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    Wyświetlanie 1-59 z 59
    Tytuł:
    Effect of matrine on reducing damage to bovine mammary epithelial cells induced by Staphylococcus aureus alpha-hemolysin
    Autorzy:
    Feng, F.
    Ma, W.W.
    Luo, H.X.
    Guan, C.P.
    Zhou, X.Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087720.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    α-hemolysin
    BMECs
    matrine
    cell damage
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 2; 409-413
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation on vessel intelligent collision avoidance based on artificial fish swarm algorithm
    Autorzy:
    Li, W.
    Ma, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/260153.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    simulation
    collision avoidance
    artificial fish swarm algorithm
    Opis:
    TAs the rapid development of the ship equipments and navigation technology, vessel intelligent collision avoidance theory was researched world widely. Meantime, more and more ship intelligent collision avoidance products are put into use. It not only makes the ship much safer, but also lighten the officers work intensity and improve the ship’s economy. The paper based on the International Regulation for Preventing Collision at sea and ship domain theories, with the ship proceeding distance when collision avoidance as the objective function, through the artificial fish swarm algorithm to optimize the collision avoidance path, and finally simulates overtaking situation, crossing situation and head-on situation three classic meeting situation of ships on the sea by VC++ computer language. Calculation and simulation results are basically consistent with the actual situation which certifies that its validity.
    Źródło:
    Polish Maritime Research; 2016, S 1; 138-143
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical research of the viscous effect of the bilge keel on the damping moment
    Autorzy:
    Deng, R.
    Duan, W.
    Ma, S.
    Ma, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/258868.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    calculation model
    viscous code
    phase difference
    damping mpment
    bilge keel
    Opis:
    Bilge keels are effective passive devices in mitigating the rolling motion, and the usage of them covers almost all the sea going vessels. This paper focuses on the viscous effect of the bilge keel, ignored the effect of the free surface and the effect of the ship hull, for the general viscous characteristic of the bilge keel. In order to investigate the viscous effect of the bilge keel on the total damping moment, a special 2 dimensional numerical model, which includes a submerged cylinder with and without bilge keels, is designed for the simulation of forced rolling. Three important factors such as bilge keels width, rolling periods, as well as maximal rolling angles are taken into account, and the viscous flow field around the cylinder is simulated by some codes based on the viscous method in different conditions, in which the three factors are coupled. Verification and validation based on the ITTC method are performed for the cylinder without bilge keels in the conditions of different rolling periods and maximal rolling angles. The primary calculation of damping moment induced by the cylinder with 0mm, 4mm, and 10mm width bilge keels shows some interesting results, and a systematic analysis is conducted. The analysis of the damping moment components suggests there is phase difference between the damping moment induced by the cylinder and the bilge keels, and when the bilge keels width reaches a special size, the total damping moment is mitigated. The calculation of the damping moments induced by the cylinder with some larger bilge keels are also performed, and the results suggest that, the damping moment induced by the bilge keels is increased rapidly and becomes the dominant part in the total damping moment while the width of the bilge keels are increased, but the damping moment induced by the cylinder is not changed significantly. Some illustration of the vortices formation and shedding is included, which is the mechanism of the damping moment caused by the bilge keels. The present work shows an interesting problem, and it is useful for the bilge keel design.
    Źródło:
    Polish Maritime Research; 2015, S 1; 67-74
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rynkowa konkurencyjność krajowego nasiennictwa zbóż w świetle konsolidacji spółek hodowli roślin ANR
    Market competitiveness of the national cereal seed industry given the consolidation of plant propagation companies under the Agricultural Property Agency
    Autorzy:
    Jerzak, M.A.
    Mikulski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/879330.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Ekonomiki Rolnictwa i Gospodarki Żywnościowej - Państwowy Instytut Badawczy
    Źródło:
    Zagadnienia Ekonomiki Rolnej; 2011, 3
    0044-1600
    2392-3458
    Pojawia się w:
    Zagadnienia Ekonomiki Rolnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Znaczenie dopłat do produkcji roślin strączkowych w odbudowie rynku rodzimych surowców białkowych pochodzenia roślinnego w Polsce
    The importance of subsidies for the production of grain legumes for reconstruction of the domestic market of protein raw materials of vegetable origin in Poland
    Autorzy:
    Jerzak, M.A.
    Mikulski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/879535.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Ekonomiki Rolnictwa i Gospodarki Żywnościowej - Państwowy Instytut Badawczy
    Opis:
    Całkowita produkcja rodzimego paszowego białka roślinnego wynosi 340 tys. ton. Stanowi to łącznie zaledwie 26% krajowego zapotrzebowania. Powstały deficyt wynoszący 960 tys. ton musi być uzupełniony importowaną śrutą sojową, aby możliwe było zapewnienie bezpieczeństwa paszowego dla pogłowia trzody chlewnej oraz drobiu, którego Polska jest największym w Europie eksporterem. W sytuacji tak znacznego uzależnienia od importu tego surowca uruchomiono działania interwencyjne, w ramach których uprawiający rośliny strączkowe mogą liczyć na dotowanie tej produkcji. Celem badań zaprezentowanych w niniejszym artykule była ocena wpływu dopłat UE do produkcji roślin strączkowych realizowanych do 2015 r. na rozwój rynku materiału siewnego oraz produkcji towarowej tych roślin w kraju. W wyniku badań stwierdzono, że dopłaty do produkcji roślin strączkowych uaktywniły segment rynku produkcji i sprzedaży materiału siewnego tych roślin. Przyczyniło się to do stopniowego zwiększania powierzchni zasiewów tych roślin w kraju, a jednocześnie zapewniło korzyści finansowe dla przedsiębiorstw nasiennych. Stwierdzono też, że w 2015 r. pomimo korzystnie kształtującego się dochodu rolniczego uzyskiwanego z produkcji rodzimych roślin strączkowych, to jednak w praktyce nie skłoniło to producentów rolnych do większego zainteresowania się tą uprawą jako produkcją towarową. Zauważono natomiast powszechne wykorzystywanie tego typu upraw jako przedplonu poprawiającego strukturę gleby i jej zasobność w azot. Za przyczynę takiej sytuacji uznano brak w kraju rynku nasion rodzimych roślin białkowych zdolnego zaspokoić wymagania popytowe przemysłu paszowego. Stąd też wynika brak zainteresowania tym surowcem ze strony przemysłu i marginalizację rodzimych źródeł paszowego białka roślinnego na rynku.
    Total production of the native protein feed plant is 340 thousand tonnes. This represents a total of just 26% of the domestic demand. The resulting deficit of 960 thousand tonnes must be supplemented with imported soybean meal to be able to ensure feed security and safety for the population of pigs and poultry, whose Poland is Europe’s largest exporter. In the event of such a significant dependence on imports of raw material, an intervention was launched under which subsidies are granted to cultivation of legumes. The aim of the research presented in this paper was to evaluate the effects of the EU subsidies for the production of legumes executed by 2015 on the development of the seed market and commodity production of these plants in Poland. The research found that subsidies for the production of legumes become an active segment of the market of production and sale of seed of these plants, it also contributed to the gradual increase in the sown area of these plants in Poland and simultaneously ensured financial benefits for seed companies. It was also found that in 2015, despite the positive formation of agricultural income derived from the production of native legumes, in practice it did not incline agricultural producers to greater interest in this crop as a commodity production. It was noted, however, that this crop was widely used as a forecrop, improving soil structure and nitrogen concentration. It was considered that this was caused by the lack of domestic market of seeds of native protein plants capable to meet the demand of the feed industry. This in turn caused lack of interest of the industry in the raw material and marginalization of domestic sources of vegetable feed protein on the market.
    Źródło:
    Zagadnienia Ekonomiki Rolnej; 2017, 2
    0044-1600
    2392-3458
    Pojawia się w:
    Zagadnienia Ekonomiki Rolnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rugose corals and brachiopods across the Frasnian-Famennian boundary in Central Hunan, South China
    Autorzy:
    Ma, X
    Sun, Y.
    Hao, W.
    Liao, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/21047.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    fossil distribution
    brachiopod fauna
    brahiopod
    Rugosa
    China
    rugose coral
    Ostracoda
    Brachiopoda
    Famennian
    Frasnian
    Devonian
    extinction
    coral
    paleontology
    Hunan
    Opis:
    We present taxonomic revision of rugose corals and brachiopods from several Frasnian–Fammenian (F–F) boundary sections in central Hunan Province, China. Diversity of shallow−water rugose corals gradually increased during the Frasnian, but ended with sudden extinction near the end of Frasnian. Ostracods were abundant during the Frasnian; their extinction coincided with anoxic deposition of the end−Frasnian black shale deposits. The early Famennian ostracod fauna is of low diversity. The brachiopod fauna of the late Frasnian (Palmatolepis rhenana and Pa. linguiformis zones) is dominated by atrypids, small−sized cyrtospiriferids, and the rhynchonellid Hunanotoechia. All atrypids disappeared before the F–F boundary with highest rates of extinction below the boundary (probably low in the Pa. linguiformis Zone). The Frasnian cyrtospiriferid fauna is also of low diversity and dominated by small taxa. All but one of the cyrtospiriferid taxa crossed the F–F boundary. The early Famennian post−extinction recovery brachiopod fauna was the result of rapid radiation of new forms shortly after the terminal Frasnian event. The early Famennian fauna is characterized by diverse cyrtospiriferids, abundant Yunnanellina and productoids. Above the early recovery fauna another fauna was recovered, with brachiopods Hunanospirifer and Yunnanella and is correlated with the late or latest Pa. crepida Zone. Sinalosia rugosa gen. et sp. nov. (Productida) is erected.
    Źródło:
    Acta Palaeontologica Polonica; 2002, 47, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Właściwości antykorozyjne żywic styrenowo-akrylowych zawierających tripolifosforan glinu
    Anticorrosive properties of styrene-acrylic resins containing aluminum tripolyphosphate
    Autorzy:
    Shangguan, L. J.
