Digital Twin-based Quality Management Method for the Assembly Process of Aerospace Products with the Grey-Markov Model and Apriori Algorithm

The assembly process of aerospace products such as satellites and rockets has the characteristics of single-or small-batch production,a long development period,high reliability,and frequent disturbances.How to predict and avoid quality abnormalities,quickly locate their causes,and improve product assembly quality and efficiency are urgent engineering issues.As the core technology to realize the integration of virtual and physical space,digital twin(DT)technology can make full use of the low cost,high efficiency,and predictable advantages of digital space to provide a feasible solution to such problems.Hence,a quality management method for the assembly process of aerospace products based on DT is proposed.Given that traditional quality control methods for the assembly process of aerospace products are mostly post-inspection,the Grey-Markov model and T-K control chart are used with a small sample of assembly quality data to predict the value of quality data and the status of an assembly system.The Apriori algorithm is applied to mine the strong association rules related to quality data anomalies and uncontrolled assembly systems so as to solve the issue that the causes of abnormal quality are complicated and difficult to trace.The implementation of the proposed approach is described,taking the collected centroid data of an aerospace product’s cabin,one of the key quality data in the assembly process of aerospace products,as an example.A DT-based quality management system for the assembly process of aerospace products is developed,which can effectively improve the efficiency of quality management for the assembly process of aerospace products and reduce quality abnormalities.

Formal Modeling and Discovery of Multi-instance Business Processes: A Cloud Resource Management Case Study

Process discovery, as one of the most challenging process analysis techniques, aims to uncover business process models from event logs. Many process discovery approaches were invented in the past twenty years;however, most of them have difficulties in handling multi-instance sub-processes. To address this challenge, we first introduce a multi-instance business process model(MBPM) to support the modeling of processes with multiple sub-process instantiations. Formal semantics of MBPMs are precisely defined by using multi-instance Petri nets(MPNs)that are an extension of Petri nets with distinguishable tokens.Then, a novel process discovery technique is developed to support the discovery of MBPMs from event logs with sub-process multi-instantiation information. In addition, we propose to measure the quality of the discovered MBPMs against the input event logs by transforming an MBPM to a classical Petri net such that existing quality metrics, e.g., fitness and precision, can be used.The proposed discovery approach is properly implemented as plugins in the Pro M toolkit. Based on a cloud resource management case study, we compare our approach with the state-of-theart process discovery techniques. The results demonstrate that our approach outperforms existing approaches to discover process models with multi-instance sub-processes.

Research on Quality Management Measures of Green Building Construction

Urbanization has led to the rapid development of the construction industry.However,this has also led to higher requirements for the construction engineering management.Other than the quality monitoring of engineering construction,the energy-saving properties of the building should also be considered.Therefore,a scientific management approach should be adopted to improve green building management.This paper primarily examines the importance of quality management in green building construction,along with the factors influencing it.It also identifies the quality issues present in current green building construction.Finally,it proposes measures for quality management in the green building construction process to facilitate the industry’s healthy development.

Procedure Design to Fulfill Quality Management System

With the application of the principle of PDCA, and dr awing on the experience of the process methods of the ISO9000 and the system met hods of management, the author analyses the basic requirement to fulfill quality management system in enterprises. Then the author inquires into the procedure t o establish the efficiency quality management system. Finally four stages (plan, do, check, action) and eight steps (decision, plan, analyze, design, do, check, improve, fulfill) are put forward to fulfill quality management system.

Controlling of crustacean zooplankton reproduction in biological activated carbon (BAC) filters by strengthen operation and management of conventional process

To counter the mass reproduction and penetration of crustacean zooplankton in Biological Activated Carbon(BAC)filters which may result in the presence of organisms in potable water and water pollution,this paper analyzed the factors affecting organisms' reproduction in BAC filters.A comparative study was performed on the density and composition of crustacean zooplankton of the concerned water treatment units of two advanced water plants(Plant A and B)which with the same raw water and the same treatment technique in southern China.The results obtained show that the crustaceans' density and composition was very different between the sand filtered water of Plant A and Plant B.which Harpacticoida bred sharply in the sediment tanks and penetrated sand filter into BAC filters was the primary reason of crustaceans reproduce in BAC filters of Plant A.For prevention of the organisms reproduction in BAC,some strengthen measures was taken including pre-chlorination,cleaning coagulation tanks and sediment tanks completely,increasing sludge disposal frequency to stop organisms enter BAC filters,and the finished water quality was improved and enhanced.

