2016 - Repozytorium publikacji - Politechnika Gdańska

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Model of the double-rotor induction motor in terms of electromagnetic differential
- Dominik Adamczyk
- Andrzej Wilk
- Michał Michna
2016 Pełny tekst Archives of Electrical Engineering
The paper presents a concept, a construction, a circuit model and experimental results of the double-rotor induction motor. This type of a motor is to be implemented in the concept of the electromagnetic differential. At the same time it should fulfill the function of differential mechanism and the vehicle drive. One of the motor shafts is coupled to the direction changing mechanical transmission. The windings of the external rotor are powered by slip rings and brushes. The inner rotor has the squirrel-cage windings. The circuit model parameters were calculated based on the 7.5 kW real single-rotor induction motor (2p = 4). Experimental verification of the model was based on comparison between the mentioned single-rotor motor and double-rotor model with the outer rotor blocked. The presented results showed relatively good compliance between the model and real motor.
Model służący kształtowaniu procesu zarządzania projektem informatycznym dla podniesienia gotowości do zwinnej transformacji organizacji informatycznej.
- Cezary Orłowski
- Tomasz Deręgowski
- Miłosz Kurzawski
- Artur Ziółkowski
2016
Celem artykułu jest zaproponowanie hybrydowego modelu projektowania procesów wytwórczych i zarządczych, opartych na standardowych rozwiązaniach obowiązujących w organizacjach informatycznych, dostosowanych do unikalnej specyfiki realizowanych projektów. Metoda ma w zamyśle podnieść gotowość organizacji informatycznych do rozpoczęcia procesów zwinnej transformacji poprzez dostarczenie optymalnych, zwinnych procesów zarządzania projektami realizowanymi w ramach organizacji. Rozpoczęcie procesu transformacji po osiągnieciu stanu gotowości stwarza warunki, że proces ten zakończy się sukcesem.
Model zwinnego procesu innowacji produktowej i organizacyjnej na przykładzie Wolters Kluwer
- Marek Wirkus
- Zejer Piotr
2016 Pełny tekst Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Celem artykułu jest przedstawienie zwinnego procesu innowacji produktowej i organizacyjnej opracowanej i zaimplementowanej w Wolters Kluwer. Przedstawiono cechy i naturę innowacji produktowej i organizacyjnej opisując jej podstawową charakterystykę. Omówione zostały główne założenia, szanse i zagrożenia zwinnego procesu innowacji. Opisano poszczególne kroki procesu, który pozwoli czytelnikowi zrozumieć sposób implementacji i zastosowania omawianego procesu. Autorzy przedstawiają również sugestie i wnioski, które są kluczowe z punktu widzenia zastosowania procesu w warunkach innych organizacji.
Modeling and control of a redundantly actuated variable mass 3RRR planar manipulator controlled by a model-based feedforward and a model-based-proportional-derivative feedforward–feedback controller
- Krzysztof Lipiński
2016 MECHATRONICS
In the paper, dynamics of a complex mechatronics system is considered. A redundantly actuated planar manipulator is the base of the mechanical part of it. It is a 3RRR 1 platform based parallel manipulator. To control its trajectory, a model-based feedforward controller is employed. Three aspects are fundamental in the presented investigations. The first focus is on development of an accurate numerical model used to solve the inverse dynamic problem in the controller loop of the model-based controller. As redundancies are present in actuation, traditional estimation techniques cannot be used to estimate the torques (a non-square matrix is present in the equation). Instead of the classical inverse, the right Moore–Penrose pseudo-inverse is used to estimate the torques. Passing to the second aspect, to realize the first run of the control algorithm, roughly estimated inertia parameters have to be implemented in the controller. Inertia parameters of the real object can differ from these implemented in the controller (the load of the platform is a variable mass element). As it is proofed in the paper, precision is a critical aspect of these estimations. When inappropriate estimation is proposed, significant trajectory errors are observed. To eliminate the consequences of the estimation errors, the control loop is extended with some additional PD (proportional-derivative) feedforward–feedback controller. Collaboration between these two controllers is the announced second objective of the paper. Intensive work of the PD controller is not required for a long time in the control loop, thus the third of the paper’s fundamental objectives is dedicated to identification methods. Basing it in the PD signal value, some corrections are proposed for values of the inertia parameters and modification of the parameters is performed in the numerical description of the model-based controller.
