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Learning group interaction for sports video understanding from a perspective of athlete

Frontiers of Computer Science 2024年第4期18卷 175-188页

作者： Rui HE Zehua FU qingjie liu Yunhong WANG Xunxun CHEN Intelligent Recognition and Image Processing(IRIP)Lab School of Computer Science and EngineeringBeihang UniversityBeijing 100191China Hangzhou Innovation Institute Behang UniversityHangzhou 310051China National Computer Network Emergency Response Technical Team/Coordination Center of China(CNCERT or CNCERT/CC) Beijing 100029China

Learning activities interactions between small groups is a key step in understanding team sports *** research focusing on team sports videos can be strictly regarded from the perspective of the audience rather than the *** team sports videos such as volleyball and basketball videos,there are plenty of intra-team and inter-team *** this paper,a new task named Group Scene Graph Generation is introduced to better understand intra-team relations and inter-team relations in sports *** tackle this problem,a novel Hierarchical Relation Network is *** all players in a video are finely divided into two teams,the feature of the two teams’activities and interactions will be enhanced by Graph Convolutional Networks,which are finally recognized to generate Group Scene *** evaluation,built on Volleyball dataset with additional 9660 team activity labels,a Volleyball+dataset is proposed.A baseline is set for better comparison and our experimental results demonstrate the effectiveness of our ***,the idea of our method can be directly utilized in another video-based task,Group Activity *** show the priority of our method and display the link between the two ***,from the athlete’s view,we elaborately present an interpretation that shows how to utilize Group Scene Graph to analyze teams’activities and provide professional gaming suggestions.

关键词： group scene graph group activity recognition scene graph generation graph convolutional network sports video understanding

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Role of bioinformatics databases and tools in radiation biology

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Radiation Medicine and Protection 2024年第3期5卷 165-169页

作者： Yizhe Gao qingjie liu China CDC Key Laboratory of Radiological Protection and Nuclear Emergency National Institute for Radiological ProtectionChinese Center for Disease Control and PreventionBeijing100088China

Bioinformatics has become increasingly integral to radiation biology,also known as radiobiology,providing substantial support through data storage,conversion,visualization,and *** review aims to deepen understanding of bioinformatics application in radiobiology by introducing key databases and analytical tools in radiobiology,including general bioinformatics databases,radiobiology-specific databases,data processing tools,and statistical analysis tools for differentially expressed genes(DEGs)and LC/MS *** review also discusses bioinformatics applications in radiobiological fields,such as radioresistance and immune cell *** these advances,challenges such as data interoperability *** and projects to address these issues,such as GeCo and GMQL,are also examined.

关键词： Radiobiology Bioinformatics Radioresistance Immune cell enrichment

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阿司匹林抵抗和脂蛋白相关磷脂酶A2与复发性缺血性脑卒中的相关性分析

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中国实用神经疾病杂志 2025年第1期28卷 83-87页

作者：刘庆杰杨璨宇查文文永城市人民医院河南永城476600 郑州大学第一临床医学院河南郑州450052

目的探讨非心源性卒中患者阿司匹林抵抗和脂蛋白相关磷脂酶A2(Lp-PLA2)与缺血性脑卒中复发的相关性。方法选取2021-10—2022-10在永城市人民医院住院的发病7 d内的急性非心源性缺血性脑卒中患者72例,基于临床病史和神经影像学证据分为... 详细信息

目的探讨非心源性卒中患者阿司匹林抵抗和脂蛋白相关磷脂酶A2(Lp-PLA2)与缺血性脑卒中复发的相关性。方法选取2021-10—2022-10在永城市人民医院住院的发病7 d内的急性非心源性缺血性脑卒中患者72例,基于临床病史和神经影像学证据分为初发组(n=36)和复发组(n=36),入院后规律服用阿司匹林7 d。采用血栓弹力图测定阿司匹林抵抗,并测定血清Lp-PLA2水平。比较初发组和复发组阿司匹林抵抗、Lp-PLA2水平,分析阿司匹林抵抗、Lp-PLA2与缺血性脑卒中复发之间的相关性。采用多元Logistic回归分析筛选复发性卒中独立危险因素,ROC曲线下面积评价相关危险因素的预测价值。结果36.1%的复发性卒中患者存在阿司匹林抵抗,19.4%的初发患者存在阿司匹林抵抗,2组比较差异有统计学意义(P<0.001)。复发性卒中患者血清PLA2水平中位数160.0μg/L,初次发病患者为125.0μg/L,2组比较差异有统计学意义(P=0.008)。多元Logistic回归分析显示阿司匹林抵抗和高PLA2水平是复发性缺血性脑卒中的影响因素,阿司匹林抵抗患者卒中复发风险增加4.06倍(P=0.042),高于Lp-PLA2中位值患者的4.37倍(P=0.011)。阿司匹林抵抗和Lp-PLA2预测卒中复发的ROC曲线下面积分别为0.753(95%CI:0.641~0.873)和0.683(95%CI:0.559~0.807)。结论与初发卒中患者相比,复发性卒中患者阿司匹林抵抗的比率和血清Lp-PLA2水平均明显升高,可作为复发性卒中的预测因素。

