Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "hybrid performance" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-55 z 55
    Tytuł:
    Relationships between hybrid performance and genetic distance revealed by morphological and AFLP marker in cucumber
    Autorzy:
    Olfati, J. A.
    Samizadeh, H.
    Peyvast, Gh.
    Rabiei, B.
    Khodaparast, S. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2199652.pdf
    Data publikacji:
    2012-04-19
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    cluster analysis
    diallel
    heterosis
    orthogonal comparison
    similarity matrix
    Opis:
    This study investigated the relationship of morphological and molecular genetic distance with hybrid performance and heterosis in cucumber in an attempt to make use of genetic distance in predicting hybrid performance. The results of this study showed that GD, in general, correlated poorly with heterosis and SCA. Results showed that the mean values of the hybrids were significantly larger or smaller for many traits when compared with the mean of parental lines, indicating that heterosis was present for these traits. In next step we compare inter group hybrids versus intra group hybrids. This test showed that intra group hybridization although increased the yield and yield component but decrease some fruit quality such as fruit color and shape.
    Źródło:
    Plant Breeding and Seed Science; 2012, 65; 87-98
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie genetyczne linii wsobnych kukurydzy a plonowanie odmian mieszańcowych
    Genetic distance among inbred lines of maize and its association with hybrid performance
    Autorzy:
    Rogacki, Janusz
    Bulińska-Radomska, Zofia
    Dzienkiewicz, Jakub
    Adamaczyk, Józef
    Cygert, Henryk
    Powiązania:
    https://bibliotekanauki.pl/articles/42821662.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    markery molekularne
    plon mieszańców
    Zea mays L.
    hybrid performance
    molecular markers,
    Opis:
    Celem pracy była ocena zróżnicowania genetycznego 10 linii wsobnych o ziarnie zębokształtnym (dent) i 7 linii o ziarnie szklistym (flint) kukurydzy w relacji do plonowania 70 mieszańców eksperymentalnych powstałych w wyniku czynnikowego układu krzyżowania „dent × flint”. Do oceny zróżnicowania genetycznego 17 linii wsobnych kukurydzy użyto markerów RAPD generowanych w oparciu o technikę PCR. Do powielania znaczników (markerów) wykorzystano 12 semi-specyficznych 18.-nukleotydowych starterów. Wyliczenie wartości współczynnika dystansu genetycznego Nei’a pomiędzy poszczególnymi badanymi liniami zostało przeprowadzone w oparciu o 404 polimorficzne fragmenty DNA. Wartości współczynników dystansu genetycznego wyliczono wg metody Nei & Li (1979). Większość wykorzystanych starterów generowała obrazy z wysokim udziałem fragmentów polimorficznych. Wartości współczynników dystansu genetycznego uzyskane dla par linii były stosunkowo wysokie i zawierały się w przedziale od 0,29 do 0,72. Analiza skupień przeprowadzona metodą średnich połączeń (UPGMA) wartości współczynników dystansu genetycznego dała podstawę do wyodrębnienia trzech różniących się między sobą grup linii kukurydzy; dwóch w obrębie linii o ziarnie zębokształtnym oraz jednej wspólnej dla linii szklistych. Średnia wartość współczynnika dystansu genetycznego w obrębie linii zębokształtnych wyniosła 0,56, natomiast w obrębie linii szklistych 0,46. Regresja plonów 70 mieszańców (dent × flint) względem dystansu genetycznego linii rodzicielskich tworzących ich formuły, wskazuje na bardzo słaby związek obu cech. Reasumując, przedstawiona metoda jest bardziej przydatna do poprawnego zaszeregowania linii do właściwej grupy heterotycznej niż do prognozowania wysokości plonu ziarna mieszańca na podstawie dystansu genetycznego pomiędzy liniami rodzicielskimi.
    The main objective of the present study was to evaluate the genetic diversity of 17 (10 dent and 7 flint) inbred lines of maize in relation to yield performance of 70 hybrids produced according to North Carolina II design “dent × flint”. To assess genetic divergence among 17 inbred lines, random amplified polymorphic DNA (RAPD) molecular markers were used. Twelve different, primers consisting of 18 nucleotides were used to produce a total of 404 reproducible amplification DNA fragments, the majority of which were polymorphic. The values of genetic distance were calculated according to Nei & Li method (1979). The genetic distance among pairs of inbred lines ranged from 0.29 to 0.72. A dendrogram was constructed by an unweighted pair-group method using arithmetic averages (UPGMA). Cluster analysis divided the inbred lines into three groups: one including the flint lines only, and two groups composed of the dent type lines. The average value of genetic distance for pair comparison between the dent lines was higher (GD = 0.56) than that for the flint lines (GD = 0.46). Regression of hybrids grain yield on a genetic distance of their parental inbred lines showed very low correlation. The method used in this research is useful to allocate lines into a heterotic group rather than predict hybrid yield performance.
    Źródło:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2009, 253; 231-243
    0373-7837
    2657-8913
    Pojawia się w:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High Performance Hybrid Silicon Evanescent Traveling Wave Electroabsorption Modulators
    Autorzy:
    Abedi, K.
    Afrouz, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399960.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    85.35.Be
    Opis:
    In this paper, for the first time, a high performance hybrid silicon evanescent traveling wave electroabsorption modulator based on asymmetric intra-step-barrier coupled double strained quantum wells active layer is introduced which has double steps at III/V mesa structure. Through this active layer, hybrid silicon evanescent traveling wave electroabsorption modulator will be advantages such as very low insertion loss, zero chirp, high extinction ratio, and large Stark shift and better figures of merit as compared with multiquantum well and intra-step quantum well structures. Furthermore, traveling wave electroabsorption modulator with double steps III/V mesa structure results in a wider bandwidth as compared with one-step III/V mesa and mushroom structures. For the modulator with double steps III/V mesa structure with a 200 μm length, the 3 dB bandwidths are obtained as 132 and 52 GHz for 25 and 40 Ω characteristic impedances, respectively.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 415-417
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid modelling and performance evaluation of switched discrete-event systems
    Autorzy:
    Wang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/970351.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    układ zespolony
    układ komutowany
    modelowanie hybrydowe
    zachowanie okresowe
    ocena działania systemu
    complex systems
    switched systems
    discrete event systems
    max-plus algebra
    hybrid modelling
    periodic behavior
    performance evaluation
    Opis:
    Motivated by the integrated complexity of real-time intelligent control and optimization of industrial/manufacturing processes, this paper discusses hybrid modelling and asymptotic periodic behavior of a class of switched discrete event systems, and shows how to evaluate the asymptotic performance/efficiency of such systems. We prove that, under some mild conditions, the switched discrete event system will achieve asymptotic periodic dynamics, and its performance/efficiency can be evaluated by calculating the eigenvalue of certain matrix in max-plus algebra. Illustrative examples are provided.
    Źródło:
    Control and Cybernetics; 2004, 33, 2; 311-321
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance of Hybrid Sensing Method in Environment with Noise Uncertainty
    Autorzy:
    Kustra, M.
    Kosmowski, K.
    Suchański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/308868.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    Covariance Absolute Value
    Cyclic Autocorrelation Function
    hybrid detector
    noise uncertainty
    OFDM
    SNR wall
    WiMAX
    Opis:
    The paper presents a novel hybrid spectrum sensing method used in cognitive radio and presents a hybrid detector (HD) which improves the sensing performance. The proposed HD takes advantage of the energy detection (ED) principle and a method based on Covariance Absolute Value (CAV), as well as on Cyclic Autocorrelation Function (CAF). The paper shows the limitations of using ED, resulting from the uncertainty of spectral density of noise power estimation, known as the SNR wall. The paper describes a system model and presents simulation results for the OFDM signal of a WiMAX-based communications system. The simulation results refer to an ideal environment with well-known parameters, and to an environment with uncertain spectral density of noise power estimation.
    Źródło:
    Journal of Telecommunications and Information Technology; 2018, 1; 51-57
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Performance of Hybrid Constructed Wetland System for Treating the Batik Wastewater
    Autorzy:
    Rahmadyanti, Erina
    Audina, Oktavia
    Powiązania:
    https://bibliotekanauki.pl/articles/123253.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    batik industry
    wastewater
    hybrid constructed wetland
    Canna indica
    Opis:
    The batik industry is one of the Indonesian economic drivers. However, most of the batik industries discharge their wastewater without any prior treatment, thus endangering the environment. This research aims to investigate the ability of hybrid constructed wetlands (CWs) system using Canna indica in the batik wastewater treatment. The parameters studied were chemical oxygen demand (COD), total suspended solid (TSS), and oil and grease (FOG) with 3, 5, and 7 days of hydraulic retention time (HRT). The results indicate that the hybrid constructed wetland system using Canna indica optimally gains the COD and FOG removal efficiency on day 3 at 89.61% and 89.53%, while the TSS removal efficiency on day 5 at 98.74%. Despite the high removal efficiency, the effluent parameters remain below the standards for direct discharge into waterbodies. Therefore, further research is needed to investigate the appropriate pre-/advanced treatment to be combined with the hybrid constructed wetland in batik wastewater treatment.
    Źródło:
    Journal of Ecological Engineering; 2020, 21, 3; 94-103
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flexural performance of hybrid fiber reinforced cement-based materials incorporating ceramic wastes
    Autorzy:
    Wu, Lipeng
    Li, Xuanhao
    Deng, Hai
    Powiązania:
    https://bibliotekanauki.pl/articles/27312153.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    materiał cementowy
    odpad ceramiczny
    wydajność mechaniczna
    włókno polialkoholu winylowego
    włókno stalowe
    cement based material
    ceramic waste
    mechanical performance
    polyvinyl alcohol fiber
    steel fiber
    Opis:
    Ceramic waste generated by demolition and manufacturing processes is a kind of widely discharged solid waste; its sustainable use can reduce resource extraction, energy consumption, and carbon emissions, thereby reducing the environmental impact. In this study, ceramic powder and ceramic sand were prepared using waste ceramic wall tiles. By using three water-to-binder ratios of 0.30, 0.32, and 0.34, five ceramic powder replacement rates of 10% to 50%, and completely using ceramic sand as the fine aggregate, specimens with large differences in mechanical properties were prepared. Firstly, the compressive strength was investigated. On this basis, hybrid fibers were employed to strengthen the new matrix material, and its bending resistance was experimentally studied. It was found that the incorporation of ceramic powder reduced the compressive strength of the matrix. The water-binder ratio significantly affects compressive strength at an early age. The effect of PVA fiber on improving the ductility of the new composite is distinct. Increasing the amount of steel fiber can effectively enhance the bending bearing capacity.With a ceramic powder dosage of 50%, the new composite has shown ductile failure characteristics, even with low total fiber content. The bending properties of this new composite material, which makes extensive use of ceramic waste, are well adjustable. The bearing capacity and ductility balance can be achieved with the steel fiber content of 1% and the PVA fiber content of 1.2% to 1.50%.