Modeling and Designing Acoustical Conditions of the Interior – Case Study
- Bożena Kostek
- Sebastian Laskowski
- Karolina Mizgier
2016 Pełny tekst Archives of Acoustics
The primary aim of this research study was to model acoustic conditions of the Courtyard of the Gdańsk University of Technology Main Building, and then to design a sound reinforcement system for this interior. First, results of measurements of the parameters of the acoustic field are presented. Then, the comparison between measured and predicted values using the ODEON program is shown. Collected data indicate a long reverberation time which results in poor speech intelligibility. Then, a thorough analysis is perform to improve the acoustic properties of the model of the interior investigated. On the basis of the improved acoustic model two options of a sound reinforcement system for this interior are proposed, and then analyzed. After applying sound absorbing material it was noted that the predicted speech intelligibility increased from bad/poor rating to good category. słowa kluczowe: acoustic field analysis and modeling; acoustic conditions measurements and analysis; sound reinforcement system design
Modeling DAC Application Execution Time
- Jarosław Kuchta
2016
An application written in the Divide And Conquer paradigm is more diﬃcult to model than SPMD application because of complex algorithm, causing use of many coeﬃcients in a computational complexity function. Processors are divided into various layers, each layer contains diﬀerent number of processors. Data packets processed in diﬀerent layers and transferred between layers have diﬀerent length. Moreover ﬁrst layer processors use a diﬀerent algorithm than others and, in an optimized conﬁguration, the same processors can belong to diﬀerent layers. Despite this we addressed these problems using an external solver to evaluate several coeﬃcients.
Modeling energy consumption of parallel applications
- Paweł Czarnul
- Jarosław Kuchta
- Paweł Rościszewski
- Jerzy Proficz
2016 Pełny tekst Annals of Computer Science and Information Systems
The paper presents modeling and simulation of energy consumption of two types of parallel applications: geometric Single Program Multiple Data (SPMD) and divide-and-conquer (DAC). Simulation is performed in a new MERPSYS environment. Model of an application uses the Java language with extension representing message exchange between processes working in parallel. Simulation is performed by running threads representing distinct process codes of an application, with consideration of process counts. Instead of running time consuming calculations, their times are simulated using functions representing computational time dependent on input data sizes. The simulator considers performance and power consumption values for compute devices stored in its database. We performed verification of running the two applications on up to 1000 and 1024 processes respectively on a large cluster from Academic Computer Center in Gdansk demonstrating a high degree of accuracy between simulated and measured results.
Modeling of Combined Phenomena Affecting an AUV Stealth Vehicle
- Mirosław Gerigk
2016 Pełny tekst TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation
In the paper some results of research connected with modelling the basic stealth characteristics of an AUV vehicle are presented. First of all a general approach to design of the stealth AUV autonomous underwater vehicle under consideration is introduced. Then, the AUV stealth vehicle concept is briefly described. Next a method of modelling of the stealth characteristics is briefly described as well. As an example of the stealth characteristics investigations some results of modelling the boundary layer and wake are presented. Some remarks regarding the behaviour of the AUV stealth vehicle in the submerged conditions are given. The final conclusions are presented.
Modeling of Ice Passage Through Reservoirs System on the Vistula River
- Tomasz Kolerski
2016 GeoPlanet: Earth and Planetary Sciences
Numerical model was used to assess ice passage through proposed reservoir on the lower Vistula River. Model results were compared with observation on the Vistula River, but because the dam is not constructed yet, the direct comparison was not possible. The study focused on ice movement and accumulation in the reservoir for variety of low flow condition with and without wind effect. Bridge’s piers in the upper part of the reservoir were found to be one of the most important parameters affecting ice passage at the proposed dam. The other parameter which hampers or may even lead to stopping ice movement is western wind. The study took place within the framework of exclusive analysis for selecting the final location of a new dam which is critical for ensuring permanent safety of the Włocławek dam. Based on the performed study, the Przypust and Siarzewo variants accomplished the required goals to the largest extent at acceptable risk of ice stoppage and accumulation. Icebreaker operation is required during the ice sluicing operation in the new reservoir.
