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Tytuł:
Characteristics of bivariate binomial distribution
Autorzy:
Wagner, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/657952.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
bivariate zero-one distribution
bivariate binomial distribution
cumulative distribution function
characterictic function
moments
Opis:
W pracy podano jeden z wielu możliwych sposobów określenia dwuwymiarowego rozkładu dwumianowego. Inne możliwości są wymieniane w pracy Johnsona i in. (1997, s. 31–92). Mają one związek z rozkładem wielomianowym. Podejście proponowane w pracy jest naturalnym rozszerzeniem jednowymiarowego rozkładu zero-jedynkowego i rozkładu dwumianowego. W przypadku dwuwymiarowym proponowana w pracy postać funkcji charakterystycznej w formie rozpisanej i wektorowej pozwoliła na wyprowadzenie wzorów na momenty zwykle i mieszane. Dwuwymiarowy rozkład dwumianowy przy liczbie prób n dążących do nieskończoności przechodzi w dwuwymiarowy rozkład Poissona. a przy pewnych n, p 1 , p 2 przechodzi w graniczny dwuwymiarowy rozkład normalny. Dwuwymiarowy rozkład dwumianowy daje się rozszerzyć na przypadek wielowymiarowy (Johnson i in. 1997. s. 105–113).
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2011, 255
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Beta transmuted Lomax distribution with applications
Autorzy:
Hurairah, Ahmed
Alabid, Abdelhakim
Powiązania:
https://bibliotekanauki.pl/articles/1363592.pdf
Data publikacji:
2020-06-05
Wydawca:
Główny Urząd Statystyczny
Tematy:
Lomax distribution
beta Lomax distribution
transmuted distribution
maximum likelihood estimation
Opis:
In this paper we propose and test a composite generalizer of the Lomax distribution .The genesis of the beta distribution and transmuted map is used to develop the so-called beta transmuted Lomax (BTL) distribution. The properties of the distribution are discussed and explicit expressions are derived for the moments, mean deviations, quantiles, distribution of order statistics and reliability. The maximum likelihood method is used for estimating the model parameters, and the finite sample performance of the estimators is assessed by simulation. Finally, the authors demonstrate the usefulness of the new distribution in analysing positive data.
Źródło:
Statistics in Transition new series; 2020, 21, 2; 13-34
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classification of distribution networks
Klasyfikacja sieci dystrybucyjnych
Autorzy:
Straka, M.
Malindzak, D.
Powiązania:
https://bibliotekanauki.pl/articles/343837.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
dystrybucja
sieć dystrybucji
przestrzeń dystrybucji
elementy sieci dystrybucji
distribution
distribution network
space of distribution
elements of distribution network
Opis:
Distribution networks are possible to create from the final number elements. Topology of distribution networks as one of strategic decision of the design logistics system is depending on the quantitative factors, business position on the market, type of products, volume of production, location business and warehouses, from status of firm activities, from the number and its capacity of the distribution resources and other.
Tworzenie sieci dystrybucyjnych należy do procesów złożonych z wielu czynności. Decyzje dotyczące topologii sieci dystrybucji należą do strategicznych decyzji na etapie projektowania systemu logistycznego i zależą od czynników ilościowych, pozycji firmy na rynku, rodzaju dystrybuowanych produktów, wielkości produkcji, lokalizacji firmy i magazynów, od formy działalności firmy, od liczby i zdolności zasobów dystrybucji.
Źródło:
Total Logistic Management; 2010, 3; 79-86
1689-5959
Pojawia się w:
Total Logistic Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New polynomial exponential distribution: properties and applications
Autorzy:
Beghriche, Abdelfateh
Zeghdoudi, Halim
Raman, Vinoth
Chouia, Sarra
Powiązania:
https://bibliotekanauki.pl/articles/2108330.pdf
Data publikacji:
2022-09-14
Wydawca:
Główny Urząd Statystyczny
Tematy:
exponential distribution
Xgamma distribution
Lindley distribution
quantile function stochastic ordering
maximum-likelihood estimation
XLindley distribution
Opis:
The study describes the general concept of the XLindley distribution. Forms of density and hazard rate functions are investigated. Moreover, precise formulations for several numerical properties of distributions are derived. Extreme order statistics are established using stochastic ordering, the moment method, the maximum likelihood estimation, entropies and the limiting distribution. We demonstrate the new family's adaptability by applying it to a variety of real-world datasets.
