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    Wyświetlanie 1-14 z 14
    Tytuł:
    Simulation and Analysis of Sintering Furnace Temperature Based on Fuzzy Neural Network Control
    Autorzy:
    Chaoxin, Zou
    Rong, Li
    Zhiping, Xie
    Ming, Su
    Jingshi, Zeng
    Xu, Ji
    Xiaoli, Ye
    Ye, Wang
    Powiązania:
    https://bibliotekanauki.pl/articles/1837792.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fuzzy neural network
    furnace
    sintering
    temperature control
    PID
    sieć neuronowa rozmyta
    piec
    spiekanie
    kontrola temperatury
    Opis:
    Aiming at the problems of delay and couple in the sintering temperature control system of lithium batteries, a fuzzy neural network controller that can solve complex nonlinear temperature control is designed in this paper. The influence of heating voltage, air inlet speed and air inlet volume on the control of temperature of lithium battery sintering is analyzed, and a fuzzy control system by using MATLAB toolbox is established. And on this basis, a fuzzy neural network controller is designed, and then a PID control system and a fuzzy neural network control system are established through SIMULINK. The simulation shows that the response time of the fuzzy neural network control system compared with the PID control system is shortened by 24s, the system stability adjustment time is shortened by 160s, and the maximum overshoot is reduced by 6.1%. The research results show that the fuzzy neural network control system can not only realize the adjustment of lithium battery sintering temperature control faster, but also has strong adaptability, fault tolerance and anti-interference ability.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 23-30
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation and Analysis of Sintering Furnace Temperature Based on Fuzzy Neural Network Control
    Autorzy:
    Chaoxin, Zou
    Rong, Li
    Zhiping, Xie
    Ming, Su
    Jingshi, Zeng
    Xu, Ji
    Xiaoli, Ye
    Ye, Wang
    Powiązania:
    https://bibliotekanauki.pl/articles/1837849.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fuzzy neural network
    furnace
    sintering
    temperature control
    PID
    sieć neuronowa rozmyta
    piec
    spiekanie
    kontrola temperatury
    Opis:
    Aiming at the problems of delay and couple in the sintering temperature control system of lithium batteries, a fuzzy neural network controller that can solve complex nonlinear temperature control is designed in this paper. The influence of heating voltage, air inlet speed and air inlet volume on the control of temperature of lithium battery sintering is analyzed, and a fuzzy control system by using MATLAB toolbox is established. And on this basis, a fuzzy neural network controller is designed, and then a PID control system and a fuzzy neural network control system are established through SIMULINK. The simulation shows that the response time of the fuzzy neural network control system compared with the PID control system is shortened by 24s, the system stability adjustment time is shortened by 160s, and the maximum overshoot is reduced by 6.1%. The research results show that the fuzzy neural network control system can not only realize the adjustment of lithium battery sintering temperature control faster, but also has strong adaptability, fault tolerance and anti-interference ability.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 23-30
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ponad granicami
    Autorzy:
    Cheng, Li-Rong Lilly
    Powiązania:
    https://bibliotekanauki.pl/articles/690460.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Opis:
    The article doesn't have Abstract.
    Artykuł nie zawiera streszczenia w jezyku polskim.
    Źródło:
    Annales Universitatis Mariae Curie-Sklodowska, sectio N – Educatio Nova; 2016, 1
    2451-0491
    Pojawia się w:
    Annales Universitatis Mariae Curie-Sklodowska, sectio N – Educatio Nova
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Laplacian spectrum of some digraphs obtained from the wheel
    Autorzy:
    Su, Li
    Li, Hong-Hai
    Zheng, Liu-Rong
    Powiązania:
    https://bibliotekanauki.pl/articles/743220.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    digraph
    Laplacian matrix
    eigenvalue
    wheel
    Opis:
    The problem of distinguishing, in terms of graph topology, digraphs with real and partially non-real Laplacian spectra is important for applications. Motivated by the question posed in [R. Agaev, P. Chebotarev, Which digraphs with rings structure are essentially cyclic?, Adv. in Appl. Math. 45 (2010), 232-251], in this paper we completely list the Laplacian eigenvalues of some digraphs obtained from the wheel digraph by deleting some arcs.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2012, 32, 2; 255-261
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Primary parametric resonance of an axially accelerating beam subjected to static loads
    Autorzy:
    Hu, Y.
    Rong, Y.