Modeling of Performance, Reliability and Energy Efficiency in Large-Scale Computational Environment
- Jarosław Kuchta
2016
Large scale of complexity of distributed computational systems imposes special challanges for prediction of quality in such systems.Existing quality models for lower-scale systems include functionality,performance,reliability,flexibility and usability.Among these attributes,performance and reliability have a particular significance to the large-scale systems computing quality modeling due to their strong dependence on the system configuration.The system configuration may has also influence to overall system energy consumption.This article presents aquality model of the large-scale systems computations and the analysis of performance,reliability and energy consumption dependency on system configuration.
Modeling of pharmaceuticals mixtures toxicity with deviation ratio and best-fit functions models
- Monika Wieczerzak
- Błażej Kudłak
- Galina Yotova
- Miroslava Nedyalkova
- Stefan Tsakovski
- Vasil Simeonov
- Jacek Namieśnik
2016 Pełny tekst SCIENCE OF THE TOTAL ENVIRONMENT
The present study deals with assessment of ecotoxicological parameters of 9 drugs (diclofenac (sodium salt), oxytetracycline hydrochloride, fluoxetine hydrochloride, chloramphenicol, ketoprofen, progesterone, estrone, androstenedione and gemfibrozil), present in the environmental compartments at specific concentration levels, and theirmutual combinations by couples against Microtox® and XenoScreen YES/YAS® bioassays. As the quantitative assessment of ecotoxicity of drug mixtures is an complex and sophisticated topic in the present study we have used two major approaches to gain specific information on themutual impact of twoseparate drugs present in a mixture.The first approach is well documented in many toxicological studies and follows the procedure for assessing three types of models, namely concentration addition (CA), independent action (IA) and simple interaction (SI) by calculation of a model deviation ratio (MDR) for each one of the experiments carried out. The second approach used was based on the assumption that the mutual impact in each mixture of two drugs could be described by a best-fit model function with calculation of weight (regression coefficient or other model parameter) for each of the participants in the mixture or by correlation analysis. It was shown that the sign and the absolute value of the weight or the correlation coefficient could be a reliable measure for the impact of either drug A on drug B or, vice versa, of B on A. Results of studies justify the statement, that both of the approaches show similar assessment of the mode of mutual interaction of the drugs studied. It was found that most of the drug mixtures exhibit independent action and quite few of the mixtures show synergic or dependent action.
Modeling of TEC Variations Based on Signals from Near Zenith GNSS Satellite Observed by Dense Regional Network
- Yevgen M. Zanimonskiy
- Grzegorz Nykiel
- Alex V. Paznukhov
- Mariusz Figurski
2016
Currently the substantial successes in high-resolution ionospheric mapping is declared in many publications. Nevertheless, up to now there are no examples of dynamic visualization of TEC disturbances on regional scale with as high resolution as tropospheric models. Over the years, ionosphere has been modeling basing on the simple assumption, that it is a thin layer, which surrounds the Earth at some arbitrary height. However, the choice of this height was also a subject of special investigations and up to now has not been clearly defined. Ambiguity of this choice leads to uncertainty of coordinates of ionospheric pierce points (IPP). Usage of various heights of ionospheric layer substantially changes the configuration of IPPs of all-in-view satellites. In such a way, the model will be different for different layer heights and model will be distorted. Dense network of GNSS receivers makes it possible to mapping the regional ionosphere basing on data from observations of one satellite. In this case, IPPs are uniquely determined and the model is similar, independently of layer height, except some displacements and variations of scale. In the case of satellite passing through near zenith, the model is practically self-similar for elevations more 70°. Each regional STEC variation map in this study was produced from observation data using one near zenith satellite, in contrast to the conventional approach which is based on usage of all-in-view ones. Two-dimensional total electron content (STEC) perturbations over Poland are mapped using ASG-EUPOS GNSS permanent network, with spatial resolution of 50 kilometers. These regional maps of TEC with such a high resolution allow revealing structures and evolutions of ionospheric disturbances at the mid-latitudes. A preliminary result of the STEC perturbation mapping indicates that it could be a strong tool to investigate the ionospheric structures in details.