    Ma, W.
    Liu, G.
    Song, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/142544.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
    Tematy:
    żywice styrenowo-akrylowe
    tripolifosforan glinu
    właściwości antykorozyjne
    otrzymywanie
    styrene-acrylic resins
    aluminum tripolyphosphate
    anticorrosive properties
    preparation
    Opis:
    Tripolifosforan glinu zdyspergowano w emulsji styrenowo-akrylowej. Rozkład i wielkości cząstek lateksu badano za pomocą laserowego analizatora cząstek. Właściwości antykorozyjne układu żywice styrenowo-akrylowe – tripolifosforan glinu badano za pomocą elektrochemicznej spektroskopii impedacyjnej (EIS), próby w komorze solnej według normy ASTM B-117 oraz testów adhezji. Wyniki wskazują na wzmocnienie działania ochronnego żywic styrenowo-akrylowych po dodaniu tripolifosforanu glinu.
    Aluminum tripolyphosphate was introduced into the dispersion solution of styrene-acrylic emulsion The laser particle size analyzer was used to analyse the distribution and particles size of the latex particle. The anticorrosion performance of styrene-acrylic resins/aluminum tripolyphosphate was studied using electrochemical impedance spectroscopy (EIS), salt spray standard test according to ASTM B-117 and adhesion tests. The results indicated the protective performance of styrene-acrylic resins was improved by adding aluminum tripolyphosphate.
    Źródło:
    Chemik; 2015, 69, 9; 578-585
    0009-2886
    Pojawia się w:
    Chemik
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel process of dye wastewater treatment by linking advanced chemical oxidation with biological oxidation
    Autorzy:
    Zou, H.
    Ma, W.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/204846.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dye wastewater
    Fenton's oxidation
    biological oxidation
    biological aerated filter
    advanced oxidation processes
    Opis:
    Dye wastewater is one of typically non-biodegradable industrial effluents. A new process linking Fenton’s oxidation with biological oxidation proposed in this study was investigated to degrade the organic substances from real dye wastewater. During the combination process, the Fenton’s oxidation process can reduce the organic load and enhance biodegradability of dye wastewater, which is followed by biological aerated filter (BAF) system to further remove organic substances in terms of discharge requirement. The results showed that 97.6% of chemical oxygen demand (COD) removal by the combination process was achieved at the optimum process parameters: pH of 3.5, H22
    Źródło:
    Archives of Environmental Protection; 2015, 41, 4; 33-39
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    3-D simulation of vertical-axial tidal current turbine
    Autorzy:
    Zhang, Z.
    Ma, Y.
    Jiang, J.
    Liu, W.
    Ma, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/260421.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    tidal current energy
    vertical-axial turbine
    hydrodynamic performance
    CFD
    numerical simulation
    3-D effect
    Opis:
    Vertical-axial tidal current turbine is the key for the energy converter, which has the advantages of simple structure, adaptability to flow and uncomplex convection device. It has become the hot point for research and application recently. At present, the study on the hydrodynamic performance of vertical-axial tidal current turbine is almost on 2-D numerical simulation, without the consideration of 3-D effect. CFD (Computational Fluid Dynamics) method and blade optimal control technique are used to improve accuracy in the prediction of tidal current turbine hydrodynamic performance. Numerical simulation of vertical-axial tidal current turbine is validated. Fixed and variable deflection angle turbine are comparatively studied to analysis the influence of 3-D effect and the character of fluid field and pressure field. The method, put the plate on the end of blade, of reduce the energy loss caused by 3-D effect is proposed. The 3-D CFD numerical model of vertical-axial tidal current turbine hydrodynamic performance in this study may provide theoretical, methodical and technical reference for the optimal design of turbine.
    Źródło:
    Polish Maritime Research; 2016, 4; 73-83
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on interaction of APFs based on relative gain array
    Autorzy:
    Feng, X.
    Sun, T.
    Ma, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/141523.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    interaction effect
    relative gain array
    active power filter
    Norton equivalent
    LCL filter
    Opis:
    Different APFs (Active Power Filter) interact with each other when multiple APFs are connected to the grid, and the interactions deteriorate the control performance of APFs and even lead to system instability. This paper presents a method to analyze the dynamic interaction of multiple APFs in a weak grid. This method uses the Norton equivalent principle to establish the mathematical model of a single APF. The mathematical model of the multiple APFs connected to the grid is set up based on the single APF mode. The RGA (Relative Gain Array) principle is used to analyze the interactions among multiple APFs. Besides, this paper analyzes the effect of changing circuit parameters and controller parameters on the change of the interactions. The strategy of weakening and eliminating the interaction is proposed based on rational selection and combination of parameters. Analysis, along with time domain simulation and experimental results, is presented to verify the feasibility and effectiveness of the proposed method and strategy.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 1; 165-177
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the principles of global correlation at the continental Triassic on the tetrapods
    Zasady globalnej korelacji Triasu kontynentalnego na podstawie Tetrapoda
    Autorzy:
    Oczew, W.G.
    Szyszkin, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/22669.pdf
    Data publikacji:
    1989
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    History of the Triassic land vertebrates comprises three successive global epoches referred to as proterosuchian, kannemeyeroid and dinosaur ones. The earliest and the middle epoches are typified by the regional faunal sequence of East Europe. The proterosuchian time spans here the Neorhachitome and Parotosuchus faunas, the former being directly correlated with the Induan-Lower Olenekian, and the latter with the Upper Olenekian (Spathian). The Eryosuchus and Mastodonsaurus faunas of the kannemeyeroid epoch in East Europe are Middle Triassic in age and correspond to the Muschelkalk and Lettenkohle respectively. An evidence is brought for contemporaneity of the proterosuchian-kannemeyeroid biotic replacement in Laurasia and Gondwana. This implies the Middle Triassic age of the Cynognathus Zone of South Africa and its equivalents in South America. The bulk of Lystrosaurus fauna in Gondwana is suggested to range over the most of, or the whole, Early Triassic.
    Historia triasowych kręgowców lądowych na Ziemi obejmuje trzy kolejne epoki: epokę proterozuchów, kannemajeroidów i dinozaurów. Dwie pierwsze są reprezentowane przez regionalną sekwencję faunistyczną we wschodniej Europie. Epoka proterosuchów obejmuje tu faunę Neorhachitomi i faunę Parotosuchus. Pierwsza z nich koreluje się bezpośrednio z indem i dolnym olenekiem, druga — z górnym olenekiem (spat). Fauny Eryosuchus i Mastodonsaurus epoki kannemajeroidów we wschodniej Europie są środkowotriasowe i odpowiadają kolejno wapieniowi muszlowemu i Lettenkohle. W pracy podano dowody, że zastępowanie faun epok proterozuchów i kannemajeroidów nastąpiło równocześnie w Laurazji i na Gondwanie. To wskazuje, że zona Cynognathus w południowej Afryce i jej ekwiwalenty w Ameryce Południowej są środkowotriasowe. Przedstawiono sugestię, że większość fauny Lystrosaurus na Gondwanie obejmuje większą część, lub cały wczesny trias.
    Źródło:
    Acta Palaeontologica Polonica; 1989, 34, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control system design for multi-rotor MAV
    Autorzy:
    Wang, W.
    Ma, H.
    Sun, C.-Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/280407.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    MAV
    attitude control
    altitude control
    LQG
    memory based control
    Opis:
    Abstract MAVs (Micro Air Vehicles) have attracted more and more attention in recent years because of their wide applications, such as investigations of inhospitable environment, nuclear or hazardous material polluted regions and other inaccessible areas. In this paper, both attitude and altitude controls of a Quad-Rotor type MAV are discussed and analyzed. To stabilize the attitude, one order memory based controller is selected, the performance of which is independent of the detail model information, leading to enhanced robustness. While for the altitude, a Linear Quadratic Gaussian (LQG) controller is proposed. The experimental results of the real flight demonstrate the stability and robustness of the controllers.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2013, 51, 4; 1027-1038
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie psychrometru Peltiera do pomiaru potencjalu wody - prototyp przyrzadu pomiarowego
    Autorzy:
    Skierucha, W
    Sobczuk, H.
    Malicki, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402592.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    woda glebowa
    potencjal wodny
    przyrzady pomiarowe
    termozlacza
    psychrometr Peltiera
    water soil
    water potential
    measurement device
    thermocouple
    Peltier psychrometer
    Źródło:
    Acta Agrophysica; 2001, 53; 125-134
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dendroflora wysp leśnych w krajobrazie rolniczym Warmii i Mazur
    Dendroflora of forest islands in the agricultural landscape of Warmia and Mazury
    Autorzy:
    Fenyk, M.A.
    Kuszewska, K.
    Szumarski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009475.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Warmia
    Mazury
    krajobraz rolniczy
    zadrzewienia srodpolne
    wyspy lesne
    wawozy srodpolne
    flora
    drzewa
    wykaz gatunkow
    dendroflora
    mid−field woodlots
    forest ravines
    mid−field ravines
    Opis:
    Study on dendroflora of 61 different types of mid−field woodlots and 5 mid−forest ravines was conducted in the years 1998–2008. Total of 57 native and 35 alien species were recorded. The greatest species richness and diversity characterized woodlots located in agricultural fields, while mid−field ravines showed the highest similarity to forest ravines where 5 protected species were noted.
    Źródło:
    Sylwan; 2010, 154, 05; 341-346
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Speech emotion recognition based on sparse representation
    Autorzy:
    Yan, J.
    Wang, X.
    Gu, W.
