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    Wyświetlanie 1-10 z 10
    Tytuł:
    A study on color vegetation canopy images denoising algorithm
    Autorzy:
    Wang, C.
    Liu, Y.
    Wang, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/199849.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    image denoising
    color vegetation canopy images
    adaptive mean filtering
    color space
    Opis:
    Due to the characteristics of color vegetation canopy images which have multiple details and Gaussion noise interference, the adaptive mean filtering (AMF) algorithm is used to perform the denoising experiments on noised images in RGB and YUV color space. Based on the single color characteristics of color vegetation canopy images, a simplified AMF algorithm is proposed in this paper to shorten the overall running time of the denoising algorithm by simplifying the adaptive denoising processing of the component V, which contains less image details. Experimental results show that this method can effectively reduce the running time of the algorithm while maintaining a good denoising effect.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 609-626
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Degradation of pulp mill wastewater by a heterogeneous Fenton-like catalyst Fe/Mn supported on zeolite
    Autorzy:
    Wang, Y.
    Shia, S.
    Wang, C.
    Fanga, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/207360.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    binary alloys
    efficiency
    effluentsiron alloys
    manganese alloys
    organic carbon
    stopy binarne
    wydajność
    zanieczyszczenia stopów żelaza
    stop manganowy
    węgiel organiczny
    Opis:
    A novel heterogeneous catalyst, Fe/Mn supported on NaY zeolite, was effectively applied for treating pulp mill effluents. The results of the wastewater quality analysis showed that aromatic structures were present in raw pulp mill effluents, which indicated the difficulty for biodegradation treatments. Two different catalysts were prepared by impregnation (Fe-Mn/NaYim) and sol-gel (Fe-Mn/NaYsg) methods, respectively. The Fe-Mn/NaYsg catalyst demonstrated higher COD removal efficiency and was more stable than the Fe-Mn/NaYim catalyst. The synergistic effects were found between Fe and Mn for COD removal. The highest COD removal efficiency (75.2%) was yielded with the Fe-Mn/NaYsg catalyst (Fe/Mn molar ratio of 2) with 4 mmol/dm3 of H2O2 and 1.2 g/dm3 of catalyst addition. A constant COD removal over time was obtained; the COD removal efficiency amounted to 45% after the Fe-Mn/NaYsg catalyst repeatedly degrading pulp mill effluents for five times. The distribution and transformation of the polarity and molecular weight (MW) of dissolved organic carbon (DOC) in the heterogeneous Fenton process were also studied. Experiments showed that the hydrophobic fraction comprised the largest fraction of DOC (60%) in raw wastewater and high MW molecules were transformed into low MW molecules after the heterogeneous Fenton process. This study broadened the application of the Fenton technology.
    Źródło:
    Environment Protection Engineering; 2018, 44, 2; 131-145
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The structure and properties of eucalyptus fiber/phenolic foam composites under N-β(aminoethyl)-γ-aminopropyl trimethoxy silane pretreatments
    Autorzy:
    Ma, Y.
    Wang, C.
    Chu, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/778793.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    eucalyptus fiber
    pheonlic foam
    N-β(aminoethyl)-γ-aminopropyl trimethoxy silane
    surface modification
    composites
    Opis:
    Eucalyptus fibers were modified with N-β(aminoethyl)-γ-aminopropyl trimethoxy silane to research the fiber surface’s changes and the influence of the treatment on the mechanical properties, flame resistance, thermal conductivity and microstructure of eucalyptus fiber composite phenolic foams (EFCPFs). The results showed that the partial of hemicelluloses, waxes, lignin and impurities from the fiber surface were dissolved and removed. Compared with untreated EFCPFs, the mechanical properties of treated EFCPFs were increased dramatically; The size of cells was smaller and the distribution was more uniform; The thermal conductivities were basically reduced; Especially the ratio of mass loss decreased obviously. However limited oxygen indexs (LOIs) reduced. And the mechanical properties and LOIs of EFCPFs were basically decreased with the increase of eucalyptus fibers. By comprehensive analysis, the results showed that the interfacial compatibility has been significantly improved between eucalyptus fibers and phenolic resin. And the suitable dosage of eucalyptus fibers was about 5%.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 4; 116-121
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Granule Shape on the Giant Magnetoresistance for Ferromagnetic Metal-Metal Granular Films
    Autorzy:
    Wang, C.
    Zhang, P.
    Zhang, Y.
    Rong, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/1814027.pdf
    Data publikacji:
    2007-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Gd
    75.47.-m
    75.50.-y
    Opis:
    In order to investigate the effect of granule shape on the giant magnetoresistance, assuming that granular films consist of ellipsoidal ferromagnetic granules embedded in a nonmagnetic metal matrix and the ellipsoidal granules have different demagnetizing factors in three directions, we combined two-current model with the effective medium theory to investigate the effect of granule shape on the giant magnetoresistance. The results revealed that the giant magnetoresistance in granular films depended strongly on the granule shape and was between those for current perpendicular to the plane of the layers and current in the plane of the layers in magnetic multilayers.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 6; 1231-1238
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Orchards on Eroded Uplands of Southeast China: Sustainability or Abandonment?
