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    Wyświetlanie 1-12 z 12
    Tytuł:
    Wild food plants and wild edible fungi of Heihe valley ( Qinling Mountains, Shaanxi, central China): herbophilia and indifference to fruits and mushrooms
    Autorzy:
    Kang, Y.
    Luczaj, L.
    Ye, S.
    Zhang, S.
    Kang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/58397.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2012, 81, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Digital volume correlation in an environment with intensive salt-and-pepper noise and strong monotonic nonlinear distortion of light intensity
    Autorzy:
    Tu, P.
    Bai, Y.
    Xu, W.
    Dong, B.
    Ye, S.
    Yang, Q.
    Zhou, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/173712.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    digital volume correlation
    correlation function
    salt-and-pepper noise
    nonlinear effects
    Opis:
    Digital volume correlation is an image-based technique for internal 3D displacement and strain fields measurement or analysis widely used in the field of experimental mechanics. A widely used correlation function (criterion) of digital volume correlation is Pearson correlation function, which suffers from the problem of the acquired data being contaminated by salt-and-pepper noise and monotonic nonlinear distortion of the light intensity. In this work, a 3D correlation function called the Spearman correlation function is used to deal with those interferences. A numerical experiment shows that the performance of Spearman correlation function using integer-pixel registration in an environment with 10% salt-and-pepper noise is better than that of Spearman and Pearson correlation functions using sub-pixel registration in an environment with 1% salt-and-pepper noise. As the light intensity distortion is significant, the error of Pearson correlation function is considerable; meanwhile, the error of Spearman correlation function is small. In conclusion, Spearman correlation function is, in particular, practical and useful in digital volume correlation.
    Źródło:
    Optica Applicata; 2017, 47, 2; 209-223
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Нейромедіаторні механізми когнітивних порушень в щурів при довготривалому пентиленететразоловому кіндлінзі
    Neurotransmitter mechanisms of rats cognitive impairments in prolonged pentylenetetrazol-induced kindling
    Autorzy:
    Vastyanov, R. S.
    Prishchepa, Ye. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032246.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Kazimierza Wielkiego w Bydgoszczy
    Tematy:
    pentylenetetrazol
    kindling
    noradrenergic and serotoninergic neurotransmitter systems
    conditioned reflex
    cognitive impairments
    Opis:
    The data of experimental trials devoted to prolonged pentylenetetrazol (PTZ) kindling neurotransmitter mechanisms investigation are given. The authors studied the peculiarities of the conditioned reflex (CR) formation, its both preservation and inhibition in kindled rats in conditions of adrenergic and serotoninergic neurotransmitter systems activity modulation. The data obtained showed that kindled rats develop cognitive impairment as CR formation repression, inability of its saving and rapid inhibition. These impairments expression progresses in the chronic seizure activity model dynamics. Revealed mnestic disorders were found in kindling rats in case of both adrenergic and serotoninergic neurotransmitter systems activation that shows their pathogenetic importance in the context of prolonged PTZ-induced kindling.
    Źródło:
    Journal of Health Sciences; 2014, 4, 6; 147-156
    1429-9623
    Pojawia się w:
    Journal of Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Structure, Variables and Interdependence of the Factors of Mental States of Expectations in Students’ Academic and Professional Activities
    Autorzy:
    Popovych, Igor S.
    Blynova, Olena Ye.
    Powiązania:
    https://bibliotekanauki.pl/articles/1967756.pdf
    Data publikacji:
    2019-03-31
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    academic and professional activities
    mental state of expectations
    expected situation
    realization of expectations
    structure of mental state of expectations
    Opis:
    The study presents the content-analysis (n=135) and factor analysis of students’ mental states of expectations (n=123). The understanding of mental states of expectations by education workers allows for the operationalization of the process of solving tasks of students’ academic and professional training. The purpose is to examine the structure, variables and interdependence of the factors of students’ mental states of expectations. The research methods are content-analysis, tests with standardized questionnaires, factor analysis. Factor analysis was used to determine the structure of mental states of expectations. The principal factor in this structure is F1“meaning-of-life moderation” (20.70%), which is interrelated with F2 “pragmatic regulation” (=.404; p≤.01) and F3 “subjective regulation” (=.357; p≤.01). The obtained results could be useful for education directors organizing the academic process of students, and also for scientists in the field of psychology of expectations, psychology of constructing the future.
    Źródło:
    The New Educational Review; 2019, 55; 293-306
    1732-6729
    Pojawia się w:
    The New Educational Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assault high protection level armor helmets based on ceramics and organic fiber-reinforced composites
    Autorzy:
    Kharchenko, Ye.F.
    Aniskovich, V.A.
    Gavrikov, I.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/237904.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Technologii Bezpieczeństwa Moratex
    Tematy:
    ceramika
    kompozyty organiczne
    hełmy ochronne
    protection helmets
    organic composites
    ceramics
    Źródło:
    Techniczne Wyroby Włókiennicze; 2009, R. 17, nr 2/3, 2/3; 22-24
    1230-7491
    Pojawia się w:
    Techniczne Wyroby Włókiennicze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of thermal treatment of the melt before crystallization on the structure and properties of castings
    Autorzy:
    Kondratyuk, S. Ye.
    Veis, V. I.
    Parkhomchuk, Z. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818512.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    steel
    aluminium alloy
    isothermal treatment
    crystallization
    heredity of structure
    mechanical properties
    stal
    stop aluminium
    obróbka izotermiczna
    krystalizacja
    dziedziczność struktury
    właściwości mechaniczne
    Opis:
    Purpose: The aim of the proposed research is to investigate the influence of temperature and duration of isothermal melt processing on structural characteristics of castings in connection with technological background of charge metal. Design/methodology/approach: Ferrous and non-ferrous alloys were obtained by remelting a charge with a dispersion-structured structure (which was ensured by high- speed crystallization). Remelting was carried out at different temperatures of overheating of the melt over the liquidus with different isothermal exposure at these temperatures. Experimental castings were crystallized under normal conditions. It was studied a change of structure formation and mechanical characteristics depending on the temperature and duration of thermal treatment of the melt before crystallization. Findings: It is established that isothermal treatment of the melt at the overheating of the liquid metal above a certain equilibrium temperature of the micro-inhomogeneous melt (Te) causes a gradual loss of hereditary characteristics of the original charge metal, increase of the chemical homogeneity of the melt and the formation of crystallization and formation a corresponding change in the mechanical properties of castings. Research limitations/implications: The results can be complemented by studies of the effect of thermal treatment in the temperature range of crystallization. Practical implications: The results can be used to select the optimal heat treatment during remelting and, accordingly, the mechanical properties of the resulting casting. Originality/value: The obtained results testify to the predominant influence of temperature on the dispersion of the cast structure of steels, given the duration of technological operations of preparation and casting of steels in the manufacture of castings in industrial conditions.
    Źródło:
    Archives of Materials Science and Engineering; 2020, 104, 1; 23--29
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic diversity and relationship of Hunan province of China local tree peonies based on SSR markers
    Autorzy:
    Zhang, M.-H.
    Jin, X.-L.
    Wen, Y.-F.
    Shen, S.
    Wen-Xing
    Wu, S.
    Lu, J.-H.
    Ye-Ye
    Powiązania:
    https://bibliotekanauki.pl/articles/12665369.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    China
    Hunan Province
    plant cultivation
    tree peony
    Paeonia suffruticosa
    ornamental plant
    genetic diversity
    genetic relationship
    SSR marker
    Opis:
    Paeonia sect. Moutan is a wide known ornamental plant in the world. The objective of this study was to provide the theoretical basis for scientific preservation and utilization of tree peony resources of Hunan province of China. Simple sequence repeat (SSR) markers were applied to reveal the genetic diversity and relationship of 21 tree peony resources and 45 domestic and foreign tree peony cultivars. Clear bands, the size of which ranged from 115 bp to 379 bp, were detected with 14 primers. In total, 90 alleles were detected and the number of alleles detected with one primer varied between 5 and 13; the number of effective alleles ranged from 1.183 to 2.070; the polymorphism ratio of each locus was 100%. The observed heterozygosity, which ranged from 0.120 to 0.851 with an average of 0.532, was larger than the expected one, which ranged from 0.090 to 0.470 with an average of 0.300. Shannon index ranged from 0.137 to 0.695 and fixation index ranged from −0.332 to −0.869. The results show abundant genetic diversity in tree peony of Hunan province and SSR markers distinguishing homonymous tree peony resources successfully.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 4; 213-223
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure formation and properties of overheated steel depending on thermokinetic parameters of crystallization
    Autorzy:
    Kondratyuk, S. Ye.
    Veis, V. I.
    Parkhomchuk, Z. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/367984.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    steel
    overheating
    structure
    crystallization
    cooling rate
    stal
    przegrzewanie
    struktura
    krystalizacja
    szybkość chłodzenia
    Opis:
    Purpose: The aim of the proposed research is to investigate the mutual influence of the temperature of an overheated melt and its cooling rate during crystallization on the formation of the cast structure and mechanical properties of structural steels. Design/methodology/approach: Two structural medium-carbon steels were melted in induction furnace and poured from temperatures 1520-1670°C into casting moulds with different heat removal ability. This ensured the crystallization and structure formation of the studied steel castings at cooling rates (Vc) of 5°C/sec (sand-clay mould), 45°C/sec (steel mould), 350°C/sec (water cooled copper mould). It was studied a change of structure formation, mechanical characteristics depending on the temperature-kinetic conditions of the processing of the melt. Based on the processing of the array of obtained experimental data using linear regression analysis and a software package, interpolation models and their graphic images obtained allow a quantitative assessment of the established patterns of structural characteristics and mechanical properties of the studied steels depending on melt temperature (T, °C) and its cooling rate (Vc, °C/sec) during crystallization and structure formation. Findings: Among the technological factors that determine the formation of the cast structure and the mechanical properties of steels, the dominant role is played by the intensity of heat removal during the solidification of castings. The high cooling rate of the melt during crystallization determines an increase in the number of crystallization nuclei due to an increase in the degree of supercooling of the melt, eliminates the negative effect of the high overheating temperature of the metal before casting. Research limitations/implications: In the future, the results can be complemented by studies of the influence of the duration of isothermal exposure of the melt at different temperatures of superheating and cooling conditions. Practical implications: The obtained mathematical models (regression equations) that determine the mutual influence of the cooling rate and the temperature of the melt overheating on the structure and mechanical properties of the studied steels make it possible to obtain steel castings with predetermined properties at the level of properties of wrought steel of similar chemical composition. Originality/value: Interpolation models that allow a quantitative assessment of the established patterns of structural characteristics and mechanical properties of the studied steels depending on the melt temperature (T, °C) and its cooling rate (Vc, °C/sec) during crystallization and structure formation are obtained.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2019, 97, 2; 49-56
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An efficient connected dominating set algorithm in WSNs based on the induced tree of the crossed cube
    Autorzy:
    Zhang, J.
