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    Wyświetlanie 1-9 z 9
    Tytuł:
    A new brontothere from the Eocene of South China
    Autorzy:
    Averianov, A.
    Danilov, I.
    Chen, W.
    Jin, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/21665.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    The upper Eocene Youganwo Formation in Maoming Province, Guangdong Province, China, produced abundant remains of turtles and crocodiles, but mammalian remains are rare. The previously found mammals from Youganwo Formation include a nimravid carnivore and an amynodontid perissodactyl. Here we report on a new brontotheriid perissodactyl from the Youganwo Formation. Maobrontops paganus gen. et sp. nov. is described based on a maxillary fragment with P4 and M1–2 (SYSU-M-4). Maobrontops paganus gen. et sp. nov. is characterized by the combination of a simple P4 without a hypocone with derived molars having large molar fossae and large anterolingual cingular cusp. A parsimony implied weighting character analysis places Maobrontops gen. nov. in the clade Embolotheriita as a sister taxon to the terminal subclade containing Nasamplus, Protembolotherium, and Embolotherium. Maobrontops paganus gen. et sp. nov. is one of the largest Asian brontotheres. The brontotheriid fauna of South China is endemic and includes at least three valid taxa: Dianotitan from Brontotheriita and Pygmaetitan and Maobrontops gen. nov. from Embolotheriita.
    Źródło:
    Acta Palaeontologica Polonica; 2018, 63, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of sodium petroleum sulfonates with different molecular weights for flotation of kyanite ore
    Autorzy:
    Chen, B. Z.
    Gao, H.
    Li, Y.
    Jin, J.
    Ren, Z.
    Wang, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/109492.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    evaluation
    sodium petroleum sulfonate
    kyanite
    flotation kinetics
    entrainment
    Opis:
    The flotation performance of sodium petroleum sulfonates with different molecular weights was evaluated for flotation of a kyanite ore, by investigating valuable mineral recovery-grade, flotation kinetics and gangue entrainment. The results indicated that the higher molecular weight of agent, the higher final cumulative kyanite recovery was, with the maximum value of 72% being obtained with KY-3 with the molecular weight of 438. The final cumulative kyanite grade initially increased, and then decreased with the molecular weight increasing. In other words, the maximum final cumulative kyanite grade (i.e. 89.05%) was obtained with KY-2 with the molecular weight of 392. The kyanite flotation kinetics followed the first order kinetics well, while the modified flotation rate constant showed a decreasing trend after the initial increase as the molecular weight increased. In addition, the overall entrainment degree decreased with decreasing molecular weight of sodium petroleum sulfonates. The use of KY-2 in kyanite flotation was an attractive option in comparison with KY-1 and KY-3.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 2; 956-968
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accurate measurements and establishment of a model of the mechanical properties of dried corn kernels
    Autorzy:
    Feng, J.
    Wu, Z.
    Qi, D.
    Jin, Y.
    Wu, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082547.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    thin layer drying
    corn kernel
    mechanical property
    model
    Opis:
    Mechanical drying significantly affects the mechanical properties of corn kernels. Improper drying may result in material losses and in a decline in quality due to pressure, collisions, and other factors during subsequent storage and transport operations. A literature survey revealed that at time of writing the characteristics of dried corn kernels have not been systematically and fully studied. In this paper, an orthogonal rotation combination test scheme was designed. Using a multiparameter controllable thin layer drying test bench, corn was dried under different conditions (temperature 30-60°C, relative humidity 30-60%, air velocity 0.46-0.94 m s–1, initial moisture content of corn of 20-30% w.b., tempering ratio 0-3). Then, a texture analyser was used to measure the mechanical properties (rupture force, rupture energy, modulus of elasticity and brittleness) of the dried corn kernels. Relationship models were established for the rupture force, rupture energy, modulus of elasticity and brittleness and drying conditions of corn kernels. An increase in the drying temperature from 30 to 60°C increased the rupture energy, elastic modulus, and brittleness of the corn kernels by 19.11, 11.76, and 4.02%, respectively; an increase in the drying relative humidity from 30 to 60% increased the rupture force, energy, modulus of elasticity and brittleness by 15.07, 13.74, 20.73, and 3.31%, respectively.
