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Wyniki wyszukiwania dla: GRAD-CAM
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Systemy CAD, CAM, CAE (PG_00057113)
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Electric Vehicles and Vehicle–Grid Interaction in the Turkish Electricity System
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Automatic evaluation of information credibility in Semantic Web and Knowledge Grid
PublikacjaThis article presents a novel algorithm for automatic estimation of information credibility. It concerns information collected in Knowledge Grid and Semantic Web. Possibilities to evaluate the credibility of information in such structures are much greater than those available for WWW sites which use natural language. The rating system presented in this paper estimates credibility automatically on the basis of the following metrics:...
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The influence of plastic deformation on the magnetoelastic properties of the CSN12021 grade steel
PublikacjaWłasności magnetosprężyste materiałów są silnie modyfikowane przez zmiany struktury dyslokacyjnej, które są wynikiem procesów deformacji plastycznej. Zmiany te mogą być wykorzystane jako podstawa do opracowania metody nieniszczącej oceny stopnia deformacji materiału.Jak dotychczas zaproponowane zostały różne metody, oparte na pomiarach pętli histerezy magnetycznej czy też natężenia magnetycznego efektu Barkhausena. Artykuł porównuje...
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Grade of service determination methodology in IP networks with SIP protocol
PublikacjaAlthough Grade of Service is very important in VoIP providers evaluation, We wasn't able to find any paper regarding the topic of measuring GoS variables for IP networks utilizing SIP, which are defined like for PSTN/ISDN/GSM networks (post-selection delay, answering delay, release delay, or probability of end-to-end blocking). Due to the lack of research in this field, it was necessary to start from defining measures and cover...
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Cooperation of a Non-Linear Receiver with a Three-Phase Power Grid
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Smart grid technologies in electric traction: Mini inverter station
PublikacjaThe growing number of trams and trolleybuses equipped with recuperation systems contribute to the increase in the amount of energy recovered during braking. It raises questions about the possibility of its usage. One of such possibilities is the use of smart grid technology. The paper presents a case study of the use of braking energy in the trolleybus system for external loads by implementing mini inverter stations. Analysis is...
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Use of AMI Meters in the Process of Low Voltage Grid Optimization
PublikacjaThis is a report of a project involving, inter alia, low voltage grid performance optimization with data from AMI meters . The study was supported with a European UPGRID grant, and executed by a consortium of companies from seven European countries, including Poland .
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Genetic Positioning of Fire Stations Utilizing Grid-computing Platform
PublikacjaA chapter presents a model for determining near-optimal locations of fire stations based on topography of a given area and location of forests, rivers, lakes and other elements of the site. The model is based on principals of genetic algorithms and utilizes the power of the grid to distribute and execute in parallel most performance-demanding computations involved in the algorithm.
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Application of PL-Grid Platform for Modeling of the Selected Acoustic Phenomena
PublikacjaDomain grids are specific computational environments, developed within the PLGrid Plus project. For the Acoustic domain grid two supercomputer grid based services were prepared. Dedicated software consists of the outdoor sound propagation module and psychoacoustical noise dosimeter. The results are presented in a form of maps of sound level and Temporary Threshold Shift (TTS) values, therefore the services may play an informative...
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A Point Set Connection Problem for Autonomous Mobile Robots in a Grid
PublikacjaConsider an orthogonal grid of streets and avenues in a Manhattan-like city populated by stationary sensor modules at some intersections and mobile robots that can serve as relays of information that the modules exchange, where both module-module and module-robot communication is limited to a straight line of sight within the grid. The robots are oblivious and move asynchronously. We present a distributed algorithm that, given...
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Low Frequency Conducted Emissions of Grid Connected Static Converters
PublikacjaPulse-width modulated rectifiers are nowadays commonly used for AC to DC power conversion. PWM rectification technology is very effective and allows for bidirectional power flow with the possibility of power factor improvement and low-order harmonic emission limitation. Unfortunately, employed PWM boost topology results with generation of input current harmonic distortions in a frequency range tightly correlated to modulation frequency....
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Estimation of the Maximum Permissible PV Power to be Connected to the MV Grid
PublikacjaIn recent decades, a significant increase in the share of renewable energy sources in power grids at various voltage levels has been observed. A number of articles have been published highlighting emerging problems in low-voltage grids with a large share of prosumers and in medium- and high-voltage grids to which photovoltaic (PV) plants are connected. The article analyzes the medium-voltage grid in terms of the possibility of...