    Ma, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/177778.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    speech emotion recognition
    sparse partial least squares regression SPLSR
    SPLSR
    feature selection and dimensionality reduction
    Opis:
    Speech emotion recognition is deemed to be a meaningful and intractable issue among a number of do- mains comprising sentiment analysis, computer science, pedagogy, and so on. In this study, we investigate speech emotion recognition based on sparse partial least squares regression (SPLSR) approach in depth. We make use of the sparse partial least squares regression method to implement the feature selection and dimensionality reduction on the whole acquired speech emotion features. By the means of exploiting the SPLSR method, the component parts of those redundant and meaningless speech emotion features are lessened to zero while those serviceable and informative speech emotion features are maintained and selected to the following classification step. A number of tests on Berlin database reveal that the recogni- tion rate of the SPLSR method can reach up to 79.23% and is superior to other compared dimensionality reduction methods.
    Źródło:
    Archives of Acoustics; 2013, 38, 4; 465-470
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Test studies of the resistance and seakeeping performance of a trimaran planing hull
    Autorzy:
    Ma, W.
    Sun, H.
    Zou, J.
    Zhuang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/259495.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    trimaran planing hull
    appendix
    resistance
    seakeeping
    model test
    Opis:
    Towing tank tests in calm water were performed on a trimaran planing hull to verify its navigational properties with different displacements and centres of gravity, as well as to assess the effects of air jets and bilge keels on the hull’s planing capabilities, and to increase the longitudinal stability of the hull. Hydrostatic roll tests, zero speed tests, and sea trials in the presence of regular waves were conducted to investigate the hull’s seakeeping ability. The test results indicate that the influence of the location of the centre of gravity on the hull resistance is similar to that of a normal trimaran planing hull; namely, moving the centre of gravity backward will reduce the resistance but lower the stability. Bilge keels improve the longitudinal stability but slightly affect the resistance, and the presence of air jets in the hull’s channels decreases the trim angle and increases heaving but has little effect on the resistance. Frequent small-angle rolling occurs in waves. The heaving and pitching motions peak at the encounter frequency of , and the peaks increase with velocity and move towards greater encounter frequencies. When the encounter frequency exceeds, the hull motion decreases, which leads to changes in the navigation speed and frequency.
    Źródło:
    Polish Maritime Research; 2015, 1; 22-27
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Test research on the resistance performance of high-speed trimaran planing hull
    Autorzy:
    Ma, W.
    Sun, H.
    Zou, J.
    Yang, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/259708.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    trimaran planing hull
    side hulls
    high speed
    step
    resistance
    model test
    Opis:
    In order to identify high-speed navigation ability of trimaran planing hull, as well as investigate the characteristics of its resistance and hull form, ship model tests were conducted to measure resistance, trim and heaving under different displacements and gravity centre locations. The test results were then used to study the influence of spray strips on resistance and sea-keeping qualities. Moreover, different planning surfaces were compared in the model tests which helped to look into influence of steps on hull resistance and its moving position. Also, the resistance features of monohull and trimaran planing hulls, both with and without steps, were compared to each other. From the tests it can be concluded that: the two auxiliary side hulls increase aerodynamic lift at high-speed motion, which improves the hydrodynamic performance; the trimaran planing hull has also excellent longitudinal stability and low wave-making action; when Fr∇> 8, its motion is still stable and two distinct resistance peaks and two changes of sailing state (the second change is smaller) appear; spray strips are favourable for sea-keeping qualities at high speed. The change trends before the second resistance peak as to the resistance and sailing behaviour of trimaran planing hull without steps are the same as for monohull planing hull without steps. but when steps in both hulls exist the change trends are different; more specifically: trimaran planing hull with steps has only one resistance peak and its resistance increases along with its speed increasing, and the resistance is improved at the increasing speed as the number of steps increases.
    Źródło:
    Polish Maritime Research; 2013, 4; 45-51
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determining bulk electrical conductivity of soil from attenuation of electromagnetic pulse
    Autorzy:
    Malicki, M.A.
    Kokot, J.
    Skierucha, W.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/26177.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    electromagnetic pulse
    electrical conductivity
    soil
    soil salinity
    Źródło:
    International Agrophysics; 1998, 12, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crinoids from the Silurian of Western Estonia
    Autorzy:
    Ausich, W.I.
    Wilson, M.A.
    Vinn, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/21031.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    crinoid
    Silurian
    Western Estonia
    Estonia
    Echinodermata
    Crinoidea
    Pridoli
    paleontology
    new species
    Calceocrinus balticensis
    Desmidocrinus laevigatus Eucalyptocrinites tumidus
    Saaremaacrinus estoniensis
    Opis:
    The Silurian crinoids of Estonia are re−evaluated based on new collections and museum holdings. Nineteen species−level crinoid taxa are now recognized. All crinoid names applied to Estonian Silurian crinoids during the middle 19th century are disregarded. Especially significant is the fauna reported herein from the Pridoli because coeval crinoids are very poorly known from the Baltic region and elsewhere. One new genus and four new species are described from Estonia, namely Calceocrinus balticensis sp. nov., Desmidocrinus laevigatus sp. nov., Eucalyptocrinites tumidus sp. nov., and Saaremaacrinus estoniensis gen. et sp. nov.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An optimization approach to the intermodal transportation network in fruit cold chain, considering cost, quality degradation and carbon dioxide footprint
    Autorzy:
    Ma, Q.
    Wang, W.
    Peng, Y.
    Song, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/260179.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    intermodal transport network
    quality model
    refrigerated container
    fruit cold chain
    integer linear programming
    Opis:
    This model optimizes port hinterland intermodal refrigerated container flows , considering both cost and quality degradation, which is distinctive from the previous literature content in a way that it quantifies the influence of carbon dioxide (CO2) emission in different setting temperature on intermodal network planning. The primary contribution of this paper is that the model is beneficial not only to shippers and customers for the novel service design, but also offer , for policy-makers of the government, insights to develop inland transport infrastructures in consideration of intermodal transportation. The majority of models of multimodal system have been established with an objective of cost minimization for normal commodities. As the food quality is possible to be influenced by varying duration time required for the storage and transportation, and transportation accompanied with refrigeration producing more CO2 emission, this paper aims to address cost minimization and quality degradation minimization within the constraint of CO2 footprint. To achieve this aim, we put the quality degradation model in a mixed-integer linear programming model used for intermodal network planning for cold chain. The example of Dalian Port and Yingkou Port offer insight into trade-offs between transportation temperature and transport mode considering CO2 footprint. Furthermore, the model can offer a useful reference for other regions with the demand for different imported food, which requires an uninterrupted cold chain during the transportation and storage.
    Źródło:
    Polish Maritime Research; 2018, 1; 61-69
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The multiple dimension of water in the designing and governance of public spaces. The case of Shanghai West Bund Project compared to other Western Waterfronts renovations
    Autorzy:
    Semprebon, G.
    Ma, W.
    Fabris, L. M. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/344724.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Krakowska im. Tadeusza Kościuszki. Wydział Architektury. Katedra Kształtowania Środowiska Mieszkaniowego
    Tematy:
    Shanghai
    West Bund
    waterfront
    urban regeneration
    Szanghaj
    nabrzeże
    rewitalizacja obszarów miejskich
    Opis:
    In 2010, the municipality of Shanghai started the “Huangpu River Comprehensive Development Plan”, a large regeneration initiative including the Expo site, targeted to revitalize the river banks and generally the urban environment, making Xuhui waterfront one of the six key construction areas of the 12th Five-Year Plan in Shanghai. Formerly one of the largest industrial districts, the so-called West Bund area has experienced a process of substantial transformation, currently still ongoing. Particular attention has been paid to the rehabilitation of the riverside, as a source of landscape enhancement, providing a system of open spaces and public facilities able to meet the dweller’s demands and to attract touristic fluxes. For this reason, the West Bund Project represents one of the most relevant regeneration initiative currently taking place in Shanghai. This paper aims to investigate, starting from this specific case-study, the role of water in the definition of cultural and natural elements, revealing new perspectives for the revitalization of the urban environment.
    Źródło:
    Środowisko Mieszkaniowe; 2018, 22; 22-27
    1731-2442
    2543-8700
    Pojawia się w:
    Środowisko Mieszkaniowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cenomanian cephalopods from the Glauconitic Limestone southeast of Esfahan, Iran
    Głowonogi z wapienia glaukonidowego południowowschodniego Isfahanu, Iran
    Autorzy:
    Kennedy, W.J.
    Chahida, M.R.
    Djafarian, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/23206.pdf
    Data publikacji:
    1979
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Źródło:
    Acta Palaeontologica Polonica; 1979, 24, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on the sustainable management framework and the economic value evaluation for Taiwan reservoir watershed
    Badania struktury zrownowazonej gospodarki oraz ocena wartosci ekonomicznej zlewni zbiornikow wodnych na Tajwanie
    Autorzy:
    Lu, S -H
    Peng, S.-H.
    Ma, H.-W.
    Powiązania:
    https://bibliotekanauki.pl/articles/81829.pdf
    Data publikacji:
    2010
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    sustainable management
    economic value
    Taiwan
    reservoir
    watershed
    valuation method
    Opis:
    Recently lack of sustainable management for the reservoir watershed becomes a predicament for the water issues in Taiwan. The study tried to recognize the framework of the sustainable management of the Taiwan reservoir watershed and its key factors by using the analytic hierarchy process and the Delphi method. Through the identification questionnaires and the CVM (contingent valuation method), it also discussed the gap of expert and public for the identification of satisfaction, environmental protection and the potential value for the recent reservoir watershed. However, the results showed that the “natural stability” is the significant factor in the first level and the “Nature resources conservation” and “Water storage amount” are the most important factors for the detailed level. In addition, the expert opinions were not proved by public identification, and the present governance budgets are too low to respond to the potential values of public expectancy.
