Search results for: orunski stream - Bridge of Knowledge

Search

Search results for: orunski stream

Filters

total: 4636
filtered: 2711

clear all filters


Chosen catalog filters

  • Category

  • Year

  • Options

clear Chosen catalog filters disabled

Search results for: orunski stream

  • MATHEMATICAL MODELING OF FLOOD MANAGEMENT SYSTEM IN THE CITY OF GDAŃSK, ORUŃSKI STREAM CASE STUDY

    Aim of the study This study analyses the efficiency of flood protection in a small urban catchment, based on a system of small reservoirs. Material and methods To assess the flood routing and surge reduction, a mathematical model of the river catchment was implemented. This was a lumped hydrological model, based on the SCS-CN method. Channel routing was performed, using kinematic wave equation. The sub-catchments have been determined...

    Full text available to download

  • Complementary studies of residual stress distribution of repaired power plant steam turbine casing

    Publication

    - Year 2005

    Rozkład i poziom naprężeń własnych w korpusach turbin badano za pomocą efektu Barkhausena oraz metodą nawiercania otworów. Badano również twardość. Korpusy były reperowane metodą zaspawania. Wykazano, iż zastosowana technologia nie wprowadza naprężeń o poziomie zagrażającym dalszej ekploatacji korpusu.

  • Concentration of proteins in the whey stream

    Publication

    Zastosowano metodę separacji pianowej do odzyskiwania białka z serwatki. Wykazano silny wpływ prędkości powietrza w kolumnie, początkowego stężenia białka w serwatce i pH roztworu na przebieg i skuteczność flotacji. Współczynnik wzbogacenia maleje ze wzrostem prędkości przepływu powietrza oraz ze wzrostem początkowego stężenia białka serwatkowego. Najwyższą wartość współczynnika wzbogacenia uzyskano dla pH naturalnej serwatki.

    Full text to download in external service

  • On power stream in motor or drive system

    Publication

    In a motor or in a drive system the quantity of power increases in the direction opposite to the direction of power flow. Energy losses and energy efficiency of a motor or a drive system must be presented as functions of physical quantities independent of losses. Such quantities are speed and load. But the picture of power stream in a motor or in a drive system is presented in the literature in the form of traditional Sankey...

    Full text available to download

  • Metrisability of managing of stream-systemic processes

    Publication

    To achieve the planned goal, in order to properly describe the manufacturing system management, six process stream functions were introduced. Non-dimensional flows of these functions in time can be empirically defined during the manufacturing process. They are interpreted as non-dimensional expenses. Maximum values for these functions in properly-managed processes equal one. Also, a global management function was introduced, being...

    Full text available to download

  • Discussion of Derivability of Local Residual Stress Level from Magnetic Stray Field Measurement

    The NDT procedure dubbed ‘metal magnetic memory’ method and the related ISO 24497 standard has found wide industrial acceptance in some countries, mainly in Russia and China. The method has been claimed by some researchers (Roskosz and Bieniek in NDT&E Int 45:55–62, 2012; Wilson et al. in Sens Actuators A 135:381–387, 2007) as having potential for quantitative determination of local residual stress state in engineering structures,...

    Full text available to download

  • Parallelization of video stream algorithms in kaskada platform

    Publication

    - Year 2011

    The purpose of this work is to present different techniques of video stream algorithms parallelization provided by the Kaskada platform - a novel system working in a supercomputer environment designated for multimedia streams processing. Considered parallelization methods include frame-level concurrency, multithreading and pipeline processing. Execution performance was measured on four time-consuming image recognition algorithms,...

  • A Preliminary Study and Analysis of Tidal Stream Generators

    Publication

    - Acta Energetica - Year 2020

    For a sustainable future, tidal energy can play a vital role. Tidal energy relies on the gravitational pull of the Moon and the Sun along with the centrifugal forces created by the Earth. Tidal barrage uses the potential energy from the tide and has been very successful in electricity production. With the help of a turbine, kinetic energy can also be harnessed from tidal currents to generate electricity. However, it is not economically...

    Full text available to download

  • The effect of job-related stress on psychological well-being = Wpływ stresu zawodowego na dobrostan psychiczny

    Publication

    - Year 2008

    The aim of the investigation was to evaluate the effect of job stress factors on psychological well-being of firemen. Goldberg's GHQ-12 for well-being evaluation, the Perceived Job Stress Questionnaire by Dudek et al. for job stress assessment, and indicator of participation in traumatic events were used. 19% of the firemen were qualified to the group with increased risk of mental disorders. Occupational stress had a strong impact...

