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Wyszukujesz frazę "Zhao, Bo" wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Analysis of the Influencing Factors of the Acoustic Performance of the Muffler Considering Acoustic-structural Coupling
    Autorzy:
    Zhao, Bo
    Li, He
    Powiązania:
    https://bibliotekanauki.pl/articles/31339942.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    acoustic performance
    muffler
    acoustic-structural coupling
    transmission loss
    mode
    optimisation
    Opis:
    In the calculation of the acoustic performance of mufflers, the walls of mufflers are usually treated rigidly without considering the acoustic-structural coupling, but the results so calculated differ significantly from the actual situation. Based on the basic equations, the article derives the finite element equations of the muffler system while considering the acoustic-structural coupling effect and theoretically analyses the connection between the acoustic-structural coupling system and the structural and acoustic modes. The structural and acoustic modes of the muffler are calculated and the reasons for the mutation of the transmission loss curve of the muffler when the acoustic-structural coupling is considered are analysed. The results show that the acoustic-structural coupling is the result of the interaction between the structure and the air inside the expansion chamber under acoustic excitation, which manifests mutations in the sound pressure inside the muffler in some frequency bands. Then, using a single-chamber muffler as an example, the transmission loss is used to characterise the performance of the muffler. The effects of different factors such as shell thickness, structure, porous media material lining, and restraint method on the acoustic-structural coupling effect of the muffler are analysed, and the structure of a double-chamber muffler is successfully optimised according to the conclusions.
    Źródło:
    Archives of Acoustics; 2022, 47, 4; 479-490
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A modified Fourier-Ritz method for free vibration of rectangular plates with elastic constrains
    Autorzy:
    Wu, Tao
    Chen, Zhao Bo
    Qu, Jian Jun
    Powiązania:
    https://bibliotekanauki.pl/articles/2086961.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    modified Fourier-Ritz method
    rectangular plate
    free vibration
    boundary conditions
    Opis:
    In this paper, a modified Fourier-Ritz method is used to study free vibration of a rectangular plate with a set of simply supported opposite sides and another set of arbitrary elastic constraints. The influence of different elastic constraint stiffness values on the modal response of the rectangular plate is also analyzed. In order to avoid that the displacement function of the rectangular plate calculated by the traditional method and its derivative may be discontinuous or non-derivable at the boundary, the displacement function is expressed in the form of the sum of standard cosine series and a periodic polynomial function. Compared with the sine series expansion, the convergence of the result is enhanced. Several sets of numerical examples with different boundary conditions are given in the article, the data shows that the results calculated by this method have good accuracy and fast convergence. In addition, this paper also analyzes the boundary conditions and discusses the influence of different spring stiffness values on the setting of boundary conditions. The results can be applied to the setting of general boundary conditions and the study of vibration control of rectangular plates.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 1; 77--89
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fluidization characteristics and separation performance of mild-hot gas-solid fluidized bed
    Autorzy:
    Lv, Bo
    Luo, Zhenfu
    Zhang, Bo
    Zhao, Yuemin
    Qin, Yunfei
    Powiązania:
    https://bibliotekanauki.pl/articles/109724.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    dry coal separation
    mild-hot gas-solid fluidized bed
    bed temperature
    fluidization characteristics
    Opis:
