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    Wyświetlanie 1-8 z 8
    Tytuł:
    Quantum-inspired method of neural modeling of the day-ahead market of the Polish electricity exchange
    Autorzy:
    Tchórzewski, Jerzy
    Ruciński, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2183468.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    artificial neural networks
    day-ahead market
    dequantization with ANN
    neural modeling
    quantum inspired method
    quantum computing
    Polish Electricity Exchange
    system quantization
    Opis:
    The paper presents selected elements of a modelling methodology involving quantization, quantum calculations and dequantization on the example of the neural model of the Day-Ahead Market of the Polish Electricity Exchange. Based on the fundamental assumptions of quantum computing, a new method has been proposed here of converting the real numbers in decimal notation into quantum mixed numbers using the probability modules of quantum mixed number and the principle of superposition, along with a new method of quantum calculations using linear algebra and vectormatrix calculus, and the Artificial Neural Network was taught accordingly. Dequantization of quantum mixed numbers to real numbers in decimal notation using the new method of dequantization has been proposed as well. The operation of the methods introduced was shown on numerical examples.
    Źródło:
    Control and Cybernetics; 2021, 50, 3; 383--399
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantum-inspired artificil neural networks and evolutionary algorithms methods applied to modeling of the polish electric power exchange using the day-ahead market data
    Autorzy:
    Tchórzewski, J.
    Ruciński, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/94957.pdf
    Data publikacji:
    2018
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    artificial intelligence methods
    MATLAB and Simulink environment
    modeling of business intelligence process
    quantum inspired method
    smart electric power system
    electric power exchange system
    Opis:
    The paper presents selected results of research on the use of artificial intelligence methods, which are inspired by quantum computing solutions for modelling of electric power exchange systems. Methods used in the modelling of quantum data acquisition, quantization and dequantization of information as well as the methods of performing quantum computations were emphasized. Furthermore, we have analysed the results obtained for the neural model and for the evolutionary algorithm inspired by the quantum computer science. Eventually, the model was verified on the example of the neural model of the Electric Power Exchange (EPE).
    Źródło:
    Information Systems in Management; 2018, 7, 3; 201-212
    2084-5537
    2544-1728
    Pojawia się w:
    Information Systems in Management
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The lightfastness and structure of semi-permanent hair dyes, derivatives of o-nitro-N-β-hydroxyethylaniline
    Odporność na działanie światła i budowa barwników typu “semi-permanent”, pochodnych o-nitro-N-β-hydroksyetyloaniliny stosowanych do barwienia włosów
    Autorzy:
    Szuster, Lucjan
    Wojciechowski, Krzysztof
    Rutowicz, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/27324233.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Skórzanego
    Tematy:
    semi-permanent hair dyes
    photochemical degradation
    Hammett equation
    molecular geometry
    AM1 quantum-chemical method
    degradacja fotochemiczna
    równanie Hammetta
    geometria cząsteczki
    metoda kwantowo-chemiczna AM1
    półtrwałe farby do włosów
    Opis:
    The aim of this study was to examine the substituent effects on lightfastness and spectral properties of o-nitro-N-β-hydroxyethylaniline derivatives, used in semi-permanent hair dyes of HC (Hair Color-Dyes ) type. It has been found that the fading rate of the color of hair dyed depends on the nature of the ED and EA substituents in the o-nitro-N-β-hydroxyethylaniline. The o-nitro-N-β-hydroxyethyl aniline derivatives undergo discoloration according to kinetics of the first order reaction. A negative value of the slope coefficient indicates the oxidative mechanism of the reaction. From the relationship lmax=f(σ) σp─Hammett’s constant were calculated. Using the semi-empirical AM1 quantum chemical method, we calculated the structures of hair dyes The dye structures were optimized using MM +, DM, and AM1.
    Celem pracy było zbadanie wpływu podstawników na działanie światła i właściwości spektralne pochodnych o-nitro-N-β-hydroksyetyloaniliny, stosowanych w półtrwałych farbach (semi-permanent) do barwienia włosów. Stwierdzono, że szybkość zaniku barwy włosów zależy od charakteru podstawników ED i EA w o-nitro-N-β-hydroksyetyloanilinie. Pochodne o-nitro-N-β-hydroksyetyloaniliny ulegają odbarwieniu zgodnie z kinetyką reakcji 1-go rzędu. Ujemna wartość współczynnika nachylenia wskazuje na mechanizm utleniający reakcji. Z zależności lmax=f(σ) obliczono stałe σp─Hammetta. Stosując półempiryczną metodę kwantowo-chemiczną AM1, obliczyliśmy budowę barwników pochodnych N-β-hydroksyetyloamino-nitrobenzenu. Struktury barwników optymalizowano przy użyciu MM +, DM oraz AM1. półtrwałe farby do włosów.
    Źródło:
    Technologia i Jakość Wyrobów; 2023, 68; 19--37
    2299-7989
    Pojawia się w:
    Technologia i Jakość Wyrobów
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Susceptibility of Coupled Double GaAs Quantum Dot in Magnetic Fields
    Autorzy:
    Elsaid, M.
