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    Wyświetlanie 1-14 z 14
    Tytuł:
    Dynamic interactions stability analysis of hybrid renewable energy system with SSSC
    Autorzy:
    He, Ping
    Qi, Pan
    Ji, Yuqi
    Li, Zhao
    Powiązania:
    https://bibliotekanauki.pl/articles/1841302.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    damping characteristics
    dynamic interaction analysis
    eigenvalue analysis
    hybrid renewable energy system
    SSSC
    charakterystyka tłumienia
    dynamiczna analiza interakcji
    analiza wartości własnej
    hybrydowy system energii odnawialnej
    Opis:
    The static series synchronous compensator (SSSC) has demonstrated its capability in providing voltage support and improving power system stability. The objective of this paper is to analyze the dynamic interaction stability mechanism of a hybrid renewable energy system connected with doubly-fed induction generators (DFIGs) and solid oxide fuel cell (SOFC) energy with the SSSC. For this purpose, a linearized mathematical model of this modified hybrid single-machine infinite-bus (SMIB) power system is developed to analyze the physical mechanism of the SSSC in suppressing oscillations and the influence on the dynamic stability characteristics of synchronization. Typical impacting factors such as the series compensation level, the SOFC penetration and tie-line power are considered in the SMIB and two-area systems. The impact of dynamic interactions on enhancing damping characteristics and improving transient performance of the studied systems is demonstrated using eigenvalue analysis and dynamic time-domain simulations, which validates the validity of the proposed physical mechanism simultaneously.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 2; 445-462
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of tracking methods in respect of automation of an animal behavioral test
    Autorzy:
    Mazur-Milecka, M.
    Nowakowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/220995.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analysis
    object tracking
    animal social interaction tests
    Opis:
    Automation in experiments carried out on animals is getting more and more important in research. Computers take over laborious and time-consuming activities like recording and analysing images of the experiment scene. The first step in an image analysis is finding and distinguishing between the observed animals and then tracking all objects during the experiment. In this paper four tracking methods are presented. Quantitative and qualitative figures of merit are applied to confront those methods. The comparison takes into consideration the level of correct object recognition during different disturbances, the speed of computation, requirements as to the frame rate and image illumination, quality of recovering from occluded situations and others.
    Źródło:
    Metrology and Measurement Systems; 2011, 18, 1; 91-104
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of candidate genes related to aroma in rice by analyzing the microarray data of highly aromatic and nonaromatic recombinant inbred line bulks
    Autorzy:
    Zinati, Z.
    Delavari, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/80716.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rice
    Oryza sativa
    aroma
    aroma-related gene
    gene ontology enrichment analysis
    microarray analysis
    protein-protein interaction
    protein interaction network
    inbred line
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2019, 100, 3
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Profile irregularities of turned surfaces as a result of machine tool interactions
    Autorzy:
    Boryczko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/220535.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    surface irregularities
    geometrical structure of surface
    machine tool interaction
    spectral analysis
    Opis:
    The paper describes the influence of the machining operation on a surface, which disturbs the projection of the tool profile in the form of its relative movements with respect to the object. The elements of the machine tool undergo constant wear during the machining process, it is therefore important to recognize the effects of their influence on the surface's irregularities. Amplitude-frequency analysis of lateral profiles has been used to evaluate and changes of turned lateral profiles. The results of simulation of radial and axial effects of the machine tool on surface and their spectral components were analyzed. Surfaces obtained in similar machining conditions on lathes operated in various time periods were analyzed spectrally. From the analysis of surface irregularity changes caused by disturbances in movements of the tool against the object, testifying the wear of main machine elements during its operation, the modulated, amplitude-frequency character of changes in surface irregularities of workpiece can be noticed.
    Źródło:
    Metrology and Measurement Systems; 2011, 18, 4; 691-699
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A thermo-hydraulic tool for automatic virtual hazop evaluation
    Autorzy:
    Pugi, L.
    Conti, R.
    Rindi, A.