Research on Welding Quality Traceability Model of Offshore Platform Block Construction Process

Quality traceability plays an essential role in assembling and welding offshore platform blocks.The improvement of the welding quality traceability system is conducive to improving the durability of the offshore platform and the process level of the offshore industry.Currently,qualitymanagement remains in the era of primary information,and there is a lack of effective tracking and recording of welding quality data.When welding defects are encountered,it is difficult to rapidly and accurately determine the root cause of the problem from various complexities and scattered quality data.In this paper,a composite welding quality traceability model for offshore platform block construction process is proposed,it contains the quality early-warning method based on long short-term memory and quality data backtracking query optimization algorithm.By fulfilling the training of the early-warning model and the implementation of the query optimization algorithm,the quality traceability model has the ability to assist enterprises in realizing the rapid identification and positioning of quality problems.Furthermore,the model and the quality traceability algorithm are checked by cases in actual working conditions.Verification analyses suggest that the proposed early-warningmodel for welding quality and the algorithmfor optimizing backtracking requests are effective and can be applied to the actual construction process.

Common Management Process Model of New TQM Based on the Situation Analysis

In the previous study, we suggested the concept of new TQM based on the consideration of basic concept of Quality Control. Also, in the previous study, we suggested the target domains and entities of product and process based on the TQM Matrix and view point of Three Dimensional Unification Value Models for managing quality of organization systems. Furthermore, in the previous study, we suggest the Common Management Process of organizations. Based on the above suggestion, in this paper, we would like to propose the Common Management Process Model of Total Quality Management based on the consideration of situation analysis and more precise definition of TQM Matrix and Three Dimensional Unification Value Model of “Product and Process”. Improvement of quality and efficiency of organization management can be expected by the integration of conventional different management such as quality assurance, quality improvement, risk management, investment individually from the view point of common management process.

Benefits, Difficulties, and Success Factors of Three Different Quality Assessment Processes in Estonia

Quality assessment systems for business organisations and also for vocational schools were established in Estonia at the beginning of 2000s. Almost ten years later, corresponding systems were introduced also for higher education institutions （HEIs）. All these assessment systems are based on the European Foundation of Quality Management （EFQM） excellence model. The aim of this paper is to analyse benefits, difficulties, and success factors of quality assessment processes in Estonian business organisations, vocational schools, and HEIs. The study is based on the analysis of feedback questionnaire of 404 representatives from participating organisations （HEIs, vocational schools, and business enterprises） and assessors. Our analysis revealed that quality assessment processes including self-assessment reporting had a positive effect on organisation development and it has given the participants certain benefits and new challenges. As a consequence, knowledge about quality management as well as the self-assessment skills has been improved. The main difficulties were connected to limited time resources and with problems to recognize direct benefits of quality assessment. As substantial difficulties, limitations of analytical and report-writing skills were considered. As the biggest success factor, an involvement of managers on different levels decision making was recognized. The analysis revealed that there are a number of similar benefits and difficulties in the quality assessment systems of different organizations.

The Research to Quality Supervision and Management of Power Enterprises

Intensive in-depth development of resources, centralized purchasing and gradually expand under the category of environment, this paper studies how to use information technology tools to construction quality supervision and management system that focuses on the quality of supervision and project management, quality control process management, quality monitoring statistics report management, platform management-related content in four areas. Through the construction quality supervision and management system, to better enhance the quality of electric power enterprise management level, to ensure that the material quality, quantity of time and supplies. strengthening quality supervision and management can not only effectively reduce material procurement costs, but also enhance the competitiveness of enterprises.