Źródło:
Statistics in Transition new series; 2022, 23, 3; 95-112
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sujatha Distribution and its Applications
Autorzy:
Shanker, Rama
Powiązania:
https://bibliotekanauki.pl/articles/465746.pdf
Data publikacji:
2016
Wydawca:
Główny Urząd Statystyczny
Tematy:
lifetime distributions
Akash distribution
Shanker distribution
Lindley distribution
mathematical and statistical properties
estimation of parameter
goodness of fit
Opis:
In this paper a new one-parameter lifetime distribution named “Sujatha Distribution” with an increasing hazard rate for modelling lifetime data has been suggested. Its first four moments about origin and moments about mean have been obtained and expressions for coefficient of variation, skewness, kurtosis and index of dispersion have been given. Various mathematical and statistical properties of the proposed distribution including its hazard rate function, mean residual life function, stochastic ordering, mean deviations, Bonferroni and Lorenz curves, and stress-strength reliability have been discussed. Estimation of its parameter has been discussed using the method of maximum likelihood and the method of moments. The applications and goodness of fit of the distribution have been discussed with three real lifetime data sets and the fit has been compared with one-parameter lifetime distributions including Akash, Shanker, Lindley and exponential distributions.
Źródło:
Statistics in Transition new series; 2016, 17, 3; 391-410
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Managing the company’s distribution system
Autorzy:
Kabus, Judyta
Nowakowska-Grunt, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1179493.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
company
distribution
distribution management
logistics
Opis:
The effective distribution system plays an important role in a company, it means chances for success for a company and for maximized profit. Current company practices demonstrate that company’s distribution system management is conducted separately, with means of the departments of logistics and marketing. This article pertains to the company’s distribution system. The essence and functions of distribution are defined in the beginning. Then, distribution channels used in a company are described in detail. Finally, distribution strategies are described in detail.
Źródło:
World Scientific News; 2017, 78; 277-283
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Logistyka dystrybucji w przedsiębiorstwach górniczych
Distribution logistics in mining companies
Autorzy:
Włodarczyk, E.
Rybak, A.
Powiązania:
https://bibliotekanauki.pl/articles/113678.pdf
Data publikacji:
2017
Wydawca:
STE GROUP
Tematy:
górnictwo
dystrybucja
kanały dystrybucji
logistyka dystrybucji
mining
distribution
distribution channels
distribution logistics
Opis:
W artykule opisano polski rynek węgla kamiennego oraz przedstawiono organizację dystrybucji węgla w przedsiębiorstwach górniczych. Analizy dokonano na przykładzie Katowickiego Holdingu Węglowego. Jej wyniki pozwoliły na wskazanie sposobów kierowania dystrybucją umożliwiających przedsiębiorstwom przetrwanie na konkurencyjnym rynku.
The paper describes Polish coal market and presents the organization of the coal distribution in mining companies. Presented analysis was conducted on the example of Katowicki Holding Węglowy. The results allowed the authors to identify methods of distribution that will enable companies to survive in a competitive market.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2017, 6, 2; 324-333
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bayesian estimation of a geometric distribution using informative priors based on a Type-I censoring scheme
Autorzy:
Akhtar, Nadeem
Khan, Sajjad Ahamad
Amin, Muhammad
Khan, Akbar Ali
Ali, Amjad
Manzoor, Sadaf
Powiązania:
https://bibliotekanauki.pl/articles/20311948.pdf
Data publikacji:
2023-06-13
Wydawca:
Główny Urząd Statystyczny
Tematy:
prior distribution
posterior distribution
geometric distribution
beta distribution
Kumraswamy distribution
Opis:
In this paper, the geometric distribution parameter is estimated under a type-I censoring scheme by means of the Bayesian estimation approach. The Beta and Kumaraswamy informative priors, as well as five loss functions are used for this purpose. Expressions of Bayes estimators and Bayes risks are derived under the Squared Error Loss Function (SELF), the Quadratic Loss Function (QLF), the Precautionary Loss Function (PLF), the Simple Asymmetric Precautionary Loss Function (SAPLF), and the DeGroot Loss Function (DLF) using the two aforementioned priors. The prior densities are obtained through prior predictive distributions. Simulation studies are carried out to make comparisons using Bayes risks. Finally, a real-life data example is used to verify the model’s efficiency.
Źródło:
Statistics in Transition new series; 2023, 24, 3; 257-263
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Managing distribution processes in the selected sales Network
Autorzy:
Nowakowska, Anita
Powiązania:
https://bibliotekanauki.pl/articles/1070886.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
distribution
distribution logistics
logistics management
network
sales network
Opis:
Distribution logistics plays an important role in the proper functioning of the company. It is particularly important in manufacturing companies that sell their products in their showrooms. Many of these types of companies see the opportunity to improve the efficiency of their operations in properly organized activities in the field of distribution logistics. However, this requires proper management of distribution processes. A choice should be made between direct and indirect distribution, in the case of the latter, also specify the number of intermediary links and select the sales agents accordingly. With this in mind, the considerations taken up in the article were devoted to the problems of managing distribution processes in the sales network on the example of a selected enterprise.
Źródło:
World Scientific News; 2019, 123; 234-245
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czy kurtoza mierzy spiczastość rozkładu?
Does kurtosis measure the peakedness of a distribution?
