Background:As a neglected cross-species parasitic disease transmitted between canines and livestock,echinococcosis remains a global public health concern with a heavy disease burden.In China,especially in the epidemic...Background:As a neglected cross-species parasitic disease transmitted between canines and livestock,echinococcosis remains a global public health concern with a heavy disease burden.In China,especially in the epidemic pastoral communities on the Qinghai-Tibet Plateau,the harsh climate,low socio-economic status,poor overall hygiene,and remote and insufficient access to all owned dogs exacerbate the difficulty in implementing the ambitious control programme for echinococcosis.We aimed to design and implement a remote management system(RMS)based on internet of things(loT)for control and surveillance of echinococcosis by combining deworming devices to realise long-distance smart deworming control,smooth statistical analysis and result display.New methods and tools are urgently needed to increase the deworming coverage and frequency,promote real-time scientific surveillance,and prevent transmission of echinococcosis in remoted transmission areas.展开更多
Based on the analysis of developing target, function and constitution of research projects system for remote management, the virtual account system is established on 3 layers of B/S mode. The development process of vi...Based on the analysis of developing target, function and constitution of research projects system for remote management, the virtual account system is established on 3 layers of B/S mode. The development process of virtual account system is realized by JSP/Servlets development language and MySQL database under windows server 2003 platform. At the same time, network security module of the system has been realized to reduce the influence caused by network security incidents. The system is capable of updating the information of vertical and horizontal projects dynamically and assigning virtual funds on WWW. Also, it realizes the query, statistical analysis function and so on. Practical results show that the system is a successful system for analyzing the various projects index of different departments.展开更多
Hybrid distribution transformers(HDTs)have better performance than traditional distribution transformers in improving power quality through reducing harmonics,unbalance,voltage fluctuations and low power factors in fu...Hybrid distribution transformers(HDTs)have better performance than traditional distribution transformers in improving power quality through reducing harmonics,unbalance,voltage fluctuations and low power factors in future smart power distribution systems.In order to increase the service life and reliability of hybrid distribution transformers,this paper proposes a remote management system using LoRa technology based on fuzzy logic.HDT based on a fuzzy logic judgment system(FLJS)replaces the Boolean logic with fuzzy logic and several power quality problems including power factors,load-side current harmonics and voltage unbalance are considered,as well as grid-side voltage deviation and unbalance.This management system can dynamically adjust the working states of HDT according to the output results of the FLJS to reduce the use time of power electronic devices.Due to the application of LoRa,this management system can remotely adjust the parameters of the FLJS in real time for different distribution network nodes to avoid frequent switching of HDT working states.In addition,it is able to remotely monitor the real-time working states and fault states of HDT to reduce recovery time and maintenance costs in case of HDT failure.Finally,simulation and experimental results are presented to verify the effectiveness of the proposed management system for HDT.展开更多
Atmospheric ducting has a significant impact on electromagnetic wave propagation.Radio signals that are trapped and guided by the atmospheric duct can travel a much longer distance over the horizon with lower attenuat...Atmospheric ducting has a significant impact on electromagnetic wave propagation.Radio signals that are trapped and guided by the atmospheric duct can travel a much longer distance over the horizon with lower attenuation since the signal power does not spread isotropically through the atmosphere.Atmospheric ducting brings both challenges and opportunities to wireless communications.On one hand,the signals propagating in the atmospheric duct may interfere with a receiver far away as remote co-channel interference.On the other hand,a point-to-point link can be established directly through the atmospheric duct to enable beyond line-of-sight communications.In this article,the formation of the atmospheric duct and its effects on radio wave propagation are first overviewed.Then solutions and standardization activities in the 3rd Generation Partnership Project(3GPP)to mitigate atmospheric duct induced remote interference are presented.Finally,the applications and design challenges of atmospheric duct enabled beyond line-of-sight communications are reviewed and future research directions are suggested.展开更多
文摘Background:As a neglected cross-species parasitic disease transmitted between canines and livestock,echinococcosis remains a global public health concern with a heavy disease burden.In China,especially in the epidemic pastoral communities on the Qinghai-Tibet Plateau,the harsh climate,low socio-economic status,poor overall hygiene,and remote and insufficient access to all owned dogs exacerbate the difficulty in implementing the ambitious control programme for echinococcosis.We aimed to design and implement a remote management system(RMS)based on internet of things(loT)for control and surveillance of echinococcosis by combining deworming devices to realise long-distance smart deworming control,smooth statistical analysis and result display.New methods and tools are urgently needed to increase the deworming coverage and frequency,promote real-time scientific surveillance,and prevent transmission of echinococcosis in remoted transmission areas.
基金This work is supported by Liaoning Province Doctoral Startup Grant 20031069 and China National "863"CI MS Foundation ( NO2003AA412030 9 ,2004AA412020 08)
文摘Based on the analysis of developing target, function and constitution of research projects system for remote management, the virtual account system is established on 3 layers of B/S mode. The development process of virtual account system is realized by JSP/Servlets development language and MySQL database under windows server 2003 platform. At the same time, network security module of the system has been realized to reduce the influence caused by network security incidents. The system is capable of updating the information of vertical and horizontal projects dynamically and assigning virtual funds on WWW. Also, it realizes the query, statistical analysis function and so on. Practical results show that the system is a successful system for analyzing the various projects index of different departments.
基金supported by the State Grid Science and Technology Project from State Grid Corporation of China(B626KY190004)the Key Research and Development Project of Shaanxi Province in 2018(No.2018ZDCXL-GY-07-05)。
文摘Hybrid distribution transformers(HDTs)have better performance than traditional distribution transformers in improving power quality through reducing harmonics,unbalance,voltage fluctuations and low power factors in future smart power distribution systems.In order to increase the service life and reliability of hybrid distribution transformers,this paper proposes a remote management system using LoRa technology based on fuzzy logic.HDT based on a fuzzy logic judgment system(FLJS)replaces the Boolean logic with fuzzy logic and several power quality problems including power factors,load-side current harmonics and voltage unbalance are considered,as well as grid-side voltage deviation and unbalance.This management system can dynamically adjust the working states of HDT according to the output results of the FLJS to reduce the use time of power electronic devices.Due to the application of LoRa,this management system can remotely adjust the parameters of the FLJS in real time for different distribution network nodes to avoid frequent switching of HDT working states.In addition,it is able to remotely monitor the real-time working states and fault states of HDT to reduce recovery time and maintenance costs in case of HDT failure.Finally,simulation and experimental results are presented to verify the effectiveness of the proposed management system for HDT.
基金This work was supported by the Industrial Internet Research Institute(Jinan)of Beijing University of Posts and Telecommunications under Grant 201915001
文摘Atmospheric ducting has a significant impact on electromagnetic wave propagation.Radio signals that are trapped and guided by the atmospheric duct can travel a much longer distance over the horizon with lower attenuation since the signal power does not spread isotropically through the atmosphere.Atmospheric ducting brings both challenges and opportunities to wireless communications.On one hand,the signals propagating in the atmospheric duct may interfere with a receiver far away as remote co-channel interference.On the other hand,a point-to-point link can be established directly through the atmospheric duct to enable beyond line-of-sight communications.In this article,the formation of the atmospheric duct and its effects on radio wave propagation are first overviewed.Then solutions and standardization activities in the 3rd Generation Partnership Project(3GPP)to mitigate atmospheric duct induced remote interference are presented.Finally,the applications and design challenges of atmospheric duct enabled beyond line-of-sight communications are reviewed and future research directions are suggested.
