Autor: Xu, Min - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Research on modeling method for digitizing distribution substation areas based on big data from smart meters
Autorzy:: Bai, Hao
Fu, Yu
Yang, Weichen
Li, Yue
Cai, Yongxiang
Xu, Min
Tematy:: digital model
low voltage distribution network
numerous measurement data
smart meters; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59111779.pdf Link otwiera się w nowym oknie
Opis:: With the wide application of smart meters, real-time data collection in power grid operation can be carried out in real time, which provides big data support for the digital modeling of distribution station areas. At the same time, the digital transformation of the distribution area can be promoted through the digital modeling of the distribution area. In this situation, how to use the big data of smart meters to achieve the digital modeling of the distribution area needs to be further studied. Firstly, this paper briefly introduces the connotation of digitalization in the distribution station area. At the same time, aiming at the digitalization of the distribution station area, it analyzes the digitalization of station features, user features, new energy features, network parameters and operation features, and obtains the digitalization model. Finally, on the basis of the above, select an application scenario to introduce the application of digitalization modeling. The research results can provide a reference for the combination of big data application of smart meters and digitalization of the distribution area, and help the digital transformation of the distribution area.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Photo-thermal Decomposition of HNS Surface by 532 nm Laser Irradiation : Spectral and Quantitative Analysis using In-Situ XPS- Quadrupole MS Technique
Autorzy:: Sun, Yi
Xu, Tao
Shui, Min
Tematy:: 2,2’,4,4’,6,6’-hexanitrostilbene
photo-thermal decomposition
laser
in-situ XPS
mass spectrometry; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/59115404.pdf Link otwiera się w nowym oknie
Opis:: A novel approach for studying the photo-thermal decomposition of HNS (2,2’,4,4’,6,6’-hexanitrostilbene) at 532 nm induced by a 10-nanosecond (ns) laser pulse is described. In this method, in-situ X-ray photoelectron spectrometer (XPS) - laser-quadrupole mass spectrometer on-line equipment was designed. New peaks at binding energies of 399.7 eV in the N 1s XPS spectrum and 288.6 eV in the C 1s spectrum showed that nitro-nitrite isomerization with subsequent release of NO occurs in the laser-induced decomposition of HNS. A new peak at 30 m/z in the mass spectrum is also associated with the mechanism of the nitro-nitrite isomerization of the HNS molecule, with subsequent release of NO. Quantum chemistry calculation results are in good agreement with the experimental results. We attribute this laser-induced decomposition as a photo-thermal decomposition for the high temperature rise due to the laser irradiation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Key-point Detection based Fast CU Decision for HEVC Intra Encoding
Autorzy:: Xu, Z.
Min, B.
Cheung, R. C. C.
Tematy:: HEVC
video coding
fast CU decision
corner detection; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/226128.pdf Link otwiera się w nowym oknie
Opis:: As the most recent video coding standard, High Efficiency Video Coding (HEVC) adopts various novel techniques, including a quad-tree based coding unit (CU) structure and additional angular modes used for intra encoding. These new techniques achieve a notable improvement in coding efficiency at the penalty of significant computational complexity increase. Thus, a fast HEVC coding algorithm is highly desirable. In this paper, we propose a fast intra CU decision algorithm for HEVC to reduce the coding complexity, mainly based on a key-point detection. A CU block is considered to have multiple gradients and is early split if corner points are detected inside the block. On the other hand, a CU block without corner points is treated to be terminated when its RD cost is also small according to statistics of the previous frames. The proposed fast algorithm achieves over 62% encoding time reduction with 3.66%, 2.82%, and 2.53% BD-Rate loss for Y, U, and V components, averagely. The experimental results show that the proposed method is efficient to fast decide CU size in HEVC intra coding, even though only static parameters are applied to all test sequences.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The Influence of Short-Term High Temperature Environment on the Non-Uniform Distribution of Ferrite Grain Size in 40 mm-thick Q345 Steel
Autorzy:: Xu, Hao
Gou, Rui-Bin
Yu, Min
Dan, Wen-Jiao
Wang, Nian
Tematy:: short-term high temperature environment
Q345 thick plate
microstructure
distribution model; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59226020.pdf Link otwiera się w nowym oknie
