Results 41 to 50 of about 554 (164)

Multiple-hypothesis RAIM algorithm with an RRAIM concept [PDF]

Aircraft Engineering and Aerospace Technology, 2012
Purpose – This paper aims to develop and analyse a new multiple-hypothesis receiver autonomous integrity monitoring (RAIM) algorithm. The proposed algorithm can handle simultaneous multiple failures as well as a single failure. Design/methodology/approach – The proposed algorithm uses measurement residuals and satellite observation matrices of several ...
Ho Yun, Changdon Kee
openaire   +1 more source

Unveiling Alkali‐Induced Redox Modulation: In‐Situ Spectroscopic Insights from RWGS on Alkali‐Modified ZrO2‐Supported Cu Catalysts

Advanced Science, Volume 13, Issue 2, 9 January 2026.
Revisiting the prevailing views that alkali only enhances adsorption properties and stabilizes metal particles against sintering, this study highlights the key role of Na+ in modulating Cu redox properties. Na+ added via wet impregnation (WI) hinders Cu2+ reduction but promotes oxidation and leads to Cu site loss by sintering/coverage. In contrast, the
Abdallah I. M. Rabee, Thanh Huyen Vuong, Laura Kraußer, Hayder Abed, Hanan Atia, Nils Rockstroh, Henrik Lund, Stephan Bartling, Evgenii V. Kondratenko, Angelika Brückner, Jabor Rabeah   +10 more
wiley   +1 more source

Analysis of influence of ionosphere and troposphere model on RAIM availability of COMPASS

Tongxin xuebao, 2015
The ionosphere and troposphere are main error sources of satellite navigation system measurement and main factors of COMPASS availability. The influence of the ionosphere and troposphere delay error model on the RAIM availability of COMPASS is analyzed ...
Wei-dong JIAO, Zhi-hu TANG, Xiao-yun SHEN   +2 more
doaj   +2 more sources

Enhancing Safety‐Integrity of Localization Systems in Lane‐Keeping Scenarios Using a Self‐Supervised Spatial Temporal Deep Network

IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
Accurate and reliable real‐time localization for lane‐keeping underpins safe navigation in autonomous vehicles; however, these systems are frequently exposed to sensor faults induced by environmental disturbances, which can result in critical integrity failures.
Keng Wei Chou, Yao Jiun Huang, Kang Li
wiley   +1 more source

Patients′ Experience of a Migraine Patients′ School using a Multimodal Behavioural Treatment Approach—A Qualitative Pilot Study

Acta Neurologica Scandinavica, Volume 2026, Issue 1, 2026.
Objective High frequency/chronic migraine is a disabling pain disorder requiring both pharmacological and nonpharmacological strategies. Although multimodal behaviour approaches are increasingly used, there is limited qualitative research exploring patients′ perceived experience of participating in such interventions. We implemented a migraine patients′
Kerstin Hedborg, Birgitta Helmerson, Elisabet Waldenlind, A. Ingela M. Nilsson Remahl, Anna Sundholm, Ankit Dhoundiyal   +5 more
wiley   +1 more source

Runoff Response to Climate and Landscape Changes Under Variable Fraction of Snowfall in Precipitation

Water Resources Research, Volume 61, Issue 11, November 2025.
Abstract A warmer climate will change the fraction of snowfall in precipitation. The switch of precipitation types not only directly changes the runoff but also influences the response of runoff to other factors, such as landscape or precipitation, which is not fully understood in previous studies.
Guosen Shi, Bing Gao
wiley   +1 more source

A survey of GNSS receiver autonomous integrity monitoring: Research status and opportunities

Frontiers in Physics
Integrity monitoring is crucial in applications closely related to the safety of human life and property, such as aviation, maritime navigation, autonomous driving, and rail transportation.
Zhen Huang, Zhen Huang, Weihua Mou, Weihua Mou, Rui Wang, Pengpeng Li, Pengpeng Li, Zhicheng Lyu, Zhicheng Lyu, Gang Ou, Gang Ou   +10 more
doaj   +1 more source

A New Threat for Pseudorange-Based RAIM: Adversarial Attacks on GNSS Positioning

IEEE Access, 2019
Global Navigation Satellite System (GNSS) signals are very vulnerable to spoofing due to the low power level and opening service mode. Although pseudorange-based Receiver Autonomous Integrity Monitoring (RAIM) method performances effectively in spoofing ...
Yuan Sun, Li Fu
doaj   +1 more source

Photocatalytic Aqueous Reforming of Methyl Formate

Advanced Materials, Volume 37, Issue 39, October 2, 2025.
A 3d‐metal Cu‐based atomically dispersed photocatalyst, supported on modified g‐C₃N₄, facilitates the photocatalytic selective hydrogen (7.5 mmol gcat−1 of hydrogen; nothing else than H2 and CO2) generation from methyl formate. This diverse system functions under mild conditions, providing high hydrogen yield, selectivity, and enduring stability ...
Dongxu Zuo, Suman Pradhan, Manami Banerjee, Nils Rockstroh, Stephan Bartling, Abdallah I.M. Rabee, Xinxin Tian, Alina Skorynina, Aleksander Jaworski, Laura Simonelli, Jabor Rabeah, Haijun Jiao, Matthias Beller, Shoubhik Das   +13 more
wiley   +1 more source

An Anti-spoofing Algorithm using a Kalman Filter based ARAIM Algorithm [PDF]

Iranian Journal of Electrical and Electronic Engineering
The Receiver Autonomous Integrity Monitoring (RAIM) method uses additional information to detect and remove spoofing signals by analyzing pseudo-range measurements.
Maryam Moazedi, Mohammad Reza Mosavi, Diego Martín De Andrés   +2 more
doaj