An Application of Multi-echelon Inventory System Theory to Management of Equipment Maintenance

The multi echelon inventory system theory (MEIST) ,which is an important branch of inventory theory, is applied mainly in solving the problem of a multi echelon inventory and supply system. In this paper, a brief review of MEIST is given and its main points are summarized. An application is made to the decision of spares stock levels in maintenance management. The result shows that it can reduce costs of spares by using MEIST in the case of a multi echelon maintenance system.

GNSS/MET Station Equipment Maintenance and Product Application

Based on the use of Global Navigation Satellite System (GNSS) for meteorological detection in the world, we used the GNSS/MET detection equipment in the meteorological departments of Liaoning Province of China and its data to study and summarize the maintenance methods of GNSS/MET (Global Navigation Satellite System Meteorology) detection equipment and the application of water vapor products in operational systems. The results show that: 1) For GNSS/MET failures, specific inspections and classifications can be performed according to different phenomena;2) The GNSS water vapor measurement station samples every 30 seconds, forming one set of GNSS data every hour, and can detonate the atmospheric precipitation by solving the original data;3) Using the “Navigation Satellite Remote Sensing Water Vapor Application Management System”, the GNSS/MET water vapor products can be directly displayed. We can get the conclusion that GNSS/MET has far-reaching significance for studying the law of atmospheric water vapor changes and enhancing the ability to monitor severe weather such as heavy rain and strong convection.

Effect of Infrared Irradiation Combined with External Application Nursing on Maintenance of Vascular Access in Hemodialysis Patients

Objective:This paper mainly analyzes the effect of infrared radiation combined with external application nursing on maintenance of vascular access in hemodialysis patients.Methods:A total of 150 hemodialysis patients in our hospital from December 2019 to September 2020 were divided into the conventional group and the study group,75 cases in each group.The conventional group was given external application nursing alone,and the study group was given infrared radiation combined with external application nursing,and the effect on the maintenance of vascular access was counted.Results:After the intervention,the indexes of URR,kt/V and human albumin in the study group were higher than those in the routine group,and the indexes of β2-mg and MIS in the study group were lower than those in the routine group,P<0.05;The improvement of vascular elasticity and quality of life in the study group was higher than that in the conventional group,and the incidence of complications was lower than that in the conventional group,P<0.05.Conclusion:Infrared radiation combined with external application of nursing care in hemodialysis patients with vascular access maintenance effect is significant,can effectively improve vascular elasticity.

A generic framework for qualifications of digital twins in maintenance

Digital twins have emerged as a promising technology for maintenance applications,enabling organizations to simulate and monitor physical assets to improve their performance.In Operation and Maintenance(O&M),digital twin facilitates the diagnosis and prognosis of critical assets,forming the basis for smart maintenance planning and reducing downtime.However,there is a lack of standardized approaches for the qualifications of digital twins in maintenance,leading to low trustworthiness and limiting its application.This paper proposes a novel framework for the qualifications of digital twins in maintenance based on five pillars,namely fidelity,smartness,timeliness,integration,and standard compliance.We demonstrate the effectiveness of the framework through two case studies,showing how it can be implemented on digital twins for preventive maintenance and condition-based maintenance.Our proposed framework can help organizations across different industrial domains develop and implement digital twins in maintenance more effectively and efficiently,leading to significant benefits in terms of cost reduction,performance improvement,and sustainability.

Application Server Aging Model and Multi-Level Rejuvenation Strategy Using Semi-Markov Process

Aiming at the characteristic of the dependency between the application components and the application server platform, a rejuvenation strategy with two different levels of rejuvenation granularities is put forward in this paper including the application component reiuvenation and the application server system rejuvenation. The availability and maintenance cost functions are obtained by means of establishing the application server aging model and the boundary condition of the optimal rejuvenation time is analyzed. Theory analysis indicates that the two-level rejuvenation strategy is superior to the traditional single level one. Finally, evaluation experiments are carried out and numerical result shows that compared with the traditional rejuvenation policy, the rejuvenation strategy proposed in this paper can further increase availability of the application server and reduce maintenance cost.

Application of Wild Flowers in City Colors

Types and application of wild flower combinations were introduced,selection principles and compositions analyzed according to different application environments.According to environmental conditions and application styles of the planning site,cultivation and maintenance of wild fl ower combinations were studied to explore the cultivation and application techniques of different combinations,ecological landscape functions of wild fl ower combinations,and application prospects in northern cities of China.