    W pracy przedstawiono wyniki badań przeprowadzonych dla określenia hierarchii ważności czynników ekologicznych, ekonomicznych i socjalnych związanych ze zrównoważonym zagospodarowaniem zlewni zbiorników wodnych na Tajwanie. W badaniach zastosowano metodę ankietową, w której respondenci stosując pięciostopniową skalę mieli wskazać ważność 22 określonych przez ekspertów czynników związanych z ochroną i zrównoważonym korzystaniem z zasobów środowiska, wpływających na standard życia mieszkańców oraz możliwości rozwoju gospodarczego na obszarze zlewni zbiorników wodnych. Stwierdzono, że najważniejsze znaczenie dla ludności mają czynniki ekologiczne, w szczególności zapewnienie stabilności przyrodniczej poprzez zachowanie bioróżnorodności oraz ochrony zasobów naturalnych, w tym ilości retencjonowanej wody.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 219-225
    0208-5771
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena wielkości wymywania jonów K+, Ca2+ i Mg2+ w wybranych drzewostanach w warunkach kwaśnej depozycji
    Assessment of K+, Ca2+ and Mg2+ volume leaching in selected tree stands under conditions of acidic deposition
    Autorzy:
    Kozłowski, R.
    Jóźwiak, M.
    Jóźwiak, M.A.
    Bochenek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008701.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gory
    Gory Swietokrzyskie
    Beskid Niski
    pogorze
    drzewostany
    sklad gatunkowy
    jony wapnia
    jony magnezu
    jony potasu
    wymywanie jonow
    depozycja kwasna
    zanieczyszczenia powietrza
    zanieczyszczenia chemiczne
    opady atmosferyczne
    odczyn opadow atmosferycznych
    acid deposition
    forest ecosystems
    canopy leaching
    throughfall
    stemflow
    Opis:
    The study was conducted in the central part of the Świętokrzyskie Mountains as well as in the Beskid Niski Mountains in the years 2008−2010. Canopy budget model according to Ulrich was used. Paper presents analysis and assessment of the differences between two forest ecosystems under of acidic deposition.
    Źródło:
    Sylwan; 2012, 156, 08; 607-615
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Samoocena wiedzy, umiejętności zawodowych i kompetencji społecznych studentów podstawą ewaluacji programu studiów kierunku turystyka i rekreacja
    Self-assessment of knowledge, professional skills and social competence of students as a basis for the evaluation of the curriculum of tourism and recreation studies
    Autorzy:
    Lubkowska, W.
    Nadobnik, J.
    Tarnowski, M.
    Nowak, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/5031.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
    Tematy:
    szkoly wyzsze
    studenci
    kierunki studiow
    turystyka
    rekreacja
    wiedza
    umiejetnosci zawodowe
    kompetencje spoleczne
    samoocena
    rynek pracy
    Opis:
    Celem pracy była analiza samooceny wiedzy, umiejętności zawodowych i kompetencji społecznych studentów kierunku turystyka i rekreacja oraz wskazanie możliwości modyfikacji i wzbogacenia programów kształcenia. Badaniami, w roku akademickim 2015/2016, objęto 88 studentów kierunku turystyka i rekreacja Wydziału Kultury Fizycznej i Promocji Zdrowia Uniwersytetu Szczecińskiego. Zastosowano metodę sondażu diagnostycznego, z wykorzystaniem techniki ankiety (kwestionariusz własnego autorstwa), wywiadu nieskategoryzowanego i obserwacji. Do wnioskowania statystycznego użyto standardowych metod statystycznych: frekwencji cech oraz testu niezależności chi-kwadrat. Wyniki badań w zakresie samooceny wiedzy, kompetencji zawodowych i społecznych respondentów odniesiono do ich identyfikacji z kierunkiem studiów. Stwierdzono, że większość studiujących turystykę i rekreację identyfikowała się z wybranym kierunkiem. Poziom samooceny wiedzy studentów – zwłaszcza z zakresu specjalności – nie był wysoki. Zaobserwowano związek między poziomem identyfikacji a samooceną umiejętności i kompetencji. Studenci mocnej identyfikujący się z kierunkiem studiów wyżej oceniali swoje umiejętności zawodowe oraz kompetencje społeczne.
    The aim of this study is an analysis of self-assessment of professional skills and competences of Tourism and Recreation students, as well as an attempt to indicate the possible uses of education mechanisms to modify and enrich curricula so that they take into account the need to develop students’ social skills. The research used a diagnostic survey method. Subjects included 88 students of the Faculty of Physical Culture and Health Promotion at the University of Szczecin. Qualitative and quantitative analysis of results was based on standard statistical methods: incidence of features, a Chi-squared test and a multi-dimensional correspondence analysis. Most students of Tourism and Recreation identified with their chosen field of study. Self-assessment of students’ knowledge – especially in terms of their major – was not high. There was a correlation between identifying oneself with the field of study and self-assessment of competences. Students who identified with their field of study more, reported higher self-assessment of their competences. Efforts to adapt the curriculum to the level of preparedness of candidates and the needs of the labor market correlate with the obtained results. These efforts should bring the desired effect of increased competences, whose deficit was detected during the research.
    Źródło:
    Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna; 2017, 16, 4
    1895-8680
    Pojawia się w:
    Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving quality attributes of tomato during cold storage by preharvest foliar application of calcium chloride and potassium thiosulfate
    Autorzy:
    Semida, W.M.
    Emara, A.E.
    Barakat, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/10960.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2019, 76
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical simulations of linearly stratified flow past submerged bodies
    Autorzy:
    Ma, W.
    Li, Y.
    Ding, Y.
    Hu, K.
    Lan, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/259150.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    stratified flow
    circular cylinder
    internal wave
    Suboff
    equation of state
    Opis:
    In this study, a methodology was presented to predict density stratified flows in the near-field of submerged bodies. The energy equation in temperature form was solved coupled with momentum and mass conservation equations. Linear stratification was achieved by the definition of the density as a function of temperature. At first, verifications were performed for the stratified flows passing a submerged horizontal circular cylinder, showing excellent agreement with available experimental data. The ability of the method to cope with variable density was demonstrated. Different turbulence models were used for different Re numbers and flow states. Based on the numerical methods proposed in this paper, the stratified flow was studied for the real scale benchmark DAPRA Suboff submarine. The approach used the VOF method for tracing the free surface. Turbulence was implemented with a k − ω based Detached Eddy Simulation (DES) approach. The effects of submarine speed, depth and density gradient on the free surface wave pattern were quantitatively analyzed. It was shown that, with the increasing of the speed of the submarine, the wavelength and wave height of the free surface wave were gradually increasing. The wave height of the free surface wave was gradually reduced as the submarine’s depth increased. Relative to the speed and submarine depth, the changes of the gradient density gradient have negligible effects on the free surface wave field.
    Źródło:
    Polish Maritime Research; 2018, S 3; 68-77
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oviraptorosaur tail forms and functions
    Autorzy:
    Persons,IV, W.S.
    Currie, P.J.
    Norell, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/945893.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Dinosauria
    paleozoology
    Theropoda
    Oviraptorosauria
    oviraptorosaur
    pygostyle
    caudal musculature
    functional morphology
    Opis:
    Oviraptorosaur caudal osteology is unique among theropods and is characterized by posteriorly persistent and exceptionally wide transverse processes, anteroposteriorly short centra, and a high degree of flexibility across the pre-pygostyle vertebral series. Three-dimensional digital muscle reconstructions reveal that, while oviraptorosaur tails were reduced in length relative to the tails of other theropods, they were muscularly robust. Despite overall caudal length reduction, the relative size of the M. caudofemoralis in most oviraptorosaurs was comparable with those of other non-avian theropods. The discovery of a second Nomingia specimen with a pygostyle confirms that the fused terminal vertebrae of the type specimen were not an abnormality. New evidence shows that pygostyles were also present in the oviraptorosaurs Citipati and Conchoraptor. Based on the observed osteological morphology and inferred muscle morphology, along with the recognition that many members of the group probably sported broad tail-feather fans, it is postulated that oviraptorosaur tails were uniquely adapted to serve as dynamic intraspecific display structures. Similarities, including a reduced vertebral series and a terminal pygostyle, between the tails of oviraptorosaurs and the tails of theropods widely accepted as basal members of the Avialae, appear to be convergences.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 3; 553-567
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of thinning on Pinus pinea L. development and physico-chemical soil characteristics in northwestern Tunisia: modeling of radial growth under thinning intensity
    Autorzy:
    Jaouadi, W.
    Mechergui, K.
    Riahi, M.A.
    Khouja, M.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077939.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Pinion pine
    silviculture
    thinning intensity
    stem volume
    radial growth
    cones production
    Opis:
    In this study, the potential beneficial impacts that the thinnings intensity on stand behavior and soil properties are also studied. This study was designed to test the hypothesis that thinning to various stand densities at young age enhance productivity of wood, cones and the physicochemical characteristics of the soil in Pinus pinea stands. We based our study on four thinning intensity (30, 40, 50 and 65%) in comparison with the control plot. The study was supplemented by a haracterization of radial growth of trees under the four thinning intensity. It was based on a complete randomized experimental field installed in 1994 in Tabarka forest, in Tunisia. For the radial growth analysis, three cores were taken from 125 trees at a rate of one tree per plot.The study showed that thinning has a significant effect on all dendrometric parameters. They revealed that a thinning intensity of 65% produces the best wood production (180.710 m3/ha), in annual growth in volume (4.634 m3/ha/year) and cone production (1211 cones/ha) compared to other thinning and control plot. Associated vegetation was also influenced by thinning intensities. The physicochemical characteristics of the soil were improved by thinning compared with the control. Signif- icant radial growth thinning was recorde especially in a thinning of 65% intensity (increases of 3.5 to 6.1 mm/year) compared to the control (1.1 to 2 mm/year). A strong relationship between radial growth and age was recorded at Thinning 4 (R2 = 0.923). These results can be used as an initial basis to refine silvicul- ture of pinion pine in order to improve stand productivity in Tunisia in wood and especially in cones given their importance on the world market.
