基于ANSYS 6 Sigma的变速器滚动轴承动态可靠性分析

为研究变速器滚动轴承的动态可靠性,以5T136变速器为原型,应用ANSYS软件建立深沟球滚动轴承的有限元模型。对滚动轴承进行模态分析,发现前6阶发生共振的可能性很小;经过静力学有限元分析,发现轴承最大等效应力发生在滚动体,为233.36 MPa,最大变形发生在内圈,为0.0033111 mm;使用6 Sigma模块进行动态可靠性分析,杨氏模量大于225.87 MPa的可靠度为99.993%,轴承运行安全可靠。

6Sigma联合手供一体化管理在手术室腔镜器械管理中的应用

目的探讨6Sigma联合手供一体化管理在手术室腔镜器械管理中的应用效果。方法抽取2022年1月至2023年10月医院手术室的300件腔镜器械,随机分为观察组和对照组,各150件。对照组予手供一体化管理,观察组在对照组基础上予6Sigma管理。比较两组器械管理质量、器械不良事件、器械损耗情况和医师满意度。结果观察组器械准备准确率、清洗消毒合格率及物品包装合格率较对照组更高,差异有统计学意义(P<0.05);观察组器械遗失、零件脱落及断裂损坏率较对照组更低,差异有统计学意义(P<0.05);观察组器械维修及器械更换率较对照组更低,差异有统计学意义(P<0.05);观察组医师满意度高于对照组,差异有统计学意义(P<0.05)。结论6Sigma联合手供一体化管理用于手术室腔镜器械管理中,能提高器械管理质量,降低器械不良事件率,减少器械损耗,提高医师满意度。

6Sigma在特细砂混凝土质量管控中的应用研究

探索6 Sigma在特细砂混凝土质量管控中的应用,并分析其效果和优势。采用系统分析和统计方法对实际工程案例进行深入研究,统计分析特细砂混凝土质量的关键指标,并针对这些指标进行管控和改进措施。结果表明,通过引入6 Sigma方法,特细砂混凝土质量得到了显著提升,出现质量问题的概率得到有效降低,并且可靠性和稳定性得到了显著提高。

Endogenous Security-Aware Resource Management for Digital Twin and 6G Edge Intelligence Integrated Smart Park

The integration of digital twin(DT)and 6G edge intelligence provides accurate forecasting for distributed resources control in smart park.However,the adverse impact of model poisoning attacks on DT model training cannot be ignored.To address this issue,we firstly construct the models of DT model training and model poisoning attacks.An optimization problem is formulated to minimize the weighted sum of the DT loss function and DT model training delay.Then,the problem is transformed and solved by the proposed Multi-timescAle endogenouS securiTy-aware DQN-based rEsouRce management algorithm(MASTER)based on DT-assisted state information evaluation and attack detection.MASTER adopts multi-timescale deep Q-learning(DQN)networks to jointly schedule local training epochs and devices.It actively adjusts resource management strategies based on estimated attack probability to achieve endogenous security awareness.Simulation results demonstrate that MASTER has excellent performances in DT model training accuracy and delay.

Optimizing Resource Management for IoT Devices in Constrained Environments

Embedded computing device implementation on the Internet of Things (IoT) requires careful assessment of their intrinsic resource limitations. These constraints are not limited to memory and processing capabilities but extend to the network interfaces, particularly due to the low-power radio standards that these devices typically employ. The IPv6 protocol is shown to be a strong option for guaranteeing interoperability in the IoT, mostly because of its large address space, the range of current IP-based protocols, and its intrinsic versatility. Considering these benefits, we investigate if current IP-based network management protocols can be implemented on devices with limited resources. We investigate the resource needs in particular for implementing Network Configuration Protocol (NETCONF) and Simple Network Management Protocol (SNMP) on an 8-bit AVR-based device. Our investigation reveals the specific memory and processing demands of these protocols, providing valuable insights into their practicality and efficiency in constrained IoT environments. This study underscores the potential and challenges of leveraging IPv6-based network management protocols to enhance the functionality and interoperability of IoT devices while operating within stringent resource limitations.

