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麻醉下手法松解联合静态渐进性牵伸技术治疗膝关节僵硬的临床研究

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中外医疗 2024年第18期43卷 1-4,24页

作者：曾得明周杰陈琦翔陈勇朱海丰周尤成戴垚文佛山市中医院广东佛山528000 雷州市中医院广东雷州524200

目的研究麻醉下手法松解联合静态渐进性牵伸技术治疗胫骨平台骨折术后膝关节僵硬的临床疗效。方法方便选取2022年1月—2023年6月佛山市中医院康复医学科就诊的72例胫骨平台骨折术后膝关节僵硬患者为研究对象,按照随机数字表法分为两组,... 详细信息

目的研究麻醉下手法松解联合静态渐进性牵伸技术治疗胫骨平台骨折术后膝关节僵硬的临床疗效。方法方便选取2022年1月—2023年6月佛山市中医院康复医学科就诊的72例胫骨平台骨折术后膝关节僵硬患者为研究对象,按照随机数字表法分为两组,各36例,对照组予以基础康复治疗,观察组在对照组的基础上使用麻醉下手法松解术联合静态渐进性牵伸治疗技术,疗程均为4周。比较两组术后膝关节功能。结果治疗4周后,观察组膝关节主动、被动关节活动度均明显优于对照组,差异有统计学意义(P均<0.05)。观察组膝关节功能评分(Hospital for Special Surgery Knee Score,HSS)、日常生活活动能力(Activity of Daily Liv-ing,ADL)均优于对照组,差异有统计学意义(P均<0.05)。观察组临床疗效优良率为75.00%,高于对照组的52.78%,差异有统计学意义(χ^(2)=5.163,P<0.05)。结论麻醉下手法松解联合静态渐进性牵伸技术治疗膝关节僵硬可有效增加胫骨平台骨折术后膝关节主、被动关节活动度,增强下肢肌力,改善患者日常生活能力,具有操作简便、临床疗效好等特点。

关键词：麻醉下手法松解静态渐进性牵伸技术康复治疗

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Dynamics and vibration reduction performance of asymmetric tristable nonlinear energy sink

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 389-406页

作者： Hongyan CHEN youcheng ZENG Hu DING Siukai LAI Liqun CHEN School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Frontier Science Center of MechanoinformaticsShanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200444China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina

With its complex nonlinear dynamic behavior,the tristable system has shown excellent performance in areas such as energy harvesting and vibration suppression,and has attracted a lot of *** this paper,an asymmetric tristable design is proposed to improve the vibration suppression efficiency of nonlinear energy sinks(NESs)for the first *** proposed asymmetric tristable NES(ATNES)is composed of a pair of oblique springs and a vertical ***,the three stable states,symmetric and asymmetric,can be achieved by the adjustment of the distance and stiffness asymmetry of the oblique *** governing equations of a linear oscillator(LO)coupled with the ATNES are *** approximate analytical solution to the coupled system is obtained by the harmonic balance method(HBM)and verified *** vibration suppression efficiency of three types of ATNES is *** results show that the asymmetric design can improve the efficiency of vibration reduction through comparing the chaotic motion of the NES oscillator between asymmetric steady *** addition,compared with the symmetrical tristable NES(TNES),the ATNES can effectively control smaller structural *** other words,the ATNES can effectively solve the threshold problem of TNES failure to weak ***,this paper reveals the vibration reduction mechanism of the ATNES,and provides a pathway to expand the effective excitation amplitude range of the NES.

