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    Wyświetlanie 1-32 z 32
    Tytuł:
    Tree domatic number in graphs
    Autorzy:
    Chen, X. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/255594.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    tree domatic number
    regular graph
    planar graph
    Cartesian product
    Opis:
    A dominating set S in a graph G is a tree dominating set of G if the subgraph induced by S is a tree. The tree domatic number of G is the maximum number of pairwise disjoint tree dominating sets in V(G). First, some exact values of and sharp bounds for the tree domatic number are given. Then, we establish a sharp lower bound for the number of edges in a connected graph of given order and given tree domatic number, and we characterize the extremal graphs. Finally, we show that a tree domatic number of a planar graph is at most 4 and give a characterization of planar graphs with the tree domatic number 3.
    Źródło:
    Opuscula Mathematica; 2007, 27, 1; 5-11
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of various factors on the viv-induced fatigue damage in the cable of submerged floating tunnel
    Autorzy:
    Luo, G.
    Chen, J.
    Zhou, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/259555.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    submerged floating tunnel cable
    vortex induced vibration
    fatigue damage
    factor analysis
    Opis:
    According to the modal superposition method, the vortex vibration procedure of submerged floating tunnel cable was compiled using Matlab, based on the calculated results, the fatigue damage was predicted. The effects of various factors, such as cable density, cable length, and pretension and velocity distribution on vortex induced fatigue damage in the cable were studied. The results show that velocity distribution has more effect on the cable fatigue damage than cable length, cable density and pretension. Secondly, cable length has also relatively effect on the cable damage fatigue, cable density and pretension has limited in a certain range.
    Źródło:
    Polish Maritime Research; 2015, 4; 76-83
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Machine Learning Method of PIDVCA
    Autorzy:
    Li, L.
    Wang, X.
    Chen, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1841618.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    learning methods
    personified intelligence
    collision avoidance
    dynamic collision avoidance
    static collision avoidance
    Opis:
    Building a dynamic collision knowledge base of self-learning is one of the core contents of implementing "personified intelligence" in Personifying Intelligent Decision-making for Vessel Collision Avoidance (short for PIDVCA). In the paper, the machine learning method of PIDVCA combined with offline artificial learning and online machine learning is proposed. The static collision avoidance knowledge is acquired through offline artificial learning, and the isomeric knowledge representation integration method with process knowledge as the carrier is established, and the Dynamic collision avoidance knowledge is acquired through online machine learning guided by inference engine. A large number of simulation results show that the dynamic collision avoidance knowledge base constructed by machine learning can achieve the effect of anthropomorphic intelligent collision avoidance. It is verified by examples that the machine learning method of PIDVCA can realize target perception, target cognition and finally obtain an effective collision avoidance decision-making.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 3; 533-540
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties and pre-processing strategies to enhance the discovery of functional dependency with degree of satisfaction
    Autorzy:
    Wei, Q.
    Chen, G.
    Zhou, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/970954.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    functional dependency
    incomplete data
    degree of distinctness
    data mining
    Opis:
    Functional dependency with degree of satisfaction (FDd) is an extended notion in data modeling, and reflects a type of integrity constraints and business rules on attributes, mainly for massive databases, in which incomplete data such as noise, null and imprecision may exist. While existing approaches are considered effective in general, attempts for further improvement in efficiency are deemed meaningful and desirable as far as knowledge discovery is concerned. This paper focuses on discovering (FDd)s as a form of useful semantic knowledge, aiming at providing an enhancement to the FDd mining process in a more efficient manner. In doing so, properties of FDd are in-depth investigated along with a measure for degree of distinctness. Subsequently, a number of optimization strategies are developed for pre-processing, which are then incorporated into the mining process, giving rise to an enhanced approach for mining functional dependency with degree of satisfaction, namely e-MFDD. Finally, data experiments revealed that e-MFDD significantly outperformed the original approach without pre-processing.
    Źródło:
    Control and Cybernetics; 2009, 38, 2; 367-394
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polymer Reinforced DNAN/RDX Energetic Composites: Interfacial Interactions and Mechanical Properties
    Autorzy:
    Qian, W.
    Chen, X.
    Luo, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/358170.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    energetic composites
    dinitroanisole
    molecular dynamics
    interfacial interactions
    mechanical properties
    Opis:
    2,4-Dinitroanisole (DNAN) has excellent properties as a replacement for 1,3,5-trinitrotoluene (TNT) in melt-cast explosives, and the polymeric modifier used is critical to the mechanical modification of the DNAN/RDX energetic composite. In our research, the typical polymeric modifier acrolein-pentaerythritol resin (APER) was successfully added experimentally to the DNAN/RDX system, and the effects of interfacial interactions on the mechanical properties of these polymers in reinforcing the DNAN/RDX energetic composites were investigated by molecular dynamics simulations, scanning electron microscopy (SEM) and mechanical testing. The results showed that strong attractive interactions exist between the polymer and the explosives, wherein van der Waals forces were found to play the main role. The morphological micro-images also showed tight binding between the polymer/explosive interfaces, which supported the calculated strong interfacial interactions. The mechanical tests confirmed that adding the polymers can obviously reinforce the mechanical strength and toughness of DNAN/RDX systems. The above observations revealed that the cooperative effects of the APER polymer can help to reinforce the interfacial interactions and mechanical properties of DNAN/RDX composites, which is of importance in the formulation and mechanical evaluation of advanced energetic composites.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 3; 726-741
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temporal patterns of pollen shedding for longleaf pine (Pinus palustris) at the Escambia Experimental Forest in Alabama, USA
    Autorzy:
    Chen, X.
    Brockway, D.G.
    Guo, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078205.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    accumulated air temperature
    accumulated pollen density
    peak pollen shedding
    pollen phenology
    power-law
    Opis:
    Longleaf pine is an important tree species in the southeastern United States and studying the temporal patterns of pollen shedding is crucial to a better understanding of its phenology and seed production. In this study, field observation data on the timing of pollen shedding from 1958 to 2013 were analyzed with reference to local weather conditions. Our results indicated that the time of peak pollen shedding after January 1 (TPPS) ranged from 53 days (about February 22) to 95 days (around April 5). There was no significant trend of decreasing TPPS. The number of days with the maximum air temperature above 0 °C was close to the TPPS. The accumulated maximum daily air temperature for the TPPS approximated an average of 1,342 °C. The TPPS declined with an increase in the average air temperature during winters. The time of 80% accumulated pollen density (TAPD) varied from 5 to 32 days, with an average of 13 days. Taylor’s power-law was evident in the TAPD data, with the time group of 10–15 days having an interval time of 2 years. Winter weather was not correlated with the TAPD. These results provide new information concerning the pollen phenology for longleaf pine trees
    Źródło:
    Dendrobiology; 2020, 84; 30-38
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of high ship speed ratio on collision avoidance behavior of COLREGS
    Autorzy:
    Wang, X. H.
    Li, L.
    Chen, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/116490.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    colregs
    Personifying Intelligent Decision-making for Vessel Collision Avoidance (PIDVCA)
    Vessel Collision Avoidance
    collision avoidance
    decision making
    relative motion
    geometricdiagram of relative motion
    anti-collision
    Opis:
    The speed ratio is an important factor that must be considered when two vessels will course change to avoid collision. In the process of the research on Personifying Intelligent Decision-making for Vessel Collision Avoidance (short for PIDVCA), it is found that the effect of collision avoidance based on the existing “International Regulations for Prevention Collision at sea” (short for COLREGS) is greatly affected by the high speed ratio (k=Vt/V0≥1.5). Through the analysis on the geometric change law of two vessels’ relative motion in Open waters, the effects of the responsibility for the ship collision avoidance under the COLREGS and special case for high-speed ratio is discussed. According to the collision avoidance measures taken for two vessels encounter situation, some reasonable suggestions are put forward and the simulation experiments that based on ship's intelligent collision avoidance simulation platform are given to support the idea.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 2; 319-323
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leaching kinetic study of Y and Eu from waste phosphors using hydrochloric acid solution containing hydrogen peroxide
    Autorzy:
    Yu, M.
    Jiang, Z.
    Mei, G.
    Chen, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/949690.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    waste phosphors
    leaching
    kinetics
    rare earth elements
    Opis:
    The leaching kinetics of Y and Eu from waste phosphors using a hydrochloric acid (HCl) solution containing hydrogen peroxide (H2O2) were investigated. Characterization of the waste phosphors was performed using XRD to ascertain the phases as (Y0.95Eu0.05)2O3 (red phosphors), (Ce0.67Tb0.33)MgAl11O19 (green phosphors), (Ba0.9Eu0.1)Mg2Al16O27 (blue phosphors), and SiO2 (quartz). The influence of factors such as HCl concentration, addition amount of H2O2, temperature, and reaction time on the leaching performance of Y and Eu was investigated. The maximum leaching recoveries of Y (99.87%) and Eu (88.72%) were obtained at 4 M HCl, 0.2 cm3/g H2O2, 60 ℃ temperature, and 180 min of reaction time at a liquid-to-solid ratio of 7.5 cm3/g. Leaching kinetic results showed the best fit with the shrinking sphere model (1-(1-x)1/3)=kct), ensuring that the overall leaching process was governed by a chemical control mechanism. Activation energies of 42.35 and 33.28 kJ/mol were acquired for leaching of Y and Eu, respectively, at 40-70 ℃, which further supports the proposed chemical control leaching process.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 2; 238-248
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wczesne wykrywanie uszkodzeń przekładni zębatej z wykorzystaniem słabych sygnałów drgań
    Early fault detection of gearbox using weak vibration signals
    Autorzy:
    Qingjun, W.
    Chen, X.
    Yang, H.