Autorzy:
Kochański, Błażej
Powiązania:
https://bibliotekanauki.pl/articles/2148483.pdf
Data publikacji:
2022-11-30
Wydawca:
Główny Urząd Statystyczny
Tematy:
kurtoza
eksces
rozkład leptokurtyczny
rozkład platykurtyczny
spłaszczenie rozkładu
wysmukłość rozkładu
spiczastość rozkładu
kurtosis
excess
leptokurtic distribution
platykurtic distribution
flat-toppedness of a distribution
slenderness of a distribution
peakedness of a distribution
Opis:
Celem artykułu jest przedstawienie i uzasadnienie interpretacji klasycznego współczynnika kurtozy jako miary grubości ogonów oraz zaproponowanie modyfikacji treści dydaktycznych w tym zakresie. W wielu polskich podręcznikach akademickich podaje się, że współczynnik kurtozy (lub ekscesu) mierzy „wysmukłość”, „spiczastość” lub „spłaszczenie” rozkładu. Taka interpretacja jest nieprawidłowa. Kurtoza mierzy bowiem w istocie stopień rozproszenia wartości cechy w ogonach rozkładu lub – innymi słowy – intensywność wartości skrajnych. W artykule wskazano, dlaczego starsze interpretacje, mówiące o kształcie wierzchołka krzywej gęstości, są niewłaściwe. Zaprezentowano przykładowe leptokurtyczne rozkłady spłaszczone i platykurtyczne rozkłady wysmukłe. Na podstawie danych z Diagnozy Społecznej z lat 2000–2015 wykazano, że w badaniach empirycznych wartość kurtozy wynika ze stopnia natężenia wartości odstających. Zaproponowano nowe sformułowania, które można wykorzystać w dydaktyce statystyki zamiast nieprawidłowych, stosowanych dotychczas.
The aim of the article is to present and justify the interpretation of the classical kurtosis as a measure of fat-tailedness and to propose modifications in the relevant didactic content. Many Polish academic textbooks describe kurtosis (or excess kurtosis) as a measure of the ‘slenderness’, ‘peakedness’ or ‘flat-toppedness’ of a distribution. This interpretation is incorrect. Kurtosis in fact measures the level of the dispersion of the values in the tails of the distribution or, in other words, the intensity of the extreme values. The article illustrates why the older interpretations which refer to the shape of the peak of the probability density function are incorrect. The study provides examples of leptokurtic flat-topped distributions and platykurtic peaked distributions. Using data from the 2000–2015 Social Diagnosis, the paper demonstrates that in empirical studies, the value of the kurtosis results from the level of the extremity of the outliers. New formulations are proposed which could replace the current, incorrect ones in statistical didactics.
Źródło:
Wiadomości Statystyczne. The Polish Statistician; 2022, 67, 11; 43-61
0043-518X
Pojawia się w:
Wiadomości Statystyczne. The Polish Statistician
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
USING THE STABLE DISTRIBUTION TO MONITOR A PROCESS, WHICH DISTRIBUTION IS UNKNOWN
Autorzy:
Chmielińska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/655800.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Control chart
stable distribution
Opis:
The control chart is a tool of statistical quality control, which is widely used in production. The fulfillment of its basic assumptions, guarantees flawless assessment of correctness of the monitored process. The purpose of this paper is to pay attention to the need to verify the assumptions of the used method and the effects of its unauthorized use, in case of not meeting its assumptions. In this paper a method that uses a family of stable distributions to estimate the unknown probability density of monitored diagnostic variable, is proposed. The estimated density function is the basis for determining the control limits.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2014, 3, 302
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Bayes estimators of the parameters of inflated modified power series distributions
Autorzy:
Murat, Małgorzata
Szynal, Dominik
Powiązania:
https://bibliotekanauki.pl/articles/729948.pdf
Data publikacji:
2000
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
posterior distributions
posterior moments
Bayes estimator
inflated distribution
generalized Pareto distribution
generalized Poisson distribution
generalized negative binomial distribution
lost games distribution
Opis:
In this paper, we study the class of inflated modified power series distributions (IMPSD) where inflation occurs at any of support points. This class includes among others the generalized Poisson,the generalized negative binomial and the lost games distributions. We derive the Bayes estimators of parameters for these distributions when a parameter of inflation is known. First, we take as the prior distribution the uniform, Beta and Gamma distribution. In the second part of this paper, the prior distribution is the generalized Pareto distribution.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2000, 20, 2; 189-209
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MLE for the γ-order Generalized Normal Distribution
Autorzy:
Kitsos, Christos
Vassiliadis, Vassilios
Toulias, Thomas
Powiązania:
https://bibliotekanauki.pl/articles/729734.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
γ-order Normal distribution
cumulative distribution
truncated distribution
hazard rate
Maximum likelihood estimation
Opis:
The introduced three parameter (position μ, scale ∑ and shape γ) multivariate generalized Normal distribution (γ-GND) is based on a strong theoretical background and emerged from Logarithmic Sobolev Inequalities. It includes a number of well known distributions such as the multivariate Uniform, Normal, Laplace and the degenerated Dirac distributions. In this paper, the cumulative distribution, the truncated distribution and the hazard rate of the γ-GND are presented. In addition, the Maximum Likelihood Estimation (MLE) method is discussed in both the univariate and multivariate cases and asymptotic results are presented.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2014, 34, 1-2; 143-158
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution management in company X
Zarządzanie procesem dystrybucji w przedsiębiorstwie "X"
Autorzy:
Wójcik-Mazur, A.
