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社区跌倒风险老年人主动身体活动影响因素的质性研究

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护理学杂志 2025年第3期40卷 12-15+29页

作者：潘菲李娜叶明俊杨如美南京医科大学第二附属医院护理部南京医科大学护理学院南京医科大学第二附属医院全科医学科

目的探讨社区跌倒风险老年人主动身体活动的影响因素，以期为医护人员构建主动身体活动干预方案促进老年人主动健康提供参考。方法以COM-B模型为基础，通过目的抽样法选取有跌倒风险的社区老年人16人作为访谈对象，采用描述性质性研... 详细信息

目的探讨社区跌倒风险老年人主动身体活动的影响因素，以期为医护人员构建主动身体活动干预方案促进老年人主动健康提供参考。方法以COM-B模型为基础，通过目的抽样法选取有跌倒风险的社区老年人16人作为访谈对象，采用描述性质性研究方法，对访谈对象进行半结构式访谈，根据内容分析法对资料进行分析，提炼主题。结果共提炼出3个主题和6个亚主题，即能力因素(身体能力，心理能力)、机会因素(外部环境、科技产品构成的物理机会，来自于祖辈教育、同伴效应的社会机会)、动机因素(自发动机来源于获益健康、感受快乐，疾病触发、负性事件为主动身体活动的反思动机)。结论社区跌倒风险老年人主动身体活动动机仍有待提升，提升身体活动与心理能力是促进老年人主动身体活动的前提和基础，需要为其创造更多主动身体活动的机会和环境，以促进老年人主动身体活动，提升身心健康。

关键词：老年人跌倒主动活动身体活动 COM-B模型反思动机社会机会质性研究

Convergence Analysis of Splitting-Up Algorithm of the Zakai’s Equation with Correlated Noises

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Journal of Systems Science & Complexity 2023年第3期36卷 922-946页

作者： LUO xue pan Ting DONG Wenhui School of Mathematical Sciences Beihang University(Shahe Campus)Beijing 102206China Key Laboratory of Mathematics Informatics and Behavioral Semantics(LMIB)Beihang UniversityBeijing 100191China School of Mathematics and Statistics Shaanxi Normal UniversityXi’an 710119China

In the field of nonlinear filtering(NLF),it is well-known that the unnormalized conditional density of the states satisfies the Zakai’s *** splitting-up algorithm has been first studied in the independent noises case by Bensoussan,et al.(1990).In this paper,the authors extend this convergence analysis of the splitting-up algorithm to the correlated noises’*** a time discretization,one splits the solution of the Zakai’s equation into two interlacing processes(with possibly computational advantage).These two processes correspond respectively to the prediction and *** certain conditions,the authors show that both processes tend to the solution of the Zakai’s equation,as the time step goes to *** authors specify the conditions imposed on the way of splitting-up to guarantee the *** major technical difficulty in the correlated noises’case,compared with the independent case,is to control the gradient of the second process in some *** illustrate the potentially computational advantage of the schemes based on the splitting-up ways,the authors experiment on a toy NLF model using the feedback particle filter(FPF)developed based on the splitting-up method and the sampling importance and resampling(SIR)as *** FPF outperforms in both accuracy and efficiency.

关键词： Convergence analysis correlated noises nonlinear filtering splitting-up algorithm

Supnorm Estimates for ā on Product Domains in C^(n)

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Acta Mathematica Sinica,English Series 2024年第10期40卷 2307-2323页

作者： Martino FASSINA Yi fei pan Department of Mathematics University of Illinois at Urbana-Champaign1409 West Green StreetUrbanaIL 61801USA Department of Mathematical Sciences Purdue University Fort Wayne2101 East Coliseum BoulevardFort WayneIN 46805USA

Using methods from complex analysis in one variable,we define an integral operator that solves ā with supnorm estimates on product domains in C^(n).

