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    Wyświetlanie 1-13 z 13
    Tytuł:
    Pyrite oxidation inhibition by hydrophobic films for acid mine drainage control at the source
    Autorzy:
    Wang, Shuncai
    Zhao, Yue
    Li, Shuang
    Powiązania:
    https://bibliotekanauki.pl/articles/110200.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hydrophobic film
    pyrite
    suppression
    linoleic acid
    acid mine drainage
    Opis:
    Acid mine drainage (AMD), which is also known as acid rock drainage (ARD), can cause serious environmental pollution, especially for surrounding aquatic and terrestrial ecosystems due toits low pH, high metal and sulfate concentration. Acid mine drainage is an urgent environmental problem for the worldwide ore mining industry. In this paper, we demonstrated that hydrophobic films can inhibit the oxidation of pyrite-bearing tailings to achieve the control of at-source AMD. The results of chemical leaching testing showed that the hydrophobic films formed by linoleic acid can suppress the oxidation of pyrite-bearing tailings and reduce the AMD production. In addition, the presence of hydrophobic films of linoleic acid on the surface of pyrite-bearing tailings was confirmed by the results from Fourier transform infrared (FTIR) analyses and scanning electron microscopy with energy dispersive spectrometry (SEM / EDS).
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1132-1140
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of probiotic intervention in regulating gut microbiota, short-chain fatty acids and depression-like behavior in lead-exposed rats
    Autorzy:
    Chen, Xiaojun
    Meng, Shujuan
    Yu, Yongli
    Li, Shuang
    Wu, Lei
    Zhang, Yanshu
    Powiązania:
    https://bibliotekanauki.pl/articles/2085714.pdf
    Data publikacji:
    2022-02-15
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    depression
    lead exposure
    probiotic
    gut microbiota
    SCFAs
    neurobehavioral tests
    Opis:
    ObjectivesThe aim of this study was to observe the depression-like behavior changes of rats exposed to lead with or without probiotic intervention, and to investigate changes in the gut microbiota and fecal short-chain fatty acids (SCFAs) levels after lead exposure, and the possible functions of probiotics in this process.Material and MethodsAdult male Sprague Dawley rats were exposed to a 300 mg/l lead acetate solution for 24 weeks, with or without probiotic (freeze-dried powder containing Lactobacillus and Bifidobacterium: 6 billion live bacteria/2 g) intervention in weeks 17–24. The sucrose preference test (SPT), the forced swim test (FST), and the tail suspension test (TST) were preformed to study the depression-like behaviors of these rats. The alteration of rat gut microbiota induced by lead exposure was analyzed by 16S rRNA sequencing, and the levels of fecal SCFAs were detected using gas chromatography.ResultsNeurobehavioral tests showed that lead exposure induced depression-like behavior in rats, including reduced sucrose preference in the SPT, and increased immobility times in the FST and the TST. Sequencing and gas chromatography showed that lead exposure changed the structure and the phylogenetic diversity of the gut microbiota, as well as significantly altered the levels of SCFAs. Moreover, the depression-like behaviors, and the changes in both gut microbiota and SCFAs, could be mitigated by probiotic intervention.ConclusionsLead exposure not only changes the structure and diversity of the gut microbiome but also affects metabolic function. Probiotic intervention may be a novel initiative for the prevention and treatment of neurological damage following lead exposure. Health. 2022;35(1):95–106
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2022, 35, 1; 95-106
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Ammonium Perchlorate-based Molecular Perovskite (H2DABCO)[NH4(ClO4)3]/Graphene Energetic Composite with Insensitive Performance
    Autorzy:
    Liu, Yang
    Hu, Li-shuang
    Gong, Shida
    Guang, Chunyu
    Li, Lianqiang
    Hu, Shuangqi
    Deng, Peng
    Powiązania:
    https://bibliotekanauki.pl/articles/1063027.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ammonium perchlorate
    molecular perovskite
    graphene
    energetic composites
    composite desensitization
    Opis:
    In order to improve the safety properties of molecular perovskite energetic materials, ammonium perchlorate-based molecular perovskite ((H2DABCO)[NH4(ClO4)3], DAP)/graphene composite was prepared and characterized. Molecular perovskite DAP was prepared via a molecular assembly strategy by the facile one-pot reaction of triethylenediamine (TEDA, DABCO), perchloric acid, and ammonium perchlorate, and the DAP/graphene composite was fabricated by mechanical mixing with 10 wt.% graphene. The results demonstrated that impact sensitivity (>120 cm), friction sensitivity (25%) and electrostatic spark sensitivity (7.04 J) of the DAP/graphene composite was less sensitive than raw DAP (impact, friction and electrostatic spark sensitivity: 112.3 cm, 45%, and 5.39 J, respectively), due to the composite desensitization mechanism of graphene. This work may offer new ideas for the design and fabrication of insensitive molecular perovskite-based energetic composites.
