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Chinese Journal of Chemistry 2023年第21期41卷 2825-2831页

作者： Ying Chen Meng Zang weije Wang Yang-zi liu Xiaoyan Luo wei-Ping Deng Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism School of PharmacyEast China University of Science and TechnologyShanghai 200237China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiangNormal UniversityJinhuaZhejiang 321004China

We developed a novel Pd-catalyzed[4+4]cycloaddition of(benzo)furan-derived azadienes with homo-TMM all-carbon 1,4-dipoles in situ generated fromα-allyl malonate derivatives,affording an array of benzofuro[3,2-b]azocines and furo[3,2-b]azocines with good to excellent yields(up to 96%)and exclusive *** methodology featured mild reaction conditions and good functional group *** synthetic utility was demonstrated by a gram-scale ***,the catalytic asymmetric[4+4]cycloaddition version has also been explored.

关键词： Pd-catalyzed [4+4]cycloaddition Homo-TMM 1,4-dipoles Methodology and reactions Medium-ring compounds Regioselectivity

Core competencies and perceived training needs of nurses in the background of Internet plus nursing service:a qualitative descriptive study

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Frontiers of Nursing 2024年第2期11卷 181-190页

作者： Qiang-Hui-zi Zhang wei-wei liu Zhen-Zhen Cheng School of Nursing Capital Medical UniversityBeijing 100069China Department of Orthopedics Peking University Shougang HospitalBeijing 100043China

Background:The Internet plus nursing service program is being piloted in China,which has become a new home nursing service model led by *** enable safe and effective homecare service delivery,nurses working in the program need a high level of ***,the content of these core competencies and the training needs of nurses for Internet plus nursing services are still ***:To describe nurses’perceptions of core competencies and training needs to work in the Internet plus nursing service program,thereby providing a reference for the development of training ***:A qualitative descriptive study using semi-structured interviews was conducted on 15 nurses with experience of working in the Internet plus nursing service *** were audio-recorded and transcribed verbatim,and the data were analyzed using thematic ***:Core competencies involved comprehensive assessment competence,direct care practice competence,health education and consulting competence,risk estimation and response competence,and communication *** needs involved complex operational items,knowledge of chronic disease management,professional communication,risk identification and response,nursing standards,norms,and procedures,and utilization of information ***:The training system may be developed based on nurses’core competencies and their training needs to promote professional development of the Internet plus nursing service.

关键词： core competence Internet plus nursing service nursing qualitative study training needs

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初治结核病患者自噬相关基因表达水平的研究

中国防痨杂志 2017年第1期39卷 82-85页

作者：吕子征王伟刘京铭李传友高孟秋首都医科大学附属北京胸科医院细菌免疫室 101149 首都医科大学附属北京胸科医院结核科 101149

目的研究初治结核病患者自噬相关基因表达水平。方法选取2013年12月至2016年3月在首都医科大学附属北京胸科医院就诊的12例初治肺结核病患者作为病例组；选取首都医科大学附属北京胸科医院体检健康的新入职职工和在读学生12名作为对照... 详细信息

目的研究初治结核病患者自噬相关基因表达水平。方法选取2013年12月至2016年3月在首都医科大学附属北京胸科医院就诊的12例初治肺结核病患者作为病例组；选取首都医科大学附属北京胸科医院体检健康的新入职职工和在读学生12名作为对照组。收集研究对象外周血，提取RNA，将RNA逆转录为cDNA，进行实时定量PCR。使用H37Rv标准株感染人外周血单核细胞（THP-1细胞）作为感染组，而未感染H37Rv标准株的THP1细胞作为未感染组，分别在感染4h和6h使用Trizol法提取RNA，将RNA逆转录为cDNA，进行实时定量PCR检测。实时定量PCR检测使用p肌动蛋白（β-actin）作为内参基因，测量各个基因的循环阈值（cyclethreshold，Ct），并计算各个基因的ACt值。不同样品同一基因的检测通过计算两者之间的ACt值差值，使用2-△△Ct比较基因之间的表达水平。结果病例组Ras蛋白脑组织同源类似物（Rheb）基因ACt值为8．71±0．58，对照组△Ct值为7．83±0．58，两组相比差异有统计学意义（t=3．74，P=0．001）；病例组Rheb基因表达下调。病例组哺乳动物雷帕霉素靶蛋白（mTOR）基因△Ct值为11．88±0．97，对照组ACt值为10．81±1．04，两组相比差异有统计学意义（t=2．60，P=0．016）；病例组roTOR基因表达下调。使用-△△Ct法比较两组间自噬相关基因表达倍数关系，对照组Rheb基因表达水平是病例组的（1.85±0．91）倍；对照组roTOR基因表达水平是病例组的（2．76±1．56）倍。H37Rv标准株感染THP-1细胞6h后，感染组自噬相关蛋白LC3B基因△Ct值为6．41±0．15，未感染组△Ct值为7．04±0．05，两组相比差异有统计学意义（t=4．50，P=0．046）；感染组表达上调。感染组roTOR基因△Ct值为8．73±0．16，对照组△Ct值为10．10±0．20，两组相比差异有统计学意义（t=4．79，P=0．041），感染组表达上调。结论初治结核病患者患病后Rheb和mTOR基因表达下调，调节细胞的自噬；而H37Rv标准株感染THP-1细胞6h后LC3B和mTOR基因表达上调，调节细胞自噬水平。

