SORT : Statistics and Operations Research Transactions
SORT (ISSN 1696-2281 / ISSN electrònic 2013-8830) és una publicació semestral d'àmbit internacional coeditada per l'Idescat i quatre universitats catalanes (Universitat Politècnica de Catalunya, Universitat de Barcelona, Universitat Autònoma de Barcelona i Universitat de Girona) i amb la col•laboració de la Regió Espanyola de la Societat Internacional de Biometria. Publicada íntegrament en anglès (amb resums en català), promou la publicació d'articles originals d'estadística aplicada i metodologia estadística, investigació operativa, estadística oficial i biometria, així com la recensió de llibres i altres publicacions en aquests àmbits. SORT es publica des del 2003 i representa la tercera sèrie de Qüestiió (Quaderns d'Estadística i Investigació Operativa), publicada per l'Idescat des del 1992.
Estadístiques d'ús Els més consultats
Darreres entrades:
2021-03-25
18:51
2 p, 70.2 KB Editor's report / Guillén, Montserrat (Universitat de Barcelona. Departament d'Econometria)
2010
SORT : statistics and operations research transactions, Vol. 34, Núm. 1 (January-June 2010)  
2021-03-25
18:51
1 p, 22.4 KB Editor's report / Guillén, Montserrat (Universitat de Barcelona. Departament d'Econometria)
2012
SORT : statistics and operations research transactions, Vol. 36, Núm. 1 (January-June 2012)  
2021-03-25
18:50
1 p, 18.5 KB Foreword / Cuadras, Carles M. (Universitat de Barcelona. Departament d'Estadística)
2003
SORT : statistics and operations research transactions, Vol. 27, Núm. 1 (January-June 2003)  
2020-12-24
04:46
22 p, 459.3 KB Modelling multivariate, overdispersed count data with correlated and non-normal heterogeneity effects / Kazemi, Iraj (University of Isfahan (Iran). Department of Statistics) ; Hassanzadeh, Fatemeh (University of Khansar (Iran). Department of Statistics)
Mixed Poisson models are most relevant to the analysis of longitudinal count data in various disciplines. A conventional specification of such models relies on the normality of unobserved heterogeneity effects. [...]
2020 - 10.2436/20.8080.02.105
SORT : statistics and operations research transactions, Vol. 44 Núm. 2 (July-December 2020) , p. 335-356 (Articles)  
2020-12-24
04:46
24 p, 263.5 KB Why simheuristics? : Benefits, limitations, and best practices when combining metaheuristics with simulation / Chica, Manuel (Universidad de Granada) ; Juan, Ángel A (Universitat Oberta de Catalunya. Internet Interdisciplinary Institute (IN3)) ; Bayliss, Christopher (Universitat Oberta de Catalunya. Internet Interdisciplinary Institute (IN3)) ; Cordón, Oscar (Universidad de Granada) ; Kelton, W. David (University of Cincinnati. Department of Operations)
Many decision-making processes in our society involve NP-hard optimization problems. The largescale, dynamism, and uncertainty of these problems constrain the potential use of stand-alone optimization methods. [...]
2020 - 10.2436/20.8080.02.104
SORT : statistics and operations research transactions, Vol. 44 Núm. 2 (July-December 2020) , p. 311-334 (Articles)  
2020-12-24
04:46
26 p, 4.2 MB A simheuristic algorithm for time-dependent waste collection management with stochastic travel times / Gruler, Aljoscha (Universitat Oberta de Catalunya. Internet Interdisciplinary Institute (IN3)) ; Pérez-Navarro, Antoni (Universitat Oberta de Catalunya. Internet Interdisciplinary Institute (IN3)) ; Calvet Liñán, Laura (Universitat Oberta de Catalunya. Internet Interdisciplinary Institute (IN3)) ; Juan, Ángel A (Universitat Oberta de Catalunya. Internet Interdisciplinary Institute (IN3))
A major operational task in city logistics is related to waste collection. Due to large problem sizes and numerous constraints, the optimization of real-life waste collection problems on a daily basis requires the use of metaheuristic solving frameworks to generate near-optimal collection routes in low computation times. [...]
2020 - 10.2436/20.8080.02.103
SORT : statistics and operations research transactions, Vol. 44 Núm. 2 (July-December 2020) , p. 285-310 (Articles)  
2020-12-24
04:46
20 p, 452.1 KB Discrete generalized half-normal distribution and its applications in quantile regression / Gallardo, Diego I. (Universidad de Atacama, Copiapó (Xile). Departamento de Matemática) ; Gómez-Déniz, Emilio (Universidad de Las Palmas de Gran Canaria. Departamento de Métodos Cuantitativos en Economía y Gestión) ; Gómez, Héctor W. (Universidad de Antofagasta (Xile). Departamento de Matemáticas)
A new discrete two-parameter distribution is introduced by discretizing a generalized half-normal distribution. The model is useful for fitting overdispersed as well as underdispersed data. The failure function can be decreasing, bathtub shaped or increasing. [...]
2020 - 10.2436/20.8080.02.102
SORT : statistics and operations research transactions, Vol. 44 Núm. 2 (July-December 2020) , p. 265-284 (Articles)  
2020-12-24
04:46
42 p, 541.7 KB Independent increments in group sequential tests : a review / Kim, KyungMann (University of Wisconsin-Madison. Department of Biostatistics and Medical Informatics) ; Tsiatis, Anastasios A. (North Carolina State University. Department of Statistics)
In order to apply group sequential methods for interim analysis for early stopping in clinical trials, the joint distribution of test statistics over time has to be known. Often the distribution is multivariate normal or asymptotically so, and an application of group sequential methods requires multivariate integration to determine the group sequential boundaries. [...]
2020 - 10.2436/20.8080.02.101
SORT : statistics and operations research transactions, Vol. 44 Núm. 2 (July-December 2020) , p. 223-264 (Invited article)  
2020-06-27
05:07
20 p, 216.0 KB On interpretations of tests and effect sizes in regression models with a compositional predictor / Coenders Gallart, Germà (Universitat de Girona. Departament d'Economia) ; Pawlowsky-Glahn, Vera (Universitat de Girona. Departament d'Informàtica, Matemàtica Aplicada i Estadística)
Compositional data analysis is concerned with the relative importance of positive variables, expressed through their log-ratios. The literature has proposed a range of manners to compute log-ratios, some of whose interrelationships have never been reported when used as explanatory variables in regression models. [...]
2020 - 10.2436/20.8080.02.100
SORT : statistics and operations research transactions, Vol. 44 Núm. 1 (January-June 2020) , p. 201-220 (Articles)  
2020-06-27
05:07
30 p, 262.9 KB Bayesian structured antedependence model proposals for longitudinal data / Castillo-Carreno, Edwin (Universidad Nacional de Colombia. Departamento de Estadística) ; Cepeda-Cuervo, Edilberto (Universidad Nacional de Colombia. Departamento de Estadística) ; Núñez-Antón, Vicente. (Universidad del País Vasco. Departamento de Economía Aplicada III (Econometría y Estadística))
An important problem in Statistics is the study of longitudinal data taking into account the effect of other explanatory variables, such as treatments and time and, simultaneously, the incorporation into the model of the time dependence between observations on the same individual. [...]
2020 - 10.2436/20.8080.02.99
SORT : statistics and operations research transactions, Vol. 44 Núm. 1 (January-June 2020) , p. 171-200 (Articles)