Results 61 to 70 of about 2,464 (177)
Information-theoretic Physical Layer Security for Satellite Channels
, 2017 Shannon introduced the classic model of a cryptosystem in 1949, where Eve has access to an identical copy of the cyphertext that Alice sends to Bob. Shannon defined perfect secrecy to be the case when the mutual information between the plaintext and the ...
Hayashi, Masahito +1 more
core +1 more source
When should you terminate your own program? Bad Business: The JASORS Debacle [PDF]
, 2005 Acquisition Research Working paper ...
Dillard, John T.
core +3 more sources
Multiloitering Munition Cooperative Surrounding and Attack Method Based on Wolf Pack Algorithm
International Journal of Aerospace Engineering, Volume 2026, Issue 1, 2026.Aiming at the optimization problem of multiloitering munitions cooperatively surrounding moving targets, this paper proposes a cooperative surrounding and attack method based on the wolf pack algorithm (WPA). Firstly, the relative kinematics model between the munitions and the target is established, and the cooperative surrounding task flow is analyzed
Zetian Zhang +4 more
wiley +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 +3 more
doaj +1 more source
Row Crops and the U.S. Agricultural Trade Deficit: Recent Trends and Policy Issues
Applied Economic Perspectives and Policy, Volume 47, Issue 5, Page 1759-1773, December 2025.ABSTRACT Row crops such as soybeans, corn, wheat, and cotton are the backbone of the U.S. farm sector, accounting for around $60 billion of exports in 2023. While U.S. row crop exports remain robust, growing concerns over the rising U.S. agricultural trade deficit underscore the need to appraise the ongoing market and policy dynamics affecting the ...
William Ridley, Stephen Devadoss
wiley +1 more source
Radar signal recognition exploiting information geometry and support vector machine
IET Signal Processing, 2023 Aiming at the recognition of low‐probability‐of‐intercept (LPI) radar signals, a support vector machine (SVM)‐based algorithm is proposed, where the information geometry theory is utilised to optimise the kernel function of the SVM.
Yuqing Cheng, Muran Guo, Limin Guo
doaj +1 more source
Ecography, Volume 2025, Issue 12, December 2025.Human activities have significantly modified habitats, resulting in a global biodiversity crisis. In this study, we leveraged the first national‐scale biodiversity survey based on airborne environmental DNA, comparing the effects of three human pressure indices increasing in complexity and scope – a binary urban–rural index, an index integrating land ...
Orianne Tournayre +6 more
wiley +1 more source
Ecology and Evolution, Volume 15, Issue 11, November 2025.Urban gardens can play a vital role in supporting pollinator diversity and aiding ecosystem health amidst global declines in pollinators. This study analyzed plant–pollinator interactions in Mid‐Atlantic (USA) urban gardens using multispecies occupancy models, focusing on two native plants: Liatris spicata and Pycnanthemum muticum .
Nicholas J. Ruppel +6 more
wiley +1 more source
LPI Sequences Optimization Method against Summation Detector Based on FFT Filter Bank
Remote SensingWaveform design is a crucial factor in electronic surveillance (ES) systems. In this paper, we introduce an algorithm that designs a low probability of intercept (LPI) radar waveform. Our approach directly minimizes the detection probability of summation
Qiang Liu +4 more
doaj +1 more source
Analysis of low probability of intercept (LPI) radar signals using cyclostationary processing
, 2002 LPI radar is a class of radar systems possessing certain performance characteristics that make them nearly undetectable by today's digital intercept receivers. This presents a significant tactical problem in the battle space. To detect these types of radar, new digital receivers that use sophisticated signal processing techniques are required.
openaire +2 more sources