Opis:: In order to reveal the non-uniform distribution of grain size in thick direction for engineering heavy plate, microstructure of 40 mm-thick Q345 steel was observed and measured under different short-term high temperature environments formed by fire. Moreover, the influence of the short-term high temperature environment was revealed on the distribution of ferrite grain size in the Q345 steel. Under different fire service environments, there was a log-normal distribution relationship between the distribution parameter Nf (number of ferrite grains) and df (average grain diameter), as well as ρAf (area fraction density) and df, at different positions along the thickness direction. However, the statistical results are greatly affected by the length of the statistical interval. When df is about 4 to 6 times the length of the statistical interval, the statistical accuracy is higher. By using nonlinear fitting method, multiple non-uniform distribution empirical models including Nf-df empirical formulas and ρAf-df empirical formulas were established at different positions along thick direction under various fire environments. Furthermore, the interrelationships between fire temperature T and Nf, T and ρAf, fire duration t and Nf, t and ρAf were revealed, respectively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Strain-Hardening Prediction of DP600 Steel Considering the Heterogeneous Deformation Between Ferrite and Martensite
Autorzy:: Gou, Rui-Bin
Dan, Wen-Jiao
Xu, Yong-Sheng
Yu, Min
Li, Tong-Jie
Tematy:: strain-hardening model
DP600
GNDs
heterogeneous deformation
mechanical behaviors; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59110851.pdf Link otwiera się w nowym oknie
Opis:: Dual-phase steels have received extensive attention in autobody frame manufacturing due to the resulting characteristics of an interesting combination of ductile ferrite and hard martensite. Moreover, the ductile ferrite and hard martensite lead to heterogeneous deformation in the boundary between the two phases. Then, geometrically necessary dislocations (GNDs) are created to accommodate a lattice mismatch due to the deformation incompatibility of the boundary in straining. In this study, a new empirical GND model is developed, in which the GND density is a function of local plastic deformation; the GND density is distributed in the phase boundary in accordance with an “S” model of material plastic strain. The boundary conditions are applied to define the parameters. The proposed model is verified with DP600 steel. The effects of the GNDs and the width between ferrite and martensite on the strain hardening of DP600 steel are evaluated.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Model considering residual stiffness and stiffness discontinuity of bolted joints
Autorzy:: Wang, Sheng-Ao
Zhu, Min
Xu, Zi-Jian
Guo, Ming
Li, Biao
Wu, Fei
Tematy:: nonlinear dynamic behaviour
Iwan model
energy dissipation; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/2087050.pdf Link otwiera się w nowym oknie
Opis:: The nonlinear dynamic behavior has an important impact on energy dissipation and vibra- tion damping characteristics of bolted joints. Firstly, the development of tangential dynamic models is summarized and analyzed. Secondly, a five-parameter Iwan model based on a trun- cated power-law distribution is proposed. The backbone and hysteresis curves are obtained. Thirdly, normalized and dimensionless analysis is performed. On the basis of the above, a more concise four-parameter Iwan model with stiffness continuity is proposed. Finally, the validity of the model is verified by comparing the energy dissipation vs excitation force amplitude curve with the experimental data.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Facile Synthesis and Characterization of Novel CdS/BiOI Heterojunctions with Enhanced Visible-Light Photocatalytic Performances
Autorzy:: Fang, Shanshan
Lu, Min
Zhou, Man
Li, Zhongyu
Xu, Song
Peng, Yanyan
Li, Qinchi
Lu, Dayong
Tematy:: CdS/BiOI heterojunctions
visible-light photocatalyst
photocatalytic activity
nanocomposites; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1030343.pdf Link otwiera się w nowym oknie
Opis:: Novel CdS/BiOI heterojunction photocatalysts were successfully prepared by facile method. The as-prepared samples were characterized by transmission electron microscopy, field-emission scanning electron microscopy, X-ray diffraction, the Raman spectroscopy, UV-vis diffuse reflectance spectra, the Fourier transform infrared spectra, and photoluminescence. It was found that CdS nanoparticles were uniformly distributed on the surface of BiOI microspheres. The photodegradation tests showed that the photocatalytic efficiency was increased at first and then decreased when further increasing CdS content in the nanocomposites. The highest activity was obtained by 3%-CdS/BiOI nanocomposites. The enhanced photocatalytic performances were attributed to the matched band potentials of CdS and BiOI, which resulted in the efficient separation of photogenerated electron-hole pairs. Based on the experimental results, a reasonable photocatalytic mechanism of CdS/BiOI photocatalysts was also proposed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Factors influencing the mental health status of support nurses and their workload during the COVID-19 epidemic