  • Contamination of water in Oliwski Stream after the flood in 2016

    Publication

    In the article pollution of stream waters with surface runoff from an urbanized area caused by an extremely high rainfall is discussed. The analyzes were carried out after the rainfall of the depth 152 mm which took place in Gdańsk on 14th and 15th July 2016. This extreme rainfall caused urban flooding, damage of several retention ponds and pollution of surface waters. In the article the results of physical and chemical analyzes...

    Full text available to download

  • The concept of stream and system reliability on the example of the bakery industry

    Publication

    - Aparatura Badawcza i Dydaktyczna - Year 2019

    This article presents a new concept of technological system reliability based on the analysis of the relationship of associations of elements of energy streams, matter, information, time and finance. The method of stream specification and the method of determining the reliability values of significant and supporting relationships are given. Relevant relationships between elements of system streams were defined as having one-time...

    Full text to download in external service

  • Stream Reasoning to Improve Decision-Making in Cognitive Systems

    Publication
    • C. S. de Oliveira
    • F. Giustozzi
    • C. Zanni-Merk
    • C. Sanin
    • E. Szczerbicki

    - CYBERNETICS AND SYSTEMS - Year 2020

    ABSTRACT Cognitive Vision Systems have gained a lot of interest from industry and academia recently, due to their potential to revolutionize human life as they are designed to work under complex scenes, adapting to a range of unforeseen situations, changing accordingly to new scenarios and exhibiting prospective behavior. The combination of these properties aims to mimic the human capabilities and create more intelligent and efficient...

    Full text available to download

  • Remarks on steam condensation modeling related to steam turbine large output

    Publication

    - Year 2011

    In the paper numerical simulations have been performed to predict the performance of the diferent steam models. All of the considered models of steam condensation have been validated on the base of benchmark experiment employing expansion in nozzle and next on the low pressure part of the steam turbine equipped with the so-called Baumann stage. For numerical analysis three models have been finally used - the ideal steam model without...

  • Parallel processing of multimedia streams

    Publication

    W artykule zaprezentowana jest nowa biblioteka wspierającą tworzenie zadań obliczeniowych, część platformy KASKADA.Przedstawiony został projekt biblioteki, uwzględniający diagram głównych klas oraz diagram sekwencji. Drugi z diagramów ukazuje współpracę głównych klas w procesie przetwarzania strumieni multimedialnych. W dalszej częsci omówione zostały szczegły mechanizmu komunikacji międzyzadawniowej oraz przedstawiony został graf...

  • Parallel processing of multimedia streams

    Rozdział przedstawia platformę KASKADA służącą do przetwarzania strumieni multimedialnych. Został opisany jej projekt: diagramy UML klas i sekwencji obrazujące mechanizmy przetwarzania strumieni, oraz szczegóły komunikacji. Zaprezentowano, również, specjalistyczny framework wspomagający tworzenie i wykonywanie algorytmów, jak również definiowanie scenariuszy usług, wraz z oceną ich użyteczności.

  • Value stream mapping as a tool to improve environmental management system

    Publication

    - Year 2011

  • Real-Time Multimedia Stream data Processing in a Supercomputer Environment

    Publication

    - Year 2012

    Rozdział opisuje doświadczenia uzyskane przez autorów podczas pracy w projekcie MAYDAY EURO 2012. Przedstawiono główny cel projektu - stworzenie systemu umożliwiającego rozwijanie i równolegle wykonywanie usług multimedialnych w środowisku klastra obliczeniowego dużej mocy. opisano tematykę przetwarzania dużej liczby strumieni multimedialnych na komputerach dużej mocy. Następnie zaprezentowano możliwości platformy KASKADA: tworzenie...

  • Value stream mapping as a tool to improve environmental management system

    Publication

    - Year 2011

  • A Model-Driven Solution for Development of Multimedia Stream Processing Applications

    Publication

    This paper presents results of action research related to model-driven solutions in the area of multimedia stream processing. The practical problem to be solved was the need to support application developers who make their multimedia stream processing applications in a supercomputer environment. The solution consists of a domain-specific visual language for composing complex services from simple services called Multimedia Stream...

    Full text to download in external service

  • CONDITIONS, STREAM AND OUTLOOK FOR ECONOMIC MIGRATION FROM ASIA TO POLAND

    Publication

    - Year 2019

    The aim of the article is to present the data about the conditions and perspectives of economic migration from Asia to Poland and data on the stream of this phenomenon in recent years based on work permission documents. The first part presents an introduction on the general migration situation to Poland in recent years and describes the theoretical approach to the aspect of migration. Then the legal conditions of migrants' work...