    Źródło:
    Archives of Civil Engineering; 2023, 69, 3; 491--506
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental performance of a hybrid solar energy saving system in greenhouses
    Autorzy:
    Ntinas, G.
    Kougias, P.
    Nikita-Martzopoulou, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/26431.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    experimental performance
    hybrid
    solar energy
    saving system
    greenhouse
    energy saving
    microclimate
    tomato
    Greece
    crop production
    rural production
    Źródło:
    International Agrophysics; 2011, 25, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance comparison of hybrid electromagnetism-like mechanism algorithms with descent method
    Autorzy:
    Miyajima, H.
    Shigei, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/91563.pdf
    Data publikacji:
    2015
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    electromagnetism-like mechanism
    EM
    meta-heuristcs
    descent method
    BP
    k-means
    FIS
    hybrid EM method
    metaheurystyka
    metoda k-średnich
    metoda hybrydowa EM
    Opis:
    Electromagnetism-like Mechanism (EM) method is known as one of metaheuristics. The basic idea is one that a set of parameters is regarded as charged particles and the strength of particles is corresponding to the value of the objective function for the optimization problem. Starting from any set of initial assignment of parameters, the parameters converge to a value including the optimal or semi-optimal parameter based on EM method. One of its drawbacks is that it takes too much time to the convergence of the parameters like other meta-heuristics. In this paper, we introduce hybrid methods combining EM and the descent method such as BP, k-means and FIS and show the performance comparison among some hybrid methods. As a result, it is shown that the hybrid EM method is superior in learning speed and accuracy to the conventional methods.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2015, 5, 4; 271-282
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increased Performance of a Hybrid Optimizer for Simulation Based Controller Parameterization
    Autorzy:
    Neugebauer, R.
    Hipp, K.
    Hellmich, A.
    Schlegel, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/384707.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    controller parameterization
    simulation based optimization
    particle swarm optimization (PSO)
    Nelder-Mead
    Opis:
    The controller parameterization is often carried out by applying basic empirical formulas within an integrated automatic design. Hence, the determined settings are often insufficiently verified by the resulting system behavior. In this paper an approach for the controller parameterization by using methods of simulation based optimization is presented. This enables the user to define specific restrictions e.g. the complementary sensitivity function (CSF) to influence the dynamic behavior of the control loop. Furthermore it is possible to choose alternative optimization criteria. A main influence factor for practical offline as well as controller internal optimization methods is the execution time, which can be reduced by applying a hybrid optimization strategy. Thus, the paper presents a performance comparison between the straight global Particle-Swarm-Optimization (PSO) algorithm and the combination of the global PSO with the local optimization algorithm of Nelder-Mead (NM) to a hybrid optimizer (HO) based on examples.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 1; 42-45
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance Analysis of Hybrid Phase Shift Keying over Generalized Nakagami Fading Channels
    Autorzy:
    Youssuf, M.
    Abdelmageed, M. Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/308527.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    bit error rate
    hybrid phase shift keying
    quadrature phase shift keying
    Opis:
    In addition to the benefits of hybrid phase shift keying (HPSK) modulation in reducing the peak to average power ratio of the transmitted signal to reduce the zero cross- ings and the 0?-degree phase transmissions, HPSK enhances the bit error rate (BER) measure of the signal performance. The constellation of the HPSK is analyzed, and an expression for the conditional probability of HPSK modulation over additive white Gaussian noise (AWGN) is derived. This BER measure of HPSK is shown to outperform quadrature phase shift keying (QPSK) modulation. HPSK performance through Nakagami - m fading channel is also considered.
    Źródło:
    Journal of Telecommunications and Information Technology; 2010, 3; 77-82
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance investigation of hybrid photovoltaic thermal-heat with mini-channels for application in electric vehicles
    Autorzy:
    Strąk, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/24200857.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    mini-channels
    numerical simulations
    one-dimensional model
    autonomous car system with PVT
    vehicle battery heat exchanger
    Opis:
    The first autonomous car was developed in the 1980s, but it wasn't until the early 2010s that the technology began to gain significant attention and investment. In 2010, Google began testing self-driving cars on public roads, and since then, many other companies have joined the race to develop fully autonomous vehicles. Hybrid PVT (Photovoltaic Thermal) heat exchangers cooled with mini-channels find application in autonomous vehicles as a solution that enables efficient cooling of the vehicle's electronics and batteries. The solution involves using photovoltaic panels to generate electricity and removing the heat produced during the process using mini-channels is removed by mini-channels. Hybrid PVT heat exchangers cooled with mini-channels can help maintain appropriate temperatures inside autonomous vehicles that generate large amounts of heat from electronic systems and sensors. The setup can improve the performance and reliability of autonomous systems, increase energy efficiency, and reduce energy demands. The experimental setup includes two parallel mini-channel systems separated by a smooth copper plate. The study aims to determine local heat-transfer coefficients, with a cooled solar cell efficiency range of 10% to 14% compared to other research. The cooled PV temperature range achieved was from 19.6 to 22.4 degrees Celsius, which is favorable for photovoltaic panels' operation under approximate light intensity for Poland's latitude. Heat-transfer from hot surfaces to cold fluids is analyzed during single-phase convection using two calculation methods: one-dimensional and numerical simulations using Simcenter STAR CCM+. Cooling photovoltaic modules is critical for the photovoltaic and autonomous vehicle systems sector, making this research significant both theoretically and practically. The research and methods presented in the article on mini-channel cooling of photovoltaic systems and autonomous vehicle systems are innovative at a global scale, and are crucial for further development of sustainable energy systems and reduction of greenhouse gas emissions.
    Źródło:
    Archiwum Motoryzacji; 2023, 100, 2; 5--30
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza stanów granicznych tarcz żelbetowych z otworami z betonu wysokowartościowego z dodatkiem włókien
    Analysis of limit state of reinforced high performance hybrid fiber concrete deep beams with openings
    Autorzy:
    Smarzewski, P.
    Spaczyńska, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/391105.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    elementy żelbetowe
    fibrobeton wysokowartościowy
    tarcze z otworami
    reinforced concrete members
    high performance fibre concrete
    deep beams with openings
    Opis:
    W artykule przedstawiono analizy wytrzymałościowe tarcz z otworami wykonanych z betonu wysokowartościowego z dodatkiem włókien hybrydowych - stalowych i polipropylenowych. Porównano wyniki badań nośności na ścinanie z wartościami obliczonymi analitycznie na podstawie własnej propozycji oceny teoretycznej nośności elementów tarczowych powstałej przez modyfikacje wzorów empirycznych.
    The article presents the analysis of the strength of reinforced deep beams with openings made of high performance hybrid fibre concrete – steel and polypropylene. We compared the results of the shear capacity of the analytically calculated values based on its own assessment of the theoretical capacity of the proposals deep beams members created by modifications of empirical formulas.
    Źródło:
    Budownictwo i Architektura; 2012, 10, 1; 27-36
    1899-0665
    Pojawia się w:
    Budownictwo i Architektura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Performance of Hybrid Photolysis-DCMD and Photocatalysis-DCMD Systems Utilizing UV-C Radiation for Removal of Diclofenac Sodium Salt From Water
    Autorzy:
    Mozia, S.
    Darowna, D.
    Przepiórski, J.
    Morawski, A.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/779272.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    photocatalytic membrane reactor,
    direct contact membrane distillation
    photolysis
    photocatalysis
    diclofenac sodium salt
    Opis:
    The removal of a non-steroidal anti-inflammatory drug (NSAID) diclofenac sodium salt (DCF, C14H10Cl2NNaO2) from water in two hybrid systems coupling photolysis or photocatalysis with direct contact membrane distillation (DCMD) is presented. A UV-C germicidal lamp was used as a source of irradiation. The initial concentration of DCF was in the range of 0.005-0.15 mmol/dm3 and the TiO2 AeroxideŽ P25 loading (hybrid photocatalysis-DCMD) ranged from 0.05 to 0.4 g/dm3. Regardless of the applied hybrid system and the initial concentration of DCF, the model drug was completely decomposed within 4h of irradiation or less. Mineralization was less efficient than photodecomposition. In case of the hybrid photolysis-DCMD process the efficiency of TOC degradation after 5h of irradiation ranged from 27.3-48.7% depending on the DCF initial concentration. The addition of TiO2 allowed to improve the efficiency of TOC removal. The highest degradation rate was obtained at 0.3 gTiO2/dm3. During the process conducted with the lowest DCF initial concentrations (0.005-0.025 mmol/dm3) a complete mineralization was obtained. However, when higher initial amounts of DCF were used (0.05-0.15 mmol/dm3), the efficiency of TOC degradation was in the range of 82.5-85%. The quality of distillate was high regardless of the system: DCF was not detected, TOC concentration did not exceeded 0.7 mg/dm3 (1.9 mg/dm3 in permeate) and conductivity was lower than 1.6 žS/cm.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 1; 51-60
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of the natural gas price on industrial performance during a hybrid war
    Wpływ ceny gazu ziemnego na wyniki przemysłu w czasie wojny hybrydowej
    Autorzy:
    Goncharuk, Anatoliy G.
    Liashenko-Shcherbakova, Valeria
    Chaika, Natalia
    Powiązania:
    https://bibliotekanauki.pl/articles/2048454.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    natural gas
    price change
    performance indicators
    hybrid war
    industries
    Ukraine
    gaz ziemny
    zmiana cen
    wskaźniki efektywności
    wojna hybrydowa
    przemysł
    Ukraina
    Opis:
    In the contemporary world, natural gas is one of the focuses of hybrid wars and is used as a tool of international economic and political pressure to gain appropriate benefits. The long-term pressure of Russia on Ukraine using a combination of military, political, economic, information and energy tools is one of the most striking cases of applying natural gas as a weapon in a hybrid war. Exploring the case of Ukraine, the authors confirmed the hypothesis about the change in the impact of the prices of natural gas on the performance of its industrial consumers during a hybrid war. The study covered three industrial sectors that are major consumers of natural gas – the metallurgy, chemical and pharmaceutical industries. The data of nine key companies of these industries for the period 2006–2019 were analyzed; this period was divided into two parts – before the hybrid war (2006–2013) and during it (2014–2019). The authors identified the heterogeneity of the influence of natural gas prices on the performance of different industrial enterprises. However, since the onset of the hybrid war, all of them have shown a reducing correlation of natural gas prices with all the analyzed performance indicators – operating profitability, material-output ratio, and labor productivity. The study managed to build reliable regression models that allow defining the prices of natural gas for the chemical industry and metallurgy, above which these industries in Ukraine become unprofitable. The defined critical levels have a practical implication since they can be tools for regulating natural gas prices for various industrial sectors.
    We współczesnym świecie gaz ziemny jest jednym z narzędzi używanych w wojach hybrydowych i jest wykorzystywany do wywierania międzynarodowej presji gospodarczej i politycznej w celu uzyskania odpowiednich korzyści. Długotrwała presja Rosji na Ukrainę za pomocą kombinacji narzędzi militarnych, politycznych, ekonomicznych, informacyjnych i energetycznych jest jednym z najbardziej uderzających przypadków zastosowania gazu ziemnego jako broni w wojnie hybrydowej. Badając przypadek Ukrainy, autorzy potwierdzili hipotezę o wpływie zmian cen gazu ziemnego na wyniki jego odbiorców przemysłowych podczas wojny hybrydowej. Badanie objęło trzy sektory przemysłu, które są głównymi konsumentami gazu ziemnego – przemysł metalurgiczny, chemiczny i farmaceutyczny. Przeanalizowano dane dziewięciu kluczowych firm z tych branż za lata 2006–2019; okres ten został podzielony na dwie części – przed wojną hybrydową (2006–2013) i w jej trakcie (2014–2019). Autorzy zidentyfikowali niejednorodność wpływu cen gazu ziemnego na funkcjonowanie różnych przedsiębiorstw przemysłowych. Jednak od początku wojny hybrydowej wszystkie one wykazywały zmniejszającą się korelację cen gazu ziemnego ze wszystkimi analizowanymi wskaźnikami efektywności – rentownością operacyjną, relacją materiałów do produkcji oraz wydajnością pracy. W badaniu udało się zbudować wiarygodne modele regresji, które pozwalają określić ceny gazu ziemnego dla przemysłu chemicznego i hutniczego, powyżej których te branże na Ukrainie stają się nierentowne. Zdefiniowane progi mają praktyczne znaczenie, ponieważ mogą być narzędziami regulacji cen gazu ziemnego dla różnych sektorów przemysłu.
    Źródło:
    Polityka Energetyczna; 2021, 24, 4; 105-120
    1429-6675
    Pojawia się w:
    Polityka Energetyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal efficiency and hydraulic performance evaluation on Ag–Al2O3 and SiC–Al2O3 hybrid nanofluid for circular jet impingement
    Autorzy:
    Datta, Abanti
    Halder, Pabitra
    Powiązania:
    https://bibliotekanauki.pl/articles/1845498.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hybrid nanofluid
    thermal performance factor
    pumping power
    merit number
    Opis:
    Hybrid nanofluids is obtained by dispersing more than one nanoparticle into a base fluid. The work is concerned with a detailed numerical investigation of the thermal efficiency and hydraulic performance of hybrid nanofluids for circular jet impinges on a round plate. For this paper, a metal (Ag), a metal oxides (Al2O3) and a metal carbides (SiC) nanoparticle and their water based hybrid nanofluids are considered to analyse numerically with varying significant dimensionless parameters, i.e., the jet-to-plate spacing ratio, Reynolds number and volume fraction of nanoparticles. The results demonstrated that the efficiency of heat transfer of all nanofluids is increased by the addition of nanoparticle to the dispersed in water at constant Reynolds number. Moreover, the results illustrate that heat transfer efficacy and pumping power penalty both increased as jet-to-plate spacing ratio reduced. The jet-to-plate spacing ratio equal to 4 is the best as the percentage enhance heat transfer is maximum in this situation. Since both the heat transfer effect and pumping penalty increase using hybrid nanofluids, thermal performance factor increases or decreases depends on nanoparticles of nanofluids. It is evident that the analysis of these hybrid nanofluids will consider both the increase in heat efficiency and the pumping capacity. The best flow behaviour is achieved for SiC–Al2O3 hybrid nanofluids. New merit number is introduced for additional clarification.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 1; 163-182
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving estimation accuracy of metallurgical performance of industrial flotation process by using hybrid genetic algorithm – artificial neural network (GA-ANN)
    Autorzy:
    Allahkarami, E.
    Salmani Nuri, O.
    Abdollahzadeh, A.
    Rezai, B.
    Maghsoudi, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/109424.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    artificial neural network
    genetic algorithm
    prediction
    copper flotation
    Opis:
    In this study, a back propagation feed forward neural network, with two hidden layers (10:10:10:4), was applied to predict Cu grade and recovery in industrial flotation plant based on pH, chemical reagents dosage, size percentage of feed passing 75 μm, moisture content in feed, solid ratio, and grade of copper, molybdenum, and iron in feed. Modeling is performed basing on 92 data sets under different operating conditions. A back propagation training was carried out with initial weights randomly mode that may lead to trapping artificial neural network (ANN) into the local minima and converging slowly. So, the genetic algorithm (GA) is combined with ANN for improving the performance of the ANN by optimizing the initial weights of ANN. The results reveal that the GA-ANN model outperforms ANN model for predicting of the metallurgical performance. The hybrid GA-ANN based prediction method, as used in this paper, can be further employed as a reliable and accurate method, in the metallurgical performance prediction.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 1; 366-378
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancing the performance of deep learning technique by combining with gradient boosting in rainfall-runoff simulation
    Autorzy:
    Abdullaeva, Barno S.
    Powiązania:
    https://bibliotekanauki.pl/articles/28411647.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    deep learning
    gradient boosting
    hybrid model
    multi-step ahead forecasting
    rainfall-runoff simulation
    Opis:
    Artificial neural networks are widely employed as data mining methods by researchers across various fields, including rainfall-runoff (R-R) statistical modelling. To enhance the performance of these networks, deep learning (DL) neural networks have been developed to improve modelling accuracy. The present study aims to improve the effectiveness of DL networks in enhancing the performance of artificial neural networks via merging with the gradient boosting (GB) technique for daily runoff data forecasting in the river Amu Darya, Uzbekistan. The obtained results showed that the new hybrid proposed model performed exceptionally well, achieving a 16.67% improvement in determination coefficient (R2) and a 23.18% reduction in root mean square error (RMSE) during the training phase compared to the single DL model. Moreover, during the verification phase, the hybrid model displayed remarkable performance, demonstrating a 66.67% increase in R2 and a 50% reduction in RMSE. Furthermore, the hybrid model outperformed the single GB model by a significant margin. During the training phase, the new model showed an 18.18% increase in R2 and a 25% reduction in RMSE. In the verification phase, it improved by an impressive 75% in R2 and a 33.33% reduction in RMSE compared to the single GB model. These findings highlight the potential of the hybrid DL-GB model in improving daily runoff data forecasting in the challenging hydrological context of the Amu Darya River basin in Uzbekistan.
    Źródło:
    Journal of Water and Land Development; 2023, 59; 216--223
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analysis between a hybrid force/position and conventional controllers for a wrist exoskeleton
    Autorzy:
    Avilés, Valeria
    Avilés, Oscar F.
    Aponte, Jorge
    Caldas, Oscar I.
    Mauledoux, Mauricio F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2134891.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    exoskeleton
    hybrid control
    force
    performance
    position
    Opis:
    This study analyses the performances of various path controlling strategies for a 3-degrees of freedom wrist exoskeleton, by comparing key indicators, such as rise time, steady-state error, and implementation difficulty. A model was built to describe both system’s kinematics and dynamics, as well as 3 different controllers (PID, PD+, and a hybrid force/position controller) that were designed to allow each joint to perform smooth motions within anatomic ranges. The corresponding simulation was run and assessed via Matlab (version 2020a). In addition to the performance comparison, remarkable characteristics could be identified among controllers. PD+ showed higher response speed than the other controllers (about 4 times), and PID was reinforced as the technique with the easiest implementation due to the smallest matrices. The study also allowed to greater potential of the hybrid controller to interact with its environment, i.e., the robotic device.
    Źródło:
    Archives of Control Sciences; 2022, 32, 2; 409--427
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Hybrid Task-Based Language Teaching and Critical Thinking on Writing Performance in Indonesia
    Autorzy:
    Tusino, -
    Faridi, Abdurrachman
    Saleh, Mursid
    Fitriati, Sri Wuli
    Powiązania:
    https://bibliotekanauki.pl/articles/1963612.pdf
    Data publikacji:
    2020-09-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    hybrid learning
    task-based language teaching
    critical thinking
    writing performance
    Opis:
    This study aims to describe the effect of hybrid task-based language teaching and critical thinking skills on writing performance among Indonesian learners. This study employed experimental research with a factorial design. The participants were Indonesian undergraduate learners majoring in an English program. The instruments used were critical thinking questionnaires and writing tests in the genre-based writing course. The results of the study showed that hybridtask-based language teaching was effective for improving EFL learners’ writing performance. Also, it revealed that learners with high critical thinking achieved better writing performance than learners with low critical thinking after being taught by hybrid task-based language teaching. The results indicate that hybrid task-based language teaching and critical thinking have a significant effect on EFL writing performance.
    Źródło:
    The New Educational Review; 2020, 61; 109-118
    1732-6729
    Pojawia się w:
    The New Educational Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Agronomic performance and heterosis of strawberry inbred hybrids obtained by top-cross mating system
    Autorzy:
    Kaczmarska, E.
    Gawroński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/12619194.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    plant cultivation
    strawberry
    heterosis
    plant hybrid
    inbreeding
    top-cross
    mating system
    agronomic performance
    Opis:
    The aim of this study was to develop an inbred lines from octoploid strawberry and to determine their breeding value by estimating the effects of general combining ability (GCA) and mid-parent heterosis. All inbred lines were obtained through selfing using five cultivars. The number of inflorescences, number of flowers per inflorescence, fruit yield, fruit number per plant, average fruit weight, number and weight of leaves as well as number of runners per plant were recorded from 2014 to 2015. The highest breeding value was estimated for maternal forms of ‘Senga Sengana’ 17 for six important traits. The lowest GCA effects were exhibited by inbred lines derived from clone 1387 18. Degree of heterosis for a given trait differed greatly among hybrids. The highest heterosis in terms of a number of inflorescences, fruit yield, number of fruits per plant and leaf weight occurred in the Kent 7-14 × ‘Dukat’ progeny. The results obtained could be used to evaluate the agronomic performance and to make more efficient choices of parents in current strawberry breeding programs
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 1; 85-97
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie technologii hybrydowych i natywnych do wytwarzania aplikacji mobilnych iOS
    Comparison of hybrid and native iOS mobile application development technologies
    Autorzy:
    Kocki, Michał
    Urban, Michał
    Kopniak, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/24083477.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Lubelska. Instytut Informatyki
    Tematy:
    iOS
    technologie natywne
    technologie hybrydowe
    wydajność
    native technologies
    hybrid technologies
    performance
    Opis:
    Aplikacje mobilne dedykowane na system operacyjny iOS mogą być wytwarzane natywnie bądź hybrydowo. Tematyką artykułu jest porównanie tych technologii na przykładzie utworzonej aplikacji mobilnej. Zbadana została wydajność obu technologii na przykładzie dwóch urządzeń testowych i smartfona posiadającego system iOS. Biorąc pod uwagę analizę wydajności, został zbadany czas kompilacji aplikacji, odczyt i zapis danych z bazy danych w chmurze, a także czas sortowania odczytanych danych. Na urządzeniach testowych sprawdzono jak bardzo wytworzone aplikacje obciążają system. Otrzymane wyniki potwierdzają, że wytwarzanie aplikacji mobilnej w technologii natywnej jest wydajniejsze.
