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Wyszukujesz frazę "Cheng, Meng" wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    A self-scheduling strategy of virtual power plant with electric vehicles considering margin indexes
    Autorzy:
    Jiao, Fengshun
    Deng, Yongsheng
    Li, Duo
    Wei, Bo
    Yue, Chengyan
    Cheng, Meng
    Zhang, Yapeng
    Zhang, Jiarui
    Powiązania:
    https://bibliotekanauki.pl/articles/949880.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electric vehicle (EV)
    response time margin (RTM)
    scheduling strategy
    state of charge margin (SOCM)
    virtual power plant (VPP)
    Opis:
    From the perspective of a virtual power plant (VPP) with electric vehicles (EVs), a self-scheduling strategy considering the response time margin (RTM) and state of charge margin (SOCM) is proposed. Firstly, considering the response state of the state of charge (SOC) and charge-discharge state of EVs, a VPP based response capacity determination model of EVs is established. Then, RTM and SOCM indexes are introduced on the basis of the power system scheduling target and the EV users’ traveling demands. The RTM and SOCM indices are calculated and then are used to generate a priority sequence of responsive EVs for the VPP. In the process of the scheduling period and rolling iteration, the scheduling schemes of the EVs in the VPP for multiple time periods are determined. Finally, the VPP self-scheduling strategy is validated by taking an VPP containing three kinds of EV users as an example. Simulation results show that with the proposed strategy, the VPP is able to respond to the scheduling power from the power system, while ensuring the traveling demands of the EV users at the same time.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 4; 907-920
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An SFA-HMM performance evaluation method using state difference optimization for running gear systems in high-speed trains
    Autorzy:
    Cheng, Chao
    Wang, Meng
    Wang, Jiuhe
    Shao, Junjie
    Chen, Hongtian
    Powiązania:
    https://bibliotekanauki.pl/articles/2172116.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    slow feature analysis
    SFA
    performance evaluation
    hidden Markov model
    HMM
    running gear system
    analiza cech
    ocena efektywności
    ukryty model Markowa
    układ biegowy
    Opis:
    The evaluation of system performance plays an increasingly important role in the reliability analysis of cyber-physical systems. Factors of external instability affect the evaluation results in complex systems. Taking the running gear in high-speed trains as an example, its complex operating environment is the most critical factor affecting the performance evaluation design. In order to optimize the evaluation while improving accuracy, this paper develops a performance evaluation method based on slow feature analysis and a hidden Markov model (SFA-HMM). The utilization of SFA can screen out the slowest features as HMM inputs, based on which a new HMM is established for performance evaluation of running gear systems. In addition to directly classical performance evaluation for running gear systems of high-speed trains, the slow feature statistic is proposed to detect the difference in the system state through test data, and then eliminate the error evaluation of the HMM in the stable state. In addition, indicator planning and status classification of the data are performed through historical information and expert knowledge. Finally, a case study of the running gear system in high-speed trains is discussed. After comparison, the result shows that the proposed method can enhance evaluation performance.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2022, 32, 3; 389--402
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    2-Spanning Cyclability Problems of Some Generalized Petersen Graphs
    Autorzy:
    Yang, Meng-Chien
    Hsu, Lih-Hsing
    Hung, Chun-Nan
    Cheng, Eddie
    Powiązania:
    https://bibliotekanauki.pl/articles/31348327.pdf
    Data publikacji:
    2020-08-01
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    Petersen graph
    spanning cyclable
    Opis:
    A graph G is called r-spanning cyclable if for every r distinct vertices v1, v2, . . ., vr of G, there exists r cycles C1, C2, . . ., Cr in G such that vi is on Ci for every i, and every vertex of G is on exactly one cycle Ci. In this paper, we consider the 2-spanning cyclable problem for the generalized Petersen graph GP (n, k). We solved the problem for k ≤ 4. In addition, we provide an additional observation for general k as well as stating a conjecture.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2020, 40, 3; 713-731
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A BIM technology-based underwater structure damage identification and management method
    Autorzy:
    Li, Xiaofei
    Su, Rongrong
    Cheng, Peng
    Sun, Heming
    Meng, Qinghang
    Song, Taiyi
    Wei, Mengpu
    Zhang, Chen
    Powiązania:
    https://bibliotekanauki.pl/articles/2204531.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    building information modeling
    underwater structural disease
    damage identification