    Wang, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/300940.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    wczesne wykrywanie uszkodzeń
    adaptacyjna reprezentacja czasowo-częstotliwościowa
    zdemodulowany sygnał drań
    early fault detection
    adaptive joint time-frequency
    weak demodulated vibration signal
    Opis:
    Zaproponowano nową metodę wczesnego wykrywania pęknięć zębów przekładni zębatej polegającą na analizie słabego sygnału drganiowego zmodulowanego niskimi częstotliwościami. Uzyskaną obwiednię zmodulowanego sygnału drgań wykorzystano do wyznaczenia częstotliwości modulujących. Zdemodulowane częstotliwości charakterystyczne otrzymano za pomocą adaptacyjnej, czasowo-częstotliwościowej reprezentacji sygnału z obwiedni sygnału drganiowego wyznaczonej z wykorzystaniem transformaty Hilberta. Spektrogram adaptacyjny odzwierciedla częstotliwość zazębienia i jej harmoniczne, częstotliwość sprzęgła, częstotliwość nośną oraz wstęgi boczne w sygnale drganiowym poddanym analizie z użyciem zoptymalizowanego przekształcenia falkowego. Proponowaną metodę weryfkowano przy użyciu sygnału symulowanego i rzeczywistego. Wyniki wskazują na możliwość efektywnego zastosowania proponowanej metody do detekcji pęknięć zębów przekładni zębatej.
    A new method for the early detection of the gear crack was proposed by the analysis of the weak low-frequency modulated vibration signal. The envelope of the modulated vibration signal was extracted and used to demonstrate the modulating frequencies. The demodulated characteristic frequencies were obtained with the adaptive joint time-frequency signal representation from the Hilbert transform envelope of the vibration signal. The adaptive spectrogram matches the meshing frequency and its harmonics, the coupling frequency, the carrier frequency and the sidebands in the vibration signal by the optimized wavelet. Simulated and experimental vibration signals are used to test the proposed method. The results show the applicability and effectiveness of the proposed method for gear crack detection.
    Źródło:
    Eksploatacja i Niezawodność; 2011, 1; 11-15
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of flow softening mechanisms of a nickel-based superalloy with o phase
    Autorzy:
    Lin, Y. C.
    He, D.-G
    Chen, M. S.
    Chen, X.-M.
    Zhao, C.-Y.
    Ma, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/958203.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    alloys
    hot deformation
    flow softening behavior
    microstructural evolution
    Opis:
    The flow softening behaviors of a nickel-based superalloy with o phase are investigated by hot compression tests over wide ranges of deformation temperature and strain rate. Electron backscattered diffraction (EBSD). optical microscopy (OM), and scanning electron microscopy (SEM) are employed to study the flow softening mechanisms of the studied superalloy. It is found that the flow softening behaviors of the studied superalloy are sensitive to deformation temperature and strain rate. At high strain rate and low deformation temperature, the obvious flow softening behaviors occur. With the increase of deformation temperature or decrease of strain rate, the flow softening degree becomes weaken. At high strain rate (1s-1), the flow softening is mostly induced by the plastic deformation heating and flow localization. However, at low strain rate domains (0.001-0.01s-1), the effects of deformation heating on flow softening are slight. Moreover, the flow softening at low strain rates is mainly induced by the discontinuous dynamic recrystallization and the dissolution of 6 phase (Ni3Nb).
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1537-1546
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental study on thermo physical parameter of loose coal bulk
    Badania eksperymentalne parametrów termofizycznych luźnych brył węgla
    Autorzy:
    Chen, Q. H.
    Dai, G. L.
    Zhang, G. S.
    Fan, X. Q.
    Qin, R. X.
    Powiązania:
    https://bibliotekanauki.pl/articles/348819.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    parametry termofizyczne
    luźny węgiel
    badania eksperymentalne
    współczynniki wpływu
    thermo-physical parameters
    loose coal
    experimental study
    influence factors
    Opis:
    Experimental study was carried out on the thermo physical parameter of loose coal bulk, based on hot-wired method, the relationship between thermo physical parameter of loose coal bulk and each influence factors obtained, and the result shows that the thermal conductivity increased and thermal capacity decreased on condition that the coal rank increased, with the increasing of water content, thermal conductivity and thermal capacity are both have the trend of ascent. Within the experimental temperature limit (< 110 degrees of Celsius), thermal conductivity shows linear growth trend with the increasing of temperature. When voidage increased, thermal conductivity decreased, but the relevance between thermal capacity and voidage is unnoticeable.
    Wyniki badań eksperymentalnych przeprowadzonych w celu określenia parametrów termofizycznych luźnych brył węgla metodą "gorącej nici" (ang. hot-wire method) i zależności pomiędzy parametrem termofizycznym luźnych brył węgla a każdym z uzyskanych współczynników wpływu pokazują wzrost przewodności cieplnej i obniżenie pojemności cieplnej wraz z poprawą jakości węgla. Przy zwiększaniu zawartości wody przewodność cieplna i pojemność cieplna wykazują tendencje wzrostowe. W badanym zakresie temperatur (< 110 stopni Celsjusza) przewodność cieplna wzrasta liniowo wraz ze wzrostem temperatury. Zwiększenie przestrzeni pomiędzy elementami skutkowało obniżeniem przewodności cieplnej, jednak nie zaobserwowano związku pomiędzy pojemnością cieplną a większą przestrzenią między elementami.
