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“6T”实务管理在高校学生公寓现场管理中的应用——以云南省某高校为例
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作者 张志新 王玉 《价值工程》 2025年第1期146-149,共4页
随着高等学校的改革发展,学生公寓管理工作值得关注。结合云南省某高校学生公寓管理现状分析可知,目前我国高等学校学生公寓工作存在一些问题,如员工流动性大、整体素质不高,学生安全意识淡薄,安全事件时有发生,缺乏有效的管理措施,学... 随着高等学校的改革发展,学生公寓管理工作值得关注。结合云南省某高校学生公寓管理现状分析可知,目前我国高等学校学生公寓工作存在一些问题,如员工流动性大、整体素质不高,学生安全意识淡薄,安全事件时有发生,缺乏有效的管理措施,学生公寓的服务与学生对美好生活的需求有差距。实施学生公寓6T实务管理后,员工队伍稳定、素质普遍提高,有效防范和化解各类风险,实现学生公寓由单一公寓向综合社区转变,提升学生公寓的管理水平和服务质量,满足学生多样化、个性化校园生活需求。 展开更多
关键词 高校 学生公寓 6t管理 应用
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The Improving Effects of Diabetes Education on Diabetes Awareness and Management in Children and Adolescents with T1DM
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作者 Salah Alzawahreh Candan Ozturk 《Open Journal of Nursing》 2024年第4期164-175,共12页
Background: Diabetes education is crucial in empowering persons with Type 1 diabetes (T1DM) and their families to properly manage the condition by providing comprehensive knowledge, tools, and support. It boosts one’... Background: Diabetes education is crucial in empowering persons with Type 1 diabetes (T1DM) and their families to properly manage the condition by providing comprehensive knowledge, tools, and support. It boosts one’s belief in their ability to succeed, encourages following medical advice, and adds to the general enhancement of health. Objective: This study is to investigate the effectiveness of diabetes education in empowering individuals with Type 1 Diabetes Mellitus (T1DM) and their families to effectively manage the condition. Furthermore, it strives to improve nursing care for families whose children have been diagnosed with Type 1 Diabetes Mellitus (T1DM). Design: This research study investigates the efficacy of diabetes education in empowering individuals with Type 1 Diabetes Mellitus (T1DM) and their families to effectively handle the condition. Materials and Methods: A systematic search was conducted between the years 2000 and 2022, utilizing the Medline and Google Scholar databases. The purpose of the search was to uncover relevant papers pertaining to diabetes education, management of Type 1 Diabetes Mellitus (T1DM), nurse care, and empowerment. The search focused on peer-reviewed research, clinical trials, and scholarly articles that evaluated the efficacy of diabetes education in empowering individuals and families. Results: Diabetes education is crucial for understanding and controlling T1DM. It includes personalized sessions, webinars, group classes, and clinics that provide customized therapies. Comprehensive education enhances glycemic control and family dynamics. Nevertheless, the implementation of diabetes education for families requires specific standards, especially in the field of nursing. Conclusion: Diabetes education is essential for effectively managing Type 1 Diabetes Mellitus (T1DM), providing patients and families with crucial knowledge, resources, and confidence. It encourages independence in-home care and provides explicit guidelines for diabetic nurses to improve nursing care. 展开更多