    Li, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/949296.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    current-carrying beam
    primary parametric resonance
    magnetic field
    axial movement
    static loads
    Opis:
    Primary parametric resonance and stability of an axially accelerating and current-carrying beam subjected to static loads in magnetic field are investigated. The nonlinear magneto-elastic vibration equation is derived. The approximate solution of the static problem and the disturbance deferential equation of the beam with two sides simply supported are obtained. The frequency-response equation of primary parametric resonance is further achieved by a multi-scale method. According to stability conditions, the stability of the steady-state solution is also discussed. By numerical examples, the amplitude versus different parameter curves and the bifurcation diagrams of the amplitude are acquired. The effects of magnetic induction intensity, axial speed, detuning parameter and static loads on nonlinear vibration characteristics are also analyzed.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2018, 56, 3; 815-828
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Asymmetrical Bending Pipe with Different Gating Systems on Low-Pressure Metal Mold Casting
    Autorzy:
    Wang, Ning
    Li, Rong
    Zhang, ZiQi
    Zeng, Qi
    Powiązania:
    https://bibliotekanauki.pl/articles/27314123.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    pipe of aluminum
    asymmetrical bending
    metal mould
    low-pressure casting
    casting simulation
    rura aluminiowa
    forma asymetryczna
    odlewanie niskociśnieniowe
    symulacja odlewania
    Opis:
    To prepare a high-quality asymmetrical bending pipe of aluminum alloy by casting, the parting surfaces of the asymmetrical parts were determined based on the characteristics of the parts. Also, the forming process was designed and calculated. After that, the different types of gating systems were designed and the casting process was calculated by ProCAST, and then the influence of different casting gating systems on asymmetrical bending pipes was analyzed. The simulation results show that in the solidification process, although the filling speed of the single runner was slow, but the filling was stable. The gating system with a single runner-round flange filling system would lead to being more uniform for filling flow field and be sequential solidification of temperature field distribution, and stronger of the feeding ability. During the solidification process, the solid phase ratio of the single runner-round flange casting system is larger, and the shrinkage volume is smaller, which made the quality of castings better. Finally, a metal mold and core were made to cast a perfect asymmetric bending pipe of aluminum alloy product in a die casting machine. So the single runner-round flange filling system is suitable for asymmetrical bending pipe casting.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 1; 83--102
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influencing mechanisms of sodium hexametaphosphate on molybdenite flotation using sea water
    Autorzy:
    Wang, Lizhangzheng
    Li, Yubiao
    Fan, Ruihua
    Fan, Rong
    Powiązania:
    https://bibliotekanauki.pl/articles/109351.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    sodium hexametaphosphate
    flotation
    molybdenite
    sea water
    mechanism
    Opis:
    Flotation using sea water has been considered as a promising alternative to concentrate molybdenite (MoS2) under alkaline conditions due to scarcity of fresh water and increasingly strict regulations on the quality of discharged water. However, the MoS2 recovery with sea water during flotation has not been satisfactory, owing to the depressing effects from the hydrophilic metallic species onto MoS2 surface. This study combines experimental and theoretical studies of MoS2 flotation to investigate how the physicochemical properties of MoS2 vary with the addition of a dispersant, sodium hexametaphosphate (SHMP), and in sea and fresh water. Our experimental results show that the addition of SHMP during flotation has increased the recovery of MoS2, via reducing the adsorption of the hydrophilic metallic precipitation onto MoS2 surface. The DLVO calculation confirms that the addition of SHMP increases the floatability of MoS2 by dispersing the formed hydrophilic metallic precipitation (Mg(OH)2 colloids) from the MoS2 surface, via reversing attraction force to repulsion force, thereby improving MoS2 flotation recovery.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1091-1098
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Automatic calibration system for digital-display vibrometers based on machine vision
    Autorzy:
    He, W.
    Xu, G.
    Rong, Z.
    Li, G.