    Źródło:
    Central European Journal of Energetic Materials; 2020, 17, 3; 451-469
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exposure to particulate matter 2.5 leading to lung microbiome disorder and the alleviation effect of Auricularia auricular-judae polysaccharide
    Autorzy:
    Zhang, Yanshu
    He, Bin
    Wu, Lei
    Mi, Xiaoyi
    Zhang, Lijin
    Li, Shuang
    Wang, Jian
    Yu, Xiaoyu
    Powiązania:
    https://bibliotekanauki.pl/articles/2152971.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    PM 2.5
    inflammatory damage
    lung injury
    BALF
    microbiome disorder
    AAP
    Opis:
    Objectives The aim of the paper is to explore the role of lung microbiome disorder in lung tissue injury induced by exposure to particulate matter with a maximum diameter of 2.5 μm (PM2.5) and the alleviation effect of auricularia auricular-judae polysaccharide (AAP). Material and Methods Sprague Dawley rats were given PM2.5 suspension at a dose of 20 mg/l twice a week for 8 weeks. Then, 100 mg/kg or 200 mg/kg of AAP was administered to the rats after PM2.5 exposure. The bronchoalveolar lavage fluid (BALF) and lung tissue samples were collected at the end of the experiment. The BALF was meant to detect changes in lung microbiome by 16S sequences and cluster analysis, with the application of the principal component analysis and the partial least squares discriminant analysis. The levels of interferon-γ (IFN-γ), and interleukin (IL)-4, IL-8, and IL-10 in lung tissue were detected by the enzyme-linked immunosorbent assay method. The pathological changes in lung tissue were observed by hematoxylin and eosin staining. Results After PM2.5 exposure, the alveolar septum was widened, and the structures of alveolar walls were destroyed. There was inflammatory cells infiltration in the alveolar space and the interstitial space. Alpha diversity in BALF showed that the Chao1, ACE, Simpson, and Shannon values were increased, and the lung microbiome analysis revealed that the relative abundance of Firmicutes and Clostridium increased, while the relative abundance of Bacteroidetes and Akkermansia decreased. The contents of IFN-γ and IL-8 in lung tissue increased while the content of IL-10 decreased. After the administration of AAP, the alveolar structure damage was alleviated, and the interstitial hemorrhage, edema, and inflammatory cells infiltration were reduced. The Chao1 and ACE values decreased, and the taxonomic abundance values of Akkermansia were much higher. Simultaneously, the contents of IFN-γ, IL-4, and IL-8 decreased, and the content of IL-10 increased. Conclusions It was found that PM2.5 resulted in lung microbiome disorder, which might lead to the inflammation of lung tissue. It was also revealed that AAP could alleviate the inflammatory damage of lung tissue induced by PM2.5.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2022, 35, 6; 651-664
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Molecular Perovskite (H2dabco)[NH4(ClO4)3]/Carbon Nanotubes Energetic Composite
    Autorzy:
    Hu, Li-shuang
    Liu, Yang
    He, Dan
    Yang, Yajun
    Gong, Shida
    Guang, Chunyu
    Deng, Peng
    Hu, Shuangqi
    Powiązania:
    https://bibliotekanauki.pl/articles/27788083.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ammonium perchlorate
    (H2dabco)[NH4(ClO4)3]
    carbon nanotubes
    mechanical sensitivity
    thermal stability
    Opis:
    An ammonium perchlorate (AP, NH4(ClO4)3)-based molecular perovskite energetic material (H2dabco)[NH4(ClO4)3]/carbon nanotubes (DAP/CNTs) composite was prepared and characterized. Molecular perovskite DAP samples were synthesized by a facile one-pot reaction of triethylenediamine, perchloric acid (PCA, HClO4), and AP via a molecular assembly strategy. The results showed that the mechanical sensitivity (impact and friction sensitivities: >120 cm and 20%) and electrostatic spark sensitivity (8.90 J) of the DAP/CNTs energetic composite with 10 wt.% CNTs exhibited less sensitivity than that of DAP (impact, friction and electrostatic spark sensitivities: 112.3 cm, 45%, and 5.39 J, respectively), because of the mixing desensitization mechanism of CNTs. Compared with the pure DAP, the DAP/CNTs energetic composite has better performance with respect to thermal stability, exothermic capacity, and excellent continuous combustion properties. The DAP/CNTs energetic composite has potential application in a weapons system.