An experiment on digital library based on the method of TQM system

The principles and methods of TQM (total quality management) were applied to digital library management. TQM puts emphasis on process control and continual improvement. The TQM theories and measures explained clearly in this paper were the scientific tools used in the experiment in the Wenzhou University Digital Library. This paper deals with a very broad range of subjects related to a digital library: system model of TQM for digital library, organization structure, and tasks of Wenzhou University Digital Library, task flow chart of electronic reading room, cause and effect of electronic reading room quality man- agement, systematic model of enhancing electronic information acquisition rate, quality comparison of electronic reading room service, etc.

Quality Management Model Embodying Circular Economy and Sustainable Manufacture - Quality Concept Models Based on a Chinese Traditional Cultural Principle

Based on circular economy and sustainable manufacture theories, the drawbacks in the existing quality management models are analyzed. The requests that satisfy the big system 'environment-society-economy' are summarized to build up a model. A Chinese traditional cultural principle is applied and the relevant contents are sublimated as the platform to set up the model. The new quality management concept models are put forward: 'T-D-R' three dimension structures and 'ecological quality loop' model, from which the new quality concepts are formed. The paper elaborates the contents and the process of setting up the models. The big system quality problems can be handled by the new quality concept and model that are validated in practice.

Empirical Analysis for High Quality Software Development

It remains important for a development organization to configure a software process that enables it to develop software products with the least possible number of defects after shipment. A development organization of CMMI level 5 has, over three years, been strived to improve those software projects that had been noted as having many defects after shipment. In this paper, we discuss our organization’s improvement (Kaizen) activities, to analyze the important matters of software process to be considered when developing a software product with the least possible number of defects after shipment. Our results are identified by three important points;1) early ensured quality by defect detection during design or code review;2) quality assurance for both process quality and product one;and 3) quantitative management by which data of the appropriate resolution can be collected at an appropriate timing.

HV Process Model of Software Development

Software Development Life Cycle (SDLC) is one of the major ingredients for the development of efficient software systems within a time frame and low-cost involvement. From the literature, it is evident that there are various kinds of process models that are used by the software industries for the development of small, medium and long-term software projects, but many of them do not cover risk management. It is quite obvious that the improper selection of the software development process model leads to failure of the software products as it is time bound activity. In the present work, a new software development process model is proposed which covers the risks at any stage of the development of the software product. The model is named a Hemant-Vipin (HV) process model and may be helpful for the software industries for development of the efficient software products and timely delivery at the end of the client. The efficiency of the HV process model is observed by considering various kinds of factors like requirement clarity, user feedback, change agility, predictability, risk identification, practical implementation, customer satisfaction, incremental development, use of ready-made components, quick design, resource organization and many more and found through a case study that the presented approach covers many of parameters in comparison of the existing process models. .

The Report of Virtual Exhibition Software Development

The main structure and key techniques of our Virtual Exhibition Software are summarized. It demonstrates the practice of Software Engineering during the development of our project and discusses the use of UML in it.

基于Delphi法构建手术室围术期低体温预防管理评价指标体系

目的 构建手术室围术期低体温预防管理评价指标体系。方法 2022年2月,以结构-过程-结果三维质量评价模式为理论框架,参考相关文献拟定手术室围术期低体温预防管理评价指标体系,采用德尔菲法对来自手术室护理管理、院内感染、麻醉领域的23名专家进行2轮专家函询,采用优序图法确定指标权重系数。结果 2轮专家函询的积极系数分别为100.0%和95.7%,专家权威系数分别为0.946和0.934,各项指标变异系数(CV)均<0.25,Kendall’s W值分别为0.419和0.359(均P<0.001),最终构建了包含3项一级指标、9项二级指标、53项三级指标的手术室围术期低体温预防管理评价指标体系。结论基于Delphi法构建手术室围术期低体温预防管理评价指标体系有较好的科学性和可靠性,可为手术室护理管理者提供参考,有利于临床开展科学、规范、统一的质量评价。

