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    Wyświetlanie 1-12 z 12
    Tytuł:
    Modele hierarchiczne w prognozowaniu zmiennych o wysokiej częstotliwości obserwowania w warunkach braku pełnej informacji
    Hierarchical models in forecasting of the high-frequency variables in the conditions of lack of full information
    Autorzy:
    Szmuksta-Zawadzka, Maria
    Zawadzki, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/425235.pdf
    Data publikacji:
    2014
    Wydawca:
    Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
    Tematy:
    high-frequency data
    hierarchical models
    incomplete time series
    Opis:
    The paper presents a procedure of application of regular hierarchical models in forecasting missing data in high-frequency time series with cyclical fluctuations. Annual, weekly and daily cycles of seasonal fluctuation have additive character. Separately regular hierarchical models have been built for even length cycles.Theoretical considerations are illustrated with an empirical example.
    Źródło:
    Econometrics. Ekonometria. Advances in Applied Data Analytics; 2014, 4(46); 72-84
    1507-3866
    Pojawia się w:
    Econometrics. Ekonometria. Advances in Applied Data Analytics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Linking EPC models – an alternative approach
    Autorzy:
    Szczęśniak, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/360759.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    hierarchical EPC models
    business process modelling
    Opis:
    Even though the literature is abundant in numerous studies concerning syntactic and semantic principles of the EPC model development, one may still have certain doubts when linking such models with one another. This article primarily addresses the principles of creating EPC models, particularly those relevant from the perspective of linking them, identified based on the literature research. What follows the said analysis is a proposal of an alternative concept which may be adopted in this respect. The author has discussed the cases in which models must be subject to specific modifications in order for the linking solution proposed to be applicable.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 34 (106); 79-84
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Limitations in detailing of EPC models
    Autorzy:
    Szczęśniak, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/358980.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    hierarchical EPC models
    business process modelling
    hierarchical functions
    Opis:
    EPC models provide a subject widely discussed in the literature. The principles applicable, while creating them have been elaborated upon in numerous publications. An analysis of the existing principles indicates certain inconsistencies as far as the creation of hierarchical models is concerned. The problem of combining equivalent EPC models using process interfaces has been discussed in the author’s previous publication. This paper continues to elaborate upon the problems previously raised, pertaining to EPC model linking by means of hierarchical functions. It addresses principles significant from the perspective of creating and linking such models using the aforementioned approach. Specific questionable situations have been described and individual solutions proposed to enable avoiding them.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 39 (111); 151-155
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Political Legitimacy and Normative Disorientation in European Liberal Democracies
    Autorzy:
    Bieliński, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/1790795.pdf
    Data publikacji:
    2017-09-14
    Wydawca:
    Polskie Towarzystwo Socjologiczne
    Tematy:
    legitimacy
    normative disorientation
    liberal democracy
    hierarchical linear models
    Opis:
    Legitimacy is one of the fundamental topics of the social and political sciences, as well as a valid issue in contemporary Western societies. Legitimacy is based on the existence of a common standard for evaluating social and political systems. If such a standard is absent, legitimacy is impossible by definition (Beetham 1991). The research question of this article is: to what extent is the level of a political system’s legitimacy explained by the effect of normative disorientation? Data from round 5 of the European Social Survey is analyzed by multilevel linear regression models in order to verify hypotheses about the strength and direction of the correlation between political legitimacy and normative disorientation. Analysis showed that normative disorientation is negatively correlated with the level of political legitimacy.
