerate simulations of the structures containing features that cause strong variations of mesh density. As the result of presented algorithm, FEM subsystems of equations corresponding to the selected refined region are converted into a very compact sets of linear equations, called macro-elements.Numerical...
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The model of end-to-end call setup time calculation for Session Initiation Protocol
PublicationEnd-to-end call setup delay is one of the most important grade of service (GoS) parameters for VoIP networks with Session Initiation Protocol (SIP). A typical subscriber wants to have a connection established as soon as possible. From the operator's perspective call setup time is also crucial because he needs to know how probability of successful packet transmission on SIP links is related to a call setup delay. Then he can make...
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Traffic model for evaluation of call processing performance parameters in IMS-based NGN
PublicationIn the modern world requirements for accurate and fast information distribution are becoming more and more important, which creates a strong necessity for appropriate telecommunication network architecture. Proposition of such an architecture is the Next Generation Network (NGN) concept, which in order to guarantee Quality of Service (QoS), should be correctly designed and dimensioned. For this reason proper traffic models must...
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Influence of landfill leachate on municipal wastewater treatment - model plant(WWTP-MP)
PublicationAbstract In the current study, wastewater treatment model plant (WWTP-MP) was used to investigate the possibilities of landfill leachate co-treatment together with municipal wastewater. The WWT-MP, designed as an A2O multiphase system, was fed with the raw municipal wastewater (from the WWTP Gdańsk "Wschód'', Qav.=82x103 m3/d) with increasing, from 1 to 5 % (vol.), quantity of landfill leachate (collected from Gdańsk landfill ''Szadółki")....
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Passing from requirements specification to class model using application domain ontology
PublicationThe quality of a classic software engineering process depends on the completeness of project documents and on the inter-phase consistency. In this paper, a method for passing from the requirement specification to the class model is proposed. First, a developer browses the text of the requirements, extracts the word sequences, and places them as terms into the glossary. Next, the internal ontology logic for the glossary needs to...
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Usługa oraz model dekompozycji - teoretyczne podstawy usługowego zarządzania organizacją wsparcia IT
PublicationRozdział omawia fundamentalne dla usługowego modelu zarządzania organizacją IT pojęcie usługi. Opisuje podstawowe typy jej atrybutów oraz wprowadza funkcję wyróżniającą wykorzystaną do kategoryzacji usług. W dalszej części ukazany jest ogólny model dekompozycji usługi i jego wersję bazującą na ograniczeniach implementacji modelu w CMDB. Publikacja podsumowuje otrzymane wyniki i wskazuje dalsze kierunki badań dotyczące w szczególności...
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Diversity of fecal coliforms and their antimicrobial resistance patterns in wastewater treatment model plant.
PublicationThe occurrence of resistance patterns among wastewater fecal coliforms was determined in the study. Susceptibility of the isolates was tested against 19 antimicrobial agents: aminoglycosides, aztreonam, carbapenems, cephalosporines, b-lactam/b-lactamase inhibitors, penicillines, tetracycline, trimethoprim/sulfamethoxazole, and fluoroquinolones. Additionally the removal of resistant isolates was evaluated in the laboratory-scale...
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Atimicrobial Resistance of Enterococcus spp. in Muncipal wasterwater Treatment Plant - Model Study
PublicationIn this study the removal of resistant Enterococcus spp. was evaluated using the laboratory-scale wastewater treatment model plant (M-WWTP), designed as a multiphase (anaerobic, anoxic and aerobic) system (Q = 27 dm3 per day) and continuously supplied with the wastewater obtained from the full-scale WWTP, after grid. The activated sludge from the secondary clarifier was recirculated to the anaerobic chamber (with the ratio equal...
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Model Pozyskiwania i Przetwarzania Wiedzy w Zarządzaniu Organizacją Uczącą się
PublicationW pracy podjęto tematykę rozwoju organizacji uczących się. Jako, że teoria organizacji uczącej nie daje mierników ani narzędzi do badania jej rozwoju autor podejmuje badania w tym zakresie w oparciu o znajomość organizacji informatycznych i istniejących w branży IT formalnych standardów oceny organizacji. Proponuje adaptację istniejących standardów oceny dojrzałości organizacji IT dla potrzeb pomiaru rozwoju organizacji uczących....
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Simulation model for evaluation of packet sequence changed order of stream in DiffServ network
PublicationCurrent packet networks use a large variety of mechanisms which should support QoS (Quality of Service). One of those mechanisms is routing (calculating connection paths for incoming service requests). The most effective mechanism in QoS context is dynamic routing, which is based on the current network state described by the offered traffic matrix and link states. After switching between calculated available paths, connection...
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Using trust management model for detection of faulty nodes in Wireless Sensor Networks
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Wieloatrybutowy model decyzyjny w polityce remontowej technicznych systemów infrastruktury komunalnej
PublicationReferat dotyczy rozmytego rozwinięcia metody porównań parami, stosowanej do szeregowania skończonej liczby wariantów decyzyjnych, atrybutów lub kryteriów w wielokryterialnym grupowym podejmowaniu decyzji. Zaproponowane podejście może być wykorzystane, gdy ekspert wyraża swoje preferencje zarówno w formie oceny rozmytej, jak i ostrej. Metoda rozwiązania problemu opiera się na rozmytym rozwinięciu układu równań normalnych, stosowanych...
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Theoretical and experimental assessment of parameters for the non-linear viscoelastic model of structural pounding
PublicationZjawisko zderzeń pomiędzy sąsiednimi konstrukcjami budowlanymi podczas trzęsień ziemi jest w ostatnim czasie intensywnie badane z wykorzystaniem różnych modeli numerycznych siły zderzenia w czasie kontaktu. Wyniki badań eksperymentalnych pokazują, iż nieliniowy model lepko-sprężysty jest najdokładniejszy wśród modeli stosowanych do analizy. Model ten zdefiniowany jest poprzez dwa parametry: liczbę tłumienia zderzenia oraz parametr...
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Parametryczny detektor zakłóceń impulsowych sygnałów fonicznych wykorzystujący ukryty model Markowa
PublicationW pracy omówiono problemy wykrywania zakłóceń impulsowych w sygnałach fonicznych. Scharakteryzowano metodę detekcji progowej opartej o modelowanie sygnałów. Przedstawiono algorytm wykrywania zakłóceń impulsowych wykorzystujący ukryty model Markowa czasu dyskretnego, analizujący wstępnie wybielony sygnał foniczny.
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Model tests and stability calculations of shallow foundations resting on non-cohesive subsoil
PublicationPrzedstawiono metodykę i charakterystyczne wyniki własnych badań modelowych przeprowadzonych z wykorzystaniem techniki PIV. W analizach numerycznych przeanalizowano trzy kryteria wytrzymałości gruntu na ścinanie i ich wpływ na wyniki ilościowe i jakościowe. Obliczenia analityczne oparto na koncepcji ESE. Zestawiono i przeanalizowano zgodność wyników badań modelowych, analiz numerycznych i obliczeń analitycznych.
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A model for performance assessment of damaged ships when using the risk-based method
PublicationW pracy omówiono metody oceny bezpieczeństwa statków w stanie uszkodzonym w warunkach operacyjnych. Przedstawiono metodę oceny bezpieczeństwa statków w stanie uszkodzonym opartą na analizie ryzyka. Przedstawiono model oceny zachowania się statku w stanie uszkodzonym, który jest oparty na tak zwanym quasi-dynamicznym modelu zatapiania statku. Omówiono elementy związane z analizą ryzyka i ocena bezpieczenstwa statków.
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Road noise mapping in the city area: measurements compared to model-based estimations
PublicationThe paper presents an approach to the verification of noise prediction models in selected localization in the city of Gdansk. The experiments described include a comparison between environmentalmeasurement results performed in the terrain and the noise level prediction results. The NMPB-96 (Nouvelle Méthode de Prévision du Bruit) and Harmonoise models outcomes provide the subject ofthe analysis. The proposed solution of continuous...