    Źródło:
    Central European Journal of Energetic Materials; 2022, 19, 1; 91--105
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Green Fabrication of Nanoscale Energetic Molecular Perovskite (H2dabco)[Na(ClO4)3] with Reduced Mechanical Sensitivity
    Autorzy:
    Hu, Li-shuang
    Du, Zelin
    Liu, Yang
    Gong, Shida
    Guang, Chunyu
    Li, Xin
    Yang, Zhi
    Jia, Qi
    Liang, Kaili
    Powiązania:
    https://bibliotekanauki.pl/articles/27787996.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    molecular perovskite
    (H2dabco)[Na(ClO4)3]
    ball milling
    thermal decomposition
    mechanical sensitivity
    Opis:
    High-energy-density molecular perovskite energetic materials with high detonation performance have attracted much attention, but poor safety performance has limited their potential applications. In this paper, nano sodium perchlorate-based molecular perovskite (H2dabco)[Na(ClO4)3] (nano DAP-1) was fabricated by green ball-milling technology. The structure and morphology of the samples were characterized and the results showed that nano DAP-1 with nearly spherical morphology has a narrow particle size distribution, < 1 μm. The thermal decomposition properties were investigated by differential scanning calorimetry (DSC). The exothermic peak of nano DAP-1 thermal decomposition was 330.0 °C, a decrease of 51.7 °C compared with that of raw DAP (381.7 °C). The apparent activation energy (Ea) of nano DAP-1 was calculated to be 160.9 kJ·mol–1, which is lower than that of raw DAP-1 (168.6 kJ·mol–1). Mechanical sensitivity studies showed that nano DAP-1 (H50: 64 cm) exhibited a lower impact sensitivity than that of the raw DAP-1 (H50: 51 cm). This work provides a simple and effective way for improving the thermal decomposition properties and safety performance of molecular perovskite energetic materials.
    Źródło:
    Central European Journal of Energetic Materials; 2021, 18, 3; 369--384
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transverse energy propagation and interference of elliptical Gaussian beams
    Autorzy:
    Li, Jin
    Tan, Shuang-Cheng
    Powiązania:
    https://bibliotekanauki.pl/articles/27310096.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    elliptical Gaussian beam
    transverse energy flux
    interference of EGBs
    Opis:
    Elliptical Gaussian beam (EGB) has many different physical properties from circular Gaussian beam. In this paper, the transverse energy flux and intensity of one and two coherent EGBs are studied. In our simulation, the transverse energy flux and intensity varying with waist ratio are discussed in detail. It has been found that through increasing the waist ratio, the transverse energy flux after interference would be strengthened significantly. Although the transverse energy flux is much weaker than the longitudinal energy flux, its signal to noise ratio has been verified to be strong enough for detection. Our derivations are still reasonable for another simulation with general experimental parameters. The simulation results are considered to be helpful for some physical experiments using the transverse energy flux of Gaussian beam, such as an important application in electromagnetic response produced by interaction of high-frequency gravitational waves.