    Rossin, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/220567.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RT code prototyping
    lube oil console
    rotating machine HazOp analysis
    transient behaviour analysis
    Plant-Control System interaction
    Opis:
    Development of complex lubrication systems in the Oil&Gas industry has reached high levels of competitiveness in terms of requested performances and reliability. In particular, the use of HazOp (acronym of Hazard and Operability) analysis represents a decisive factor to evaluate safety and reliability of plants. The HazOp analysis is a structured and systematic examination of a planned or existing operation in order to identify and evaluate problems that may represent risks to personnel or equipment. In particular, P&ID schemes (acronym of Piping and Instrument Diagram according to regulation in force ISO 14617) are used to evaluate the design of the plant in order to increase its safety and reliability in different operating conditions. The use of a simulation tool can drastically increase speed, efficiency and reliability of the design process. In this work, a tool, called TTH lib (acronym of Transient Thermal Hydraulic Library) for the 1-D simulation of thermal hydraulic plants is presented. The proposed tool is applied to the analysis of safety relevant components of compressor and pumping units, such as lubrication circuits. Opposed to the known commercial products, TTH lib has been customized in order to ease simulation of complex interactions with digital logic components and plant controllers including their sensors and measurement systems. In particular, the proposed tool is optimized for fixed step execution and fast prototyping of Real Time code both for testing and production purposes. TTH lib can be used as a standard SimScape-Simulink library of components optimized and specifically designed in accordance with the P&ID definitions. Finally, an automatic code generation procedure has been developed, so TTH simulation models can be directly assembled from the P&ID schemes and technical documentation including detailed informations of sensor and measurement system.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 4; 631-648
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Body weight of high and low aggression mice under various population densities
    Autorzy:
    Oikawa, T
    Kawamoto, Y.
    Nakamura, S.
    Morimasa, T.
    Sato, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043138.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    population density
    statistical analysis
    mice
    aggressive behaviour
    sex
    animal
    growth
    mouse
    phenotypic mean
    genotype
    environment interaction
    body weight
    heterogeneity
    aggression
    Źródło:
    Journal of Applied Genetics; 2000, 41, 1; 35-42
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigating the factor of safety for the design of columns using properties of steel rebarsmanufactured in Pakistan
    Autorzy:
    Abbas Zaidi, Safdar
    Arsalan Saeed, Muhannad
    Haider, Farhan
    Powiązania:
    https://bibliotekanauki.pl/articles/230463.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    współczynnik redukcji wytrzymałości
    analiza wytrzymałościowa
    obciążenie momentem
    interakcja
    słup żelbetowy
    strength reduction factor
    strength analysis
    moment load
    interaction
    reinforced concrete column
    Opis:
    This paper includes the behaviour of RC column, using the steel strength data employed by Rafi et al. (2014). Eccentric short columns are studied for this purpose, both tension and compression controlled sections, are analysed considering the current design practice of Pakistan. Three cross sections were analysed using different steel percentages against load-moment interaction and the strength analyses. Concrete strength is also varied in this analysis. The load moment interaction diagrams were observed in major and minor axes and strength analysis is made for compression controlled and tension controlled sections. In this analysis it is observed that a section designed as a tension controlled is giving brittle failure at certain limit which should be avoided. Considering this scenario, several random cross sections are analysed, strength reduction factors for eccentric and pure axial columns are computed. Conclusions are made on behalf of this analysis for different types of column design.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 3; 191-208
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigating the factor of safety for the design of columns using properties of steel rebar’s manufactured in Pakistan
    Autorzy:
    Zaidi, Safdar Abbas
    Saeed, Muhammad Arsalan
    Haider, Farhan
    Powiązania:
    https://bibliotekanauki.pl/articles/1849760.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    współczynnik redukcji wytrzymałości
    analiza wytrzymałościowa
    interakcja
    moment obciążenia
    pręt stalowy
    słup
    strength reduction factor
    strength analysis
    load moment
    interaction
    steel rebar
    column
    Opis:
    This paper includes the behaviour of RC column, using the steel strength data employed by Rafi et al. (2014). Eccentric short columns are studied for this purpose, both tension and compression controlled sections, are analysed considering the current design practice of Pakistan. Three cross sections were analysed using different steel percentages against load-moment interaction and the strength analyses. Concrete strength is also varied in this analysis. The load moment interaction diagrams were observed in major and minor axes and strength analysis is made for compression controlled and tension controlled sections. In this analysis it is observed that a section designed as a tension controlled is giving brittle failure at certain limit which should be avoided. Considering this scenario, several random cross sections are analysed, strength reduction factors for eccentric and pure axial columns are computed. Conclusions are made on behalf of this analysis for different types of column design.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 4; 61-78
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is the recently discovered EDA gene associated with anhidrotic ectodermal dysplasia?