关键词：复发性缺血性脑卒中阿司匹林抵抗血栓弹力图脂蛋白相关磷脂酶A2 血清

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Synthesis and Evaluation of Photophysical Properties of C-3 Halogenated Derivatives of 2-Phenylimidazo[1,2-a]pyridine

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Chinese Journal of Chemistry 2022年第19期40卷 2313-2328页

作者： Hong Chen Yanyan Wang qingjie liu Yanchun Guo Shuxia Cao Yufen Zhao College of Chemistry Zhengzhou UniversityZhengzhouHenan450001 China Institute of Drug Discovery Technology Ningbo UniversityNingboZhejiang315211 China

A CuX-mediated regioselective halogenation reaction of 2-phenylimidazo[1,2-a]pyridine in the presence of oxygen is introduced in this *** reaction provides an effective method for the production of C-3 halogenated 2-phenylimidazo[1,2-a]pyridines with a yield of up to 96%.A plausible mechanism for the formation of title compounds via 2-phenylimidazo[1,2-a]pyridine–CuX complex intermediate is *** structure of representative compounds is established by the single crystal XRD *** electronic structure,corroborated by Hirshfeld surface analysis and DFT calculations,rationalizes characters of relevant absorptions and emission as well as large Stokes shifts.

关键词： Imidazole[1,2-a]lpyridine Halogenation Cuprous halide DFT calculations Photophysical properties

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Experimental study of CO_(2) storage in water-flooded oilfields

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Petroleum Research 2017年第4期2卷 378-382页

作者： Zubo Zhang Xu Chen Yuchen Qian qingjie liu Weifeng Lv Manli Luo Xiliang Fan State Key Laboratory of Enhanced Oil Recovery PetroChina Research Institute of Petroleum Exploration and DevelopmentBeijing 100083China Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China China University of Petroleum Beijing 102249China

CO_(2) is the main source of greenhouse emission,and the environment problem caused by greenhouse effect has drawn worldwide *** most oilfields in China,a method of waterflooding is usually used to enhance oil recovery,which is favorable to carry out CO_(2) injection *** CO_(2) injection in the water-flooded oilfields can not only store CO_(2),but also enhance the oil *** this article,the coreflooding tests with refined oil were conducted to investigate CO_(2) displacement characteristic in watersaturated formation under different injection rate and water-flooded oil reservoir under different formation pressure and oil saturation,then the CO_(2) storage capacity was *** testing result shows that the displacement efficiency increases with the rise of the CO_(2) injection rate,and the CO_(2) injection can enhance the oil recovery about 15%OOIP under the experimental *** injecting CO_(2) after the waterflooding,the CO_(2) storage capacity increases as the rise of the formation *** core-flooding tests also indicate that when the initial oil saturation of reservoir prior CO_(2) injection is higher,the oil recovery will be higher when injecting the same pore volume(PV)of CO_(2),and the CO_(2) storage capacity will be larger.

关键词： reservoir saturation refined

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Research on global change scientific satellites

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Science China Earth Sciences 2014年第1期57卷 204-215页

作者： GUO HuaDong FU WenXue LI XinWu CHEN Pei liu Guang LI Zhen WANG Cheng DONG Qing LEI LiPing BAI LinYan liu qingjie Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences School of Astronautics Beijing University of Aeronautics & Astronautics

Global change now poses a severe threat to the survival and development of ***-scale,real-time,highly accurate Earth observation from space has become a key technology used to observe global *** is one of the most influential countries affecting and being affected by global change,yet it has no scientific satellite for global change research so *** global change scientific satellites not only would meet an important demand of China,but also would be a valuable contribution to the *** analyzing the mechanisms of space-based observation of variables sensitive to global change,this paper explores the concept of global change scientific satellites,and proposes a series of global change scientific satellites to establish a scientific observation system for global environmental change monitoring from space.