    Hijaz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032348.pdf
    Data publikacji:
    2017-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    magnetic susceptibility
    variational method
    exact diagonalization
    double quantum dots
    Opis:
    We calculate the magnetic susceptibility of two interacting electrons confined in a coupled double quantum dot presented in a magnetic field by solving the relative Hamiltonian using the combined variational and exact diagonalization methods. We have investigated the dependence of the magnetic susceptibility on temperature, magnetic field strength, confining frequency, and barrier height. The singlet-triplet transitions in the ground state of the quantum dot spectra and the corresponding jumps in the magnetic susceptibility curves have been shown. The comparisons show that our results are in very good agreement with reported works.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 6; 1491-1496
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some Physical Properties of Copper Oxide Thin Films Prepared by Electrolysis Method
    Autorzy:
    Oudah, Mustafa H.
    Mazin, H. Hasan
    Abd, Ahmed N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065248.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    copper oxide
    drop-casting method
    electrolysis
    quantum size effect
    thin films
    Opis:
    The aim of this paper is to study the properties of copper oxide thin films prepared by electrolysis method and deposited on glass substrates by drop-casting method at different annealing temperatures. Copper oxide colloidal was successfully prepared by electrolysis method. The X-ray diffraction confirms the polycrystalline structure of the films. Atomic force microscopy shows that the increase in the annealing temperature improves the surface morphology, increases the grain size and removes the cracks. The best optical transmittance was for the film annealed at 200 ºC. The bandgap decreases from 3.35 eV to 3.15 eV as a result of increasing the annealing temperature. The wide bandgap that obtained in this study is due to quantum size effect.
    Źródło:
    World Scientific News; 2019, 135; 59-70
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic structures of CdSe quantum dots embedded in ZnSe
    Autorzy:
    Jayawardhana, M. R. P. I.
    Wijewardena Gamalath, K. A. I. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178287.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    LCAO method
    Quantum dot
    Sparse matrices
    adjacency matrix
    folded spectrum method
    optical matrix elements
    strain effects
    valence band offset
    Opis:
    The electronic structures and optical matrix elements of CdSe semiconductor quantum dots of near cubical, hemispherical and cylindrical shape embedded in ZnSe were calculated. Bulk Hamiltonian matrices were obtained using the empirical tight binding method including spin-orbital coupling and relativistic effects. All quantum dots were simulated in reciprocal space and the number of atoms in each quantum dot was kept nearly equal for the comparison purpose. An adjacency matrix was produced which indicates the adjacencies of unit cells and the bulk Hamiltonian was included for each adjacency point in order to obtain the quantum dot Hamiltonians. The strain effects, valence band offset and spin orbital coupling were included in the calculations. The quantum dot Hamiltonian was solved to obtain the highest and lowest eigenvalues from which the electronic structure was obtained. Then eigenvalues near integers ranging from the lowest eigenvalue to highest eigenvalue was generated for the point.
    Źródło:
    World Scientific News; 2017, 86, 3; 205-225
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new design of scanning IR detectors
    Autorzy:
    Dvoretsky, Sergey A.
    Kovchavtsev, Anatoly P.
    Lee, Irlam I.
    Polovinkin, Vladimir G.
    Sidorov, Georgiy Yu.
    Yakushev, Maxim V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818248.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    scanning IR detector
    photosensitive element
    Monte Carlo method
    local quantum efficiency
    point radiation source
    Opis:
    Photoelectrical characteristics of scanning IR detectors with implemented time delay and integration mode are analyzed. A new “shifted cellular” layout of photosensitive elements in the FPA structure is proposed. Advantages of the new FPA configuration in terms of threshold sensitivity for small-size/point objects are demonstrated. The analysis is based on the Monte Carlo simulation of the diffusion process of photogenerated minority charge carriers in the photosensitive layer photodiode arrays. The analysis is performed taking into account the main photoelectric parameters of FPA elements: photosensitive layer thickness, diffusion length of charge carriers, optical absorption length, their design parameters: geometric sizes of FPA elements, diameters of p-n junctions, and design parameters of the optical system: optical-spot diameter.
    Źródło:
    Opto-Electronics Review; 2020, 28, 2; 93--98
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of the portion of functional PS2 reaction centres in the light of a fluorometric study
    Autorzy:
    Ficek, D.
    Ostrowska, M.
    Kuzio, M.
    Pogosyan, S.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/48365.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    marine phytoplankton
    variability
    quantum yield
    chlorophyll a
    optical depth
    PS2 reaction
    environmental factor
    photosynthetic apparatus
    sea
    fluorometric method
    light
    photosynthesis
    Opis:
    The paper contains a preliminary analysis of the links between the portion fc of functional PS2 reaction centres in the photosynthetic apparatus of marine phytoplankton and environmental factors. The analysis is based inter alia on fluorometric measurements of fc (see Kolber & Falkowski 1993) in water sampled from different depths and trophic types of sea. From the statistical generalisations was derived an analytical form of the relationship between fc, and the optical depth and trophic type of sea (the trophicity index was taken to be the surface concentration of chlorophyll a). According to this relationship, fc rises as the trophicity of the sea does so. Moreover, there is a certain optimal optical depth for each type of water at which the number of functional PS2 reaction centres reaches a maximum. Above or below this depth the value of fc falls. At the present stage of investigations it seems reasonable to assume that this drop in the number of functional PS2 reaction centres close to the surface is due to the destructive effect of excessive irradiance. On the other hand, their reduced number at greater depths, below the fc maximum, can be attributed to the deficit of light and the consequent destruction of reaction centres.
    Źródło:
    Oceanologia; 2000, 42, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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