    Źródło:
    Dendrobiology; 2018, 80; 70-80
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    One-dimensional isothermal multicomponent diffusion-reaction model and its application to methanol synthesis over commercial Cu-based catalyst
    Autorzy:
    Lei, K.
    Ma, H.
    Zhang, H.
    Ying, W.
    Fang, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/778972.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    global kinetics
    internal effectiveness factor
    diffusion-reaction model
    methanol synthesis
    Opis:
    The present work was a study on global reaction rate of methanol synthesis. We measured experimentally the global reaction rate in the internal recycle gradientless reactor over catalyst SC309. The diffusion-reaction model of methanol synthesis was suggested. For model we chose the hydrogenation of CO and CO2 &enspas key reaction. CO and CO2 &enspwere key components in our model. The internal diffusion effectiveness factors of CO and CO2&enspin the catalyst were calculated by the numerical integration. A comparison with the experiment showed that all the absolute values of the relative error were less than 10%. The simulation results showed that decreasing reaction temperature and catalyst diameter were conducive to reduce the influence of the internal diffusion on the methanol synthesis.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 1; 103-109
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration
    Autorzy:
    Bai, Z.
    Ma, H.
    Zhang, H.
    Ying, W.
    Fang, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/779378.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    dimethyl ether
    methanol dehydration to DME
    process simulation
    Opis:
    The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for dimethyl ether (DME) synthesis is built on PRO/II platform based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR model of vapor phase. In order to validate the proposed model, the simulation results have been compared with the available data from a set of industrial production equipment with a production capacity of 200 000 tonnes per annum. A comparison between the calculated and measured results has proved that these results are satisfactory. The bed height and the volume of the catalytic bed are calculated aim at one million t/a DME yields and while taking account of high-purity DME production. After discussing the influence of feed stage location and reflux ratio for DME product purity, the suitable unit operation conditions are chosen. Accordingly, accurate process simulation results provide the basis and guidance for an improvement and development of the similar industrial device.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 2; 122-127
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of preparation method on the performance of PtSn/Al2O3 &enspcatalysts for acetic acid hydrogenation
    Autorzy:
    Zhang, K.
    Zhang, H.
    Ma, H.
    Ying, W.
    Fang, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/779525.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Pt-Sn catalysts
    preparation method
    acetic acid hydrogenation
    XPS
    CO-FTIR
    Opis:
    PtSn/Al2O3 &enspcatalysts with a given loading of 1 wt% Pt and 1 wt% Sn were prepared by co-impregnation or successive impregnation with aqueous solutions of Pt, Sn precursors and a commercial alumina. The catalysts were characterized by N2 &enspadsorption, H2-TPR (H2&ensp temperature-programmed reduction), H2-pulse chemisorption, XPS (X-ray photoelectron spectroscopy) and CO-FTIR (Fourier transform infrared spectroscopy), and tested in the hydrogenation of acetic acid. The results showed that the preparation method affected both the chemical properties and their performance in the hydrogenation of acetic acid. Sn enrichment on the catalysts surface was observed on the co-impregnated catalyst and catalyst in which the Pt precursor had been loaded first. It was found that the modification of Pt was a function of the sequence of Sn addition as revealed by CO-FTIR. Co-impregnated catalyst showed the highest activity and ethanol selectivity.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 1; 11-17
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Converged ultra-wideband and multi-level wired signal downstream transport over single wavelength in wavelength-division multiplexing passive optical network
    Autorzy:
    Ma, H
    Wang, F.
    Wang, W.
    Zhang, X
    Yu, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/174929.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ultra-wideband (UWB)
    multi-level amplitude switch keying (M-ASK)
    wavelength-division multiplexing passive optical network (WDM-PON)
    Opis:
    Simultaneous providing services of ultra-wideband and wired signal over single wavelength can greatly decrease the complexity and reduce the costs of a wavelength-division multiplexing passive optical network. However, ultra-wideband signal occupies the spectrum range from 3.1 to 10.6 GHz, and a narrow idle frequency band (from 0 to 3.1 GHz) could be employed to transport wired signal with a limited rate. In this paper, we proposed a scheme to simultaneously provide ultra-wideband and wired services, in which the information rate of the wired signal is enhanced by employing a multi-level amplitude switch keying signal in the idle frequency band formed by ultra-wideband signal. In comparison with other advanced modulation formats used for wavelength-division multiplexing passive optical networks such as orthogonal frequency division multiplexing, multi-level amplitude switch keying signal can be easily received by using intensity modulation direct detection, which will greatly reduce the cost of end-users. Especially, if a multi-band ultra-wideband signal is substituted for the direct-sequence ultra-wideband signal, the available spectrum range to transport wired signal will be easily extended to 5 GHz as multi-band ultra-wideband signal has a narrower spectrum width and flexible center frequency, so 4-amplitude switch keying signal with a rate of 5 Gbaud will achieve an information rate of 10 Gbit/s.
    Źródło:
    Optica Applicata; 2015, 45, 4; 433-445
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EGTA, a calcium chelator, affects cell cycle and increases DNA methylation in root tips of Triticum aestivum L.
    Autorzy:
    Zhang, C.
    Shi, W.
    Ma, K.
    Li, H.
    Zhang, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/57455.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    In this study, when germinated Triticum aestivum L. seeds were treated with 0, 2, 4 and 6 mM ethyl glycol tetraacetic acid (EGTA), root growth was suppressed and the mitotic index decreased. These inhibitory effects were positively correlated with EGTA concentration. RT-PCR analysis revealed that the expression of several gene markers related to the G1/S transition of the cell cycle were significantly downregulated. Confocal microscopy of Fluo-3/AM-stained roots showed chelation of nearly all of the Ca2+ within the root meristematic regions. Both random amplified polymorphic DNA (RAPD) and coupled restriction enzyme digestion-random amplification (CRED-RA) techniques showed significant increases in the levels of genomic DNA polymorphisms and degree of DNA methylation. The study provides information concerning the impact of Ca²+) chelator, EGTA, on the growth, expression of cell cycle transition marker genes, and changes in DNA structure and methylation in the wheat roots.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2016, 85, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of boron on ZSM-5 catalyst for methanol to propylene conversion
    Autorzy:
    Xu, A.
    Ma, H.
    Zhang, H.
    Ying, W.
    Fang, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/777971.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    methanol to propylene
    ZSM-5
    boron modifi cation
    propylene
    Opis:
    B-ZSM-5 catalysts were prepared by various modification methods with boric acid, including ion-exchange, impregnation and direct synthesis. The catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), NH3-Temperature Programmed Desorption (NH3-TPD), N2 adsorption-desorption, Fourier Transform Infrared spectrometry (FT-IR), 27Al and 11B MAS NMR spectra. The results revealed that the weak acidity of catalysts was significantly increased by modification. The catalytic activity was measured in a fixed bed at 460°C for methanol to propylene (MTP) reaction. The results of MTP reaction showed a great increment of the propylene selectivity for the boron modified samples, especially for the directly synthesized B-ZSM-5 which also displayed high activity and selectivity towards C2 =-C4 = olefins. It was found that the remarkable selectivity strongly depended on the intensity of weak acidity.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 4; 95-101
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy feature of a multi-flow column flotation process
    Autorzy:
    Cheng, G.
    Yu, Y.
    Ma, L.
    Xia, W.
    Xu, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/109768.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flotation column
    turbulent kinetic energy
    turbulent dissipation rate
    bubble
    Opis:
    A cyclonic-static micro-bubble flotation column (FCSMC) has been widely used in mineral separation. FCSMC includes countercurrent, cyclone and jet flow mineralization zones in a single column. In this study, the energy feature of the three different zones was compared. The turbulent flow was evaluated in terms of the turbulent kinetic energy (k) and the turbulent dissipation rate (ε). An appropriate computing model was determined by comparing the flow field value measured by PIV with the results of the Fluent numerical simulation. Jet flow separation exhibited the maximum k and ε values among the three columns, whereas counter-current separation displayed the minimum values. The high circulating volumetric flowrate means great energy input and turbulent intensity. The higher turbulent dissipation rate, the smaller the bubble is. The better performance of the FCSMC was mainly attributed to the multiple mineralization steps. The floatability of mineral particles gradually decreases with an increase in flotation time, the mineralization energy gradually increased to overcome the decrease in mineral floatability. By contrast, the countercurrent was beneficial for recovering the coarse particles, and the jet flow was beneficial for recovering the fine particles.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1266-1284
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological and molecular differentiation between Egyptian species of Pancratium L. (Amaryllidaceae)
    Autorzy:
    El-Hadidy, A.
    El-Ghani, M.A.
    Amer, W.
    Hassan, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/19349.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Three problems in the taxonomy of Pancratium in Egypt are the lack of publications, a lack of clarity about the relationships between recently distinguished species, and the lack of markers for examining the levels and patterns of variation in rare and endemic species; the latter hinders work in plant conservation genetics. In this study we reassessed the taxonomic status of the Pancratium species of Egypt, and examined morphological and genetic variation within and between species, using specimens from different populations collected throughout its distribution range in the country. Our assessment was based on 38 macromorphological characters mainly representing vegetative parts, flowers, fruits and seeds, in addition to RAPD data. The results revealed five morphologically distinguished Pancratium species in Egypt, of which P. trianthum Herb. is newly recorded. Species identification was confirmed by two phenetic dendrograms generated with 26 quantitative morphological characters and RAPD data, while species delimitation was verified by principal component analysis. The diagnostic floral characters are those of the perianth, corona teeth, pistil, stamens, aerial scape, spathe, and number of flowers. The retrieved RAPD polymorphic bands show better resolution of the morphologically and ecologically closely allied Pancratium species (P. arabicum and P. maritimum), and also confirm the morphological and ecological divergence of P. tortuosum from the other studied species. These results are supported by the constructed UPGMA dendrogram.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2012, 54, 1
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Motion prediction of catamaran with a semisubmersible bow in wave
    Autorzy:
    Sun, H.
