Results 31 to 40 of about 3,904 (159)

Research on Beidou and GPS dual satellite positioning algorithms for substation site positioning

International Journal of Metrology and Quality Engineering, 2020
With the rapid development of global satellite navigation system technology, multi-mode satellite navigation positioning technology that can be compatible with multiple navigation systems at the same time is bound to become the future development trend ...
Feng Junjie, Shi Junfeng, Gao Lei, Huang Hongwei   +3 more
doaj   +1 more source

Analysis of the Bias on the Beidou GEO Multipath Combinations [PDF]

Sensors, 2016
The Beidou navigation satellite system is a very important sensor for positioning in the Asia-Pacific region. The Beidou inclined geosynchronous orbit (IGSO) and medium Earth orbit (MEO) satellites have been analysed in some studies previously conducted by other researchers; this paper seeks to gain more insight regarding the geostationary earth orbit (
Yafei Ning, Yunbin Yuan, Yanju Chai, Yong Huang   +3 more
openaire   +3 more sources

Global Navigation Satellite Systems - Perspectives on Development and Threats to System Operation [PDF]

TransNav, 2016
The rapid development of satellite navigation and timing technologies and the broad availability of user equipment and applications has dramatically changed the world over the last 20 years.
Krzysztof Czaplewski, Dana Goward
doaj   +1 more source

Cherry defect and classification detection based on improved YOLOX model

Shipin yu jixie, 2023
Objective: In order to expand the scope of cherry sales and achieve rapid grading of cherries under industrial conditions. Methods: Firstly, the YOLOX network was used to detect the defective fruit, in order to solve some problems where the defect was ...
LIU Jing-yu, PEI Yue-kun, CHANG Zhi-yuan, CHAI Zhi, CAO Pei-pei   +4 more
doaj   +1 more source

The New Improved ZHD and Weighted Mean Temperature Models Based on GNSS and Radiosonde Data Using GPT3 and Fourier Function

Atmosphere, 2022
Compared to the zenith hydrostatic delay (ZHD) obtained from the Saastamonien model based on in-situ measured meteorological (IMM) data and radiosonde-derived weighted mean temperature (Tm), the ZHD and Tm deviations of the GPT3 model have shown obvious ...
Li Li, Ying Gao, Siyi Xu, Houxian Lu, Qimin He, Hang Yu   +5 more
doaj   +1 more source

Novel hypoxia-related gene signature for predicting prognoses that correlate with the tumor immune microenvironment in NSCLC

Frontiers in Genetics, 2023
Background: Intratumoral hypoxia is widely associated with the development of malignancy, treatment resistance, and worse prognoses. The global influence of hypoxia-related genes (HRGs) on prognostic significance, tumor microenvironment characteristics ...
Zhaojin Li, Yu Cui, Shupeng Zhang, Jie Xu, Jianping Shao, Hekai Chen, Jingzhao Chen, Shun Wang, Meizhai Zeng, Hao Zhang, Siqian Lu, Zhi Rong Qian, Guoqiang Xing   +12 more
doaj   +1 more source

Time-space intelligent management and dispatch of electric Beidou based on Beidou and digital twin technology

Journal of Physics: Conference Series, 2023
Abstract Aiming at the increasingly complex management and dispatching problems of power system, this paper combines Beidou precise space-time technology with digital twin system theory, and puts forward a method of constructing intelligent management and dispatching platform of power grid. The method combines Beidou and IoT (Internet of
Zanyou Su, Liming Lin, Yifei Wang
openaire   +1 more source

Software implementation of BeiDou B1I code generator using Matlab/Simulink

, 2022
Conventional Matlab implementation of software ranging code generator requires code shifts to produce the ranging codes assigned to different satellites.
Ni, W, Wu, D, Chen, W
core   +1 more source

Research Article. Improved Dual Frequency PPP Model Using GPS and BeiDou Observations

Journal of Geodetic Science, 2017
This paper introduces a new dual-frequency precise point positioning (PPP) model, which combines GPS and BeiDou observations. Combining GPS and BeiDou observations in a PPP model offers more visible satellites to the user, which is expected to enhance ...
Afifi A., El-Rabbany A.
doaj   +1 more source

A Station-Specific Ionospheric Modeling Method for the Estimation and Analysis of BeiDou-3 Differential Code Bias Parameters

Navigation, 2022
A modified generalized trigonometric series (GTS) function is presented for the joint estimation of local ionospheric activities and differential code biases (DCBs) of the third-generation BeiDou navigation satellite system (BeiDou-3).
Ningbo Wang, Zishen Li, Andrzej Krankowski, Xingliang Huo   +3 more
doaj   +1 more source