Results 1 to 10 of about 12,661 (218)

Precise Point Positioning with the BeiDou Navigation Satellite System [PDF]

Sensors, 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.
Min Li, Lizhong Qu, Qile Zhao, Jing Guo, Xing Su, Xiaotao Li   +5 more
doaj   +6 more sources

Performance Analysis of Beidou-2/Beidou-3e Combined Solution with Emphasis on Precise Orbit Determination and Precise Point Positioning [PDF]

Sensors, 2018
In 2015, the plan for global coverage by the Chinese BeiDou Navigation Satellite System was launched. Five global BeiDou experimental satellites (BeiDou-3e) are in orbit for testing.
Xiaolong Xu, Min Li, Wenwen Li, Jingnan Liu   +3 more
doaj   +5 more sources

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

Sensors
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, Jie Ding, Xin Shu, Wenwen Xu, Yunzhi Wu   +4 more
doaj   +2 more sources

Feasibility of Code-Level Altimetry Using Coastal BeiDou Reflection (BeiDou-R) Setups

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2015
With the development of the Chinese BeiDou satellite navigation system, the applications of BeiDou-reflected (BeiDou-R) signals will play a key role in Global Navigation Satellite System-reflected (GNSS-R) signals. In this paper, we describe the theory of code-level ocean surface altimetry using BeiDou-R signals.
Yun Zhang, Yan-Ling Han, Zhonghua Hong
exaly   +2 more sources

Overcoming the Challenges of BeiDou Receiver Implementation [PDF]

Sensors, 2014
Global Navigation Satellite System (GNSS)-based positioning is experiencing rapid changes. The existing GPS and the GLONASS systems are being modernized to better serve the current challenging applications under harsh signal conditions.
Mohammad Zahidul H. Bhuiyan, Stefan Söderholm, Sarang Thombre, Laura Ruotsalainen, Heidi Kuusniemi   +4 more
doaj   +3 more sources

Enhancing BeiDou/GNSS integrity with minmax optimization. [PDF]

PNAS Nexus
Abstract In navigation scenarios, integrity is a crucial metric for evaluating system availability, with improvements in integrity having implications for transportation, security, and surveillance. This article proposes a novel integrity monitoring strategy, termed the optimal advanced receiver autonomous integrity monitoring ...
Qiu J, Chen C, Lei S, Lyu Y, Xie S.
europepmc   +2 more sources

Initial Results of the Precise Orbit Determination for the New-Generation BeiDou Satellites (BeiDou-3) Based on the iGMAS Network

ISPRS International Journal of Geo-Information, 2016
By August 2016, 5 new-generation BeiDou satellites (BeiDou-3) have successfully been launched. The observations of a very limited number of 9 International GNSS (Global Navigation Satellite System) Monitoring and Assessment Service (iGMAS) stations and ...
Bingfeng Tan, Yunbin Yuan, Mingyue Wen, Yafei Ning, Xifeng Liu   +4 more
doaj   +3 more sources

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

BMC 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, Chen Ye, Pei-Yun Peng, Hui-Xin Zhai, Iftikhar Ahmad, Chuan Xia, Yun-Zhi Wu, You-Hua Zhang   +7 more
doaj   +1 more source

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

Agriculture, 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, Cheng Zhang, Xi Cheng, Yi Yue, Guohua Fan, Yunzhi Wu, Youhua Zhang   +6 more
doaj   +1 more source

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

PeerJ, 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, Yueyue Shen, Youhua Zhang, Fei Liu, Zhiyu Ma, Zhenyu Yue, Yi Yue   +6 more
doaj   +2 more sources