    Źródło:
    International Agrophysics; 2019, 33, 3; 373-381
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model of eco-water driving force affecting the evolvement of runoff in the upper Minjiang River Basin
    Autorzy:
    Jin, H.
    Yang, W.
    Li, P.
    Ashraf, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259476.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    eco-water
    remote sensing quantitative retrieval
    upper Minjiang River
    runoff prediction
    Opis:
    The amount of eco-water resources reflects the land surface water conservation capability, and the underlying surface condition in the hydrologic cycle. In the upper Minjiang River Basin, the amounts of eco-water resources were retrieved from remotely sensed data during 1992 to 2005. Through regression analysis between the retrieved eco-water data and the climate hydrological data mainly including the temperature, the precipitation, and the runoff in the same period, the model of eco-water driving force affecting the evolvement of runoff was established. The accuracy analysis indicates that the model can well describe the relationship between dry season runoff and its driven factors, the measured data validation proves that the model has high precision and good practicability. The eco-water remote sensing inversion provides a valid method to quantify the land surface water conservation capability, and suggests an interesting approach for the driving function quantitative researches of underlying surface factor in the hydrologic cycle.
    Źródło:
    Polish Maritime Research; 2016, S 1; 91-96
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relationship Between Bake Hardening, Snoek-Köster and Dislocation-Enhanced Snoek Peaks in Coarse Grained Low Carbon Steel
    Autorzy:
    Lin, W.
    Zhao, S.
    Zhang, H.
    Jin, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/353663.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    low carbon steel
    ultra-low carbon bake-hardening (ULC-BH) steel
    bake hardening (BH)
    Snoek peak
    dislocation-enhanced Snoek peak
    Snoek-Köster peak
    internal friction
    Opis:
    In the present work, specimens prepared from coarse grained low carbon steel with different prestrains were baked and then, their bake hardening (BH) property and internal friction were determined. TEM was used to characterize the dislocation structure in BH treated samples. The measurements of internal friction in prestrained samples and baked samples were carried out using a multifunctional internal friction apparatus. The results indicate that, in coarse grained low carbon steel, the bake hardening properties (BH values) were negative, which were increased by increasing the prestrain from 2 to 5%, and then were decreased by increasing the prestrain from 5 to 10%. In the specimen with prestrain 5%, the BH value reached the maximum value and the height of Snoek-Köster peak was observed to be the maximum alike. With increasing the prestrain, both of the BH value and Snoek-Köster peak heights are similarly varied. It is concluded that Snoek-Köster and dislocation-enhanced Snoek peaks, caused by the interactions between interstitial solute carbon atoms and dislocations, can be used in further development of the bake hardening steels.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1723-1732
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Spectroscopy of Bearing Steel
    Spektroskopia mechaniczna stali łożyskowej
    Autorzy:
    Lu, X.
    Li, W.
    Jin, M.
    Min, N.
    Jin, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/351791.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bearing steel
    twin martensite
    mechanical spectroscopy
    internal friction
    Snoek-Köster peak
    stal łożyskowa
    bliźniacza struktura martenzytu
    atomy węgla
    spektroskopia mechaniczna
    tarcie wewnętrzne
    niskotemperaturowe zbocze szczytu Snoek-Köstera
    Opis:
    This study presents mechanical spectroscopy of bearing steel subjected to different heat treatments. A non-thermally activated maximum, P1, was found at 130°C, in quenched martensitic samples, which were austenitized at 1050°C and 860°C, and presented twin martensite microstructures. It is suggested that the mechanism of the P1 maximum, observed on the low-temperature side of Snoek-Köster peak, is related to the change of defect configurations in twinned martensite assisted with high mobility of the solute carbon atoms under an external harmonic stress field applied during mechanical loss measurements.