关键词 Diabetes Education Family-Centered Empowerment Model Self-Care management SELF-EFFICACY type 1 Diabetes (t1D)
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Optimizing Resource Management for IoT Devices in Constrained Environments
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作者 Sadia Islam Nilima Md Khokan Bhuyan +3 位作者 Md Kamruzzaman Jahanara Akter Rakibul Hasan Fatema Tuz Johora 《Journal of Computer and Communications》 2024年第8期81-98,共18页
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... 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. 展开更多
关键词 Internet of things Resource Constraint IPv6 Protocol IP-Based Network management Network management Protocol Network Configuration Protocol
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Blockchain-enabled resource management and sharing for 6G communications 被引量:11
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作者 Hao Xu Paulo Valente Klaine +3 位作者 Oluwakayode Onireti Bin Cao Muhammad Imran Lei Zhang 《Digital Communications and Networks》 SCIE 2020年第3期261-269,共9页
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 s... 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. 展开更多
关键词 6G Blockchain Resource management Network slicing Wireless blockchain
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Endogenous Security-Aware Resource Management for Digital Twin and 6G Edge Intelligence Integrated Smart Park 被引量:3
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作者 Sunxuan Zhang Zijia Yao +3 位作者 Haijun Liao Zhenyu Zhou Yilong Chen Zhaoyang You 《China Communications》 SCIE CSCD 2023年第2期46-60,共15页
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 cann... 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. 展开更多
关键词 smart park digital twin(Dt) 6G edge intelligence resource management endogenous security awareness
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A three-level mobility management scheme for hierarchical mobile IPv6 networks 被引量:1
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作者 WAN Zheng PAN Xue-zeng +1 位作者 CHEN Jian CUI Yu-zeng 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第12期2118-2126,共9页
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, ... 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. 展开更多
关键词 Mobile IPv6 Mobility management Admission control Load control
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Energy-efficient resource management for CCFD massive MIMO systems in 6G networks 被引量:1
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作者 SU Yumeng GAO Hongyuan ZHANG Shibo 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2022年第4期877-886,共10页
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 si... 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. 展开更多
关键词 the sixth-generation(6G) massive multiple-input multiple-output(MIMO) co-time co-frequency full-duplex ENERGY-EFFICIENt resource management
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Blockchain-Based Decentralized Reputation Management System for Internet of Everything in 6G-Enabled Cybertwin Architecture 被引量:2
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作者 Meimin Wang Zhili Zhou Chun Ding 《Journal of New Media》 2021年第4期137-150,共14页
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 indust... 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. 展开更多
关键词 6G blockchain cybertwin network reputation management system Internet of Everything
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Study on Application Effect of 6S Management Mode in Infection Control Management of Fangcang Shelter Hospital of National Exhibition and Convention Center 被引量:1
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作者 Ting Sun Jing Feng +3 位作者 Ning Han Ni Li Zhi Zan Dongxian Zhang 《Journal of Clinical and Nursing Research》 2022年第5期84-93,共10页
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 Conventi... 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. 展开更多
关键词 Mobile cabin hospital Infection control management 6S management Application effect
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A Novel Location Management Scheme based on DNS in Proxy Mobile IPv6
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作者 Qiu Feng Li Xiaoqian Su Wei Zhang Hongke 《China Communications》 SCIE CSCD 2010年第3期43-52,共10页
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 bas... 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. 展开更多
关键词 COMPONENt Proxy Mobile IPv6 location manager mobility management PAGING
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Ultra Dense Satellite-Enabled 6G Networks:Resource Optimization and Interference Management
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作者 Xiangnan Liu Haijun Zhang +3 位作者 Min Sheng Wei Li Saba Al-Rubaye Keping Long 《China Communications》 SCIE CSCD 2023年第10期262-275,共14页
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 integ... 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. 展开更多
关键词 satellite-enabled 6G networks network architecture resource optimization interference management
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Research and Design of IPv6 Network Management and Operations Support System
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作者 Chen Bin Ji Wenchong Qiu Zhonghui (China Network Communications Group Corporation, Beijing 100032, China) 《ZTE Communications》 2006年第1期16-20,共5页
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 a... 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. 展开更多
关键词 work Research and Design of IPv6 Network management and Operations Support System Design RFC IEtF NMS MIB RMON NGI SNMP ICMP
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一种4 GHz瞬时带宽的6~18 GHz超宽带T/R组件设计
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作者 王洁 武华锋 +2 位作者 李宁 廖原 周生华 《电子科技》 2024年第8期97-102,共6页
针对现代电子对抗设备的大瞬时带宽要求,文中设计了一种瞬时带宽4 GHz的6~18 GHz超宽带T/R组件。采用砖块式多芯片组件(Multi-Chip Module,MCM)和超宽带信号传输等技术实现了T/R组件高集成、小型化和模块化的要求。对T/R组件组成构架、... 针对现代电子对抗设备的大瞬时带宽要求,文中设计了一种瞬时带宽4 GHz的6~18 GHz超宽带T/R组件。采用砖块式多芯片组件(Multi-Chip Module,MCM)和超宽带信号传输等技术实现了T/R组件高集成、小型化和模块化的要求。对T/R组件组成构架、收发通道指标预算、宽带信号传输特性仿真和电磁兼容性设计进行了详细描述。测试结果显示,T/R组件在12 GHz工作带宽内具有良好的性能,发射功率大于35 dBm,接收增益大于20 dB,噪声系数小于5 dB,延时总量达762 ps。 展开更多
关键词 t/R组件 超宽带 6~18 GHz 延时 多芯片组件 微波单片集成电路
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T淋巴细胞亚群、IL-6在胃癌患者中的表达及其与预后的相关性
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作者 周光婷 王刚 《国际医药卫生导报》 2024年第15期2585-2589,共5页
目的分析外周血T淋巴细胞亚群及白细胞介素-6(interleukin-6,IL-6)在胃癌患者中的表达,探究其与预后的相关性。方法选取2021年6月至2023年6月连云港市第二人民医院收治的106例胃癌患者为试验组,入院次日检测其外周血T淋巴细胞亚群(CD3^... 目的分析外周血T淋巴细胞亚群及白细胞介素-6(interleukin-6,IL-6)在胃癌患者中的表达,探究其与预后的相关性。方法选取2021年6月至2023年6月连云港市第二人民医院收治的106例胃癌患者为试验组,入院次日检测其外周血T淋巴细胞亚群(CD3^(+)、CD4^(+)、CD8^(+))及IL-6水平。选取同时段于连云港市第二人民医院进行体检的健康者80例为对照组,体检当日检测其外周血T淋巴细胞亚群及IL-6水平。比较两组T淋巴细胞亚群及IL-6水平。胃癌患者院外随访6个月,根据患者死亡、存活情况将其分为预后不良组(17例)、预后良好组(89例)。预后不良组男10例(58.82%),女7例(41.18%),年龄(60.47±5.89)岁;文化程度:中学及以上9例(52.94%),中学以下8例(47.06%)。预后良好组男55例(61.80%),女34例(38.20%),年龄(60.08±5.71)岁;文化程度:中学及以上32例(35.96%),中学以下57例(64.04%)。logistic回归分析影响胃癌患者预后的因素。采用受试者操作特征曲线(ROC)评估外周血T淋巴细胞亚群及IL-6预测胃癌患者预后的价值。采用t检验和χ^(2)检验。结果试验组CD3^(+)、CD4^(+)水平低于对照组[(55.27±8.72)%比(68.97±6.45)%、(26.42±10.21)%比(38.12±5.07)%],CD8^(+)、IL-6水平高于对照组[(33.36±6.02)%比(24.66±3.75)%、(6.97±3.29)ng/L比(3.62±1.01)ng/L],差异均有统计学意义(t=-11.821、-9.413、11.360、8.803,均P<0.05)。预后不良组CD3^(+)、CD4^(+)水平低于预后良好组[(45.12±10.06)%比(57.21±6.97)%、(20.01±10.12)%比(27.64±9.81)%],CD8^(+)、IL-6水平、肿瘤分期Ⅳ期患者占比高于预后良好组[(40.12±6.01)%比(32.07±5.12)%、(9.75±3.16)ng/L比(6.44±3.05)ng/L、70.59%(12/17)比32.58%(29/89)],差异有统计学意义(t=-6.068、-2.924、5.774、4.077,χ^(2)=8.692,均P<0.05)。logistic回归分析显示,肿瘤分期、CD3^(+)、CD8^(+)、IL-6水平是影响胃癌患者预后的因素(均P<0.05)。CD3^(+)、CD8^(+)、IL-6预测患者预后不良的ROC下面积分别为0.847、0.853、0.768。结论胃癌患者CD3^(+)、CD4^(+)低表达,CD8^(+)及IL-6高表达。CD3^(+)、CD8^(+)、IL-6水平是影响胃癌患者预后的因素。 展开更多
关键词 胃癌 外周血t淋巴细胞亚群 白细胞介素-6 预后
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T6态热挤压Al-5Cu-0.8Mg-0.15Zr-0.2Sc-0.5Ag合金的低周疲劳行为
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作者 王莹 陈立佳 +2 位作者 周舸 张浩宇 张思倩 《沈阳工业大学学报》 CAS 北大核心 2024年第1期77-81,共5页
为了揭示经过T6处理的热挤压Al-5Cu-0.8Mg-0.15Zr-0.2Sc-0.5Ag合金在不同温度下的低周疲劳变形与断裂行为,对T6态热挤压合金进行了室温和200℃条件下的低周疲劳实验。结果表明:在室温和200℃下合金塑性应变幅与载荷反向周次之间服从Coff... 为了揭示经过T6处理的热挤压Al-5Cu-0.8Mg-0.15Zr-0.2Sc-0.5Ag合金在不同温度下的低周疲劳变形与断裂行为,对T6态热挤压合金进行了室温和200℃条件下的低周疲劳实验。结果表明:在室温和200℃下合金塑性应变幅与载荷反向周次之间服从Coffin-Manson公式,而弹性应变幅与载荷反向周次之间服从Basquin公式;合金在室温和200℃下低周疲劳变形时,在较低外加总应变幅下疲劳变形机制主要为平面滑移,而在较高外加总应变幅下疲劳变形机制主要为波状滑移;室温和200℃下合金的疲劳裂纹均萌生于疲劳试样表面并以穿晶方式扩展。 展开更多
关键词 AL-CU-MG-AG合金 t6处理 低周疲劳 循环硬化 循环稳定 疲劳寿命 变形机制 疲劳断裂
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Ag元素和时效时间对T6态Al-5Cu-0.8Mg-0.15Zr-0.2Sc合金拉伸性能的影响
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作者 王莹 陈立佳 +2 位作者 车欣 张浩宇 张思倩 《沈阳理工大学学报》 CAS 2024年第4期51-56,共6页
为了明确Ag元素的添加对Al-Cu-Mg系铝合金拉伸性能的影响,针对T6态(固溶+时效处理)的热挤压Al-5Cu-0.8Mg-0.15Zr-0.2Sc(-0.5Ag)合金进行了室温和高温拉伸实验。结果表明,添加0.5%Ag元素可显著提高T6态Al-5Cu-0.8Mg-0.15Zr-0.2Sc合金的... 为了明确Ag元素的添加对Al-Cu-Mg系铝合金拉伸性能的影响,针对T6态(固溶+时效处理)的热挤压Al-5Cu-0.8Mg-0.15Zr-0.2Sc(-0.5Ag)合金进行了室温和高温拉伸实验。结果表明,添加0.5%Ag元素可显著提高T6态Al-5Cu-0.8Mg-0.15Zr-0.2Sc合金的室温抗拉强度、屈服强度、峰时效态及该合金在150~300℃范围的抗拉强度和屈服强度,但会降低该合金的室温和高温塑性。断口形貌的扫描电子显微镜观察与分析结果表明,在室温及高温拉伸加载条件下,T6态Al-5Cu-0.8Mg-0.15Zr-0.2Sc(-0.5Ag)合金的拉伸断口上大部分存在韧窝和撕裂棱,表现出明显的韧性断裂特点。 展开更多
关键词 Al-Cu-Mg系合金 拉伸性能 t6处理 韧性断裂
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人类白细胞抗原-DR/CD4^(+)T淋巴细胞白细胞介素6联合降钙素原预测ICU重症急性胰腺炎继发感染效能及对抗菌药物合理使用的指导价值
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作者 高婧 周鹏 +2 位作者 谢晶 王晓英 丛铃娟 《河北医学》 CAS 2024年第5期838-844,共7页
目的:分析人类白细胞抗原-DR/CD4^(+)T淋巴细胞(HLA-DR/CD4^(+))、白细胞介素6(IL-6)及降钙素原(PCT)在ICU重症急性胰腺炎(SAP)继发感染患者中的诊断效能及对抗菌药物合理使用的指导价值。方法:2020年5月至2023年12月在我院ICU收治的SA... 目的:分析人类白细胞抗原-DR/CD4^(+)T淋巴细胞(HLA-DR/CD4^(+))、白细胞介素6(IL-6)及降钙素原(PCT)在ICU重症急性胰腺炎(SAP)继发感染患者中的诊断效能及对抗菌药物合理使用的指导价值。方法:2020年5月至2023年12月在我院ICU收治的SAP患者80例纳入研究。按照是否继发感染将患者分为感染组(n=43)及未感染组(n=37)。收集所有患者临床资料,包括一般资料、实验室指标、抗菌治疗情况。比较两组一般资料及实验室指标,采用Logistic回归分析重症SAP继发感染的独立危险因素,采用受试者工作特征曲线(ROC)分析血清HLA-DR/CD4^(+)、IL-6及PCT预测SAP继发感染的效能。结果:感染组APACHEⅡ评分大于未感染组(P<0.05)。两组性别、年龄、病因、并发症(高血压、2型糖尿病及高脂血症)情况比较无显著差异(P>0.05)。感染组脂肪酶、IL-6及PCT水平高于未感染组(P<0.05),HLA-DR/CD4^(+)水平低于未感染组(P<0.05)。脂肪酶高表达(OR=2.354,95%CI 1.491~3.716)、HLA-DR/CD4^(+)高表达(OR=3.508,95%CI 1.283~9.588)、IL-6高表达(OR=4.284,95%CI 1.469~12.493)及PCT高表达(OR=5.743,95%CI 1.530~21.563)均是SAP继发感染的独立危险因素(P<0.05)。血清HLA-DR/CD4^(+)、IL-6及PCT及三者联合诊断SAP继发感染的AUC值分别为0.809、0.778、0.819及0.959,具有一定预测价值。联合诊断的AUC值及诊断效能明显大于单独HLA-DR/CD4^(+)(z=3.161,P=0.002)、IL-6(z=3.822,P<0.001)及PCT(z=3.346,P=0.001)诊断。局部感染组血清HLA-DR/CD4^(+)水平高于严重感染组,IL-6及PCT水平均低于严重感染组(P<0.05)。局部感染组抗菌药物使用时间、ICU住院时间及总住院时间均较严重感染组显著缩短(P<0.05)。结论:HLA-DR/CD4^(+)高表达、IL-6高表达及PCT高表达均是SAP继发感染的独立危险因素,可有效预测SAP继发感染。 展开更多
关键词 急性胰腺炎 人类白细胞抗原-DR/CD4^(+)t淋巴细胞 白细胞介素6 降钙素原 感染 抗菌药物
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T6态ZL105-(Pr+Ce)合金的组织及力学性能研究
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作者 曾敏 陈晖 《热加工工艺》 北大核心 2024年第10期143-147,共5页
采用光学显微镜、扫描电子显微镜、EDS分析仪、布氏硬度与拉伸试验研究了混合稀土与T6热处理对ZL105合金的微观组织及力学性能的影响。结果表明,当添加0.5wt%的稀土(Pr+Ce)后,ZL105合金的α-Al相、共晶Si相及富Fe相均被细化。ZL105-0.5w... 采用光学显微镜、扫描电子显微镜、EDS分析仪、布氏硬度与拉伸试验研究了混合稀土与T6热处理对ZL105合金的微观组织及力学性能的影响。结果表明,当添加0.5wt%的稀土(Pr+Ce)后,ZL105合金的α-Al相、共晶Si相及富Fe相均被细化。ZL105-0.5wt%(Pr+Ce)合金经T6热处理后,α-Al相进一步细化,晶粒趋于圆整,共晶Si相也进一步细化,由长条状转变为短颗粒状,但是富Fe相的形貌和尺寸没有发生明显变化。T6态ZL105-0.5wt%(Pr+Ce)合金的抗拉强度、伸长率及硬度分别为257.7 MPa、7.0%、98 HB。T6态ZL105-0.5wt%(Pr+Ce)合金的断口为典型的塑性断裂特征,断口表面出现了许多韧窝,主要以小韧窝为主,分布较均匀且密集。T6热处理后合金的力学性能得到了显著改善。 展开更多
关键词 ZL105-(Pr+Ce)铝合金 t6热处理 微观组织 力学性能
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T细胞亚群及血清IL-6、IL-17水平对类风湿关节炎预后的评价
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作者 叶敏 《医师在线》 2024年第7期16-19,共4页
目的分析T细胞亚群及血清白细胞介素(IL)-6、IL-17水平对类风湿关节炎(RA)预后的影响。方法选取2021年9月~2023年9月收治的102例RA患者为研究对象,均接受甲氨蝶呤片治疗3个月,于治疗前、治疗后采集患者空腹血液标本,使用流式细胞仪测定... 目的分析T细胞亚群及血清白细胞介素(IL)-6、IL-17水平对类风湿关节炎(RA)预后的影响。方法选取2021年9月~2023年9月收治的102例RA患者为研究对象,均接受甲氨蝶呤片治疗3个月,于治疗前、治疗后采集患者空腹血液标本,使用流式细胞仪测定T细胞亚群(CD4^(+)、CD8^(+))水平,使用酶联免疫吸附法(ELISA)测定血清IL-6、IL-17水平。统计所有患者临床预后情况,比较不同预后患者T细胞亚群及血清IL-6、IL-17水平。结果RA患者重度活动组的CD4^(+)/CD8^(+)、血清IL-6、IL-17水平均高于中度及轻度活动组(P<0.05)。RA患者治疗后CD4^(+)、血清IL-6、IL-17水平较治疗前降低,CD8^(+)较治疗前升高(P<0.05)。102例RA患者中,72例预后良好,占比70.59%,30例为预后不良,占比29.41%。预后不良的RA患者治疗后CD4^(+)、血清IL-6、IL-17水平较预后良好者高,CD8^(+)较预后良好者低(P<0.05)。结论CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)、血清IL-6、IL-17水平与RA患者预后情况显著相关。 展开更多
关键词 t细胞亚群 IL-6 IL-17 类风湿关节炎
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SAA、IL-6、CRP及T淋巴细胞亚群联合检测在类风湿性关节炎患者中的应用价值 被引量:1
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作者 何继浩 邹光美 +3 位作者 吴博文 陈武 杨小兰 梁梅 《中国医药科学》 2024年第13期173-176,198,共5页
目的探讨血清淀粉样蛋白A(SAA)、白细胞介素-6(IL-6)、C反应蛋白(CRP)及T淋巴细胞亚群联合检测在类风湿性关节炎患者中的应用价值并进行相关危险因素分析。方法选取2020年10月至2023年5月在玉林市第一人民医院确诊为类风湿性关节炎的患... 目的探讨血清淀粉样蛋白A(SAA)、白细胞介素-6(IL-6)、C反应蛋白(CRP)及T淋巴细胞亚群联合检测在类风湿性关节炎患者中的应用价值并进行相关危险因素分析。方法选取2020年10月至2023年5月在玉林市第一人民医院确诊为类风湿性关节炎的患者66例为类风湿关节炎组,同期选择体检健康者33名为对照组,比较两组SAA、IL-6、CRP及T淋巴细胞亚群水平的差异。结果类风湿性关节炎组SAA、IL-6、CRP、CD3^(+)T%及CD4^(+)T%水平高于对照组,CD8^(+)T%水平低于对照组,差异有统计学意义(P<0.05)。Spearman相关分析结果显示,IL-6与SAA、CRP、CD3^(+)T%及CD4^(+)T%呈正相关(P<0.05);CD4^(+)T%与SAA、IL-6、CRP、CD3^(+)T%呈正相关(P<0.05);IL-6、CD4^(+)T%分别与CD8^(+)T%呈负相关(P<0.05)。二元logistic回归分析显示,SAA、IL-6、CRP、CD3^(+)T%及CD4^(+)T%是类风湿性关节炎患者的危险因素,而CD8^(+)T%是该类患者保护因素(P<0.05)。结论类风湿性关节炎患者SAA、IL-6、CRP是类风湿性关节炎患者的危险因素,T淋巴细胞亚群免疫异常与该疾病发生发展密切相关,多项目联合检测对类风湿性关节炎临床诊疗及评估病情有重要价值。 展开更多
关键词 类风湿性关节炎 血清淀粉样蛋白A 白细胞介素-6 C反应蛋白 t淋巴细胞亚群
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