Wieczorek, K.
Powiązania:
https://bibliotekanauki.pl/articles/404962.pdf
Data publikacji:
2012
Wydawca:
Politechnika Częstochowska
Tematy:
zarządzanie logistyczne
dystrybucja
dystrybucja fizyczna
kanał dystrybucji
logistic management
distribution
physical distribution
distribution channel
Opis:
The subject of this publication is the problem of distribution management, exemplified by Company X. The process has been defined by analysing the conditions necessary to satisfy prospects' needs and create the market position of a business entity. The paper focuses on the basic features of distribution system and the character of distribution channels.The assessment of distribution management has been illustrated with an example of Company X. The subjects of interest are: the dynamics of order flow, the delivery readiness rate, and the percentage of specific complaints in the structure of complaints in total between 2009 and 2011. The Pareto chart made it possible to diagnose the main causes of the highest percentage of complaints. As a result of research, the key improvement areas have been identified, the main ones being the functioning of order processing system and completion of deliveries.
Przedmiotem rozważań w niniejszej publikacji jest problematyka zarządzania procesem dystrybucji analizowana z perspektywy przedsiębiorstwa "X". Proces ten zdefiniowano poprzez pryzmat zaspokajania potrzeb potencjalnych klientów oraz kreacji pozycji rynkowej podmiotu gospodarczego, koncentrując się na podstawowych cechach systemu dystrybucji oraz specyfice znaczących w tym aspekcie kanałów. Ocenę zarządzania procesem dystrybucji przedstawiono na przykładzie przedsiębiorstwa "X". Przedmiotem badań była analiza dynamiki liczby zamówień, wskaźnika gotowości dostawczej, jak również wskaźnika udziału poszczególnych grup reklamacji w strukturze reklamacji ogółem przeprowadzona dla okresu badawczego 2009-2011. Implementacja wykresu Pareto-Lorenza umożliwiła diagnozę głównych obszarów generujących największy procent reklamacji. W efekcie prowadzonych badań zdefiniowano kluczowe płaszczyzny wymagające modernizacji w tym w szczególności funkcjonowanie systemu obsługi zamówień jak i trudności z zakresu fizycznego dostarczania produktów oraz kompletacji dostaw.
Źródło:
Polish Journal of Management Studies; 2012, 6; 196-205
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance of Distribution Channels Shown on the Example of Company Specialising in Meat Processing
Autorzy:
Rorat, Joanna Maria
Powiązania:
https://bibliotekanauki.pl/articles/504080.pdf
Data publikacji:
2016
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
distribution channels
effectiveness of distribution channels meat processing
minimization distribution costs
Opis:
As far as the rapid development of global marketing network is concerned , it is easy to notice that logistics is becoming increasingly important. The growing competition makes these networks more efficient. More and more opportunities to bring products to the customer disorganize sales network management. The analysis of the effectiveness of distribution channels allows a close examination of efficiency of how the company reaches its customers. It also supports decisions regarding the introduction of new, previously unused channels of distribution, or modification of the already in-use ones. The range of work included a manufacturer specializing in meat processing and production of meat products, distributed in southern Poland. Using the point-analytical method, the effectiveness of distribution channels used in the company was evaluated. As a result, it was possible to determine the performance of individual sales channels. There were three distribution channels: by-company, sponsored and networking. The most effective appeared to be the networking channel, which scored a total of 235 points. Given the greatest potential of distribution, this channel, in terms of the size of the batch supplied to markets, without doubt will continue to be one of the leading directions of development in the future of the company. In second place was the by-company channel with 195 points, while the sponsored channel was the least effective. However, as a conclusion from the information gathered from the company itself, each channel will be developed in the future, proportionally to their current rank.
Źródło:
Logistics and Transport; 2016, 29, 1; 19-24
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Symulacyjne badanie szybkości zbieżności rozkładu statystyk do rozkładu normalnego
Simulation analysis of convergence of sample mean distribution to normal distribution
Autorzy:
Wywiał, Janusz L.
Krzciuk, Małgorzata
Mierzwa, Michał
Powiązania:
https://bibliotekanauki.pl/articles/434108.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
sample mean distribution
normal distribution
convergence of sample mean distribution
Opis:
The paper discusses studentized sample mean distribution. The sample is from exponential distribution. On the basis of independent replications of the samples empirical distributions studentized mean was calculated. The distance between the empirical distributions and the standard normal distribution was measured by means well known as statistics of Kolmogorov. Under the appropriate sample sizes the degree of the difference between the empirical and theoretical distributions was evaluated. Moreover, the hypothesis on normality of the empirical distributions was tested by means of the Kolmogorov test.
