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A Discussion on Innovative Methods for Green Engineering Management in Construction Engineering
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作者 Jing Gu 《Journal of Architectural Research and Development》 2024年第6期92-97,共6页
With the rapid development of society,the construction industry has made significant progress.However,as environmental issues intensify,many construction projects contribute to pollution.In this context,applying green... With the rapid development of society,the construction industry has made significant progress.However,as environmental issues intensify,many construction projects contribute to pollution.In this context,applying green project management methods in construction can enhance energy conservation and environmental protection,reduce energy consumption and costs,and minimize environmental damage,promoting balanced development between the environment and the economy.Therefore,integrating green construction concepts into current construction projects is essential.Based on project requirements and construction activities,effective green project management strategies should be developed to improve management standards and promote more efficient green construction.This paper analyzes green project management in construction engineering and offers recommendations for reference. 展开更多
关键词 Construction engineering Green engineering management management methods
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Construction Method for Performance Management Curriculum Content System Based on Knowledge Graph
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作者 Miaomiao Ma Xia Mu 《教育研究前沿(中英文版)》 2024年第3期8-12,共5页
Performance Management is the core course of human resource management major,but its knowledge points lack multi-dimensional correlations.There are problems such as scattered content and unclear system,and it is urgen... Performance Management is the core course of human resource management major,but its knowledge points lack multi-dimensional correlations.There are problems such as scattered content and unclear system,and it is urgent to reconstruct the content system of the course.Knowledge graph technology can integrate massive and scattered information into an organic structure through semantic correlation and reasoning.The application of knowledge graph to education and teaching can promote scientific and personalized teaching evaluation and better realize individualized teaching.This paper systematically combs the knowledge points of Performance Management course and forms a comprehensive knowledge graph.The knowledge point is associated with specific questions to form the problem map of the course,and then the knowledge point is further associated with the ability target to form the ability map of the course.Then,the knowledge point is associated with teaching materials,question bank and expansion resources to form a systematic teaching database,thereby giving the method of building the content system of Performance Management course based on the knowledge map.This research can be further extended to other core management courses to realize the deep integration of knowledge graph and teaching. 展开更多
关键词 Knowledge Graph Construction method Curriculum Content System Performance management Course
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Design and analysis of an advanced thermal management system for the solar close observations and proximity experiments spacecraft 被引量:1
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作者 Liu Liu Kangli Bao +4 位作者 Jianchao Feng Xiaofei Zhu Haoyu Wang Xiaofeng Zhang Jun Lin 《Astronomical Techniques and Instruments》 CSCD 2024年第1期52-61,共10页
In this paper,the mission and the thermal environment of the Solar Close Observations and Proximity Experiments(SCOPE)spacecraft are analyzed,and an advanced thermal management system(ATMS)is designed for it.The relat... In this paper,the mission and the thermal environment of the Solar Close Observations and Proximity Experiments(SCOPE)spacecraft are analyzed,and an advanced thermal management system(ATMS)is designed for it.The relationship and functions of the integrated database,the intelligent thermal control system and the efficient liquid cooling system in the ATMS are elaborated upon.For the complex thermal field regulation system and extreme space thermal environment,a modular simulation and thermal field planning method are proposed,and the feasibility of the planning algorithm is verified by numerical simulation.A solar array liquid cooling system is developed,and the system simulation results indicate that the temperatures of the solar arrays meet the requirements as the spacecraft flies by perihelion and aphelion.The advanced thermal management study supports the development of the SCOPE program and provides a reference for the thermal management in other deep-space exploration programs. 展开更多
关键词 Solar Close Observations and Proximity Experiments Adaptive thermal control method Thermal field planning method Pumped liquid cooling system Advanced thermal management system
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Adaptive battery thermal management systems in unsteady thermal application contexts
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作者 Kailong Liu Qiao Peng +3 位作者 Zhuoran Liu Wei Li Naxin Cui Chenghui Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第10期650-668,I0014,共20页
With the increasing attention paid to battery technology,the microscopic reaction mechanism and macroscopic heat transfer process of lithium-ion batteries have been further studied and understood from both academic an... With the increasing attention paid to battery technology,the microscopic reaction mechanism and macroscopic heat transfer process of lithium-ion batteries have been further studied and understood from both academic and industrial perspectives.Temperature,as one of the key parameters in the physical fra mework of batteries,affects the performa nce of the multi-physical fields within the battery,a nd its effective control is crucial.Since the heat generation in the battery is determined by the real-time operating conditions,the battery temperature is essentially controlled by the real-time heat dissipation conditions provided by the battery thermal management system.Conventional battery thermal management systems have basic temperature control capabilities for most conventional application scenarios.However,with the current development of la rge-scale,integrated,and intelligent battery technology,the adva ncement of battery thermal management technology will pay more attention to the effective control of battery temperature under sophisticated situations,such as high power and widely varied operating conditions.In this context,this paper presents the latest advances and representative research related to battery thermal management system.Firstly,starting from battery thermal profile,the mechanism of battery heat generation is discussed in detail.Secondly,the static characteristics of the traditional battery thermal management system are summarized.Then,considering the dynamic requirements of battery heat dissipation under complex operating conditions,the concept of adaptive battery thermal management system is proposed based on specific research cases.Finally,the main challenges for battery thermal management system in practice are identified,and potential future developments to overcome these challenges are presented and discussed. 展开更多
关键词 Lithium-ion batteries Heat generation mechanism Battery thermal management system Cooling methods Battery safety
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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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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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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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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
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作者 崔爽 王羽晨 张春燕 《中国护理管理》 CSCD 北大核心 2024年第3期457-460,共4页
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... 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。 展开更多
关键词 4R危机管理理论 结缔组织病 肺动脉高压 6分钟步行试验 管理流程
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镓硼共掺对6英寸VGF法锗单晶电阻率均匀性的影响
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作者 张颖武 边义午 +3 位作者 陈晨 周春锋 王云彪 兰天平 《半导体技术》 CAS 北大核心 2024年第8期708-712,725,共6页
由于杂质分凝效应,镓掺杂垂直梯度凝固(VGF)法锗单晶的电阻率分布不均匀,理论上利用镓和硼分凝系数的差异,镓硼共掺工艺可以提升锗单晶电阻率均匀性。采用镓硼共掺工艺制备了6英寸(1英寸≈2.54 cm)VGF法锗单晶,对比分析了掺杂工艺对锗... 由于杂质分凝效应,镓掺杂垂直梯度凝固(VGF)法锗单晶的电阻率分布不均匀,理论上利用镓和硼分凝系数的差异,镓硼共掺工艺可以提升锗单晶电阻率均匀性。采用镓硼共掺工艺制备了6英寸(1英寸≈2.54 cm)VGF法锗单晶,对比分析了掺杂工艺对锗单晶电阻率均匀性的影响。当镓和硼杂质浓度分别为5.13×10^(18)cm^(-3)和0.67×10^(18)cm^(-3)时,在等径0~40 mm范围内轴向电阻率不均匀性为4.92%,等径0 mm和40 mm处径向电阻率不均匀性分别为1.63%和0.45%,与镓杂质浓度为5.13×10^(18)cm^(-3)的镓掺杂工艺相比,锗单晶头部的电阻率均匀性明显提升。当硼杂质浓度提高到1.89×10^(18)cm^(-3)时,镓硼共掺锗单晶头部电阻率均匀性变差。结果表明,适量硼掺杂的镓硼共掺工艺可以提升锗单晶头部电阻率均匀性。 展开更多
关键词 6英寸 垂直梯度凝固(VGF)法 锗单晶 镓硼共掺 电阻率 均匀性
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水热反应温度对ZnIn_(2)S_(4)/Bi_(2)WO_(6)复合催化剂的影响研究
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作者 王震 刘婷婷 +1 位作者 张强 王磊 《功能材料》 CAS CSCD 北大核心 2024年第7期7191-7199,共9页
为解决传统半导体光催化剂可见光响应能力弱、光生电子空穴复合快、能带结构导致载流子氧化还原能力弱等问题,采用水热法制备ZnIn_(2)S_(4)/Bi_(2)WO_(6)(ZlS@BW)复合催化剂并系统研究水热反应温度对其结构性能的影响。当水热温度从80... 为解决传统半导体光催化剂可见光响应能力弱、光生电子空穴复合快、能带结构导致载流子氧化还原能力弱等问题,采用水热法制备ZnIn_(2)S_(4)/Bi_(2)WO_(6)(ZlS@BW)复合催化剂并系统研究水热反应温度对其结构性能的影响。当水热温度从80℃升高到160℃,ZlS@BW复合光催化剂结晶度提高,形貌转变为致密核壳结构,比表面积和光电性能先降低再升高,氟伐他汀去除率逐步上升。而当温度升高到200℃时,核壳结构遭到了破坏,比表面积和光电性能变差,氟伐他汀的降解效果降低,光催化性能下降。结果表明,水热温度为160℃时,制备的ZlS@BW复合光催化剂晶型结晶程度较高,且形貌致密,比表面积最大,产生的瞬态光电流最大,阻抗半径最小,具有最优光催化性能。对污染物氟伐他汀降的降解效率最高,可达到75.47%。 展开更多
关键词 水热法 水热反应温度 ZnIn_(2)S_(4)/Bi_(2)WO_(6)复合催化剂 光催化
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PDCA循环结合6S管理法应用于急救医疗设备管理作用探讨 被引量:2
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作者 王雨荷 周鑫 +5 位作者 余晶 刘成友 宋宁宁 田书畅 张华伟 秦航 《生物医学工程与临床》 CAS 2024年第1期121-128,共8页
目的探讨利用PDCA(计划、实施、检查和行动)循环和6S(整理、整顿、清扫、清洁、素养、安全)管理法降低医院急诊抢救室医疗设备的故障率与故障频次,优化急救医疗设备管理流程。方法临床工程处联合急诊抢救室成立管理小组,进行现状把握,... 目的探讨利用PDCA(计划、实施、检查和行动)循环和6S(整理、整顿、清扫、清洁、素养、安全)管理法降低医院急诊抢救室医疗设备的故障率与故障频次,优化急救医疗设备管理流程。方法临床工程处联合急诊抢救室成立管理小组,进行现状把握,统计急诊抢救室从2022年1月至6月的医疗设备的故障待机时间、使用时间与故障频次。组织全员进行头脑风暴,利用鱼骨图、柏拉图等工具,探究故障原因并制定实施对策。统计对策实施后2022年7月至12月的数据,比较故障率和故障频次变化,评价对策实施的效果。结果开发了设备管理软件MEIS,实现医疗设备的自助查询、报修、追溯功能。改善后的医疗设备使用时间为96946 h,故障待机时间为369 h。目标达标率为112.5%,进步率为62.38%。对策实施后较实施前急救医疗设备故障率(1.01%vs 0.38%)和故障频次(121次vs 51次)明显降低,差异具有统计学意义(P<0.05)。结论利用PDCA循环和6S管理法降低了急救医疗设备的故障率和故障频次,规范了急救医疗设备的维护保养、操作使用、故障管理、计量管理流程。有助于提高相关工作人员的职业素养能力和医院医疗服务质量,并为建立规范化的医疗设备管理模式提供了借鉴的思路。 展开更多
关键词 PDCA循环 6S管理 急救设备 设备管理
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双标多测法在枣仁安神颗粒6个成分含量测定中的应用
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作者 陈颖 刘智勇 郑时桢 《海峡药学》 2024年第8期56-61,共6页
目的建立枣仁安神颗粒中斯皮诺素、6'''-阿魏酰斯皮诺素、迷迭香酸、五味子醇甲、五味子乙素和丹酚酸B 6个成分的双标多测法,验证该方法在枣仁安神颗粒质量评价中应用的准确性和可行性。方法采用HPLC法,以乙腈为流动相A,0.2... 目的建立枣仁安神颗粒中斯皮诺素、6'''-阿魏酰斯皮诺素、迷迭香酸、五味子醇甲、五味子乙素和丹酚酸B 6个成分的双标多测法,验证该方法在枣仁安神颗粒质量评价中应用的准确性和可行性。方法采用HPLC法,以乙腈为流动相A,0.2%冰醋酸溶液为流动相B,梯度洗脱,流速为1.0 mL·min^(-1),切换波长320 nm(斯皮诺素、6'''-阿魏酰斯皮诺素、迷迭香酸、丹酚酸B)、250 nm(五味子醇甲、五味子乙素),柱温28℃。采用5根不同的C_(18)色谱柱,测定枣仁安神颗粒6个成分的实际保留时间,计算各成分在各色谱柱保留时间的平均值,得到各成分的标准保留时间,选取斯皮诺素(峰1)、五味子乙素(峰6)作为双标化合物,使用双标线性校正法准确定位各成分色谱峰,预测成分在未知色谱柱的保留时间并进行方法学验证。以五味子乙素为参照物,计算其余各成分的相对校正因子,对各成分进行定量。结果双标线性校正法能够准确地预测待测组分在未知色谱柱上的保留时间;斯皮诺素、6'''-阿魏酰斯皮诺素、迷迭香酸、五味子醇甲和丹酚酸B相对于五味子乙素的相对校正因子分别为0.7342、0.6063、0.5664、0.9975及0.7773,其RSD均小于1%;各成分含量计算值和实测值无显著差异。结论双标多测法同时测定枣仁安神颗粒中6个成分可行且准确。 展开更多
关键词 枣仁安神颗粒 双标多测法 相对校正因子定量 斯皮诺素 五味子乙素 6-阿魏酰斯皮诺素 丹酚酸B 五味子醇甲 迷迭香酸
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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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Analysis and management strategies for the low voltage problems of rural power grid based on the distribution network flow calculation method 被引量:2
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作者 陈曦 何俊宏 HE Yu-cheng 《Journal of Chongqing University》 CAS 2015年第4期134-140,共7页
For a long time, because of the lack of investment capital and enough attentions, the overall constructions of rural power grid were far behind than the urban power grid in Chongqing Jiangbei Power Company. The low vo... For a long time, because of the lack of investment capital and enough attentions, the overall constructions of rural power grid were far behind than the urban power grid in Chongqing Jiangbei Power Company. The low voltage problems were highlighted in the rural power grid due to the characteristics of rural power grid. Using the distribution network flow calculation method, we evaluated the low voltage problems of the rural power grid which belongs to Chongqing Jiangbei Power Company. In addition, we collected the data of distribution transformers in electricity consumption peak period. Some practical management strategies were proposed by the analysis and evaluation of potential and appeared low voltage problems. 展开更多
关键词 RURAL power GRID flow CALCULATION method low VOLTAGE PROBLEM management strategy
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Bi_(2)WO_(6)/g-C_(3)N_(4)复合光催化剂的制备及其光催化性能研究 被引量:1
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作者 韩碧波 刘世凯 +3 位作者 宋志健 王嘉琳 吴昊承 闫国晋 《现代化工》 CAS CSCD 北大核心 2024年第4期175-179,共5页
以尿素、硝酸铋、钨酸钠等为主要原料,在热缩聚法制备g-C_(3)N_(4)的基础上,通过水热法制备Bi_(2)WO_(6)/g-C_(3)N_(4)复合光催化剂。在模拟太阳光照射下,研究Bi_(2)WO_(6)/g-C_(3)N_(4)复合光催化剂对甲基橙的光催化降解性能。结果表明... 以尿素、硝酸铋、钨酸钠等为主要原料,在热缩聚法制备g-C_(3)N_(4)的基础上,通过水热法制备Bi_(2)WO_(6)/g-C_(3)N_(4)复合光催化剂。在模拟太阳光照射下,研究Bi_(2)WO_(6)/g-C_(3)N_(4)复合光催化剂对甲基橙的光催化降解性能。结果表明,复合光催化剂相比于单体光催化剂的性能有显著提高。在Bi_(2)WO_(6)与g-C_(3)N_(4)质量比为2∶1、水热温度为180℃、水热时间为12 h条件下,复合光催化剂的性能最好。光照时间210 min时,甲基橙降解率达到了98.15%,相比于单体Bi_(2)WO_(6)和g-C_(3)N_(4)光催化剂的效率分别提高了25.1%和37.7%,且光催化降解过程符合一级动力学方程。复合光催化剂具有优异的稳定性,经过4次重复性实验,甲基橙降解率仍达到95.17%。 展开更多
关键词 g-C_(3)N_(4) Bi_(2)WO_(6) 水热法 光催化 甲基橙
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Pain Management in Pediatric Nursing
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作者 Senay Cetinkaya 《Open Journal of Pediatrics》 CAS 2023年第3期379-393,共15页
Children often experience pain in different stage of life. After birth, newborns are exposed to many painful attempts and their anxiety levels increase with it. These painful attempts lead to metabolic or physiologica... Children often experience pain in different stage of life. After birth, newborns are exposed to many painful attempts and their anxiety levels increase with it. These painful attempts lead to metabolic or physiological problems in newborns. Excessive protein expenditure when exposed to pain for a long time, electrolyte inhalation, weakening of the immune system. Even repetitive painful procedures increase mortality and morbidity. Children experience pain due to acute onset diseases such as otitis media or pharyngitis and also in different medical interventions such vaccination, blood transfusion, vascular access, dressing change, lumber punching, or sickle cell anemia. Appropriate assessment scales should be used to treat pain effectively and adequately. Pharmacological treatment as well as non-pharmacological treatment methods has been found to be effective in the treatment of pain. Non-pharmacological methods allow your body to release natural endorphins and help to lift the pain to a minimum level or completely. In this study, current approaches and studies about pain in children will be presented. Non-pharmacological methods will be examined in more detail. Every child has right to live a painless life. It is one of the main purposes of nursing care to relieve children’s pain and improve their life quality. 展开更多
关键词 CHILD NURSING Non-Pharmacological methods. Pain Pain Score Pain management
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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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用于C_(3)H_(6)/N_(2)分离的PDA@PEBA2533膜的制备
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作者 杜翠花 张茜 +2 位作者 王晓东 黄伟 周明 《化工进展》 EI CAS CSCD 北大核心 2024年第1期437-446,共10页
为回收聚丙烯制备尾气中的丙烯,采用本实验室独创的浸渍-旋转法在聚醚嵌段共聚酰胺(PEBA2533)膜表面沉积聚多巴胺(PDA)膜层制备出对C3H6具有更强亲和性的PDA@PEBA2533膜。利用扫描电子显微镜(SEM)和X射线衍射(XRD)对PDA颗粒和膜进行表... 为回收聚丙烯制备尾气中的丙烯,采用本实验室独创的浸渍-旋转法在聚醚嵌段共聚酰胺(PEBA2533)膜表面沉积聚多巴胺(PDA)膜层制备出对C3H6具有更强亲和性的PDA@PEBA2533膜。利用扫描电子显微镜(SEM)和X射线衍射(XRD)对PDA颗粒和膜进行表征。考察了PDA沉积时间对膜形貌、结构以及分离性能的影响,也考察了温度和压力等操作条件对膜分离性能的影响。探索了PDA@PEBA2533膜对不同C3H6浓度的C_(3)H_(6)/N_(2)混合气的分离效果以及膜的长时间分离稳定性。结果表明,沉积PDA于PEBA2533膜表面有效提高了膜的分离性能。当沉积时间不小于24h时,可得到连续的PDA膜层,随沉积时间的增加,膜层逐渐增厚,气体渗透速率先增大后减小,选择性持续上升,沉积24h所制备的膜分离性能最佳。增大操作温度和压力,膜对C3H6和N2的渗透速率均增大,C_(3)H_(6)/N_(2)选择性则降低。增大混合气中C3H6浓度,膜对C3H6的渗透速率和选择性均呈现先上升后下降的趋势。在所制备的分离性能最好的PDA@PEBA2533膜上,0.2MPa时,对C3H6体积分数为20%的混合气,温度从0℃提高到50℃,C3H6渗透速率从8.25GPU增加到71.42GPU,C_(3)H_(6)/N_(2)选择性从22.92降低至10.14。在130h的气体分离实验中,该膜表现出良好的稳定性。该膜与其他分离C_(3)H_(6)/N_(2)混合气膜相比具有一定的优势。 展开更多
关键词 C_(3)H_(6)/N_(2)混合气 分离 浸渍-旋转法 聚多巴胺@聚醚嵌段共聚酰胺
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Application of TOPSIS Method in Support of Decisions Made in Staff Management Issues 被引量:2
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作者 Masuma Guseyn Mammadova Zarifa Gasim Jabrailova 《Computer Technology and Application》 2013年第6期307-316,共10页
Evaluation model was proposed which refers to fuzzy formalism of the personnel management issues taking account their specific characteristics. Application of TOPSIS (technique for order Performance by similarity to ... Evaluation model was proposed which refers to fuzzy formalism of the personnel management issues taking account their specific characteristics. Application of TOPSIS (technique for order Performance by similarity to ideal solution) method for evaluation and regulation of alternatives based on hierarchically structured criteria of qualitative character by multiple experts to intellectually support decisions made in staff management issues is reviewed in the article. Candidate selection experiment based on criteria system formed using TOPSIS method for evaluation of candidates during solution of hiring problems reviewed and obtained results were compared with results obtained using Matlab program package. 展开更多
关键词 Personnel management multi-criteria evaluation criteria coefficients decision making fuzzy number TOPSIS method.
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{P_(4)Mo_(6)}基多金属氧酸盐构筑的镍配合物作为一种电化学传感器用于检测Cr^(Ⅵ)和Fe^(Ⅲ)离子
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作者 刘晓慧 李慧 +1 位作者 徐娜 王秀丽 《东北师大学报(自然科学版)》 CAS 北大核心 2024年第2期100-105,共6页
以钼酸钠、硫酸镍和3-氨甲基吡啶为原料,通过水热法合成了一个{P_(4)Mo_(6)}基多金属氧酸盐构筑的镍配合物,其化学式为[H_(2)(3-AP)]_(6){Ni[Mo_(6)O_(12)(OH)_(3)(PO_(4))_(2)(HPO_(4))_(2)]_(2)}(化合物1),3-AP为3-氨甲基吡啶.该化合... 以钼酸钠、硫酸镍和3-氨甲基吡啶为原料,通过水热法合成了一个{P_(4)Mo_(6)}基多金属氧酸盐构筑的镍配合物,其化学式为[H_(2)(3-AP)]_(6){Ni[Mo_(6)O_(12)(OH)_(3)(PO_(4))_(2)(HPO_(4))_(2)]_(2)}(化合物1),3-AP为3-氨甲基吡啶.该化合物为三维超分子结构,其由{Ni[P_(4)Mo_(6)^(Ⅴ)O_(31)]_(2)}^(22-)记为{Ni(P_(4)Mo_(6))_(2)}和质子化的3-AP通过氢键相互作用连接而成.研究了该配合物修饰的碳糊电极(1-CPE)对Cr^(Ⅵ)和Fe^(Ⅲ)离子的电化学检测,检出限(LODs)分别为2.3和4.6μmol/L.同时1-CPE在各种金属离子的存在下对Cr^(Ⅵ)和Fe^(Ⅲ)表现出良好的选择性和较强的抗干扰能力. 展开更多
关键词 {P_(4)Mo_(6)}基多金属氧酸盐 水热合成法 电催化性能 重金属离子 晶体结构
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