    Autorzy:
    Kobielak, K
    Kobielak, A
    Trzeciak, W H
    Powiązania:
    https://bibliotekanauki.pl/articles/2046683.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ectodermal-mesodermal interaction
    X chromosome
    submicroscopic deletion
    hyperthermia
    Christ-Siemens-Touraine syndrome
    hybridization
    ectodermal dysplasia
    mutation
    somatic cell
    linkage analysis
    embryonic life
    transmembrane receptor
    Opis:
    The evidence from literature strongly suggests that Christ-Siemens-Touraine (CST) syndrome is associated with mutations of the newly discovered EDA gene. The gene is situated on the long arm of the X chromosome (Xq12.2-q13.1) and contains two exons separated by a 200 kbp intron. The 5’-untranslated region and most of the coding sequence are localized in exon 1, while three C-terminal amino acids are encoded by exon 2. The coding sequence was interrupted by translocations in three affected females: t(X;l), t(X;12), t(X;9), and submicroscopic deletions of the EDA gene were found in five males with CST syndrome, and point mutations were discovered in exon 1 in nine other patients. Northern blot analysis and in situ hybridization studies revealed that the EDA gene was expressed in the foetus, and postnatally in a specific type of skin cell and that the expression was limited to cells of ectodermal origin. A predicted protein product of the EDA gene contains 135 to 140 amino acids, organized in three distinct domains and may belong to class II transmembrane receptors.
    Źródło:
    Journal of Applied Genetics; 1997, 38, 3; 343-357
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite element modeling of composite concrete-steel columns
    Numeryczne modelowanie zespolonych słupów stalowo-betonowych
    Autorzy:
    Kwaśniewski, L.
    Szmigiera, E.
    Siennicki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/230728.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    kolumna stalowo-betonowa
    kolumna kompozytowa
    modelowanie numeryczne
    analiza elementów skończonych
    imperfekcja
    interakcja
    concrete-steel column
    composite column
    numerical modelling
    finite element analysis
    imperfection
    interaction
    Opis:
    This paper presents the numerical part of the research program on concrete-filled steel columns. Nonlinear, three dimensional FE analysis of axial compression, was conducted using the finite element program ABAQUS. The numerical results were validated through comparison with experimental data in terms of ultimate loading and deformation modes. Modeling related problems such as the definition of boundary conditions, imperfections, concrete-steel interaction, material representation and others are investigated using a comprehensive parametric study. The developed FE models will be used for an enhanced interpretation of experiments and for the predictive study of cases not included in the experimental testing.
    W artykule przedstawiono numeryczną część programu badań słupów stalowych wypełnionych betonem. Przeprowadzono nieliniową, trójwymiarową analizę FE ściskania osiowego, za pomocą programu ABAQUS. Numeryczne wyniki zostały zwalidowane przez porównanie z danymi doświadczalnymi w zakresie obciążenia granicznego i typu odkształcenia. Za pomocą kompleksowych studiów parametrycznych badano zagadnienia związane z modelowaniem takich parametrów jak określenie warunków brzegowych, imperfekcji, interakcji miedzy betonem a stalą, odwzorowaniem materiałów. Opracowane modele FE zostaną wykorzystane do udoskonalenia interpretacji eksperymentów i przewidywania wyników dla przypadków niebadanych doświadczalnie.
    Źródło:
    Archives of Civil Engineering; 2011, 57, 4; 373-388
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the structural response of Beirut port concrete silos under blast loading
    Autorzy:
    Ismail, Sahar Ali
    Raphael, Wassim
    Durand, Emmanuel
    Kaddah, Fouad
    Geara, Fadi
    Powiązania:
    https://bibliotekanauki.pl/articles/1852380.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    obciążenie wybuchem
    uszkodzenie
    analiza elementów skończonych
    interakcja grunt-konstrukcja-fundament
    silos betonowy
    blast loading
    failure
    finite element analysis
    soil-structure-foundation interaction
    concrete silo
    Opis:
    Several months after August 4, 2020, Lebanon is still recovering from the enormous explosion at the port of Beirut that killed more than 200 people and injured more than 7500. This explosion ripped the city to shreds and significantly damaged the Beirut port silos. Saint Joseph University of Beirut “the school of engineering ESIB” in collaboration with “Amann” Engineering performed a 3D scan of the Beirut port silos to assess the silos’ level of damage. The obtained data was then compared to the numerical modelling results, obtained from Abaqus explicit, in order to estimate the blast magnitude and to check if the pile foundation can be reused in building new silos at the same place due to the limited space available at the port of Beirut while considering the soil-foundation-structure interaction effect. In addition, the silos’ structural response against the filling of the silos at the time of explosion was investigated. The displacement of the silos and the amount of silos’ damage obtained from the fixed and flexible numerical models indicate that a blast magnitude of 0.44 kt TNT (approximately 1100 tons of Ammonium Nitrate) best estimates the 20 to 30 cm silos’ tilting in the direction of the blast. In addition, the soil and the foundation played a positive role by absorbing part while dissipating less amount of the blast energy. Also, the grains at the time of the event did not affect the silos’ deformation and damage amount. Noting that the displacement of the pile foundation exceeded all limits set by design codes, indicating that the pile foundation cannot be reused to build new silos at the same place.
