Results 41 to 50 of about 1,161 (185)

LPI Radar Waveform Recognition Based on Multi-Resolution Deep Feature Fusion

IEEE Access, 2021
Deep neural networks are used as effective methods for the Low Probability of Intercept (LPI) radar waveform recognition. However, existing models' performance degrades seriously at low Signal-to-Noise Ratios (SNRs) because the effective features ...
Xue Ni, Huali Wang, Fan Meng, Jing Hu, Changkai Tong   +4 more
doaj   +1 more source

Information and affective valence influence judgments of complexity, liking and understanding

British Journal of Psychology, EarlyView.
Abstract Visual complexity is a key factor in perceptual and evaluative judgments. People's representation of visual complexity is constructed from quantitative and structural image features, but it is also influenced by familiarity and expertise. We examined how people represent visual complexity and its impact on perception and evaluation, focusing ...
Xiaolei Sun, Jiajia Che, Marcos Nadal, Helmut Leder   +3 more
wiley   +1 more source

Radar Selection Method Based on an Improved Information Filter in the LPI Radar Network

International Journal of Antennas and Propagation, 2018
In order to save the radar resources and obtain the better low probability intercept ability in the network, a novel radar selection method for target tracking based on improved interacting multiple model information filtering (IMM-IF) is presented ...
Zhenkai Zhang, Bing Zhang, Zhibin Xie, Yi Yang   +3 more
doaj   +1 more source

Global distribution of aquatic animal telemetry effort reveals geographic biases and opportunities for more inclusive tracking studies

Conservation Science and Practice, EarlyView.
Despite broad global distribution of aquatic telemetry studies, important biogeographic regions remain poorly investigated. The most important variables correlated with the distribution of telemetry studies were political stability, conservation funding, number of scientific documents, and English as a first language.
S. T. Kessel, M. Auger‐Méthé, A. P. Barbosa Martins, S. J. Cooke, A. T. Fisk, A. L. Haley, M. R. Heupel, N. V. Klinard, J. K. Matley, M. L. Piczak, J. A. Robichaud, N. E. Hussey   +11 more
wiley   +1 more source

Persistence without prosperity at the upper range margin: Elevation, microhabitat buffering and biotic pressure in a range‐expanding spider

Ecological Entomology, EarlyView.
Anthropogenic linear features facilitate high‐elevation colonization. Parasitoid pressure declines markedly with elevation. Cocoon damage increases despite reduced parasitism at high elevation. Abstract The upper elevational range limits of thermophilic arthropods reflect constraints on population persistence rather than simple presence.
Zdeněk Vacek, Stanislav Korenko, Petr Heneberg   +2 more
wiley   +1 more source

Power and Waveform Resource Allocation Method of LPI Netted Radar for Target Search and Tracking

IET Radar, Sonar & Navigation
A joint power and waveform resource allocation algorithm is proposed for netted radar integrated search and tracking tasks with low probability of intercept.
Longhao Xie, Wenxing Ren, Ziyang Cheng, Ming Li, Huiyong Li   +4 more
doaj   +1 more source

Radar sensor using low probability of interception SS-FH signals

IEEE Aerospace and Electronic Systems Magazine, 2000
One of the best known weakness of radar sensors in defense and security applications is the necessity to radiate a signal, which can be detected by the target, so being possible (easy in fact) that the target is alerted about the presence of a radar before the radar is alerted about the presence of a target.
Burgos García, Mateo, Sanmartin Jara, Juan, Pérez Martínez, Félix, Retamosa, Juan   +3 more
openaire   +2 more sources

Linking eBird data with high spatiotemporal remote sensing products to estimate occupancy of bird populations across the island of Ireland

Ibis, EarlyView.
The vast increase in biodiversity data generated through citizen science initiatives, alongside a growing suite of remote sensing products and advanced modelling tools, has opened new avenues for rapidly, accurately and efficiently monitoring species trends to inform conservation, management and policy.
Ramiro D. Crego, Solène Gobet, John Kennedy, Brian Burke, Andrew Lynch, Dick Coombes, Sinéad Cummins, Lesley Lewis   +7 more
wiley   +1 more source

A Deep Reinforcement Learning Method with a Low Intercept Probability in a Netted Synthetic Aperture Radar

Remote Sensing
A deep reinforcement learning (DRL)-based power allocation method is proposed to achieve a low probability of intercept (LPI) in a netted synthetic aperture radar (SAR).
Longhao Xie, Ziyang Cheng, Ming Li, Huiyong Li   +3 more
doaj   +1 more source

LPI Optimization Framework for Target Tracking in Radar Network Architectures Using Information-Theoretic Criteria

International Journal of Antennas and Propagation, 2014
Widely distributed radar network architectures can provide significant performance improvement for target detection and localization. For a fixed radar network, the achievable target detection performance may go beyond a predetermined threshold with full
Chenguang Shi, Fei Wang, Mathini Sellathurai, Jianjiang Zhou   +3 more
doaj   +1 more source