    Źródło:
    AGH Journal of Mining and Geoengineering; 2012, 36, 3; 89-98
    1732-6702
    Pojawia się w:
    AGH Journal of Mining and Geoengineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid stabilization of discrete-time LTI systems with two quantized signals
    Autorzy:
    Zhai, G.
    Matsumoto, Y.
    Chen, X.
    Imae, J.
    Kobayashi, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/908451.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    system czasu dyskretnego
    strategia stabilizacji
    kwantyzator
    sprzężenie zwrotne
    discrete-time LTI system
    hybrid stabilization strategy
    quantizer
    state feedback
    output feedback
    Opis:
    We consider stabilizing a discrete-time LTI (linear time-invariant) system via state feedback where both the quantized state and control input signals are involved. The system under consideration is stabilizable and stabilizing state feedback has been designed without considering quantization, but the system’s stability is not guaranteed due to the quantization effect. For this reason, we propose a hybrid quantized state feedback strategy asymptotically stabilizing the system, where the values of the quantizer parameters are updated at discrete time instants. We also extend the result to the case of static output feedback.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2005, 15, 4; 509-516
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elastic and Thermodynamic Properties of Anti-Perovskite Type Superconductor $MCNi_3$ (M = Zn, Cd)
    Autorzy:
    Duan, M.
    Tan, J.
    Ji, G.
    Chen, X.
    Zhu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535766.pdf
    Data publikacji:
    2010-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    62.20.D-
    91.60.Gf
    Opis:
    The elastic and thermodynamic properties of the anti-perovskite superconductor $ZnCNi_3$ and $CdCNi_3$ are investigated by first-principles calculations. With the local density approximation as well as the generalized gradient approximation for exchange and correlation, the ground state properties and equation of state are obtained, which agree well with other theoretical calculations and experiments. Furthermore, by the elastic stability criteria, we predict that $ZnCNi_3$ and $CdCNi_3$ are not stable above 98.1 GPa and 196.5 GPa, respectively. The dependences of the heat capacity, thermal expansion coefficient, the Grüneisen parameter and bulk modulus ($B_{T}$ and $B_{S}$) on pressure and temperature for $ZnCNi_3$ and $CdCNi_3$ are also obtained successfully.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 4; 652-658
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability of air nucleus in liquid water and cavitation inception on marine engineering
    Autorzy:
    Fu, Q.
    Chen, M.
    Wang, X.
    Zhu, R.
    Zhang, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/260137.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    air nuclei
    water
    molecular dynamics
    stability
    surface tension
    Opis:
    The micro air nucleus widely distributed in the ocean is a necessary condition for the cavitation of hydraulic machinery in seawater. In order to study the stability of air nucleus in seawater and cavitation inception, the computational domain of water molecules with air nucleus was studied using the method of molecular dynamics simulation, and the transient characteristics of air nucleus in liquid water were obtained. The key factors influencing nuclei stability were analyzed. The results showed that air nucleus with a certain mass could maintain the dynamic equilibrium in liquid water. The internal density of air nuclei had a critical value that allowed the nuclei to stably exist in water. The air nuclei mass was the decisive factor in its equilibrium volume in water, and the two were positively correlated. The internal density of air nuclei was negatively correlated with the nuclei radius when the nuclei was stable in water. Liquid surface tension was an important factor affecting the stability of the air nuclei. The larger the initial radius of nuclei, the smaller the water pressure, and the more likely the cavitation occurs.
    Źródło:
    Polish Maritime Research; 2018, S 3; 111-119
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic and Electronic Properties of $OsB_2$ from First-Principles Calculations
    Autorzy:
    Cheng, Y.
    Yang, J.
    Wang, Y.
    Ji, G.
    Chen, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365243.pdf
    Data publikacji:
    2014-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    61.50.Ks
    67.25.de
    71.20.-b
    Opis:
    The pressure induced phase transitions of $OsB_2$ from the orthorhombic structure (Orth) to the hexagonal structure (Hex) is investigated by using ab initio plane-wave pseudopotential density functional theory, together with quasi-harmonic Debye model. We find that the pressure-induced phase transition occurs at 2.8 GPa and 12.5 GPa by local density approximation and general gradient approximation, respectively. It is predicted that $OsB_2$ has no phase transition temperature from the Orth structure to the Hex structure. Moreover, the dependences of the relative volume V/$V_0$ on the pressure, thermal expansion coefficient α on the pressure and temperature are also successfully obtained. The electronic properties including energy band, total and partial density of states and electron density difference for two structures are also analyzed. The Mulliken charges and Bond populations for both Orth and Hex structures are also obtained.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 5; 1186-1190
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of fenugreek-gum and particle size on performance of talc flotation
    Autorzy:
    Gu, G.