    Sady na zerodowanych wyżynach płd.-wsch. Chin: zrównoważoność czy problem?
    Autorzy:
    Wang, C.
    Yang, Y.
    Pang, W.
    Hong, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/371226.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Komitet Człowiek i Środowisko PAN
    Tematy:
    soil erosion
    rural livelihoods
    sustainability
    cost benefit analysis
    China
    erozja gleb
    poziom życia rolników
    zrównoważoność
    analiza kosztów i korzyści
    Chiny
    Opis:
    Orchard development on eroded uplands is considered as a successful method in integrating soil erosion treatment with economic development in many developing countries. However, much attention focused on its present achievements without thinking over the economic viability over long plantation duration. Orchards that have not been intensified seem to be threatened by complete abandonment. To illustrate the economic viability and sustain-ability of orchard management, we have deliberately focused on a case study in Southeast China. The results of economic viability based on a cost-benefit analysis showed that orchard management was barely economically sustainable. Their viability is assured if reduced labor costs and increased fruit price are accepted. Based on these results, recommendations are made to prevent the abandonment of orchards on degraded uplands and to preserve its environmental benefits.
    Tworzenie sadów na zerodowanych wyżynach w wielu krajach rozwijających się jest traktowane jako metoda udanie łączącą zintegrowane przeciwdziałanie erozji gleb z rozwojem ekonomicznym. Niestety, zbyt mocno podkreśla się znacznie szybkich osiągnięć, bez rozważania kontekstu wieloletniej opłacalności takich działań. Sady, których nie poddano modyfikacjom, opuszczono. By zilustrować ekonomiczną sensowność i zrównoważoność zarządzania sadami, wybrano jako case study obszar płd.-wsch. Chin. Rezultaty oceny opartej na analizie kosztów i korzyści wykazały, że zarządzanie sadami okazuje się być słabo ekonomicznie zrównoważone. Opłacalność zostałaby zapewniona w przypadku obniżenia kosztów pracy i podniesienia cen owoców. Na podstawie przeprowadzonych badań przedstawiono rekomendacje, których uwzględnienie umożliwiłoby zaprzestanie procederu rezygnacji z prowadzenia sadów na terenach zdegradowanych wyżyn i utrzymanie korzyści środowiskowych.
    Źródło:
    Problemy Ekorozwoju; 2016, 11, 2; 37-43
    1895-6912
    Pojawia się w:
    Problemy Ekorozwoju
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of recent coastline evolution due to marine reclamation projects in the Qinzhou Bay
    Autorzy:
    Yan, Y.
    Zhang, Z.
    Wang, C.
    Zhang, L.
    Huang, Y.
    Zhang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/258862.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Qinzhou Bay
    marine reclamation
    remote sensing
    geospatial analysis
    coastline evolution
    Opis:
    Intense marine reclamation activities bring obvious benefits, meanwhile, these activities also influence the coastal natural formation, hydrodynamic processes and water environment etc. In order to investigate the exact influence in the Qinzhou Bay brought by marine reclamation behaviors in recent years, based on the remote sensing image data in the Qinzhou Bay in 2006, 2008, 2009, 2012 and 2014, with the help of GIS and RS software, the thesis interprets Qinzhou Bay coastline and artificial reclamation by man-machine interaction and makes quantitative analysis in the Qinzhou Bay coast evolution recently. The results show: (1) Qinzhou Bay coastal morphology change degree was strong in 2006 - 2012 and the coastline changed greatly. Originally part of the natural shore segments which had twists and turns were gradually filled into artificial coast, the coast constantly advanced to the sea, coastline became regular and straight; (2) The change degree of coastline was relatively small in 2006-2008, the average artificial coastline increased 8.86 km/a, the average artificial reclamation area was 20.79 km2 /a; in 2008-2012, the change range of coastline was the greatest, coastline changed most severely, the average artificial coastline increased 16.07 km/a, the average artificial reclamation area was 58.52 km2 /a; however, in 2012-2014, coastline change degree relatively slowed, the average artificial coastline increased 4.04 km per year, the average artificial reclamation area was 3.464 km2 /a. (3) Compared to the studies of predecessors, the innovation of this paper is that it is the first to carry out the detailed research on coastline evolution caused by reclamation engineerings of the Qinzhou Bay, then formed the change results on coastline that caused by intense human activities in the Qinzhou Bay, provided the area of the marine environment protection with full and accurate data.
    Źródło:
    Polish Maritime Research; 2017, S 2; 188-194
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of nitrogen addition on growth and photosynthetic characteristics of Acer truncatum seedlings
    Autorzy:
    Guo, X.
    Wang, R.
    Chang, R.
    Liang, X.
    Wang, C.
    Luo, Y.
    Yuan, Y.