关键词： Supnorm estimates product domains Cauchy Riemann equation

Semi-Global Stabilization via Homogeneous Output Feedback for a Class of Nonlinear Time-Delay Systems

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Journal of Systems Science & Complexity 2016年第6期29卷 1538-1552页

作者： WANG pan CHAI Lin fei Shumin Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education School of Automation Southeast University

The semi-global stabilization problem for a class of nonlinear systems with state time-delay is addressed in this paper. By using Lyapunov-Krasovskii functional method and homogeneous dom- ination approach, a homogeneous observer and an output feedback controller with a scaling gain are designed. Then the sealing gain is adjusted such that the closed-loop system is semi-global asymptoti- cally stable. A numerical example is presented to illustrate the effectiveness of the obtained results in this paper.

关键词： Homogeneous domination approach Lyapunov-Krasovskii functional nonlinear time-delay systems output feedback semi-global.

Microstructure and creep properties of high Cr resisting weld metal alloyed with Co

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第10期11卷 756-760页

作者： xue WANG Liang-fei ZHAN Qian-gang pan Zhi-jun LIU Hong LIU Yong-shun TAO School of Power and Mechanical Engineering Wuhan University Wuhan 430072 China DongFang Boiler Group Co. Ltd. Zigong 643001 China

A 9% Cr ferritic steel weld metal containing 1% Co, partially substituted for nickel, was prepared by submerged arc welding (SAW) processing. The microstructure and creep properties of the weld metal were investigated. The microstructure exhibited a fully tempered martensitic structure free of δ-ferrite. The creep properties of the obtained weld metal were inferior to those of the P92 base metal at 600 and 650 °C. The values of A and n for weld metal in the Norton power law constitution at 650 °C are 1.1×10?21 and 8.1, respectively.

关键词： 9Cr steels Weld metal Microstructure Creep properties

建设健康社会的催化剂:健康社会工作者与全科医生在基层的合作

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中国全科医学 2025年第4期28卷 516-520页

作者：李奕桦赵艾杨曾飞方雪张旺王欣武汉大学中南医院创伤与显微骨科湖北省武汉市430071 巴东县人民医院骨科湖北省恩施土家族苗族自治州444300

以“健康中国”战略为导向,从优势互补专业知识、共同连接医院社区、拓展研究社会健康三个方面去探讨健康社会工作者与全科医生在基层卫生环境中的合作价值,尤其在完善公共卫生应急体系和构建医联体上,健康社会工作者与全科医生的合作... 详细信息

以“健康中国”战略为导向,从优势互补专业知识、共同连接医院社区、拓展研究社会健康三个方面去探讨健康社会工作者与全科医生在基层卫生环境中的合作价值,尤其在完善公共卫生应急体系和构建医联体上,健康社会工作者与全科医生的合作可以发挥必不可少的作用,能有效推动健康社会的建设进程。同时文章也指明了目前健康社会工作面临的主要挑战,并提出相应的对策。

关键词：健康社会健康社会工作者全科医生基层卫生公共卫生应急医联体

维普期刊数据库博看期刊

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使用光谱分析实现弯管中两相流含气率的预测

光谱学与光谱分析 2025年第1期45卷 231-238页

作者：车少敏马世一刘雪婧殷雄周延熊兵李锟李飞西安交通大学能源与动力工程学院陕西西安710049 中国航发四川燃气涡轮研究院四川成都610500 西安石油大学电子工程学院陕西西安710065

空气被夹带进入发动机润滑油系统形成油气两相流后,会严重影响润滑系统的正常运行。因此实现发动机润滑油系统中油气两相流含气率的准确和快速测量具有十分重要的意义。基于光谱匹配方法,对发动机润滑油系统在弯管处的油气两相流含气率... 详细信息

