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    Wyświetlanie 1-10 z 10
    Tytuł:
    Desensitization by Pre-shocking in Heterogeneous Explosives and its Numerical Modelling
    Autorzy:
    Hussain, T.
    Yan, L.
    Fenglei, H.
    Yi, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358221.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    shock desensitization
    desensitization criterion
    ignition and growth
    Lee-Tarver model
    detonation quenching
    reflected shock ignition
    EDC
    Opis:
    Desensitization caused by pre-shocking in heterogeneous explosives is discussed. The aim of this study was to find a simple numerical model that could reproduce the important features of previously reported shock desensitization experiments. After reviewing the previous experimental results and modelling efforts, an extension of the Lee-Tarver reactive flow model is proposed. The proposed desensitization model is based upon the experimentally determined desensitization criteria for explosives. The additional parameters required for this extension can be calibrated by experiment for a typical explosive. The new model has been implemented in the hydrodynamic code LS-DYNA as a user defined equation of state, and is now available to simulate various kinds of situations involving explosives up to the limits and capabilities of LS-DYNA. Desensitization by pre-shocking in double shock experiments, reflected shock and detonation quenching experiments have been studied using the new model, and the results were found to be in qualitative agreement with the experimental results reported in the literature.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 2; 357-379
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison and Analysis of Magnetic-Geared Permanent Magnet Electrical Machine at No-Load
    Autorzy:
    Liu, X.
    Chen, D.
    Yi, L.
    Zhang, Ch.
    Wang, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/140663.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnetic gear
    MGPM electrical machine
    quantitative comparison
    finite element analysis
    no load
    Opis:
    Magnetic-geared permanent magnet (MGPM) electrical machine is a new type of machine by incorporating magnetic gear into PM electrical machine, and it may be in operation with low-speed, high-torque and direct-driven. In this paper, three types of MGPM machines are present, and a quantitative comparison among them is performed by finite element analysis (FEA). The magnetic field distribution, stable torque and back EMF are obtained at no-load. The results show that three types of MGPM machine are suitable for different application fields respectively according to their own advantages, such as high torque and back EMF, which form an important foundation for MGPM electrical machine research.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 4; 683-692
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Barycenter reflected equatorial Pacific sea level structure evolution and its indication of ENSO events
    Autorzy:
    Luo, W.
    Yi, L.
    Yu, Z.
    Sun, H.
    Yuan, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/49107.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sea level
    El Nino-Southern Oscillation
    Equatorial Pacific
    satellite altimetry
    principal tensor analysis
    barycenter method
    Źródło:
    Oceanologia; 2015, 57, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physiological adaptations to osmotic stress and characterization of a polyethylene glycol-responsive gene in Braya humilis
    Autorzy:
    Lirong, W.
    Pengshan, Z.
    Xin, Z.
    Xiaopeng, W.
    Xiaofei, M.
    Yi, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/58230.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    physiological adaptation
    osmotic stress
    polyethylene glycol
    gene
    Braya humilis
    drought
    expression pattern
    Opis:
    Braya humilis (Brassicaceae) is a widely distributed plant in arid and semi-arid regions of northern Asia. This plant is well adapted to extremely arid conditions and is a promising candidate species to discover novel drought tolerance strategies. However, not much information about the mechanism(s) mediating drought resistance in this species is currently available. Therefore, the present study aimed to characterize the physiological traits and expression patterns of a polyethylene glycol (PEG)-responsive gene in B. humilis responding to different levels of osmotic stress induced by PEG-6000. Several important physiological parameters were examined, including the levels of relative water content, soluble protein, malondialdehyde, and antioxidant enzyme activity. A tolerance threshold between 20 and 30% PEG-6000 was identified for B. humilis. The water status and oxidative damage below this threshold were maintained at a relatively constant level during the 12 h of treatment. However, once the threshold was exceeded, the water status and oxidative damage were obviously affected after treatment for 4 h. The soluble protein results suggest that B. humilis maintains a vigorous resistance to osmotic stress and that it may play a greater role in osmotic regulation at late stages of stress. Moreover, superoxide dismutase and catalase may be important at preventing oxidative damage in plants at early stages of stress, while peroxidase may be more involved in some biological processes that resist osmotic stress at the late stage, especially in severely damaged plants. Furthermore, a PEG-responsive gene, BhCIPK12, was identified by differential display reverse transcription-polymerase chain reaction (PCR), cloned, and characterized by quantitative real-time PCR. We hypothesized that this gene may play an important role in mediating osmotic stress or drought resistance in plants. Altogether, these results provide valuable insights into the mechanism(s) mediating drought tolerance in B. humilis.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2016, 85, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relationship between fracture toughness and temperature in epoxy coatings
    Odporność powłok epoksydowych na kruche pękanie w funkcji temperatury
    Autorzy:
    Bo, Z.