    Liu, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/221163.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    image recognition
    calibration
    vibration measurement
    machine vision
    automatic testing
    digital-display vibrometer
    Opis:
    Considering the low efficiency during the process of traditional calibration for digital-display vibrometers, an automatic calibration system for vibrometers based on machine vision is developed. First, an automatic vibration control system is established on the basis of a personal computer, and the output of a vibration exciter on which a digital-display vibrometer to be calibrated is installed, is automatically adjusted to vibrate at a preset vibration level and a preset frequency. Then the display of the vibrometer is captured by a digital camera and identified by means of image recognition. According to the vibration level of the exciter measured by a laser interferometer and the recognized display of the vibrometer, the properties of the vibrometer are calculated and output by the computer. Image recognition algorithms for the display of the vibrometer with a high recognition rate are presented, and the recognition for vibrating digits and alternating digits is especially analyzed in detail. Experimental results on the built-up system show that the prposed image recognition methods are very effective and the system could liberate operators from boring and intense calibration work for digital-display vibrometers.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 2; 317-328
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Al-Cu Cast Alloy Composition for Hydraulic Valves
    Autorzy:
    Li, Rong
    Chen, Lunjun
    Zeng, Qi
    Su, Ming
    Xie, Zhiping
    Powiązania:
    https://bibliotekanauki.pl/articles/381745.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Cu alloy
    optimization
    strengthening mechanisms
    hydraulic multi-way valve
    stop Al-Cu
    optymalizacja
    mechanizm wzmacniający
    zawór hydrauliczny
    Opis:
    In order to identify the influence of different Mn, Cd, V and Zr content on the properties of Al-Cu casting alloys in hydraulic valves, orthogonal test methods were used to prepare alloy test bars with different elements and contents. Tensile tests were performed on the test bars so obtained. The microstructure of alloys with different compositions is studied. The results show that adding approximately 0.4% of Mn can not only form a strengthening phase but also reduce the excessive segregation of the matrix along the grain boundary. A Cd content of 0.2% can promote the formation of micro Cd spheres in the softer aluminum matrix. Hard spots increase the wear resistance of the material; however, an excess of Cd will cause element segregation and deteriorate the mechanical properties of the valve body. Zr and V refine the grains in the alloy; however, an excess of these elements will lead to a large area of segregation. If proper heat treatment is lacking, the mechanical properties of the valve body deteriorate.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 1; 84-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Battery/super-capacitor HESS applied in DC microgrid
    Autorzy:
    Zhang, Zhen
    Baoge Zhang, Baoge
    Wang, Donghao
    Li, Ping
    Rong, Yao
    Powiązania:
    https://bibliotekanauki.pl/articles/140713.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    battery
    bi-directional DC/DC converter
    HESS
    super-capacitor
    voltage closedloop
    Opis:
    Energy storage technology (EST) is an effective way to improve the power quality of renewable energy generation (such as solar energy and wind energy), but a single energy storage system (ESS) is difficult to meet the demand for the safe operation of the grid. According to the structure and operation characteristics of the existing battery/super-capacitor hybrid energy storage system (HESS), a battery/super-capacitor HESS is proposed. The working principle and three working modes (the super-capacitor pre-charging cold standby mode, the boost mode and buck mode) of the HESS are analyzed in detail. The state equations of the boost mode and buck mode are derived. The state space average method is used to establish the small signal equivalent model under the buck/boost mode. Moreover, the charge and discharge control strategy of the HESS is obtained by combining the voltage closed-loop control. The simulation model is built in Matlab/Simulink to verify the effectiveness of the proposed HESS and its control strategy. The results show that the HESS and its control strategy can ensure the DC bus voltage has good stability and superior anti-interference, and it can simultaneously provide large current, increase the battery life, and improve the technical economy of energy storage.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 2; 379-388
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhanced separation efficiency of low–rank coal using waste engine oil as a flotation collector
    Autorzy:
    Li, Ming
    Xia, Yangchao
    Guo, Fangyu
    Rong, Guoqiang
    Li, Guosheng
    Xu, Baolin
    Xing, Yaowen
    Gui, Xiahui
    Powiązania:
    https://bibliotekanauki.pl/articles/109613.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    low rank coal
    engine oil
    waste engine oil
    flotation
    Opis:
    Because of the rich oxygen-containing functional groups and developed pores on the Surface of low-rank coal, it is difficult to realize efficient separation during low-rank coal flotation using common oil collectors. Waste engine oil (WEO) is abundant in polar oxygen-containing functional groups and could be an alternative collector. In this study, the effect of WEO on low-rank coal floatation was assessed and engine oil (EO) was also used for comparison. The results show that the separation efficiency of low-rank coal can be significantly improved using WEO; additionally, 96.73% of the clean coal yield can be obtained when the WEO dosage was only 4 kg/t. Compared with EO, the bubble–particle induction time in the presence of WEO shortened from 430 to 220 ms. Moreover, more low-rank coal particles were captured and adhered to the bubble surface using WEO, which indicated a higher probability of bubble–particle attachment. Nonpolar components, polar components and metal ions synergistically promote the flotation separation enhancement of low-rank coal using WEO.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 2; 252-263