    Jing, F.
    Jiang, Y.
    Zou, J.
    Zhuang, J.
    Ma, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/258596.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    SSB catamaran
    model test
    overset grid
    motion region
    motion response
    Opis:
    Compared with standard vessels, a slender catamaran with a semi-submerged bow (SSB) demonstrates superior seakeeping performance. To predict the motion of an SSB catamaran, computational fluid dynamics methods are adopted in this study and results are validated through small-scale model tests. The pitch, heave, and vertical acceleration are calculated at various wavelengths and speeds. Based on the overset grid and motion region methods, this study obtains the motion responses of an SSB catamaran in regular head waves. The results of the numerical studies are validated with the experimental data and show that the overset grid method is more accurate in predicting the motion of an SSB catamaran; the errors can be controlled within 20%. The movement data in regular waves shows that at a constant speed, the motion response initially increases and then decreases with increasing wavelength. This motion response peak is due to the encountering frequency being close to the natural frequency. Under identical sea conditions, the motion response increases with the increasing Froude number. The motion prediction results, that derive from a shortterm irregular sea state, show that there is an optimal speed range that can effectively reduce the amplitude of motion.
    Źródło:
    Polish Maritime Research; 2016, 1; 37-44
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interactions between soil water and fertilizer on leaf photosynthesis and delta13C of Catalpa bungei seedlings
    Autorzy:
    Qiu, Q.
    He, Q.
    Wang, J.H.
    Su, Y.
    Ma, J.W.
    Wu, J.W.
    Li, J.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/41431.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    interaction
    soil water
    fertilizer
    leaf
    photosynthesis
    delta 13 carbon
    Catalpa bungei
    seedling
    Opis:
    Our objective was to identify combinations of irrigation and fertiliser application that promoted the photosynthetic productivity and water use efficiency (WUE) of Catalpa bungei. Using response surface methodology based on a rotatable central composite design, we conducted a pot experiment with C. bungei clone 004-1 seedlings. The experiment quantified the effects of interactions between soil water content (W), nitrogen application rate (N), and phosphorus application rate (P) on leaf net photosynthetic rates (Pn), SPAD values (SPAD-502 meter readings of leaf chlorophyll), and carbon isotope composition (δ13C). N had significantly positive effects on the all three leaf parameters, while W had significantly negative effects on leaf δ13C signatures but positive effects on leaf Pn and SPAD values. The magnitude of the N effect exceeded that of the W effect. P had no significant effects on any of the three leaf parameters. The W × N interaction had significant positive effects on Pn and SPAD, but significant negative effects on leaf δ13C. Thus, irrigation and nitrogen application had different effects on seedling growth and WUE, and the two effects were interactive. Catalpa bungei growth was promoted by appropriately increasing nitrogen application and irrigation, but WUE was improved by increasing N and decreasing irrigation. Therefore, strategies for the irrigation and fertilisation of C. bungei plantations should be designed to appropriately balance plant growth and WUE.
    Źródło:
    Dendrobiology; 2016, 76
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genome size of the diploid hybrid species Hippophae goniocarpa and its parental species, H. rhamnoides ssp. sinensis and H. neurocarpa ssp. neurocarpa (Elaeagnaceae)
    Autorzy:
    Zhou, X.
    Ma, J.
    Wang, W.
    Gong, N.
    Zhang, Y.
    Liu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/19367.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2010, 52, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integrated use of potassium and Ssoil mulching on growth and productivity of garlic (Allium sativum L.) under deficit irrigation
    Autorzy:
    Barakat, M.A.
    Osman, A.S.
    Semida, W.M.
    Mohammed, A.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/11275.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2019, 76
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Reinforcement of the TNT System by a Newly-designed GAP-based Polyurethane-Urea: a Molecular Simulation Investigation
    Autorzy:
    Qian, W.
    Shu, Y.
    Ma, Q.
    Li, H.
    Wang, S.
    Chen, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/358512.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    TNT
    GAP
    polyurethane-urea
    inter-molecular interaction
    mechanical properties
    Opis:
    A glycidyl azide (GAP)-based polyurethane-urea (PUU) modifier used in the 1,3,5-trinitrotoluene (TNT)-based composite explosive was investigated by molecular simulation. Inter-molecular interactions were investigated using quantum chemistry calculation on the dimer of TNT and GAP-PUU, and attractive forces were found between the two molecules. The cohesive energy densities and the solubility parameters were obtained through molecular dynamics simulations combined with thermodynamic calculations on the TNT and GAP-PUU amorphous cell models, and the miscibility of the modifier in molten TNT was predicted to be good. The interaction energies and the mechanical properties were then obtained by molecular simulations and mechanical calculations on the solid-phase models of the GAP-PUU with TNT along three crystalline directions, and an improvement in the mechanical properties was predicted.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 2; 411-426
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dietary fiber sources consumption and overweight among Polish male students. A cross-sectional study
    Autorzy:
    Krusinska, B.
    Wuenstel, J.W.
    Kowalkowska, J.
    Wadolowska, L.
    Slowinska, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/875846.pdf
    Data publikacji:
    2017
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    dietary fibre
    fibre source
    consumption
    overweight
    male
    adolescent
    student
    obesity
    human disease
    human nutrition
    food frequency
    Polska
    Opis:
    Background. There has been an increase in the prevalence of overweight and obesity in adolescents and young adults, especially in men than women. Many adolescents have a sedentary lifestyle and consume more processed, low-fiber foods. Objective. The aim of this study was to assess the frequency of fiber intake and its selected dietary source consumption in relation to the overweight among Polish male students. Material and Methods. This cross-sectional study involved 1,233 male students aged 13.0-24.9 years from northern, eastern and central Poland. The respondents completed a self-administered Block Screening Questionnaire for Fruit/Vegetable/ Fiber Intake and measurements of their body mass and height were performed. The overweight and obesity prevalence was assessed using international standards. Results. The most frequently consumed foods by students included: white bread and potatoes, fruit and fruit or vegetable juices. The odds of overweight (including obesity) were lower from 28% (OR=0.72; 95%CI:0.56-0.93) to 31% (OR=0.69; 95%CI:0.50-0.95) with a daily consumption of white bread compared to non-daily consumption of white bread. Consumption ≥4 times/week of prepared vegetables (cooked, preserved or marinated) was associated with 51% lower odds of overweight (OR=0.49; 95%CI:0.27-0.97) compared to consumption less than 4 times/week of these foods. The odds of overweight for the level of fiber intake was insignificant. Conclusions. This study provides surprising insights regarding high-fiber and low-fiber food consumption and overweight in Polish male students. A lower odds of overweight was associated with a higher frequency consumption of relatively low in fiber foods as white bread and cooked, preserved or marinated vegetables. Most of the students consumed fiber at an unacceptable level, so a beneficial impact of high-fiber foods on overweight prevalence was not shown.
    Wprowadzenie. Obserwuje się wzrost częstości występowania nadwagi i otyłości u młodzieży i młodych osób dorosłych, zwłaszcza u mężczyzn niż kobiet. Wielu nastolatków prowadzi siedzący tryb życia i spożywa wysoko przetworzoną, ubogą w błonnik żywność. Cel. Celem badań była ocena częstotliwości spożycia błonnika i wybranych, pokarmowych źródeł błonnika w relacji do występowania nadwagi u Polskich uczniów i studentów płci męskiej. Materiał i metody. Badania przekrojowe obejmowały 1 233 uczniów i studentów płci męskiej w wieku 13,0-24,9 lat z północnej, wschodniej i centralnej Polski. Respondenci wypełnili samozwrotny kwestionariusz Block (Screening Questionnaire for Fruit/Vegetable/Fiber Intake). Wykonano pomiary masy i wysokości ciała u każdego z badanych. Oceny występowania nadwagi i otyłości dokonano z wykorzystaniem międzynarodowych standardów. Wyniki. Do najczęściej spożywanych przez respondentów należały: biały chleb, ziemniaki, owoce, owocowe lub warzywne soki. Iloraz szans występowania nadwagi (w tym otyłości) był niższy o 28% (OR=0,72; 95%CI:0,56-0,93) do 31% (OR=0,69; 95%CI:0,50-0,95) u osób codziennie spożywających białe pieczywo w porównaniu z osobami, które nie spożywały codziennie białego pieczywa. Spożycie 4 razy w tygodniu lub częściej przetworzonych warzyw (gotowanych, konserwowanych lub marynowanych) było związane z 51% niższym ilorazem szans występowania nadwagi (OR=0,49; 95%CI:0,27-0,97) w porównaniu z rzadszym spożyciem tej żywności. Iloraz szans występowania nadwagi dla poziomu spożycia błonnika nie był istotny. Wnioski. Badanie dostarcza zaskakujących spostrzeżeń dotyczących spożycia żywności o wysokiej i niskiej zawartości błonnika i występowania nadwagi u Polskich uczniów i studentów płci męskiej. Niski iloraz szans występowania nadwagi był związany z częstszym spożyciem żywności o stosunkowo niskiej zawartości błonnika, takiej jak białe pieczywo i gotowane, konserwowane lub marynowane warzywa. Większość badanych uczniów i studentów spożywała błonnik na niewystarczającym poziomie, zatem nie odnotowano korzystnego wpływu spożycia żywności wysoko błonnikowej na występowanie nadwagi.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2017, 68, 2
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Free chlorine loss during spraying of membraneless acidic electrolyzed water and its antimicrobial effect on airborne bacteria from poultry house
    Autorzy:
    Zhao, Y.
    Xin, H.
    Zhao, D.
    Zheng, W.
    Tian, W.
    Ma, H.
    Liu, K.
    Hu, H.
    Wang, T.
    Soupir, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/49243.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2014, 21, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Improvement of Properties of Floss Silk via Scouring and Finishing Treatment
    Struktura i możliwość poprawy właściwości jedwabiu naturalnego poprzez procesy wykończenia
    Autorzy:
    Lin, H.