关键词：分枝杆菌,结核自噬基因表达免疫

RFID unreliable data filtering by integrating adaptive sliding Window and Euclidean distance

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Advances in Manufacturing 2014年第2期2卷 121-129页

作者： Li-Lan liu zi-Long Yuan Xue-wei liu Cheng Chen Ke-Sheng Wang Shanghai Key Laboratory of Intelligent Manufacturing and Robotics Shanghai University Department of Production and Quality Engineering Norwegian University of Science and TechnologyTrondheimNorway

Through improving the redundant data filtering of unreliable data filter for radio frequency identification（RFID） with sliding-window,a data filter which integrates self-adaptive sliding-window and Euclidean distance is *** input data required being filtered have been shunt by considering a large number of redundant data existing in the unreliable data for RFID and the redundant data in RFID are the main filtering object with utilizing the filter based on Euclidean *** comparison between the results from the method proposed in this paper and previous research shows that it can improve the accuracy of the RFID for unreliable data filtering and largely reduce the redundant reading rate.

关键词： Radio frequency identification(RFID) Adaptive sliding window Euclidean distance Redundant data

Study of thermal decoherence of harmonic oscillators

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原子与分子物理学报 2025年第5期42卷 108-114页

作者： LI Jian ZHOU Gao-Liang YAN Zheng-Xin liu wei WANG Zhao-Qi College of Science Xi’an University of Science and TechnologyXi’an 710054China

The thermal decoherence of harmonic oscillators is investigated *** quantum system presented here is a one-dimensional oscillator with angular frequency,which is surrounded by a thermal bath of environmental *** are various environmental oscillators with different angular frequency(below an ultraviolet cutoff).At the beginning,the quantum system is a pure state and the environmental oscillators are in thermodynamic equilibrium with *** a period,the system-environment interactions inspire significant decoherence of the quantum *** decoherence is displayed by explicit calculations of the purity and von Neumann entropy of the quantum *** is worth noting that the decoherence could be significant even in the weak coupling and low temperature case due to the large amount of environmental degrees of *** the decoherence process is inspired between the quantum system and an ordinary thermal environment here,the thermal decoherence result is quite general.

关键词： Quantum decoherence Grand canonical ensemble Oscillators

Free-radical evolution and decay in cross-linked polytetrafluoroethylene irradiated by gamma-rays

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Nuclear Science and Techniques 2022年第5期33卷 113-125页

作者： Fei-Xiang Sha Guo-Jun Cheng zi-Yue Xuan Yang liu wei-Hua liu Xiao-Dong Zhang Zhong-Feng Tang School of Materials Science and Engineering Anhui University of Science and TechnologyHuainan 232000China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment Harbin Institute of TechnologyHarbin 150001China University of Chinese Academy of Sciences Beijing 100049China

Electron spin resonance techniques were employed to investigate the effects of the absorbed dose and post-irradiation conditions on the evolution and decay of free-radicals in cross-linked polytetrafluoroethylene(XPTFE),induced byγ-ray ***-end free-radicals,chain alkyl free-radicals,and tertiary alkyl free-radicals were detected when XPTFE was irradiated under Ar *** corresponding peroxy free-radicals were formed upon exposure of irradiated XPTFE to air;the freeradicals concentration first increased linearly with increasing absorbed dose and then gradually *** free-radicals yield under air atmosphere was greater than that under Ar,and the peroxy free-radicals were preserved for a relatively long time when irradiated XPTFE was stored under air *** chain alkyl free-radicals may be converted to chain end free-radicals byβ-scission,while chain end free-radicals are more sensitive to oxygen than chain alkyl *** the annealing temperature was raised above the a-transition temperature of XPTFE,the decay of the free-radicals was greatly affected and accelerated by the motion of the molecules over the long range.

关键词： Polytetrafluoroethylene Cross-linked polytetrafluoroethylene Electron spinresonance Decay Radiation c-ray

Synthesis and Characterization of Tungsten Doped Vanadium Dioxide Nanopowders by Thermolysis

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Chinese Chemical Letters 2006年第10期17卷 1417-1420页

作者： zi Fei PENG wei JIANG Department of Chemistry Shanghai Normal University Shanghai 200234

As far as we known, with white powdery tungstic acid （WPTA） used as the dopant for the first time, tungsten-doped vanadium dioxide （VO2） nanopowders were synthesized through thermolysis at low temperature. The products were characterized by XRD, TEM and DSC. When WPTA was added into V205 （with W/V = 2 atom %）, the phase transition temperature （Tc） of VO2 decreased markedly from 67.15℃ to 26.46℃ after annealing at 500℃. Such a low Tc is beneficial to the application and development of smart windows materials.

