Results 1 to 10 of about 2,086,138 (353)

Magnetic Field-Based Vehicle Positioning System in Long Tunnel Environment

open access: yesApplied Sciences, 2021
Recently, long tunnels are becoming more prevalent in Korea, and exits are added at certain sections of the tunnels. Thus, a navigation system should correctly guide the user toward the exit; however, adequate guidance is not delivered because the global
Beomju Shin   +4 more
doaj   +1 more source

Hyper-Redundant Manipulator Capable of Adjusting Its Non-Uniform Curvature with Discrete Stiffness Distribution

open access: yesApplied Sciences, 2022
Hyper-redundant manipulators are widely used in minimally invasive surgery because they can navigate through narrow passages in passive compliance with the human body. Although their stability and dexterity have been significantly improved over the years,
Seongil Kwon   +3 more
doaj   +1 more source

Design and Performance Analysis of BDS-3 Integrity Concept

open access: yesRemote Sensing, 2021
Compared to the BeiDou regional navigation satellite system (BDS-2), the BeiDou global navigation satellite system (BDS-3) carried out a brand new integrity concept design and construction work, which defines and achieves the integrity functions for ...
Cheng Liu   +8 more
doaj   +1 more source

Performance Improvement for Single-Photon LiDAR with Dead Time Selection

open access: yesInternational Journal of Aerospace Engineering, 2022
Compared with the impulse LiDAR, the single-photon LiDAR has higher measurement sensitivity in the prominent feature, especially for space-based long-distance imaging.
Lei Feng   +3 more
doaj   +1 more source

Multiplexing modulation design optimization and quality evaluation of BDS-3 PPP service signal

open access: yesSatellite Navigation, 2022
The Precise Point Positioning (PPP) service of BeiDou-3 Navigation Satellite System (BDS-3) is implemented on its Geostationary Earth Orbit (GEO) satellites.
Cheng Liu   +7 more
doaj   +1 more source

LoPATraN: Low Power Asset Tracking by Means of Narrow Band IoT (NB-IoT) Technology

open access: yesSensors, 2021
The narrowband Internet-of-Things (NB-IoT) communication standard is gaining momentum within the big picture of the Internet-of-Things (IoT) owing to its capabilities of ensuring pervasive and wide coverage while limiting power consumption. Therefore, it
Stefano Parrino   +2 more
doaj   +1 more source

Radiation environment and effect detection based on global navigation constellation

open access: yesOpen Astronomy, 2023
Combining the anomalies and environmental monitoring data of the early stage Beidou satellites, the space radiation environment spatial/temporal distribution and space radiation effect risk characteristics are analyzed, and the dynamic characteristics of
Quan Lin   +9 more
doaj   +1 more source

Fault Detection in PV Tracking Systems Using an Image Processing Algorithm Based on PCA

open access: yesEnergies, 2021
Photovoltaic power plants nowadays play an important role in the context of energy generation based on renewable sources. With the purpose of obtaining maximum efficiency, the PV modules of these power plants are installed in trackers.
Tito G. Amaral   +2 more
doaj   +1 more source

Floating photovoltaic technology definition aided with multi-criteria decision analysis: a case study

open access: yesInternational Journal of Sustainable Energy, 2022
The demand for electrical energy is constantly growing. Power generation from renewable sources will play a role in meeting the electricity demand. Floating photovoltaics is a solution that still needs to be explored in the design and construction phases.
Salvatore Di Grazia, Giuseppe Marco Tina
doaj   +1 more source

Facilitating trade and improving supply chain security through transit trade mobility: An empirical investigation from developing country

open access: yesCogent Social Sciences, 2023
This study tries to investigate supply chain security through transit trade mobility (TTM) at a domestic and global level, highlighting the importance of using technological development (i.e.
Moh’d Anwer AL-Shboul
doaj   +1 more source

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