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Impact of early serum sodium concentrations on prognosis in maintenance hemodialysis patients

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China Medical Abstracts(Internal Medicine) 2023年第4期40卷 230-231页

作者：陈思瑜 Kidney Dis Center 1st Affil HospMed CollZhejiang UnivHangzhou 310003

Objective To determine the impact of early serum sodium concentrations on the survival prognosis in maintenance hemodialysis(MHD)patients.Methods It was a retrospective cohort study.The newly admitted hemodialysis patients who were included in the registration system of Zhejiang Province Dialysis Quality Control Center from January 1,2010 to December 31。

关键词： admitted Impact maintenance

A prospective cohort study on the association of cognitive impairment and all-cause mortality in the middle and elderly adult patients undergoing maintenance hemodialysis

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China Medical Abstracts(Internal Medicine) 2022年第1期39卷 52-53页

作者：郭一丹 Dept Nephrol Beijing Shijitan HospCapital Med UnivBeijing 100038

Objective To investigate the association between cognitive impairment and all-cause mortality in middle and elderly adult patients undergoing maintenance hemodialysis(HD).Methods A prospective cohort study was conducted.Patients from 11 HD centers in Beijing between April and June 2017 were enrolled.Baseline data were collected,and a series of neuropsychological batteries covering 5 domains of cognitive function were applied for the assessment of cognitive function.

关键词： function centers maintenance

Considering Monopoly maintenance Cost for an Automobile Purchase in China: A DEA-Based Approach

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Journal of Systems Science & Complexity 2019年第4期32卷 1167-1179页

作者： DAI Qianzhi LI Lin LEI Xiyang AN Qingxian TANG Xiao School of Economics Hefei University of TechnologyHefei 230009China Center for Industrial Information and Economic Research Hefei University of TechnologyHefei 230009China Academy of Mathematics and Systems Science Chinese Academy of ScienceBeijing 100190China School of Management Hefei University of TechnologyHefei 230009China School of Business Central SouthUniversityChangsha 410083China School of Management University of Science and Technology of ChinaHefei 230026China

With the fast growing economy,China has become the biggest automobile market in the world.Many Chinese families buy automobiles to promote individual wellbeing and facilitate the convenience of lives.Automobile purchase has become a general and important decision for a Chinese family.However,it is always difficult to make a decision on the automobile purchase that balance the automobiles performance and its cost.Moreover,the automobile maintenance market in China is monopolistic.Thus,the maintenance cost is a significant consideration in automobile purchase decision.This paper employs the concept of data envelopment analysis(DEA)to measure cost performance of the automobile with considering the monopoly maintenance cost.The RCA(ratio of the total price of accessories of an automobile to the price of the automobile)100 index system is used to represent the maintenance cost of each automobile.The structure of the automobile maintenance market can be reflected with including the RCA 100 index system in the performance evaluation.Results of the case study of 28 automobiles in China verify the necessity of considering the maintenance cost in automobile purchase decision.

关键词： Automobile purchase business analytics cost performance data envelopment analysis(DEA) monopoly maintenance cost

DELMIA人机工程在飞机虚拟维修中的应用（英文）

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机床与液压 2015年第18期43卷 75-80页

作者：王占海李勇王霖中国民航局航空事故调查中心北京100028

以目前航空部门普遍采用的DELMIA软件为平台,介绍了虚拟维修技术在飞机维修性设计中的作用,阐述了基于DELMIA软件的交互式虚拟维修流程,以及其中的虚拟场景构建、维修仿真过程和维修性分析、评价技术。

关键词： DELMIA, Ergonomics, Aircraft, Virtual maintenance

Design theories and maintenance technologies of slab tracks for high-speed railways in China:a review

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Transportation Safety and Environment 2021年第4期3卷 1-19页

作者： Juanjuan Ren Shijie Deng Kaiyao Zhang Wei Du Qinghong Wu MOE Key Laboratory of High-speed Railway Engineering Southwest Jiaotong UniversityChengdu 610031China School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China

The durability and reliability of slab track structures are essential for the long-term safety and stable operation of high-speed railways.In order to provide a solid theoretical basis and technical reference for the advancement of high-speed railway quality,this paper comprehensively discusses design theories of slab track structures,service performance evolution and maintenance technologies,and reviews the innovation happening in the industry.On top of that,the damage evolution,fatigue features and durability of slab tracks,which are highly relevant to serviceability,are summarized,and the future research trend of slab track service behaviours is pointed out.In addition,this paper summarizes the rules of establishing standards for damage maintenance,typical solutions for repairing damage and methods of evaluating the maintenance outcomes that combine field tests and numerical simulations.It also envisions a future direction where advanced testing technologies would assist the evaluation of maintenance effects.