Ultra Dense Satellite-Enabled 6G Networks:Resource Optimization and Interference Management

With the evolution of the sixth generation(6G)mobile communication technology,ample attention has gone to the integrated terrestrial-satellite networks.This paper notes that four typical application scenarios of integrated terrestrial-satellite networks are integrated into ultra dense satellite-enabled 6G networks architecture.Then the subchannel and power allocation schemes for the downlink of the ultra dense satellite-enabled 6G heterogeneous networks are introduced.Satellite mobile edge computing(SMEC)with edge caching in three-layer heterogeneous networks serves to reduce the link traffic of networks.Furthermore,a scheme for interference management is presented,involving quality-of-service(QoS)and co-tier/cross-tier interference constraints.The simulation results show that the proposed schemes can significantly increase the total capacity of ultra dense satellite-enabled 6G heterogeneous networks.

4R危机管理理论在结缔组织病相关肺动脉高压患者6分钟步行试验中的应用效果

目的:评价4R危机管理理论在结缔组织病相关肺动脉高压患者进行6分钟步行试验中的效果。方法:便利选取120例2022年1月—12月在北京协和医院风湿免疫内科肺动脉高压专病门诊就诊的结缔组织病相关肺动脉高压行6分钟步行试验的患者,按时间先后进行分组,对照组给予常规管理流程,干预组应用4R危机管理理论更新的6分钟步行试验管理流程。针对6分钟步行试验后两组患者的血氧饱和度情况及不良事件发生情况进行分析。结果:干预组和对照组患者6分钟步行距离差异无统计学意义(P>0.05);干预组患者6分钟步行试验后及测试后3分钟血氧饱和度显著高于对照组(P<0.05);干预组患者6分钟步行试验期间低氧饱和度及不良事件发生情况显著少于对照组(P<0.05)。结论:结缔组织病相关肺动脉高压行6分钟步行试验患者经4R危机管理理论干预能够显著降低低氧饱和度发生率,降低患者不良反应发生率,该方案为结缔组织病相关肺动脉高压患者实施6分钟步行试验提供了安全保障。

Blockchain-enabled resource management and sharing for 6G communications

The sixth-generation(6G)network must provide better performance than previous generations to meet the requirements of emerging services and applications,such as multi-gigabit transmission rate,higher reliability,and sub-1 ms latency and ubiquitous connection for the Internet of Everything(IoE).However,with the scarcity of spectrum resources,efficient resource management and sharing are crucial to achieving all these ambitious requirements.One possible technology to achieve all this is the blockchain.Because of its inherent properties,the blockchain has recently gained an important position,which is of great significance to the 6G network and other networks.In particular,the integration of the blockchain in 6G will enable the network to monitor and manage resource utilization and sharing efficiently.Hence,in this paper,we discuss the potentials of the blockchain for resource management and sharing in 6G using multiple application scenarios,namely,Internet of things,deviceto-device communications,network slicing,and inter-domain blockchain ecosystems.

A three-level mobility management scheme for hierarchical mobile IPv6 networks

Performance evaluation shows that Hierarchical Mobile IPv6 (HMIPv6) cannot outperform standard Mobile IPv6 (MIPv6) in all scenarios. Thus, adaptive protocol selection under certain circumstances is desired. Moreover, it is necessary to balance the load among different Mobility Anchor Points (MAPs). This paper proposes an efficient three-level hierarchical ar- chitecture for mobility management in HMIPv6 networks, in which a mobile node (MN) may register with either a higher/lower MAP or its home agent according to its speed and the number of connecting correspondent nodes (CNs). An admission control algorithm and a replacement algorithm are introduced to achieve load balancing between two MAP levels and among different MAPs within the same MAP level. Admission control is based on the number of CNs but not MNs that an MAP serves. In case there is no capacity for an MN, the MAP chooses an existing MN to be replaced. The replaced MN uses the MAP selection al- gorithm again to choose another mobility agent. Simulation results showed that the proposed scheme achieves better performance not only in reducing the signaling overhead, but also in load balancing among different MAPs.