Źródło:
Śląski Przegląd Statystyczny; 2013, 11(17); 201-208
1644-6739
Pojawia się w:
Śląski Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The distribution of Elatine macropoda Guss. [Elatinaceae]
Autorzy:
Popiela, A
Lysko, A.
Powiązania:
https://bibliotekanauki.pl/articles/56804.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
distribution
Elatine macropoda
Elatinaceae
vascular plant
distribution map
locality list
Opis:
Data on distribution of Elatine macropoda Guss. are given, listing distribution map and a list of localities. Disjunctive distribution pattern of the species within the Mediterranean region as well as distribution of other species of the section Elatinella Seub. and the genera suggests a long history of the range formation.
Źródło:
Acta Societatis Botanicorum Poloniae; 2010, 79, 1; 81-86
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical models for income distribution in the socio-economic systems
Autorzy:
Blagun, Ivan
Dmytryshyn, Lesya
Powiązania:
https://bibliotekanauki.pl/articles/419674.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
income distribution
agent-based approach
Laplace distribution
asymmetric Subbotin distribution
statistical model
socio-economic system
Opis:
The given article is devoted to agent-based approach used to the construction of income distribution models, at which the economic systems are designed as an aggregate of autonomous interactive agents. The considered models open a new way for the income distribution analysis, which manifests itself in the interaction between a large number of economic agents, which allows to set between the desired stationary distributions.
Źródło:
Nauki o Zarządzaniu; 2013, 3(16); 9-20
2080-6000
Pojawia się w:
Nauki o Zarządzaniu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Companies sustainable distribution
Zrównoważona dystrybucja przedsiębiorstw
Autorzy:
Trojanowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/250544.pdf
Data publikacji:
2013
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
zrównoważona dystrybucja przedsiębiorstw
zrównoważone kanały dystrybucji
companies sustainable distribution
sustainable distribution channels
Opis:
The article presents the importance of a sustainable distribution at companies. The paper discusses the concepts and definitions of the distribution in terms of the literature. It also points out the essence of sustainable distribution. The further part of the article presents streams of sustainable distribution channels. The final part of the paper includes a summary.
W artykule omówiono znaczenie zrównoważonej dystrybucji przedsiębiorstw. Zaprezentowano pojęcia i definicje dystrybucji w ujęciu literaturowym. Następnie wskazano na istotę zrównoważonej dystrybucji przedsiębiorstw. W dalszej części artykułu przedstawiono strumienie zrównoważonych kanałów dystrybucji. W końcowej części opracowania zamieszczono podsumowanie.
Źródło:
TTS Technika Transportu Szynowego; 2013, 10; 1049-1053, CD
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global approximations for the γ-order Lognormal distribution
Autorzy:
Toulias, Thomas
Powiązania:
https://bibliotekanauki.pl/articles/729844.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
cumulative distribution function
γ-order Lognormal distribution
global Padé approximation
Opis:
A generalized form of the usual Lognormal distribution, denoted with $_γ$, is introduced through the γ-order Normal distribution $_γ$, with its p.d.f. defined into (0,+∞). The study of the c.d.f. of $_γ$ is focused on a heuristic method that provides global approximations with two anchor points, at zero and at infinity. Also evaluations are provided while certain bounds are obtained.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2013, 33, 1-2; 99-110
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Beta Pareto Distribution
Autorzy:
Hurairah, Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/465778.pdf
Data publikacji:
2011
Wydawca:
Główny Urząd Statystyczny
Tematy:
Beta Pareto distribution
Kurtosis
Rényi entropy
Opis:
In this paper, we introduce a generalization—referred to as the beta Pareto distribution, generated from the logit of a beta random variable. We provide a comprehensive treatment of the mathematical properties of the beta Pareto distribution. We derive expressions for the kth moments of the distribution, variance, skewness, kurtosis, mean deviation about the mean, mean deviation about the median, Rényi entropy, Shannon entropy. We also discuss simulation issues, estimation of parameters by the methods of moments and maximum likelihood.
Źródło:
Statistics in Transition new series; 2011, 12, 1; 97-114
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the properties of the Generalized Normal Distribution
Autorzy:
Toulias, Thomas
Kitsos, Christos
Powiązania:
https://bibliotekanauki.pl/articles/729804.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
entropy type Fisher's information
Shannon entropy
Normal distribution
truncated distribution
Opis:
The target of this paper is to provide a critical review and to enlarge the theory related to the Generalized Normal Distributions (GND). This three term (position, scale shape) distribution is based in a strong theoretical background due to Logarithm Sobolev Inequalities. Moreover, the GND is the appropriate one to support the Generalized entropy type Fisher's information measure.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2014, 34, 1-2; 35-49
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multivariate negative binomial distributions generated by multivariate exponential distributions
Autorzy:
Kopociński, Bolesław
Powiązania:
https://bibliotekanauki.pl/articles/1338938.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
bivariate geometrical distribution
multivariate exponential distribution
multivariate negative binomial distribution
Opis:
We define a multivariate negative binomial distribution (MVNB) as a bivariate Poisson distribution function mixed with a multivariate exponential (MVE) distribution. We focus on the class of MVNB distributions generated by Marshall-Olkin MVE distributions. For simplicity of notation we analyze in detail the class of bivariate (BVNB) distributions. In applications the standard data from [2] and [7] and data concerning parasites of birds from [4] are used.
