Results 41 to 50 of about 2,371 (202)

Single Epoch Ambiguity Resolution of Small-Scale CORS with Multi-Frequency GNSS

Remote Sensing, 2021
The network real-time kinematic (RTK) technique uses continuously operating reference stations (CORS) within a geographic area to model the distance dependent errors, allowing users in the area to solve ambiguities.
Shengyue Ji, Qianli Zheng, Duojie Weng, Wu Chen, Zhenjie Wang, Kaifei He   +5 more
doaj   +1 more source

Modeling and parameter estimation for fractional large‐scale interconnected Hammerstein systems

Asian Journal of Control, EarlyView.
Abstract This paper addresses the challenge of modeling and identifying large‐scale interconnected systems exhibiting memory effects, hereditary properties, and non‐local interactions. We propose a fractional‐order extension of the Hammerstein architecture that incorporates Grünwald–Letnikov operators to capture complex dynamics through multiple ...
Mourad Elloumi, Omar Naifar, Imed Bouzida   +2 more
wiley   +1 more source

Pharmacokinetics and pharmacodynamics of intravenous and oral (S)‐ketamine: Investigating metabolite contribution to subjective effects

British Journal of Clinical Pharmacology, EarlyView.
Aims Oral administration of (S)‐ketamine for treatment‐resistant depression (TRD), as alternative to the registered intranasal or off‐label intravenous administrations, has high potential. However, it is characterized by an extensive first‐pass metabolism, resulting in low (S)‐ketamine exposure and high levels of active metabolites, including (S ...
Marije E. Otto, Gabriël E. Jacobs, Joost C. van Mechelen, Laura G. J. M. Borghans, Johan G. C. van Hasselt, Linda B. S. Aulin   +5 more
wiley   +1 more source

Improved GNSS Ambiguity Fast Estimation Reduction Algorithm

Sensors, 2023
The fast and accurate solution of integer ambiguity is the key to achieve GNSS high-precision positioning. Based on the lattice theory of high-dimensional ambiguity solving, the reduction time consumption is much larger than the search time consumption ...
Xinzhong Li, Yongliang Xiong, Weiwei Chen, Shaoguang Xu, Rui Zhang   +4 more
doaj   +1 more source

A goodness‐of‐fit test for regression models with discrete outcomes

Canadian Journal of Statistics, EarlyView.
Abstract Regression models are often used to analyze discrete outcomes, but classical goodness‐of‐fit tests such as those based on the deviance or Pearson's statistic can be misleading or have little power in this context. To address this issue, we propose a new test, inspired by the work of Czado et al.
Lu Yang, Christian Genest, Johanna G. Nešlehová   +2 more
wiley   +1 more source

ON THE REALISTIC STOCHASTIC MODEL OF GPS OBSERVABLES: IMPLEMENTATION AND PERFORMANCE [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
High-precision GPS positioning requires a realistic stochastic model of observables. A realistic GPS stochastic model of observables should take into account different variances for different observation types, correlations among different observables ...
F. Zangeneh-Nejad, A. R. Amiri-Simkooei, M. A. Sharifi, J. Asgari   +3 more
doaj   +1 more source

Government affiliation and innovation in emerging market firms: The role of international diversification

Global Strategy Journal, EarlyView.
Abstract Research Summary This study examines how international diversification interacts with government affiliation to shape innovation outcomes in emerging market firms. We reconceptualize government affiliation as a resource‐structuring mechanism that varies across hierarchical levels and influences the coherence of firms' dominant logics of ...
Danielle R. Combs, Fiona Kun Yao, Chunlin Liu, Ting Xiao   +3 more
wiley   +1 more source

Detailed Investigation on Ambiguity Validation of Long-Distance RTK

Remote Sensing
Long-distance Real-Time Kinematic (RTK) positioning is crucial for applications in remote areas, such as maritime environments. Achieving 2–3 cm accuracy with RTK requires successful ambiguity resolution, which involves two main steps: identifying the ...
Shengyue Ji, Jing Wang, Duojie Weng, Wu Chen   +3 more
doaj   +1 more source

The Inertial Attitude Augmentation for Ambiguity Resolution in SF/SE-GNSS Attitude Determination

Sensors, 2014
The Unaided Single Frequency/Single Epoch Global Navigation Satellite System (SF/SE GNSS) model is the most challenging scenario for ambiguity resolution in the GNSS attitude determination application.
Jiancheng Zhu, Xiaoping Hu, Jingyu Zhang, Tao Li, Jinling Wang, Meiping Wu   +5 more
doaj   +1 more source

A Review of GNSS Carrier Phase Ambiguity Resolution and Conceptual AI-Driven Approaches

Engineering Proceedings, 2023
Precise Point Positioning (PPP) with Integer Ambiguity Resolution (IAR) is an effective way of improving the overall performance of the PPP technique both in terms of convergence time and accuracy. Even though PPP-IAR has seen a tremendous development in
Amarildo Haxhi, Vassilis Gikas
doaj   +1 more source