Results 61 to 70 of about 2,198 (176)

Enhanced off-grid DOA estimation by corrected power Bayesian inference using difference coarray

open access: yesThe Journal of Engineering, 2019
Sparse Bayesian inference for on-grid direction-of-arrival (DOA) estimation using difference coarray was investigated in the authors’ previous work to estimate more signal sources than the number of physical antenna elements. Sparse Bayesian inference is
Yanan Ma, Xianbin Cao, Xiangrong Wang
doaj   +1 more source

Cerebral Hemodynamic Changes During Cardiac Surgery: A Feasibility MR Study in Piglets

open access: yesNMR in Biomedicine, Volume 39, Issue 5, May 2026.
Congenital heart disease surgery in infants requires cardiopulmonary bypass (CPB), which increases the risk of brain injury. Conventional heart‐lung machines (HLMs) cannot operate inside MRI scanners, limiting real‐time assessment of cerebral changes. We developed an MR‐conditional HLM and tested it in piglets during CPB.
Dominik T. Schulte   +13 more
wiley   +1 more source

A combined BP‐MF algorithm for wideband off‐grid DOA estimation with DP prior

open access: yesElectronics Letters, 2022
Direction‐of‐arrival (DOA) estimation based on sparse Bayesian learning (SBL) framework has attracted extensive attention. The accuracy of on‐grid DOA estimation is restricted by the prescribed grid, while off‐grid approaches resolves the problem of grid
Mengge Li   +3 more
doaj   +1 more source

Evaluation of Genetics in the Association Between Cardiorespiratory Fitness and Health

open access: yesScandinavian Journal of Medicine &Science in Sports, Volume 36, Issue 5, May 2026.
ABSTRACT We evaluated how much cardiorespiratory fitness (CRF)‐related genetics contribute to the risk of common noncommunicable diseases (NCDs) and mortality, and whether individuals with different levels of CRF and genetic predispositions differ in health characteristics.
L. Joensuu   +663 more
wiley   +1 more source

Satellite‐Based Detection of Methane Emissions From Permafrost Peatland Warming

open access: yesGeophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Column‐averaged methane (XCH4) observations spanning 2018–2023 by the Tropospheric Monitoring Instrument (TROPOMI) on the Sentinel‐5 Precursor satellite are assessed for evidence of methane (CH4) emissions from permafrost regions. Bi‐monthly TROPOMI XCH4 anomaly maps and soil temperature (Tsoil) anomaly maps from reanalysis data are generated ...
Ray Nassar   +7 more
wiley   +1 more source

Direction-of-Arrival Estimation of Virtual Array Signals Based on Doppler Effect

open access: yesInternational Journal of Distributed Sensor Networks, 2015
The estimation accuracy of direction-of-departure (DOD) and direction-of-arrival (DOA) is reduced because of Doppler shifts caused by the high-speed moving sources.
Feng Zhao, Xia Hao, Hongbin Chen
doaj   +1 more source

A Sum-of-Squares and Semidefinite Programming Approach for Maximum Likelihood DOA Estimation

open access: yesSensors, 2016
Direction of arrival (DOA) estimation using a uniform linear array (ULA) is a classical problem in array signal processing. In this paper, we focus on DOA estimation based on the maximum likelihood (ML) criterion, transform the estimation problem into a ...
Shu Cai, Quan Zhou, Hongbo Zhu
doaj   +1 more source

Electromagnetic Perception With Artificial Intelligence‐Empowered Programable Metasurface: From Data‐Driven Imaging to Semantic Sensing

open access: yesAdvanced Photonics Research, Volume 7, Issue 4, April 2026.
This review chronicles the evolution of intelligent electromagnetic (EM) perception systems empowered by metasurfaces and artificial intelligence. The progression from data‐driven imaging with implicit priors to semantic sensing with explicit priors is systematically reviewed.
Xingrui Zhou   +5 more
wiley   +1 more source

Polynomial Manifold Interpolation for Direction Finding in the Presence of Mutual Coupling

open access: yesIEEE Access, 2019
Direction-of-arrival (DOA) estimation in the presence of mutual coupling among the antennas is an important problem in direction finding systems. To address the mutual coupling issue, a polynomial manifold interpolation approach is proposed in this paper.
Hongtao Duan   +4 more
doaj   +1 more source

A Comprehensive Review of Direction of Arrival (DoA) Estimation Techniques and Algorithms

open access: yesJournal of Electronics and Electrical Engineering
Direction of Arrival (DOA) estimation is a pivotal aspect of Array Signal Processing (ASP) with significant implications for the performance of modern communication systems. This paper provides a comprehensive review of DOA estimation techniques, encompassing both classical and advanced algorithms.
Saanvi Kulkarni   +5 more
openaire   +1 more source

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