    Mobile applications dedicated to iOS can be developed natively or hybrid. The subject of this paper is to compare these technologies on the example of a created mobile application. The performance of both technologies, the structure of projects, as well as resource consumption on the example of four smartphones operating under iOS, has been examined. Considering the performance analysis, the compilation time of the application, reading and writing data from the cloud database, as well as the time of sorting the read data was examined. On the test devices, it was checked how intense is the use of the system. The obtained results confirm that producing a mobile application in native technology is more performance efficient.
    Źródło:
    Journal of Computer Sciences Institute; 2022, 25; 280--287
    2544-0764
    Pojawia się w:
    Journal of Computer Sciences Institute
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-mode switching control of hybrid electromagnetic suspension based on road conditions adaptation
    Autorzy:
    Meng, Xiangpeng
    Ding, Renkai
    Sun, Zeyu
    Wang, Ruochen
    Chen, Long
    Powiązania:
    https://bibliotekanauki.pl/articles/2055038.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    hybrid electromagnetic suspension
    multi-mode switching control
    road conditions
    adaptation
    dynamic performance
    energy regeneration
    Opis:
    In this research, a hybrid electromagnetic actuator is proposed to coordinate the contradictions between dynamic performance and energy consumption of an electromagnetic suspension. The hybrid electromagnetic suspension (HEMS) is configured to operate in the passive energy regeneration mode, active control ride comfort mode or active control driving safety mode depending on the road excitation frequency. Then, the HEMS system is modeled. The simulation results show that the HEMS can automatically switch between different modes, and realize an effective coordination between dynamic performance and energy saving. Finally, a quarter car test is conducted, which verifies the effectiveness of the multi-mode switching control.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2020, 58, 3; 697--710
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on performance of planing-wing hybrid craft
    Autorzy:
    Zeraatgar, Hamid
    Rostami, Ali Bakhshandeh
    Nazari, Abolfazl
    Powiązania:
    https://bibliotekanauki.pl/articles/259870.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    hydrodynamics
    ground effect
    wing
    planing
    aerodynamics
    VLM
    Opis:
    A hybrid craft is defined as a combination of different lifting surfaces. The lift force can be of aerodynamic or hydrodynamic character. This research deals with the conditions of using planing mono-hulls equipped with a couple of wings, called planing-wing hybrid craft. A parametric study is conducted by using Vortex Lattice Method to determine feasibility of using an aerodynamic wing mounted to planing craft. It has been determined that the wing area should be more than twice as much as the wetted surface of the craft, to get an effective wing for planing craft. Furthermore, the wing should be so designed as to obtain its high aspect ratio. Maximum lift force contribution resulting from different wing configurations considered in this study is less than 35 percent of the total hydrodynamic lift force at an arbitrary condition. On this basis it may be concluded that the wing may be effectively used only in special conditions, hence this is not recommended for general application.
    Źródło:
    Polish Maritime Research; 2012, 4; 16-22
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the performance of an aircraft powered by hybrid propulsion
    Autorzy:
    Majka, Andrzej
    Muszyńska-Pałys, Jagoda
    Powiązania:
    https://bibliotekanauki.pl/articles/24202466.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    air transport
    hybrid power unit
    electric aircraft
    Small Air Transport
    SAT
    aircraft emission
    transport lotniczy
    jednostka napędu hybrydowego
    samolot elektryczny
    emisja lotnicza
    Opis:
    Travel is an inseparable part of human life. It is connected not only with private life but also with business life. People want to travel more, farther and faster. That is why air transport is currently one of the fastest-growing areas of passenger transport, and airlines carry more and more passengers from year to year. Due to the growing negative impact of air transport on the natural environment, research aimed at the development of technologies to reduce the negative impact of air transport is becoming more and more important. One of the possibilities for improving the situation is the use of alternative energy sources, limiting the emission of greenhouse gases into the atmosphere. The paper aimed to analyze the meaningfulness of replacing the classic power unit in a light transport aircraft with a hybrid, combustion-electric power unit. Analyzes were made with the use of simulation methods for the PZL M-28 aircraft.
    Źródło:
    Combustion Engines; 2023, 62, 2; 45--51
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the law of the iterated logarithm in hybrid multiphase queueing systems
    Autorzy:
    Minkevičius, Saulius
    Powiązania:
    https://bibliotekanauki.pl/articles/1181931.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    operations research
    model
    computer network
    queueing network
    performance evaluationi
    iterated logarithm
    Opis:
    The model of a hybrid multiphase queueing system (HMQS) has been developed to measure the performance of complex computer networks working under conditions of heavy traffic. Two probability limit theorems (laws of the iterated logarithm, LIL) are presented for a queue length of jobs in HMQS.
    Źródło:
    Operations Research and Decisions; 2020, 30, 4; 57-64
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of Hybrid Yarn with the Combination of Fiber and Filaments and Its Effect on the Denim Fabric Performance
    Autorzy:
    Babaarslan, Osman
    Shahid, Md Abul
    Doğan, Fatma B.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200938.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    dual core-spun yarn
    elastane
    filament yarn
    yarn properties
    denim fabric performance
    Opis:
    Consumer choice and behavior are changing and focusing on comfortable clothing along with fitting. Elastic yarn or fabric is necessary to achieve this comfortableness. By making elastic yarn and using elastic material in fabric production, elastic cloths are produced with proper stretchability and recovery. For that, core-spun yarn was used, but due to a lack of recovery performance, dual core-spun yarn has been developed. Different elastane ratios, linear density, and filaments were used in the dual core-spun yarn according to achieve desired stretchability. In this study, denim fabric performances were evaluated by designing different composite/hybrid dual core-spun yarn with a combination of cotton fiber and filaments. Different elastane linear densities with different filaments, PET/PTT, PTT, and PET, were used, and it was found that using finer elastane in dual core-spun yarn, strength, and unevenness are increased, and elongation decreased. Using PET/PTT filament increases hairiness, and using PTT filament increases elongation. For fabrics, coarser elastane in the dual core-spun yarns has higher stiffness, elasticity, and shrinkage. Fabric with PTT showed higher weight change and stiffness, whereas PET filament-based fabric samples have good strength and low stiffness. In addition, a multiple regression analysis was carried out for yarn and fabric properties, and mathematical models were developed.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2023, 31, 1; 25--37
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Shifting to blended online learning and its impact on student performance: A case study for students enrolled in economic courses prior to COVID-19 emergency remote instruction
    Autorzy:
    Tila, Dorina
    Powiązania:
    https://bibliotekanauki.pl/articles/1827672.pdf
    Data publikacji:
    2020-11
    Wydawca:
    Szkoła Główna Handlowa w Warszawie
    Tematy:
    blended learning
    hybrid learning
    distance learning
    online learning
    students’ performance
    Opis:
    This study explores whether student academic performance differs between the face-to-face and online hybrid sections in an undergraduate introductory macroeconomic course offered at a US community college. The data was collected from 414 students enrolled in various sections of the course during five semesters from spring 2016 to fall 2018. The findings show no statistical difference in student performance between face-to-face and online hybrid courses and contribute to the literature specific to the discipline of economics, which unlike other disciplines, has shown discord in findings. The usefulness of such results may extend to US higher education institutions to help them make data-informed decisions about their future investments in online teaching modalities and course design in the discipline of economics.
    Źródło:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2020, 86, 4; 62-71
    1731-6758
    1731-7428
    Pojawia się w:
    e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Particle size characterization using fraunhoffer diffraction and milling performance of maize
    Autorzy:
    Le Deschault de Monredon, F.
    Chaurand, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/26053.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    milling
    fractionation
    laser diffraction
    hybrid
    endosperm
    maize
    plant material
    starch granule
    Źródło:
    International Agrophysics; 1997, 11, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New test method with a Hybrid III Anthropomorphic Dummy for Textile Safety Harnesses
    Metoda badania szelek bezpieczeństwa w warunkach obciążenia dynamicznego z zastosowaniem manekina antropomorficznego typ Hybrid III
    Autorzy:
    Baszczyński, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/232669.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    full body harnesses
    falls from height
    anthropomorphic dummy
    performance tests
    szelki bezpieczeństwa
    upadki z wysokości
    manekin antropomorficzny
    badania eksploatacyjne
    Opis:
    A full body harness is a basic component of personal fall arrest equipment. It is made from webbing connected by seams and metal fittings to firmly hold and support the user’s body. The paper proposes a new method for full body harness testing using a Hybrid III anthropomorphic dummy; also the design of the experimental stand and software used are described. The method analyses the behaviour of a dummy during a fall arrest under well-defined conditions. The critical mechanical factors measured during the study presented were: the head acceleration, forces acting on the spine, the position of the dummy, the impacts of harness elements to the head, etc. The tests identified some potentially dangerous phenomena associated with falls from a height. The harness testing method developed turned out to be a valuable tool that should be applied in conjunction with existing strength testing methods.
    Szelki bezpieczeństwa są podstawowym składnikiem indywidualnego sprzętu chroniącego przed upadkiem z wysokości. Szelki są konstrukcją z tkanych taśm włókienniczych połączonych ze sobą za pomocą szwów i metalowych elementów łączących, w taki sposób aby obejmowały i podtrzymywały ciało użytkownika. W artykule przedstawiono nową metodę badania szelek za pomocą manekina antropomorficznego Hybrid III oraz zaprezentowano stanowisko badawcze i wykorzystywane oprogramowanie. Zaproponowana metoda opiera się na badaniu zachowania manekina ubranego w szelki podczas powstrzymywania spadania w ściśle określonych warunkach. Do najważniejszych wielkości mierzonych w badaniach należą: przyspieszenia głowy, siły w kręgosłupie, pozycja manekina, uderzenia elementów szelek w głowę manekina itp. Uzyskane wyniki pozwoliły na identyfikację potencjalnie niebezpiecznych zjawisk towarzyszących powstrzymywaniu spadania z wysokości. Opracowana metoda badań okazała się cennym narzędziem do oceny szelek, które powinno być stosowane wraz z dotychczasowymi metodami o charakterze wytrzymałościowym.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2020, 1 (139); 81-86
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A performance analysis of a hybrid golden section search methodology and a nature-inspired algorithm for MPPT in a solar PV system
    Autorzy:
    Mostafa, Hazem H.
