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Wyszukujesz frazę "Wang, Hongyan" wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    A sampling method based on improved firefly algorithm for profile measurement of aviation engine blade
    Autorzy:
    Huang, Zhi
    Zhao, Liao
    Li, Kai
    Wang, Hongyan
    Zhou, Tao
    Powiązania:
    https://bibliotekanauki.pl/articles/221479.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aviation engine blade
    coordinate measurement machine
    profile measurement
    improved firefly algorithm
    Opis:
    Coordinate Measurement Machines (CMMs) have been extensively used in inspecting mechanical parts with higher accuracy. In order to enhance the efficiency and precision of the measurement of aviation engine blades, a sampling method of profile measurement of aviation engine blade based on the firefly algorithm is researched. Then, by comparing with the equal arc-length sampling algorithm (EAS) and the equi-parametric sampling algorithm (EPS) in one simulation, the proposed sampling algorithm shows its better sampling quality than the other two algorithms. Finally, the effectiveness of the algorithm is verified by an experimental example of blade profile. Both simulated and experimental results show that the method proposed in this paper can ensure the measurement accuracy by measuring a smaller number of points.
    Źródło:
    Metrology and Measurement Systems; 2019, 26, 4; 757-771
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isolation and functional expression of a novel lipase gene isolated directly from oil-contaminated soil
    Autorzy:
    Zuo, Kaijing
    Zhang, Lida
    Yao, Hongyan
    Wang, Jin
    Powiązania:
    https://bibliotekanauki.pl/articles/1040372.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    meta-genomic library
    lipase
    gene cloning
    hydrolysis activity
    Opis:
    A lipase gene SR1 encoding an extracellular lipase was isolated from oil-contaminated soil and expressed in Escherichia coli. The gene contained a 1845-bp reading frame and encoded a 615-amino-acid lipase protein. The mature part of the lipase was expressed with an N-terminal histidine tag in E. coli BL21, purified and characterized biochemically. The results showed that the purified lipase combines the properties of Pseudomonas chlororaphis and other Serratia lipases characterized so far. Its optimum pH and temperature for hydrolysis activity was pH 5.5-8.0 and 37°C respectively. The enzyme showed high preference for short chain substrates (556.3±2.8 U/µg for C10 fatty acid oil) and surprisingly it also displayed high activity for long-chain fatty acid. The deduced lipase SR1 protein is probably from Serratia, and is organized as a prepro-protein and belongs to the GXSXG lipase family.
    Źródło:
    Acta Biochimica Polonica; 2010, 57, 3; 305-311
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Importance measure-based maintenance strategy considering maintenance costs
    Autorzy:
    Zhang, Chao
    Zhang, Yadong
    Dui, Hongyan
    Wang, Shaoping
    Tomovic, Mileta M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2057976.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    system reliability
    importance measure
    maintenance cost
    preventive maintenance
    opportunistic maintenance
    Opis:
    Maintenance is an important way to ensure the best performance of repairable systems. This paper considers how to reduce system maintenance cost while ensuring consistent system performance. Due to budget constraints, preventive maintenance (PM) can be done on only some of the system components. Also, different selections of components to be maintained can have markedly different effects on system performance. On the basis of the above issues, this paper proposes an importance-based maintenance priority (IBMP) model to guide the selection of PM components. Then the model is extended to find the degree of correlation between two components to be maintained and a joint importance-based maintenance priority (JIBMP) model to guide the selection of opportunistic maintenance (OM) components is proposed. Also, optimization strategies under various conditions are proposed. Finally, a case of 2H2E architecture is used to demonstrate the proposed method. The results show that generators in the 2E layout have the highest maintenance priority, which further explains the difference in the importance of each component in PM.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 1; 15--24
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Component Maintenance Strategies and Risk Analysis for Random Shock Effects Considering Maintenance Costs
    Autorzy:
    Zhang, Chao
    Zhang, Yadong
    Dui, Hongyan
    Wang, Shaoping
    Tomovic, Mileta M.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200830.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    system reliability
    preventive maintenance
    importance measure
    maintenance cost
    random shock
    Opis:
    Maintenance can improve a system’s reliability in a long operation period or when a component has failed. The reliability modeling method that uses the stochastic process degradation model to describe the system degradation process has been widely used. However, the existing reliability models established using stochastic processes only consider the internal degradation process, and do not fully consider the impact of external random shocks on their reliability modeling. Furthermore, the existing theory of importance does not consider the actual factors of maintenance cost. In this paper, based on the reliability modeling of random processes, the degradation rate under the influence of random shocks is introduced into the time scale function to solve the impact of random shocks on product reliability, and two cost importance measures are proposed to guide the maintenance selection of the components under limited resources in the system. Finally, a subsystem of an aircraft hydraulic system is analyzed to verify the proposed method’s performance.