Źródło:
Applicationes Mathematicae; 1998-1999, 25, 4; 463-472
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of gas molecules by their temperatures
Autorzy:
Golovkin, Boris Georgievich
Powiązania:
https://bibliotekanauki.pl/articles/1030475.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Clapeyron equation
Maxwell distribution
distribution of molecules by temperatures
gas density
gas pressure
Opis:
A formula is derived for the distribution of gas molecules over their temperatures depending on the total temperature of the gas. Formulas are proposed for the distribution of velocities and kinetic energies of gas molecules depending on the pressure and density of the gas. It is shown that these formulas are equivalent to the formulas of the corresponding Maxwell distributions, which depend only on temperature. A formula is derived for the distribution of the mean free paths of gas molecules depending only on the gas density. An example of calculating the distribution of gas molecules by their temperatures is given.
Źródło:
World Scientific News; 2020, 144; 89-102
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Type II Topp-Leone Frechet distribution: properties and applications
Autorzy:
Shanker, Rama
Rahman, Umme Habibah
Powiązania:
https://bibliotekanauki.pl/articles/1917058.pdf
Data publikacji:
2021-12-08
Wydawca:
Główny Urząd Statystyczny
Tematy:
Frechet distribution
Topp-Leone distribution
reliability properties
applications
Opis:
The paper focuses on type II Topp-Leone Frechet distribution. Its properties including hazard rate function, reverse hazard rate function, Mills ratio, quantile function and order statistics have been studied. The maximum likelihood estimation used for estimating the parameters of the proposed distribution has been explained and expressions for the Fisher information matrix and confidence intervals have been provided. The paper discusses the applications of the distribution for modeling several datasets relating to temperature. Finally, the goodness of fit of the proposed distribution has been compared with that of the Frechet distribution.
Źródło:
Statistics in Transition new series; 2021, 22, 4; 139-152
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozkład naprężeń w odwadnianych osadach filtracyjnych
Stress distribution in dewatered filter cakes
Autorzy:
Składzień, J.
Szymków, J.
Powiązania:
https://bibliotekanauki.pl/articles/2071311.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
odwadnianie osadu filtracyjnego
rozkład wilgoci
rozkład odkształceń
rozkład naprężeń
filter cake dewatering
moisture distribution
strain distribution
stress distribution
Opis:
W pracy przedstawiono analizę procesu powstawania naprężeń w osadach filtracyjnych odwadnianych przez przedmuchiwanie powietrzem. Wewnątrz osadu powstaje nierównomierny rozkład nasycenia filtratem. W pracy przedstawiono mechanizm i model operacji odwadniania oraz wyjaśniono zjawisko powstawania nierównomiernego rozkładu naprężeń wewnątrz osadu. Model pozwala na wyznaczenie rozkładów odkształceń i naprężeń powstających wewnątrz osadu.
Study of stress formation in cakes dewatered by air blowing is presented in the paper. Inside a cake irregular saturation distribution is created during de-watering. The mechanism and model of dewatering process were described and phenomenon of irregular stress distribution was explained. The model enables the estimation of strain and stress distribution created inside a filter cake.
Źródło:
Inżynieria i Aparatura Chemiczna; 2010, 4; 70-71
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal load distribution estimation for fault location in electric power distribution systems
Autorzy:
Menchafou, Y.
Zahri, M.
Habibi, M.
El Markhi, H.
Powiązania:
https://bibliotekanauki.pl/articles/140980.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electric power distribution systems
fault location
fictive load distribution
load variation
Opis:
Accurate fault location in an electric power distribution system (EPDS) is important in maintaining system reliability. Diverse methods have been proposed in the past. These methods whither require measurements at each load point or use single-step loads compensation, which is hardly available in practical uses. In this paper, a simple technique to bypass the load problems is proposed. The method requires calculating an optimal load distribution using the total load seen from the substation (The rated power of distribution transformers) and the network topology. The optimal load distribution is used as a fictive distribution to replace the real unknown one in fault location (FL) algorithms. The effectiveness of the proposed technique is demonstrated using a mathematical formulation first, and next, by several simulations with a classic iterative fault location algorithm. The test results are obtained from the numerical simulation using the data of a distribution line recognized in the literature.
Źródło:
Archives of Electrical Engineering; 2017, 66, 1; 77-87
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution and ecology of Biatoridium monasteriense J. Lahm ex Korb in Poland
Autorzy:
Lubek, A.
Powiązania:
https://bibliotekanauki.pl/articles/57580.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
distribution
ecology
Biatoridium monasteriense
Polska
Bialowieza Forest
lichen
species distribution
Opis:
A new site of Biatoridium monasteriense was discovered during a lichenological investigation in Białowieża National Park. The paper presents information on the distribution of this species in Poland.