    Źródło:
    Archives of Civil Engineering; 2021, 67, 3; 619-638
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic Power Radiated by a System of Two Vibrating Circular Membranes Located at the Boundary of Three-Wall Corner Spatial Region
    Autorzy:
    Szemela, K.
    Rdzanek, W. P.
    Rdzanek, W. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/176658.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    three-wall corner region
    Green function
    Neumann boundary value problem
    modal analysis
    asymmetric vibrations
    vibration of an excited circular membrane
    acoustic power
    mutual interaction of sound sources
    Opis:
    Two vibrating circular membranes radiate acoustic waves into the region bounded by three infinite baffles arranged perpendicularly to one another. The Neumann boundary value problem has been inves- tigated in the case when both sources are embedded in the same baffle. The analyzed processes are time harmonic. The membranes vibrate asymmetrically. External excitations of different surface distributions and different phases have been applied to the sound sources’ surfaces. The influence of the radiated acoustic waves on the membranes’ vibrations has been included. The acoustic power of the sound sources system has been calculated by using a complete eigenfunctions system.
    Źródło:
    Archives of Acoustics; 2012, 37, 4; 463-473
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mimicking speaker’s lip movement on a 3D head model using cosine function fitting
    Autorzy:
    Lüsi, I.
    Anbarjafari, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/199798.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    3D lip movement modelling
    mathematical modelling
    depth information analysis
    cosine function fitting
    human-computer interaction
    modelowanie ruchu warg 3D
    modelowanie matematyczne
    funkcja cosinus
    interakcja człowiek-komputer
    Opis:
    Real-time mimicking of human facial movement on a 3D head model is a challenge which has attracted attention of many researchers. In this research work we propose a new method for enhancing the capturing of the shape of lips. We present an automatic lip movement tracking method which employs a cosine function to interpolate between extracted lip features in order to make the detection more accurate. In order to test the proposed method, mimicking lip movements of a speaker on a 3D head model is studied. Microsoft Kinect II is used in order to capture videos and both RGB and depth information are used to locate the mouth of a speaker followed by fitting a cosine function in order to track the changes of the features extracted from the lips.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 5; 733-739
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Traffic analysis and pavement technology as a tool for urban noise control
    Analiza ruchu i technologia nawierzchni jako narzędzie umożliwiające ograniczenie hałasu drogowego
    Autorzy:
    Kowalski, K. J.
    Brzeziński, A. J.
    Król, J. B.
    Radziszewski, P.
    Szymański, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/230675.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hałas komunikacyjny
    modelowanie ruchu
    analiza ruchu
    prognozowanie ruchu
    organizacja ruchu
    środowisko
    nawierzchnia asfaltowa
    interakcja opona-nawierzchnia
    technologia
    traffic noise
    traffic modelling
    traffic analysis
    traffic forecast
    road traffic organization
    environment
    asphalt pavement
    tire-pavement interaction
    technology
    Opis:
    Traffic related noise is currently considered as an environmental pollution. Paper presents results of multidirectional study attempting to serve urban traffic without the need to erect noise barriers interfering urban space. Initial concept of the road expansion included construction of 1000 m of noise barriers dividing city space. Improvement in the acoustic conditions after construction completion is possible due to the applied noise protection measures: vehicle speed limit, smooth of traffic flow, use of road pavement of reduced noise emission and the technical improvement of the tramway.
    Budowa ciągów komunikacyjnych na terenie miejskim, w tym jezdni samochodowych i torowisk tramwajowych, związana jest z koniecznością spełnienia wielu dodatkowych wymagań związanych z bezpieczeństwem, organizacją ruchu pojazdów i wymaganiami ochrony środowiska. W ostatnich latach w Polsce jak i na całym świecie wzrosły oczekiwania społeczne dotyczące hałasu komunikacyjnego. Zgodnie z tzw. „dyrektywą hałasową” UE (2002/49/EC) hałas klasyfikuje się jako jedno z zanieczyszczeń negatywnie wpływających na środowisko. W Polsce przepisy (m.in. rozporządzenie Ministra Środowiska z 14 czerwca 2007 r. „W sprawie dopuszczalnych poziomów hałasu w środowisku”) początkowo nałożyły wysokie obostrzenia, przyczyniając się do budowy dużej liczby kosztownych ekranów akustycznych. Następnie wymagania w tym względzie złagodzono („Zmieniające rozporządzenie w sprawie dopuszczalnych poziomów hałasu w środowisku” z 1 października 2012 r.) na skutek protestów związanych ze znaczną ingerencją ekranów w krajobraz, ryzykiem zagrożenia bezpieczeństwa ruchu (ograniczanie widoczności) oraz podwyższaniem kosztów inwestycyjnych.
    Źródło:
    Archives of Civil Engineering; 2015, 61, 4; 107-125
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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