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Hydrogen direct reduction and reoxidation behaviour of high-grade pellets
PublikacjaHigh grade pellets with basicity index close to 0.5 were directly reduced in pure hydrogen atmosphere. The reduction experiments were performed in the temperature range 800 e1000 C at the pressure of 8 bar. The pellets internal structure was analysed through micro tomography observations in the unreduced and reduced conditions. After reduction, the pellets showed a variation of porosity up to more than 15% with a remarkable change...
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A Paradigm for HV, MV, LV Distribution Grid Development Planning
PublikacjaIn the literature, including that relating to businesses in the energy (and power) sector, the concept of these organizations’ operating paradigm may be found. The paper discusses the concept of the paradigm, with a focus on the power grid development planning paradigm. Against this background, issues related to energy security and power systems development trends and problems are presented. A new paradigm is proposed for distribution...
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Mini Smart Grid system w trakcyjnym układzie zasilania
PublikacjaWraz ze wzrostem liczby tramwajów i trolejbusów wyposażonych w hamowanie odzyskowe, wzrasta popularność urządzeń zwiększających efektywność odzysku energii. Są nimi głównie superkondensatorowe zasobniki energii oraz układy falownikowe umożliwiające zwrot energii do sieci prądu przemiennego. Jednak wysoka cena tych urządzeń oraz problemy prawno-organizacyjne stanowią znaczną barierę dla ich szerszego rozpowszechnienia. W artykule...
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Complementary and alternative medicine (CAM) use among patients with cancer undergoing palliative care: A pilot study of a single institution in Poland.
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The use of CAD applications in the design of shredders for polymers
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New generation cooling systems for car engines
PublikacjaNormy czystości spalin silników samochodowych wymusiły rozwój elektronicznego sterowania pracą silników samochodowych. Do niedawna układy chłodzenia były bardzo tradycyjnymi - niesterowanymi programowo. W artykule przedstawiono możliwości wprowadzenia zaawansowanego sterowania mikroprocesorowego do układów chłodzenia silników spalinowych. Rozważania zilustrowano badaniami z literatury i własnymi pomiarami autora.
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Stateczność układu ram ze stężeniami pionowymi
PublikacjaW pracy przeprowadzono analizę stateczności i zachowania pokrytycznego układu ram płaskich usztywnionego stężeniami pionowymi w postaci dwóch krzyżujących się prętów. Uwzględniono także sprężyste połączenia poszczególnych ram na poziomie obciążeń pionowych oraz sprężyte zamocowanie w fundamentach. Wykazano,że punkt bifurkacji jest symetryczny ale niestateczny co wskazuje na możliwość redukcji obciążeń krytycznych, w przypadku uwzględniania...
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CRI board for CBM experiment: preliminary studies
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Agile Development of Critical Software - Can It be Justified?
PublikacjaThe paper introduces the problem of application of agile practices in critical software development projects. It summarizes the present state of research and identifies the need for having a ready-to-use model of being agile while still meeting the required assurance levels which could be particularly useful for small and medium sized safety-critical software companies. Then the objective and scope of a research aiming at delivering...
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Microbiological Hazard Analysis of Car Wash Wastewater
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Car-sharing: The Impact on Metropolitan Spatial Structures
PublikacjaMany examples from the past show that new technologies designed to solve particular problems can also create side effects generating new problems. Some unforeseen or unwanted results may influence space use and spatial structures. Car-sharing is an invention to compete with car ownership. It drastically rise efficiency of car use, reducing the number of vehicles per users. Diffusion of car-sharing is going to accelerate in the...
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A Cross-Team Collaborative Evaluation of a CRM System
PublikacjaThis paper presents an analysis of an usability evaluation a CRM (Customer Relationship Management) performed by a team composed of external usability experts jointly with a CRM staff. The evaluation process differed from a classical scheme known from former projects, including some new elements resulting from a specific context of this study. These novel elements resulted in reshaping the role of the CRM system and considering...
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Zero-Pole Space Mapping for CAD of Filters
PublikacjaIn this paper, we propose a new space-mapping technique tailored to the CAD of microwave filters. The goal of space mapping is to achieve a satisfactory design with the minimal number of fine model evaluations. In our approach, the filter is represented by a rational function. To quickly align the coarse and fine models, and to speed up the direct optimization of the coarse model, we propose matching the zeros and poles of a rational...