    Źródło:
    Optica Applicata; 2023, 53, 2; 249--260
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Temperature on the Properties of Cellulose Iβ based on Molecular Dynamics Simulations
    Autorzy:
    Huang, Shuang
    Wu, Xin
    Li, Peixing
    Powiązania:
    https://bibliotekanauki.pl/articles/2056296.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    cellulose Iβ
    molecular dynamics simulation
    Mulliken population
    movement of chain
    hydrogen bond
    Opis:
    Natural plants, such as cotton and linen, are rich in cellulose Iβ. The properties of cellulose Iβ under different temperatures was studied using molecular dynamics simulations. Firstly, the crystal of cellulose Iβ was built. To verify the model, the X-ray fibre diffraction and thermal expansion coefficients were calculated, which were found to agree with experimental results. Then the Mulliken population of the bonds were computed and the movement of the centre chain and hydrogen bonds studied over the range 300-550 K using a PCFF force field. The results of the Mulliken population reveal the three steps of pyrolysis. The higher the temperature is, the more intensely the movement of the centre chain is. However, the impact of temperature on the movement of the centre chain is not obvious. From 300 K to 550 K, the total number of hydrogen bonds decreased by only 20%. Moreocer, the rupture of intrachain hydrogen bonds and the formation of interchain hydrogen bonds at 400 K~450 K temperature occurred.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2021, 6 (150); 32--36
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on characteristics of embedded resonator sensor based on PtS2
    Autorzy:
    Li, Xin
    Li, Xieyuan
    Zhang, Haitao
    Chen, Shuang
    Liu, Shurong
    Li, Yang
    Powiązania:
    https://bibliotekanauki.pl/articles/27310092.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    embedded
    microring resonator
    U-shaped feedback waveguide
    PtS2 core layer
    Opis:
    An embedded microring resonator model using PtS2 as the core layer was designed and optimized for sensing. The inner layer is made of PtS2, and SiO2 and Si3N4 are used as cladding. The overall structure is Si3N4-SiO2-PtS2-SiO2-Si3N4. Field strength distribution of longitudinal section of single straight waveguide and the longitudinal section of coupling part of straight and annular waveguides are simulated according to the coupled-mode theory. The transfer matrix method is used to analyze characteristics between the length of the U-shaped feedback waveguide and the circumference of microring and the change of attenuation factor and coupling coefficient on the output spectrum. The simulation results showed that the embedded microring resonator with PtS2 as the core presents excellent optical properties. The resonance depth is more than –50 dB, and the sensitivity can reach 1806.61 dB/RIU. When the resonance wavelength is 1550.86 nm and the self-coupling coefficient is 0.9849. The corresponding detection limit is about 1.66056×10–7 dB/RIU, and the quality factor is 2.8848×10–5 under the measurement system with a signal-to-noise ratio of 30 dB. Compared with the traditional single microring structure, the proposed microring presents a higher free spectral range and more suitable for the fabrication of high-sensitivity, low-detection limit, and large-measurement range sensors.
    Źródło:
    Optica Applicata; 2023, 53, 2; 213--226
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on the influence of particle size on the identification accuracy of coal and gangue
    Badanie wpływu wielkości cząstek na dokładność identyfikacji węgla i skały płonnej
    Autorzy:
    Li, Xin
    Wang, Shuang
    He, Lei
    Luo, Qisheng
    Powiązania:
    https://bibliotekanauki.pl/articles/2203300.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    particle size
    gray feature
    texture feature
    support vector machine
    coal identification
    gangue identification
    wielkość cząstek
    cecha szarości
    cecha tekstury
    maszyna wektorów pomocniczych
    identyfikacja węgla
    identyfikacja skały płonnej
    Opis:
    In order to explore the impact of coal and gangue particle size changes on recognition accuracy and to improve the single particle size of coal and gangue identification accuracy of sorting equipment, this study established a database of different particle sizes of coal and gangue through image gray and texture feature extraction, using a relief feature selection algorithm to compare different particle size of coal and gangue optimal features of the combination, and to identify the points and particle size of coal and gangue. The results show that the optimal features and number of coal and gangue are different with different particle sizes. Based on visible-light coal and gangue separation technology, the change of coal and gangue particle size cause fluctuations in the recognition accuracy, and the fluctuation of recognition accuracy will gradually decrease with increases in the number of features. In the process of particle size classification, if the training model has a single particle size range, the recognition accuracy of each particle size range is low, with the highest recognition accuracy being 98% and the average recognition rate being only 97.2%. The method proposed in this paper can effectively improve the recognition accuracy of each particle size range. The maximum recognition accuracy is 100%, the maximum increase is 4%, and the average recognition accuracy is 99.2%. Therefore, this method has a high practical application value for the separation of coal and gangue with single particle size.
