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494 results on '"Li, Yuqian"'

2. Adenylate kinase phosphate energy shuttle underlies energetic communication in flagellar axonemes

Author

Wu, Huan, Zhang, Yanman, Li, Yuqian, Sun, Shuya, Zhang, Jintao, Xie, Qingsong, Dong, Yue, Zhou, Shushu, Sha, Xuan, Li, Kuokuo, Chen, Jinyi, Zhang, Xin, Gao, Yang, Shen, Qunshan, Wang, Guanxiong, Zha, Xiaomin, Duan, Zongliu, Tang, Dongdong, Xu, Chuan, Geng, Hao, Lv, Mingrong, Xu, Yuping, Zhou, Ping, Wei, Zhaolian, Hua, Rong, Cao, Yunxia, Liu, Mingxi, and He, Xiaojin

Published
2024
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5. Dynamical Origin for the Collinder 132-Gulliver 21 Stream: A Mixture of three Co-Moving Populations with an Age Difference of 250 Myr

Author

Pang, Xiaoying, Li, Yuqian, Tang, Shih-Yun, Wang, Long, Wang, Yanshu, Li, Zhaoyu, Wang, Danchen, Kouwenhoven, M. B. N., and Pasquato, Mario

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We use Gaia DR3 data to study the Collinder 132-Gulliver 21 region via the machine learning algorithm StarGO, and find eight subgroups of stars (ASCC 32, Collinder 132 gp 1--6, Gulliver 21) located in close proximity. Three co-moving populations were identified among these eight subgroups: (i) a coeval 25 Myr-old moving group (Collinder 132); (ii) an intermediate-age (50--100 Myr) group; and (iii) the 275 Myr-old dissolving cluster Gulliver 21. These three populations form parallel diagonal stripe-shape over-densities in the U--V distribution, which differ from open clusters and stellar groups in the solar neighborhood. We name this kinematic structure the Collinder 132-Gulliver 21 stream, as it extends over 270 pc in the 3D space. The oldest population Gulliver21 is spatially surrounded by the Collinder 132 moving group and the intermediate-age group. Stars in the Collinder 132-Gulliver 21 stream have an age difference up to 250 Myr. Metallicity information shows a variation of 0.3 dex between the youngest and oldest populations. The formation of the Collinder132-Gulliver 21 stream involves both star formation and dynamical heating. The youngest population (Collinder 132 moving group) with homogeneous metallicity is probably formed through filamentary star formation. The intermediate-age and the oldest population were then scatted by the Galactic bar or spiral structure resonance to intercept Collinder 132's orbit. Without mutual interaction between each population, the three populations are flying by each other currently and will become distinct three groups again in approximately ~50Myr., Comment: Accepted to ApJL, 15 pages, 7 figures

Published
2022
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7. 3D Morphology of Open Clusters in the Solar Neighborhood with Gaia EDR3 II: Hierarchical Star Formation Revealed by Spatial and Kinematic Substructures

Author

Pang, Xiaoying, Tang, Shih-Yun, Li, Yuqian, Yu, Zeqiu, Wang, Long, Li, Jiayu, Li, Yezhang, Wang, Yifan, Wang, Yanshu, Zhang, Teng, Pasquato, Mario, and Kouwenhoven, M. B. N.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We identify members of 65 open clusters in the solar neighborhood using the machine-learning algorithm StarGO based on Gaia EDR3 data. After adding members of twenty clusters from previous studies (Pang et al. 2021a,b; Li et al. 2021) we obtain 85 clusters, and study their morphology and kinematics. We classify the substructures outside the tidal radius into four categories: filamentary (f1) and fractal (f2) for clusters $<100$ Myr, and halo (h) and tidal-tail (t) for clusters $>100$ Myr. The kinematical substructures of f1-type clusters are elongated; these resemble the disrupted cluster Group X. Kinematic tails are distinct in t-type clusters, especially Pleiades. We identify 29 hierarchical groups in four young regions (Alessi 20, IC 348, LP 2373, LP 2442); ten among these are new. The hierarchical groups form filament networks. Two regions (Alessi 20, LP 2373) exhibit global "orthogonal" expansion (stellar motion perpendicular to the filament), which might cause complete dispersal. Infalling-like flows (stellar motion along the filament) are found in UBC 31 and related hierarchical groups in the IC 348 region. Stellar groups in the LP 2442 region (LP 2442 gp 1-5) are spatially well-mixed but kinematically coherent. A merging process might be ongoing in the LP 2442 subgroups. For younger systems ($\lesssim30$ Myr), the mean axis ratio, cluster mass and half-mass radius tend to increase with age values. These correlations between structural parameters may imply two dynamical processes occurring in the hierarchical formation scenario in young stellar groups: (1) filament dissolution and (2) sub-group mergers., Comment: Accepted to ApJ, 33 pages, 14 figures. OC 3D interactive visualization included on http://3doc-morphology.lowell.edu