关键词： global change sensitive variables Earth observation scientific satellite

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The Research Progress on Assessment and Reduction of Ground-Borne Vibrations Induced by Railway Traffic

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Journal of Civil Engineering and Architecture 2010年第5期4卷 60-70页

作者： Xiaoyan Lei qingjie liu Qingsong Feng Andrey P. Khomenko Department of Civil Engineering East China Jiaotong University Nanchang 330013 China Irkutsk State Transportation University Irkutsk 664074 Russian

Railway induced vibrations and noises are a growing matter of environmental concern. The rapid development of transportation and increases in vehicle speeds and vehicle weights have resulted in higher vibration and noise levels. In the meantime vibrations and noises that seem to have been tolerated in the past, are now more often considered to be a nuisance. Methodology of assessing ground-borne vibrations for railway traffic is presented based on the Federal Railway Administration （FRA） Guidance Manual-High-Speed Ground Transportation Noise and Vibration Impact Assessment. Effectiveness of wave barriers such as open trench, in-filled trench, and piers for reduction of vibrations induced by railways and the procedure for barrier selection are discussed. Finally, an example of vibration assessing of Suvarnabhumi Airport Rail Link is presented to demonstrate the methodology.

关键词： Vibration assessing wave barrier railway ground-borne vibration.

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“丝绸之路经济带”背景下新疆与欧亚经济联盟贸易潜力实证研究

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经济地理 2018年第4期38卷 65-72页

作者：刘倩刘清杰刘敏北京师范大学新兴市场研究院

新疆维吾尔自治区是我国“一带一路”倡议中的核心区域，也是贯通欧亚大陆的重要的交通枢纽和商贸物流中心。其独特的区位优势将成为向西开放、深化与欧亚国家贸易合作的重要的窗口。文章采用面板数据的引力模型进行实证分析，并测算了... 详细信息

新疆维吾尔自治区是我国“一带一路”倡议中的核心区域，也是贯通欧亚大陆的重要的交通枢纽和商贸物流中心。其独特的区位优势将成为向西开放、深化与欧亚国家贸易合作的重要的窗口。文章采用面板数据的引力模型进行实证分析，并测算了新疆与欧亚经济联盟贸易潜力，发现新疆与亚美尼亚贸易潜力增长空间较大；俄罗斯和白俄罗斯与新疆贸易具有较大潜力且提升空间巨大；新疆与哈萨克斯坦贸易潜力仍然具有提升空间；而新疆与吉尔吉斯斯坦贸易潜力有限。通过实证研究结论，文章提出改变新疆经济发展方式，兼顾与中亚和独联体国家的贸易合作，以及优先发展交通基础设施建设三方面政策建议。

关键词： “一带一路”倡议贸易潜力引力模型丝绸之路经济带欧亚经济联盟新疆

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辐射敏感基因表达分析用于生物剂量估算的研究进展

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中华放射医学与防护杂志 2024年第8期44卷 704-710页

作者：李爽刘青杰中国疾病预防控制中心辐射防护与核安全医学所、辐射防护与核应急中国疾病预防控制中心重点实验室北京100088

在发生大规模核与辐射突发事故后,辐射剂量的准确评估为后续急性放射损伤的医学救治和预后判断提供重要的科学依据。近年来,辐射敏感基因表达分析凭借其快速和高通量的优点,被认为是一种适用于较大人群剂量分类和临床风险预测的有效方... 详细信息

在发生大规模核与辐射突发事故后,辐射剂量的准确评估为后续急性放射损伤的医学救治和预后判断提供重要的科学依据。近年来,辐射敏感基因表达分析凭借其快速和高通量的优点,被认为是一种适用于较大人群剂量分类和临床风险预测的有效方法。本文将对辐射敏感基因表达分析用于生物剂量估算的研究进展进行综述,以期促进该项技术在国内的推广应用,进而提高我国生物剂量估算能力。

关键词：电离辐射基因表达生物剂量计剂量估算

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Fluidization in combined acoustic-magnetic field for mixtures of ultrafine particles

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Particuology 2007年第Z1期 111-115页

作者： Huie liu, qingjie Guo State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Dongying 257061, Shandong, China

Four kinds of SiO2 (5–10 nm) + Fe3O4 (44.8 m) particle were fluidized in a sole acoustic field, a sole magnetic field and a combined acoustic-magnetic field. Introduction of a single field, 100 dB/40–60 Hz acoustic or 10 mT magnetic, could suppress plugging and channeling and reduce the superficial minimum fluidization gas velocities, Umf. Combination of both acoustic and magnetic fields demonstrated even more promising results, especially more significant reduction of Umf.

关键词： Ultrafine particle Combined acoustic-magnetic field Acoustic field Magnetic field

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