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.
Darreres entrades:
2016-06-21
08:15
24 p, 294.5 KB A statistical learning based approach for parameter fine-tuning of metaheuristics / Calvet, Laura (Universitat Oberta de Catalunya) ; Juan, Angel A. (Universitat Oberta de Catalunya) ; Serrat, Carles (Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada I) ; Ries, Jana (University of Portsmouth. Portsmouth Business School)
Metaheuristics are approximation methods used to solve combinatorial optimization problems. Their performance usually depends on a set of parameters that need to be adjusted. The selectionof appropriate parameter values causes a loss of efficiency, as it requires time, and advanced analytical and problem-specific skills. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 201-224 (Articles)  
 Accés restringit a la UAB
2016-06-21
08:15
24 p, 260.6 KB Compound distributions motivated by linear failure rate / Gitifar, Narjes (Amirkabir University of Technology (Teheran, Iran)) ; Rezaei, Sadegh (Amirkabir University of Technology (Teheran, Iran)) ; Nadarajah, Saralees (University of Manchester)
Motivated by three failure data sets (lifetime of patients, failure time of hard drives and failure timeof a product), we introduce three different three-parameter distributions, study basic mathematical properties, address estimation by the method of maximum likelihood and investigate finite sample performance of the estimators. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 177-200 (Articles)  
 Accés restringit a la UAB
2016-06-21
08:15
24 p, 1.2 MB Transmuted geometric distribution with applications in modeling and regression analysis of count data / Chakraborty, Subrata (Dibrugarh University (Índia). Department of Statistics) ; Bhati, Deepesh (Central University of Rajasthan (Índia). Department of Statistics)
A two-parameter transmuted geometric distribution is proposed as a new generalization of the geometric distribution by employing the quadratic transmutation techniques of Shaw and Buckley. The additional parameter plays the role of controlling the tail length. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 153-176 (Articles)  
 Accés restringit a la UAB
2016-06-21
08:15
14 p, 437.5 KB Exploring Bayesian models to evaluate control procedures for plant disease / Alvares, Danilo (Universidad de Valencia) ; Armero, Carmen (Universidad de Valencia) ; Forte, Anabel (Universidad de Valencia) ; Rubio, Luis (Instituto Valenciano de Investigaciones Agrarias)
Tigernut tubers are the main ingredient in the production of orxata in Valencia, a white soft sweet popular drink. In recent years, the appearance of black spots in the skin of tigernuts has led to important economic losses in orxata production because severely diseased tubers must be discarded. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 139-152 (Articles)  
 Accés restringit a la UAB
2016-06-21
08:15
26 p, 204.3 KB A goodness-of-fit test for the multivariate Poisson distribution / Novoa-Muñoz, Francisco (Universidad del Bío-Bío (Xile). Departamento de Estadística) ; Jiménez-Gamero, María Dolores (Universidad de Sevilla. Departamento de Estadística)
Bivariate count data arise in several different disciplines and the bivariate Poisson distribution is commonly used to model them. This paper proposes and studies a computationally convenient goodness-of-fit test for this distribution, which is based on an empirical counterpart of a system ofequations. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 113-138 (Articles)  
 Accés restringit a la UAB
2016-06-21
08:15
24 p, 1.2 MB Point and interval estimation for the logistic distribution based on record data / Asgharzadeh, Akbar (University of Mazandaran (Babolsar, Iran). Department of Statistics) ; Valiollahi, Reza (Semnan University (Iran). Department of Mathematics, Statistics and Computer Science) ; Abdi, Mousa (Higher Education Complex of Bam. Department of Mathematics and Soft Computing)
In this paper, based on record data from the two-parameter logistic distribution, the maximum likelihood and Bayes estimators for the two unknown parameters are derived. The maximum likelihood estimators and Bayes estimators can not be obtained in explicit forms. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 89-112 (Articles)  
 Accés restringit a la UAB
2016-06-21
08:15
34 p, 293.5 KB A test for normality based on the empirical distribution function / Torabi, Hamzeh (Yazd University (Iran). Statistics Department) ; Montazeri, Narges H. (Yazd University (Iran). Statistics Department) ; Grané, Aurea (Universidad Carlos III de Madrid. Departamento de Estadística)
In this paper, a goodness-of-fit test for normality based on the comparison of the theoretical and empirical distributions is proposed. Critical values are obtained via Monte Carlo for several sample sizes and different significance levels. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 55-88 (Articles)  
 Accés restringit a la UAB
2016-06-21
08:15
24 p, 284.7 KB Two alternative estimation procedures for the negative binomial cure rate model with a latent activation scheme / Gallardo, Diego I. (Universidad de Antofagasta (Chile). Departamento de Matemáticas) ; Bolfarine, Heleno (Universidade de São Paulo. Departamento de Estatística)
In this paper two alternative estimation procedures based on the EM algorithm are proposed forthe flexible negative binomial cure rate model with a latent activation scheme. The Weibull modelas well as the log-normal and gamma distributions are also considered for the time-to-event datafor the non-destroyed cells. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 31-54 (Articles)  
 Accés restringit a la UAB
2016-06-21
08:14
28 p, 816.7 KB The relevance of multi-country input-output tables in measuring emissions trade balance of countries : the case of Spain / Sanz, Teresa (Universidad de Sevilla. Departamento de Análisis Económico y Economía Política) ; Yñiguez, Rocío (Universidad de Sevilla. Departamento de Análisis Económico y Economía Política) ; Rueda-Cantuche, José Manuel (European Commission, Joint Research Centre. Institute for Prospective and Technological Studies)
As part of national accounts, input-output tables are becoming crucial statistical tools to study theeconomic, social and environmental impacts of globalization and international trade. In particular,global input-output tables extend the national dimension to the international dimension by relatingindividual countries’ input-output tables among each other, thus providing an opportunity to bal-ance the global economy as a whole. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 3-30 (Articles)  
 Accés restringit a la UAB
2015-12-23
08:06
28 p, 230.5 KB Multinomial logistic estimation in dual frame surveys / Molina, David (Universidad de Granada. Departamento de Estadística) ; Rueda, Maria del Mar (Universidad de Granada. Departamento de Estadística) ; Arcos, Antonio (Universidad de Granada. Departamento de Estadística) ; Ranalli, Maria Giovanna (Università di Perugia. Department of Political Sciences)
We consider estimation techniques from dual frame surveys in the case of estimation of proportions when the variable of interest has multinomial outcomes. We propose to describe the joint distribution of the class indicators by a multinomial logistic model. [...]
2015
SORT : statistics and operations research transactions, Vol. 39 Núm. 2 (July-December 2015) , p. 309-336 (Articles)  
 Accés restringit a la UAB