    Mo, C.
    Zhao, K.
    Chen, Z.
    Wang, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/109940.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    talc
    particle size
    fenugreek-gum
    depression
    flocculation
    Opis:
    Talc usually exists as a gangue mineral in copper-nickel sulfide, molybdenite etc. In order to separate precious metals, naturally hydrophobic talc should be depressed effectively in flotation process. The effect of fenugreek-gum (FG) on the flotation performance of talc with different particle sizes was studied. The depression mechanism was investigated extensively through tests of flotation, adsorption and zeta potential, as well as infrared spectroscopy and laser particle size analysis. Flotation results indicated that the FG had a strong depression ability for talc with the particle size of -0.074 + 0.037 mm, -0.037 mm and -0.010 mm when proper dosage of FG was added. The coarse talc was completely depressed by 2.5 mg/ dm3 FG. When the particle size decreased, more FG was required to obtain the maximum depressing effect, which was verified by adsorption tests. FG reduced the electronegativity on the talc surface by chemical adsorption, and flocculation of talc powders caused a high efficient depressing effect.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 3; 1026-1033
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of nitrogen injection displacement for fire extinguishment
    Zwalczanie pożarów endogenicznych za pomocą azotu
    Autorzy:
    Tang, Q.
    Qin, R. X.
    Chen, Q. H.
    Zhang, G. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/348639.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    technologia ochrony przeciwpożarowej w szczelnych zrobach
    technologia ochrony przeciw pożarowej metodą wtrysku gazów szlachetnych
    technologia zwalczania pożarów za pomocą azotu
    technologia separacji
    nowe rozwiązania w technologii ochrony pożarowej
    fire-prevented technology in sealed gob
    fire-prevented technology by infusing inert gases
    infusing-permuting nitrogen technology
    separation technology
    new development in fire-prevented technology
    Opis:
    The article introduced the basic theory of nitrogen injection displacement for fire extinguish, which is presented by Professor Guoshu Zhang, applied this technology in coal mine, and then verified the results through numerical simulation, the production got from the technology's application. Presented some new views in specific implementation of nitrogen injection displacement for fire extinguish.
    W niniejszym artykule opisano zastosowanie podstawowej teorii wypełniania zrobów azotem podczas gaszenia pożarów endogenicznych zaprezentowanej przez profesora Guoshu Zhang, jej zastosowanie w kopalni oraz weryfikację wyników za pomocą symulacji numerycznej i uzyskane efekty w związku z zastosowaniem tej technologii. Zaprezentowano szczegółowe zasady oraz poglądy na temat wypełniania zrobów azotem do zwalczania pożarów.
    Źródło:
    AGH Journal of Mining and Geoengineering; 2012, 36, 3; 345-351
    1732-6702
    Pojawia się w:
    AGH Journal of Mining and Geoengineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of mechanical flotation cell and cyclonic microbubble flotation column in terms of separation performance for fine graphite
    Autorzy:
    Bu, X.
    Zhang, T.
    Chen, Y.
    Peng, Y.
    Xie, G.
    Wu, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/110791.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    mechanical flotation
    column flotation
    Fuerstenau upgrading curve
    graphite
    Opis:
    Comparison of flotation performance between the flotation column and mechanical flotation was carried out to promote the grade and economic value of the graphite ore (15.40% ash content). The ash content of the concentrate of the mechanical flotation was 10.77% at the yield of 79.34%. In contrast, the yield of the concentrate of the column flotation was increased to 88.93% with 10.55% ash content. Comparative study of the Fuerstenau upgrading curves indicated that the column flotation was more efficient for cleaning the graphite ore in the presence of the centrifugal force field, nanobubbles (generated by hydrodynamic cavitation), and the thicker froth layer in comparison with the mechanical flotation.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 3; 732-740
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for measuring the quality parameters of image intensifier based on projecting phase-shifting gratings
    Autorzy:
    Sun, S.
    Cao, Y.
    Chen, C.
    Fu, G.
    Wang, Y.
    Xu, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/174300.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phase measurement
    phase-shifting grating
    distortion
    image intensifier
    imaging quality parameter
    Opis:
    A method for measuring the quality parameters of image intensifier based on projecting phase-shifting gratings is proposed. A set of designed phase-shifting gratings are projected into the measuring system orderly to obtain the magnification parameter of the measured image intensifier, and the phase caused by the measured image intensifier. After obtaining the referential phase caused by only the magnification of the measured image intensifier, the phase caused by the distortion of the measured image intensifier is extracted by phase calculating and phase unwrapping. Both the global distortion and the partial distortion of the measured image intensifier can be measured by phase-to-distortion matching at the same time. The experimental results show that the proposed method can measure the multiple quality parameters of image intensifier effectively.