    Źródło:
    Polish Sociological Review; 2017, 199, 3; 267-285
    1231-1413
    2657-4276
    Pojawia się w:
    Polish Sociological Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hierarchical Log-linear Models for Contingency Tables
    Hierarchiczne modele logarytmiczno-liniowe dla tablic kontyngencji
    Autorzy:
    Brzezińska, Justyna
    Powiązania:
    https://bibliotekanauki.pl/articles/906850.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    log-linear models
    hierarchical log-linear models
    AIC
    BIC
    Opis:
    Log-linear models are widely used for qualitative data in multidimensional contingency tables. Hierarchical log-linear models are models that include all lower-order terms composed from variables contained in a higher-order model term. The starting point is a saturated model, then homogenous associations, conditional independence and complete independence. There are several statistics that help to choose the best model. The first is the likelihood ratio approach, next is AIC and BIC information criteria. In R software there is loglm() function in MASS library and glm in stats library. The first approach is presented in this paper
    Źródło:
    Acta Universitatis Lodziensis. Folia Oeconomica; 2012, 269
    0208-6018
    2353-7663
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Oeconomica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie modelowania wielopoziomowego w analizie jakości życia
    An application of multilevel modelling in subjective well-being studies
    Autorzy:
    Suchecka, Jadwiga
    Łaszkiewicz, Edyta
    Powiązania:
    https://bibliotekanauki.pl/articles/587316.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    Dekompozycja wariancji
    Efekty losowe
    Europejski Sondaż Społeczny
    Modele hierarchiczne
    European Social Survey
    Hierarchical models
    Random effects
    Variance decomposition
    Opis:
    Modele wielopoziomowe umożliwiają jednoczesną analizę procesu na kilku poziomach agregacji danych. W związku z tym formułowane na ich podstawie wnioski mogą rozszerzać rozumienie natury relacji między czynnikami o charakterze mikro i mezo (lub makro) a zmienną wynikową. Celem badania jest zademonstrowanie możliwości wykorzystania modelowania wielopoziomowego w badaniach jakości życia. W badaniu skorzystano z ogólnodostępnych danych mikro, pochodzących z trzech fal badania (2010, 2012, 2014) Europejskiego Sondażu Społecznego. Uzyskane wyniki potwierdzają wnioski z dotychczasowych badań, wskazując, iż poziom subiektywnie deklarowanej satysfakcji życiowej determinowany jest profilem społeczno-ekonomicznym i demograficznym jednostki. Wykorzystanie modelowania wielopoziomowego pozwoliło stwierdzić, iż poziom zaufania do ludzi i władz, rozpatrywany na poziomie regionalnym, oddziałuje silniej na zmiany poziomu zadowolenia z życia niż zaufanie deklarowane na poziomie mikro.
    Multilevel models allow for the simultaneous analysis of process on the several levels of data aggregation. Therefore, the conclusions formulated on them can broaden the understanding of the nature of the relationship between micro and mezo (or macro) factors and the outcome variable. The aim of the study is to demonstrate the potential for multi-level modelling in the quality of life studies. In this study, we used publicly available micro data from three waves of the European Social Survey (2010, 2012, 2014). Our results confirm the conclusions of previous researches, indicating that the level of subjectively declared life satisfaction is determined by the socio-economic and demographic profile of the individual. An application of the multilevel models enables us to conclude that the level of trust in people and authorities at the regional level affects life satisfaction stronger than the trust expressed at the micro level.
    Źródło:
    Studia Ekonomiczne; 2017, 344; 133-144
    2083-8611
    Pojawia się w:
    Studia Ekonomiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applying Hierarchical Loglinear Models to Nonfatal Underground Coal Mine Accidents for Safety Management
    Autorzy:
    Onder, M.
    Onder, S.
    Adiguzel, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/90586.pdf
    Data publikacji:
    2014
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    occupational injuries
    accident analysis
    hierarchical loglinear models
    zarządzanie bezpieczeństwem
    urazy
    analiza wypadków
    Opis:
    Underground mining is considered to be one of the most dangerous industries and mining remains the most hazardous occupation. Categorical analysis of accident records may present valuable information for preventing accidents. In this study, hierarchical loglinear analysis was applied to occupational injuries that occurred in an underground coal mine. The main factors affecting the accidents were defined as occupation, area, reason, accident time and part of body affected. By considering subfactors of the main factors, multiway contingency tables were prepared and, thus, the probabilities that might affect nonfatal injuries were investigated. At the end of the study, important accident risk factors and job groups with a high probability of being exposed to those risk factors were determined. This article presents important information on decreasing the number accidents in underground coal mines.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2014, 20, 2; 239-248
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of HLM to data with multilevel structure
    Autorzy:
    Valente, Vítor
    Oliveira, Teresa
    Powiązania:
    https://bibliotekanauki.pl/articles/729938.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    hierarchical linear model
    multilevel model
    cross-classification models
    academic achievement
    Opis:
    Many data sets analyzed in human and social sciences have a multilevel or hierarchical structure. By hierarchy we mean that units of a certain level (also referred micro units) are grouped into, or nested within, higher level (or macro) units. In these cases, the units within a cluster tend to be more different than units from other clusters, i.e., they are correlated. Thus, unlike in the classical setting where there exists a single source of variation between observational units, the heterogeneity between clusters introduces an additional source of variation and complicates the analysis.