Źródło:
Acta Societatis Botanicorum Poloniae; 2012, 81, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of distribution and sales of low alcohol beverages in Poland
Autorzy:
Majchrzak-Lepczyk, Justyna
Szymczak, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/1833810.pdf
Data publikacji:
2020
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
distribution
distribution channels
sale techniques
logistics
innovations
Opis:
The struggle for the customer is symptomatic of the companies operating on contemporary markets. Developing new distribution channels and sales techniques is manifestation of the struggle. Dynamic market changes determine how vendors operate and induce them to implement innovation concepts in distribution, sales and logistics. These original solutions create new shopping modes and possibilities. The purpose of the paper is to present new solutions in this area, which are implemented and used within the alcohol industry in Poland. Scope of the study relates to beverages of low alcohol excluding beer. The authors focus mainly on solutions for distribution and sales, but they won’t pass over complementary solutions for customer communication, including those aimed at education of consumers, which is essential in this industry. The structure of the paper makes it possible to present transformation of alcohol market in Poland, taking into account changes in the processes and the value they create for the consumer.
Źródło:
Research in Logistics & Production; 2020, 10, 1; 23--34
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exact distribution for the generalized F tests
Autorzy:
Fonseca, Miguel
Mexia, Joao
Zmyślony, Roman
Powiązania:
https://bibliotekanauki.pl/articles/729860.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
exact distribution theory
hypothesis testing
generalized F distribution
adaptative test
Opis:
Generalized F statistics are the quotients of convex combinations of central chi-squares divided by their degrees of freedom. Exact expressions are obtained for the distribution of these statistics when the degrees of freedom either in the numerator or in the denominator are even. An example is given to show how these expressions may be used to check the accuracy of Monte-Carlo methods in tabling these distributions. Moreover, when carrying out adaptative tests, these expressions enable us to estimate the p-values whenever they are available.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2002, 22, 1-2; 37-51
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Specificity Of The Marketing Distribution Policy; Diagnostic Procedures In The Enterprise
Autorzy:
Illiashenko, Sergii
Syhyda, Liubov
Powiązania:
https://bibliotekanauki.pl/articles/476239.pdf
Data publikacji:
2016
Wydawca:
Wyższa Szkoła Ekonomiczno-Humanistyczna w Bielsku-Białej
Tematy:
distribution
marketing distribution policy
marketing channels
distribution strategies
goods movement
diagnostics
internal and external environment
effectiveness
sales risks
Opis:
In the article stages of marketing distribution policy diagnostics are defined. At the first stage, it is proposed to analyse factors of enterprise internal and external environment (gathering information about general trends in the markets and factors of micro-environment (customers, competitors, suppliers, intermediaries, contact audiences). It is approved that analysis of general trends of the market’s development give an opportunity to determine the state of the enterprise macro-environment. At the same time, it is defined that the greatest influence on the marketing distribution policy provide such internal subsystems of the enterprise, as material and production, information, social, marketing and financial. At the second stage of marketing distribution policy diagnostics, researchers propose to analyse the internal system of marketing distribution policy at the enterprise. It is determined that the effectiveness of marketing distribution policy can be defined basing on indicators that can be combined in the following groups: 1) indicators of the enterprise’s market share (the market share of the enterprise, the rate of the market share increase), 2) indicators of sales activities profitability (the rate of profit from sales increase (decrease), the rate of receivables increase (decrease), product profitability, sales profitability), 3) indicators of sales expenses efficiency (sales volume of expenses, the rate of sales expenses increase (decrease), the ratio of increase (decrease) in sales from the sales costs increase (decrease), the profitability of investment in marketing and sales), 4) indicators of inventory (inventory levels, the proportion of unsold commodities in the value of the produced commodities, the coefficient of inventory turnover) and 5) indicators of service level (the rate of complaints increase (decrease), the rate of concluded contracts number increase (decrease)). And the third stage of marketing distribution policy diagnostics, it is recommended to identify internal (e.g., lack of sales personnel evaluation system, risk of marketing channels incorrect choice, risk of distribution strategies incorrect selection, risk of sales activity costs increasing, low level of assortment renovation and others) and external (e.g., foreign risk, inflation risk, tax risk, political risk, risk of legislative changes, risk of target segment incorrect selection, high level of competitive forces influence and others) sales risks that affect or may affect marketing distribution policy.
Źródło:
MIND Journal; 2016, 2; 1-13
2451-4454
Pojawia się w:
MIND Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bancassurance - alternatywny kanał dystrybucji usług ubezpieczeniowych
Bancassurance - alternative distribution channel of insurance service
Autorzy:
Nowacka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/446769.pdf
Data publikacji:
2015
Wydawca:
Mazowiecka Uczelnia Publiczna w Płocku
Tematy:
banking linkages and insurance distribution channel
banks
insurance companies
distribution channel
Opis:
In the recent years one can observe the increasing cooperation with banks and insurance companies in terms of sales of insurance services. This applies to life insurance and civil insurance. Especially strong banking and insurance linkages are evident in the case of life insurance because of gradually growing sales of these services in the bancassurance channel. Banking practice shows the most common insurance services are offered to customers in combination with banking products, loans, credit cards, bank accounts. Recent changes in the legal regulations are about good practices in the bancassurance forcing financial institutions change insurance services offer.