    Źródło:
    Optica Applicata; 2018, 48, 1; 39-51
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigation on the Compression Behaviours of 3D Angle‑interlock Woven Composites with Carbons Nanotube under High Strain Rates
    Eksperymentalne badanie ściskania kompozytów 3D wzmacnianych tkaninami o skośnym splocie interlokowym modyfikowanych nanorurkami węglowymi przy dużych szybkościach odkształcania
    Autorzy:
    Ma, P
    Jiang, G
    Zhang, F
    Chen, Q
    Miao, X
    Cong, H
    Powiązania:
    https://bibliotekanauki.pl/articles/233089.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    3D angle-interlock woven composites
    carbon nanotubes (CNTs)
    impact compression behaviours
    high strain rates
    badanie ściskania kompozytów 3D
    nanorurki węglowe (CNT)
    zachowanie wpływu kompresji
    duże szybkości odkształcania
    Opis:
    The compressive properties of 3D angle-interlock woven/epoxy resin composites with various carbon nanotube (CNTs) contents were investigated under quasi-static and high strain rate loading to evaluate the compressive failure modes, which were influenced by various CNT contents and different strain rates. The results indicated that the stress strain curves were strain rate sensitive, and the compressive failure stress of composites with various CNT contents were increased with a change the strain rates and CNT contents. The compressive failure modes of 3D angle-interlock woven composites without CNT tended to be in shear deformation, delamination fibre breakage and matrix crack together, and the failure modes of 3D angle-interlock woven composites with high CNT contents presented delamination and shear deformation.
    Badano właściwości ściskające kompozytów 3D wzmacnianych tkaninami o skośnym splocie interlokowym modyfikowanych nanorurkami węglowymi. W celu wyznaczenia uszkodzeń powstałych na skutek ściskania, na które wpływa zawartość nanorurek i szybkości odkształcania, badania przeprowadzono pod obciążeniem quasi-statycznym i przy dużych szybkościach ściskania. Wyniki wykazały, że krzywe ściskania zależały od szybkości odkształcania i zawartości nanorurek. Uszkodzenia mają charakter rozwarstwienia i deformacji pod wpływem naprężeń ścinających.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2015, 2 (110); 44-50
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New data on the anatomy of fuxianhuiid arthropod Guangweicaris spinatus from the lower Cambrian Guanshan Biota, Yunnan, China
    Autorzy:
    Chen, H.
    Legg, D.A.
    Zhai, D.-Y.
    Liu, Y.
    Hou, X.-G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082130.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Arthropoda
    Euarthropoda
    Fuxianhuiida
    Fuxianhuiidae
    Guanshan Biota
    Cambrian
    Asia
    Opis:
    The fuxianhuiid arthropod Guangweicaris spinatus, from the lower Cambrian (Series 2, Stage 4), Guanshan Biota (Wulongqing Member, Canglangpu Formation), located in the vicinity of Kunming (Yunnan Province, southwest China), is redescribed based on new specimens and a re-examination of previously described material. A more complete overview of its morphology is given. Newly recognised features include: (i) a medial cephalic bulge; (ii) a tripartite hypostome; (iii) a pair of specialized post-antennal appendage (SPA); (iv) a putative telson; (v) two pairs of spines on the posteroventral margin of the terminal abdominal segment. This information is used to provide an emended diagnosis of the family Fuxianhuiidae, and the genus Guangweicaris.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 1; 139-148
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bacterial communities in PM2.5 and PM10 in broiler houses at different broiler growth stages in spring
    Autorzy:
    Zhang, J.
    Li, Y.
    Xu, E.
    Jiang, L.
    Tang, J.
    Li, M.
    Zhao, X.
    Chen, G.
    Zhu, H.
    Yu, X.
    Zhang, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087465.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bacterial communities
    broilers
    high-throughput sequencing
    particulate matter
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 3; 495-504
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of vinasse and silica mud on the performance of thermophilic fermentation of brewery sludge from brewery waste substrates
    Autorzy:
    Xin, Y.
    Shen, J.
    Wang, B.
    Zhu, X.
    Wang, Y.
    Wang, G.
    Chen, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/950042.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    brewery waste
    anaerobic digestion
    thermophilic fermentation
    odpady browarnicze
    fermentacja beztlenowa
    fermentacja termofilna
    Opis:
    The anaerobic digestion of mixing brewery sludge with vinasse and silica mud at various ratios under thermophilic conditions was explored. Vinasse, silica mud and beer sludge (the sludge from the treatment of beer wastewater) are the main solid wastes of the beer production. Uncontrolled decom-position of these wastes could cause large-scale contamination of soil, water, and air. The results of the investigation showed that the optimal ratio of beer sludge and vinasse was 1:1 under total solids of 10%, producing the highest amount of gas of 1.34 cm3/g within 24 h and 4.06 cm3/g in 10 days. The silica mud weakened the fermentation process and reduced the gas production, and the concentration of total organic carbon, total nitrogen and volatile solids decreased during the digestion. For the mixture of brewery sludge and vinasse, the content of the total organic matter in the biogas manure was more than 60% and the value of pH was 6.5 after the anaerobic digestion, indicating that the manure can be used as an organic fertilizer.
