Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Yi, Jun" wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Stepper motor open-loop control system modeling and control strategy optimization
    Autorzy:
    Zhang, Deode
    Wang, Jingqi
    Qian, Lei
    Yi, Jun
    Powiązania:
    https://bibliotekanauki.pl/articles/141113.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    acceleration and deceleration control
    open loop control
    stepper motor
    subdivision control
    system modeling
    Opis:
    The study of the subdivision driving technology of a stepper motor and two types of typical acceleration and deceleration curves aims at optimizing the open-loop control performance of the stepper motor. The simulation model of a two-phase hybrid stepper motor open-loop control system is set up based on the mathematical model of the stepper motor, in order to let the stepper motor have the smaller stepper angle, two types of typical acceleration and a deceleration curve algorithm are designed for the real- time online calculation based on the subdivision driving technology. It respectively carries out the simulation analysis for their control effects. The simulation results show that the parabolic acceleration and deceleration curves have a larger maximum in-step rotation angle and the faster dynamic response ability in the same control period, and at the same time, the position tracking error of an intermediate process is smaller.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 1; 63-75
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Force mechanism and conceptual design of reinforced concrete short beam without web reinforcement
    Autorzy:
    Chen, Yi-Jun
    Zhang, Hu-Zhi
    Lu, Bei-Rong
    Huang, Yao-Sen
    Powiązania:
    https://bibliotekanauki.pl/articles/2200825.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    reinforced concrete short beam
    topology optimization
    conceptual design
    load-transfer path
    Michell criterion
    Opis:
    Topology Optimization and Finite Element Analysis were carried out for reinforced concrete short beams to reveal the force mechanism. The results show that load-transfer paths for the beams can evolve from Bi-directional Evolutionary Structural Optimization and be mechanically supported by the Michell criterion. In the beams, the distribution of a high- -stress compression area appears as a truss under a concentrated load and a tie-arch under a uniform load. The beams do not have much higher bearing capacity but can consume many more materials. Consequently, new design ideas were recommended based on the load transfer paths obtained by Topology Optimization.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 4; 659--671
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the second largest eigenvalue of a mixed graph
    Autorzy:
    Zhou, Jun
    Fan, Yi-Zheng
    Wang, Yi
    Powiązania:
    https://bibliotekanauki.pl/articles/743812.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    mixed graph
    Laplacian eigenvalue
    degree
    Opis:
    Let G be a mixed graph. We discuss the relation between the second largest eigenvalue λ₂(G) and the second largest degree d₂(G), and present a sufficient condition for λ₂(G) ≥ d₂(G).
    Źródło:
    Discussiones Mathematicae Graph Theory; 2007, 27, 2; 373-384
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Who Protests and Why? The Impact of Socio-Economic Status on Protest Participation in Taiwan
    Autorzy:
    Wu, Jun-deh
    Chang, Yi-bin
    Powiązania:
    https://bibliotekanauki.pl/articles/943629.pdf
    Data publikacji:
    2017
    Wydawca:
    Szkoła Główna Handlowa w Warszawie
    Tematy:
    social protests
    social status
    Opis:
    In recent years, protest activities happened frequently in Taiwan. These protests have had profound conseąuences and changed the landscape of Taiwanese politics. Therefore, it is important to know who protests and why these people protest. This paper aims to answer two questions. First, what kind of people (according to their Socio-Economic Status, SES) is more likely to participate in protest? Second, how does SES influence protest participation? Our hypotheses are drawn from grievance theories, resources model and cultural change theory. We hypothesize that in Taiwan, people with higher SES tend to join in protest. The mechanisms are material condition, civic skills, and the value of post- materialism. Empirically, taking advantage of the World Values Survey 2010-2012, we use confirmatory factor analysis to construct an indicator of SES including education, income, and class. Then, we conduct structural equation modeling to test the mechanisms through which SES exerts influences. We find that in Taiwan, people with higher SES are more likely to protest. Moreover, civic skills are the most important mechanisms. Material condition also has a positive effect. Although the value of post- materialism can influence protest participation, whether people hold this value is unrelated to their SES.
    Źródło:
    Warsaw Forum of Economic Sociology; 2017, 8, 16; 47-74
    2081-9633
    Pojawia się w:
    Warsaw Forum of Economic Sociology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Camouflage Assessments with Digital Pattern Painting Based on the Multi-Scale Pattern-in-Picture Evaluation Model
    Autorzy:
    Jia, Qi
    Xu, Weidong
    Yi, Yang
    Liu, Jun
    Hu, Jianghua
    Zhu, Liyan
    Yang, Xin
    Powiązania:
    https://bibliotekanauki.pl/articles/24200962.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    computer-aided
    camouflage assessment
    pattern painting
    evaluation
    simulation
    military camouflage
    Opis:
    In general, traditional evaluations of target camouflage effects are usually conducted based on observational data and general results of statistical analysis. This widely applied methodology quantifies the detection and identification probabilities of camouflage objects but has considerable shortcomings. This data evaluation process is laborious and time-consuming and very low in reproducibility, which sheds light on the necessity of developing a more efficient method in this study field. The growth of computeraided image processing technology provides technical support for camouflage effect evaluation based on digital image processing. Digital pattern painting, which has been previously applied to combat utility uniforms, is a new methodology full of potential due to its broad geographical adaptability. This study proposes a multi-scale pattern-in-picture method to evaluate camouflage effects at different distances. We also established a computer-aided background image library and camouflage assessments with digital simulation and created an evaluation system that could be effectively applied to combat utility uniforms. More than 40 testers participated in this study, who were asked to score the designed camouflage schemes using the evaluation system proposed. The data from simulation assessments and individual evaluations show that the computer-aided simulation assessments conducted as part of this research can efficiently and objectively evaluate the camouflage effect on military objects.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2023, 31, 2; 39--50
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of a water hammer and cavitation on vibration transients in a reservoir-pipe-valve system
    Autorzy:
    Miao, Yang
    Qiu, Zaihui
    Zhang, Xiaolu
    Jiang, Yuncheng
    Pan, Jun
    Liu, Yi
    Zhang, Li
    Li, Kun
    Powiązania:
    https://bibliotekanauki.pl/articles/2055065.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    reservoir-pipe-valve system (RPV system)
    water hammer
    vibration
    cavitation
    Opis:
    An extraordinary phenomenon with violent oscillation, accompanied by an abnormal “click” sound is observed during the valve closing in a fuel feeding pipe system. A fluctuation model with flow cavitation, in which time-varying stiffness, time-varying damping coefficients and flow cavitation are comprehensively considered, is proposed. On this basis, a dynamic vibration equation is established and an expression of flow pressure at the valve port is derived. The critical displacement of the flow cavitation system is defined. When the vibration amplitude reaches the critical displacement, cavitation occurs. Based on this model, simulation of vibration displacement and flow pressure is given. The simulated transient process shows the phenomena of vibration fluctuation with cavitation. The results are compared with the experimental data measured by a pressure sensor. Under our experimental conditions, the critical displacement of vibration is 1.41mm, and the average relative pressure peak error is 0.022. The comparison between the simulation and experimental results shows that they are in an acceptable agreement.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2021, 59, 4; 611--622
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies