Results 61 to 70 of about 4,347 (213)

Estimation of Lightning Activity of Squall Lines by Different Lightning Parameterization Schemes in the Weather Research and Forecasting Model

Remote Sensing, 2023
Based on three-dimensional lightning data and an S-band Doppler radar, a strong relationship was identified between lightning activity and the radar volume of squall lines. A detailed analysis of the squall line investigates the relationship following an
Dongxia Liu, Han Yu, Chunfa Sun
doaj   +1 more source

Adapting Image‐Based Models for 1D Data via Spider Plot Transformation and Transfer Learning

Advanced Intelligent Systems, Volume 7, Issue 12, December 2025.
A novel method enables the use of pretrained image‐based neural networks for complex 1D data, including Raman and mid‐infrared spectra, electrocardiograms, and mass spectrometry. 2D spider plots with false‐color fill enable transfer lerning, therefore enhancing data augmentation and model explainability across diverse spectral and time series datasets.
Azadeh Mokari, Oleg Ryabchykov, Thomas Bocklitz   +2 more
wiley   +1 more source

Intra-pulse Modulation Recognition of LPI Radar Signals Based on Improved MobileNet [PDF]

Radioengineering
Addressing the challenge of feature extraction for Low Probability of Intercept (LPI) radar signals under low signal-to-noise ratio conditions, this study introduces a new method for intra-pulse modulation recognition of LPI radar signals based on an ...
J. Wu, X. Wang, Y. Zhou, B. Chen, W. Li, L. Zhang   +5 more
doaj  

Asteroid Models from Multiple Data Sources

, 2015
In the past decade, hundreds of asteroid shape models have been derived using the lightcurve inversion method. At the same time, a new framework of 3-D shape modeling based on the combined analysis of widely different data sources such as optical ...
Carry, B., Delbo, M., Durech, J., Kaasalainen, M., Viikinkoski, M.   +4 more
core   +1 more source

Information Content Based Optimal Radar Waveform Design: LPI’s Purpose [PDF]

Entropy, 2017
This paper presents a low probability of interception (LPI) radar waveform design method with a fixed average power constraint based on information theory. The Kullback–Leibler divergence (KLD) between the intercept signal and background noise is presented as a practical metric to evaluate the performance of the adversary intercept receiver in this ...
Jun Chen, Fei Wang, Jianjiang Zhou
openaire   +1 more source

Multiple‐input multiple‐output with frequency diverse array radar transmit beamforming design for low‐probability‐of‐intercept in cluttered environments

IET Signal Processing, 2022
Multiple‐input multiple‐output with frequency diverse array (FDA‐MIMO) radar has drawn great attention due to providing the range‐angle beampattern via designing the transmit beamforming matrix.
Panke Jiang, Pengcheng Gong, Yuntao Wu, Xiong Deng   +3 more
doaj   +1 more source

Was Einstein Right? Testing Relativity at the Centenary

, 2005
We review the experimental evidence for Einstein's special and general relativity. A variety of high precision null experiments verify the weak equivalence principle and local Lorentz invariance, while gravitational redshift and other clock experiments ...
Adelberger, Alväger, Baessler, Bailes, Barish, Bauch, Berti, Bertotti, Bize, Braginsky, Brecher, Brillet, Champeney, Chiaverini, Chupp, Ciufolini, Colladay, Colladay, Cutler, Damour, Drever, Esposito-Farèse, Eötvös, Farley, Fischer, Gabriel, Godone, Haugan, Hoyle, Hoyle, Hughes, Ives, Jacobson, Jaseja, Kostelecký, Kramer, Krisher, Lamoreaux, Lightman, Long, Long, Lyne, Marion, Martins, Mattingly, Michelson, Milani, Niebauer, Peik, Prestage, Prestage, Riis, Roll, Rossi, Shankland, Shapiro, Stairs, Talmadge, Thorne, Turneaure, Turyshev, Uzan, Vessot, Visser, Weisberg, Will, Will, Will, Will, Will, Williams, Williams   +71 more
core   +2 more sources

A NOVEL LPI METHOD OF RADAR'S ENERGY CONTROL

Progress In Electromagnetics Research C, 2012
A novel radar energy control strategy based on an improved Interacting Multiple Model Particle Filter (IMMPF) tracking method is presented in this paper. Firstly, the IMMPF tracking method is improved by increasing the weight of the particle which is close to the system state and updating the model probability of every particle.
Zhenkai Zhang, Jian-Jiang Zhou
openaire   +1 more source

Cognitive MIMO Frequency Diverse Array Radar with High LPI Performance

International Journal of Antennas and Propagation, 2016
Frequency diverse array (FDA) has its unique advantage in realizing low probability of intercept (LPI) technology for its dependent beam pattern. In this paper, we proposed a cognitive radar based on the frequency diverse array multiple-input multiple ...
Ling Huang, Kuandong Gao, Zhiming He, Jingye Cai   +3 more
doaj   +1 more source

A model of the vessel traffic process [PDF]

, 1990
A model of the total vessel traffic control process that includes the functioning of the human operator (HO) is presented. The vessel traffic services (VTSs) are modeled in their possible role of monitor, conflict detector, and advisor for the total ...
Hoogland, M., Hove, D. ten, Wewerinke, P.H.   +2 more
core   +3 more sources