空气被夹带进入发动机润滑油系统形成油气两相流后,会严重影响润滑系统的正常运行。因此实现发动机润滑油系统中油气两相流含气率的准确和快速测量具有十分重要的意义。基于光谱匹配方法,对发动机润滑油系统在弯管处的油气两相流含气率进行了测量研究。首先使用近红外、可见光和紫外光谱仪获取油气两相流在2个流速、5个温度工况下0.10%~1.00%含气率范围(间隔0.06%)的吸光度数据并进行分析,确认油气两相流在三个波段下均有吸收,且吸收强度与含气率有关;其次提出将数据预处理结合光谱相似性测度方法并应用于弯管含气率光谱分析中,显著降低了基于原始光谱的含气率预测的最大相对误差。在近红外波段通过使用数据增强方法如中心化(center)和标准化(autoscaling)并结合光谱角余弦方法,得出新润滑油的含气率最大相对误差相对于原始光谱得到的数值从48%降低到36%。利用该方法分别在三个波段进行含气率预测,试验工况包括2个流速、5个温度,分析了两相流的温度和流速对含气率预测的影响。温度30.0℃,流速5.1 m·min^(-1)下,含气率信息在紫外波段(193.5~413.8 nm)与光谱向量的方向或形状差异的联系更为紧密,含气率预测的最大相对误差仅为6%。在近红外和可见光波段,流速或温度一定时,最大相对误差随着温度或流速的增加均有减小趋势。紫外波段下温度对含气率预测效果没有特定的影响规律,随着两相流的流速增加,含气率预测的最大相对误差有增大趋势。结果表明对于透光性较好的新润滑油,使用紫外光谱仪进行含气率数据的采集,含气率的预测选用标准化预处理结合光谱角余弦方法,得到的含气率预测最大相对误差最小。

关键词：气液两相流含气率光谱分析光谱匹配

Effects of different iron sources on the performance of LiFePO_4/C composite cathode materials

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Journal of University of Science and Technology Beijing 2008年第6期15卷 802-807页

作者： fei Gao Zhiyuan Tang Jianjun xue School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China Great Power Battery Co. Ltd. Guangzhou 511483 China

Olivine LiFePO4/C composite cathode materials were synthesized by a solid state method in N2 ＋ 5vol% H2 atmosphere. The effects of different iron sources, including Fe（OH）3 and FeC2O4·2H2O, on the performance of as-synthesized cathode materials were investigated and the causes were also analyzed. The crystal structure, the morphology, and the electrochemical performance of the prepared samples were characterized by X-ray diffractometry （XRD）, scanning electron microscopy （SEM）, laser particle-size distribution measurement, and other electrochemical techniques. The results demonstrate that the LiFePO4/C materials obtained from Fe（OH）3 at 800℃ and FeC2O4·2H2O at 700℃ have the similar electrochemical performances. The initial discharge capacities of LiFePO4/C synthesized from Fe（OH）3 and FeC2O4·2H2O are 134.5 mAh.g^-1 and 137.4 mAh.g^-1 at the C/5 rate, respectively. How- ever, the tap density of the LiFePO4/C materials obtained from Fe（OH）3 are higher, which is significant for the improvement of the capacity of the battery.

关键词： iron sources lithium iron phosphate cathode material solid state method

Development of Ti_(0.85)Zr_(0.17)(Cr-Mn-V)_(1.3)Fe_(0.7)-based Laves phase alloys for thermal hydrogen compression at mild operating temperatures

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Rare Metals 2022年第8期41卷 2588-2594页

作者： Zi-Ming Cao pan-pan Zhou xue-Zhang Xiao Liu-Jun Zhan Zhi-fei Jiang Shu-Mao Wang Li-Jun Jiang Li-Xin Chen State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Department of Materials Science and Engineering The University of ManchesterManchesterM139PLUK Institute of Energy Materials and Technology General Research Institute for Non-ferrous MetalsBeijing100088China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou310013China

Metal hydride with proper hydrogen storage properties is the key component of hydride thermal hydrogen *** this work,Ti_(0.85)Zr_(0.17)(Cr-Mn-V)_(1.3)Fe_(0.7)-based alloys were developed to achieve thermal hydrogen compression at mild operating temperatures of water *** results indicate the single C 14-type Laves phase as well as homogeneously distributed elements of all *** increased Mn content in Ti_(0.85)Zr_(0.17)Cr_(1.2-x)Mn_xFe_(0.7)V_(0.1)(x=0,0.1,0.2,0.3)alloys.

关键词： alloys hydrogen Laves