    In recent years, the mild-hot gas-solid fluidized bed had a crucial influence on wet-in-feed sorting when it comes to moist feed (e.g., lignite) because of its expanding sorting range. To explain the favorable sorting effect of the mild-hot gas-solid fluidized bed, the fluidization characteristics (e.g., the pressure drop, density, etc.) was studied under different work conditions. In addition, a high-speed dynamic camera was used in this study to compare the slumping behavior of the magnetite slag at different temperatures. The optimum conditions for coal separation was also studied by Design-Expert software. It was shown that the bed temperature of the fluidized bed has a particular effect on its stability when the bed temperature was below 120 °C, which had a great influence on the separation. Finally, the probable deviation E of the mild-hot gas-solid fluidized bed under optimum operation conditions could be as low as 0.09 g/cm3 which showed the good separation ability.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 1; 184-195
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EF1α is a suitable housekeeping gene for RT-qPCR analysis during osteogenic differentiation of mouse bone marrow-derived mesenchymal stem cells
    Autorzy:
    Chen, Xingyun
    Zhang, Bo
    Zhao, Yan
    Liu, Ping
    Zhou, Yuanguo
    Powiązania:
    https://bibliotekanauki.pl/articles/1039535.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    EF1α; RGS4; 18S rRNA; RT-qPCR; RPL 13a; CCG-1986
    Opis:
    The expression of predominant housekeeping genes used in RT-qPCR can vary during development and differentiation. The frequently used housekeeping genes (ACTB, GAPDH, 18S rRNA, EF1α and RPL 13a) were evaluated during an early stage of the osteogenic differentiation of mouse bone marrow-derived mesenchymal stem cells (mMSCs) (under normal conditions or treated with CCG-4986) to identify housekeeping genes whose expression remained constant during osteogenic differentiation. When we used RGS4 mRNA, which was determined as copy number per μg of total RNA, to normalize gene expression, we observed that the relative EF1α expression profile was consistent with RGS4 expression after treatment with CCG-4986. All the relative expression profiles of the EF1α, 18S rRNA, and RPL13a housekeeping genes were consistent with RGS4 profiles determined by measuring mRNA copies under normal osteogenic differentiation conditions. The expression profiles calibrated by ACTB and GAPDH were not consistent with those determined using mRNA copy number in untreated cells or cells treated with CCG-4986 under osteogenic differentiation conditions. Under normal osteogenic differentiation conditions, EF1α, 18S rRNA, and RPL 13a are suitable housekeeping genes for RT-qPCR analysis. However, EF1α is the only suitable gene upon CCG-4986 treatment.
    Źródło:
    Acta Biochimica Polonica; 2013, 60, 3; 381-386
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary study to explore gene-$\text{PM}_\text{2.5}$ interactive effects on respiratory system in traffic policemen
    Autorzy:
    Zhao, Jinzhuo
    Bo, Liang
    Gong, Changyi
    Cheng, Peng
    Kan, Haidong
    Xie, Yuquan
    Song, Weimin
    Powiązania:
    https://bibliotekanauki.pl/articles/2177102.pdf
    Data publikacji:
    2015-08-07
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    inflammation
    Fine Particles
    traffic workers
    respiratory system
    single nucleotide polymorphism
    SNP
    Opis:
    Objectives Traffic-related particulate matter (PM) is one of the major sources of air pollution in metropolitan areas. This study is to observe the interactive effects of gene and fine particles (particles smaller than 2.5 μm – $\text{PM}_\text{2.5}$) on the respiratory system and explore the mechanisms linking $\text{PM}_\text{2.5}$ and pulmonary injury. Material and Methods The participants include 110 traffic policemen and 101 common populations in Shanghai, China. Continuous 24 h individual-level $\text{PM}_\text{2.5}$ is detected and the pulmonary function, high-sensitivity C-reactive protein (hs-CRP), Clara cell protein 16 (CC16) and the polymorphism in CXCL3, NME7 and C5 genes are determined. The multiple linear regression method is used to analyze the association between $\text{PM}_\text{2.5}$ and health effects. Meanwhile, the interactive effects of gene and $\text{PM}_\text{2.5}$ on lung function are analyzed. Results The individual $\text{PM}_\text{2.5}$ exposure for traffic policemen was higher than that in the common population whereas the forced expiratory volume in 1 s (FEV₁), the ratio of FEV₁ to forced vital capacity (FEV₁/FVC) and lymphocytes are lower. In contrast, the hs-CRP level is higher. In the adjusted analysis, $\text{PM}_\text{2.5}$ exposure was associated with the decrease in lymphocytes and the increase in hs-CRP. The allele frequencies for NME7 and C5 have significant differences between FEV₁/FVC ≤ 70% and FEV₁/FVC > 70% participants. The results didn’t find the interaction effects of gene and $\text{PM}_\text{2.5}$ on FEV₁/FVC in all the 3 genes. Conclusions The results indicated that traffic exposure to high levels of $\text{PM}_\text{2.5}$ was associated with systemic inflammatory response and respiratory injury. Traffic policemen represent a high risk group suffering from the respiratory injury.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2015, 28, 6; 971-983