    W celu zbadania wpływu zmian wielkości cząstek węgla i skały płonnej na dokładność rozpoznawania oraz poprawienia dokładności identyfikacji pojedynczych cząstek węgla i skały płonnej przez urządzenia sortujące, w ramach tej pracy utworzono bazę danych różnych rozmiarów cząstek węgla i skały płonnej za pomocą obrazów szarych i ekstrakcję cech tekstury przy użyciu algorytmu wyboru cech reliefowych w celu porównania różnych rozmiarów cząstek węgla i skały płonnej przy optymalnych cechach kombinacji oraz identyfikacji punktów i wielkości cząstek węgla i skały płonnej. Wyniki pokazują, że optymalne liczby cech węgla i skały płonnej są różne dla różnych rozmiarów cząstek. W oparciu o technologię separacji węgla i skały płonnej w świetle widzialnym, zmiana wielkości cząstek węgla i skały płonnej powoduje fluktuacje dokładności rozpoznawania, a te z kolei będą stopniowo zmniejszać się wraz ze wzrostem liczby cech. W procesie klasyfikacji wielkości cząstek, jeśli model uczący ma jeden zakres wielkości cząstek, dokładność rozpoznawania każdego zakresu wielkości cząstek jest niska, przy czym najwyższa dokładność rozpoznawania wynosi 98%, a średni wskaźnik rozpoznawania wynosi tylko 97,2%. Metoda zaproponowana w tym artykule może skutecznie poprawić dokładność rozpoznawania każdego zakresu wielkości cząstek. Maksymalna dokładność rozpoznawania wynosi 100%, maksymalny wzrost to 4%, a średnia dokładność rozpoznawania to 99,2%. Dlatego ta metoda ma dużą praktyczną wartość użytkową do oddzielania węgla i skały płonnej według rozmiaru pojedynczej cząstki.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2023, 39, 1; 109--129
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Coal Gangue Detection and Recognition Based on Lightweight Network MS-YOLOV3
    Badania nad wykrywaniem i rozpoznawaniem skały płonnej w oparciu o lekką sieć MS -YOLOV3
    Autorzy:
    Li, Deyong
    Wang, Guofa
    Wang, Shuang
    Wang, Wenshan
    Du, Ming
    Powiązania:
    https://bibliotekanauki.pl/articles/2173813.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    coal gangue
    MobileNetV2
    spatial pyramid pooling
    SPP
    YOLOv3
    skała płonna
    Opis:
    The rapid and accurate detection and identification of coal gangue is one of the premises and key technologies of the intelligent separation of coal gangue, which is of considerable importance for the separation of coal gangue. Focusing on the problems in the current deep learning algorithms for the detection and recognition of coal gangue, such as large model memory and slow detection speed, a rapid detection method for lightweight coal gangue is proposed. YOLOv3 is taken as the basic structure and improved. The MobileNetv2 lightweight feature extraction network is selected to replace Darknet53 as the main network of the detection algorithm to improve the detection speed. Spatial pyramid pooling (SPP) is added after the backbone network to convert different feature maps into fixed feature maps in order to improve the positioning accuracy and detection capability of the algorithm, thereby obtaining the lightweight network MS-YOLOV3. The experimental equipment was set up and multi-condition coal and gangue datasets were constructed. The model was trained and the identification and positioning results of the model were tested under different sizes, illumination intensities and various working conditions, and compared with other algorithms. Experimental results show that the proposed algorithm can detect the coal gangue quickly and accurately, with an mAP of 99.08%, a speed of 139 fps and a memory occupation of only 9.2 M. In addition, the algorithm can effectively detect mutually stacking coal and gangue of different quantities and sizes under different lights with high confidence and with a certain degree of environmental robustness and practicability. Compared with the YOLOv3, the performance of the proposed algorithm is significantly improved. Under the premise that the accuracy is unchanged, the FPS increases by 127.9% and the memory decreases by 96.2%. Therefore, the MS-YOLOv3 algorithm has the advantages of small memory, high accuracy and fast speed, which can provide online technical support for the detection and identification of coal and gangue.
