Results 31 to 40 of about 8,291 (120)

A New Weighting Approach with Application to Ionospheric Delay Constraint for GPS/GALILEO Real-Time Precise Point Positioning

Applied Sciences, 2018
The real-time precise point positioning (RT PPP) technique has attracted increasing attention due to its high-accuracy and real-time performance. However, a considerable initialization time, normally a few hours, is required in order to achieve the ...
Tianjun Liu, Jian Wang, Hang Yu, Xinyun Cao, Yulong Ge   +4 more
doaj   +1 more source

Assessment of real-time global ionosphere maps from different analysis centres and their impact on BeiDou-3 single-frequency real-time precise point positioning

Frontiers in Astronomy and Space Sciences
Real-time global ionosphere map (RT-GIM) products can provide global ionospheric information in real time and are widely used for space weather monitoring and global navigation satellite system (GNSS) positioning, particularly for low-cost and single ...
Yaqi Rao, Tianjun Liu, Hua Chen, Hua Chen, Xingyu Zhou, Ang Liu, Weiping Jiang   +6 more
doaj   +1 more source

Performance Analysis of Multi-GNSS Real-Time PPP-AR Positioning Considering SSR Delay

Remote Sensing
For real-time (RT) precise point positioning (PPP), the state space representation (SSR) information is often delayed due to possible communication delays and specific broadcast intervals.
Xuefeng Mu, Li Wang, Bao Shu, Yunqing Tian, Xinrui Li, Tijun Lei, Guanwen Huang, Qin Zhang   +7 more
doaj   +1 more source

5'PPP-RNA induced RIG-I activation inhibits drug-resistant avian H5N1 as well as 1918 and 2009 pandemic influenza virus replication

Virology Journal, 2010
Background Emergence of drug-resistant strains of influenza viruses, including avian H5N1 with pandemic potential, 1918 and 2009 A/H1N1 pandemic viruses to currently used antiviral agents, neuraminidase inhibitors and M2 Ion channel blockers, underscores
García-Sastre Adolfo, Gubareva Larisa, Gangappa Shivaprakash, Wiens Mayim E, Jeisy-Scott Victoria, Hoelscher Mary A, Bowzard John B, Pearce Melissa B, Davis William G, Zeng Hui, Deyde Varough, Jayashankar Lakshmi, Ranjan Priya, Katz Jacqueline M, Tumpey Terrence M, Fujita Takashi, Sambhara Suryaprakash   +16 more
doaj   +1 more source

A feedback loop of PPP and PI3K/AKT signal pathway drives regorafenib-resistance in HCC

Cancer & Metabolism, 2023
Background Hepatocellular carcinoma (HCC) is a principal type of liver cancer with high incidence and mortality rates. Regorafenib is a novel oral multikinase inhibitor for second-line therapy for advanced HCC.
Huihua Yang, Dahong Chen, Yafei Wu, Heming Zhou, Wenjing Diao, Gaolin Liu, Qin Li   +6 more
doaj   +1 more source

Multi-Global Navigation Satellite System (GNSS) real-time tropospheric delay retrieval based on state-space representation (SSR) products from different analysis centers [PDF]

Annales Geophysicae
The troposphere plays an important role in a range of weather and various climate changes. With the development of the Global Navigation Satellite System (GNSS), the zenith tropospheric delay (ZTD) retrieval using GNSS technology has become a popular ...
W. Yao, H. Huang, X. Ma, Q. Zhang, Y. Yao, X. Lin, Q. Zhao, Y. Huang   +7 more
doaj   +1 more source

GKit-SSRDecoder: An Open-Source C/C++-Based PPP-B2b and HAS Decoding and Formatted Product Generation Software

IEEE Access
With the rapid development of Real-Time Precise Point Positioning (RT-PPP), the BeiDou-3 PPP-B2b and Galileo High Accuracy Service (HAS) have become pivotal for providing free, global, satellite-based precise correction services.
Zhiyuan Wu, Pan Li, Jiahuan Hu, Jingkai Yuan, Mingbao Wei, Yang Sun, Bao Shu, Bobin Cui, Guanwen Huang   +8 more
doaj   +1 more source

Real-Time Precise Positioning Performance of BDS-3 PPP-B2b: Evaluation and Marine Buoy Application

Journal of Marine Science and Engineering
This study decodes the BDS-3 PPP-B2b binary data broadcast by BDS satellites using a self-developed software decoder, RT-B2b (Real-Time PPP-B2b). The orbit, clock corrections, and differential code biases (DCB)—collectively referred to as State Space ...
Xiangyu Tian, Haojun Li, Xiao Yin, Tengfei Bai, Ren Wang, Jialong Sun   +5 more
doaj   +1 more source

Extracellular vesicles from platelet-poor plasma possess anti-inflammatory and anti-catabolic effects in chondrocytes stimulated with IL-1β or synovial membrane-conditioned media

Journal of Orthopaedic Surgery and Research
Background Although osteoarthritis (OA) is the most prevalent form of arthritis, there is still no effective treatment capable of combining immunomodulatory effects with cartilage repair.
Slavomira Gulova, Lucia Slovinska, Livia K. Fecskeova, Jana Bzdilova, Jana Matejova, Marko Moravek, Marek Lacko, Denisa Harvanova   +7 more
doaj   +1 more source

Assessing BeiDou-3 PPP-B2b with Signal-in-Space Ranging Error (SISRE) and Its Performances in Positioning and ZTD Estimation

Sensors
The PPP-B2b service of BeiDou-3 enables real-time precise point positioning (RT-PPP) through correction information contained in B2b signals, circumventing the reliance on ground-based network infrastructures.
Guangxing Wang, Fen Li, Wenhai Zhou, Guo Chen, Zhiyong Zhu, Xiaomin Jia, Qing An   +6 more
doaj   +1 more source