关键词： asymmetric nonlinear energy sink(NES) tristable vibration control po-tential barrier

Space truss construction modeling based on on-orbit assembly motion feature

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Chinese Journal of Aeronautics 2024年第3期37卷 365-379页

作者： Changjie ZHAO Weizhong GUO Meng CHEN Jiaxing HU youcheng HAN Rongfu LIN State Key Lab of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Institute of Aerospace System Engineering Shanghai Shanghai 201109China

More space truss construction has been planned to develop and utilize space *** trusses are designed in the way of large-scale,complex,modular,and on-orbit *** meet the upcoming challenge of large-scale space infrastructure construction,it is necessary to study space truss automation design and robotic *** paper proposes an ordinal finite screw adjacency matrix model(OFSAMM),focusing on the relationship between assembly motions,to express and compute a space truss *** this model,a space truss is abstracted as a set of ordered assembly motions,each of which is recorded as a finite screw as the basic element of the truss and its *** operation of truss transformation is also derived under this ***,the truss configuration,the assembly sequence,the truss sub-assembly,the truss components,and the on-orbit assembly task can be expressed and calculated in a unified model,which is calculated and stores the truss topology and assembly with the minimum storage *** the end of this paper,we introduce how to synthesize and optimize space truss design through two *** study will help to improve design ***,it provides a theoretical basis for the automatic construction of space truss structures,especially in the next stage.

关键词： Adjacency matrix Finite screw On-orbit construction modeling Space applications Space trusses Topology design

CHAOTIC GROUP ACTIONS

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Applied Mathematics(A Journal of Chinese Universities) 2003年第1期18卷 59-63页

作者： ShiEnhui zhouLizhen zhouyoucheng Dept.ofMath. ZhejiangUniv.Hangzhou310027China Dept.ofMath. SuzhouUniv.Suzhou215006China

It is proved that there is no chaotic group actions on any topological space with free *** this paper the chaotic actions of the group like G×F ,where F is a finite group,are *** particular,under a suitable assumption,if F is a cyclic group,then the topological space which admits a chaotic action of Z×F must admit a chaotic homeomorphism.A topological space which admits a chaotic group action but admits no chaotic homeomorphism is constructed.

关键词： group actions chaos topological transitivity.

Application of electromagnetic metallurgy in continuous casting: A review

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Progress in Natural Science:Materials International 2024年第1期34卷 1-11页

作者： Jiale Li Yi Nian Xiang Liu youcheng Zong Xinyu Tang Chaojie Zhang Liqiang Zhang The Intelligent Metallurgy Research Institute School of Metallurgical Engineering Anhui University of Technology

The standards within the global steel industry are constantly advancing, necessitating increasingly rigorous quality control protocols during the continuous casting process. Central to the challenges faced in this domain are persistent defects such as central segregation, V-shaped segregation, and center porosity, which significantly impede the production of high-caliber steel products. The discipline of electromagnetic metallurgy has emerged as a critical solution in reducing these defects, thereby enhancing the efficiency and stability of continuous casting operations. Its demonstrated effectiveness has led to its widespread implementation across global and domestic steel production industries. This paper aims to deliver a comprehensive examination of electromagnetic metallurgy's impact on the final stages of solidification in continuous casting, along with its contributions to the heating and purification processes within the tundish. Additionally, it will explore the potential advancements and applications of this technology in the evolving sphere of continuous casting.

关键词： continuous casting Quality control Final electromagnetic stirring Induction heating Electromagnetic purification

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公路软基超载预压卸荷沉降速率标准研究

工业建筑 2009年第12期39卷 70-73页

作者：杨涛周有成李聪上海理工大学土木工程系上海200093

软土地基上的路基施工常采用沉降速率法确定超载卸荷时间。现有的沉降速率法主要依据地方经验沉降速率标准,无法与获得的工后沉降相联系。基于分级加荷条件下地基固结度计算的改进太沙基公式,推导出超载沉降速率与等载工后沉降间的关系... 详细信息

软土地基上的路基施工常采用沉降速率法确定超载卸荷时间。现有的沉降速率法主要依据地方经验沉降速率标准,无法与获得的工后沉降相联系。基于分级加荷条件下地基固结度计算的改进太沙基公式,推导出超载沉降速率与等载工后沉降间的关系式,据此建立按容许工后沉降控制的超载预压卸荷沉降速率标准。有限元数值模拟分析表明,相对于地方经验沉降速率标准过于严格,该沉降速率标准卸荷控制的工后沉降满足规范要求。通过应用于实际工程,给出了超载卸荷时间。