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Potential diagnostic utility of recombinant Toxoplasma gondii proteins for detecting anti-Toxoplasma gondii IgG antibodies in horses serum samples
Dane BadawczeToxoplasmosis is caused by an intracellular protozoan, Toxoplasma gondii, and is a parasitic disease that occurs in all warm-blooded animals, including humans. Toxoplasmosis is one of the most common parasitic diseases of animals and results in reproductive losses. Diagnosis of toxoplasmosis is currently based on serological assays using native antigens...
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Potential diagnostic utility of recombinant Toxoplasma gondii proteins for detecting anti-Toxoplasma gondii IgG antibodies in goat serum samples
Dane BadawczeToxoplasmosis is caused by an intracellular protozoan, Toxoplasma gondii, and is a parasitic disease that occurs in all warm-blooded animals, including humans. Toxoplasmosis is one of the most common parasitic diseases of animals and results in reproductive losses. Diagnosis of toxoplasmosis is currently based on serological assays using native antigens...
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Potential diagnostic utility of recombinant Toxoplasma gondii proteins for detecting anti-Toxoplasma gondii IgG antibodies in feline serum samples
Dane BadawczeToxoplasmosis is caused by an intracellular protozoan, Toxoplasma gondii, and is a parasitic disease that occurs in all warm-blooded animals, including humans. Toxoplasmosis is one of the most common parasitic diseases of animals and results in reproductive losses. Diagnosis of toxoplasmosis is currently based on serological assays using native antigens...
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Gra słowna do pozyskiwania wiedzy językowej
PublikacjaW artykule opisano implementację gry słownej w pytania, będącej modelem wyszukiwarki kontekstowej oraz narzędziem do pozyskiwania wiedzy o pojęciach języka naturalnego. Zdefiniowano określenie wyszukiwania kontekstowego oraz przedstawiono opis algorytmu znajdującego obiekty na podstawie ich cech. Scharakteryzowano przyjętą reprezentację wiedzy oraz sposób uczenia się w kontekście innych znanych projektów poruszających problem akwizycji...
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Prototypowanie wspomagane komputerowo [2022/23]
Kursy OnlineWprowadzenie do technik CAx komputerowe wspomaganie (Computer Aided ...). Programy wspomagające projektowanie. Szybkie prototypowanie (Rapid prototyping). Systemy CAD/CAE/CAM w elektrotechnice. Komputerowo wspomagane: projektowanie elementów indukcyjnych (FEMM), projektowanie układów elektronicznych (LTSpice), projektowanie obwodów drukowanych (Eagle), programowanie obrabiarek CNC, projektowanie CAD 3D do druku przestrzennego....
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Recreation of Voltage Fluctuation Using Basic Parameters Measured in the Power Grid
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Investor focused placement and sizing of photovoltaic grid-connected systems in Pakistan
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Future Challenges and Issues in Evolution of the Smart Grid and Recommended Possible Solutions
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Single-phase power electronics transformer with active functions for smart grid
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Power electronic systems as a crucial part of Smart Grid infrastructure - a survey
PublikacjaThis article gives a tutorial overview of the most important issues related to the use of power electronic systems in power engineering, with respect to the urgent need for modernization of existing grids in the direction of intelligent networks. The main problems and conditions bound up with the construction of Smart Grids and the location, as well as functioning in them of the most important power electronic systems are presented...
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Wybrane rozwiązania występujące w architekturach systemów rozproszonych klasy grid
PublikacjaOpisano wybrane rozwiązania występujące w architekturach systemów rozproszonych klasy grid. Odniesiono się do zapewnienia przezroczystości, a także do możliwości zarządzania i kontroli wykorzystania zasobów. Omówiono zasady optymalizacji zarządzania takimi systemami.
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Mersenne Number Finding and Collatz Hypothesis Verification in the Comcute Grid System
PublikacjaIn this chapter, some mathematic applications have been described to test scalability of the Comcute grid system. Especially, a verification of the Collatz hypothesis and finding Mersenne numbers were applied to prove the scalability and high performance of this grid system. Results were compared with outcomes obtained by the other grid systems.
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Creating Dynamic Maps of Noise Threat Using PL-Grid Infrastructure
PublikacjaThe paper presents functionality and operation results of a system for creating dynamic maps of acoustic noise employing the PL-Grid infrastructure extended with a distributed sensor network. The work presented provides a demonstration of the services being prepared within the PLGrid Plus project for measuring, modeling and rendering data related to noise level distribution in city agglomerations. Specific computational environments,...
