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Wyszukujesz frazę "Kong, L." wg kryterium: Autor

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    Wyświetlanie 1-13 z 13
    Tytuł:
    Multiple solutions for fourth order elliptic problems with p(x)-biharmonic operators
    Autorzy:
    Kong, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/254793.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    critical points
    p(x)-biharmonic operator
    weak solutions
    mountain pass lemma
    Opis:
    We study the multiplicity of weak solutions to the following fourth order nonlinear elliptic problem with a p(x)-biharmonic operator [formula] where Ω is a smooth bounded domain in RN, [formula] is the p(x)-biharmonic operator, and λ > 0 is a parameter. We establish sufficient conditions under which there exists a positive number λ* such that the above problem has at least two nontrivial weak solutions for each λ > λ*. Our analysis mainly relies on variational arguments based on the mountain pass lemma and some recent theory on the generalized Lebesgue-Sobolev spaces [formula].
    Źródło:
    Opuscula Mathematica; 2016, 36, 2; 253-264
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical study of the effect of probe shape on adhesion force between probe and substrate in atomic force microscope experiment
    Autorzy:
    Yang, L.
    Hu, J.
    Kong, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/949319.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    probe shape
    adhesion force
    van der Waals force
    capillary force
    relatively humidity
    liquid bridge
    Opis:
    The quantitative description of adhesion force dependence on the probe shapes are of importance in many scientific and industrial fields. In order to elucidate how the adhesion force varied with the probe shape in atomic force microscope manipulation experiment, we performed a theoretical study of the influences of the probe shape (the sphere and parabolic probe) on the adhesion force at different humidity. We found that the combined action of the triple point and the Kelvin radius guiding the trend of the adhesion force, and these two fundamental parameters are closely related to the probe shape. Whilst, the theoretical results demonstrate that the adhesion force is in good agreement with the experiment data if the van der Waals force is taken into account.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2015, 53, 1; 235-241
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uniqueness and parameter dependence of positive doubly periodic solutions of nonlinear telegraph equations
    Autorzy:
    Graef, J. R.
    Kong, L.
    Wang, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/255148.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    telegraph equation
    doubly periodic solution
    Green's functions
    Opis:
    The authors study a type of second order nonlinear telegraph equation. The existence and uniqueness of positive doubly periodic solutions are discussed. The parametric dependence of the solutions is also investigated. Two examples are given as applications of the results.
    Źródło:
    Opuscula Mathematica; 2014, 34, 2; 363-373
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multiple solutions for systems of multi-point boundary value problems
    Autorzy:
    Graef, J. R.
    Heidarkhani, S.
    Kong, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/255713.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    multiple solutions
    multi-point boundary value problem
    critical point theory
    Opis:
    In this paper, we establish the existence of at least three solutions of the multi-point boundary value system [formula]. The approaches used are based on variational methods and critical point theory.
    Źródło:
    Opuscula Mathematica; 2013, 33, 2; 293-306
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel in-phase disposition SPWM pulse allocation strategy for cascaded H-bridge inverter
    Autorzy:
    Zhang, Y.
    Xiong, J.
    Kong, L.
    Wang, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/141155.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    in-phase disposition SPWM
    Inverter
    CHB
    THD
    Opis:
    A novel in-phase disposition (IPD) SPWM pulse allocation strategy applied to a cascaded H-bridge (CHB) converter is presented in this paper. The reason causing the power of the CHB converter imbalance is analyzed according to the traditional structure, the conception of power imbalance degree is introduced and the principle of the novel in-phase disposition SPWM allocation strategy is deduced in detail. The new pulse allocation scheme can ensure the power balance in 3/4 cycles through interchanging the PWM pulse sequence of the different CHB cell, meanwhile it makes the full advantage of the IPD control strategy, lower the total harmonic distortion (THD) of line voltage compared to a carrier phase shifted (CPS) control strategy, which is verified by theoretical derivation. A seven-level cascaded inverter composed by three H-bridge cells is taken as the example. The simulation and experiment is performed. The results indicate the validity of the analysis and verify the effectiveness of the proposed SPWM allocation strategy.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 2; 361--375
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of heating uniformity in radio frequency heating systems using carrot and radish
    Autorzy:
    Kong, L.
    Min, Z.
    Wang, Y.
    Adhikari, B.
