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- 저자 : Pingting He (검색결과 2 건)
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Pingting Liu,Zhiyu Huang,Shihong Duan,Zikang Wang,Jie He 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.6
Method of cathode protection is employed to slow down the corrosion of terrestrial pipe. This paper aims to develop a system to monitor the terrestrial pipe cathode protection equipment to wholly track the operation status of buried pipe timely. The monitoring system integrates technology of wireless sensor networks, GPRS network and Internet not only to collect the cathode potential data in time and realize remote data transmission but also to regulate the guard mode of cathode protection on demand. Optimization mechanisms are adopted to effectively lower the energy assumption and to ensure data transmission reliability, from architecture design, selection of power saving hardware components, implementation of reliable network traffic mechanism including hierarchical network topology with least-complexity cluster head shift strategy, TDMA protocol with auto-adaptive resending scheme, work-on-duty with radio-awaken mechanism and so on. Trial running of the system has published good results with 96% or higher success ratio of data transmission, low power saving and power balance. In all, this system can meet the requirements of timely detecting physical malfunction of terrestrial pipeline and controlling field monitoring system on demand.
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Yuan Zhao,JingXiu Li,Ling Wang,Yanan Hao,Lin Yang,Pingting He,JianJun Xue 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.10
Sulfated TiO2 nanoparticles were successfully immobilized on zeolite through improving hydrolysis-deposition method. Microstructure, crystallization, surface state and surface area of composite catalysts were characterized by SEM, XRD, FTIR spectra, XPS and BET and the photocatalytic activity was evaluated by degradation of methyl orange under UV irradiation. We optimized these factors (SO4 -2) ions, calcination temperature and loading amount of sulfated TiO2) on photocatalytic activity and crystallization of composite photocatalysts. The results indicated that the SO4 -2 ) ions are successfully immobilized on the surface of TiO2, and sulfated TiO2/zeolite show the highest photocatalytic activity for methyl orange at the [SO4 -2]/[Ti4+] molar rate of 1:1, calcination temperature of 600 ℃ for 2 h, and sulfated TiO2 loading amount of 40%, respectively.
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