    Jing-wei, L.
    Shu-guang, L.
    Yi-hui, L.
    Ju-tao, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/946951.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    epoxy resin
    fracture toughness
    żywica epoksydowa
    kruche pękanie
    Opis:
    The fracture toughness KIC of nine kinds of epoxy coating specimens was tested in the temperature range from 20 to -40 °C, and the influence of temperature on KIC was discussed. The results showed that KIC decreases sharply in unmodified systems but increases for some specimens with 20—50 portions of rubber impact modifier. The elastic modulus test indicated that KIC is closely related with the modulus. Scanning Electron Microscopy images showed that the introduction of impact modifier to epoxy can enlarge the ductile deformation of the fracture surface. As a result, the addition of rubber modifier is a suitable path to improve the anti-cracking performance of epoxy coatings at low temperature due to an increase of fracture toughness and reduction of elastic modulus, which thus can reduce the thermal stress in the process of cooling.
    Zbadano odporność na kruche pękanie (KIC) dziewięciu rodzajów powłok epoksydowych w zakresie temperatury -40—20 °C. Wyniki badań wskazują, że wartość KIC powłok epoksydowych bez udziału modyfikatora (polimeru uretanowego DESMOCAP 11) zmniejsza się gwałtownie wraz z obniżeniem temperatury. Dodatek modyfikatora, w ilości 20—50 g/100 g żywicy, zwiększa odporność powłok na kruche pękanie. Na podstawie analizy SEM stwierdzono, że wprowadzenie do żywicy epoksydowej modyfikatora DESMOCAP 11 powoduje zmniejszenie deformacji plastycznej powierzchni powłoki poddanej uderzeniu. Wykazano też, że obecność modyfikatora powoduje zmniejszenie wartości modułu Younga i wpływa korzystnie na odporność powłok epoksydowych na naprężenie termiczne związane z procesem chłodzenia.
    Źródło:
    Polimery; 2015, 60, 4; 258-263
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of Phyllosticta hostae causing Phyllosticta leaf spot on spider lily in China
    Autorzy:
    Yi, R.H.
    Gan, L.J.
    Chen, J.
    Xu, X.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/66837.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Phyllosticta hostae
    leaf spot
    plant disease
    spider lily
    Hymenocallis littoralis
    tropical plant
    herb
    China
    Opis:
    Leaf spot disease on the spider lily [Hymenocallis littoralis (Jacq.) Salisb.] continues to cause serious problems in China. To confirm the pathogen, the pathogenicity of isolates from diseased leaves was tested according to Koch’s postulates. The isolates were tentatively identified using morphological characteristics and confirmation was done by phylogenetic analysis of the translation elongation factor 1-alpha gene (TEF1), the actin gene (ACT), and internal transcibed spacer (ITS) sequences using neighbor-joining (NJ), maximum parsimony (MP), and Bayesian inference (BI) methods. The pathogen was identified as Phyllosticta hostae. Molecular analysis indicated very little diversity in the TEF1, ACT, and ITS gene. This is the first report of P. hostae causing leaf spot disease on spider lily in China.
    Źródło:
    Journal of Plant Protection Research; 2015, 55, 4
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Responses of plant species to different aboveground removal treatments with implications for vegetation restoration in the Mu Us Sandland (Inner Mongolia)
    Autorzy:
    Li, H.
    Yi, S.
    Lai, L.
    Zhou, J.
    Sun, Q.
    Jiang, L.
    Gao, Y.
    An, P.
    Shimizu, H.
    Zheng, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/57151.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    It is generally assumed that plants can respond to varying degrees of physical damage by growth compensation via resprouting, and resprouting is a key functional trait in many species. Few studies have investigated how grass and shrub species distributed in moving dunes and semifixed dunes in semiarid areas respond to the combined effects of temperature and shoot removal. Medicago sativa, Artemisia ordosica, and Artemisia sphaerocephala plants were grown in a glasshouse for 8 weeks at air temperatures of 10/20°C, 12.5/22.5°C, 15/25°C, and 17.5/27.5°C (night/day) and were subjected to treatments of removing all leaves (LR), removing all leaves followed by cutting at half the plant height (HC), and removing all aboveground tissue (WC). The species, temperature, and damage extent had significant effects on the shoot number, leaf mass ratio, leaf area ratio and ratio of belowground to aboveground dry matter, and the species had a significant effect on the net assimilation rate, specific leaf area, and total biomass. The three species grew well under the HC and LR treatments, and high temperatures (15/25°C and 17.5/27.5°C) significantly promoted the regrowth of the three species. Medicago sativa grew faster than the two Artemisia species. Medicago sativa can be used for fertilizing or vegetation restoration in unimportant conservation areas, and the two Artemisia species can be effectively used for vegetation restoration in the Mu Us Sandland. Due to the low labor costs and the local climate conditions, plants should be clipped before the beginning of the main growing season (end of May or early June) to ensure rapid growth.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2019, 88, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ag+/S2O8 2– system for the degradation of aqueous flutriafol
    Autorzy:
    Yang, H.