    Źródło:
    Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 162011
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opportunistic maintenance strategy of a Heave Compensation System for expected performance degradation
    Autorzy:
    Zhang, Chao
    Qian, Yujie
    Dui, Hongyan
    Wang, Shaoping
    Chen, Rentong
    Tomovic, Mileta M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038156.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    opportunistic maintenance
    importance measure
    heave compensation
    hydraulic system
    Monte Carlo
    Opis:
    In the marine industry, heave compensation systems are applied to marine equipment to compensate for the adverse effects of waves and the hydraulic system is usually used as the power system of heave compensation systems. This article introduces importance theory to the opportunistic maintenance (OM) strategy to provide guidance for the maintenance of heave compensation systems. The working principle of a semi-active heave compensation system and the specific working states of its hydraulic components are also first explained. Opportunistic maintenance is applied to the semi-active heave compensation system. Moreover, the joint integrated importance measure (JIIM) between different components at different moments is analyzed and used as the basis for the selection of components on which to perform PM, with the ultimate goal of delaying the degradation of the expected performance of the system. Finally, compared with conditional marginal reliability importance (CMRI)based OM, the effectiveness of JIIM-based OM is verified by the Monte Carlo method.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 3; 512-521
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ribosomal proteins L34 and S29 of amphioxus Branchiostoma belcheri tsingtauense: cDNAs cloning and gene copy number
    Autorzy:
    Liu, Lina
    Zhang, Shicui
    Liu, Zhenhui
    Li, Hongyan
    Liu, Mei
    Wang, Yongjun
    Ma, Lifang
    Powiązania:
    https://bibliotekanauki.pl/articles/1041331.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    amphioxus
    ribosomal protein
    S29
    copy number
    Branchiostoma
    L34
    Opis:
    The complete cDNA and deduced amino-acid sequences of ribosomal proteins L34 (AmphiL34) and S29 (AmphiS29) from the amphioxus Branchiostoma belcheri tsingtauense were identified in this study. The AmphiL34 cDNA is 435 nucleotides in length and encodes a 118 amino-acid protein with calculated molecular mass of 13.6 kDa. It shares 53.6-67.5% amino-acid sequence identity with its eukaryotic counterparts including human, mouse, rat, pig, frog, catfish, fruit fly, mosquito, armyworm, nematode and yeast. The AmphiS29 cDNA comprises 453 nucleotides and codes for a 56 amino-acid protein with a calculated molecular mass of 6.6 kDa. It shows 66.1-78.6% amino-acid sequence identity to eukaryotic S29 proteins from human, mouse, rat, pig, zebrafish, seahorse, fruit fly, nematode, sea hare and yeast. AmphiL34 contains a putative nucleolar localization signal, while AmphiS29 has a zinc finger-like domain. A phylogenetic tree deduced from the conserved sequences of AmphiL34 and AmphiS29 and other known counterparts indicates that the positions of AmphiL34/AmphiS29 are intermediate between the vertebrate and invertebrate L34/S29. Southern blot analysis demonstrates the presence of one copy of the L34 gene and 2-3 copies of the S29 gene in the genome of the amphioxus B. belcheri tsingtauense. This is in sharp contrast to the existence of 7-9 copies of the L34 gene and 14-17 copies of the S29 gene in the rat genome. These date suggest that housekeeping genes like AmphiL34 and AmphiS29 have undergone large-scale duplication in the chordate lineage.
    Źródło:
    Acta Biochimica Polonica; 2005, 52, 4; 857-862
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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