    Collecting data on Educational Research often does not follow the principles of simple random sample, suspected by classical regression, but rather a sample by nested clusters. Selected to students and also the contextual units to which they belong such as classes, courses, schools, neighborhoods or regions, and so forth.
    Using classical regression bias is produced in the typical error of measurement and an increased likelihood of committing errors of inference. The hierarchical linear or multilevel models are most suitable because they consider the hierarchical relationships and also provide estimates on the contextual variability of regression coefficients. In practice, often the data structures are not hierarchical, are more complex structures such as cross-classification (level 2 or macro). For example, students (level 1 or micro) to attend different courses at a school while in other schools there are students who attend the same courses. Two examples of application to academic achievement of students are presented. First, a model of cross-classification of level 2 is used. Second, a hierarchical model of two levels (students and schools) is presented, taking into account the different areas of science - scientific-humanistic courses and technology courses.
    Źródło:
    Discussiones Mathematicae Probability and Statistics; 2011, 31, 1-2; 87-101
    1509-9423
    Pojawia się w:
    Discussiones Mathematicae Probability and Statistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methodological aspects of qualitative-quantitative analysis of decision-making processes
    Autorzy:
    Gawlik, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/406734.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    qualitative-quantitative analysis
    hierarchical decision-making
    neural-network models
    management
    manufacturing processes
    Opis:
    The paper aims at recognizing the possibilities and perspectives of application of qualitativequantitative research methodology in the field of economics, with a special focus on production engineering management processes. The main goal of the research is to define the methods that would extend the research apparatus of economists and managers by tools that allow the inclusion of qualitative determinants into quantitative analysis. Such approach is justified by qualitative character of many determinants of economic occurrences. At the same time quantitative approach seems to be predominant in production engineering management, although methods of transposition of qualitative decision criteria can be found in literature. Nevertheless, international economics and management could profit from a mixed methodology, incorporating both types of determinants into joint decision-making models. The research methodology consists of literature review and own analysis of applicability of mixed qualitative-quantitative methods for managerial decision-making. The expected outcome of the research is to find which methods should be applied to include qualitativequantitative analysis into multicriteria decision-making models in the fields of economics, with a special regard to production engineering management.
    Źródło:
    Management and Production Engineering Review; 2016, 7, 2; 3-11
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Comparison of Small Area Estimation Methods for Poverty Mapping
    Autorzy:
    Guadarrama, María
    Molina, Isabel
    Rao, J. N. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/465671.pdf
    Data publikacji:
    2016
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    area level model
    non-linear parameters
    empirical best estimator
    hierarchical Bayes
    poverty mapping
    unit level models
    Opis:
    We review main small area estimation methods for the estimation of general nonlinear parameters focusing on FGT family of poverty indicators introduced by Foster, Greer and Thorbecke (1984). In particular, we consider direct estimation, the Fay-Herriot area level model (Fay and Herriot, 1979), the method of Elbers, Lanjouw and Lanjouw (2003) used by the World Bank, the empirical Best/Bayes (EB) method of Molina and Rao (2010) and its extension, the Census EB, and finally the hierarchical Bayes proposal of Molina, Nandram and Rao (2014). We put ourselves in the point of view of a practitioner and discuss, as objectively as possible, the benefits and drawbacks of each method, illustrating some of them through simulation studies.
    Źródło:
    Statistics in Transition new series; 2016, 17, 1; 41-66
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hierarchical Classification of Environmental Noise Sources Considering the Acoustic Signature of Vehicle Pass-Bys
    Autorzy:
    Valero, X.