Modeling Parallel Applications in the MERPSYS Environment
- Paweł Czarnul
2016
The chapter presents how to model parallel computational applications for which simulation of execution in a large-scale parallel or distributed environment is performed within the MERPSYS environment. Specifically, it is shown what approaches can be adopted to model key paradigms often used for parallel applications: master-slave, geometric parallelism (single program multiple data), pipelined and divide-and-conquer applications. A detailed approach is proposed for geometric parallel applications along with steps that need to be taken in the MERPSYS environment: from modeling to simulation of execution.
Modeling SPMD Application Execution Time
- Jarosław Kuchta
2016
Parallel applications in a Single Process Multiple Data paradigm assume splitting huge amounts of data to multiple processors working in parallel at small data packets. As the individual data packets are not independent, the processors must interact with each other to exchange results of the calculations with their adjacent partners and take these results into account in their own computations. An example of SPMD is geometric parallelism when a huge map of image data is divided into regular (e.g. rectangular) regions which are assigned to separate processors. The main problem with modeling of such applications in MERPSYS is that a single processor interacts with dynamically pointed partners, but the MERPSYS simulator engine requires static labeling of communication peers. In this chapter we show how we have coped with this problem.
Modeling the Effect of External Carbon Source Addition under Different Electron Acceptor Conditions in Biological Nutrient Removal Activated Sludge Systems
- Xiang Hu
- Kamil Wiśniewski
- Krzysztof Czerwionka
- Qi Zhou
- Li Xie
- Jacek Mąkinia
2016 ENVIRONMENTAL SCIENCE & TECHNOLOGY
he aim of this study was to expand the International Water Association Activated Sludge Model No. 2d (ASM2d) to predict the aerobic/anoxic behavior of polyphosphate accumulating organisms (PAOs) and “ordinary” heterotrophs in the presence of different external carbon sources and electron acceptors. The following new aspects were considered: (1) a new type of the readily biodegradable substrate, not available for the anaerobic activity of PAOs, (2) nitrite as an electron acceptor, and (3) acclimation of “ordinary” heterotrophs to the new external substrate via enzyme synthesis. The expanded model incorporated 30 new or modified process rate equations. The model was evaluated against data from several, especially designed laboratory experiments which focused on the combined effects of different types of external carbon sources (acetate, ethanol and fusel oil) and electron acceptors (dissolved oxygen, nitrate and nitrite) on the behavior of PAOs and “ordinary” heterotrophs. With the proposed expansions, it was possible to improve some deficiencies of the ASM2d in predicting the behavior of biological nutrient removal (BNR) systems with the addition of external carbon sources, including the effect of acclimation to the new carbon source.
Modeling the global atmospheric transport and deposition of mercury to the Great Lakes
- Mark Cohen
- Roland R. Draxler
- Richard S. Artz
- Pierrette Blanchard
- Thomas M. Holsen
- Daniel A. Jaffe
- Paul Kelley
- Hang Lei
- Christopher P. Loughner
- Winston T. Luke
- Seth N. Lyman
- David Niemi
- Józef Pacyna
- Martin Pilote
- Laurier Poissant
- Dominique Ratte
- Xinrong Ren
- Frits Steenhuisen
- Alexandra Steffen
- Rob Tordon
- Simon J. Wilson
2016 Pełny tekst Elementa-Science of the Anthropocene
Mercury contamination in the Great Lakes continues to have important public health and wildlife ecotoxicology impacts, and atmospheric deposition is a significant ongoing loading pathway. The objective of this study was to estimate the amount and source-attribution for atmospheric mercury deposition to each lake, information needed to prioritize amelioration efforts. A new global, Eulerian version of the HYSPLIT-Hg model was used to simulate the 2005 global atmospheric transport and deposition of mercury to the Great Lakes. In addition to the base case, 10 alternative model configurations were used to examine sensitivity to uncertainties in atmospheric mercury chemistry and surface exchange. A novel atmospheric lifetime analysis was used to characterize fate and transport processes within the model. Model-estimated wet deposition and atmospheric concentrations of gaseous elemental mercury (Hg(0)) were generally within ~10% of measurements in the Great Lakes region. The model overestimated non-Hg(0) concentrations by a factor of 2–3, similar to other modeling studies.
