arXiv
(509,308 recursos)
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Mostrando recursos 21 - 40 de 110
21.
Controlling for individual heterogeneity in longitudinal models, with
applications to student achievement - Lockwood, J. R.; McCaffrey, Daniel F.
Random effects or mixed models
approaches, which treat individual heterogeneity as part of the model error
term and use generalized least squares to estimate model parameters, are often
criticized because correlation between unobserved individual effects and other
model variables can lead to biased and inconsistent parameter estimates.
22.
Sensitivity of principal Hessian direction analysis - Prendergast, Luke A.; Smith, Jodie A.
Our results also provide evidence that outliers in
the traditional sense may or may not be highly influential in practice.
25.
Spline Single-Index Prediction Model - Wang, Li; Yang, Lijian
For the past two decades, single-index model, a special case of projection
pursuit regression, has proven to be an efficient way of coping with the high
dimensional problem in nonparametric regression.
26.
On generalized entropy measures and pathways - Mathai, A. M.; Haubold, H. J.
Then generalized entropies are introduced, all
of which give generalizations to Shannon entropy.
27.
Solutions of fractional reaction-diffusion equations in terms of the
H-function - Haubold, H. J.; Mathai, A. M.; Saxena, R. K.
This paper deals with the investigation of the solution of an unified
fractional reaction-diffusion equation associated with the Caputo derivative as
the time-derivative and Riesz-Feller fractional derivative as the
space-derivative.
30.
A new approach to mutual information - Hiai, F.; Petz, D.
A new expression as a certain asymptotic limit via "discrete micro-states" of
permutations is provided to the mutual information of both continuous and
discrete random variables.
32.
Metropolis algorithm and equienergy sampling for two mean field spin
systems - Federico, Bassetti; Fabrizio, Leisen
In both this examples the naive choice of
proposal chain gives rise, for some parameters, to a slowly mixing Metropolis
chain, that is a chain whose spectral gap decreases exponentially fast (in the
dimension $N$ of the problem).
33.
Algebraic geometry of Gaussian Bayesian networks - Sullivant, Seth
Conditional independence models in the Gaussian case are algebraic varieties
in the cone of positive definite covariance matrices.
34.
When the Cramer-Rao Inequality provides no information - Miller, Steven J.
We investigate a one-parameter family of probability densities (related to
the Pareto distribution, which describes many natural phenomena) where the
Cramer-Rao inequality provides no information.
35.
Gibbs fragmentation trees - McCullagh, Peter; Pitman, Jim; Winkel, Matthias
In the binary case, we identify
the most general Gibbs type fragmentation tree with Aldous's beta-splitting
model, which has an extended parameter range $\beta>-2$ with respect to the
${\rm Beta}(\beta+1,\beta+1)$ probability distributions on which it is based.
38.
A Dynamic Algorithm for Blind Separation of Convolutive Sound Mixtures - Liu, Jie; Xin, Jack; Qi, Yingyong
We study an efficient dynamic blind source separation algorithm of
convolutive sound mixtures based on updating statistical information in the
frequency domain, andminimizing the support of time domain demixing filters by
a weighted least square method.
39.
U-max-Statistics - Lao, Wei; Mayer, Michael
Hoeffding introduced a large class of unbiased estimators called
U-statistics, defined as the average value of a real-valued k-variate function
h calculated at all possible sets of k points from a random sample.
21.
