Results 71 to 80 of about 71,530 (301)

Come from away: Reconstructing a long‐range migratory flight of spruce budworm moths to Newfoundland, Canada Venues de loin : reconstitution d'un vol migratoire de longue distance de tordeuses des bourgeons de l'épinette vers Terre‐Neuve, au Canada

Ecological Entomology, EarlyView.
Lagrangian atmospheric models were used in conjunction with ecophysiological factors to reconstruct the path and meteorological conditions of a long‐range migration flight of spruce budworm moths to Newfoundland, Canada. Moths travelled under high winds and warm temperatures that favoured their migratory flight until encountering cooler temperatures ...
Philippe Barnéoud, Jennie Pearce, Alain Malo, Jean‐Noël Candau   +3 more
wiley   +1 more source

Automated detection system of metro tunnel lining crack using dynamic snake convolution

Computer-Aided Civil and Infrastructure Engineering, EarlyView.
Abstract Inspecting defects in tunnel linings is a crucial part of tunnel maintenance work. Traditional tunnel inspection methods are generally inefficient, making it difficult to complete intensive inspection tasks and provide detailed characteristic data of cracks within the limited maintenance time. In this research, a deep learning–driven automatic
Zhutian Pan, Xuepeng Zhang, Bo Li, Yujing Jiang, Ningbo Li, Chengwei Mei, Hang Su, Yue Cai   +7 more
wiley   +1 more source

Identification of Parametric Underspread Linear Systems and Super-Resolution Radar

, 2010
Identification of time-varying linear systems, which introduce both time-shifts (delays) and frequency-shifts (Doppler-shifts), is a central task in many engineering applications.
Kfir Gedalyahu, Senior Member, Waheed U. Bajwa, Yonina C. Eldar   +3 more
core   +4 more sources

Leveraging Sparse Autoencoders to Reveal Interpretable Features in Geophysical Models

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 4, December 2025.
Abstract Machine learning is an increasingly popular tool in the geosciences, offering new approaches to numerical weather prediction and complex data set analysis. However, as reliance on these techniques grows, pressing questions about model transparency, internal biases, and trust emerge.
Fraser King, Claire Pettersen, Derek Posselt, Sarah Ringerud, Yan Xie   +4 more
wiley   +1 more source

History of Doppler Radar Navigation

Navigation, 1993
This paper traces the history of the development and applications of Doppler radar navigation systems from their inception in the mid-1940s to the present. The early design concepts, problems, tribulations, and obstacles are discussed. With only noncoherent pulse radar transmitters available at that time, a unique technique of self-coherence had to be ...
openaire   +2 more sources

Polarimetric Doppler Weather Radar [PDF]

Eos, Transactions American Geophysical Union, 2002
Weather radar has been used by meteorologists throughout the world since the 1940s as a valuable remote sensing technology. A significant milestone was reached in the late 1980s when the first of a network of 158 Weather Surveillance Radar‐1988 Doppler (WSR‐88D) weather radars was installed in central Oklahoma.
openaire   +2 more sources

Radar detectability of light aircraft micro‐Doppler modulation

IET Radar, Sonar & Navigation
The critical role of specifying micro‐Doppler mode performance in the modelling and development of modern radar systems is investigated. The authors focus on the detection of micro‐Doppler modulation from light aircraft, analysing data from eight ...
Robert John Berndt, Mohammed Yunus Abdul Gaffar, Willem Andries Jacobus Nel, Daniel W. O’Hagan   +3 more
doaj   +1 more source

Application of Micro-Doppler Signatures for Estimation of Total Energy Expenditure in Humans for Walking/Running Activities

IEEE Access, 2016
We investigate the feasibility of estimating the total energy expenditure (TEE) of a human for walking/running activities with micro-Doppler signatures. Doppler radar can capture micro-Doppler signatures produced from limb motions when a human moves.
Youngwook Kim, Songita Choudhury, Hyoun-Joong Kong   +2 more
doaj   +1 more source

Direct Assimilation of Radar Reflectivity Data in Logarithmic Scale or Power Transform?

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract To cover its large dynamic range, radar reflectivity factors have historically been displayed and used on a logarithmic scale, that is, decibels of reflectivity (dBZ). Logarithmic reflectivity has also been used for data assimilation without being questioned or well validated.
Peng Liu, Guifu Zhang, Jacob T. Carlin, Jidong Gao   +3 more
wiley   +1 more source

Micro-Doppler Feature Extraction of Inverse Synthetic Aperture Imaging Laser Radar Using Singular-Spectrum Analysis

Sensors, 2018
Different from microwave radar, laser radar could be more sensitive to the micro-Doppler (m-D) effect due to its wave length. This limits the application of conventional methods, such as time–frequency based approach, since the processing needs a ...
Mingzhe Zhu, Xianda Zhou, Bo Zang, Baisheng Yang, Mengdao Xing   +4 more
doaj   +1 more source