真空断路器断开空载变压器的过电压限制     

何伟 《江西电力职业技术学院学报》2002,15(2):11-14

对真空断路器断开空载变压器的过电压原理进行了阐述 ,对过电压的限制措施进行了分析 ,并详细分析了两种常用的保护装置。  相似文献   

卫星热管传热测试台的制冷与真空系统的设计   总被引：1，自引：0，他引：1  

雷新塘  徐烈  李兆慈 《实验室研究与探索》2003,22(2):102-104

介绍了能满足卫星环境要求的热管传热试验台的制冷与真空系统的设计方案，提出了一种采用液氮制冷和分子泵抽真空系统的方案。制冷系统能方便达到 60— -60℃的温度要求，并可以任意调节所需温度，且调温精度高、反映时间短。抽真空系统能满足0．1mPa的工作真空度和方便更换试样的要求，是一台简便、实用的卫星热管传热试验台。  相似文献   

病床呼叫及输液监控系统     

楼蔚松  廖任秀 《金华职业技术学院学报》2011,11(6):69-72

为了提高医院服务系统的智能化水平,设计了一种总线互联的病床呼叫及输液监控系统。系统由一个主站和多个从站组成．主站可以接收从站送出的呼叫信号,并存储20个呼叫的病床号,具有手动清除当前显示的病床号及声光报警信号的功能。在从站上能实时显示点滴速度,在输液结束3秒内发出声光报警信号,并提示主站进行处理。主站和从站问最远距离可以达到1000米以上,同时主站能巡回显示从站的编号和当前的点滴速度,显示间隔时间可以在3～10秒间任意设定。  相似文献   

地热电站凝汽器真空系统的技术经济性分析     

蔡正敏  章文英  刘俊  张立国 《中国科技纵横》2015,(1)

本文分析了真空系统对地热电站高效运行的重要意义,介绍了射汽抽气器及水环式真空泵两类真空系统的工作原理,并基于肯尼亚某地热井井口电站参数,对两级抽气器和两级水环式真空泵的当量能耗进行了技术经济性对比分析,给出了地热电站真空系统优选建议,为真空系统的优化提供了科学依据。  相似文献   

Understanding information diffusion with psychological field dynamic     

《Information processing & management》2022,59(4):102956

Several approaches focus on how to automatically capture the latent features from original diffusion data and predict the future scale of cascades utilizing a black box framework. However, they ignore the penetrating insight into the underlying mechanism that how each participant is involved in the cascade. In this work, we bridge the gap between prediction and understanding of information diffusion by incorporating deep learning techniques and social psychology. To characterize individual participation driven by both subjective and objective impetus and integrate it into the macro-level cascade, we propose an end-to-end model, named PFDID, which is designed based on the field dynamics theory of psychology, including the intrinsic cognition field and the extrinsic environment field. We represent these two field dynamics respectively with the pairwise semantic relation between the message itself and corresponding comment and the forwarder’s micro-community activity embedding to provide educated explanations for forwarding behaviour. Afterwards, the cross infusion mechanism is designed to calculate the mutual influence of inhomogeneous field dynamics inside users and cross influence of homogeneous field dynamics among individuals, whose output is fed into the diffusion network aggregation layer for the cascade size prediction. Extensive experiments on two typical social networks, Sina Weibo and Twitter, manifest that the proposed PFDID outperforms state-of-the-art approaches. Our model achieves excellent prediction results, with MSLE = 1.856 on Sina Weibo and MSLE = 1.962 on Twitter, providing 6.54% and 10.53% relative performance gains, respectively. Furthermore, the interpretability is also discussed based on detailed visualization. We observe that the psychological impetus behind social behaviour varies mainly following two patterns with the spread of information, including gradual change and joint influence. Additionally, the indirect dependencies have also been verified.  相似文献   

Innovative Experiential Learning Activities in Aging: The Experiences of Four BEL Projects     

Kristina M. Hash  Jay Poole  Melissa Floyd  Crystal Dea Moore  Anissa T. Rogers  Leslie E. Tower 《Journal of Teaching in Social Work》2017,37(2):156-170

The BSW Experiential Learning (BEL) Program aims to infuse intergenerational content into the curriculum and recruit students to the field of social work by implementing face-to-face learning opportunities with older adults. This article discusses and compares the experiences of 4 diverse BEL projects that implemented gero-experiential learning activities into 1 or more of the BSW curriculum areas: introduction/social work practice, social welfare policy, human behavior in the social environment, social work research, and field practicum. “Three keys to success” are offered as ways in which gero-experiential activities may be successfully implemented by other programs.  相似文献   

当前我国县域金融改革的主要措施   总被引：2，自引：0，他引：2  

丁文丽 《预测》2003,22(5):75-77

县域金融供给的长期不足与错位导致县域金融服务真空由来已久，而力度空前的四大国有银行市场战略退出则使本已巨大的金融真空更加巨大。基于本文的分析，笔者提出了县域金融改革的关键是依据县域金融服务需求，调整并创造新的金融制度供给，规范和完善现有县域金融、特别是农村金融服务体系。  相似文献   

常减压蒸馏装置单炼南帕斯凝析油技术分析     

黄郁春 《茂名学院学报》2014,(6):22-25

凝析油加工可以为下游装置提供充足的乙烯裂解原料,并有效降低乙烯的生产成本,拉动效益增长。南帕斯凝析油作为一种比较特殊的原油,具有密度小、轻收高,但硫化氢含量也高的特点,在实际生产中一直处于低比例的掺炼阶段,极大地限制了凝析油加工量。文章针对单炼南帕斯凝析油的加工流程、馏出口质量控制、产品收率、主要操作参数、能耗和动力费用、生产情况和操作等方面进行了技术分析。  相似文献   

一种新型户外运动节能炊事装备的设计     

许阳懿  周振中 《金华职业技术学院学报》2010,10(3):49-53

介绍了所设计的新型户外运动节能炊事装备的基本结构和主要性能。该装备集成野营锅、水壶、炉头及燃料罐于一体,解决了目前户外装备种类繁多、负重大、携带不便、能耗大等问题,应用了真空保温独特设计、丁烷燃烧加热系统,解决了户外装备能源利用率低和防风抗风性能差的问题,并应用了穹形螺纹加热技术解决了糊锅、粘锅及加热时间长等关键问题。  相似文献   

常减压装置减压塔机械抽真空改造设计     

赵银瑞 《茂名学院学报》2013,(4):72-74

介绍了喷射真空泵和液环真空泵的各自特点,结合工程设计实例,探讨了茂名5000kt／a常减压蒸馏装置减压塔机械抽真空改造的工艺方案,工艺管道及自控流程,联锁控制系统等。同时对设备选型和配管方面提出了注意事项,可供类似项目在设计时参考。项目实施后结果表明,采用液环真空泵组代替二级蒸汽喷射器的改造方案是成功的,装置综合能耗降低0．334kgEo／t,改造后操作方案灵活,投资、节能和环保效益明显。  相似文献