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Looking at the Impacts of Income Inequality on Environmental Governance in China
    Analiza wpływu nierówności dochodowych na zarządzanie środowiskiem w Chinach
    Autorzy:
    Shi, Yao Bo
    Zhao, Xin Xin
    Jang, Chyi-Lu
    Fu, Qiang
    Chang, Chun-Ping
    Powiązania:
    https://bibliotekanauki.pl/articles/371481.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Komitet Człowiek i Środowisko PAN
    Tematy:
    income inequality
    environmental governance
    SYS-GMM
    LSDVC
    JEL codes
    Q56
    Q58
    O15
    nierówność dochodowa
    zarządzanie środowiskiem
    SYS_GMM
    Opis:
    This research investigates the impacts of income inequality (proxied by the Gini index) on environmental governance (proxied by per capita government investments on industrial pollution prevention) by employing the panel fixed effect model, system generalized method of moments and bias-corrected least-squares dummy variables model for 23 provinces from 1995 to 2014. The results indicate that income inequality exhibits significantly positive impacts on government environmental governance investment in China, which reveals that an increase in income inequality may help to improve environmental governance in China; we thus offer several remittable implications for those policy makers in Chinese provinces as well as governments of emergent economies like China.
    W niniejszym artykule zbadano wpływ nierówności dochodów (wykorzystując przez indeks Giniego) na zarządzanie środowiskiem (uwzględniając inwestycje rządu per capita na zapobieganie zanieczyszczeniom przemysłowym) poprzez zastosowanie modelu o stałych efektach panelowych, uogólnionej metody systemowej momentów i skorygowanego odchylenia modelu zmiennych pozornych najmniejszych kwadratów dla 23 chińskich prowincji w latach 1995-2014. Wyniki wskazują, że nierówność dochodów może wywierać znaczny pozytywny wpływ na rządowe inwestycje w zarządzanie środowiskiem w Chinach, co pokazuje, że wzrost nierówności w dochodach może przyczynić się do poprawy zarządzania środowiskiem w Chinach; oferujemy zatem kilka wymiernych rozwiązań dla decydentów w chińskich prowincjach, a także dla rządów wschodzących gospodarek, takich jak Chiny.
    Źródło:
    Problemy Ekorozwoju; 2019, 14, 2; 63-70
    1895-6912
    Pojawia się w:
    Problemy Ekorozwoju
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved flotation of auriferous arsenopyrite by using a novel mixed collector in weakly alkaline pulp
    Autorzy:
    Wang, Xiaohui
    Zhao, Kaile
    Bo, Hui
    Yan, Wu
    Wang, Zhen
    Gu, Guohua
    Gao, Zhiyong
    Powiązania:
    https://bibliotekanauki.pl/articles/1845220.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    gold mine
    arsenopyrite
    mixed collector
    flotation
    Opis:
    The purpose of using a mixed collector is to increase both flotation efficiency and selectivity. The mixed collector of potassium isopentyldithiocarbonate and N-dodecyl mercaptan exhibits high efficiency for the flotation of auriferous arsenopyrite, and the 2:1 mixing mass ratio of potassium isopentyldithiocarbonate and N-dodecyl mercaptan is preferred. Batch flotation tests indicate that a concentrate with the grade of 47.58 g/Mg Au and the recovery of 86.45% Au is achieved by using the mixed potassium isopentyldithiocarbonate/N-dodecyl mercaptan in weakly alkaline pulp. The collector mixture potassium isopentyldithiocarbonate + N-dodecyl mercaptan has greater adsorption density on the arsenopyrite surface than other conventional mixed collectors. The mixed potassium isopentyldithiocarbonate/N-dodecyl mercaptan can adsorb onto the arsenopyrite surface by intense chemisorptions, and the Sulfur-Iron chemical complexation is considered as the main adsorption mode. This is the reason why mixed potassium isopentyldithiocarbonate and N-dodecyl mercaptan collector can improve the flotation efficiency of auriferous sulfides.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 5; 996-1004
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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