Results 31 to 40 of about 6,207 (200)

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

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

Differential Code Bias Estimation using Multi-GNSS Observations and Global Ionosphere Map [PDF]

, 2014
Measurements of Global Navigation Satellite System (GNSS) receivers are affected by systematic offsets re- lated to group and phase delays of the signal generation and processing chain.
Hauschild, André, Steigenberger, Peter, Montenbruck, Oliver, Montenbruck, O.;Hauschild, A.;Steigenberger, P.   +3 more
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

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

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

The Ionospheric Scintillation Effects on the BeiDou Signal Receiver [PDF]

Sensors, 2016
Irregularities in the Earth’s ionosphere can make the amplitude and phase of radio signals fluctuate rapidly, which is known as ionospheric scintillation. Severe ionospheric scintillation could affect the performance of the Global Navigation Satellite System (GNSS). Currently, the Multiple Phase Screen (MPS) technique is widely used in solving problems
Zhijun He 0003, Hongbo Zhao 0001, Wenquan Feng   +2 more
openaire   +3 more sources

An Integrated Vessel Tracking System by Using AIS, Inmarsat and China Beidou Navigation Satellite System [PDF]

TransNav, 2012
As there are more and more Automatic Identification System (AIS) sets have been deployed onboard, it is getting easier for people to trace vessels. Today, many online vessel monitoring services have been developed; however, most of them are based on AIS ...
Chun Yang, Qinyou Hu, Xinghua Tu, Jie Geng   +3 more
doaj  

MTAGCN: predicting miRNA-target associations in Camellia sinensis var. assamica through graph convolution neural network

BMC Bioinformatics, 2022
Background MircoRNAs (miRNAs) play a central role in diverse biological processes of Camellia sinensis var.assamica (CSA) through their associations with target mRNAs, including CSA growth, development and stress response.
Haisong Feng, Ying Xiang, Xiaosong Wang, Wei Xue, Zhenyu Yue   +4 more
doaj   +1 more source