    Ibrahim, Amr M.
    Anis, Wagdi R.
    Powiązania:
    https://bibliotekanauki.pl/articles/141645.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hybrid optimization
    golden sections search
    multi-verse optimization algorithm
    maximum power point tracking
    perturb and observe
    photovoltaic (PV)
    Opis:
    This research presents a comparative study for maximum power point tracking (MPPT) methodologies for a photovoltaic (PV) system. A novel hybrid algorithm golden section search assisted perturb and observe (GSS-PO) is proposed to solve the problems of the conventional PO (CPO). The aim of this new methodology is to boost the efficiency of the CPO. The new algorithm has a very low convergence time and a very high efficiency. GSS-PO is compared with the intelligent nature-inspired multi-verse optimization (MVO) algorithm by a simulation validation. The simulation study reveals that the novel GSS- PO outperforms MVO under uniform irradiance conditions and under a sudden change in irradiance.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 3; 611-627
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrydowe metody pracy z bazami danych w aplikacjach JEE
    Hybrid methods of working with databases in JEE applications
    Autorzy:
    Jóźwicka, Katarzyna
    Mitrus, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/98372.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Lubelska. Instytut Informatyki
    Tematy:
    JEE
    Hibernate
    Spring
    JDBC
    bazy danych
    wydajność
    databases
    performance
    Opis:
    W artykule przedstawiono możliwości hybrydyzacji metod pracy z bazami danych w aplikacjach JEE. Do przeprowadzenia badań wykorzystano aplikacje wykonane w oparciu o interfejs JDBC, Hibernate oraz Spring. Analiza wydajności aplikacji dotyczyła czasu wykonywania oraz zużycia pamięci RAM dla podstawowych operacji CRUD w bazie danych.
    The article presents the research on hybridization of methods of working with databases in JEE applications. The test applications were made based on the JDBC interface, Hibernate and Spring framework. Application performance analysis covered the execution time and RAM usage for basic CRUD operations in the database.
    Źródło:
    Journal of Computer Sciences Institute; 2019, 12; 167-171
    2544-0764
    Pojawia się w:
    Journal of Computer Sciences Institute
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combining ability vs. population performance of genetic resources in rye
    Autorzy:
    Roux, S. R.
    Miedaner, T.
    Geiger, H. H.
    Knopf, E.
    Wilde, P.
    Wortmann, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2198911.pdf
    Data publikacji:
    2003-12-21
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    combining ability
    genetic resources
    hybrid rye breeding programme
    Opis:
    The comparison of the population per se performance and the combining ability of 19 genetic resources and 5 adapted populations demonstrated that genetic resources might be integrated in hybrid rye breeding programmes without previous selection for yield. However, highly heritable traits like straw length and susceptibility to lodging should be improved before.
    Źródło:
    Plant Breeding and Seed Science; 2003, 48; 45-47
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and Performance Analysis of Peltier & Piezoelectric Human Energy Harvesting Hybrid Model for WBAN Application
    Autorzy:
    Dhillon, Hardeep Singh
    Chawla, Paras
    Powiązania:
    https://bibliotekanauki.pl/articles/227297.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wireless
    energy harvesting
    body node
    body node coordinator (BNC)
    piezo-electric harvester
    peltier
    Opis:
    Wireless body area network (WBAN) has evolved from Wireless personal area network (WPAN), a prominent area of research with vast applications in last decade. In WBAN, various wirelessly interconnected body node (BN) are implanted in or around the human body. Also due to advancement in technology a miniature low power device/BN is developed. The main challenge in WBAN body node is to maintain finite size of battery as well as to increase its capacity. Hence this issue can be resolved by using energy harvesting. Generally researchers have used piezoelectric, electromagnetic or solar harvester only. But, in this research energy harvesting using the hybrid optimization of Piezoelectric and Peltier sensors by controlling on-off timing of body nodes is introduced. A hybrid optimized algorithm is developed using MATLAB 2015b platform and extensive simulation is performed considering four different human gestures (relaxing, walking, running and fast running) which in turn improves overall Quality of Service (QoS) including average (packet loss, end to end delay, throughput) and overall detection efficiency.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 3; 435-440
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie osiągów elektrycznych akumulatora typu Ni-MH do zastosowania w napędach hybrydowych
    Investigation of the electrical performance of Ni-MH-type battery in terms of its application in hybrid propulsion
    Autorzy:
    Sierczyńska, A.
    Kopczyk, M.
    Jankowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/158282.pdf
    Data publikacji:
    2008
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    akumulatory typu nikiel- wodorek metalu
    charakterystyka elektryczna
    napędy hybrydowe
    nickel-metal hydride battery
    electrical characteristic
    hybrid drive
    Opis:
    W pracy zaprezentowano wyniki badań zaprojektowanego w CLAiO pryzmatycznego akumulatora Ni-MH o napięciu 1,2 V i pojemności nominalnej 18 Ah, przeznaczonego do rozładowań wysokimi prądami. Przeprowadzone badania elektryczne pozwoliły zaobserwować różnice w osiąganych wartościach pojemności wyładowania oraz napięciach pracy ogniwa w zależności od zastosowanych trybów ładowania / rozładowania. Badany akumulator wykazywał wysoką żywotność cykliczną przy trybach ładowania / rozładowania stosowanych w HEV. Opracowany akumulator charakteryzował się wysoką skutecznością ładowania. Uzyskano wysoki stopień odzysku ładunku elektrycznego. Uzyskano bardzo dobre wyniki pojemności rozładowania ogniwa w niskich temperaturach. Przeprowadzone badania pozwoliły określić wstępnie przydatność tego typu ogniw do napędów hybrydowych.
    In the paper results of tests performed on a prismatic 1.2 V, 18 Ah Ni-MH type battery constructed in CLAiO and destined for high-drain applications are presented. The tests revealed differences in discharge capacities and working voltages in relation to the applied charge/discharge regimes. The tested battery showed good cyclic behavior under the regimes typical for hybrid electric vehicles (HEV). The battery shows also high charging efficiency and high degree of charge recovery. Very good values of discharge capacities were obtained at low temperatures. The tests allowed for a preliminary assessment of the applicability of this type of cells in hybrid propulsion.
    Źródło:
    Pomiary Automatyka Kontrola; 2008, R. 54, nr 7, 7; 440-442
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance Comparison of Four New ARIMA-ANN Prediction Models on Internet Traffic Data
    Autorzy:
    Babu, C. N.
    Reddy, B. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/308269.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    ANN
    ANN training
    ARIMA
    Box-Jenkins methodology
    hybrid ARIMA-ANN model
    Internet traffic forecasting
    Opis:
    Prediction of Internet traffic time series data (TSD) is a challenging research problem, owing to the complicated nature of TSD. In literature, many hybrids of auto-regressive integrated moving average (ARIMA) and artificial neural networks (ANN) models are devised for the TSD prediction. These hybrid models consider such TSD as a combination of linear and non-linear components, apply combination of ARIMA and ANN in some manner, to obtain the predictions. Out of the many available hybrid ARIMA-ANN models, this paper investigates as to which of them suits better for Internet traffic data. This suitability of hybrid ARIMA-ANN models is studied for both one-step ahead and multistep ahead prediction cases. For the purpose of the study, Internet traffic data is sampled at every 30 and 60 minutes. Model performances are evaluated using the mean absolute error and mean square error measurement. For one-step ahead prediction, with a forecast horizon of 10 points and for three-step prediction, with a forecast horizon of 12 points, the moving average filter based hybrid ARIMA-ANN model gave better forecast accuracy than the other compared models.
    Źródło:
    Journal of Telecommunications and Information Technology; 2015, 1; 67-75
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analysis of rough set–based hybrid classification systems in the case of missing values
    Autorzy:
    Nowicki, Robert K.
    Seliga, Robert
    Żelasko, Dariusz
    Hayashi, Yoichi
    Powiązania:
    https://bibliotekanauki.pl/articles/2031102.pdf
    Data publikacji:
    2021
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    rough sets
    support vector machine
    fuzzy system
    neural networks
    Opis:
    The paper presents a performance analysis of a selected few rough set–based classification systems. They are hybrid solutions designed to process information with missing values. Rough set-–based classification systems combine various classification methods, such as support vector machines, k–nearest neighbour, fuzzy systems, and neural networks with the rough set theory. When all input values take the form of real numbers, and they are available, the structure of the classifier returns to a non–rough set version. The performance of the four systems has been analysed based on the classification results obtained for benchmark databases downloaded from the machine learning repository of the University of California at Irvine.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2021, 11, 4; 307-318
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of membrane performance in the separation of carbon dioxide
    Autorzy:
    Tanczyk, M.
    Warmuziński, K.
    Janusz-Cygan, A.
    Jaschik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/185597.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    produkcja wodoru
    proces hybrydowy
    proces membranowy
    hydrogen production
    hybrid process
    pressure swing adsorption
    membrane process
    Opis:
    HY2SEPS was an EU-funded project directed at the reduction of C02 emissions. The principal objective of the project was to develop a hybrid membrane-adsorptive H2/C02 separation technique that would form an integral element of the pre-combustion process. Specific tasks included the derivation of simplified mathematical models for the membrane separation of H2/C02 mixtures. In the present study one of the developed models is discussed in detail, namely that with the countercurrent plug flow of the feed and the permeate. A number of simulations were carried out concerning the separation of binary mixtures that may appear following steam conversion of methane. The numerical results were then compared with the experimental data obtained by FORTH/ICEHT. The estimated fluxes of pure C02, H2, CH4 and N2 are shown alongside those measured experimentally as a function of temperature and C02 partial pressure in Figs 2 - 7. It is concluded that, in general, C02 flux increases monotonically with both temperature and C02 partial pressure. It is also found that the fluxes of hydrogen, methane and nitrogen reach a minimum at a temperature slightly above 323 K. Overall, a good agreement was obtained between the simulations and experiments.
