Wszystkie pola: Wang, Yang

Skocz do pozycji: 1.

Tytuł:: On regular copying languages
Autorzy:: Wang, Yang
Hunter, Tim
Tematy:: reduplication
copying
finite-state machinery
queue automata; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/24201233.pdf Link otwiera się w nowym oknie
Opis:: This paper proposes a formal model of regular languages enriched with unbounded copying. We augment finite-state machinery with the ability to recognize copied strings by adding an unbounded memory buffer with a restricted form of first-in-first-out storage. The newly introduced computational device, finite-state buffered machines (FS-BMs), characterizes the class of regular languages and languages de-rived from them through a primitive copying operation. We name this language class regular copying languages (RCLs). We prove a pumping lemma and examine the closure properties of this language class. As suggested by previous literature (Gazdar and Pullum 1985, p.278), regular copying languages should approach the correct characteriza-tion of natural language word sets.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Azo dye wastewater treatment in a novel process of biofilm coupled with electrolysis
Autorzy:: Zou, Haiming
Chu, Lin
Wang, Yang
Tematy:: azo dye wastewater treatment
color removal
biofilm
electrolysis
bioelectrochemical system; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/204706.pdf Link otwiera się w nowym oknie
Opis:: Azo dye wastewater treatment is urgent necessary nowadays. Electrochemical technologies commonly enable more efficient degradation of recalcitrant organic contaminants than biological methods, but those rely greatly on the energy consumption. A novel process of biofilm coupled with electrolysis, i.e., bioelectrochemical system (BES), for methyl orange (MO) dye wastewater treatment was proposed and optimization of main influence factors was performed in this study. The results showed that BES had a positive effect on enhancement of color removal of MO wastewater and 81.9% of color removal efficiency was achieved at the optimum process parameters: applied voltage of 2.0 V, initial MO concentration of 20 mg/L, glucose loads of 0.5 g/L and pH of 8.0 when the hydraulic retention time (HRT) was maintained at 3 d, displaying an excellent color removal performance. Importantly, a wide range of effective pH, ranging from 6 to 9, was found, thus greatly favoring the practical application of BES described here. The absence of a peak at 463 nm showed that the azo bond of MO was almost completely cleaved after degradation in BES. From these results, the proposed method of biodegradation combined with electrochemical technique can be an effective technology for dye wastewater treatment and may hopefully be also applied for treatment of other recalcitrant compounds in water and wastewater
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Assessing system impedance based on data regrouping
Autorzy:: Xu, Shuangting
Xiao, Xianyong
Wang, Yang
Wu, Jun
Tematy:: system impedance
passive method
Thevenin equivalent
power system; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/1848965.pdf Link otwiera się w nowym oknie
Opis:: In recent years, assessing supply system impedance has become crucial due to the concerns on power quality and the proliferation of distributed generators. In this paper, a novel method is shown for passive measurement of system impedances using the gapless waveform data collected by a portable power quality monitoring device. This method improves the overall measurement accuracy through data regrouping. Compared with the traditional methods that use the consecutive measurement data directly, the proposed method regroups the data to find better candidates with less flotation on the system side. Simulation studies and extensive field tests have been conducted to verify the effectiveness of the proposed method. The results indicate that the proposed method can serve as a useful tool for impedance measurement tasks performed by utility companies.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Assessing system impedance based on data regrouping
Autorzy:: Xu, Shuangting
Xiao, Xianyong
Wang, Yang
Wu, Jun
Tematy:: system impedance
passive method
Thevenin equivalent
power system; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/1848954.pdf Link otwiera się w nowym oknie
Opis:: In recent years, assessing supply system impedance has become crucial due to the concerns on power quality and the proliferation of distributed generators. In this paper, a novel method is shown for passive measurement of system impedances using the gapless waveform data collected by a portable power quality monitoring device. This method improves the overall measurement accuracy through data regrouping. Compared with the traditional methods that use the consecutive measurement data directly, the proposed method regroups the data to find better candidates with less flotation on the system side. Simulation studies and extensive field tests have been conducted to verify the effectiveness of the proposed method. The results indicate that the proposed method can serve as a useful tool for impedance measurement tasks performed by utility companies.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Azo dye wastewater treatment in a novel three-dimensional electrode reactor
Autorzy:: Zou, Haiming
Sun, Zhili
Jiao, Zhengtong
Wang, Yang
Tematy:: methyl orange
industrial wastewater
three-dimensional electrode reactor
removal mechanism
oranż metylowy
ścieki przemysłowe
trójwymiarowy reactor elektrodowy
mechanizm usuwania; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/2086907.pdf Link otwiera się w nowym oknie