    Ma, P.
    Ning, W.
    Huang, J.
    Jiang, F.
    Hu, Z.
    Xiao, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/233484.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    floss silk
    finishing treatment
    structure
    silk fibre properties
    nici jedwabne
    obróbka wykańczająca
    struktura
    właściwości włókien jedwabiu
    Opis:
    In the present study, floss silk was treated by scouring and finishing, respectively. The micro structure was observed with scanning electron microscopy (SEM), the mechanical property tested by an Instron 5566 tensile tester, and the crystal structure was analysed with Fourier transform attenuated total reflection infrared spectroscopy (FTIR) and X-ray diffraction (XRD), respectively. The results show that the properties of floss silk treated with the refining method are better than with the alkali method.
    Badania dotyczyły obróbki wykańczalniczej jedwabiu naturalnego. Mikrostruktura jedwabiu była badana za pomocą skaningowej mikroroskopii elektronowej, a właściwości mechaniczne testowane były klasyczną zrywarką firmy Instron, podczas gdy strukturę krystaliczną analizowano za pomocą spektroskopii w podczerwieni (FTIR) oraz rozproszenia promieniowania rentgenowskiego. Wyniki pozwoliły wytypować najlepszą w danych warunkach metodę obróbki.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2013, 3 (99); 18-21
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Field application of Clethodim herbicide combined with Trichoderma spp. for controlling weeds,root knot nematodes and Rhizoctonia root rot disease in two faba bean cultivars
    Autorzy:
    El-Dabaa, M.A,T.
    Abd-El-Khair, H.
    E;-Nagdi, W.M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/66487.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Clethodim herbicide (Cle) and three Trichoderma strains (Tri) were applied either alone or in combination (Cle + Tri) for controlling weeds, root knot nematodes (Meloidogyne arenaria) and Rhizoctonia root rot disease (Rhizoctonia solani) as well as for evaluating their effects on total microbial count in the rhizosphere and the number of Rhizobium nodules on roots in two faba bean cultivars cultivated in naturally heavily infested fields. The evaluated characters were very similar for the two tested cultivars (Nubariya 1 and Sakha 3). Treatment with Cle alone highly reduced the fresh and dry matter of tested weeds (Amaranthus viridis, Cynodon dactylon and Cenchrus ciliaris), followed by Cle + Tri and Tri alone. Cle + Tri highly reduced nematode parameters viz. numbers of J2 in soil or roots, females, eggs, galls and egg-masses when compared with each treatment alone. Tri alone caused a great decrease in Rhizoctonia root rot infection, followed by Cle + Tri and Cle alone. Total microbial count and Rhizobium nodules were affected only with Cle treatment. Plant growth parameters (shoot length, shoot fresh and dry weight and numbers of branches and leaves) and yield parameters (fresh pod and dry weight, seed number per pod, seed weight and ash pod weight of plant) were greatly improved for Cle + Tri treatments when compared with either Tri or Cle alone.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fast and effective extraction for equivalent shunt resistances of triple-junction concentrator solar cells
    Autorzy:
    Lv, H
    Dai, J
    Sheng, F
    Liu, W
    Ma, X
    Cheng, C
    Lv, Q
    Powiązania:
    https://bibliotekanauki.pl/articles/174425.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    concentrator photovoltaic
    triple junction solar cell
    equivalent shunt resistance
    Opis:
    Fast and effective extraction of equivalent shunt resistance for each subcell of GaInP/GaInAs/Ge triple-junction concentrator solar cells is presented. The two-diode model of single junction was introduced to establish the equivalent circuit of triple-junction solar cells. The current-voltage characteristic of the triple-junction solar cells was measured under AM1.5D spectrum, C = 576 and T = 303 K. Equivalent shunt resistance of each subcell was extracted from its estimated current-voltage curve. The estimated current-voltage curve of the triple-junction solar cells shows a good agreement with the experimental data in 0.31% deviation. The degradation in the equivalent shunt resistance for Ge subcell was intentionally introduced to indicate the mechanism of current-matching operation for different subcells, with the maximum output power of the triple-junction solar cells deteriorating from 3.5 to 3.17 W. The results can offer performance analysis and optimum design of photovoltaic applications.
    Źródło:
    Optica Applicata; 2015, 45, 2; 227-235
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation of clinico-pathologic data with inflammatory cells infiltration in colorectal cancer
    Autorzy:
    Grudzińska, M.
    Jakubowska, K.
    Kańczuga-Koda, L.
    Kisielewski, W.
    Famulski, W.
    Smereczański, N.M.
    Lomperta, K.
    Płoński, M.A.
    Rogoz-Jezierska, N.
    Koda, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918914.pdf
    Data publikacji:
    2020-06-10
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Colorectal cancer
    inflammatory cells
    fibrosis
    Opis:
    Introduction: Colorectal cancer (CRC) is the third most common cancer worldwide. At every phase of cancer development, the inflammatory process has an important impact. Accurate assessment inflammatory cells in the tumour environment in conjunction with clinico-pathologic features can be a relevant prognostic or predictive parameter. Purpose: To analyse inflammatory cell infiltration in CRC tumour mass and correlate with chosen clinico-pathologic parameters. Materials and methods: The study group consisted of 160 patients (64 women, 96 men) diagnosed with colorectal cancer who underwent surgery. Tissue material obtained from routine histopathological diagnosis was stained with H&E and used to assess the type of inflammatory cells in the invasive front and centre of the tumour. Results were subjected to statistical analysis with the age and gender of patients, tumour localization, tumour growth and size, TNM stage, adenocarcinoma type, fibrosis, necrosis, metastasis and tumour invasion (by the Spearman’s correlation coefficient test). Results: The presence of neutrophils in the invasive front of tumour mass was associated with fibrosis and inflammatory cell infiltration in the invasive front of tumour. Macrophages in the invasive front of tumour were found to correlate with tumour growth (expanding and infiltrate). Macrophages and eosinophils were associated with inflammatory cell infiltration in the invasive front and in the centre of tumour. Conclusions: The type of inflammatory cells in the invasive front or centre of the tumour may be useful to prognoses clinical features of colorectal cancer
    Źródło:
    Progress in Health Sciences; 2020, 10(1); 69-76
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of hadronic rescattering on the elliptic flow after the hydrodynamics model
    Autorzy:
    Ma, G.
    Ma, Y.
    Sa, B.
    Cai, X.
    He, Z.
    Huang, H.
    Long, J.
    Shen, W.
    Zhong, Ch.
    Chen, J.
    Zuo, J.
    Zhang, S.
    Shi, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/148372.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    elliptic flow
    hydrodynamic model
    hadronic rescattering
    LUCIAE model
    Opis:
    Abstract A hydrodynamics + hadronic rescattering model is used to simulate Au+Au collisions at 200 GeV and a Cooper-Frye method is adopted for hadronization. The effect of hadronic rescattering on elliptic flow V2 in 20 40% Au+Au collisions at 200 GeV has been investigated. It is found that the hadronic rescattering can suppress elliptic flow V2 and makes an asymmetric system in momentum space tend to be less anisotropic. The suppression effect becomes weak with increasing transverse momentum. In addition, the effect of hadronic rescattering on transverse momentum spectra and anisotropy of hadronic coordinate space is presented.
    Źródło:
    Nukleonika; 2006, 51,suppl.3; 21-27
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gravitational and Experimental Electromagnetic Contributions to Cerebral Effects Upon Deviations from Random Number Variations Generated by Electron Tunneling
    Autorzy:
    Caswell, J.M.
    Collins, M.W.G.
    Vares, D.A.E.
    Juden-Kelly, L.M.
    Persinger, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412515.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    gravitational energy
    random numbers
    electron tunneling
    applied weak magnetic fields
    cerebral function
    perigee-apogee effects
    Opis:
    New theoretical and traditional quantitative solutions involving a pervasive unit quantum of ~10-20 J within biological and large-scale physical systems predicted that the mass of the human subject, subtle changes in gravitational phenomena, and the energy available within the cerebral volume should affect proximal random number variations produced by electron tunneling. In a series of experiments application of a specific, physiologically-patterned weak magnetic field over the right temporal lobe significantly enhanced the effects of intention upon deviations from random variations created by electron tunneling devices at a distance of 1 m. These variations were strongly (r ~0.80) correlated with the coupling between the forces from the background free oscillations of the earth and the energy differences across the cell width between lunar perigee and apogee. The results support the approach that complex cognitive processes including “intention” can be described by physicochemical parameters and their magnitude of energies are within the range by which interactions or modulations from subtle gravitational forces applied across the cellular membrane and width might occur.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 11; 72-85
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nutritional habits of perinatal women for consumption of butter and margarine
    Zwyczaje zywieniowe kobiet w okresie okoloporodowym w zakresie spozycia masla i margaryny
    Autorzy:
    Wadolowska, L.
    Przybylowicz, K.
    Trzaskowska, M.A.
    Cichon, R.
    Kozikowski, W.
    Klobukowski, J.
    Stefanowicz, M.
    Romaszko, E.
    Malarkiewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1373146.pdf
    Data publikacji:
    1997
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    maslo
    okres okoloporodowy
    tluszcze jadalne
    nawyki zywieniowe
    spozycie zywnosci
    kobiety
    margaryna
    zywienie czlowieka
    Opis:
    The nutritional habits of perinatal women for consumption of butter and margarine were determined. The study was performed on 231 women by collecting the information about both the consumption of fats used as bread spreads or dish and culinary additives, and the amount of margarine consumed regularly for spreading on bread. The correlation between the nutritional habits and selected socio-economical factors such as place of residence, education, occupation and declared economical status, was analysed. Margarines were found to be used commonly for spreading on bread and were more often used for preparing cakes and cake fillings than butter. These two fats were thus recognized as the most important sources of trans fatty acid isomers taken by the studied women. No correlation was found between the intake of margarine as bread spread and examined socio-economical factors. High consumption of margarines by perinatal women should be considered alarming because of the possibility for the incidence of trans fatty acid isomers in breast milk in the amounts that are danger for the health of their children.