Published
2022
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18. Efficacy of Community-involved Hospice Care for Patients with Advanced Cancer: a Meta-analysis

Author

HU Jingyi, HONG Jing, GUO Xiaodong, ZHANG Xiaohong, MO Ning, ZHOU Xiaocui, YU Qin, ZHOU Minhua, SUN Yan, NI Liu, SHI Xiaoli, SU Xiaoqing, LI Yuqian

Subjects
hospice and palliative care nursing, oncology nursing, advanced cancer, community health services, intervention effect, quality of life, meta analysis, Medicine
Abstract

Background Community-based intervention is an important part of palliative care for advanced cancer patients. However, its role in the health management of advanced cancer patients remains to be supported by medical evidence. Objective To evaluate the efficacy of community-involved hospice care for patients with advanced cancer. Methods Wanfang Data Knowledge Service Platform, CNKI, VIP were searched by using Chinese keywords such as "community" "medical model" and "advanced cancer", Cochrane Library, PubMed and Web of Science were searched by using English keywords such as "Community-based" "Model of Palliative Care" "Advanced Cancer" "Quality of Life", to obtain randomized controlled trials (RCTs) related to the efficacy of community-involved hospice care from 2007-01-01 to 2022-05-10 by using Cochrane system evaluation method on 2022-05-22. The quality of RCTs meeting the inclusion criteria was evaluated, and the valid information was extracted for meta-analysis. Results A total of 11 RCTs in English and 9 RCTs in Chinese were included in the study, involving 2 356 and 1 238 patients, respectively. Meta-analysis showed that compared with routine cancer care, community-involved hospice care could improve quality of life and symptom severity in patients with advanced cancer, demonstrated by increasing Functional Assessment of Chronic Illness Therapy-Palliative Care scale socre〔MD (95%CI) =3.77 (0.83, 6.71) , P=0.01〕and Quality of Life Instruments for Cancer Patients scale total score〔MD (95%CI) =12.53 (2.36, 22.69) , P=0.02〕, reducing Functional Assessment of Cancer Therapy scale total score〔MD (95%CI) =-2.61 (-3.53, -1.70) , P

Published
2023
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24. Research on the Innovative Path of College Students’ Quality Training and Management in the Era of Big Data and Integrated Media

Author

Zhu, Hui, Li, Yuqian, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Hung, Jason C., editor, Yen, Neil Y., editor, and Chang, Jia-Wei, editor

Published
2023
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25. Student Management Online Education Platform Based on Artificial Intelligence Technology

Author

Li, Yuqian, Zhu, Hui, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Hung, Jason C., editor, Yen, Neil Y., editor, and Chang, Jia-Wei, editor

Published
2023
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37. Development of plasma light monitoring system for high-power radio frequency negative ion source

Author

LI Yufan, YANG Puqiong, WEI Jianglong, LIU Bo, PENG Xufeng, YANG Yuwen, LI Yuqian, and XIE Yuanlai

Subjects
negative ion source, neutral beam injection, plasma spectral diagnosis, photodiode, Nuclear engineering. Atomic power, TK9001-9401
Abstract

BackgroundNegative ion sources driven by radio frequency (RF) waves have become the preferred solution for future neutral beam injection systems.PurposeThis study aims to monitor the plasma discharge state of each exciter of a high power RF negative ion source by developing a plasma luminescence monitoring system based on a photodiode is designed and constructed.MethodsThe intensity of plasma emission was closely related to the number of specific collisions, collision particle density, and collision particle energy. Therefore, the intensity of plasma emission was applied to monitoring plasma parameters qualitatively, and a photodiode-based multichannel plasma luminescence monitoring system was designed and implemented to monitor the plasma discharge state of each exciter of a high power RF negative ion source. Based on a reasonable collision radiation model, plasma parameters were quantitatively obtained by analyzing the intensity of plasma characteristic spectral lines, and the influence of the filtering magnetic field generated by plasma current on plasma emission signals as experimental tested.ResultsExperimental results this monitoring system demonstrate that the real-time intensity information of plasma emission from different positions is successfully collected, and subsequently presented and saved in the form of voltage signals for real-time monitoring and post-data processing by the host computer. The intensity of plasma emission has a good linearity with RF discharge power.ConclusionsThe plasma light monitoring system of this study can accurately and real-time measure the excitation, maintenance, and extinction processes of plasma in the RF exciter.

Published
2024
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