Results 11 to 20 of about 240,781 (209)
Underground personnel positioning system based on ultra wideband technology
Gong-kuang zidonghua, 2014 In view of problems of short transmission distance, poor anti-multipath effect and low positioning accuracy existed in current underground personnel positioning technologies, an underground personnel positioning system was proposed by use of ultra ...
LIU Shulun, WANG Shuse
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Local and official forms of symbolic control: An Australian case study of the pedagogic work of para-educational personnel [PDF]
, 2000 In this paper an analysis is undertaken of the accounts of pedagogic work provided by para-educational personnel working in two government-funded schools situated in a low socio-economic area of an Australian city.
Singh, Parlo
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SOAR (Support Office for Aerogeophysical Research) Annual Report 1995/1996 [PDF]
, 1995 The Support Office for Aerogeophysical Research (SOAR) was a facility of the National Science Foundation's Office of Polar Programs whose mission is to make airborne geophysical observations available to the broad research community of geology ...
Bell, Robin E. +3 more
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Status and development trend of mine positioning technology
Gong-kuang zidonghua, 2018 Common mine positioning technologies were analyzed from aspects of positioning methods and wireless communication technologies, and application of the mine positioning technologies in personnel positioning system and equipment proximity detection were ...
HUO Zhenlong
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Research on improved PDR algorithm for underground personnel positioning
Gong-kuang zidonghua, 2021 As the traditional pedestrian dead reckoning (PDR) algorithm being used for underground personnel positioning, the positioning error gradually increases due to the cumulative error of the step frequency detection, step length estimation and heading ...
SUN Yanxin +3 more
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Research on wearable devices for safety of underground mine personnel
Gong-kuang zidonghua, 2018 In view of problems of low positioning accuracy of underground personnel positioning system and incomplete functions of underground personnel vital signs monitoring system, a wearable device with functions of personnel positioning, falling or lying ...
MA Yujing +4 more
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SOAR (Support Office for Aerogeophysical Research) Annual Report 1994/1995 [PDF]
, 1995 The Support Office for Aerogeophysical Research (SOAR) was a facility of the National Science Foundation's Office of Polar Programs whose mission is to make airborne geophysical observations available to the broad research community of geology ...
Bell, Robin E. +2 more
core +1 more source
Underground personnel and equipment location system based on iBeacon technology
Gong-kuang zidonghua, 2016 In order to solve the positioning problem of underground personnel and equipment, positioning principles and algorithms of iBeacon indoor positioning technology were deeply analyzed, and a design scheme of underground personnel and equipment location ...
ZHANG Hang, SUN Xiaoyu, TIAN Fengliang
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Gong-kuang zidonghua, 2018 Due to affects of clock synchronization error, clock timing error, multipath effect, not line of sight （NLOS）delay error, electromagnetic disturbance between positioning substation and positioning card, it has large positioning error in the existing ...
SUN Zhexing, WANG Yanwen
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Design and implementation of portable positioning instrument based on Bluetooth transmission
Meikuang Anquan, 2022 A portable positioning instrument for personnel positioning is designed. The positioning instrument has UWB precise positioning and RFID region positioning, which can ensure that the personnel positioning system can be used before and after upgrading ...
WANG Wei, CHEN Xian, JIN Yeyong
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