    Źródło:
    Chemical and Process Engineering; 2011, 32, 4; 291-298
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stany graniczne użytkowalności belek żelbetowych z betonu wysokowartościowego z dodatkiem włókien
    Serviceability limit states of high performance reinforced concrete beams with hybrid fibre
    Autorzy:
    Smarzewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/390909.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    belka żelbetowa
    beton wysokowartościowy
    włókno stalowe
    włókno polipropylenowe
    system ARAMIS
    odkształcenie
    przemieszczenie
    rysa
    reinforced beam
    high performance concrete
    steel fibre
    polypropylene
    fibre
    strain
    displacement
    crack
    Opis:
    W artykule przedstawiono wyniki i analizy badań belek żelbetowych wykonanych z betonu wysokowartościowego z dodatkiem włókien stalowych i polipropylenowych poddanych zginaniu w schemacie 4-punktowym przy obciążeniach eksploatacyjnych. Badania przeprowadzono dla trzech prostokątnych belek żelbetowych zróżnicowanych pod względem ilości i rodzaju zbrojenia. W belce B1 skonstruowano tradycyjne zbrojenie prętami stalowymi. W belkach B2 i B3 zamiast prętów górnych i strzemion zastosowano zbrojenie rozproszone o zmiennej procentowej objętości włókien. W badaniach wykorzystano system pomiarowy do bezkontaktowych trójwymiarowych pomiarów odkształceń – ARAMIS. Analizy zachowania belek pod obciążeniem statycznym w zakresie użytkowalności przedstawiono w oparciu o: obrazy zarysowania i odkształcenia oraz zależności siła-przemieszczenie.
    The article presents the results of research and analysis of reinforced high performance concrete beams with steel and polypropylene fibres at service load. The beams were bent in the 4-point model. Research was carried out for three different rectangular reinforced concrete beams in terms of the quantity and the type of reinforcement. The beam B1 was constructed conventionally with reinforced steel rods. The beams B2 and B3, instead of the compressive rods and the stirrups the fibre reinforcement of variable fibre volume percentage was applied. In the tests a non-contact system for three-dimensional measurements of deformation – ARAMIS was used. The analysis of the behaviour of the beams under static load for serviceability was based on: images of cracks, strain and force – displacement curves.
    Źródło:
    Budownictwo i Architektura; 2013, 12, 1; 155-162
    1899-0665
    Pojawia się w:
    Budownictwo i Architektura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance Analysis of a Hybrid Generation System of Wind Turbines, Photovoltaic Modules, and a Fuel Cell
    Analiza pracy hybrydowego systemu wytwórczego składającego się z turbin wiatrowych, modułów fotowoltaicznych oraz ogniwa paliwowego
    Autorzy:
    Ceran, B.
    Sroka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/397078.pdf
    Data publikacji:
    2015
    Wydawca:
    ENERGA
    Tematy:
    distributed generation
    fuel cells
    electrolysis
    energy storage
    hybrid generation systems
    generacja rozproszona
    ogniwa paliwowe
    elektroliza
    magazynowanie energii
    hybrydowe systemy wytwórcze
    Opis:
    This paper presents the results of energy analysis of a generation system consisting of wind turbines, photovoltaic modules, a fuel cell with a polymer membrane, and an electrolyser. The analysis was carried out for three configurations of generating devices’ connections with consumer: I – wind turbines and photovoltaic modules supply electrolyser, II – paralel co-operation of fuel cell with renewables, III – renewables supply electrolyser, with the option of direct supply of the consumer.
    W artykule zaprezentowano wyniki analizy energetycznej układu wytwórczego, składającego się z turbin wiatrowych, modułów fotowoltaicznych, ogniwa paliwowego z membraną polimerową oraz elektrolizera. Analizę przeprowadzano dla trzech konfiguracji połączeń urządzeń wytwórczych z odbiorcą: I – turbiny wiatrowe i moduły fotowoltaiczne zasilają elektrolizer, II – współpraca równoległa ogniwa paliwowego ze źródłami odnawialnymi, III – źródła odnawialne zasilające elektrolizer, z możliwością bezpośredniego zasilania odbiorcy.
    Źródło:
    Acta Energetica; 2015, 2; 36-47
    2300-3022
    Pojawia się w:
    Acta Energetica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Indexes of performance of combustion engines in hybrid vehicles during the UDC test
    Użytkowe wskaźniki pracy silników spalinowych w pojazdach hybrydowych podczas testu UDC
    Autorzy:
    Cieślik, W.
    Pielecha, J.
    Szałek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/973122.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    hybrid drive system
    combustion engine
    electric motor
    UDC drive test
    energy recovery
    układ napędu hybrydowego
    silnik spalinowy
    silnik elektryczny
    test jezdny UDC
    odzyskiwanie energii
    Opis:
    An increased interest in hybrid drive systems allowing reduction of fuel consumption and emissions of harmful substances into the atmosphere, as well as their partial use as zero–emission vehicles promotes the development of these types of drive systems. The market analysis indicates an increased sale of hybrid drives in vehicles, and this means that actions taken towards of reduction of fuel consumption are still valid. The aim of this article is to indicate the indexes of performance of combustion engines in hybrid vehicles during a part of the type-approval driving test. The article analyses Toyota hybrid vehicles with particular attention paid to the parameters of the hybrid drive system and the influence of the charge level of battery on the share of the combustion engine operation in the total time of the vehicle operation. The analysis was carried out for vehicles equipped with the Toyota Hybrid Synergy Drive system working with different types of high voltage battery.
    Zwiększone zainteresowanie układami napędu hybrydowego, które pozwalają na zmniejszenie zużycia paliwa, emisji składników szkodliwych do atmosfery, a także częściowe ich wykorzystanie jako pojazdów zeroemisyjnych skłania do rozwoju tych jednostek. Analizy rynkowe wykazują zwiększenie sprzedaży tych układów napędowych w pojazdach, co oznacza aktualność działań podejmowanych w celu zmniejszenia zużycia paliwa. Założeniem artykułu jest wykazanie użytkowych wskaźników pracy silnika spalinowego w pojazdach hybrydowych podczas części homologacyjnego testu jezdnego. Dokonano analizy pojazdów hybrydowych firmy Toyota ze szczególnym uwzględnieniem parametrów układu napędu hybrydowego oraz wpływu stopnia naładowania akumulatorów na udział silnika spalinowego w ogólnym czasie pracy pojazdu. Analizy przeprowadzono dla pojazdów wyposażonych w system napędowy Toyota Hybrid Synergy Drive współpracujący z różnymi rodzajami akumulatorów wysokonapięciowych.
    Źródło:
    Combustion Engines; 2015, 54, 1; 11-25
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An enhanced performance evaluation of workflow computing and scheduling using hybrid classification approach in the cloud environment
    Autorzy:
    Tharani, P.
    Kalpana, A. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086824.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cloud
    workflow scheduling
    machine learning
    CNN
    AlexNet
    chmura
    planowanie przepływu pracy
    nauczanie maszynowe
    Opis:
    Workflow scheduling is the major problem in cloud computing consists of a set of interdependent tasks which is used to solve the various scientific and healthcare issues. In this research work, the cloud based workflow scheduling between different tasks in medical imaging datasets using Machine Learning (ML) and Deep Learning (DL) methods (hybrid classification approach) is proposed for healthcare applications. The main objective of this research work is to develop a system which is used for both workflow computing and scheduling in order to minimize the makespan, execution cost and to segment the cancer region in the classified abnormal images. The workflow computing is performed using different Machine Learning classifiers and the workflow scheduling is carried out using Deep Learning algorithm. The conventional AlexNet Convolutional Neural Networks (CNN) architecture is modified and used for workflow scheduling between different tasks in order to improve the accuracy level. The AlexNet architecture is analyzed and tested on different cloud services Amazon Elastic Compute Cloud- EC2 and Amazon Lightsail with respect to Makespan (MS) and Execution Cost (EC).
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 4; e137728, 1--9
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Analysis of Influence of Sensors’ Failure on the Performance of Mobile Robot Autonomy
    Autorzy:
    Bigaj, P.
    Bartoszek, J.
    Trojnacki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/385037.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    mobile robot
    semiautonomy algorithm
    sensors failure
    matlab/Simulink
    simulation research
    algorithm sensitivity analysis
    hybrid reactive approach
    Opis:
    This work is concerned on sensitivity analysis of semiautonomy algorithm of a mobile robot to environmental sensors’ failures. Construction of the robot, semiautonomy algorithm and used sensors have been described. The algorithm bases on a reactive hybrid approach that merges data from different types of sensors and calculates resulting velocities. This algorithm also takes into account environmental sensors’ damage by modifying the behavior of robot in accordance to actual sensors’ set state of health. Simulation research using Matlab/ Simulink package and experimental tests’ results of semiautonomy algorithm were presented. The experimental tests were carried out in outdoor conditions. The research and tests are performed for normal environmental sensors’ operation and for selected sensors’ damage. On that basis, sensitivity of semiautonomy algorithm to selected environmental sensors damage was tested.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2014, 8, 4; 31-39
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Survey Addressing on High Performance On-Chip VLSI Interconnect
    Autorzy:
    Mohamed Yousuff, C.
    Mohamed Yousuf Hasan, V.
    Khan Galib, M. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/226784.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    current-mode signaling
    hybrid current/voltage mode circuits
    on-chip interconnects delay and power
    voltage mode signaling
    Opis:
    With the rapid increase in transmission speeds of communication systems, the demand for very high-speed lowpower VLSI circuits is on the rise. Although the performance of CMOS technologies improves notably with scaling, conventional CMOS circuits cannot simultaneously satisfy the speed and power requirements of these applications. In this paper we survey the state of the art of on-chip interconnect techniques for improving performance, power and delay optimization and also comparative analysis of various techniques for high speed design have been discussed.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 3; 307-312
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of thermo-electric coolers using hybrid genetic algorithm and simulated annealing
    Autorzy:
    Khanh, D. V. K.
    Vasant, P.
    Elamvazuthi, I.
    Dieu, V. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/230105.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermo-electric coolers
    genetic algorithm
    simulated annealing
    coefficient of performance
    rate of refrigeration
    fitness function
    Opis:
    Thermo-electric Coolers (TECs) nowadays are applied in a wide range of thermal energy systems. This is due to their superior features where no refrigerant and dynamic parts are needed. TECs generate no electrical or acoustical noise and are environmentally friendly. Over the past decades, many researches were employed to improve the efficiency of TECs by enhancing the material parameters and design parameters. The material parameters are restricted by currently available materials and module fabricating technologies. Therefore, the main objective of TECs design is to determine a set of design parameters such as leg area, leg length and the number of legs. Two elements that play an important role when considering the suitability of TECs in applications are rated of refrigeration (ROR) and coefficient of performance (COP). In this paper, the review of some previous researches will be conducted to see the diversity of optimization in the design of TECs in enhancing the performance and efficiency. After that, single-objective optimization problems (SOP) will be tested first by using Genetic Algorithm (GA) and Simulated Annealing (SA) to optimize geometry properties so that TECs will operate at near optimal conditions. Equality constraint and inequality constraint were taken into consideration.
