نتایج جستجو برای: ambiguity function method

تعداد نتایج: 2689596  

2016
Qiyang Xiao Jian Li Zhiliang Bai Jiedi Sun Nan Zhou Zhoumo Zeng

In this study, a small leak detection method based on variational mode decomposition (VMD) and ambiguity correlation classification (ACC) is proposed. The signals acquired from sensors were decomposed using the VMD, and numerous components were obtained. According to the probability density function (PDF), an adaptive de-noising algorithm based on VMD is proposed for noise component processing ...

2007
Jakob V. Hansen Anders Krogh

The geometric opinion pool (GOP) ensemble method uses a multiplicative combination of predictors, and it is tailored to probability estimation in multi-class problems. This enables a decomposition of the KullbackLeibler entropy error function into an ambiguity term and an average error term. This can be used to estimate generalization error with a combination of cross-validation and estimation ...

Precise positioning in Real Time Kinematic (RTK) applications depends on the accurate resolution of the phase ambiguities. In RTK positioning, ambiguity parameters are highly correlated, especially when the positioning rate is high. Consequently, application of de-correlation techniques for the accurate resolution of ambiguities is inevitable. Phase ambiguity as positioning observations by the ...

2007
Malek G. M. Hussain

The classical theory of radar resolution is based on narrowband sinusoidal waveforms and cannot directly be applied to ultrawideband (UWB) impulse radar. The concept of a generalized ambiguity function, which is a two-dimensional autocorrelation function in the range-Doppler domain, was first introduced by Harmuth in 1981 as a convenient design tool for the performance analysis of carrier-free ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه امام رضا علیه السلام - دانشکده ادبیات و زبانهای خارجی 1392

cognitive studies of translation process have recently been awarded a great deal of attention. there exists a psychological angle to almost all translation activities. the present study, thus, deals with analysing the relationships between iranian prospective translators tolerance for ambiguity (ta) and their willingness to translate (wtt). the research was conducted as a mixed methods study, d...

1992

The radar ambiguity function represents the output of the matched filter, and it describes the interference caused by the range and/or Doppler shift of a target when compared to a reference target of equal RCS. The ambiguity function evaluated at is equal to the matched filter output that is matched perfectly to the signal reflected from the target of interest. In other words, returns from the ...

Journal: :IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 2022

In this paper, an azimuth ambiguity suppression method based on area imaging and detection is proposed, which suitable for various modes such as strip, spot multi-channel mode. The basic idea of to focus the image each single-look complex (SLC) synthetic aperture radar (SAR) through reversible signal processing method, then strong targets in focused are detected eliminated. Finally, real target...

This study aimed to assess the associations of meta-cognitive beliefs, cognitive failure, and ambiguity tolerance with cognitive emotion regulation in substance-dependent women. The present study was a descriptive-correlational research. The statistical population of this study included all substance-dependent women in addiction treatment camp and addiction treatment clinics of the city of Tabr...

2010
Liliana Borcea Thomas Callaghan George Papanicolaou

We introduce from first principles a synthetic aperture radar (SAR) imaging and target motion estimation method that is combined with compensation for radar platform trajectory perturbations. The main steps of the method are (a) segmentation of the data into properly calibrated small apertures, (b) preliminary motion estimation from the data using the Wigner transform and the ambiguity function...

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