关键词：超载预压沉降速率标准工后沉降卸荷时间

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面向智能产品的数字孪生体功能模型构建方法

计算机集成制造系统 2019年第6期25卷 1392-1404页

作者：周有城武春龙孙建广刘芳李辉河北工业大学国家技术创新方法与实施工具工程技术研究中心天津300130 河北工业大学机械工程学院天津300130

智能产品的概念结构分析是其创新设计的必要步骤,有效的分析方法有助于提升智能产品创新设计效率。为全面展现智能产品信息—物理域交互作用,从智能产品特性出发,划分其模块组成,并利用数字孪生体重新表述智能产品的模块化功能实现方式... 详细信息

智能产品的概念结构分析是其创新设计的必要步骤,有效的分析方法有助于提升智能产品创新设计效率。为全面展现智能产品信息—物理域交互作用,从智能产品特性出发,划分其模块组成,并利用数字孪生体重新表述智能产品的模块化功能实现方式。基于智能产品的数字孪生表述,扩展和改进已有功能模型构建方法,实现对智能产品概念结构的全面分析。基于数字孪生体构建智能产品的功能模型可以直观体现系统结构及问题,提升设计效率。

关键词：数字孪生智能产品概念结构功能模型创新设计

基于TRIZ功能建模的扩展碰撞预警系统数字孪生概念方案构建

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计算机集成制造系统 2021年第2期27卷 337-351页

作者：朱天明武春龙周有城张鹏张小俊河北工业大学国家技术创新方法与实施工具工程技术研究中心天津300401 天津市新能源汽车动力传动与安全技术重点实验室天津300130 河北工业大学机械工程学院天津300401 中国船舶重工集团公司第716研究所江苏连云港222061

针对碰撞预警系统建模和仿真结果难以真实表达物理域,而且现有碰撞预警系统仅限于车内预警,用户得到的预警信息较少的问题,提出扩展碰撞预警系统服务架构,探讨了其组成和运作流程,基于数字孪生五维框架,详述了面向扩展碰撞预警系统的数... 详细信息

针对碰撞预警系统建模和仿真结果难以真实表达物理域,而且现有碰撞预警系统仅限于车内预警,用户得到的预警信息较少的问题,提出扩展碰撞预警系统服务架构,探讨了其组成和运作流程,基于数字孪生五维框架,详述了面向扩展碰撞预警系统的数字孪生建模过程,并在概念设计阶段基于发明问题解决理论功能模型对其进行功能建模,实现了其功能的全面表达,形成集智能产品和电子服务的整体解决方案,并利用层次分析—模糊综合评价法对所构建概念方案进行评估。通过系统物理实体和虚拟实体的交互融合特性,扩展碰撞预警系统在概念层面的功能建模开发成为可能。

关键词：扩展碰撞预警系统数字孪生五维框架功能建模发明问题解决理论层次分析—模糊综合评价法

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Banach空间上的强混合算子

数学年刊（A辑） 2006年第2期27卷 189-196页

作者：姚玉武史恩慧周友成苏州大学数学科学学院江苏苏州215006

1999年,*** 证明了任意无限维可分 Banach 空间上存在拓扑传递的有界线性算子．这个结果肯定地回答了 *** 提出的问题．本文证明了由 *** 所给出的算子实际上是强混合的,同时,对加权移位算子的混合性利用权序列进行了刻划并指出任意无... 详细信息

1999年,*** 证明了任意无限维可分 Banach 空间上存在拓扑传递的有界线性算子．这个结果肯定地回答了 *** 提出的问题．本文证明了由 *** 所给出的算子实际上是强混合的,同时,对加权移位算子的混合性利用权序列进行了刻划并指出任意无限维可分 Hilbert 空间上存在弱混合而非强混合的有界线性算子．

关键词：拓扑传递性弱混合强混合加权移位算予 Banach空间