Results 1 to 10 of about 14,978 (220)

Voice and Position Simultaneous Communication System Based on Beidou Navigation Constellation [PDF]

open access: goldXibei Gongye Daxue Xuebao, 2020
Considering China Beidou has unique two-way communication capability for short messages that are not available in other navigation systems such as GPS, a 600bps vocoder adapted to the short message channel of Beidou is developed.
Zhen Ao, Feng Li, Qiang Ma, Guiqing He
doaj   +2 more sources

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

open access: diamondNavigation, 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   +3 more
doaj   +2 more sources

LSOS: An FG Position Method Based on Group Phase Ranging Ambiguity Estimation of BeiDou Pseudolite [PDF]

open access: goldRemote Sensing, 2023
Due to the influence of indoor space environments, the carrier phase information obtained by the BeiDou pseudo-satellite often has the issue of cycle slips, which makes the user unable to carry out high-precision positioning.
Heng Zhang, Shuguo Pan
doaj   +2 more sources

FFAE-UNet: An Efficient Pear Leaf Disease Segmentation Network Based on U-Shaped Architecture [PDF]

open access: yesSensors
The accurate pest control of pear tree diseases is an urgent need for the realization of smart agriculture, with one of the key challenges being the precise segmentation of pear leaf diseases.
Wenyu Wang   +4 more
doaj   +2 more sources

Precise Point Positioning with the BeiDou Navigation Satellite System

open access: yesSensors, 2014
By the end of 2012, China had launched 16 BeiDou-2 navigation satellites that include six GEOs, five IGSOs and five MEOs. This has provided initial navigation and precise pointing services ability in the Asia-Pacific regions.
Qile Zhao, Jing Guo, Xing Su
exaly   +3 more sources

BeiDou Geostationary Satellite Code Bias Modeling Using Fengyun-3C Onboard Measurements [PDF]

open access: goldSensors, 2017
This study validated and investigated elevation- and frequency-dependent systematic biases observed in ground-based code measurements of the Chinese BeiDou navigation satellite system, using the onboard BeiDou code measurement data from the Chinese ...
Kecai Jiang   +4 more
doaj   +2 more sources

Method for Classifying Apple Leaf Diseases Based on Dual Attention and Multi-Scale Feature Extraction

open access: yesAgriculture, 2023
Image datasets acquired from orchards are commonly characterized by intricate backgrounds and an imbalanced distribution of disease categories, resulting in suboptimal recognition outcomes when attempting to identify apple leaf diseases.
Jie Ding   +6 more
doaj   +1 more source

IdentPMP: identification of moonlighting proteins in plants using sequence-based learning models [PDF]

open access: yesPeerJ, 2021
Background A moonlighting protein refers to a protein that can perform two or more functions. Since the current moonlighting protein prediction tools mainly focus on the proteins in animals and microorganisms, and there are differences in the cells and ...
Xinyi Liu   +6 more
doaj   +2 more sources

A deep learning framework for identifying essential proteins based on multiple biological information

open access: yesBMC Bioinformatics, 2022
Background Essential Proteins are demonstrated to exert vital functions on cellular processes and are indispensable for the survival and reproduction of the organism.
Yi Yue   +7 more
doaj   +1 more source

Validation of the accuracy of geodetic automated measurement system based on GNSS platform for continuous monitoring of surface movements in post-mining areas

open access: yesReports on Geodesy and Geoinformatics, 2021
The problem involving the monitoring of surface ground movements in post-mining areas is particularly important during the period of mine closures. During or after flooding of a mine, mechanical properties of the rock mass may be impaired, and this may ...
Sokoła-Szewioła Violetta   +1 more
doaj   +1 more source

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