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Frequently updated noise threat maps created with use of supercomputing grid
PublikacjaAn innovative supercomputing grid services devoted to noise threat evaluation were presented. The services described in this paper concern two issues, first is related to the noise mapping, while the second one focuses on assessment of the noise dose and its influence on the human hearing system. The discussed services were developed within the PL-Grid Plus Infrastructure which accumulates Polish academic supercomputer centers....
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Selected Technical Requirements for Photovoltaic Plant Interconnection with a Medium Voltage Grid
PublikacjaThe article discusses some selected technical requirements, which according to these authors should be recognised and met by photovoltaic power plants connected to national distribution grids in the context of their likely development. This development today is limited, since Polish legislation has not implemented the relevant EU Directive [8]. The study points out the purposefulness of incorporating the necessary requirements...
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Voltage Harmonic Distortion Measurement Issue in Smart-Grid Distribution System
PublikacjaThis paper presents the investigation results ofvoltage harmonic transfer accuracy problems through voltagetransformers which are widely used in power quality monitoringsystems in medium and high voltage grids. A simplified lumpedparameters circuit model of the voltage transformer is presentedand verified by simulation and experimental investigations. Anumber voltage transformers typically used in medium voltagegrid has been tested...
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Tribological and corrosion testing of surface engineered surgical grade CoCrMo alloy
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SMART GRID TECHNOLOGIES IN ELECTRIC POWER SUPPLY SYSTEMS OF PUBLIC TRANSPORT
PublikacjaNowadays the issue of electric energy saving in public transport is becoming a key area of interest, which is connected both with a growth in environmental awareness of the society and an increase in the prices of fuel and electricity. It can be achieved by reducing the transmission losses in a supply system or by the improving the usage of the regenerative breaking. The article presents an analysis of applying these two options...
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Comprehensive compensation of grid current distortion by shunt active power filters
PublikacjaThe paper presents a comprehensive approach to the compensation of grid current distortion in shunt active power filter systems. Four sources of current distortion are addressed: imperfect grid synchronization caused by the distortion in the grid voltages, time delays in the evaluation of grid voltages and computation of compensating currents, fluctuations of the dc bus voltage, and the distortion of inverter output voltages due...
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An Overview of Bidirectional EV Chargers: Empowering Traction Grid-Powered Chargers
PublikacjaIn recent years, the number of electric vehicles has been at least doubling year after year. As a result, today electric vehicles already account for approximately 10% of the global automotive market, which positively affects environment in urbanized areas. However, to take full advantage of the EV integration it is necessary to use renewable sources for their charging; optimally place charging stations/terminals; optimally manage...
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TRAVELLING WAVES FOR LOW–GRADE GLIOMA GROWTH AND RESPONSE TO A CHEMOTHERAPY MODEL
PublikacjaLow-grade gliomas (LGGs) are primary brain tumours which evolve very slowly in time, but inevitably cause patient death. In this paper, we consider a PDE version of the previously proposed ODE model that describes the changes in the densities of functionally alive LGGs cells and cells that are irreversibly damaged by chemotherapy treatment. Besides the basic mathematical properties of the model, we study the possibility of the...
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VSC converters control for offshore wind farms HVDC grid connection
PublikacjaThe paper proposes a voltage sourced converter (VSC) new control method. A well-known in the electric power systems correlation between voltage angle and active power and correlation between voltage and reactive power is used instead of feedforward control. This allows for a fast and almost independent control of active and reactive power flow.
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Smart Grid in Practise - Implementation of the Billaterall Supply in Gdynia Trolleybus Network
PublikacjaSince 2001, trolleybus system in Gdynia has been involved in many activities related to the reduction of power consumption, both in terms of implementation and research and development. In 2011 was introduced the first supercapacitor storage energy system. In PKT started applications of Smart Grid technologies in supply network: the bilateral supply. The paper presents results of these this novel investitions.
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Digital Fingerprinting Based on Quaternion Encryption Scheme for Gray-Tone Images
PublikacjaIn this paper a new idea of digital images fingerprinting is proposed. The method is based on quaternion encryption in the Cipher Block Chaining (CBC) mode. Quaternion sare hyper-complex numbers of rank 4 and thus often applied to mechanics in three-dimensional space. The encryption algorithm described in the paper is designed for gray-tone images but can easily be adopted for color ones. For the encryption purpose, the algorithm...