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基于某水电站PT一次保险熔断可监视化研究 被引量:1
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作者 张松浩 王命福 +1 位作者 冷佳 杨扬 《四川水力发电》 2023年第S01期107-110,共4页
在发电系统中,电压互感器(PT)是测量主变低压侧、发电机机端等一次设备电压的重要装置,因采用设备质量不佳、保险老化、使用时间过久等固有因素,保险慢熔、熔断事件时有发生,可能会直接或间接导致一次设备停运,影响电站安全稳定运行。... 在发电系统中,电压互感器(PT)是测量主变低压侧、发电机机端等一次设备电压的重要装置,因采用设备质量不佳、保险老化、使用时间过久等固有因素,保险慢熔、熔断事件时有发生,可能会直接或间接导致一次设备停运,影响电站安全稳定运行。通过分析研究,在原有接线基础上增加电阻监视内容,在控制系统增加逻辑上的判据,从而有效降低电站发生PT一次保险熔断造成事故事件发生的风险。 展开更多
关键词 发电系统 PT 保险熔断 可监视化
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Web-based spatiotemporal visualization of marine environment data 被引量:7
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作者 何亚文 苏奋振 +1 位作者 杜云艳 肖如林 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2010年第5期1086-1094,共9页
With long-term marine surveys and research,and especially with the development of new marine environment monitoring technologies,prodigious amounts of complex marine environmental data are generated,and continuously i... With long-term marine surveys and research,and especially with the development of new marine environment monitoring technologies,prodigious amounts of complex marine environmental data are generated,and continuously increase rapidly.Features of these data include massive volume,widespread distribution,multiple-sources,heterogeneous,multi-dimensional and dynamic in structure and time.The present study recommends an integrative visualization solution for these data,to enhance the visual display of data and data archives,and to develop a joint use of these data distributed among different organizations or communities.This study also analyses the web services technologies and defines the concept of the marine information gird,then focuses on the spatiotemporal visualization method and proposes a process-oriented spatiotemporal visualization method.We discuss how marine environmental data can be organized based on the spatiotemporal visualization method,and how organized data are represented for use with web services and stored in a reusable fashion.In addition,we provide an original visualization architecture that is integrative and based on the explored technologies.In the end,we propose a prototype system of marine environmental data of the South China Sea for visualizations of Argo floats,sea surface temperature fields,sea current fields,salinity,in-situ investigation data,and ocean stations.An integration visualization architecture is illustrated on the prototype system,which highlights the process-oriented temporal visualization method and demonstrates the benefit of the architecture and the methods described in this study. 展开更多
关键词 marine environmental data web services marine information grid spatio-temporal visualization process-oriented integration
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Independent dual-responsive Janus chromic fibers 被引量:3
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作者 Yanfang Wei Wei Zhang +3 位作者 Chengyi Hou Qinghong Zhang Yaogang Li Hongzhi Wang 《Science China Materials》 SCIE EI CAS CSCD 2021年第7期1770-1779,共10页
Daily exposure under solar ultraviolet(UV)and infrared(IR)is prone to cause skin cancer and photoaging.Real-time monitoring of the environmental UV index and IR radiation temperature during outdoor activities can enha... Daily exposure under solar ultraviolet(UV)and infrared(IR)is prone to cause skin cancer and photoaging.Real-time monitoring of the environmental UV index and IR radiation temperature during outdoor activities can enhance awareness and strengthen personal protection.It is a challenge to design flexible,wearable devices(with measurement capabilities)that can be integrated with apparels.Here,microfluidic spinning technology(MST)was used for the continuous and large-scale fabrication of eco-friendly coresheath Janus fibers with a well-defined axially symmetric Janus core.One side of the core was sensitive to UV light and the opposite was sensitive to IR radiation.Textiles woven with Janus fibers showed excellent independent reversible color responses to dual-wavelength stimulation.Such textiles switched among four colors under UV and IR irradiation,both individually and in combination.The color gradient of the textiles changed significantly with increasing UV intensity(UV index).After 60 cycles of UV/IR stimulation and 50 washes,the change rate of the comprehensive chromatic aberration(ΔE_(ab)^(*))of the textiles under different conditions was only 0.42%-4.71%.This was attributed to the unique structure of the fibers.The three-line striped textiles demonstrated the potential of the fibers to be used as wearable energy-free realtime visual monitors of the UV index and IR radiation temperature. 展开更多
关键词 microfluidic spinning UV index IR radiation temperature dual-wavelength response core-sheath Janus fibers
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