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Identification and validation of material parameters for isotropic damage model in viscoplastic flow conditions
PublicationW pracy przedstawiono trzy różne sposóby identyfikacji parametrów materiałowych dla izotropowego modelu zniszczenia w warunkach płynięcia lepkoplastycznego. W celu ustalenia który sposób daje najlepsze rezultaty przeprowadzono każdą z identyfikacji dla wybranego materiału, a następnie dokonano ich oceny porównując wyniki symulacji numerycznych z wynikami eksperymentów. W pracy pokazano również praktyczne zastosowanie modelu - przykład...
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Bayesian multilevel model of micro RNA levels in ovarian-cancer and healthy subjects
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Tree-based homogeneous ensemble model with feature selection for diabetic retinopathy prediction
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<title>Cavity control system model simulations for the TESLA linear accelerator</title>
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Determinants of the European Union’s Trade - evidence from a panel estimation of the gravity model
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How to model temporal changes in nontargeted metabolomics study? A Bayesian multilevel perspective
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THE TIMING OF INITIAL PUBLIC OFFERINGS – NON-NUMERICAL MODEL BASED ON QUALITATIVE TRENDS
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Towards the development of a system-theoretic model for safety assessment of autonomous merchant vessels
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Toward a unified model of mobile Business Intelligence (m-BI) acceptance and use
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Perceived supervisor support as a relevant factor for subordinates’ job satisfaction – model verification
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Comparative Analysis of CpG Sites and Islands Distributed in Mitochondrial DNA of Model Organisms
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Finding safe and efficient shipping routes in ice-covered waters: A framework and a model
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Toward a hybrid model of ship performance in ice suitable for route planning purpose
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Ważone umieszczanie grafów jako model optymalizacji komunikacji w sieciach heterogenicznych
PublicationUmieszczenie grafu w grafie jest odwzorowaniem pomiędzy parą grafów. Graf umieszczany reprezentuje sieć komunikujących się ze sobą zadań, natomiast graf docelowy dostępną architekturę wykonania tych zadań. Problem polega na takim odwzorowaniu wierzchołków i krawędzi, aby zminimalizować koszty wynikające z potrzeby użycia zastępczych ścieżek w grafie docelowym. W klasycznym modelu przyjmuje się, że oba grafy są proste i ich krawędzie...
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Quality model for UML tools in application to UML tool selection and market analysis
PublicationJęzyki modelowania i wspierające je narzędzia odgrywają istotną rolę w procesie wytwarzania i utrzymania oprogramowania. Wraz ze wzrostem liczby narzędzi UML na rynku pojawia się potrzeba ich porównania i oceny. Artykuł prezentuje wielowymiarowy model oceny narzędzi UML, opisuje ankietę przydatną do oceny narzędzi UML oraz przedstawia system oceny narzędzi UML wraz ze studium przypadku jego zastosowania do poszukiwania narzędzi...
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Nonlinear model of a synchronous generator for analysis of more electric aircraft power systems
PublicationA nonlinear model for studying a variable-speed synchronous generator (SG) in more electric aircraft (MEA) power system has been developed. The saturation effects of the SG magnetic circuit have been considered. The model has been implemented in the Synopys/Saber simulation environment. The modelling language MAST has been used to elaborate the SG model. The model exhibit a network with the same number of external terminals/ports...
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Multi split functional model of geodetic observations in deformation analyses of the Olsztyn castle
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The spectral finite element model for analysis of flexural–shear coupled wave propagation
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Noise spectral density computation based on finite element model of piezoceramic sensor
PublicationThe high sensitivity with wide bandwidth is required for sensor applications in non-destructive testing (NDT). The sensitivity of piezoceramic sensors demands to minimize their noise especially thermal noise, polarisation noise and low frequency 1/f noise,which are the main sources of voltage or current fluctuation in this sort of sensors. For simplicity, only the piezoceramic part of sensor was under study. the theoretical and...