    Źródło:
    Archives of Control Sciences; 2014, 24, 2; 155-176
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid cascade refrigeration systems for refrigeration and heating
    Autorzy:
    Megdouli, K.
    Ezzaalouni, Y.
    Nahdi, E.
    Mhimid, A.
    Kairouani, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/240448.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ejector cycle
    heat pump
    comparison
    refrigerant
    coefficient of performance
    irreversibility
    exergy loss
    second law efficiency
    pompa ciepła
    porównanie
    czynnik chłodniczy
    współczynnik
    efektywność
    nieodwracalność
    Opis:
    In this study a cooling ejector cycle coupled to a compression heat pump is analyzed for simultaneous cooling and heating applications. In this work, the influence of the thermodynamic parameters and fluid nature on the performances of the hybrid system is studied. The results obtained show that this system presents interesting performances. The comparison of the system performances with hydrofluorocarbons (HFC) and natural fluids is made. The theoretical results show that the a low temperature refrigerant R32 gives the best performance.
    Źródło:
    Archives of Thermodynamics; 2018, 39, 2; 73-95
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical performance of FRP-RC flexural members subjected to fire conditions
    Autorzy:
    Protchenko, Kostiantyn
    Elżbieta, Szmigiera
    Urbański, Marek
    Garbacz, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/391083.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    Fibre Reinforced Polymers (FRP) bars
    Hybrid FRP bars
    FRP-RC beams
    Fire resistance of FRP
    Fire resistance of FRP-RC members
    Opis:
    One of the main concerns that limit the widespread use of Fibre-Reinforced Polymers (FRP) bars as internal reinforcement for reinforced concrete (RC) structures is their relatively unexplored response to elevated temperatures. The behaviour of FRP reinforcement at elevated temperature as well as their post-fire behaviour can be different from conventional reinforcement and depends on the properties of the constituents of the bars. Therefore, the fire resistance of FRP-RC structures is an important issue that needs careful investigation before FRP reinforcement can be implemented in RC structures. The experimental results for full-scale FRP-RC beams subjected to specific fire action were presented and discussed in this paper. The specimens were exposed to heat in the mid-section from below (tension zone) and from the sides. As one of the main aims was to examine the influence of different reinforcement configurations, the testing was made for concrete beams reinforced with three different types of FRP bars: (i) basalt-FRP (BFRP), (ii) hybrid FRP with carbon and basalt fibres (HFRP) and (iii) nano-hybrid FRP (nHFRP), with modification of the epoxy matrix of the rebars. The present work describes the behaviour of FRP-RC beams exposed to fire conditions and simultaneous loading (50 % of their ultimate strength capacity at normal temperature) and unloaded beams were tested after the cooling phase in order to evaluate their residual resistance. Present work shows that the type of FRP bars used has a direct influence on the outcomes and the way of destruction. The maximum ductility, the longest heating time of approximately 100 minutes, was obtained for beams reinforced with BFRP bars and attained deflections were corresponded to the value of 162 mm.
    Źródło:
    Budownictwo i Architektura; 2020, 19, 4; 17-30
    1899-0665
    Pojawia się w:
    Budownictwo i Architektura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakterystyka odmian i materiałów hodowlanych życicy wielokwiatowej i mieszańcowej ze szczególnym uwzględnieniem odporności na rdzę koronową i pleśń śniegową
    Characteristic of Italian ryegrass and hybrid ryegrass cultivars and breeding materials with special emphasis on crown rust and snow mould resistance
    Autorzy:
    Czembor, Elżbieta
    Powiązania:
    https://bibliotekanauki.pl/articles/41326721.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    pleśń śniegowa
    rdza koronowa
    regeneracja po zimie
    użytkowanie kośno-polowe
    wartość rolnicza
    życica wielokwiatowa
    życica mieszańcowa
    agronomic value
    crown rust resistance
    hybrid ryegrass
    Italian ryegrass
    performance after winter
    snow mould resistance
    spring performance
    Opis:
    Badania prowadzono w latach 2004–2005. Łącznie scharakteryzowano 29 obiektów: 16 odmian europejskich życicy wielokwiatowej (Lolium multiflorum Lam.) i 3 odmiany życicy mieszańcowej (Lolium bouchenanum Kurth) oraz materiały polskie życicy wielokwiatowej: 2 odmiany (Gisel i Kroto), 2 rody i 6 pokoleń F3. Opisano 12 cech morfologicznych i fizjologicznych roślin wiążących się z wartością rolniczą w użytkowaniu kośnopolowym. Badane materiały zróżnicowano pod względem odporności na rdzę koronową w lipcu, sierpniu i we wrześniu, szerokości liścia, wysokości roślin, szacunkowego plonu zielonej masy oraz stanu roślin po zimie i zdolności do szybkiej regeneracji w okresie wczesnowiosennym. Analiza czynnikowa z rotacją Varimax za pomocą kryterium Kaisera pozwoliła dokonać podziału 12 zmiennych (badanych cech) na 3 czynniki główne świadczące o wartości rolniczej badanych materiałów oraz określić współzależności pomiędzy nimi. Szacunkowy plon zielonej masy istotnie łączył się z szerokością liści oraz wysokością badanych materiałów. Odmiany polskie oraz rody i materiały hodowlane tetraploidalnej życicy wielokwiatowej wykazywały niską odporność na rdzę koronową, ale szybciej regenerowały się po zimie w porównaniu od odmian zagranicznych. Większość odmian tetraploidalnych życicy wielokwiatowej charakteryzowały się wysokim szacunkowym plonem zielonej masy oraz podwyższoną odpornością na rdzę koronową. Na szczególną uwagę zasługują Tonyl, Domino i Tarandus, które dodatkowo szybko regenerowały się w okresie wczesnowiosennym. Wszystkie odmiany diploidalne życicy wielokwiatowej charakteryzowały się niskim szacunkowym plonem zielonej masy i źle regenerowały się po zimie.
    In the years 2004 and 2005, twenty nine cultivars and units of breeding materials were evaluated: 16 European Italian ryegrass cultivars (Lolium multiflorum Lam.), 3 hybrid ryegrass (Lolium bouchenanum Kurth) cultivars and Polish materials of Italian ryegrass: 2 cultivars (Gisel and Kroto), 2 strains and 6 progenies of F3 filial generation. Morphological and physiological characters connected with agronomic value were described. The material was differentiated in crown rust resistance in July, August and September, as well as in plant height, estimated green mass yield, performance after winter and early spring regeneration ability. Using the factor analysis method it was possible to divide 12 variables (the evaluated characters) into 3 principal components representing agronomic value of the tested materials and to determine relationships between them. Estimated green mass production was significantly correlated with leaf width and plant height. The Polish cultivars, strains and F3 progenies showed low crown rust resistance but high regeneration after winter. Most of the tetraploid European Italian ryegrass cultivars showed high estimated green mass production and high crown rust resistance. Especially promising were Tonyl, Domino and Tarandus which showed good regeneration after winter. All diploid European cultivars had low estimates of green mass production and weak regeneration after winter.  
    Źródło:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2007, 245; 249-266
    0373-7837
    2657-8913
    Pojawia się w:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing telecommunication contractor firms using a hybrid DEA-BWM method
    Autorzy:
    Valizadeh, Omid
    Ghiyasi, Mojtaba
    Powiązania:
    https://bibliotekanauki.pl/articles/29432383.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    performance assessment
    data envelopment analysis
    best worst method
    telecommunication contractor firm
    Opis:
    Telecommunication companies have an important role in technology development, so evaluating the performance of these companies has been an interest of managers. This article uses a hybrid method using data envelopment analysis (DEA) and the best-worst method (BWM) to measure the performance of communication companies. The hybrid DEA-BWM method is used for the weight determination and performance assessment of 17 telecommunication contractor firms in the Khorsan Razavi province of Iran. We considered four inputs: gross losses, sales cost, legal reserve, and fixed assets. On the other side, three outputs including operation income, operation profit, and retained earnings are considered as outputs. Considering the input-output parameters and using the hybrid method by seven selected criteria, we rank all contractor firms. We found that the BPM firm has the best performance while and GKS firm is found as the firm with the weakest performance. Compared with the classical DEA methods, we found more reliable results with higher discrimination power, using the hybrid DEA-BWM.
    Źródło:
    Operations Research and Decisions; 2023, 33, 4; 189--200
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza funkcjonowania pompy ciepła współpracującej z urządzeniami wykorzystującymi różne nośniki energii
    Performance analysis of a heat pump cooperating with devices using different energy sources
    Autorzy:
    Pater, S.
    Ciesielczyk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2073039.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    odnawialne źródła energii
    pompa ciepła
    kolektor słoneczny
    gruntowy wymiennik ciepła
    renewable energy sources
    heat pump
    solar collector
    ground heat exchanger
    hybrid installation
    Opis:
    Przedstawiono wybrane aspekty pracy pompy ciepła typu solanka/woda współpracującej z kolektorami słonecznymi oraz kotłem gazowym w instalacji hybrydowej w budynku mieszkalno-usługowym zlokalizowanym na obrzeżach Krakowa. Współpraca pompy ciepła z urządzeniami wykorzystującymi różne nośniki energii pozwoliła na uzyskanie wysokich wartości współczynnika SPF (sezonowego współczynnika efektywności) pompy ciepła w sezonach grzewczych. Dane doświadczalne otrzymano z instalacji pracującej w warunkach rzeczywistych nieprzerwanie od września 2011 roku.