    Źródło:
    Environment Protection Engineering; 2017, 43, 2; 119-127
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impacts of BSMV on vegetative growth and water status in hulless barley (Hordeum vulgare var. nudum) in VIGS study
    Autorzy:
    Liang, J.
    Chen, X.
    Zhao, H.
    Yu, S.
    Long, H.
    Deng, G.
    Pan, Z.
    Yu, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/57548.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Hordeum vulgare var.nudum
    hulled barley
    barley
    BSMV zob.barley stripe mosaic virus
    barley stripe mosaic virus
    vegetative growth
    water status
    VIGS zob.virus induced gene silencing method
    virus induced gene silencing method
    Opis:
    Barley stripe mosaic virus (BSMV) is an established and extensively used virus-induced gene silencing (VIGS) vector for gene function analysis in monocots. However, the phenotypes generated by targeted gene silencing may be affected or masked by symptoms of BSMV infection. To better understand the potential effects of BSMV-VIGS in hulless barley (Hordeum vulgare var. nudum), the accumulation pattern of BSMV and its impacts on vegetative growth and water status were investigated. The results indicated that the vegetative growth of infected plants was significantly and continuously impacted by BSMV from 10 to 40 days post inoculation (dpi). When the accumulation of BSMV was extremely high (7 to 11 dpi), infected plants displayed twisted leaf tips with an increased water lose rate (WLR) and decreased water content (WC). Virus accumulation declined and stabilized after 25 dpi, at this stage, the WLR and WC were unaffected in the infected plants. The efficiency of VIGS was tested by the silencing of Phytoene desaturase (PDS). RT-qPCR indicated that BSMV-VIGS can be sustained with good efficiency for up to 40 dpi under an altered condition with lower temperature (22 ±1°C) and higher relative humidity (70 ±10%). It was concluded that 25 to 40 dpi was the appropriate time zone for drought-related gene analysis by BSMV-VIGS under such condition.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dft investigation of a high energy density polynitro compound, 2,2’-Bis(trinitromethyl)-5,5’-azo-1,2,3,4- tetrazole
    Autorzy:
    Lin, H.
    Zhu, S. G.
    Chen, P. Y.
    Li, K.
    Li, H. Z.
    Peng, X. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/358030.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    polynitro
    electronic structure
    thermodynamic properties
    crystal structure
    detonation performance
    stability
    Opis:
    A novel polynitro compound, 2,2’-bis(trinitromethyl)-5,5’-azo- 1,2,3,4-tetrazole, was designed and investigated at the DFT-B3LYP/6-31G(d) level. Its properties, such as electronic structure, IR spectrum, heat of formation, thermodynamic properties and crystal structure, were predicted. This compound is most likely to crystallize in the P21 space group, and the corresponding cell parameters are Z = 2, a = 5.46 Å, b = 9.72 Å, c = 14.05 Å, α = 90°, β = 90°, γ = 90°. In addition, the detonation velocity and pressure were also estimated by using the empirical Kamlet-Jacobs equations, and were predicted to be 8.28 km/s and 31.61 GPa respectively. The oxygen balance of this compound is +13.79%, which indicates that it could serve as an oxidizer. Bond dissociation energy calculations show that the C(13)-N(21)O2 and C(14)-N(30)O2 bonds are the locations of thermal decomposition and that this compounds meets the thermal stability requirements as an exploitable explosive. Keywords: polynitro, electronic structure, thermodynamic properties, crystal structure, detonation performance, stability.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 3; 325-338
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermally induced damage in hexanitrohexaazaisowurtzitane
    Autorzy:
    Tian, Q.
    Yan, G.
    Sun, G.
    Huang, C.
    Xie, L.
    Chen, B.
    Huang, M.
    Li, H.
    Liu, X.
    Wang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358735.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    CL-20
    SAXS
    AFM
    thermal effects
    voids
    Opis:
    The evolution of the microstructure of hexanitrohexaazaisowurtzitane (CL-20) after a thermal stimulus plays a key role in the performance of CL-20. In the current work, microstructural variations of CL-20 caused by thermal treatment were investigated by X-ray diffraction, in situ variable-temperature optical microscopy, atom force microscopy, and small-angle X-ray scattering. A wave-like process, an abrupt volume expansion, movement, and fragmentation of CL-20 particles during phase transition were observed. After the phase transition (160 °C) the CL-20 sample acquired a very rough surface with numerous dimple depressions, and during the thermal decomposition stage (200 °C) a large number of voids were produced in both the bulk and the surface of the CL-20.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 3; 359-369
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Bending, Impact Fracture Behavior and Characteristics of Stainless Steel Clad Plates with Different Rolling Temperature
    Autorzy:
    An, Q.