Energy-efficient resource management for CCFD massive MIMO systems in 6G networks

This paper presents a co-time co-frequency fullduplex(CCFD)massive multiple-input multiple-output(MIMO)system to meet high spectrum efficiency requirements for beyond the fifth-generation(5G)and the forthcoming the sixth-generation(6G)networks.To achieve equilibrium of energy consumption,system resource utilization,and overall transmission capacity,an energy-efficient resource management strategy concerning power allocation and antenna selection is designed.A continuous quantum-inspired termite colony optimization(CQTCO)algorithm is proposed as a solution to the resource management considering the communication reliability while promoting energy conservation for the CCFD massive MIMO system.The effectiveness of CQTCO compared with other algorithms is evaluated through simulations.The results reveal that the proposed resource management scheme under CQTCO can obtain a superior performance in different communication scenarios,which can be considered as an eco-friendly solution for promoting reliable and efficient communication in future wireless networks.

基于6 sigma的镀铜均匀性改善研究

伴随着电子技术的飞速发展,作为电子元件之母的PCB结构也朝着高密度、高集成、细线路、小孔径不断高速前进。PCB电镀工序作为精细线路制作前制程工序,铜厚均匀性直接影响精细线路制程的良率。对于75μm及以下线宽/线距铜厚极差超出8μm则会给线路蚀刻带来局部蚀刻不净及线幼并存的风险。本文研究6 sigma质量管理在电镀镀铜均匀性工艺参数优化的运用。通过收集电镀制程不同参数,在拟合回归模型中分析不同因子贡献率,得出阳极浮架参数设定为主要影响因子。并设计DOE因子实验表,通过实验验证并优化阳极浮架设定参数来改善镀铜均匀性。最终镀铜20μm铜厚极差可控制在5μm内,实际产品验证亦可达到预期改善目标。

Blockchain-Based Decentralized Reputation Management System for Internet of Everything in 6G-Enabled Cybertwin Architecture

Internet of Everything(IoE)has emerged as a promising paradigm for the purpose of connecting and exchanging data among physical objects and humans over the Internet,and it can be widely applied in the fields of industry,transportation,commerce,and education.Recently,the emergence of 6G-enabled cybertwin network architecture provides the technical and theoretical foundation for the realization of IoE paradigm.However,the IoE has three open issues in the 6G-enabled cybertwin architecture,i.e.,data authenticity,data storage and node reliability.To address these issues,we propose a blockchain-based decentralized reputation management system(BC-DRMS)for IoE in 6G-enabled Cybertwin architecture.In the proposed BC-DRMS,the traffic data collected from end nodes is stored on the blockchain and the decentralized file system,i.e.,InterPlanetary File System(IPFS),to resist data tampering,and then the data is further processed by the edge clouds and core clouds to provide services to users.Also,a multi-level reputation evaluation scheme is designed to compute the reputation scores of IoE nodes to prevent malicious node attacks.The experiment results and analysis demonstrate that,compared to the traditional centralized reputation management systems(CRMS),the proposed BC-DRMS cannot only address the issues of data authenticity and storage,but also provides high reliability for IoE in 6G-enabled cybertwin architecture.

Obstacles to the Integrated Care of Children Aged 6 to 59 Months Suffering from Acute and Severe Malnutrition at the Chu-Me and HATC of N’Djamena/Chad

