Results 61 to 70 of about 783,650 (212)

Investigation of the capability of multi-GNSS PPP-AR method in detecting permanent displacements

International Journal of Engineering and Geosciences, 2023
The traditional-precise point positioning (PPP) technique may provide a positioning as precise as the relative positioning technique in long-term observation durations. However, since it cannot provide high-precision positioning due to ambiguity problem in short-term observations, the interest in the PPP-AR (Ambiguity Resolution) technique has ...
Mert BEZCİOĞLU, Tayyib UCAR, Cemal Özer YİĞİT   +2 more
openaire   +2 more sources

Estimation of fractional cycle bias for GPS/BDS-2/Galileo based on international GNSS monitoring and assessment system observations using the uncombined PPP model

Satellite Navigation, 2021
The Fractional Cycle Bias (FCB) product is crucial for the Ambiguity Resolution (AR) in Precise Point Positioning (PPP). Different from the traditional method using the ionospheric-free ambiguity which is formed by the Wide Lane (WL) and Narrow Lane (NL)
Jin Wang, Qin Zhang, Guanwen Huang
doaj   +1 more source

Al1−xHfxN$\text{Al$_{1-x}$Hf$_{x}$N}$ Thin Films with Enhanced Piezoelectric Responses for GHz Surface Acoustic Wave Devices

Advanced Electronic Materials, EarlyView.
Reactively sputtered wurtzite Al1‐xHfxN thin films, exhibiting strong c‐axis texture and enhanced piezoelectric response, are demonstrated as a cost‐effective alternative to Al1‐xScxN. X‐ray absorption spectroscopy reveals that cross‐gap N 2p–Hf 5d hybridization increases the Born effective charge and enables a multifold increase in piezoelectric ...
Laura I. Wagner, Verena Streibel, Esperanza Luna, Katarina S. Flashar, Valentin Walbrunn, Walid Anders, Nicole Volkmer, Doreen Steffen, Katrin Morgenroth, Frans Munnik, Tsedenia A. Zewdie, Saswati Santra, Jutta Schwarzkopf, Ian D. Sharp, Mingyun Yuan   +14 more
wiley   +1 more source

Managing Biodiversity Disclosure in Global Firms: How Culture, Institutions and Risk Shape Corporate Reporting

Business Strategy and the Environment, EarlyView.
ABSTRACT This study examines the drivers of biodiversity disclosure and the interplay between firm strategies and national institutions in shaping transparency. Using a global panel of 4703 firms across 40 economies from 2013 to 2022, we integrate differentiation, signalling and institutional perspectives to explain variation in reporting behaviour ...
Chi Chen, Yaman O. Erzurumlu, Giray Gozgor   +2 more
wiley   +1 more source

Automating Sustainability: How Climate Action Unlocks the ESG Potential of Industrial Robotics

Business Strategy and the Environment, EarlyView.
ABSTRACT The convergence of Industry 4.0 and global sustainability goals presents a critical paradox: while automation drives efficiency, its net impact on comprehensive environmental, social, and governance (ESG) performance remains contested. This study investigates the relationship between industrial robot and country‐level ESG performance across 63
Brahim Bergougui
wiley   +1 more source

Designing a Triplet 2‐Formylphenylnitrene With Fast Tunneling Reactivity

Chemistry – A European Journal, EarlyView.
A 3‐CF3 substituent accelerates tunneling in triplet 2‐formylphenylnitrene, making its reactivity in cryogenic matrices too fast for conventional IR spectroscopic detection. Bringing this chemistry to low‐temperature solutions allows suppression of intrinsic nitrene dimerization through faster cyclization, which even outcompetes the 1,4‐H shift ...
Sofia Braz, Cláudio M. Nunes, Simon Schlosser, Peter R. Schreiner, Rui Fausto   +4 more
wiley   +1 more source

Assessment of global and regional UPD for BDS/GNSS PPP-AR at low latitudes during quiet and geomagnetic storm periods

International Journal of Applied Earth Observations and Geoinformation
The resolution of ambiguity (AR) is of paramount importance for the precise point positioning (PPP) technique, as it enables the reduction of convergence duration and the improvement of positioning accuracy. Uncalibrated phase delay (UPD) is a key factor
Jun Tang, Wei Zhang, Yibin Yao, Chaoqian Xu, Liang Zhang, Youkun Wang   +5 more
doaj   +1 more source

Controllable Topological Domain Arrays in Periodically Wrinkle‐Patterned Pb(Zr0.2,Ti0.8)O3 Thin Films

Information &Functional Materials, EarlyView.
We demonstrate reversible mechanical and electrical control of ordered center‐type topological domains in wrinkled PZT films, with high‐conductivity channels at domain cores, enabling multifield manipulation for future topological devices. ABSTRACT Ferroelectric topological domain textures hold promise as key building blocks for next‐generation ...
Jiahui Zhao, Houlin Zhou, Yuyin Yang, Guo Tian, Huiyang Liu, Jiaqi Zhang, Fengbo Yan, Shuai Ning, Hua Fan, Zhen Fan, Ji‐Yan Dai, Jun‐Ming Liu, Xingsen Gao   +12 more
wiley   +1 more source

Zrychlení řešení celočíselných ambiguit v PPP při použití ionosférických zpoždění

, 2022
Precise Point Positioning (PPP) je metoda výhodná pro zpracování GNSS dat v případě, že jsou dostupné observace z jediného přijímače. Protože systematické vlivy nejsou elimivovány pomocí diferencí mezi přijímači, je pro přesné určování polohy nezbytné ...
Pavel Václavovic, Lewen Zhao, Jan Douša, Nosek, Jakub, Douša, Jan, Jakub Nosek, Václavovic, Pavel, Zhao, Lewen   +7 more
core   +1 more source

Enhancing Precise Point Positioning Under Active Ionosphere Using Wide-Range Ionospheric Corrections Derived from MADOCA Service

Applied Sciences
The performance of the MADOCA-PPP (Multi-GNSS Orbit and Clock Augmentation-Precise Point Positioning) wide-range ionospheric correction requires further investigation during periods of high ionospheric activity, particularly regarding its impact on the ...
Qianqian Bian, Xiao Yin
doaj   +1 more source