Role of Fine Management in Maintenance of Deep Venous Indwelling Catheter in Hemodialysis Patients

Objective:This paper mainly explores the effect of fine management application in maintenance of deep venous indwelling catheter in hemodialysis patients.Methods:150 hemodialysis patients with deep venous catheter indwelling in our hospital from December 2019 to September 2020 were divided into routine group and study group.The routine group was given routine nursing,and the study group was given fine management nursing.The nursing effect of the two groups was analyzed.Results:After nursing intervention,the incidence of complications in the study group was 14.66%,which was lower than that in the conventional group(53.33%),and the nursing compliance in the study group(98.66%)was higher than that in the conventional group(89.33%),all P<0.05.Conclusion:Fine management plays a significant role in the maintenance of deep venous indwelling catheter in hemodialysis patients,which can reduce the occurrence of complications.

Deploying a Deep Learning-based Application for an Efficient Ther­mal Energy Storage Air-Conditioning(TES-AC)System:Design Guidelines

Facility management and maintenance of the Thermal-Energy-Storage Air-Conditioning(TES-AC)system is a tedious task at a large scale mainly due to the charging load that can increase energy consumption if needed to be charged at peak hours.Besides,maintenance of TES-AC at a large scale gets complex as it contains many sensor data.By utilizing deep learning techniques on the sensor data,charging load prediction can be made possible,so facility managers can prepare in advance.However,a deep learning-based application will be unusable if it is not deployed in a user-friendly manner where facility managers can benefit from this application.Hence,this research focuses on gathering design guidelines for a deep learning-based application and further validates the design considerations with a developed application for efficient human-computer interaction through qualitative analysis.The approach taken to gather design guidelines demonstrated a positive correlation between expert-suggested features and the user-friendly aspect of the application as 67.08%of participants found the features suggested by experts to be most satisfactory.Furthermore,it evaluates user satisfaction with the advanced developed application for TES-AC according to the gathered design guidelines.

老旧直升机维修中无损检测技术的应用

随着使用年限的增长,老旧直升机结构性故障和偶发性故障逐渐增多,给维护修理带来了诸多困难,维护人员常常不能及时发现和消除故障隐患。针对当前老旧直升机的特点和维修现状,介绍了无损检测技术在航空维修领域中的应用,结合直升机结构特点和使用情况探讨确定老旧直升机无损检测的重点部位和关键部件,围绕不同无损检测技术特点对直升机关键部件检测的具体应用方法进行阐述,并结合老旧直升机维护实践对无损检测技术的使用时机做出探讨和研究,最后对无损检测技术在老旧直升机维修中的应用前景进行了展望。

新能源汽车维修中电子诊断技术的应用分析

随着中国新能源汽车行业的蓬勃发展,对新能源汽车的质量和性能要求越来越高,这在一定程度上增加了新能源汽车的市场份额,同时电子诊断技术也得到了飞速的发展。电子诊断技术是一种优质的技术,其应用范围与传统诊断技术不同,电子诊断技术有利于新能源汽车的维修与保养,能够提升新能源汽车的使用效率。本文就新能源汽车的发展现状,电子诊断技术的概念特点、价值、方法及实际应用进行分析。

BIM技术在市政道路设施养护中的应用探析

文章首先介绍了BIM技术的特点及其优势,并在此基础上,分析了市政道路设施养护中BIM技术的应用现状,总结了市政道路设施养护中BIM技术的应用内容与方向。并分别从设施巡管、日常养护、集中维修、检测工作、安全运营等方面进行了阐述,以期为今后相关工作者养护市政道路设施提供借鉴。

运输领域北斗应用方案设计研究

北斗卫星导航系统(BeiDou Navigation Satellite System, BDS)已经实现了全球组网,并提供覆盖全球的导航和定位服务.在交通运输领域,BDS被广泛应用于车辆定位监控、智能导航、路径规划和车队管理等方面,为运输产业提供了更高效、安全和可靠的服务,对于我国交通领域的发展和现代化有着积极的推动作用.在新时期的运输产业规划建设要求下,智能运维体系的建设与发展仍存在着缺乏统一标准、信息不畅、集中调度存在瓶颈、设施重复性建设等问题,在此情况下充分发挥北斗技术在智能运维领域的应用,将助力运输产业高质量发展.本方案设计旨在系统性研究北斗技术应用方案,完成监测、调度和资源部署一体化设计,实现降本增效,为北斗产业化发展和系统化应用作出贡献.从总体架构、系统组成、平台建设三个层面进行了具体的研究探讨,实现了运输领域智能运维的顶层应用方案设计,通过BDS规模化的运用来提高运输效率、安全性和管理能力.