Modeling the impact of surface currents in a harbor using graph theory
- Jerzy Pyrchla
- Lech Kasyk
- Martyna Leyk
- Monika Kijewska
- Marek Kowalewski
2016 Pełny tekst Zeszyty Naukowe Akademii Morskiej w Szczecinie
Ensuring security in a harbor requires research into its infrastructure using spatial environmental data. This paper presents a methodology that defines the design of a graph for modeling the interactions between surface currents and moving objects. Combining this graph with port charts that integrate electronic navigation charts with coastal orthophotographs allows us to perform a multidimensional analysis. In addition, the complete information about navigation and harbor infrastructure allows us to predict the effects of currents on objects that are moving in the dock. The capabilities of this application were tested in the Gdynia harbor and the defined graph is based on sea currents generated by the numerical hydrodynamic model M3D.
MODELING THE pH EFFECTS ON NITROGEN REMOVAL IN THE ANAMMOX-ENRICHED GRANULAR SLUDGE
- Xi Lu
- Dominika Sobotka
- Kamil Wiśniewski
- Krzysztof Czerwionka
- Lie Xie
- Qi Zhou
2016
The aim of the study was to determine the pH effects on nitrogen removal in the anammox-enriched 10 granular sludge. The experimental data were extracted from a 4L completely-mixed batch reactor with the 11 granular sludge at different initial pH values (6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5) and constant temperature 12 T=30℃. Simulations were run in GPS-X 6.4 using a comprehensive mechanistic model Mantis2. Two 13 kinetic parameters, including the maximum specific growth rates of ammonia oxidizing bacteria (AOB) and 14 anammox bacteria were optimized at different pH scenarios. The inhibitory effects of the pH extremes on 15 the anammox-enriched sludge were discussed in terms of the inhibition of free nitrous acid (FNA) and free 16 ammonia (FA) and metabolic mechanisms. Two different pH functions were used to examine the pH effects 17 on the nitrogen removal kinetics. The pH optima for AOB and anammox bacteria were 7.4 and 7.6, 18 respectively. The maximum specific growth rates of AOB and anammox bacteria at the pH optima were 19 0.84 d-1 and 0.37 d-1 (at T=30℃). The measured specific anammox activities (SAAs), predicted SAAs by 20 Mantis2 and fitted SAAs by the Michaelis pH function at the pH optima were 0.895 gN/(gVSS·d), 0.829 21 gN/(gVSS·d) and 0.831 gN/(gVSS·d), respectively.
Modeling Volunteer Based Systems
- Mariusz Matuszek
2016
There are two main approaches to processing tasks requiring high amounts of computational power. One approach is using clusters of mostly identical hardware, placed in dedicated locations [1, 2, 3]. The other approach is outsourcing computing resources from large numbers of volunteers connected to the Internet [7]. This chapter presents an application of a mathematical model of the volunteer computing presented in Volume 1 of this book [4] to the task of simulating voluntary computing based applications.
Modelling long-term technological transition of Polish power system using MARKAL: Emission trade impact
- Marcin Jaskólski
2016 Pełny tekst ENERGY POLICY
The need for technological transition of electricity production becomes a global problem. However, in coal-dominated Polish power system this need is even more crucial than anywhere, since technical lifetime of the most domestic power plants is ending. In this paper, the impact of the EU Emission Trading Scheme (EU ETS) for CO2 combined with sulfur dioxide (SO2) and nitrogen oxides (NOx) emission trading mechanism on power technology choice was studied using Market Allocation (MARKAL) model of Polish power system. Poland can contribute to achieving ambitious EU CO2 emission reduction goals to 2050 by switching to diversified electricity mix of low-carbon coal technologies with CCS, and carbon-free options e.g. nuclear, biomass IGCC, wind onshore and offshore. This ‘low-carbon’ mix can be achieved only at high emission allowance prices, stimulated by the introduction of Market Stability Reserve to EU ETS and successive decrease in EU CO2 emission cap. At high emission allowance prices, Poland's CO2 emissions from ETS-participating electricity generating plants are expected to decrease in 2010–2050 period by 96–99%, depending on the projected electricity consumption. Model results prove that SO2/NOx emission trading scheme, envisaged in Poland, is not effective, in view of Industrial Emission Directive implementation, and should be reconsidered.