    Xu, L.
    Zhou, S. M.
    Wu, W.
    Ye, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/330830.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wireless sensor networks
    connected dominating set
    induced tree
    approximation algorithm
    crossed cube
    bezprzewodowa sieć sensorowa
    podgrafy indukowane
    algorytm aproksymacyjny
    Opis:
    The connected dominating set (CDS) has become a well-known approach for constructing a virtual backbone in wireless sensor networks. Then traffic can forwarded by the virtual backbone and other nodes turn off their radios to save energy. Furthermore, a smaller CDS incurs fewer interference problems. However, constructing a minimum CDS is an NP-hard problem, and thus most researchers concentrate on how to derive approximate algorithms. In this paper, a novel algorithm based on the induced tree of the crossed cube (ITCC) is presented. The ITCC is to find a maximal independent set (MIS), which is based on building an induced tree of the crossed cube network, and then to connect the MIS nodes to form a CDS. The priority of an induced tree is determined according to a new parameter, the degree of the node in the square of a graph. This paper presents the proof that the ITCC generates a CDS with a lower approximation ratio. Furthermore, it is proved that the cardinality of the induced trees is a Fibonacci sequence, and an upper bound to the number of the dominating set is established. The simulations show that the algorithm provides the smallest CDS size compared with some other traditional algorithms.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 2; 295-309
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cobalt Additives Influence on Phase Composition and Defect Structure of Manganese Dioxide Prepared from Fluorine Containing Electrolytes
    Autorzy:
    Sokolsky, G.
    Ivanov, S.
    Ivanova, N.
    Boldurev, Ye.
    Kobulinskaya, O.
    Demchenko, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1550089.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Fn
    61.72.-y
    85.40.Ry
    Opis:
    Manganese dioxide samples were prepared from fluorine containing electrolytes with additives of $Co^{2+}$ ions. Atomic absorption spectroscopy, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis were the methods of the samples characterisation. Manganese dioxide at the presence of cobalt forms nanosized ramsdellite structure crystallites of mostly needle-like morphology with significant content of hydroxide groups. The main phase state in manganese dioxide samples obtained at the presence of cobalt is $γ-MnO_{2}$ with ramsdellite structure and low content of intergrowth defects. The sample doped both with lithium and cobalt can be indexed to a hollandite-type structure (tetragonal; space group I4/m) of $α-MnO_{2}$.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 86-90
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Early Miocene microtoid cricetid rodent from the Junggar Basin of Xinjiang, China
    Autorzy:
    Maridet, O.
    Wu, W.
    Ye, J.
    Meng, J.
    Bi, S.
    Ni, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/21577.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Microtoid cricetids are widely considered to be the ancestral form of arvicoline rodents, a successful rodent group includ− ing voles, lemmings and muskrats. The oldest previously known microtoid cricetid is Microtocricetus molassicus from the Late Miocene (MN9, ca. 10–11 Ma) of Europe. Here, we report a new microtoid cricetid, Primoprismus fejfari gen. et sp. nov., from the Junggar Basin of Xinjiang, northwestern China. The rodent assemblage found in association with this specimen indicates a late Early Miocene age, roughly estimated at 18–17 Ma, and thus more than 6 million years older than M. molassicus. While morphological comparisons suggest that the new taxon is most closely related to M. molas− sicus, it differs from the latter in a striking combination of primitive characters, including a lower crown, smaller size, a differentiated posterolophid and hypolophid, a faint anterolophid, the absence of an ectolophid, and the presence of a stylid on the labial border of the tooth. Arid conditions prevailing across the mid−latitude interior of Eurasia during the Early Miocene, enhanced by the combined effects of the Tibetan uplift and the gradual retreat of the Tethys Ocean, likely played a role in the appearance of grasslands, which in turn triggered the evolution of microtoid cricetids and, ultimately, the origin of arvicoline rodents.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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