    Fan, K. Y.
    Ge, Y. F.
    Liu, B. X.
    He, J.
    Wang, S.
    Chen, C. X.
    Ji, P. G.
    Tolochko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049433.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stainless steel clad plate
    interface characteristics
    bending behavior
    impact morphologies
    delamination crack
    Opis:
    The interface characteristics, bending and impact behavior, as well as fracture characteristics of stainless steel clad plates fabricated by vacuum hot rolling at different rolling temperatures of 1100°C, 1200°C and 1300°C are investigated in detail. The interface bonding strength is gradually increased with the increasing rolling temperature due to the sufficient diffusion behavior of alloy element. The bending toughness and impact toughness are gradually decreased, while the bending strength increase with the increase of the rolling temperature, which is attributed to mechanisms of matrix softening and interface strengthening at high rolling temperature. Due to the weak interface at 1100°C, the bending and impact crack propagation path was displaced by delamination cracks, which in turn lead to reduction in stress intensity of the main crack, playing an effective role in toughening the stainless steel clad plates. Moreover, the impact fracture morphologies of clad plates show a typical ductile-brittle transition phenomenon, which is attributed to the matrix softening behavior with the increasing rolling temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 229-239
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Coating of LiBH4 and Its Effect on the Decomposition of RDX and AP
    Autorzy:
    Ding, X.
    Shu, Y.
    Chen, Z.
    Liu, N.
    Gou, B.
    Zhang, J.
    Wu, M.
    Xie, G.
    Dang, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/358086.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    coating
    hydride
    additive
    hygroscopicity
    DSC
    Opis:
    The novel fuel additive LiBH4 was introduced as an energetic component for its outstanding hydrogen content, perfect burning performance and high reactivity. In order to limit the hygroscopicity and to improve the stability in the air, LiBH4 was coated on the surface with wax and polyester carbonate. The final product was characterized by scanning electron microscopy (SEM), X-ray photoelectron energy spectroscopy (XPS) and Raman spectroscopy, while the stability in air was investigated by regular checking of variations in weight. The results show that a uniform coating layer was formed on the surface of the LiBH4, and the coverage was estimated from the boron content as approximately 82%. A healing effect was confirmed on defective surfaces exposed to air; the coating layer improves the relative stability by 50.7%. Furthermore, LiBH4 as an additive to promote the thermal decomposition of 1,3,5-trinitro-1,3,5-trazinane (RDX) and ammonium perchlorate (AP) was explored by differential scanning calorimetry (DSC), in which the catalytic effects of pure LiBH4 and coated LiBH4 were compared, and indicated that the coating does not decrease the reactivity of LiBH4. It is suggested that surface coating with some inert materials is a simple and effective method for improving the storage and performance of LiBH4, while ensuring its reactivity.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 1; 134-151
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Microstructural Evolution in HMX Based Plastic-bonded Explosive During Heating and Cooling Process: an in situ Small-angle Scattering Study
    Autorzy:
    Yan, G.
    Tian, Q.
    Liu, J.
    Fan, Z.
    Sun, G.
    Zhang, C.
    Wang, Y.
    Chen, B.
    Gong, J.
    Zhou, X.
    Yang, Z.
    Nie, F.
    Li, J.
    Li, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/358618.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    SANS
    SAXS
    HMX-PBX
    thermal damages
    phase transition
    Opis:
    The thermal damage in octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) based plastic-bonded explosive (PBX) was investigated using in situ small-angle neutron and X-ray scattering techniques. The microstructural evolution was quantitatively characterized by the model fitting parameters of total interfacial surface area (Sv) and void volume distribution. The Sv of HMX-PBX decreased markedly above 100 °C, indicating the movement of binder into the voids. After subsequent cooling to room temperature, the scattering intensity increased significantly with increasing storage time, and a new population of voids with average diameter of 20 nm was observed, accompanied by the gradual phase transition of HMX from δ- to β-phase. The experimental results implied that serious damage within the HMX-PBX was developed during storage after heating.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 4; 916-926
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    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:
    Optimal expression and purification of sapelovirus A structural protein VP1, and its immunogenicity in mice
    Autorzy:
    Zhao, T.T.
    Cui, L.
    Chen, L.
    Li, J.J.
    Liang, Q.L.
    Wu, P.J.
    Yu, X.Q.
    Zhang, Z.H.
    Hua, X.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087686.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sapelovirus A
    prokaryotic expression
    purification
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 573-579
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antibacterial spectrum of four compounds from yeasts in koumiss
    Autorzy:
    Chen, Y.J.
    Du, C.G.
    Guo, Y.Q.
    Zhao, Y.F.
    Aorigele, C.
    Wang, C.J.
    Simujide, H.
    Aqima, W.
    Zhang, X.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087160.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Kluyveromyces marxianus
    Saccharomyces cerevisiae
    Escherichia coli
    minimum inhibition concentration
    minimum bactericidal concentration
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 2; 167-173
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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