Results 21 to 30 of about 596,644 (247)

A Comprehensive Method of Ambiguity Suppression for Constellation of Geostationary and Low Earth Orbit SAR

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
ConGalSAR is a novel SAR constellation that has an outstanding performance of revisit and economy. In the system, with the MirrorSAR technology, one geostationary illuminator and several economical low earth orbit transponders work together to achieve a ...
Peng Xiao, Wei Guo, Youming Wu, Bo Liu
doaj   +1 more source

LEO-Based Satellite Constellation for Moving Target Detection

open access: yesRemote Sensing, 2022
With the rapid development of cooperative detection technology, target fusion detection with regard of LEO satellites can be realized by means of their diverse observation configurations.
Chongdi Duan   +3 more
doaj   +1 more source

Ambiguity, ambiguity aversion and the coverage of uncertain risks : the case of the insurer [PDF]

open access: yes, 2011
Ambiguity aversion is defined as an aversion to any mean-preserving spread in the probability space. Using the Smooth Ambiguity Model proposed by Klibanoff, Marinacci and Mukerji (2005), we show that ambiguity aversion results in a reduction in the ...
Chelwa, Grieve
core   +1 more source

Ambiguity and communication [PDF]

open access: yes, 2009
The ambiguity of a nondeterministic finite automaton (NFA) N for input size n is the maximal number of accepting computations of N for an input of size n.
Hromkovič, Juraj   +3 more
core   +1 more source

Investment under ambiguity with the best and worst in mind [PDF]

open access: yes, 2011
Recent literature on optimal investment has stressed the difference between the impact of risk and the impact of ambiguity - also called Knightian uncertainty - on investors' decisions.
David Schröder, Schröder, David
core   +1 more source

Overview of Techniques for Improving High-resolution Spaceborne SAR Imaging and Image Quality

open access: yesLeida xuebao, 2019
As an important tool for acquiring remote sensing information, Synthetic Aperture Radar (SAR) has various modes, including high-resolution wide-swath, multi-angle information acquisition, high temporal observation, and three-dimensional topographic ...
LI Chunsheng, YU Ze, CHEN Jie
doaj   +1 more source

False‐alarm suppression with random forest by exploiting ambiguity features of targets

open access: yesElectronics Letters, 2022
Suppressing false alarms without impacting detection rate is an essential issue for search radars. Traditional threshold detection methods identify true targets by simply comparing the energy of target candidates with a threshold.
Zhifei Wang, Junpeng Yu, Yuhao Yang
doaj   +1 more source

Waveform Design and Signal Processing Method of a Multifunctional Integrated System Based on a Frequency Diverse Array

open access: yesLeida xuebao, 2022
A Frequency Diverse Array (FDA), developed innovatively based on phased array radar, can obtain an angle-range-time-dependent multidimensional transmit beampattern by modulating frequencies across different transmit antenna elements, which considerably ...
Lan LAN   +5 more
doaj   +1 more source

Advances and Prospects in Synthetic Aperture Radar Waveform Design

open access: yesLeida xuebao
Radar systems acquire target information by transmitting waveforms, receiving echoes, and processing signals; thus, waveform performance is a critical determinant of radar system performance.
Guodong JIN   +5 more
doaj   +1 more source

Translating whole‐genome doubling into precision medicine in cancer

open access: yesMolecular Oncology, EarlyView.
Whole‐genome doubling creates a WGD‐positive tumor state characterized by persistent chromosomal instability, karyotypic diversification, and cellular stress. These same biological pressures drive aggressive tumor evolution while exposing therapeutic vulnerabilities, providing a rationale for WGD‐informed precision medicine. Whole‐genome doubling (WGD)
Sejung Lee, Junghyeok Lim, Jinhyuk Bhin
wiley   +1 more source

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