نتایج جستجو برای: score function

تعداد نتایج: 1406445  

Journal: :International Journal of Computational Intelligence Systems 2015

2004
Samareh Samadi Massoud Babaie-Zadeh Christian Jutten Kambiz Nayebi

In this paper, an adaptive algorithm for blind source separation in linear instantaneous mixtures is proposed, and it is shown to be the optimum version of the EASI algorithm. The algorithm is based on minimization of mutual information of outputs. This minimization is done using adaptive estimation of a recently proposed non-parametric “gradient” for mutual information.

2016
Claudia Caudai Emanuele Salerno Monica Zoppè Anna Tonazzini

Based on experimental techniques of the type Chromosome Conformation Capture (3c), several methods have been proposed in the literature to estimate the structure of the nuclear dna in homogeneous populations of cells. Many of these methods transform contact frequencies into Euclidean distances between pairs of chromatin fragments, and then reconstruct the structure by solving a distance-to-geom...

2007

We discuss parameter estimation for discretely observed, ergodic diffusion processes where the diffusion coefficient does not depend on the parameter. We propose using an approximation of the continuous-time score function as an estimating function. The estimating function can be expressed in simple terms through the drift and the diffusion coefficient and is thus easy to calculate. Simulation ...

2007
Anil K. Bera

The standard Lagrange multiplier test for heteroskedasticity was originally developed assuming normality of the disturbance term see Godfrey (1978b), and Breush and Pagan (1979)]. Therefore, the resulting test depends heavily on the normality assumption. Koenker (1981) suggests a studentized form which is robust to nonnormality. This approach seems to be limited because of the unavailability of...

2014
M. EL-Sayed Waheed Osama Abdo Mohamed M. E. Abd El-aziz Ezzat G. Bakhoum

We propose an entirely novel family of score functions for blind signal separation BSS , based on the family of mixture generalized gamma density which includes generalized gamma, Weilbull, gamma, and Laplace and Gaussian probability density functions. To blindly extract the independent source signals, we resort to the FastICA approach, whilst to adaptively estimate the parameters of such score...

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