A new real-time underwater equipment location method adopting an electric field induced by a standard current source is proposed.Our goals were real-time tracking and location of stationary or moving underwater equipm...A new real-time underwater equipment location method adopting an electric field induced by a standard current source is proposed.Our goals were real-time tracking and location of stationary or moving underwater equipment both in shallow and deep seas,under noisy conditions.The main features of this method are as follows:(1)a standard current source on the water surface,which can be towed by a vehicle,consisting of two electrodes,a signal generator,and a GPS unit;(2)measurement of the extremely low frequency(ELF)electric field emitted by the current source,made possible by electric field sensors on the underwater equipment;(3)position of the underwater equipment is estimated in real time based on a progressive update extended Kalman filter(PUEKF),which is carried out using the propagation model of an ELF electric field because the electric field at the position of the underwater equipment and the current source position are known.We verified the accuracy of our method and confirmed real-time location feasibility through numerical,physical scale,and real-time sea experiments.Through numerical experiments,we verified that our method works for underwater equipment location in real-world conditions,and the location error can be less than 0.2 m.Next,real-time location experiments for stationary underwater measuring equipment in water tank were conducted.The result shows that the location error can be less than 0.1 m.We also confirmed real-time location feasibility through the use of offshore experiment.We expect that our method will complement conventional underwater acoustic location methods for underwater equipment in acoustically noisy environments.展开更多
实现航天测控系统装备保障、快速维修、高效维护的前提是能够充分掌握装备部件运行状态、使用寿命、故障率等信息以及相关备件信息,当装备出现问题时,能够依据以往运行情况、故障点位为问题排查提供参考,快速获取备件需求信息,并对备件...实现航天测控系统装备保障、快速维修、高效维护的前提是能够充分掌握装备部件运行状态、使用寿命、故障率等信息以及相关备件信息,当装备出现问题时,能够依据以往运行情况、故障点位为问题排查提供参考,快速获取备件需求信息,并对备件需求提供响应。在深入分析航天测控系统组成的基础上,将无线射频识别(Radio Frequency Identification,RFID)技术应用于航天测控系统装备管理中,对装备运行情况、备件储备情况等信息进行集中采集、管理和查询。通过基于RFID航天测控系统装备管理平台的建立,实现了装备精确、全面、系统的管理,为后续装备的分析维修提供了有效的保障手段,为试验任务的圆满执行奠定基础。展开更多
This article reviews the basic theories, methods, and clinical applications of eye diagnosis in traditional Chinese medicine(TCM). It introduces cutting-edge methods and applications and explains that the modernizatio...This article reviews the basic theories, methods, and clinical applications of eye diagnosis in traditional Chinese medicine(TCM). It introduces cutting-edge methods and applications and explains that the modernization of TCM eye diagnosis includes “equipment-assisted diagnosis” and “artificial intelligencebased diagnosis”. The article also notes that while there are many recent studies of the static attributes of eyes in modern TCM eye diagnosis, modern application research on the dynamic attributes of eyes in TCM diagnosis theory is relatively rare. We propose, therefore, that introducing advanced eye-movement detection technology into TCM clinical diagnosis could help to further modernize TCM eye diagnosis.展开更多
基金supported by the Youth Foundation of the National Natural Science Foundation of China(Grant No.51509252)。
文摘A new real-time underwater equipment location method adopting an electric field induced by a standard current source is proposed.Our goals were real-time tracking and location of stationary or moving underwater equipment both in shallow and deep seas,under noisy conditions.The main features of this method are as follows:(1)a standard current source on the water surface,which can be towed by a vehicle,consisting of two electrodes,a signal generator,and a GPS unit;(2)measurement of the extremely low frequency(ELF)electric field emitted by the current source,made possible by electric field sensors on the underwater equipment;(3)position of the underwater equipment is estimated in real time based on a progressive update extended Kalman filter(PUEKF),which is carried out using the propagation model of an ELF electric field because the electric field at the position of the underwater equipment and the current source position are known.We verified the accuracy of our method and confirmed real-time location feasibility through numerical,physical scale,and real-time sea experiments.Through numerical experiments,we verified that our method works for underwater equipment location in real-world conditions,and the location error can be less than 0.2 m.Next,real-time location experiments for stationary underwater measuring equipment in water tank were conducted.The result shows that the location error can be less than 0.1 m.We also confirmed real-time location feasibility through the use of offshore experiment.We expect that our method will complement conventional underwater acoustic location methods for underwater equipment in acoustically noisy environments.
文摘实现航天测控系统装备保障、快速维修、高效维护的前提是能够充分掌握装备部件运行状态、使用寿命、故障率等信息以及相关备件信息,当装备出现问题时,能够依据以往运行情况、故障点位为问题排查提供参考,快速获取备件需求信息,并对备件需求提供响应。在深入分析航天测控系统组成的基础上,将无线射频识别(Radio Frequency Identification,RFID)技术应用于航天测控系统装备管理中,对装备运行情况、备件储备情况等信息进行集中采集、管理和查询。通过基于RFID航天测控系统装备管理平台的建立,实现了装备精确、全面、系统的管理,为后续装备的分析维修提供了有效的保障手段,为试验任务的圆满执行奠定基础。
文摘This article reviews the basic theories, methods, and clinical applications of eye diagnosis in traditional Chinese medicine(TCM). It introduces cutting-edge methods and applications and explains that the modernization of TCM eye diagnosis includes “equipment-assisted diagnosis” and “artificial intelligencebased diagnosis”. The article also notes that while there are many recent studies of the static attributes of eyes in modern TCM eye diagnosis, modern application research on the dynamic attributes of eyes in TCM diagnosis theory is relatively rare. We propose, therefore, that introducing advanced eye-movement detection technology into TCM clinical diagnosis could help to further modernize TCM eye diagnosis.