    Szybkie i dokładne wykrywanie oraz identyfikacja skały płonnej jest jedną z przesłanek i kluczowych technologii inteligentnej separacji skały płonnej. Koncentrując się na problemach związanych z obecnymi algorytmami wykrywania i rozpoznawania skały płonnej z głębokim uczeniem, takimi jak duża pamięć modelu i niska prędkość wykrywania, zaproponowano metodę szybkiego wykrywania lekkiej skały płonnej. YOLOv3 jest traktowany jako struktura podstawowa i ulepszony. Lekka sieć ekstrakcji funkcji Mobilenetv2 została wybrana w celu zastąpienia Darknet53 jako głównej sieci algorytmu wykrywania w celu poprawy szybkości wykrywania. Spatial Pyramid Pooling (SPP) jest dodawany po sieci szkieletowej w celu konwersji różnych map obiektów na mapy stałych funkcji, aby poprawić dokładność pozycjonowania i zdolność wykrywania algorytmu, uzyskując w ten sposób lekką sieć MS-YOLOV3. Ustawiono sprzęt eksperymentalny i skonstruowano wielowarunkowe zbiory danych dotyczące węgla i skały płonnej. Model został przeszkolony, a wyniki identyfikacji i pozycjonowania modelu zostały przetestowane przy różnych rozmiarach, natężeniu oświetlenia i różnych warunkach pracy oraz porównane z innymi algorytmami. Wyniki eksperymentu pokazują, że zaproponowany algorytm jest w stanie szybko i dokładnie wykryć skałę węglową, z mAP na poziomie 99,08%, szybkością 139 fps i zajęciem pamięci zaledwie 9,2 MB. Ponadto może skutecznie wykrywać różne światła, różne rozmiary, wzajemne układanie w stosy oraz wielokrotną ilość węgla i skały płonnej, z dużą pewnością i pewną odpornością środowiskową i wykonalnością. W porównaniu z YOLOv3 wydajność proponowanego algorytmu jest znacznie lepsza. Przy założeniu, że dokładność pozostaje w zasadzie niezmieniona, FPS wzrasta o 127,9%, a pamięć spada o 96,2%. Dlatego algorytm MS-YOLOv3 ma zalety małej pamięci, wysokiej dokładności i dużej szybkości, co może zapewnić wsparcie techniczne dla wykrywania i identyfikacji węgla i skały płonnej online.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2022, 38, 4; 133--152
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facile synthesis and characterization of zinc tetranitro phthalocyanine-MWCNTs nanocomposites with efficient visible-light-driven photocatalytic activity
    Autorzy:
    Wan, Yi
    Chen, Shuang
    Wang, Guanqiu
    Liang, Qian
    Li, Zhongyu
    Xu, Song
    Powiązania:
    https://bibliotekanauki.pl/articles/1158623.pdf
    Data publikacji:
    2016-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.67.Bf
    81.05.Zx
    81.07.Pr
    Opis:
    Novel zinc tetranitro-phthalocyanine (ZnTNPc) supported by multi-walled carbon nanotubes hybrid composites were facilely prepared by a method of ultrasonic impregnation and their photocatalysis behavior was studied. The as-prepared ZnTNPc-MWCNTs composites were characterized by scanning electron microscopy, X-ray diffraction, diffuse reflectance spectra, transmission electron microscopy, thermogravimetric analysis, and the Fourier transform infrared spectra. The results showed that the ZnTNPc was not only grown on the multi-walled carbon nanotubes but also uniformly disturbed without aggregation. Compared with pure ZnTNPc and MWCNTs, ZnTNPc-MWCNTs nanocomposites presented a significantly enhanced photocatalytic activity for the degradation of rhodamine B under visible-light irradiation. Furthermore, a possible mechanism for the photodegradation of rhodamine B was also proposed.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 3; 785-790
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Newly identified transcripts of UL4 and UL5 genes of human cytomegalovirus
    Autorzy:
    Gao, Shuang
    Ruan, Shan
    Ma, Yanping
    Li, Mali
    Wang, Lin
    Zheng, Bo
    Qi, Ying
    Sun, Zhengrong
    Huang, Yujing
    Ruan, Qiang
    Powiązania:
    https://bibliotekanauki.pl/articles/1039141.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    HCMV
    UL4
    UL5
    transcript
    Opis:
    Human cytomegalovirus (HCMV) UL4 and UL5 genes are two members of the RL11 gene family. In an earlier study, three UL4 transcripts of about 1.7, 1.5 and 1.4 kb were found in early and late classes after infection by the Towne strain by nuclease protection and primer extension analyses. In the present study, two UL4 transcripts (1.5 and 1.7 kb) were found by cDNA library screening, Northern blot, 3' and 5' RACE analyses to appear initially in the immediate early phase and one UL4 transcript (1.4 kb) in the late phase in a low-passage clinical isolate. Furthermore, two novel low-abundance UL5 transcripts with the same 3' terminus as the identified UL4 transcripts in the UL4-UL5 gene region were found in late class RNAs.
    Źródło:
    Acta Biochimica Polonica; 2015, 62, 1; 97-101
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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