Results 21 to 30 of about 233,915 (272)

Covariance function of Legendre polynomials for the modeling of Polled Nellore cattle growth in northern Brazil

Semina: Ciências Agrárias, 2019
This study aimed to compare random regression models fitted by Legendre orthogonal polynomials and determine which best fits changes in Nellore cattle growth parameters.
Diego Helcias Cavalcante, Severino Cavalcante Sousa Júnior, Luciano Pinheiro da Silva, Carlos Henrique Mendes Malhado, Raimundo Martins Filho, José Elivalto Guimarães Campêlo, Karina Rodrigues Santos   +6 more
doaj   +1 more source

A Unified Algorithm for the Sliding Spotlight and TOPS Modes Data Processing in Bistatic Configuration of the Geostationary Transmitter with LEO Receivers

Remote Sensing, 2022
This paper deals with the imaging problem for sliding spotlight (SS) and terrain observation by progressive scan (TOPS) modes in bistatic configuration of the geostationary (GEO) transmitter with a low earth orbit satellite (LEO) receiver, named GTLR ...
Feng Tian, Zhiyong Suo, Yuekun Wang, Zheng Lu, Zhen Wang, Zhenfang Li   +5 more
doaj   +1 more source

A Utility Based Approach to Energy Hedging [PDF]

, 2011
A key issue in the estimation of energy hedges is the hedgers' attitude towards risk which is encapsulated in the form of the hedgers' utility function.
Alexander, Arrow, Bernoulli, Bollerslev, Brandt, Brooks, Cabedo, Cecchetti, Chen, Cotter, Cotter, Danthine, deVille deGoyet, Ederington, Engle, Ghysels, Giovannini, Henning, Jim Hanly, John Cotter, Kroner, Lien, Markowitz, Merton, Merton, Regnier, Townsend   +26 more
core   +3 more sources

Bayes Empirical Bayes Estimation for Natural Exponential Families with Quadratic Variance Functions

The Annals of Statistics, 1991
The prior distribution of the parameter of natural exponential families with quadratic variance is estimated by orthogonal polynomials. The proposed approach is based on combinations of Bayesian and nonparametric empirical Bayes methods.
Walter, G. G., Hamedani, G. G.
openaire   +3 more sources

Measuring the galaxy power spectrum with future redshift surveys [PDF]

, 1998
Precision measurements of the galaxy power spectrum P(k) require a data analysis pipeline that is both fast enough to be computationally feasible and accurate enough to take full advantage of high-quality data.
Ballinger B., Baugh C. M., Bond J. R., Cole S., Fisher K. B., Fisher R. A., Hamilton A. J. S., Hamilton A. J. S., Hamilton A. J. S., Heavens A. F., Kaiser N., Peacock J. A., Peacock J. A., Peacock J. A., Tadros H., White M., White S. D. M.   +16 more
core   +3 more sources

Surrogate modeling approximation using a mixture of experts based on EM joint estimation [PDF]

, 2010
An automatic method to combine several local surrogate models is presented. This method is intended to build accurate and smooth approximation of discontinuous functions that are to be used in structural optimization problems.
Bartoli, Nathalie, Bettebghor, Dimitri, Grihon, Stéphane, Morlier, Joseph, Samuelides, Manuel   +4 more
core   +3 more sources

Variance exchange process: overcoming the problem of singular information matrices in quadratic three−variable response designs

Journal of Innovative Applied Mathematics and Computational Sciences
Many a time, in a variance exchange process looking for D-optimal designs, the initial designs of all quadratic components of three-variable response polynomials produce non-invertible information matrices.
Okim Ikpan, Felix Nwobi
doaj   +1 more source

Temporal moments of a tracer pulse in a perfectly parallel flow system [PDF]

, 2002
Perfectly parallel groundwater transport models partition water flow into isolated one-dimensional stream tubes which maintain total spatial correlation of all properties in the direction of flow.
Bardsley, W. Earl
core   +2 more sources

Natural Exponential Families with Quadratic Variance Functions

The Annals of Statistics, 1982
The normal, Poisson, gamma, binomial, and negative binomial distributions are univariate natural exponential families with quadratic variance functions (the variance is at most a quadratic function of the mean). Only one other such family exists. Much theory is unified for these six natural exponential families by appeal to their quadratic variance ...
openaire   +2 more sources

Bayes estimators of log-normal means with finite quadratic expected loss [PDF]

, 2011
The log-normal distribution is a popular model in biostatistics as in many other fields of statistics. Bayesian inference on the mean and median of the distribution is problematic because, for many popular choices of the prior for variance (on the log ...
Fabrizi, Enrico, Trivisano, Carlo
core   +1 more source