Results 11 to 20 of about 387 (165)
Ginkgetin Alleviates Inflammation and Senescence by Targeting STING. [PDF]
Adv Sci (Weinh)An artificial intelligence algorithm is utilized to predict and confirm that STING serves as a critical target for Ginkgetin, an active ingredient of Ginkgo biloba extract, combined with pharmacological methods. In vivo experiments indicate that Ginkgetin effectively alleviates systemic inflammation in Trex1−/− mice and inhibits the aging phenotype and
Liu Y +16 more
europepmc +2 more sources
A High-Precision Cooperative Localization Method for UAVs Based on Multi-Condition Constraints [PDF]
SensorsGlobal Navigation Satellite Systems (GNSSs) often suffer from significant localization errors in signal-denied environments. Furthermore, the accuracy of multi-UAV cooperative localization is highly sensitive to the relative geometric configuration of ...
Haiqiao Liu +4 more
doaj +2 more sources
Multi-Objective Design of a Lunar GNSS
Navigation, 2022 The success of future lunar missions depends on quality positioning, navigation, and timing (PNT) information. Earthbound GNSS signals can be received at lunar distances but suffer from poor geometric dilution of precision (GDOP) and provide no coverage ...
Filipe Pereira +2 more
doaj +1 more source
Base Station Selection for Hybrid TDOA/RTT/DOA Positioning in Mixed LOS/NLOS Environment
Sensors, 2020 The fifth generation (5G) cellular communication system is designed to support Time Difference of Arrival (TDOA), Round-Trip Time (RTT), and Direction of Arrival (DOA) measurements for indoor positioning.
Zhongliang Deng +3 more
doaj +1 more source
Hybrid TOA/AOA Positioning Algorithm Based on GDOP Weighting [PDF]
Jisuanji gongcheng, 2017 Existing Time of Arrival/Angle of Arrival(TOA/AOA) positioning algorithms based on Wireless Sensor Network(WSN) have low accuracy under the condition that the position of Anchor Nodes(AN) has error.
KONG Fanzeng,ZHENG Nae,CHEN Guojun,YU Haitao
doaj +1 more source
Weighted Geometric Dilution of Precision Calculations with Matrix Multiplication
Sensors, 2015 To enhance the performance of location estimation in wireless positioning systems, the geometric dilution of precision (GDOP) is widely used as a criterion for selecting measurement units.
Chien-Sheng Chen
doaj +1 more source
IET Radar, Sonar &Navigation, Volume 17, Issue 10, Page 1498-1506, October 2023., 2023 Based on the time difference direction‐finding algorithm, new mathematical expressions of geometric dilution of precision (GDOP) are presented in Time Difference of Arrival positioning systems in this paper. The time difference direction‐finding reveals that the angle measurements are accurate for any length of baseline.
Yang Bai +3 more
wiley +1 more source
VDES R‐Mode performance analysis and experimental results
International Journal of Satellite Communications and Networking, Volume 41, Issue 2, Page 158-177, March/April 2023., 2023 As maritime shipping relies almost exclusively on GNSS, there has been a demand for a backup system in case of a GNSS failure. We introduce and theoretically analyze the positioning performance of VDES R‐Mode as a candidate for an alternative maritime navigation system.
Markus Wirsing +2 more
wiley +1 more source
The Research on GDOP of PL-Aided Beidou Positioning System
Kongjian Kexue Xuebao, 2005 null WANG Wei +2 more
exaly +2 more sources
A Deep Learning Method for NLOS Error Mitigation in Coastal Scenes
Journal of Marine Science and Engineering, 2022 With the widespread use of automatic identification systems (AISs), some ships use deceptive information or intentionally close their AISs to conceal their illegal activities or evade the supervision of maritime departments.
Chao Sun +5 more
doaj +1 more source