城市医疗集团门诊质量管理指标体系构建研究

目的:构建城市医疗集团门诊质量管理指标体系,为规范和提高城市医疗集团整体的门诊质量提供循证管理依据。方法:以“结构-过程-结果”模型为理论框架,通过文献回顾形成初级指标池,采用德尔菲专家咨询法对20位专家开展两轮次函询,根据函询结果对指标体系进行修改完善。结果:两轮次函询问卷有效回收率100.0%,专家权威系数均大于0.75,KendallW协调系数为0.13~0.39,最终构建的城市医疗集团门诊质量管理指标体系共包括3个一级指标、15个二级指标、46个三级指标。结论:本研究构建的城市医疗集团门诊质量管理指标体系全面、科学、实用,为城市医疗集团门诊同质化管理、搭建连续性服务、医疗流程优化、质量考核评价提供循证依据。

水利工程质量监督全过程全方位定量评价模型构建

为促进我国水利工程质量监督管理工作运行的高效化,确保工程监督的有效性和权威性,基于AHP(analytic hierarchy process)原理,针对水利部督查小组的现场检查情况,依据水利部下达的相关文件,结合负分制和一票否决制,将定性问题定量化,构建一套涉及水利工程建设、运行、管理全过程全方位的质量监督管理评价模型,共包含7层2112个指标。在综合试错的基础上,计算得出不同层级和不同指标的权重,然后选用该模型分析评价2020年7个省份受督查水利工程项目的质量管理与安全生产管理监督数据,间接说明模型的实用性和易操作性。评价结果表明:7个省份均在合格以上,整体质量管理情况较好,但得分差异显著,其中最高得分90.6、最低得分65.6,相差25分;不同类型管理评价结果显示,安全生产管理得分普遍高于质量管理得分;各参建单位评价结果显示,建设单位和勘察设计单位的情况最优、评分基本达到满分,而质量检测单位和施工单位得分最低、需重点加强相关监管。评价结果为水利工程监督管理工作提供了科学的数据支撑,构建的评价模型也为水利工程质量监督定量化提供了易实操的普适性工具。

基于定位二维码技术构建急性缺血性脑卒中流程管理模式

目的基于定位二维码技术构建急性缺血性脑卒中流程管理模式,并探索其临床应用价值。方法比较管理模式应用前后急性缺血性脑卒中患者静脉溶栓总用时及各时间节点用时、住院天数及住院费用等,同时比较模式应用前后急诊科护士护理记录书写用时、书写错误及缺陷等。结果基于定位二维码技术构建的急性缺血性脑卒中流程能有效缩短DNT(P<0.001),模式应用后护理记录书写时间明显缩短(P<0.001),书写质量提高。结论通过定位二维码技术可实现流程数据精确抓取,在生成流程时间轴的同时可生成相应护理记录,为卒中流程质量改进提供了数据支持,对高级卒中中心的建立有借鉴价值。

品质导向的粮油食品精准加工分子基础与调控

粮油是国家最重要的战略物资,粮油食品产业在国民经济中起着基础作用,深度关系着国计民生和国民健康。粮食和油料中营养组分丰富及其多尺度结构复杂,且加工方式多变,进而影响粮油食品的感官、安全特性和消化吸收、营养健康效应。本文通过系统梳理粮油食品发展现状及产业战略意义,品质导向的粮油食品加工与制造发展现状及面临的挑战,提出从粮油食品的加工过程控制,营养组分多尺度结构变化与结构重构,多维度品质特性调控3个角度,系统解析基于品质导向的粮油食品精准加工的结构基础与调控机制,重点探讨粮油食品中主要营养组分的加工适应性、互作机制,粮油食品加工对感官品质、健康品质和安全品质等品质特性的影响,多维品质与加工过程构效关系与关联调控机制等制约粮油食品未来发展的研究方向,以期建立品质导向的粮油食品精准加工的理论基础、技术方法和新型绿色加工策略,为创制感官、安全和健康品质协同提升的营养健康粮油食品提供理论支撑,推动我国粮油食品加工产业的高质量发展。