Opis:: A novel three-dimensional electrode reactor (3DER) was designed to treat the dye wastewater. The performance of 3DER was evaluated via methyl orange (MO) removal efficiency. For comparison, the performance of the two-dimensional electrode reactor (2DER) was also assessed. Furthermore, the effects of electrolyte and aeration on treatment performance were preliminarily evaluated to further optimize the operation on 3DER. A repeatable and stable MO treatment efficiency was obtained in the 3DER. The MO removal rate reached 79.5% at the applied voltage of 1.0 V, electrode spacing of 2 cm and initial MO concentration of 60 mg/dm3, significantly higher than that in the 2DER (58.8%), suggesting the obvious improvement of particle electrodes on MO removal. Both adding electrolyte and air sparging into the 3DER contributed to the enhancement of the MO removal rate. These results obtained here suggest that the 3DER may provide an effective alternative for the treatment of azo dye wastewater and/or non-biodegradable industrial wastewaters.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: An adaptive k nearest neighbour method for imputation of missing traffic data based on two similarity metrics
Autorzy:: Wang, Yang
Xiao, Yu
Lai, Jianhui
Chen, Yanyan
Tematy:: missing traffic data
similarity metrics
K-nearest neighbour method
stochastic characteristics
metoda porównywania danych
metryki podobieństwa
metoda najbliższego sąsiada
cechy stochastyczne; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/949848.pdf Link otwiera się w nowym oknie
Opis:: Traffic flow is one of the fundamental parameters for traffic analysis and planning. With the rapid development of intelligent transportation systems, a large number of various detectors have been deployed in urban roads and, consequently, huge amount of data relating to the traffic flow are accumulatively available now. However, the traffic flow data detected through various detectors are often degraded due to the presence of a number of missing data, which can even lead to erroneous analysis and decision if no appropriate process is carried out. To remedy this issue, great research efforts have been made and subsequently various imputation techniques have been successively proposed in recent years, among which the k nearest neighbour algorithm (kNN) has received a great popularity as it is easy to implement and impute the missing data effectively. In the work presented in this paper, we firstly analyse the stochastic effect of traffic flow, to which the suffering of the kNN algorithm can be attributed. This motivates us to make an improvement, while eliminating the requirement to predefine parameters. Such a parameter-free algorithm has been realized by introducing a new similarity metric which is combined with the conventional metric so as to avoid the parameter setting, which is often determined with the requirement of adequate domain knowledge. Unlike the conventional version of the kNN algorithm, the proposed algorithm employs the multivariate linear regression model to estimate the weights for the final output, based on a set of data, which is smoothed by a Wavelet technique. A series of experiments have been performed, based on a set of traffic flow data reported from serval different countries, to examine the adaptive determination of parameters and the smoothing effect. Additional experiments have been conducted to evaluate the competent performance for the proposed algorithm by comparing to a number of widely-used imputing algorithms.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Dynamic characteristics of underframe semi-active inerter-based suspended device for high-speed train based on LQR control
Autorzy:: Wang, Yong
Li, Hao-Xuan
Meng, Hao-Dong
Wang, Yang
Tematy:: dynamic characteristics
high-speed train
inerter-based suspended device
LQR control
Sperling index
charakterystyka dynamiczna
pociąg dużych prędkości
aktywne zawieszenie na bazie inertera
kontrola LQR
indeks Sperlinga; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2173695.pdf Link otwiera się w nowym oknie
Opis:: The underframe passive inerter-based suspended device, based on the inerter-spring-damper vibration attenuation structure, could improve the dynamic performance of the train body, but its parameters are fixed and cannot meet the dynamic performance requirements under different operating conditions. Therefore, a semi-active inerter-based suspended device based on the linear quadratic regulator (LQR) control strategy is proposed to further enhance the dynamic performance. The rigid-flexible coupling vertical dynamic model of the train body and an underframe semi-active inerter-based suspended device are established. The structural parameters of the semi-active inerter-based suspended device are adjusted using LQR control strategy. Dynamic response of the system is obtained using the virtual excitation method. The dynamic characteristic of the system is evaluated using the Sperling index and compared with those of the passive and semi-active traditional suspended devices as well as the passive inerter-based suspended devices. The vertical vibration acceleration of the train body and Sperling index using the semi-active inerter-based suspended device is the smallest among the four suspended devices, which denotes the advantages of using the inerter and LQR control strategy. The semi-active inerter-based suspended device could decrease the vertical vibration acceleration of the train body and further suppress its elastic vibration in the lower frequency band, more effectively than the other three suspended devices. Overall, the semi-active inerter-based suspended device could significantly reduce elastic vibration of the train body and improve its dynamical performance.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Forecasting method of electric vehicle charging load based on virtual prediction parameter estimation strategy