    W pracy przedstawiono wyniki badań spektroskopii mechanicznej stali łożyskowej poddanej różnej obróbce cieplnej. W hartowanych martenzytycznych próbkach, które były austenityzowane w 1050°C i 860°C, i posiadały bliźniaczą mikrostrukturę martenzytu, występuje nietermicznie aktywowane maksimum P1 przy 130°C. Sugeruje się, że mechanizm maksimum P1, które występuje na niskotemperaturowym zboczu piku Snoek-Köstera, związane jest ze zmianą konfiguracji defektów w bliźniaczym martenzycie, przy wysokiej ruchliwości atomów węgla. Maksimum P1 ujawnia się pod wpływem działania harmonicznie zmiennego zewnętrznego pola naprężeń przyłożonego do próbki w trakcie badań metodą spektroskopii mechanicznej.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3A; 2085-2091
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase features of several typical blood cells and their identification without unwrapping
    Autorzy:
    Wang, Y.
    Chen, Y
    Lü, C.
    Shang, X.
    Xu, Y.
    Wu, H.
    Zhu, X.
    Jin, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/173588.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    digital holographic phase
    nucleated cell
    phase model
    wrapped phase features
    identification
    Opis:
    The digital holographic phase microscopy (DHPM) technique which has been proposed for cellular morphology and dynamic analysis yielded highly desirable results. However, for nucleated cells (especially white blood cells (WBCs)), their submicroscopic structure has not yet been deconstructed through a phase unwrapping method due to the heterogeneity of an internal phase. By analyzing the phase heterogeneity of subclasses of WBCs, the typical phase models of them are built first in this paper; using the simulation method, the wrapped phase distributions of these models are obtained. However, by optimizing the wrapped phase maps and analyzing the relationships between them and typical blood cells, their features are selected and extracted. Then the models built are sorted out from each other successfully without unwrapping via analyzing these extracted features, which provides a valuable approach and technological base for the classification and identification of blood cells.
    Źródło:
    Optica Applicata; 2013, 43, 3; 505-514
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous measurement of refractive index and thickness for optically transparent object with a dual-wavelength quantitative technique
    Autorzy:
    Xu, X.
    Wang, Y.
    Xu, Y.
    Jin, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/174666.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    digital holography
    phase measurement
    cell measurement
    red blood cell
    Opis:
    We present a new dual-wavelength quantitative measurement approach that can be employed for simultaneously measuring both the refractive index and the thickness of the homogenous specimen. This method is realized by dual-wavelength in-line phase-shifting digital holography, and then the phase images are obtained by using four-phase step algorithm for each wavelength separately. Based on computer simulation technology, the feasibility and the effectiveness of our proposed method are demonstrated by comparing our simulation results with the experimental results of the spherical silica bead and the red blood cell, respectively. Our work will provide some guidance in the experimental research for transparent phase objects.
    Źródło:
    Optica Applicata; 2016, 46, 4; 597-605
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of spreading cultivation with food waste culture medium on the degradation of organophosphorus pesticides by a microbial consortium OP-1
    Autorzy:
    Zhang, Y.
    Jin, X.
    Luo, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/207212.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    microbial consortium
    DDVP
    food waste
    biodegradation
    odpady spożywcze
    pestycydy
    konsorcja drobnoustrojów
    odpady komunalne
    biodegradacja
    Opis:
    A microbial consortium OP-1 was enriched from a pesticide production plant and spread cultivated on various food waste (FW) culture media. Results indicated that OP-1 can efficiently degrade organophosphorus pesticides (OPs): isocarbophos, dimethoate and dichlorvos (DDVP). The microbial consortium obtained from the spreading cultivation using FW culture maintained certain degradation capacity of OPs. However, it was decreased after spreading cultivation, probably due to the change of microbial community structure. The finding of this study provided scientific supporting for the development of microbial degradation technique for the environmental remediation.
    Źródło:
    Environment Protection Engineering; 2016, 42, 4; 37-48
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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