关键词： Vanadium dioxide white powdery tungstic acid phase transition thermolysis

Metastable magnetic behavior in La_(0.9)Tb_(0.1)MnO_3

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Rare Metals 2017年第7期36卷 596-600页

作者： wei-Bin liu Ying-Tang Zhang zi-Yu Chen Li-Zhu liu Sheng-Tao Li Tao-Tao Ai Department of Physics Beijing University of Aeronautics and Astronautics School of Material Science and Engineering Institute of Functional MaterialShaanxi University of Technology Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University

The linear and nonlinear magnetizations of La0.9Tb0.1MnO3 at low temperatures were reported in de- tail. The temperature dependence of magnetization shows peaks at 50, 100 and 150 K, respectively. When LaMnO3 is Tb-doped, its magnetic structure exhibits a canted an- tiparallel spin order. This is different from classical antiferromagnetic （AFM） in which the relaxation behavior takes place at about 150 K. At 50 K, Tb-doped LaMnO3 exhibits canonical spin glass behavior, arising from the competition of exchange and super-exchange between spins. The peak at 100 K shows neither spin glass behavior nor canted AFM behavior. Its peak value increases with frequency increasing, and the transition temperature of the peak shifts to higher temperatures with frequency increasing. The study of aging behavior at 100 K shows a periodical variable metastability, which is ascribed to the competition between ferromagnetic （FM）-, AFM- and sinusoidal-order interactions. This work should shed a light on understanding the complex magnetic structure of the perovskite oxides.

关键词： La0.9Tb0.1MnO3 Relaxation behavior Metastability

Hunting problems of multi-quadrotor systems via bearing-based hybrid protocols with hierarchical network

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Chinese Physics B 2020年第5期29卷 194-202页

作者： Zhen Xu Xin-Zhi liu Qing-wei Chen zi-Xing Wu School of Automation Nanjing University of Science and TechnologyNanjing 210094China Department of Applied Mathematics University of WaterlooWaterloo N2L 3G1Canada

Bearing-based hunting protocols commonly adopt a leaderless consensus method,which requests an entire state of the target for each agent and ignores the necessity of collision *** investigate a hunting problem of multi-quadrotor systems with hybrid bearing protocols,where the quadrotor systems are divided into master and slave groups for reducing the onboard loads and collision *** masters obtain the entire state of the target,whose hybrid protocols are based on the displacement and bearing constraints to maintain formation and to avoid the collision in the hunting ***,the slaves’protocols merely depend on the part state of the masters to reduce loads of data *** also investigate the feasibility of receiving the bearing state from machine *** simulation results are given to illustrate the effectiveness of the proposed hybrid bearing protocols.

关键词： hunting problem multi-quadrotor system bearing constraint hierarchical network

Rh-Cu alloy nano-dendrites with enhanced electrocatalytic ethanol oxidation activity

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Journal of Energy Chemistry 2023年第7期82卷 343-349,I0008页

作者： Di liu Zhejiaji Zhu Jiani Li Li-wei Chen Hui-zi Huang Xiao-Ting Jing An-Xiang Yin Ministry of Education Key Laboratory of Cluster Science Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsAdvanced Technology Research Institute(Jinan)School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

The application of direct ethanol fuel cell(DEFC)has been bottlenecked by the sluggish ethanol oxidation reaction(EOR).Efficient electrocatalysts for the C-C bond cleavage are essential to promote EOR with high efficiency and C1 ***,we prepared Rh-Cu alloy nano-dendrites(RhCu NDs)with abundant surface steps through controlled co-reduction,which exhibited significantly enhanced activity and C1 selectivity(0.47 m A cm_((ECSA))^(-2),472.4 mA mg_(Rh)^(-1),and 38.9%)than Rh NDs(0.32 mA cm((ECSA))-2,322.1 mA mgRh-1,and 21.4%)and commercially available Rh/C(0.18 mA cm_((ECSA))^(-2),265.4 mA mg_(Rh)^(-1),and 14.9%).Theoretical calculations and CO-stripping experiments revealed that alloying with Cu could modulate the surface electronic structures of Rh to resist CO-poisoning while strengthening ethanol *** situ Fourier transform infrared spectroscopy(FTIR)indicated that the surface steps on RhCu NDs further promoted the C-C bond cleavage to increase the C1 ***,optimizing the surface geometric and electronic structures of nanocrystals by rational composition and morphology control can provide a promising strategy for developing practical DEFC devices.

关键词： Rh-Cu alloy Nano-dendrites Electrocatalysis Ethanol oxidation reaction In situ FTIR