    Guo, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/41162.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    nitrogen addition
    plant growth
    photosynthesis
    Acer truncatum
    tree
    plant morphology
    carbon assimilation
    chlorophyll fluorescence
    seedling
    Opis:
    Increasing levels of atmospheric nitrogen deposition have greatly affected forest trees. Acer truncatum Bunge has a large distribution in northern China, Korea and Japan and plays an important ecological role in forest ecosystems. We investigated the responses of A. truncatum to a broad range of nitrogen addition regimes with a focus on seedling growth, biomass partitioning, leaf morphology, gas exchange physiology and chlorophyll fluorescence physiology. Moderate nitrogen addition promoted shoot height, stem diameter at ground height, total biomass, size of leaves and chlorophyll fluorescence and gas exchange performance, whereas extreme level of nitrogen addition did not result in such facilitation. Chlorophyll content, pattern of biomass partitioning, ratio of leaf length to width, leaf water content, and specific leaf area did not change among the addition regimes. The critical amount of nitrogen deposition should be defined in the context of a certain time period in a particular region for a certain species at a special developmental stage. The critical amount of N deposition that weakens total biomass facilitation in A. truncatum planted in mixed soil of yellow cinnamon soil and humic soil is approximately 10 g N m−2 y−1 during the first growing season.
    Źródło:
    Dendrobiology; 2014, 72
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel DOPO-g-KH550 modification wood fibers and its effects on the properties of composite phenolic foams
    Autorzy:
    Ma, Y.
    Geng, X.
    Zhang, X.
    Wang, C.
    Chu, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/949373.pdf
    Data publikacji:
    2018
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    DOPO
    Wood Fiber
    Γ-amino propyl triethoxy silane
    Composites
    Characterization
    Opis:
    A novel 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) graft γ-amino propyl triethoxy silane (KH550) was synthesized and introduced on the surface of wood fi ber. Finally DOPO-g-KH550 treated wood fi ber (DKTWF) was used to prepare DKTWF composite phenolic foams (DKTWFCPF). The structures of DOPO-g- KH550 was acknowledged by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (1 H-NMR). The structures of DKTWF were confirmed by FT-IR. Compared with wood fi ber, the diffraction peaks’ position was basically unchanged, but the crystallinity was slightly increased and thermal stability were dramatically improved, T5%  and Tmax  increased by 21.9° and 36.1° respectively. But the char yield (800°) was slightly reduced. With the dosage of DKWF, there were different degrees of improvement including the mechanical properties, flame retardancy and microstructure of DKTWFCPF. Comprehensive analysis, the interfacial compatibility was signifi cantly improved between DKTWF and phenolic resin, and the suitable content of DKTWF was 4%.
    Źródło:
    Polish Journal of Chemical Technology; 2018, 20, 2; 47-53
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary results of spatial distribution of uranium and thorium in soil profi les near a uranium industrial site, Guangdong province, China
    Autorzy:
    Wang, J.
    Liu, J.
    Chen, Y.
    Song, G.
    Chen, D.
    Xiao, T.
    Li, H.
    Wang, C.
    Jiang, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/146530.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    spatial distribution
    thorium
    uranium
    U/Th ratio
    Opis:
    Four soil profiles were collected from locations with different distances (5, 50, 250 and 1000 m) from a uranium mill tailings dam, Guangdong province, China, to investigate the pollution status of the soil in mining/ milling-related areas based on the contents of uranium (U) and thorium (Th), thus to understand the impacts of uranium industrial activities to the surroundings. The U and Th concentrations were determined by inductively coupled plasma mass spectrometry (ICP-MS) after conventional HF-HNO3-HClO4 digestion procedures. The results indicate that the soils within 50 m from uranium tailing were severely contaminated; those in 250 and 1000 m soil samples were observed to be with local background level even though these in 250 m had slightly higher U/Th ratios. Uranium concentrations varied from 5.50 ± 0.27 to 160.55 ± 8.03 mg/kg, with maximum values recorded in an intermediate layer of the 5-m distance soil profile. In comparison, the concentration of Th ranged from 6.02 ± 0.30 to 84.71 ± 4.24 mg/kg, with maximum values observed in the top layer of the 1000-m distance soil profile. The U/Th ratio varied from 0.15 to 11.99 compared with 0.20, 0.22 and 0.26 of the average for Guangdong province, national China and the world, respectively. The mean U/Th of four soil profiles showed a reduction with distance from the uranium mill tailing dam, suggesting the relatively large magnitude of uranium elevation in soils within limited distances.
    Źródło:
    Nukleonika; 2016, 61, 3; 367-371
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Serological and molecular evidence of Coxiella burnetii in samples from humans and animals in China
    Autorzy:
    El-Mahallawy, H.S.
    Kelly, P.
    Zhang, J.
    Yang, Y.
    Wei, L.
    Tian, L.
    Fan, W.
    Zhang, Z.
    Wang, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/49293.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2016, 23, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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