    Alias, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/176616.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    acoustic signature
    environmental noise monitoring
    Gaussian mixture models
    hierarchical classification
    mel-frequency cepstral coefficients (MFCC)
    sound classification
    traffic noise
    vehicle pass-by
    Opis:
    This work is focused on the automatic recognition of environmental noise sources that affect humans’ health and quality of life, namely industrial, aircraft, railway and road traffic. However, the recognition of the latter, which have the largest influence on citizens’ daily lives, is still an open issue. Therefore, although considering all the aforementioned noise sources, this paper especially focuses on improving the recognition of road noise events by taking advantage of the perceived noise differences along the road vehicle pass-by (which may be divided into different phases: approaching, passing and receding). To that effect, a hierarchical classification scheme that considers these phases independently has been implemented. The proposed classification scheme yields an averaged classification accuracy of 92.5%, which is, in absolute terms, 3% higher than the baseline (a traditional flat classification scheme without hierarchical structure). In particular, it outperforms the baseline in the classification of light and heavy vehicles, yielding a classification accuracy 7% and 4% higher, respectively. Finally, listening tests are performed to compare the system performance with human recognition ability. The results reveal that, although an expert human listener can achieve higher recognition accuracy than the proposed system, the latter outperforms the non-trained listener in 10% in average.
    Źródło:
    Archives of Acoustics; 2012, 37, 4; 423-434
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie struktur grafowych do analiz bibliometrycznych i webometrycznych Modele i metody
    The application of graph structures to the bibliometrical and webometrical analyses Models and methods
    Autorzy:
    Kamińska, Anna Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/474418.pdf
    Data publikacji:
    2018
    Wydawca:
    Wydawnictwo Uniwersytetu Śląskiego
    Tematy:
    Bibliometria
    Gephi
    Grafy dynamiczne
    Grafy hierarchiczne
    Metody ewaluacji
    Modele ewaluacji
    Struktury grafowe
    Bibliometrics
    Dynamic graphs
    Graph structures
    Hierarchical graphs
    Methods of evaluation
    Models of evaluation
    Opis:
    W artykule przedstawiono możliwość wykorzystania koncepcji zaczerpniętych z teorii grafów oraz metod analizy sieci społecznościowych w zastosowaniach biblio- i webometrycznych. Chociaż metody analizowania struktur grafowych znane są w nauce od dłuższego czasu, to dopiero rozwój technologii pozwalających zastosować te metody w praktyce na dużych zbiorach danych spowodował ich upowszechnienie w różnych obszarach nauki, a nawet życia codziennego. Możliwości wykorzystania wspomnianych metod na gruncie biblio- i webometrii były sygnalizowane przez badaczy już w ubiegłym wieku, jednak w stosunkowo niewielu publikacjach, zwłaszcza krajowych, stosuje się te metody w praktyce. Dlatego w niniejszym opracowaniu omówione zostały ogólne koncepcje analiz i modeli agregacji danych bibliometrycznych, które mogą zostać zaadaptowane na potrzeby konkretnych badań. Rozważania te mają charakter generalny i niezależny od konkretnej platformy analitycznej, natomiast w końcowej części artykułu zaprezentowano przykład aplikacji Gephi, umożliwiającej implementację opisywanych koncepcji.
    The article presents the possibility to use the concept derived from the theory of graphs and methods of the social network analysis in bibliometrics and webometrics. Although the methods of the analysis of graph structures have been familiar to scholarship for a long time, it was the development of technologies which enable the application of these methods in practice in large collections of data that popularised them in many fields of science, and even of everyday life. Although the possibilities of the application of these methods in biblio- and webometrics were indicated by researchers even in the past century, there is a relatively small number of publications, especially released in this country, which put these methods to practice. Therefore in the present work the author presents the general concepts of the analyses and the models of aggregation of bibliometrical data, which may be adopted for the purposes of specific research. Although the considerations which are described are general and are independent of a specific analytical platform, the final part of the article presents an example of the Gephi application, which enables the implementation of the concepts in question.
    Źródło:
    Nowa Biblioteka. Usługi, Technologie Informacyjne i Media; 2018, 2(29); 47-63
    1505-4195
    2451-2575
    Pojawia się w:
    Nowa Biblioteka. Usługi, Technologie Informacyjne i Media
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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