Results 61 to 70 of about 1,803 (190)

A Novel Structural Assessment Technique to Prevent Damaged FRP-Wrapped Concrete Bridge Piers from Collapse [PDF]

, 2009
Repairing deteriorated concrete bridge piers using externally wrapped fiber reinforced polymer (FRP) composites have been proven as an effective approach. This technique has also been applied to low-rise building structures.
A Tommaso Di, AJ Kinloch, AR Hutchinson, B Akuthota, C Au, C Au, CKY Leung, H Toutanji, III Hamilton HR, J Li, JG Teng, MA Starnes, MF Green, MJ Chajes, MK Antoon, MQ Feng, O Buyukozturk, O Buyukozturk, O Buyukozturk, R Zoughi, RC Vekey De, SA Sheikh, ST Smith, VM Karbhari, VM Malhotra, W Hillger, YJ Kim   +26 more
core   +1 more source

A Method for Extracting and Imaging Weak Second‐Harmonic Signals in Harmonic Radar

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
Harmonic radar, as an emerging sensing technology, enables high‐sensitivity target detection and localization in complex environments by exploiting the nonlinear scattering characteristics of targets, such as the harmonic responses of electronic devices. Compared with conventional radar systems, it offers strong clutter suppression because most natural
Minglin He, Chong Song, Chenhao Zhao, Lin Yi, Ruihua Fan, Bingnan Wang   +5 more
wiley   +1 more source

Inverse Airborne Optical Sectioning

Drones, 2022
We present Inverse Airborne Optical Sectioning (IAOS), an optical analogy to Inverse Synthetic Aperture Radar (ISAR). Moving targets, such as walking people, that are heavily occluded by vegetation can be made visible and tracked with a stationary ...
Rakesh John Amala Arokia Nathan, Indrajit Kurmi, Oliver Bimber   +2 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., Jung, J.-H., Kim, K.-T., Kim, S.-H., Park, S.-H.   +4 more
core   +1 more source

An Improved Backprojection Autofocus Method for Synthetic Aperture Sonar

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
We propose an improved backprojection (BP) autofocus method for synthetic aperture sonar (SAS), which reduces the computational overhead of existing methods using Anderson acceleration (AA) and the sparsity of high‐intensity pixels in imagery. ABSTRACT Autofocus methods effectively compensate for multi‐source phase errors in synthetic aperture radar ...
Shiping Chen, Lulu Ren, Linzhe Wei, Pengfei Zhang, Peng Wang, Yu Li, Haining Huang   +6 more
wiley   +1 more source

Sparse aperture wide-angle inverse synthetic aperture radar imaging based on compressive sensing

The Journal of Engineering, 2019
In high-resolution inverse synthetic aperture radar (ISAR) imaging, if the authors enlarge observation angle, range migration would appear and that can cause defocus problem.
Hou Yingni, Wang Xia
doaj   +1 more source

Experimental Synthetic Aperture Radar with Dynamic Metasurfaces

, 2017
We investigate the use of a dynamic metasurface as the transmitting antenna for a synthetic aperture radar (SAR) imaging system. The dynamic metasurface consists of a one-dimensional microstrip waveguide with complementary electric resonator (cELC ...
Boyarsky, Michael, Fromenteze, Thomas, Imani, Mohammadreza F., Pulido-Mancera, Laura, Reynolds, Matthew, Sleasman, Timothy, Smith, David R.   +6 more
core   +3 more sources

High-resolution Side-view and Top-view Imaging Method of Ship Targets Using Multistatic ISAR [PDF]

Leida xuebao, 2012
How to obtain high-resolution images of ship targets is an active research area in radar field due to the complexity of the ship motion. At the same time, multi-platform based surveillance and combat mode is gaining more and more interests in recent ...
Li Ning, Wang Ling, Zhang Gong
doaj   +1 more source

An ISAR target motion estimation algorithm based on a differential semblance criterion

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This study presents a novel approach for improving rotational motion estimation in multistatic Inverse Synthetic Aperture Radar (ISAR) imaging through a Differential Semblance Optimization (DSO) criterion. By reducing discrepancies across images from multiple transmitter–receiver pairs, our method enables precise yaw rotation estimation and produces ...
D. P. Huxley, F. M. Watson, W. R. B. Lionheart   +2 more
wiley   +1 more source

Imaging of High-Speed Aerial Targets With ISAR Installed on a Moving Vessel

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
An inverse synthetic aperture radar (ISAR) technique is proposed to acquire high-resolution steady images of high-speed aerial target with radar installed on a moving vessel.
Dau-Ming Wu, Jean-Fu Kiang
doaj   +1 more source