关键词： high-speed railway slab track design theory service performance maintenance

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沥青路面有机硅预防性养护材料的性能研究

新型建筑材料 2015年第5期42卷 43-47页

作者：张苏龙洪锦祥林俊涛陈香江苏省建筑科学研究院有限公司高性能土木工程材料国家重点实验室江苏南京210008 江苏苏博特新材料股份有限公司江苏南京211103

研究了几种有机硅预防性养护材料(SPM)的分子结构与其关键性能之间的构效关系,并利用扫描电镜观测了其在混合料表面的成膜效果。通过渗水实验、TSR、肯塔堡飞散实验研究了SPM处治后对混合料路用性能的改善效果。实验结果表明,SPM固化成... 详细信息

研究了几种有机硅预防性养护材料(SPM)的分子结构与其关键性能之间的构效关系,并利用扫描电镜观测了其在混合料表面的成膜效果。通过渗水实验、TSR、肯塔堡飞散实验研究了SPM处治后对混合料路用性能的改善效果。实验结果表明,SPM固化成膜后可以赋予沥青混合料良好的防水性能,并且可以在水损害和有机溶剂侵蚀的条件下起到松散抑制效果。然而,抗滑摆值和构造深度实验表明,对于SMA和AC等空隙率较小的混合料,SPM使用后会使其抗滑性能降低10%左右。

关键词：有机硅预防性养护材料(SPM) 构效关系防水性能松散抑制抗滑性能 silicone preventive maintenance material (SPM)

A Fuzzy Logic-Based Modeling Method of Deciding maintenance Policies

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Journal of Donghua University(English Edition) 2011年第3期28卷 248-251页

作者：周炳海刘晓斌 School of Mechanical Engineering Tongji University

To make equipment maintenance policies more suitable to real operations, a fuzzy logic-based modeling method of deciding maintenance policies was proposed in this paper. Five maintenance policies which are built with downtime and breakdown frequency as decision criteria are discussed. To decide efficiently maintenance policies, the decision criteria are divided into low, medium, and high levels. On the basis of the levels, fuzzy sets and membership functions of the decision criteria are established with a fuzzy logic theory. A fuzzy logic algorithm of solving overall degree of satisfaction is presented to select the most efficient maintenance policy for equipment. Finally, the modeling method is tested. Experiment results show that the proposed method can solve efficiently problems of the traditional decision-making bias, and it is more valid and practical than the method of traditional decision-making grid (DMG).

关键词： maintenance policy fuzzy logic decision-making frequency of breakdown preventive maintenance

Multi-objective optimization in highway pavement maintenance and rehabilitation project selection and scheduling:A state-of-the-art review

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道路工程学报(英文) 2023年第3期3卷 239-251页

作者： Mohammadhosein Pourgholamali Samuel Labi Kumares C.Sinha Lyles School of Civil Engineering Purdue UniversityWest LafayetteIN 47907USA

The motivation for cost-effective management of highway pavements is evidenced not only by the massive expenditures associated with these activities at a national level but also by the consequences of poor pavement condition on road users.This paper presents a state-of-the-art review of multi-objective optimization(MOO)problems that have been formulated and solution techniques that have been used in selecting and scheduling highway pavement rehabilitation and maintenance activities.First,the paper presents a taxonomy and hierarchy for these activities,the role of funding sources,and levels of jurisdiction.The paper then describes how three different decision mechanisms have been used in past research and practice for project selection and scheduling(historical practices,expert opinion,and explicit mathematical optimization)and identifies the pros and cons of each mechanism.The paper then focuses on the optimization mechanism and presents the types of optimization problems,formulations,and objectives that have been used in the literature.Next,the paper examines various solution algorithms and discusses issues related to their implementation.Finally,the paper identifies some barriers to implementing multi-objective optimization in selecting and scheduling highway pavement rehabilitation and maintenance activities,and makes recommendations to overcome some of these barriers.

关键词： Multi-objective optimization Highway pavement Rehabilitation maintenance Project selection Project scheduling Decision mechanism Pavement management

maintenance,Repair,and Reinforcement Measures for Dilapidated Small and Medium-Sized Bridges

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Journal of Architectural Research and Development 2024年第1期8卷 62-67页

作者： Xu Meng Bo Liu Ji Li Zhi Tu China Merchants Chongqing Highway Engineering Testing Center Co. Ltd.Chongqing 400060China Chongoing Construction Science Research Inspection and Testing Co. Ltd.Chongqing 400060China

The paper initiates by exploring the importance of maintaining,repairing,and reinforcing bridges.Subsequently,it delves into routine and preventative maintenance measures tailored for small to medium-sized bridges.Additionally,the paper examines repair and reinforcement techniques specifically designed for deteriorated small and medium-sized bridges,encompassing methods for fortifying both the bridge foundation and upper and lower structures.Lastly,the paper proposes suggestions aimed at fostering discussions and exchanges on the development of maintenance and repair processes for deteriorated small and medium-sized bridges.

关键词： Dilapidated small and medium-sized bridges maintenance Repair and reinforcement