    Yang, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/25929.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Lack of heating uniformity is a major problem impeding the broader adaptation of radio frequency heaters in industrial applications. The overall aim of this study was to evaluate the uniformity of heating or temperature distribution within food samples (three different carrot and one radish rectangles) placed vertically and horizontally within a radio frequency heating cavity. The intensity of the electric field in radio frequency was found to be symmetrical. The temperatures at the vertically top positions were lower than the vertically bottom positions at the equidistance from the vertical center with the highest was at the vertically central position. The rate of temperature rise at all the positions were higher in taller (higher mass) than the shorter (lower mass) rectangles of carrots. The temperatures at the corners and edges were lower than at the cross sectionally central positions at all the heights tested in both carrots and radishes. The rate of temperature rise at all the vertical positions was higher in radish rectangles than in the carrot rectangles of the same dimensions. The similarity of temperature distribution in carrot and radish rectangles suggested that the heating patterns and uniformity in carrots and radishes in RF heating were almost the same.
    Źródło:
    International Agrophysics; 2016, 30, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    iTRAQ-based quantitative proteomics analysis reveals inhibitory mechanismsof the antimicrobial peptide MDAP-2 against Salmonella gallinarum
    Autorzy:
    Zhang, Y.
    Yu, S.
    Ying, X.
    Jia, B.
    Liu, L.
    Liu, J.
    Kong, L.
    Pei, Z.
    Ma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087299.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Salmonella gallinarum
    AMP
    iTRAQ
    inhibitory mechanism
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 3; 405-414
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological characteristics of a new antibacterial peptide and its antibacterial mechanisms against Gram-negative bacteria
    Autorzy:
    Pei, Z.
    Ying, X.
    Tang, Y.
    Liu, L.
    Zhang, H.
    Liu, S.
    Zhang, D.
    Wang, K.
    Kong, L.
    Gao, Y.
    Ma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087656.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    antimicrobial peptide
    biological characteristics
    antibacterial mechanism
    Gram-negative bacteria
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 533-542
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-communicable diseases in the Asia-Pacific region: Prevalence, risk factors and community-based prevention
    Autorzy:
    Low, Wah-Yun
    Lee, Yew-Kong
    Samy, Alexander L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2177003.pdf
    Data publikacji:
    2015-02-24
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    non-communicable diseases (NCDs)
    urbanization
    hypertension
    obesity
    community-based prevention
    inter-sectorial collaboration
    Opis:
    Non-communicable diseases (NCDs) lead to substantial mortality and morbidity worldwide. The most common NCDs are cardiovascular diseases (CVD), diabetes, cancer and chronic respiratory diseases. With the rapid increase in NCD-related deaths in Asia Pacific countries, NCDs are now the major cause of deaths and disease burden in the region. NCDs hamper achievement of the Millennium Development Goals (MDG). People in the low socio-economic group are most affected by NCDs as they have poor access to policies, legislations, regulations and healthcare services meant to combat NCDs. This results in loss of productivity by a decreasing labor force with implications at the macroeconomic level. The 3 major NCDs in the Asia Pacific region are CVDs, cancer and diabetes due to the increasing loss of disability adjusted life years (DALYs). The 4 major behavioral risk factors for NCDs are: tobacco use, alcohol consumption, inadequate physical activity and unhealthy diet. The underlying risk factors are urbanization, globalization, sedentary lifestyle, obesity and hypertension. Strategies to combat NCDs in the Asia Pacific region are as follows: population-based dietary salt reduction, health education, psychological interventions, i.e., cognitive behavioral therapy and motivational-interviewing, taxation and bans on tobacco-related advertisements, implementing smoke-free zones and surveillance by the World Health Organization. Control measures must focus on prevention and strengthening inter-sectorial collaboration.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2015, 28, 1; 20-26
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Continual mode transformation in a unidirectional compound waveguide
    Autorzy:
    Kong, W.
    Cai, Q.
    Lin, Z.-L.
    Fang, Y.-T.
    Powiązania:
    https://bibliotekanauki.pl/articles/173535.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    mode transformation
    unidirectional waveguide
    metal slabs
    Opis:
    We propose a new mechanism to achieve mode transformation. In a unidirectional air waveguide we place some metal slabs to form the unidirectional edge loop. Based on the effect of mode interference, the even mode or the odd mode can be completely canceled from their degenerated state through a precise adjustment of slab position, which leads to another mode to be released. By this mechanism, we have achieved continual transformations between even mode and odd mode.
    Źródło:
    Optica Applicata; 2018, 48, 1; 87-94
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Personal identification based on brain networks of EEG signals
    Autorzy:
    Kong, W.
    Jiang, B.
    Fan, Q.
    Zhu, L.
