Acta Universitatis Lodziensis. Folia Oeconomica: Recent submissions
Now showing items 2441-2460 of 4530
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Comparison of Accuracy of Spectral Clustering and Cluster Ensembles based on Co-Occurrence Matrix
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)High accuracy of the results is very important task in any grouping problem (clustering). It determines effectiveness of the decisions based on them. Therefore in the literature there are proposed methods and solutions ... -
Modification of Talavera Method of Variable Selection in Cluster Analysis
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Talavera has proposed a method of variable selection in cluster analysis for data sets in which only variables measured on nominal scale are present. He examined the method on a couple of data sets basing his assessment ... -
On Model Selection in Some Regularized Linear Regression Methods
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)A dynamic development of various regularization formulas in linear models has been observed recently. Penalizing the values of coefficients affects decreasing of the variance (shrinking coefficients to zero) and feature ... -
Testing Differences between Populations with Eigenvectors
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Testing differences between multivariate populations is one of a crucial problems in statistical investigations. The most known – MANOVA tests being parametric ones need to fulfill the assumptions about the conformity ... -
Bayesian Statistical Tests for Proportion for Independent and Dependent Sampling
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)As a result of the use of the Bayesian statistical tests, the decision of the acceptance of the hypothesis for which the posterior risk is lower, is made. The risk depends on the prior parameter’s distribution, the loss ... -
Some Remarks on the Symmetry Kernel Test
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The paper presents chosen statistical tests used to verify the hypothesis of the symmetry of random variable’s distribution. Detailed analysis of the symmetry kernel test is made. The properties of the regarded symmetry ... -
Classification of Large Data Sets. Comparison of Performance of Chosen Algorithms
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Researchers analyzing large (> 100,000 objects) data sets with the methods of cluster analysis often face the problem of computational complexity of algorithms, that sometimes makes it impossible to analyze in an acceptable ... -
On Parameter Estimation of Some Longitudinal Model
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The problem of modeling longitudinal profiles is considered assuming that the population and elements’ affiliation to subpopulations may change in time. Some longitudinal model which is a special case of the general ... -
Clustering of Symbolic Data with Application of Ensemble Approach
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Ensemble approaches based on aggregated models have been applied with success to discrimination and regression tasks. Nevertheless this approach can be applied to cluster analysis tasks. Many articles have proved that, ... -
Samuel Dickstein (1851–1939)
(Wydawnictwo Uniwersytetu Łódzkiego, 2013) -
Optimality of Spring Balance Weighing Designs
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)In this paper, the problem of existence of optimal spring balance weighing designs is discussed. Two optimality criterions are compared and the appropriate optimality conditions are presented. -
The Influence of Choice of Methods of Checking on Total Quality Control Costs
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Acceptance sampling is commonly used in factories, because it decreases the probability of giving defective batch to the customer. From two distinguished ways of acceptance sampling, more frequently in practice is used ... -
Construction of E–Optimal Spring Balance Weighing Designs for Even Number of Objects
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The problem of the construction of spring balance weighing designs satisfying the criterion of E-optimality is discussed. The incidence matrices of partially incomplete block designs are used to construction of the regular ... -
The Significance of Prior Information in Bayesian Parametric Survival Models
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The Bayesian approach gives the possibility of using in the research additional information that is external to the sample. The primary objective of this paper is to analyse the impact of the prior information on the ... -
Properties of Transformation Quantile Regression Model
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)We present in this paper a few important direction on research using quantile regression. We start from some motivation for this method of regression. Secondly we present some main areas of application this method. Finally ... -
Zachowania menedżerów z małych i średnich firm w procesie przedsiębiorczości technologicznej
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Article shows typical behavior of managers from small and medium sized enterprises in the process of transferring and implementing technological innovations, developed in universities and research centers. Small and ... -
Wprowadzenie (Prof. zw. dr hab. Uniwersytetu Łódzkiego Czesław Sikorski – sylwetka naukowca i nauczyciela akademickiego)
(Wydawnictwo Uniwersytetu Łódzkiego, 2013) -
Uwarunkowania wdrażania koncepcji społecznej odpowiedzialności biznesu (CSR) w małych i średnich przedsiębiorstwach
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)The issue of corporate social responsibility, is no longer considered only as a philosophy which is based on altruism and philanthropy. CSR has become a way for company management, a concept that in the long run contribute ... -
Innovativeness of Small and Medium Enterprises as a Means to Increase their Market Competitiveness
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Konkurencyjność małych i średnich przedsiębiorstw jest ściśle powiązana z możliwością wprowadzania w nich innowacji. Zagadnienia te są częścią omawianej w artykule analizy opartej na badaniach ankietowych oraz rozmowach, ... -
Innovation Capacity of Enterprises – Selected Issues
(Wydawnictwo Uniwersytetu Łódzkiego, 2013)Artykuł poświęcony jest przeglądowi literatury naukowej dotyczącej pojęć i obszarów oraz specyfiki zdolności innowacyjnej przedsiębiorstw. W drugim punkcie artykułu omówiono pojęcie oraz rodzaje zdolności innowacyjnej ...