    Zhou, W.
    Yang, L.
    Deng, J.
    Hu, Q.
    Wei, H.
    Au, C.
    Yi, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/207760.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    chemical analysis
    degradation
    free radicals
    metal ions
    molecular orbital
    transition metals
    analiza chemiczna
    degradacja
    wolne rodniki
    jony metali
    orbital molekularny
    metale przejściowe
    Opis:
    The degradation of flutriafol in aqueous persulfate (S2O82–) system in the presence of selected transition metal ions was investigated. In the presence of Ag+ or Fe2+, flutriafol degradation occurs, whereas in the presence of Mn2+, Co2+, Ni2+, Cu2+, Zn2+ and Bi3+ ions, the degradation is less than 15%. The Ag+/ S2O82– aqueous system being the most effective was adopted for experimental and theoretical investigations. It was confirmed that pH of 3.0 is the most suitable, and that both · SO4–and ·OH– radicals are the main active species to afford flutriafol degradation, with the former contributes more than the latter. To elucidate degradation mechanism, molecular orbital calculations were performed and reaction intermediates identified by GC/MS and HPLC/MS/MS analyses. Three degradation pathways are proposed that involve the cleavage of C–N and C–C bonds as a result of ·SO4– attack, as well as the formation of hydroxylated products due to · OH radicals.
    Źródło:
    Environment Protection Engineering; 2018, 44, 2; 57-72
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Discoloration of Cotton/Kapok Indigo Denim Fabric by Using a Carbon Dioxide Laser
    Odbarwianie tkanin typu denim z mieszanek bawełny i kapoku poprzez zastosowanie lasera
    Autorzy:
    Du, W.
    Gosh, R. C.
    Zuo, D.-Y.
    Zou, H.-T.
    Tian, L.
    Yi, C.-H.
    Powiązania:
    https://bibliotekanauki.pl/articles/949450.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    kapok fibre
    denim fabric
    laser treatment
    colour-fading
    air permeability
    włókna kapok
    tkaniny denim
    obróbka laserowa
    przepuszczalność powietrza
    Opis:
    In this work, a carbon dioxide laser was used for the color-fading treatment of cotton/kapok denim fabrics. The results were analyzed thoroughly and compared with those of cotton denim fabric and PET denim fabric. Results showed that with laser treatment, the fabrics were colour-faded, and the K/S value of cotton/kapok fabric was reduced, while there was little change in the thickness and permeability. Because the internal air of the kapok fiber was squeezed out, the tensile strength of the fabric was decreased. The influence of laser power and speed on the kapok denim was also investigated. With an increase in the laser power and decrease in the speed, both the K/S values and strength decreased significantly. However, the changes were negligible for the thickness and permeability of the cotton/kapok denim fabric. It is therefore concluded that kapok is a good denim fabric material for the laser process.
    Wyniki analizowano i porównywano z wynikami uzyskiwanymi z tkanin denim z bawełny i PET. Wyniki wykazały, że przy zastosowaniu lasera zredukowano intensywność koloru, a wartość K/S została zredukowana przy małych zmianach grubości i przepuszczalności powietrza. Ponieważ wewnętrzne powietrze zawarte we włóknach kapoku było wyciskane na zewnątrz, wytrzymałość tkanin została zmniejszona. Badano również wpływ mocy lasera oraz szybkości przesuwania tkaniny denim na wartość KS i wytrzymałość. Stwierdzono, że wraz ze wzrostem mocy lasera i zmniejszeniem szybkości przesuwu tkaniny zarówno wartość KS jak i wytrzymałość zostały znacznie zmniejszone. Jednakże, zmiany grubości i przepuszczalności powietrza były minimalne. Stwierdzono, że włókna kapok są dobrym materiałem do tkanin typu denim.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2016, 4 (118); 63-67
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic rheology and microstructure of starch gels affected by triticale genomic composition and developing stage
    Autorzy:
    Cornejo-Ramirez, Y.I.
    Cinco-Moroyoqui, F.J.
    Carvajal-Millan, E.
    Brown-Bojorquez, F.
    Rosas-Burgos, E.C.
    Burgos-Hernandez, A.
    Martinez-Cruz, O.
    Del Toro-Sanchez, C.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/24257.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2019, 33, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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