Introduction: the problem of Severe Acute Malnutrition (SAM) and its consequences concern and challenge all social actors worldwide. The objective of the study was to identify the real obstacles that actors face in the integrated management of children aged 6 - 59 months suffering from SAM at the University Hospital of Mother and Child (CHUME) and the Chad-China Friendship Hospital (HATC) of N’Djamena. Methodology: this is a cross-sectional descriptive and interpretative study conducted from January to October 2023 at the CHUME and HATC of N’Djamena. It is based on questionnaires and direct observation of two hundred and thirty-six (236) parents or guardians of malnourished children admitted to these health facilities. All 236 agreed to participate freely in this study. Results: it appears from this study that the obstacles to the integrated management of malnourished children were: poor care-care relationship (26.7%) permanent product breaks (22.9%), the direct costs of services ranged from 30,000 to 60,000 FCFA (41.53%), drugs used for the treatment of patients came from the street (66.10%), malaria and anemia occupy an important place (27.5%), 57.2% respondents had monthly income below 60,000 CFAF. Conclusion: the present study carried out has identified the real bottlenecks to the integrated management of children suffering from SAM in the therapeutic nutritional units of the city of N’Djamena. .

Study on Application Effect of 6S Management Mode in Infection Control Management of Fangcang Shelter Hospital of National Exhibition and Convention Center

Objective:In 2022,a pneumonia caused by novel coronavirus broke out in Shanghai.A large number of medical personnel were deployed nationwide to support the Fangcang Shelter Hospital of National Exhibition and Convention Center(Shanghai).Because the of the underdeveloped infrastructure and the disorganized layout process,the phenomenon of infection among medical personnel was rampant given the highly contagious nature of the Omicron variant.This paper discusses the effect of 6S management in infection control management of Fangcang Shelter Hospital of National Exhibition and Convention Center(Shanghai).Methods:A series of 6S management practices were carried out based on the evaluation of the control management of Fangcang Shelter Hospital of National Exhibition and Convention Center(Shanghai)during the anti-epidemic period,and the effect of the implementation of 6S management was studied based on the rapport among team members and the overall control system process,the management of wearing and stripping channels,the time of wearing protective articles and the psychological and emotional changes of the team members.Results:After the implementation of 6S management mode,the management of dressing room,epidemic prevention materials,and occupational protection awareness and infection control safety were significantly improved.More than 95.5%of the team members believed that improving the working environment in the shelter increased the confidence of victory in the fight against the epidemic,reduced the preparations before entering and leaving the cabin,improved the work efficiency and ensured occupational safety.It ensures the realization of the goal of“zero infection”and is set as a benchmark of control work of Fangcang Shelter Hospital of National Exhibition and Convention Center(Shanghai).Conclusion:The application of 6S management mode to the shelter infection control management can create and maintain a good working environment in the shelter,promote the implementation effect of various systems and processes of infection control,reduce the potential infection risk in the shelter and improve the efficiency of infection control management.

A Novel Location Management Scheme based on DNS in Proxy Mobile IPv6

Proxy Mobile IPv6 (PMIPv6) is designed to provide a network-based localized mobility management protocol, but it does not handle the global mobility of hosts. In this paper, we propose a location management scheme based on Domain Name System (DNS) for PMIPv6 which can support global mobility by using DNS as a location manager. In addition, to support large numbers of mobile terminals and enhance network scalability a paging extension scheme is introduced to PMIPv6. To evaluate the proposed location management scheme, we establish an analytical model, formulate the location update cost and the paging cost, and analyze the influence of the different factors on the total signaling cost. The performance results show that our proposed scheme outperforms the basic PMIPv6 under various parameters in terms of reducing the signaling overhead and the proposed scheme reduces signaling overhead compared to the basic PMIPv6.

Security Policy Management Process within Six Sigma Framework

This paper presents a management process for creating adaptive, real-time security policies within the Six Sigma (6σ) framework. A key challenge for the creation of a management process is the integration with models of known Industrial processes. One of the most used industrial process models is Six Sigma which is a business management model wherein customer centric needs are put in perspective with business data to create an efficient system. The security policy creation and management process proposed in this paper is based on the Six Sigma model and presents a method to adapt security goals and risk management of a computing service. By formalizing a security policy management process within an industrial process model, the adaptability of this model to existing industrial tools is seamless and offers a clear risk based policy decision framework. In particular, this paper presents the necessary tools and procedures to map Six Sigma DMAIC (Define-Measure-Analyze-Improve-Control) methodology to security policy management.