    Full text to download in external service

  • Design Equation for Stirring Fluid by a Stream Pump in a Circulating Tank

    Publication

    A circulating tank is a very useful theoretical scheme for many fluid-flow objects in several branches of engineering. The motion of the fluid in such objects can be induced in different ways. A stream pump provides an especially interesting possibility; however, the quantitative description of such devices shows some shortcomings. Such a device is analogous to a jet pump, thus has similar advantages (simplicity of construction,...

    Full text available to download

  • A concept of zero-dimensional and three-dimensional thermodynamic modelling of steam storage in a steam cycle

    Publication

    - Year 2020

    This work presents the thermodynamic model of steam storage in a steam cycle. The innovative steam storage is an integral part of the unit and thus responds quickly to changes in load. This enhances the primary control reserve while maintaining high efficiency of energy conversion. With regard to power plants, it improves the operational safety of generation units, as it prevents boiler and turbines overload in the case of steep...

    Full text to download in external service

  • Ensemble Classifier for Mining Data Streams

    Publication

    - Procedia Computer Science - Year 2014

    Full text to download in external service

  • Further developments of parameterization methods of audio stream analysis for secuirty purposes

    Publication

    - Year 2009

    The paper presents an automatic sound recognition algorithm intended for application in an audiovisual security monitoring system. A distributed character of security systems does not allow for simultaneous observation of multiple multimedia streams, thus an automatic recognition algorithm must be introduced. In the paper, a module for the parameterization and automatic detection of audio events is described. The spectral analyses...

  • Performance Evaluation of the Parallel Codebook Algorithm for Background Subtraction in Video Stream

    A background subtraction algorithm based on the codebook approach was implemented on a multi-core processor in a parallel form, using the OpenMP system. The aim of the experiments was to evaluate performance of the multithreaded algorithm in processing video streams recorded from monitoring cameras, depending on a number of computer cores used, method of task scheduling, image resolution and degree of image content variability....

    Full text to download in external service

  • Prediction of Processor Utilization for Real-Time Multimedia Stream Processing Tasks

    Publication

    Utilization of MPUs in a computing cluster node for multimedia stream processing is considered. Non-linear increase of processor utilization is described and a related class of algorithms for multimedia real-time processing tasks is defined. For such conditions, experiments measuring the processor utilization and output data loss were proposed and their results presented. A new formula for prediction of utilization was proposed...

  • Human verbal memory encoding is hierarchically distributed in a continuous processing stream

    Publication
    • M. T. Kucewicz
    • K. Saboo
    • B. M. Berry
    • V. Kremen
    • L. R. Miller
    • F. Khadjevand
    • C. S. Inman
    • P. A. Wanda
    • M. R. Sperling
    • R. Gorniak... and 8 others

    - eNeuro - Year 2019

    Processing of memory is supported by coordinated activity in a network of sensory, association, and motor brain regions. It remains a major challenge to determine where memory is encoded for later retrieval. Here we used direct intracranial brain recordings from epilepsy patients performing free recall tasks to determine the temporal pattern and anatomical distribution of verbal memory encoding across the entire human cortex. High...

    Full text available to download

  • A Computational Analysis of the Aerodynamic and Aeromechanical Behavior of a Thermo-Well for Steam Temperature Measurement in a Steam Turbine

    Publication
    • M. Banaszkiewicz
    • J. Badur
    • S. Kornet
    • D. Sławiński
    • B. Kraszewski
    • P. Ziółkowski
    • A. Rehmus-Forc
    • G. Bzymek

    - HEAT TRANSFER ENGINEERING - Year 2023

    The goal of the paper is twofold: firstly, it presents computational fluid dynamics analysis for finding maximum unsteady flow forces (and their frequencies) acting on a thermo-well for measuring steam temperature in a steam turbine control stage and secondly, it presents computational solid dynamics analysis of possibility of entry into resonance of the thermowell structure. There have been analyzed two cases of flow with changing...

    Full text to download in external service

  • Gas-steam mixture wood drying

    Publication

    Badania skuteczności suszenia wysokotemperaturowego suszenia drewna w komorze suszarniczej - wstępne wyniki.

  • TERMODYNAMIC CALCULATIONS OF TURBINE STEAM PARAMETERS

    In this work a heat balance was made for the nominal conditions of a block working with 18K370 turbine. For the parameters obtained, the thermal-flow calculations of the steam turbine were performed, maintaining the actual geometry of its flow system. Based on the nominal values obtained, iterative thermal and flow calculations were made for both the heat cycle of the power plant block and the steam turbine itself, seeking to obtain...

  • Neural simulator of steam power unit.