    deep learning
    modelowanie informacji o budynku
    identyfikacja uszkodzeń
    uczenie głębokie
    uszkodzenie podwodnej konstrukcji
    Opis:
    With the continuous development of bridge technology, the condition assessment of large bridges has gradually attracted attention. Structural Health Monitoring (SHM) technology provides valuable information about a structure's existing health, keeping it safe and uninterrupted use under various operating conditions by mitigating risks and hazards on time. At the same time, the problem of bridge underwater structure disease is becoming more obvious, affecting the safe operation of the bridge structure. It is necessary to test the bridge’s underwater structure. This paper develops a bridge underwater structure health monitoring system by combining building information modeling (BIM) and an underwater structure damage algorithm. This paper is verified by multiple image recognition networks, and compared with the advantages of different networks, the YOLOV4 network is used as the main body to improve, and a lightweight convolutional neural network (Lite-yolov4) is built. At the same time, the accuracy of disease identification and the performance of each network are tested in various experimental environments, and the reliability of the underwater structure detection link is verified.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144602
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation of magnesium hydroxide by modifier-directed hydration and its effect on flame retardancy and mechanical properties of polypropylene
    Autorzy:
    Wang, Mei Jia
    Bai, Li Mei
    Zhang, Meng Ting
    Ma, Yu Xin
    Zhao, Liu Cheng
    Li, Shao Ying
    Powiązania:
    https://bibliotekanauki.pl/articles/27323651.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    modifier
    hydration preparation
    magnesium hydroxide
    polypropylene
    Opis:
    With the rapid development of the polymer materials industry and the improvement of people's environmental awareness, magnesium hydroxide has been widely used in polymer materials due to its high decomposition temperature, non-toxic smoke suppression, and the advantages of neutralizing harmful gases produced by polymer combustion. However, the conventional preparation methods of magnesium hydroxide exhibit several issues, including high hydrophilicity, elevated polarity, and limited compatibility with polymers. This research proposes an improved method by adding sodium stearate and KH560 modifier, controlling the rate of magnesium oxide and preparing magnesium hydroxide flame retardants using a modifier-directed hydration method. Various characterizations confirmed its morphology, particle size and structure. The magnesium hydroxide exhibits low polarity, small particle size, stable structure and excellent hydrophobicity (with a contact angle of 120.32°, and a free energy of 1.34mN/m). In parallel, the magnesium hydroxide/polypropylene composites demonstrate excellent flame retardancy (LOI of 25%, V-1 grade) and simultaneously enhance the dispersion of magnesium hydroxide within the polypropylene matrix, improving the material's toughness and strength.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 175706
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on safe disposal of cephalosporins based on kinetic pyrolysis mechanism
    Autorzy:
    Fan, Jiangxue
    Zhang, Meng
    Hou, Xiaofei
    Wang, Fang
    Bai, Mengyuan
    Jiao, Ruoxi
    Yang, Zhongyu
    Duan, Erhong
    Cheng, Fengfei
    Zhou, Wen
    Powiązania:
    https://bibliotekanauki.pl/articles/27315672.pdf
    Data publikacji:
    2023
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Distillation residues
    Thermal analysis kinetics
    Template “3-2-2”
    Template “1+1”
    Pyrolysis mechanism
    Opis:
    Based on the global goals for cleaner production and sustainable development, the pyrolysis behavior of cephalosporin residues was studied by TG-MS method. The influence of full temperature window on the safe disposal of residues was analyzed based on the “3-2-2” and “1+1” of thermal analysis kinetics, and the gas by-products of thermal degradation were monitored. Results showed that the pyrolysis of distillation residues were divided into low and high-temperature zones, including six stages. Maximum error rate (8.55%) by multiple scan rate was presented based on “3-2-2” pattern and maximum total fluctuation (33.7) by single scan rate was presented based on “1+1” pattern, which implied that the comprehensive multi-level comparison method was very reliable. The E value “E” of six stages showed an increasing trend ranging 166.8 to 872.8 kJ/mol. LgA(mean) was 27.28. Most mechanism function of stage 1, 2 were Z-L-T equation (3D), stage 3, 4, 6 were Avrami-Erofeev equation (AE3, AE4, AE2/3) and stage 5 was Reaction Order (O2). In addition, various small molecular micromolecule substances were detected such as C2H4O, C2H6, NH3, CH4, CO2 under full temperature windows and a possible pyrolysis path of residues was provided.
    Źródło:
    Polish Journal of Chemical Technology; 2023, 25, 4; 52--60
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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