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of the seat cushion contour and the sitting posture on surface pressure distribution and comfort during seated work
    Autorzy:
    Li, Wenhua
    Mo, Rong
    Yu, Suihuai
    Chu, Jianjie
    Hu, Yukun
    Wang, Long
    Powiązania:
    https://bibliotekanauki.pl/articles/2116553.pdf
    Data publikacji:
    2020-09-17
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    comfort
    seat cushion
    seat cushion contour
    surface pressure distribution
    office chair
    pressure measurement
    Opis:
    ObjectivesThe purpose of this paper is to investigate the effects of the seat cushion contour and the sitting posture on the seat pan interface pressure distribution and subjective comfort perception.Material and MethodsOverall, 16 volunteers typed a text passage on a laptop while seated, by assuming 3 kinds of common sitting postures (forward, relaxed and upright) in 4 seat cushion configurations: chair only, and chair with 1 of 3 supplementary cushions. Pressure data and cushion comfort ratings were collected in the experiment.ResultsIt was found that the sitting posture and the seat cushion contour had different impacts on surface pressure. The seat cushion contour had an impact on pressure parameters and pressure distribution on the seat pan, while the sitting posture affected the location of peak pressure on the seat pan. The correlation analysis revealed that the subjective comfort rating was significantly correlated with average pressure (AP) and mean peak pressure (MPP).ConclusionsThe conclusion was that the cushion contour had a greater effect on seat pan interface pressure parameters than the sitting posture. Notably, AP and MPP can be indicators for assessing seat cushion comfort in a short-term perspective.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2020, 33, 5; 675-689
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effective sensor placement based on a VIKOR method considering common cause failure in the presence of epistemic uncertainty
    Autorzy:
    Duan, Rong-Xing
    He, Jie-Jun
    Feng, Tao
    Huang, Shu-Juan
    Chen, Li
    Powiązania:
    https://bibliotekanauki.pl/articles/1841697.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    dynamic fault tree
    epistemic uncertainty
    sensor placement
    reliability criterion
    diagnostic sensor model
    Opis:
    Owing to expensive cost and restricted structure, limited sensors are allowed to install in modern systems to monitor the working state, which can improve their availability. Therefore, an effective sensor placement method is presented based on a VIKOR algorithm considering common cause failure (CCF) under epistemic uncertainty in this paper. Specifically, a dynamic fault tree (DFT) is developed to build a fault model to simulate dynamic fault behaviors and some reliability indices are calculated using a dynamic evidence network (DEN). Furthermore, a VIKOR method is proposed to choose the possible sensor locations based on these indices. Besides, a sensor model is introduced by using a priority AND gate (PAND) to describe the failure sequence between a sensor and a component. All placement schemes can be enumerated when the number of sensors is given, and the largest system reliability is the best alternative among the placement schemes. Finally, a case study shows that CCF has some influence on sensor placement and cannot be neglected in the reliabilitybased sensor placement.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 2; 253-262
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancement of the Stabilities and Intracellular Antioxidant Activities of Lavender Essential Oil by Metal-Organic Frameworks Based on β-Cyclodextrin and Potassium Cation
    Autorzy:
    Wang, Ying
    Wang, Liang
    Tan, Jin
    Li, Rong
    Jiang, Zi-Tao
    Tang, Shu-Hua
    Powiązania:
    https://bibliotekanauki.pl/articles/1363277.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    microcapsulation
    thermal stability
    pH stability
    cell viability
    cellular antioxidant model
    application extension
    Opis:
    Lavender (Lavandula angustifolia) is an important medicinal and aromatic plant. However, the application of lavender essential oil (LEO) is limited by its instability, low solubility and high volatility. Therefore, to improve the stabilities and antioxidant activities of LEO and thereby expand the applications, LEO was microencapsulated by metal-organic frameworks based on β-cyclodextrin and potassium cation (K-βCD-MOFs) with different mass core/wall ratios. The results showed that the best inclusion rate was 96.67% with the ratio of 1:10. Then, the optimum inclusion product was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The thermal and pH stabilities and the intracellular antioxidant activities were also studied. The results showed that the stabilities of the oil with K-βCD-MOFs inclusions and their abilities to resist acid and alkali were significantly stronger than those of LEO itself. In addition, the intracellular antioxidant activities of LEO were also enhanced by the K-βCD-MOFs inclusion. These results suggested the potential of K-βCD-MOFs as carriers for essential oils in food industry applications.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2021, 71, 1; 39-50
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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