    Publication

    - Year 2004

    Zbadano możliwości zbudowania neuronowego symulatora turbinowego bloku energetycznego. Zamodelowano ten obieg i sprawdzono konfiguracje sztucznych sieci neuronowych (SSN) zapewniające dużą dokładność symulatora neuronowego. Zwrócono uwagę na problemy dotyczące węzłów siłowni, w których następuje mieszanie się strumieni czynnika o zróżnicowanych parametrach cieplno-przepływowych. Wskazano na zastosowanie takiego symulatora w diagnostyce.

  • Simulation model for evaluation of packet sequence changed order of stream in DiffServ network

    Publication

    Current 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...

    Full text to download in external service

  • Evaluation of Multimedia Stream Processing Modeling Language from the Perspective of Cognitive Dimensions

    Publication

    W referacie zawarto opis zastosowania wymiarów poznawczych do oceny języka modelowania przetwarzania strumieni multimedialnych, nazwanego MSP-ML, w trakcie tworzenia tego języka. Poszczególne części referatu prezentują kontekst i motywacje oceny MSP-ML, metodę oceny, rezultaty oceny oraz porównanie rezultatów oceny z wynikami otrzymanymi za pomocą innych metod oceny języków modelowania wizualnego.

    Full text to download in external service

  • Resolving Conflicts in Object Tracking in Video Stream Employing Key Point Matching

    Publication

    - Year 2012

    A novel approach to resolving ambiguous situations in object tracking in video streams is presented. The proposed method combines standard tracking technique employing Kalman filters with global feature matching method. Object detection is performed using a background subtraction algorithm, then Kalman filters are used for object tracking. At the same time, SURF key points are detected only in image sections identified as moving...

    Full text to download in external service

  • Metrisable assessment of the course of stream‑systemic processes in vector form in industry 4.0

    Publication

    The goal of this paper is to present an innovative conception how to use metrisable vector structure of a manufacturing process, based on quantitative relations between the activity of input streams, features of the product, and effect of losses; all of which are excellent practical solution for Industry 4.0, and in turn intelligent factories. This solution can be a usefull way in the process of building sustainable organization....

    Full text available to download

  • Drought stress memory and subsequent drought stress tolerance in plants

    Publication
    • Ł. Wojtyla
    • E. Paluch-Lubawa
    • E. Sobieszczuk-Nowicka
    • M. Garnczarska

    - Year 2020

    Full text to download in external service

  • Comprehensive thermodynamic analysis of steam storage in a steam cycle in a different regime of work: A zero-dimensional and three-dimensional approach

    Due to the current trends aiming to reduce carbon dioxide emissions by increasing the use of renewable energy sources, changes are required in the operation of coal-fired steam units. The unstable nature of renewable energy sources, depending on weather conditions, means that the amount of energy produced varies and is not always in line with peak demand. To ensure the security and stability of energy supplies in the energy system,...

    Full text available to download

  • Reversible Video Stream Anonymization for Video Surveillance Systems Based on Pixels Relocation and Watermarking

    Publication

    A method of reversible video image regions of interest anonymization for applications in video surveillance systems is described. A short introduction to theanonymization procedures is presented together with the explanation of its relation to visual surveillance. A short review of state of the art of sensitive data protection in media is included. An approach to reversible Region of Interest (ROI) hiding in video is presented,...

    Full text to download in external service

  • Bacterial community succession in an Arctic lake–stream system (Brattegg Valley, SW Spitsbergen)

    Publication

    - BOREAL ENVIRONMENT RESEARCH - Year 2016

    The factors affecting prokaryotic and virus structure dynamics and bacterial commu-nity composition (BCC) in aquatic habitats along a ca. 1500 m of the Brattegg Valley lake–stream system (SW Spitsbergen) composed of three postglacial lakes created by Brattegg Glacier meltwater were examined. A high number of small-volume prokaryotic cells were found in the recently-formed, deep, upper,...

    Full text available to download

  • Change in Heavy Metals Concentrations in Sediments Deposited in Retention Tanks in a Stream after a Flood

    Our paper presents the results of heavy metal (HM) (Zn, Cu, Pb, Cd) content in bottom sediments from retention tanks along Oliwa Stream in Gdańsk, Poland, before a flood (BF) and after a flood (AF) 14-15 July 2016. The flood had a huge impact on the quality of bottom sediments and their displacement. The concentrations of HM differed significantly for research series conducted 3 months BF and 8 months AF. The concentration of Cu...

    Full text available to download

  • Effect of the ionic liquids on extraction of aromatic and sulfur compounds from the model petrochemical stream

    Publication
    • W. Piotr
    • K. Bołoz
    • A. Wiśniewska
    • Z. Dąbrowski
    • D. Kubica
    • J. Łuczak
    • U. Domańska

    - FLUID PHASE EQUILIBRIA - Year 2022

    Suitability of a imidazolium ionic liquids (ILs) as solvents in dearomatization and desulfurization in the ternary systems and in a model multicomponent systems has been analyzed. With this aim, ternary liquid-liquid phase equilibrium data (LLE) have been obtained for ternary mixtures of {IL + benzene, or toluene, or thiophene, or 2-butanethiol + hexane}, or {IL + benzene + 2-methylpentane} at T = 298.15 K and ambient pressure,...

    Full text to download in external service

  • Optimization of steam cycles with respect to supercritical parameters

    Publication

    Artykuł zawiera analizę budowanych aktualnie bloków nadkrytycznych stosowanych na świecie. W pracy przeprowadzono analizę obiegów z pojedynczym oraz podwójnym przegrzewem międzystopniowym dodatkowo z regeneracyjnym podgrzewem wody zasilającej odpowiednio z sześcioma, siedmioma, ośmioma, dziewięcioma oraz dziesięcioma wymiennikami regeneracyjnymi. Obliczenia wykonywano dla różnych wartości temperatur i ciśnienia pary świeżej, różnych...

    Full text available to download

  • Determination of Failure Causes of a Steam Turbine Casing

    Publication

    - Solid State Phenomena - Year 2012

    The paper presents results of research and failure analysis undertaken to determine failure causes of a steam turbine casing. After 130,000 hours of service the crack in a outer shell of the turbine casing was found. The inner shell of the casing was made of cast steel grade G21CrMoV5-7, and the outer shell of grade G20CrMo4-5. Following research were performed in order to determine causes of the casing failure: chemical analysis;...

    Full text to download in external service

  • A novel concept of H2/O2 steam generator

    Publication

    - Year 2016

    This paper presents an idea of hydrogen utilization to steam generation to drive a turbine and produce electricity or to supply a condenser as an element of a heating system. Electrolysis process is considered as a source of hydrogen as well as oxygen. Hydrogen combustion with a stoichiometric ratio of pure oxygen produces steam at very high temperature. Steam temperature can be controlled by mixing the generated steam with liquid...

  • Modelling of Nuclear Power Plant Steam Turbine

    The paper describes the approach to a Nuclear Power Plant steam turbine modelling which would enable on-line optimal process control (model based) and diagnosis over wide range of operating conditions caused by changing power demand. Presented model is static, multivariable and nonlinear. Such model enables analyzing the heat cogeneration aspects. Developed model is validated and verified by using archive data gained from researches...

    Full text to download in external service

  • A NOVEL CONCEPT OF H2/O2 STEAM GENERATOR

    Publication

    - Instal - Year 2016

    This paper presents an idea of hydrogen utilization to steam generation to drive a turbine and produce electricity or to supply a condenser as an element of heating system. Electrolysis process is considered as a source of hydrogen as well as oxygen. Hydrogen combustion with a stoichiometric ratio of pure oxygen produces steam at very high temperature. Steam temperature can be controlled by mixing the generated steam with liquid...

  • Neural Modelling of Steam Turbine Control Stage

    Publication

    The paper describes possibility of steam turbine control stage neural model creation. It is of great importance because wider application of green energy causes severe conditions for control of energy generation systems operation Results of chosen steam turbine of 200 MW power measurements are applied as an example showing way of neural model creation. They serve as training and testing data of such neural model. Relatively simple...

    Full text to download in external service

  • Proposition of the steam turbine governor structure modification

    Publication

    There is considered the steam turbine governor operation during defense and restoration of the power system. It points out weaknesses of currently used governor structures. The new controller is proposed, that takes advantages of those curently used. The new controller allows for more effective control of the turbine in emergency situations, at frequencies much different from the nominal value.

  • Modelling of Nuclear Power Plant Steam Turbine

    The paper describes the approach to a Nuclear Power Plant steam turbine modelling which would enable on-line optimal process control (model based) and diagnosis over wide range of operating conditions caused by changing power demand. Presented model is static, multivariable and nonlinear. Such model enables analyzing the heat cogeneration aspects. Developed model is validated and verified by using archive data gained from researches...

  • Improvements to the STEAM-based teaching of architectural drawing

    The author of this article presents a systemic approach to improving the teaching of architectural drawing courses for engineers in the 21st Century. In this era of rapid development of digital technologies, the traditional teaching structure should be redefined to a purpose-oriented dynamic model. The existing, generally accepted teaching models have already proved successfully based on the practice-oriented STEAM programme, which...

    Full text available to download