Results 41 to 50 of about 639,736 (293)

A Vessel Position Precision Analysis Based on a Two-Star Combined Approach

Journal of Marine Science and Engineering
Traditional celestial navigation mainly utilized the sextant to measure the attitude and the position contour method to calculate and resolve the vessel’s positioning problem, but these methods are not rigorous, having major deficiencies in the ...
Yulin Wu, Chao Zhuo, Tao He, Gangjun Liu, Qingqing Liu   +4 more
doaj   +1 more source

A BDS/LTE-R Enhanced Data Fusion Positioning Algorithm Based on Deep Learning

Journal of Applied Science and Engineering, 2022
Integrated positioning methods in the high-velocity train control system require auxiliary equipment leading to more construction and maintenance costs.
Miao Luo, Jianwu Dang, Zhanjun Hao, Zhenhai Zhang   +3 more
doaj   +1 more source

CADASTRAL DATABASE POSITIONAL ACCURACY IMPROVEMENT [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Abstract. Positional Accuracy Improvement (PAI) is the refining process of the geometry feature in a geospatial dataset to improve its actual position. This actual position relates to the absolute position in specific coordinate system and the relation to the neighborhood features.
N. M. Hashim, A. H. Omar, S. N. M. Ramli, K. M. Omar, N. Din   +4 more
openaire   +3 more sources

Deterministic nano-assembly of a coupled quantum emitter - photonic crystal cavity system [PDF]

, 2011
The interaction of a single quantum emitter with its environment is a central theme in quantum optics. When placed in highly confined optical fields, such as those created in optical cavities or plasmonic structures, the optical properties of the emitter
Bouwmeester, D., Hagemeier, J., Hanson, R., Heeres, E. C., Kim, H., Oosterkamp, T. H., Petroff, P. M., Pfaff, W., Thon, S. M., van der Sar, T.   +9 more
core   +4 more sources

The Positioning Technology for Underwater Wireless Optical Communication Systems

Guangtongxin yanjiu, 2023
In recent years, with the continuous promotion of the " Ocean Power" strategy, Underwater Wireless Optical Communication (UWOC) has played an important role in marine military, underwater environment monitoring, submarine oil exploration and marine ...
ZHANG Teng-xiao, QIU Yang
doaj  

Three-dimensional Space Positioning Algorithm Based on Planar Projection [PDF]

Jisuanji gongcheng, 2016
In the process of Wireless Sensor Network(WSN) node positioning,it is more important to improve the x-axis and y-axis positioning accuracy of an unknown node than z-axis positioning accuracy,so this paper proposes a positioning algorithm based on planar ...
FENG Xiaojie,PENG Yong,WU Xisheng
doaj   +1 more source

Robust positioning control of pneumatic servo system with pressure control loop [PDF]

, 1995
The goal of this paper is to attain a robust positioning control of a pneumatic driving system. A positioning control system positively focusing on the pressure control is investigated from the view that the pressure control is indispensable for ...
Noritsugu, Toshiro, Takaiwa, Masahiro
core   +1 more source

Ultrasonic Array-Based Multi-Source Fusion Indoor Positioning Technology

Sensors
Underground mining involves numerous risks, such as collapses, gas leaks, and explosions, posing significant threats to worker safety. In this work, we develop an indoor localization system that uses Bluetooth for coarse positioning and ultrasonic arrays
Cong Li, Chenning Zhang, Bing Chen, Shaojian Xu, Luping Xu, Bo Yan   +5 more
doaj   +1 more source

Multipath Reflections Analysis on Indoor Visible Light Positioning System

, 2015
Visible light communication (VLC) has become a promising research topic in recent years, and finds its wide applications in indoor environments. Particularly, for location based services (LBS), visible light also provides a practical solution for indoor ...
Gu, Wenjun, Kashani, Mohammadreza A., Kavehrad, Mohsen   +2 more
core   +1 more source

Vulnerability analysis of satellite-based synchronized smart grids monitoring systems [PDF]

, 2014
The large-scale deployment of wide-area monitoring systems could play a strategic role in supporting the evolution of traditional power systems toward smarter and self-healing grids. The correct operation of these synchronized monitoring systems requires
Ahmed faheem Zobaa, Alfredo Vaccaro, Behrendt K., Celano T., Dickerson B., Dion A., Giuseppina Formato, Hu Y., Iacoviello A., Larsson M., Lombardi M. A., Mack P., Madani V., Madani V., Orpen O., Phadke A. G., Schenato L., Terzija V., Ullo S., Yang Y.   +19 more
core   +1 more source