A Six Sigma Security Software Quality Management

Today, the demand for security software is Six Sigma quality, i.e. practically zero-defects. A practical and stochastic method is proposed for a Six Sigma security software quality management. Monte Carlo Simulation is used in a Six Sigma DMAIC (Define, Measure, Analyze, Improve, Control) approach to security software testing. This elaboration used a published real project’s data from the final product testing lasted for 15 weeks, after which the product was delivered. The experiment utilised the first 12 weeks’ data to allow the results verification on the actual data from the last three weeks. A hypothetical testing project was applied, supposed to be completed in 15 weeks. The product due-date was Week 16 with zero-defects quality assurance aim. The testing project was analysed at the end of the 12th week with three weeks of testing remaining. Running a Monte Carlo Simulation with data from the first 12 weeks produced results which indicated that the product would not be able to meet its due-date with the desired zero-defects quality. To quantify an improvement, another simulation was run to find when zero-defects would be achieved. Simulation predicted that zero-defects would be achieved in week 35 with 56% probability, and there would be 82 defects from Weeks 16 - 35. Therefore, to meet the quality goals, either more resources should be allocated to the project, or the deadline for the project should be moved to Week 36. The paper concluded that utilising Monte Carlo Simulations in a Six Sigma DMAIC structured framework is better than conventional approaches using static analysis methods. When the simulation results were compared to the actual data, it was found to be accurate within ﹣3.5% to +1.3%. This approach helps to improve software quality and achieve the zero-defects quality assurance goal, while assigning quality confidence levels to scheduled product releases.

Research and Design of IPv6 Network Management and Operations Support System

IPv6 is the foundation of the development of Next Generation Internet (NGI). An IPv6 network management and operations support system is necessary for real operable NGI. Presently there are no approved standards yet and relevant equipment interfaces are not perfect. A Network Management System (NMS) at the network layer helps implement the integrated management of a network with equipment from multiple vendors, including the network resources and topology, end-to-end network performance, network failures and customer Service Level Agreement (SLA) management. Though the NMS will finally realize pure IPv6 network management, it must be accommodated to the management of relevant IPv4 equipment. Therefore, modularized and layered structure is adopted for the NMS in order to implement its smooth transition.

6Sigma联合手供一体化模式对腹腔镜器械管理质量的影响

目的探究6Sigma联合手供一体化模式对手术室腹腔镜器械管理质量的应用效果。方法将2020年7月至2021年2月,成都医学院第一附属医院手术室腹腔镜器械开始实施6Sigma联合手供一体化管理,计为“实施后”;回顾性收集2019年11月至2020年6月该院常规管理期间腹腔镜器械管理相关数据,计为“实施前”,对比实施前后护理人员腹腔镜器械相关知识掌握情况、器械维护质量、分离钳/无损伤钳更换率及遗失率、手术人员满意度。结果与实施前比较,实施后护理人员对腹腔镜器械相关知识掌握程度评分增高(P<0.05);腹腔镜器械清洗、包装、消毒评分增高(P<0.05);器械的更换率、遗失率均降低(P<0.05);手术室医生对器械准备、使用效果、护士配合情况的满意度均升高(P<0.05)。结论6Sigma联合手供一体化管理模式可提高手术室腹腔镜器械管理质量,降低不必要的医疗设施损耗,提高灭菌合格率。

基于6SIGMA理论的建筑施工现场安全管理方法

为提高建筑施工企业的现场作业安全管理水平,针对建筑施工现场事故高发的特点,将6SIGMA管理理论应用于安全管理研究。以建筑施工高处坠落事故为研究对象。建立高处坠落事故DMAIC模型。从项目选题与定义、测量、分析、改进和控制5个环节,研究6SIGMA管理方法和建筑施工安全管理的融合。利用鱼刺图和故障类型影响分析,找出其关键影响因素。研究结果表明,作业时间与季节(X1),建筑安全法规体系(X2),脚手架相关技术要求(X3)及强风、浓雾、雨雪等天气情况(X4)是导致建筑施工高处坠落事故的4个关键影响因素。在此基础上,提出改进方案。