    Określono zwyczaje żywieniowe kobiet w okresie okołoporodowym w zakresie spożycia masła i margaryny. Badaniami objęto 231 kobiet zbierając informacje o spożyciu tłuszczów stosowanych do smarowania pieczywa, dodawanych do potraw i stosowanych w procesach kulinarnych oraz określając ilość zwyczajowo spożywanych margaryn stosowanych do smarowania pieczywa. Analizie poddano współzależność rozpatrywanych cech odżywiania z wybranymi czynnikami socjoekonomicznymi, tj. miejscem zamieszkania, wykształceniem, rodzajem wykonywanej pracy i deklarowaną sytuacją materialną. Stwierdzone powszechne stosowanie margaryn do smarowania pieczywa oraz w porównaniu z masłem ich szersze wykorzystanie do wypieku ciast i przygotowywania kremów pozwoliło uznać te dwa źródła za najistotniejsze w spożyciu trans izomerów kwasów tłuszczowych przez badane kobiety (rys. 1,4,5,6). Nie stwierdzono współzależności pomiędzy spożyciem margaryn do smarowania pieczywa a rozpatrywanymi czynnikami socjoekonomicznymi (tab.1). Wykazano wysokie spożycie margaryn przez badane kobiety w okresie okołoporodowym uznając je za niepokojące z uwagi na możliwość pojawienia się trans izomerów kwasów tłuszczowych w mleku kobiecym w ilościach stwarzających zagrożenie dla zdrowia ich dzieci.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 1997, 06, 1; 127-136
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Research on Characterization of Crushability for Foundry Sand Particles
    Autorzy:
    Dai, Y.
    Ma, Q. Y.
    Li, X. H.
    Zhang, X.
    Hu, F. P.
    Zhang, Y.
    Xie, W. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/379689.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry sand particle
    mechanical load
    AFS grain fineness
    crushability
    piasek odlewniczy
    obciążenie mechaniczne
    rozdrobnienie ziarna
    Opis:
    In this paper, crushability of foundry sand particles was studied. Three kinds of in-service silica sands in foundry enterprises selected as the study object, and foundry sand particles were subjected to mechanical load and thermal load during service were analyzed. A set of methods for simulating mechanical load and thermal load by milling and thermal-cold cycling were designed and researched, which were used to characterize the crushability for silica sand particles, the microstructure was observed by SEM. According to the user’s experience in actual application, the crushability of Sand C was the best and then Sand B, the last Sand A. The results indicated that mechanical load, thermal load and thermal-mechanical load can all be used to characterize the crushability of foundry sand particles. Microscopic appearances can qualitatively characterize the crushability of foundry sand particles to a certain extent, combining with the additions and cracks which are observed on the surface.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 231-235
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Allometric scaling of marbofloxacin pharmacokinetics: a retrospective analysis
    Autorzy:
    Yohannes, S.
    Hossain, M.A.
    Kim, J.Y.
    Lee, S.J.
    Kwak, D.M.
    Suh, J.W.
    Park, S.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/31939.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The association between physiologically dependent pharmacokinetic parameters (CLB, T1/2β, Vdss) of marbofloxacin and body weight was studied in eight animal species based on allometric equation Y = aWb, where ‘Y’ is the pharmacokinetic parameter, ‘W’ is body weight, ‘a’ is allometric coefficient (intercept) and ‘b’ is the exponent that describes relation between pharmacokinetic parameter and body weight. The body clearance of marbofloxacin has shown significant (P<0.0001) relation with size (Bwt) in various animal species. However, half-life and volume of distribution were not in association with body weight. Although half-life and volume of distribution were not in a good correlation with body weight, statistically significant association between the body clearance and body weight suggests validity of allometric scaling for predicting pharmacokinetic parameters of marbofloxacin in animal species that have not been studied yet. However further study considering large sample size and other parameters influencing pharmacokinetics of marbofloxacin is recommended.
    Źródło:
    Polish Journal of Veterinary Sciences; 2014, 17, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seasonal variations in the abundance and sinking flux of biogenic silica in Daya Bay, Northern South China Sea
    Autorzy:
    Zhao, X.
    Yang, W.
    Ma, H.
    Li, J.
    Chen, M.
    Fang, Z.
    Zhang, X.
    Zeng, J.
    Qiu, Y.
    Zheng, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48777.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    biogenic silica
    flux
    thorium
    seasonal variation
    shallow water
    Daya Bay
    China Sea
    Źródło:
    Oceanologia; 2019, 61, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantum Chemical Study of Aminonitrocyclopentanes as Possible High Energy Density Materials (HEDMs)
    Autorzy:
    Bai, J.
    Chi, W. J.
    Li, L. L.
    Yan, T.
    Wen, X. E.
    Li, B. T.
    Wu, H. S.
    Ma, F. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358101.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    cyclopentane derivatives
    high energy density materials
    impact sensitivity
    quantum chemistry
    DFT
    available free space
    Opis:
    Nitro and amine groups were introduced into the cyclopentane skeleton, and the heats of formation, detonation performance, bond dissociation energies, and impact sensitivity for these aminonitrocyclopentanes were calculated in detail at the B3LYP/6-311G** level. The results show that all of the derivatives have negative heats of formation, which are influenced by the position of the substituent groups. Their stabilities were estimated and analyzed according to their bond dissociation energies and calculated characteristic H50 values. Most of the compounds were found to have a lower impact sensitivity than HMX. Furthermore, the detonation velocities and detonation pressures were predicted via the Kamlet-Jacobs equation. Of all these aminonitrocyclopentanes, E has the best detonation properties (ρ = 2.05 g/cm3, D = 9.11 m/s, P = 39.62 GPa) and can be considered as a candidate high energy density material.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 4; 467-480
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Osteology of the Late Cretaceous alvarezsauroid Linhenykus monodactylus from China and comments on alvarezsauroid biogeography
    Autorzy:
    Xu, X.
    Upchurch, P.
    Ma, Q.
    Pittman, M.
    Choiniere, J.
    Sullivan, C.
    Hone, D.W.E.
    Tan, Q.
    Tan, L.
    Xiao, D.
    Han, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/20629.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    osteology
    Cretaceous
    Late Cretaceous
    alvarezsauroid
    Linhenykus monodactylus
    China
    biogeography
    Dinosauria
    Theropoda
    Parvicursorinae
    Treefitte
    dispersal
    vicariance
    sympatry
    Wulansuhai Formation
    Inner Mongolia
    Opis:
    The alvarezsauroid theropod Linhenykus monodactylus from the Upper Cretaceous of Inner Mongolia, China is the first knownmonodactyl non−avian dinosaur, providing important information on the complex patterns of manual evolution seen in alvarezsauroids. Herewe provide a detailed description of the osteology of this taxon. Linhenykus shows a number of fea− tures that are transitional between parvicursorine and non−parvicursorine alvarezsauroids, but detailed comparisons also re− veal that some characters had a more complex distribution. We also use event−based tree−fitting to perform a quantitative analysis of alvarezsauroid biogeography incorporating several recently discovered taxa. The results suggest that there is no statistical support for previous biogeographic hypotheses that favour pure vicariance or pure dispersal scenarios as explana− tions for the distributions of alvarezsauroids across SouthAmerica, NorthAmerica andAsia. Instead, statistically significant biogeographic reconstructions suggest a dominant role for sympatric (or “within area”) events, combined with a mix of vicariance, dispersal and regional extinction. At present the alvarezsauroid data set is too small to completely resolve the biogeographic history of this group: future studies will need to create larger data sets that encompass additional clades.
    Źródło:
    Acta Palaeontologica Polonica; 2013, 58, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of smart sorting machine using artificial intelligence for chili fertigation industries
    Autorzy:
    Abdul Aziz, M. F.
    Bukhari, W. M.
    Sukhaimie, M. N.
    Izzuddin, T.A.
    Norasikin, M.A.
    Rasid, A. F. A.
    Bazilah, N. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2141810.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    precision agriculture
    artificial neural network
    smart fertigation
    Opis:
    This paper presents an automation process is a need in the agricultural industry specifically chili crops, that implemented image processing techniques and classification of chili crops usually based on their color, shape, and texture. The goal of this study was to develop a portable sorting machine that will be able to segregate chili based on their color by using Artificial Neural Network (ANN) and to analyze the performance by using the Plot Confusion method. A sample of ten green chili images and ten red chili images was trained by using Learning Algorithm in MATLAB program that included a feature extraction process and tested by comparing the performance with a larger dataset, which are 40 samples of chili images. The trained network from 20 samples produced an overall accuracy of 80 percent and above, while the trained network from 40 samples produced an overall accuracy of 85 percent. These results indicate the importance of further study as the design of the smart sorting machine was general enough to be used in the agricultural industry that requires a high volume of chili crops and with other differentiating features to be processed at the same time. Improvements can be made to the sorting system but will come at a higher price.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2021, 15, 4; 44-52
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    17 beta-estradiol affects proliferation and apoptosis of canine bone marrow mesenchymal stem cells in vitro
    Autorzy:
    Zhou, Z.-H.
    Gu, C.-W.
    Li, J.
    Huang, X.-Y.
    Deng, J.-Q.
    Shen, L.-H.
    Cao, S.-Z.
    Deng, J.-L.
    Zuo, Z.-C.
    Wang, Y.
    Ma, X.-P.
    Ren, Z.-H.
    Yu, S.-M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087308.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    apoptosis
    bone marrow mesenchymal stem cells (BMSCs)
    canine
    proliferation
    17 beta-estradiol (E2)
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 2; 235-245
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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