    Wei, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/329856.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    electroencephalogram signal
    personal identification
    brain network
    phase synchronization
    elektroencefalogram
    identyfikacja osobowa
    sieć mózgowa
    synchronizacja fazy
    Opis:
    Personal identification is particularly important in information security. There are numerous advantages of using electroencephalogram (EEG) signals for personal identification, such as uniqueness and anti-deceptiveness. Currently, many researchers focus on single-dataset personal identification, instead of the cross-dataset. In this paper, we propose a method for cross-dataset personal identification based on a brain network of EEG signals. First, brain functional networks are constructed from the phase synchronization values between EEG channels. Then, some attributes of the brain networks including the degree of a node, the clustering coefficient and global efficiency are computed to form a new feature vector. Lastly, we utilize linear discriminant analysis (LDA) to classify the extracted features for personal identification. The performance of the method is quantitatively evaluated on four datasets involving different cognitive tasks: (i) a four-class motor imagery task dataset in BCI Competition IV (2008), (ii) a two-class motor imagery dataset in the BNCI Horizon 2020 project, (iii) a neuromarketing dataset recorded by our laboratory, (iv) a fatigue driving dataset recorded by our laboratory. Empirical results of this paper show that the average identification accuracy of each data set was higher than 0.95 and the best one achieved was 0.99, indicating a promising application in personal identification.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 4; 745-757
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Stabilities and Elastic Constants of EuX (X = O, S, Se, and Te) Compounds at High Pressure
    Autorzy:
    Kong, B.
    Zhou, Z.
    Sun, X.
    Zhang, L.
    Ling-Hu, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400144.pdf
    Data publikacji:
    2013-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.-f
    46.70.-p
    61.43.-j
    75.50.-y
    Opis:
    The structural stabilities, elastic properties and charge transfers of EuX (X = O, S, Se, Te) compounds as a function of pressure are investigated extensively using first-principles calculations. The ground-state parameters, such as lattice constants, bulk modulus are predicted and compared with the available data, our results are satisfactory. The calculated phase transition pressures from the NaCl-type (B1) structure to the CsCl-type (B2) structure for EuX (X = O, S, Se, Te) also accord with the experiments. Particularly, the elastic constants of EuX (X = O, S, Se, Te) under zero pressure and high pressure are simulated appropriately for the first time via density functional theory. The softening behaviors of the elastic shear modulus $C_{44}$ under pressure for the B1 phase of EuX (X = O, S, Se, Te) are captured, which should be responsible for the pressure-induced structural phase transition in the EuX system. It is also suggested that the softening behavior might be induced partly by the p → d and f → d electron transfers of Eu atom under pressure. In addition, the aggregate elastic modulus (B, G, E), Poisson's ratio (σ), Debye temperature $\Theta p_{D}$ are also successfully obtained for both B1 and B2 phases of EuX.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 4; 720-727
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Internal Friction of Single Crystals, Bicrystals and Polycrystals of Pure Magnesium
    Tarcie wewnętrzne monokryształów, bikryształów i polikryształów czystego magnezu
    Autorzy:
    Jiang, W. B.
    Kong, Q. P.
    Magalas, L. B.
    Fang, Q. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/354563.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium
    single crystal
    bicrystal
    polycrystal
    grain boundary
    internal friction
    magnez
    monokryształ
    bikryształy
    polikryształ
    granica ziarna
    tarcie wewnętrzne
    Opis:
    The internal friction of magnesium single crystals, bicrystals and polycrystals has been studied between room temperature and 450°C. There is no internal friction peak in the single crystals, but a prominent relaxation peak appears at around 160°C in polycrystals. The activation energy of the peak is 1.0 eV, which is consistent with the grain boundary self-diffusion energy of Mg. Therefore, the peak in polycrystals can be attributed to grain boundary relaxation. For the three studied bicrystals, the grain boundary peak temperatures and activation energies are higher than that of polycrystals, while the peak heights are much lower. The difference between the internal friction peaks in bicrystals and polycrystals is possibly caused by the difference in the concentrations of segregated impurities in grain boundaries.
    Badania tarcia wewnętrznego w monokryształach, bikryształach i polikryształach magnezu przeprowadzono w zakresie temperatur między temperaturą pokojową a 450°C. W monokryształach magnezu nie występuje pik tarcia wewnętrznego, ale wyraźny pik relaksacyjny pojawia się przy około 160°C w polikryształach. Energia aktywacji piku wynosi 1,0 eV, co jest zgodne z energią autodyfuzji Mg przez granice ziaren. Z tego względu pik tarcia wewnętrznego występujący w polikryształach można przypisać relaksacji granic ziaren. W przypadku trzech badanych bikryształów temperatury pików pochodzących od granic ziaren i ich energie aktywacji są wyższe niż w przypadku polikryształów, ale wysokości tych pików są znacznie niższe. Różnica między pikami tarcia wewnętrznego w bikryształach i polikryształach jest prawdopodobnie spowodowana przez różnicę stężeń zanieczyszczeń segregujących na granicach ziaren.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 1; 371-375
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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