Autorzy:: Dai, Zhen-Juan
Xu, Shen-Ting
Xue, Fang-Ying
Zhou, Jian-Ying
Chen, Jian-Qin
Wang, Xue-Min
Tematy:: COVID-19
mental health
epidemic prevention and control
general mental health questionnaire
NASA-TLX
support nurse; Pokaż więcej
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Powiązania:: https://bibliotekanauki.pl/articles/23369109.pdf Link otwiera się w nowym oknie
Opis:: Objectives The authors used the National Aeronautics and Space Administration Task Load Index (NASA-TLX) and general health questionnaire to analyze the factors influencing the mental health status and the workload of support nurses during the COVID-19 epidemic. Material and Methods The authors conducted a cross-sectional survey of 349 support nurses in April–October 2022. Using QuestionStar, a powerful online survey tool, the authors administered surveys to the participants, collected data on the mental health status and workload of support nurses, and analyzed the influencing factors based on the collected data. Results A total of 316 questionnaires were successfully collected, with an effective rate of 98.75%. The proportion of support nurses with mental health problems was 25% and the value of the NASA-TLX questionnaire was: M±SD 68.91±7.28 pts. Multi-factor analysis revealed that the number of children, family support, and nursing support location were the influencing factors of mental health status, while the multivariate analysis revealed that the presence of symptoms, nursing support location, support work type, and total 12-item General Health Questionnaire (GHQ-12) score were the influencing factors of the workload of support nurses. Conclusions Compared to their counterparts in the plains, nurses working in isolated plateau regions who were caring for children and lacked family support, were more likely to have mental health issues. There was a positive correlation between the changes in GHQ-12 and NASA-TLX scores of the study participants. Compared to their counterparts in the plains and the tropical regions, nurses working in plateau regions had a heavier workload. As part of the follow-up measures to prevent and treat patients impacted by the COVID-19 epidemic, it is important to improve the mental health evaluation, consultation, and treatment of the support nurses to guarantee the high quality of the first-line support work.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Constraints on axion dark matter by distributed intercity quantum sensors
Autorzy:: Wang, Yuanhong
Du, Jiangfeng
Peng, Xinhua
Kang, Xiang
Pustelny, Szymon
Jiang, Min
Xu, Jiaxuan
Chen, Yifan
Chang, Dangui
Zheng, Wenqiang
Huang, Ying
Opis:: Ultralight axion particles are candidates for dark matter, conjectured to form stable, macroscopic field configurations in three-dimensional space, resulting in the possible formation of topological defect dark matter (TDM). Exploring their possible existence through a realistic parameter space requires considering interactions that extend beyond the constraints imposed by astrophysical observations of stellar cooling processes. Here we report the outcome of an experiment that monitors possible transient rotations of polarized spins, which could be induced by the interaction with topological defects, carried out by correlating five noble-gas laboratory set-ups located in two cities. Amplification and optimal noise filtering in hyperpolarized noble-gas spins greatly enhance the sensitivity to TDM-induced spin rotations, reaching approximately 10$^{−6}$ rad. Through this, we set constraints on the axion–nucleon coupling across an axion mass range from 10 peV to 0.2 μeV, achieving 4.1 $\times$ 1010 GeV at 84 peV. These values exceed known constraints imposed by astrophysical observations, although these are obtained under different model assumptions. Our approach could further stimulate broad beyond-Standard Model physics searches, such as transient axion waves, axion stars, axion strings and Q-balls.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 10.

Tytuł:: Molecular rotor-based NIR-II TICTgens for mitochondria-targeted pyroptosis induction and multi-model monitoring of cancer immunotherapy
Autorzy:: Zhu, Zifan
Yu, Haijun
Bajda, Marek
Xie, Yaxiong
Gao, Jing
Yar, Muhammad
Li, Min
Lai, Yi
Li, Ming
Xu, Zhiai
Wang, Feng
Huang, Lujia
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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