Autorzy:: Cai, Yongxiang
Chen, Qing
Wang, Yang
Li, Wei
Ren, Jiakuan
Qu, Yangquan
Tematy:: distribution network
electrical vehicle
forecasting method
Monte Carlo simulation; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59111803.pdf Link otwiera się w nowym oknie
Opis:: In order to deal with the threat of the randomness of large-scale electric vehicle (EV) loads to the safe and economic operation of the distribution network effectively, a forecasting method of EV loads based upon virtual prediction parameter estimation strategy is proposed. Firstly, an in-depth analysis is conducted to thoroughly examine the applicability and target audience of various existing power user load forecasting methods. This initial phase provided a solid foundation for the introduction of the new methods. Secondly, utilizing the Monte Carlo simulation method, a charging load forecasting approach that considers both spatial and temporal distribution is developed. This method effectively captures the diversity of EV charging behaviors by leveraging virtual parameter estimation, integrating insights from historical data into future load predictions, thereby enhancing forecasting accuracy. Finally, to validate the effectiveness of this groundbreaking approach, comprehensive testing was conducted on the MATLAB R2017a simulation platform. This verification phase not only serves to demonstrate the method’s accuracy, but also underscores its practicality and reliability in real-world applications.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Environmental themes in Chinese dance theater: experience and perspectives
Autorzy:: Baojiang, Feng
Tematy:: Chinese dance theater
Yang Liping
Wang Yuanyuan
Tong Ruirui
environmental protection; Pokaż więcej
Wydawca:: Wydawnictwo Adam Marszałek
Powiązania:: https://bibliotekanauki.pl/articles/60553997.pdf Link otwiera się w nowym oknie
Opis:: This article highlights the involvement of Chinese dance theater in environmental protection. The author analyzes the ecological concepts of the work of three outstanding Chinese choreographers Yang Liping, Wang Yuanyuan, Tong Ruirui, whose works consistently embody the idea of the development of beautiful China, the ecological balance between human and nature, and the humankind’s adaptation to the new conditions of urban digital civilization. The purpose of the study is to investigate the existing experience of implementing Environmental themes in Chinese dance theater, as well as to outline the role of the Chinese ballet theater in the development of environmental consciousness. The research materials were the following stage works: “Pilgrimage to Lhasa”, “Two trees”, “Fire”, “Daughter of the country”, “Spirit of the Peacock”, “Romantic peacock”, “Echoes of Shangrila”, “Dynamic Yunnan”, “The Spirit of the Birds” (director and choreographer Yang Liping); “Haze” (director and choreographer Wang Yuanyuan); “Deep Memory”, “The World of Flowers”, “Then”, “The Earth”, “Goddess of Luo River”; ecological trilogy “Soaring Wings: Journey of the Crested Ibis”, “The Origin of the Big River”, “Deep AI You” (director and choreographer Tong Ruirui). The conclusions summarize the main characteristics of studied artists’ performances on environmental themes, as well as outline the prospects for further promotion of environmental awareness by means of dance theater. According to the author, the dance theater of China can continue to participate in environmental protection actively. The following forms of work turned out to be the most promising: further staging of choreographic performances on ecological topics, ecological production of the plays, open-air performances in natural areas and parks, original dance events in rural areas, choreographic open-air master classes, access to eco-responsible dance productions in online format, participation of ballet dancers in complex activities (ecological festivals, environmental photo sessions, media-programs or performances etc.).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Study on leaching kinetics of laterite ore using hydrochloric acid
Autorzy:: Li, Jinhui
Xu, Zhifeng
Wang, Ruixiang
Gao, Yang
Yang, Yang
Tematy:: nickel laterite
hydrochloride acid
kinetics analysis
hydrometallurgy
leaching mechanism; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/110911.pdf Link otwiera się w nowym oknie
Opis:: The process of atmosphere-pressure acid leaching of laterites has attracted considerable attention in the nickel industry in recent years. However, the leaching kinetics of laterite using hydrochloride acid has not yet been fully researched. In this paper, the mineral analysis of the ore was carried out, and the leaching mechanism of different minerals at different time was studied comprehensively. The kinetics analysis of the leaching process of nickel, cobalt and manganese showed that the kinetics model of diffusion controlling was suitable and could be described by the linear equation, 1-3(1-a)2/3+2(1-a)=k2t. Based on the linear equation and the Arrhenius equation, the values of activation energy of metal leaching can be deduced (11.56 kJ/mol for nickel, 11.26 kJ/mol for cobalt and 10.77 kJ/mol for manganese). Study of leaching mechanism shows that the order of these minerals dissolution is: goethite, lizardite, magnetite and hematite. Due to the original or product of silica, magnetite, hematite and talc, they can form the solid film which hinders the leaching of valuable metals. Thus, the diffusion controlling step is inner diffusion, namely solid film diffusion controlling.
Dostawca treści:: Biblioteka Nauki

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