    The paper presents selected operating aspects of brine/water heat pump cooperating with a solar collectors and gas condensing boiler in the hybrid installation mounted in a residential-service building located at Krakow outskirts. The cooperation of heat pump with devices utilizing various sources of energy allowed one to obtain high SPF (Seasonal Performance Factor) values of heat pump in heating seasons. The experimental data were obtained in the system continuously operating in real conditions since September 2011.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2016, 2; 68--69
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving security performance of healthcare data in the Internet of medical things using a hybrid metaheuristic model
    Autorzy:
    Ashok, Kanneboina
    Gopikrishnan, Sundaram
    Powiązania:
    https://bibliotekanauki.pl/articles/24866906.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    medical information system
    Internet of things
    electronic medical record
    information security
    metaheuristic optimization
    quality of service
    system informacji medycznej
    Internet rzeczy
    elektroniczna dokumentacja medyczna
    bezpieczeństwo informacji
    optymalizacja metaheurystyczna
    jakość usługi
    Opis:
    Internet of medical things (IoMT) network design integrates multiple healthcare devices to improve patient monitoring and real-time care operations. These networks use a wide range of devices to make critical patient care decisions. Thus, researchers have deployed multiple high-security frameworks with encryption, hashing, privacy preservation, attribute based access control, and more to secure these devices and networks. However, real-time monitoring security models are either complex or unreconfigurable. The existing models’ security depends on their internal configuration, which is rarely extensible for new attacks. This paper introduces a hybrid metaheuristic model to improve healthcare IoT security performance. The blockchain based model can be dynamically reconfigured by changing its encryption and hashing standards. The proposed model then continuously optimizes blockchain based IoMT deployment security and QoS performance using elephant herding optimization (EHO) and grey wolf optimization (GWO). Dual fitness functions improve security and QoS for multiple attack types in the proposed model. These fitness functions help reconfigure encryption and hashing parameters to improve performance under different attack configurations. The hybrid integration of EH and GW optimization models can tune blockchain based deployment for dynamic attack scenarios, making it scalable and useful for real-time scenarios. The model is tested under masquerading, Sybil, man-in-the-middle, and DDoS attacks and is compared with state-of-the-art models. The proposed model has 8.3% faster attack detection and mitigation, 5.9% better throughput, a 6.5% higher packet delivery ratio, and 10.3% better network consistency under attack scenarios. This performance enables real-time healthcare use cases for the proposed model.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2023, 33, 4; 623--636
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear PID controller parameter optimization using modified hybrid artificial bee colony algorithm for continuous stirred tank reactor
    Autorzy:
    Pugazhenthi, Nedumal
    Selvaperumal, S.
    Vijayakumar, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2128163.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    artificial bee colony
    stirred tank reactor
    genetic algorithm
    nonlinear PID
    controller performance measures
    sztuczna kolonia pszczół
    reaktor zbiornikowy z mieszadłem
    algorytm genetyczny
    PID nieliniowy
    miernik wydajności kontrolera
    Opis:
    The artificial bee colony (ABC) algorithm is well known and widely used optimization method based on swarm intelligence, and it is inspired by the behavior of honeybees searching for a high amount of nectar from the flower. However, this algorithm has not been exploited sufficiently. This research paper proposes a novel method to analyze the exploration and exploitation of ABC. In ABC, the scout bee searches for a source of random food for exploitation. Along with random search, the scout bee is guided by a modified genetic algorithm approach to locate a food source with a high nectar value. The proposed algorithm is applied for the design of a nonlinear controller for a continuously stirred tank reactor (CSTR). The statistical analysis of the results confirms that the proposed modified hybrid artificial bee colony (HMABC) achieves consistently better performance than the traditional ABC algorithm. The results are compared with conventional ABC and nonlinear PID (NLPID) to show the superiority of the proposed algorithm. The performance of the HMABC algorithm-based controller is competitive with other state-of-the-art meta-heuristic algorithm-based controllers in the literature.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; e137348, 1--10
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear PID controller parameter optimization using modified hybrid artificial bee colony algorithm for continuous stirred tank reactor
    Autorzy:
    Pugazhenthi, Nedumal
    Selvaperumal, S.
    Vijayakumar, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173628.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    artificial bee colony
    stirred tank reactor
    genetic algorithm
    nonlinear PID
    controller performance measures
    sztuczna kolonia pszczół
    reaktor zbiornikowy z mieszadłem
    algorytm genetyczny
    PID nieliniowy
    miernik wydajności kontrolera
    Opis:
    The artificial bee colony (ABC) algorithm is well known and widely used optimization method based on swarm intelligence, and it is inspired by the behavior of honeybees searching for a high amount of nectar from the flower. However, this algorithm has not been exploited sufficiently. This research paper proposes a novel method to analyze the exploration and exploitation of ABC. In ABC, the scout bee searches for a source of random food for exploitation. Along with random search, the scout bee is guided by a modified genetic algorithm approach to locate a food source with a high nectar value. The proposed algorithm is applied for the design of a nonlinear controller for a continuously stirred tank reactor (CSTR). The statistical analysis of the results confirms that the proposed modified hybrid artificial bee colony (HMABC) achieves consistently better performance than the traditional ABC algorithm. The results are compared with conventional ABC and nonlinear PID (NLPID) to show the superiority of the proposed algorithm. The performance of the HMABC algorithm-based controller is competitive with other state-of-the-art meta-heuristic algorithm-based controllers in the literature.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; art. no. e137348
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synergistic performance degradation of marine structural elements: case study of polymer-based composite and steel hybrid double lap joint
    Autorzy:
    Baykal, Halis Haluk
    Neser, Gokdeniz
    Powiązania:
    https://bibliotekanauki.pl/articles/34605780.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    wet-dry cycle
    double lap joint
    polymer composite-steel joints
    surface roughness
    aging in marine environment
    Opis:
    The degradation of structures under the influence of a marine environment tends to be rapid and disruptive compared to that of structures that are far away from these influences. Efforts to consider these impacts in the design phase are increasing, with a view to the construction of more sustainable structures. However, experimental data from which designers and builders can benefit cannot be found in the relevant literature, especially when it comes to the effects of composite degradation. In this study, we experimentally investigate the combined effects of degradation factors such as a drying-wetting cycle, the shape of the structure, the variety of materials used in the structure, and the differences in the manufacturing of the materials . The structure chosen as an example is a hybrid structural double lap joint composed of epoxy resin, fibreglass composite, and steel, which is widely used in ship structures. The experiments considered four aging periods (zero, 30, 60 and 90 days) under a wet-dry cycle in a programmable corrosion chamber, two overlap lengths (short and long), two surface roughnesses of the steel parts (50 and 90 μm), and two surface preparation alternatives (uncoated and coated with epoxy primer). The synergistic effects of these parameters on the tensile strength, deformation and toughness of the joints were evaluated, and suggestions are made for ship designers. The attention of interested parties, and particularly ship designers, is drawn to the comparative effects of these degradation agents on performance.
    Źródło:
    Polish Maritime Research; 2023, 3; 111-118
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of dietary arginine supplementation on body weight changes and productivity of sows
    Wpływ dodatku argininy w żywieniu loch na zmiany masy ciała i ich produkcyjność
    Autorzy:
    Bielinski, P.
    Rekiel, A.
    Wiecek, J.
    Sonta, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2884.pdf
    Data publikacji:
    2017
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    animal breeding
    animal feeding
    animal nutrition
    pig
    sow
    pregnant sow
    primiparous sow
    multiparous sow
    piglet
    body mass
    weight change
    animal productivity
    reproductive cycle
    reproduction result
    piglet rearing
    rearing performance
    hybrid
    feeding experiment
    arginine
    supplementation
    Opis:
    Effect of dietary arginine supplementation on body weight changes and productivity of sows.The objective of this study was to determine whether provision of additional arginine to pregnant and lactating sows could influence body weight changes in females during reproductive cycle as well as reproductive and rearing performance of the piglets. The study included 36 F1 crossbred sows (Polish Landrace ´Polish Large White), including 12 primiparous and 24 multiparous sows, which after insemination were randomly allocated to experimental group E (6 primiparous – P and 12 multiparous – M) and control group C (6 P and 12 M). Sows from both groups received complete diets, which were fed to meet requirements. Sows from group E were supplemented with amino acid (L-arginine 98%) at 0.3 kg/ton for pregnant sows (from 4 weeks after insemination) and at 0.5 kg/ton for lactating sows. C sows were not supplemented. Feeding group (C, E) had a significant effect on sow body weight at weaning (P ≤0.01), while lactation (P, M) had a significant effect on sow body weight at mating and weaning, and also on body weight change during the weaning-to-mating period (P ≤0.01). The number of piglets born to primiparous sows from group E vs C was higher by 1.3 piglets (11.11%) (P >0.05). 28-day-old weaned piglets, reared by primiparous sows, were significantly heavier than the progeny of multiparous sows (P ≤0.01), by 0.76 kg/animal (10.08%) in group C and by 0.97 kg/animal (12.63%) in group E. Piglets from group E vs C were heavier at weaning by 0.35 kg (4.22%) when born to primiparous sows, and by 0.14 kg (1.86%) when born to multiparous sows. No group ´lactation interaction has been shown for any of the parameters studied. It seems appropriate to supplement pregnant and nursing primiparous sows with dietary arginine.
    Wpływ dodatku argininy w żywieniu loch na zmiany masy ciała i ich produkcyjność.Celem badań było wykazanie czy dodatkowa podaż argininy w żywieniu loch prośnych i karmiących ma wpływ na zmiany masy ciała samic w cyklu reprodukcyjnym oraz wyniki rozrodu i odchowu prosiąt. Badaniami objęto łącznie 36 loch mieszańców F1 (pbz x wbp), w tym 12 pierwiastek i 24 wieloródki, które po inseminacji podzielono losowo na grupy: doświadczalną - E (6 pierwiastek - P i 12 wieloródek - M) i kontrolną - C (6 - P i 12 - M). Lochy z obu grup żywiono mieszankami pełnoporcjowymi, których podaż była zgodna z zapotrzebowaniem. Dla loch z grupy E zastosowano dodatek aminokwasu (L-arginina 98%), w ilości odpowiednio: 0.3 kg/tonę dla loch prośnych (od 4. tygodnia po inseminacji) i 0.5 kg/tonę dla loch karmiących. Lochy C nie otrzymywały w/w dodatku. Stwierdzono istotny wpływ grupy żywieniowej (C, E) na masę loch przy odsadzeniu (P ≤0.01) oraz laktacji (P, M) na masę loch przy kryciu, odsadzeniu i zmianę masy w okresie odsadzenie-krycie (P ≤0.01). Liczba prosiąt urodzonych przez pierwiastki z grupy E vs C była większa o 1.3 prosięcia (11.11%) (P >0.05). 28. dniowe, odsadzone prosięta, odchowywane przez lochy pierwiastki, były istotnie cięższe niż potomstwo loch wieloródek (P ≤0.01), w grupie C o 0.76 kg/szt. (10.08%), a w grupie E o 0.97 kg/szt. (12.63%). Prosięta z grupy E vs C pochodzące od pierwiastek były cięższe przy odsadzeniu odpowiednio o 0.35 kg (4.22%), a od wieloródek o 0.14 kg (1.86%). Nie wykazano interakcji grupa x laktacja dla wszystkich badanych wskaźników. Stosowanie dodatku argininy do paszy wydaje się być uzasadnione dla prośnych i odchowujących prosięta loch pierwiastek
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2017, 56[2]
    1898-8830
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-55 z 55

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies