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human condition monitoring in hazardous locations using pervasive RFID sensor tags and energy-efficient wireless networks

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第9期13卷 674-688页

作者： Javier G.ESCRIBANO Andrés GARCIA Autolog Group Industrial Engineering SchoolUniversity of Castilla-La ManchaAvda.Camilo José Cela s/n13071 Ciudad RealSpain

Tracking persons in dangerous situations as well as monitoring their physical condition, is often crucial for their safety. The systems commonly used for this purpose do not include individual monitoring or are too expensive and intrusive to be deployed in common situations. In this project, a mobile system based on energy-efficient wireless sensor networks (WSNs) and active radio frequency identification (RFID) has been developed to achieve ubiquitous positioning and monitoring of people in hazardous situations. The system designed can identify each individual, locate him/her, send data regarding their physical situation, and ascertain whether they are located in a confined space. A new algorithm called time division double beacon scheduling (TDDBS) has been implemented to increase operation time and data transmission rate of the nodes in the system. The results show that the use of this system allows us to find the location and state of a person, as well as to provide an analysis of the potential risks at each moment, in real time and in an energy-efficient way. In an emergency, the system also allows for quicker intervention, as it not only provides the location and causes of the event, but also informs about the physical condition of the individual at that moment.

关键词： Active RFID Wireless sensor networks (WSNs) ZigBee human monitoring Time division double beacon sched-uling (TDDBS)

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Close-loop recyclable and flexible halide perovskite@wool keratin sensor with piezoelectric property

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Journal of Energy Chemistry 2023年第9期84卷 428-435页

作者： Yingying Zhou Dangge Gao Bin Lyu Chi Zheng Litao Tang Shihao Guo Jianzhong Ma College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi'an 710021ShaanxiChina Xi'an Polytechnic University Xi'an 710048ShaanxiChina National Demonstration Center for Experimental Light Chemistry Engineering Education(Shaanxi University of Science&Technology) Xi'an 710021ShaanxiChina Xi'an Key Laboratory of Green Chemicals and Functional Materials Xi'an 710021ShaanxiChina

Halide perovskites with excellent piezoelectric properties,but their poor stability hinders their largescale ***,a sandwich-structured halide perovskite flexible sensor with good stability was developed according to a three-step procedure as follows:(ⅰ) in-situ growth of wool keratinCsPbBr_(3)(WK-CsPbBr_(3)) using wool keratin in interfacial passivation and coating,(ⅱ) electrospinning of a wool keratin-CsPbBr_(3)/polyacrylonitrile(WCP) nanofiber film,and(ⅲ) coating of the WCP nanofiber with polydimethylsiloxane(PDMS) to obtain a sensor(WCPP).The sensor could generate a piezoelectric voltage of 7.8 V at a pressure of 6 kPa in the stages of pressing and releasing,and the output characteristics did not decline even after 10,000 *** to the 4-month stability of the perovskite sensor,WCPP sensor exhibited the output performance even after 16 months,which indicated that wool keratin as a multidentate improved the stability of the halide ***,the sensor displayed a self-cleaning property and could also light up 14 commercial *** close-loop recycling of the lead halide perovskite was achieved by dissolving the WCP nanofiber film in DMF and then ***,the method proposed is a step forward for achieving the commercialization of WK-CsPbBr_(3) and providing new avenues for further utilization of wool waste.

关键词： Piezoelectric Halide perovskite Wool keratin Sensor human monitoring

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维普期刊数据库

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