浅谈数字孪生平台三维底座的自主建设关键技术与应用

文章结合实际城市CIM平台建设项目,对数字孪生平台三维底座的自主建设关键技术进行讨论,为今后建筑三维管理平台建设项目提高多元模型整合及平台流畅度,优化平台交互展示能力,降低三维平台资源占用率提供借鉴。

新能源汽车维修电子诊断技术的应用对策

新能源汽车作为环保和可持续发展的代表,具有更高的能效和更低的尾气排放。然而,由于其技术复杂性和电动系统的特殊性,维修新能源汽车所需的专业知识和技能也更为复杂和独特。电子诊断技术在新能源汽车的维修中发挥着重要作用,它能够准确识别和定位故障,并提供相应的解决方案。因此,针对新能源汽车维修电子诊断技术的应用对策具有重要的意义,可提高维修效率、降低成本,并确保新能源汽车的可靠性和安全性。

北京地铁资产运维标准体系研究及其数字化应用

本文基于北京地铁资产全寿命周期管理、维修业务精细化管控与信息化管理三重需求,提出北京地铁资产运维标准体系架构设计思路。结合北京地铁智能运维平台的建设与运行,按照统一规划、统一设计、统一建设与统一运维的原则,构建标准数字化转型的应用场景,围绕标准形式数字化与标准过程数字化两个转型方向,提出标准体系贯通应用于智能运维平台建设及应用场景的工作思路,推动标准化工作向数字化、网络化与智能化转型,并以北京地铁6号线智能运维平台试点应用为案例,验证了标准体系指导并规范信息化系统的建设及运行工作的作用及意义。

双视角数据下移动应用BUG报告识别方法研究

为了快速而准确地识别其中的BUG报告将有助于开发人员对移动应用进行修复,通过调查移动应用运行的不同阶段,以用户反馈和问题报告两个视角为切入点,提出基于深度学习的移动应用BUG报告自动识别方法,即首先使用Word2Vec获取词向量,其次,构建Bi-LSTM网络获取高级文本特征,并通过注意力机制分配权重以捕获句子中对BUG报告识别起到关键作用的信息,最后获取问题报告的BUG标签.实验结果表明所提方法在准确率、召回率、F1-score和查准率上均有提高,有助于开发人员准确识别移动应用的BUG报告,提高BUG修复效率.

探讨高速路网新型综合养护模式的建立与应用

与传统养护模式相比,新型综合养护模式是一种养护理念的更替,其核心始终围绕“人的建设”进行建立和运作,更注重集体观念、队伍意识、共同责任等管理思想对参与者进行宣贯和引导。通过对传统养护模式现状的分析,提出了新型综合养护模式的定义、理念架构,对各要素构建、模式运作、效能评估以及综合养护基地的建设和配套等方面进行论述和指引设立。结合广州某环城高速的应用实例进行评估后发现,新型养护模式可提高养护工作效率,降低养护过程对社会交通造成的负面影响。

桥梁信息化监测在公路桥梁养护中的应用

文章深入探讨了桥梁信息化监测在公路桥梁养护中的核心应用,通过对比传统桥梁养护与信息化监测的不同强调数据驱动方法的优越性,尤其是在实时健康监测、预警系统与灾害预防以及基于数据的维修决策等方面。文章还详细介绍了桥梁信息化监测的关键技术,包括各种传感器技术如应变计、加速度计和光纤传感器,以及数据的传输和分析处理平台,并分析桥梁信息化监测应用于公路桥梁养护的基本途径。结论部分指出,桥梁信息化监测已成为公路桥梁养护新标准,为桥梁的长期健康和持续发展提供强有力的保障。

赋能教育配合无缝隙护理预防MHD患者AVF并发症的临床价值

目的 观察赋能教育配合无缝隙护理模式预防维持性血液透析(maintenance hemodialysis disease,MHD)患者动静脉内瘘(arteriovenous fistula,AVF)并发症的价值。方法 选取2021年6月—2023年6月于福建医科大学附属第二医院东海院区接受MHD的280例患者。按收治时间进行分组,其中2021年6月—2022年5月收治的患者纳入对照组(n=140),2022年6月—2023年6月收治的患者纳入研究组(n=140)。对照组行常规护理,研究组在其基础上予以赋能教育配合无缝隙护理。观察2组内瘘闭塞、动脉瘤样扩张情况、AVF发生情况,评估2组患者干预前后的生活质量。结果 干预后,研究组内瘘闭塞发生率、动脉瘤样扩张发生率分别为4.29%、7.86%,低于对照组的10.71%、16.43%(P <0.05)。研究组患者AVF并发症总发生率为5.71%,低于对照组的17.14%(P <0.05)。干预后2组健康、情感以及心理评分均增加,且研究组高于对照组(P <0.05)。结论 赋能教育配合无缝隙护理模式能够有效预防MHD患者AVF并发症的发生,同时有利于MHD患者生活质量的提高。