Results 81 to 90 of about 15,115 (213)
High‐speed target imaging for vortex electromagnetic wave radar
IET Radar, Sonar & Navigation, 2022 Vortex electromagnetic waves (VEMWs) carrying orbital angular momentum (OAM) are promising to benefit the higher degree of freedom for inverse synthetic aperture radar (ISAR) imaging on account of their helical wavefront.
Yu‐Ang Zhou +4 more
doaj +1 more source
Efficient range alignment algorithm for real-time range-Doppler algorithm [PDF]
, 2017 When deriving a range-Doppler image or a time-frequency image of a fast-maneuvering target at long range, existing range alignment methods yield poor results due to the large numbers of range profiles (RPs) and range bins that are required for this task.
Bae, J.-H. +4 more
core +1 more source
Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.Abstract Acute, traumatic meniscus tears are common and should be repaired whenever possible. However, the biological age of the patient, along with the specific tear morphology, may significantly influence the selection of the repair technique, expected clinical outcomes and the postoperative rehabilitation protocol.
Armin Runer +15 more
wiley +1 more source
Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.Abstract Purpose Robotic‐arm‐assisted surgery is increasingly used in orthopaedics due to its potential clinical benefits. This real‐world data analysis evaluated the impact of image‐based, robotic‐arm‐assisted total knee arthroplasty (raTKA) over non‐robotic‐arm‐assisted total knee arthroplasty (nraTKA) on perioperative outcomes in Germany based on a ...
Lars‐Rene Tuecking +7 more
wiley +1 more source
Fully‐Constrained Variable Projection for Water‐Fat Models
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Variable projection (VARPRO) is an effective technique to reduce the dimensionality of least squares optimization problems through the elimination of linear parameters. For water‐fat models, constrained VARPRO variants have been proposed in the literature to ensure that water and fat components are aligned at TE = 0, thereby preventing
Carl Ganter +4 more
wiley +1 more source
A Fast and Accurate Compressed Sensing Reconstruction Algorithm for ISAR Imaging
IEEE Access, 2019 Compressed sensing (CS) has provided a novel way for inverse synthetic aperture radar (ISAR) imaging. In CS based ISAR imaging, the continuous range-Doppler plane is divided into grids, and the strong scattering points are assumed on the grids.
Ping Cheng +3 more
doaj +1 more source
A nonquadratic regularization-based technique for joint SAR imaging and model error correction [PDF]
, 2008 Regularization based image reconstruction algorithms have successfully been applied to the synthetic aperture radar (SAR) imaging problem. Such algorithms assume that the mathematical model of the imaging system is perfectly known.
Cetin, Mujdat +3 more
core +1 more source
Global Policy, EarlyView.ABSTRACT This article explores the current controversies surrounding the European Ariane launcher and its implications for the future of European space governance. The Ariane program, historically a symbol of European technopolitical integration, faces mounting challenges due to delays, rising costs and increasing competition from private actors like ...
Nina Klimburg‐Witjes, Joseph Popper
wiley +1 more source
Logarithmic Laplacian Prior Based Bayesian Inverse Synthetic Aperture Radar Imaging
Sensors, 2016 This paper presents a novel Inverse Synthetic Aperture Radar Imaging (ISAR) algorithm based on a new sparse prior, known as the logarithmic Laplacian prior.
Shuanghui Zhang +3 more
doaj +1 more source
Three dimensional scattering center imaging techniques [PDF]
Two methods to image scattering centers in 3-D are presented. The first method uses 2-D images generated from Inverse Synthetic Aperture Radar (ISAR) measurements taken by two vertically offset antennas.
Burnside, W. D., Younger, P. R.
core +1 more source