Źródło:
Zeszyty Naukowe PWSZ w Płocku. Nauki Ekonomiczne; 2015, 1(21); 129-142
1644-888X
Pojawia się w:
Zeszyty Naukowe PWSZ w Płocku. Nauki Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incomplete moments of the inverse Pólya distribution
Autorzy:
Gerstenkorn, Tadeusz
Jarzębska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/748721.pdf
Data publikacji:
1982
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Exact distribution theory
Opis:
Praca poświecona jest momentom czynnikowym (faktorialnym) niekompletnym dla rozkładu Pólyi zwanego odwrotnym, tzn. dla rozkładu, który przy założonym wyżej schemacie ustala prawdopodobieństwo liczby losowań potrzebnych do uzyskania żądanej ilości elementów określonego rodzaju. Zwrócono uwagę na możliwość operowania i takim rozkładem Pólyi odwrotnym, którego funkcja prawdopodobieństwa nie musi być związana z określonym schematem losowania i dla takiego (teoretycznego) przypadku wzory na momenty również uwzględniono. Ponieważ szczególnymi przypadkami rozważanego rozkładu są: ujemny rozkład dwumianowy oraz odwrotny rozkład hipergeometryczny, podano w pracy odpowiednie wzory i dla tych rozkładów.
The authors continue the study of incomplete moments of discrete distributions by Gerstenkorn [Rev. Roumaine Math. Pures Appl. 26 (1981), no. 3, 405–416; MR0627288; Bull. Inst. Internat. Statist. 46 (1975), no. 3, 290–297; MR0471020]. For a discrete nonnegative random variable X, the left incomplete factorial moment of order l truncated at s is defined by ∑sx=0x(x−1)⋯(x−(l−1))P(X=x). The authors evaluate the left incomplete factorial moments of the inverse Polya distribution (Theorem 1). From this result they derive the complete factorial moments and recurrence relations between incomplete and complete factorial moments as well as between incomplete factorial moments of different orders. These results are demonstrated for special inverse Polya distributions: the inverse Polya distribution connected with Polya trials, the negative binomial distribution, the inverse hypergeometric distribution, and the geometric distribution. MR0707818
Źródło:
Mathematica Applicanda; 1982, 10, 20
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Geometrical Structures of Bivariate Gamma Exponential Distributions
Autorzy:
Arwini, Khadiga Ali
Powiązania:
https://bibliotekanauki.pl/articles/1030111.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Pareto distribution
bivariate distributions
bivariate gamma exponential distribution
gamma distribution
information geometry
statistical manifold
Opis:
This paper is devoted to the information geometry of the family of bivariate gamma exponential distributions, which have gamma and Pareto marginals, and discuss some of its applications. We begin by considering the parameter bivariate gamma exponential manifold as a Riemannian 3-manifold; by following Rao’s idea to use the Fisher information matrix (FIM), and derive the α-geometry as: α-connections, α-curvature tensor, α-Ricci curvature with its eigenvalues and eigenvectors, and α-scalar curvature. Where here the 0-geometry corresponds to the geometry induced by the Levi-Civita connection, and we show that this space has a non-constant negative scalar curvature. In addition, we consider four submanifolds as special cases, and discuss their geometrical structures, and we prove that one of these submanifolds is an isometric isomorph of the univariate gamma manifold. Then we introduce log-bivariate gamma exponential distributions, which have log-gamma and log-Pareto marginals, and we show that this family of distributions determines a Riemannian 3-manifold which is isometric with the origin manifold. We give an analytical solution for the geodesic equations, and obtain the explicit expressions for Kullback-Leibler distance, J-divergence and Bhattacharyya distance. Finally, we prove that the bivariate gamma exponential manifold can be realized in R4, using information theoretic immersions, and we give explicit information geometric tubular neighbourhoods for some special cases.
Źródło:
World Scientific News; 2020, 143; 181-202
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Experimental Comparison of Popular Estimation Methods for the Weibull, Gamma and Gompertz Distributions
Autorzy:
Żerda, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/1373468.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
parameter estimation
Weibull distribution
gamma distribution
Gompertz distribution
MSE
Opis:
The aim of this study was to describe some parametric estimation methods for the Weibull, gamma and Gompertz distributions and to identify among them estimators the most efficient in practical applications. Techniques which are considered as traditional methods, like the maximum likelihood (MLE) and the method of moments (MM) estimation but also some newer and less commonly used techniques like the Lmoment estimator (LME), least-square estimator (LSE), generalized spacing estimator (GSE) and percentile estimator (PE) were presented. The application of each method was demonstrated in a simulation study using data sets generated for different distribution parameters and sample sizes. Discussed estimators were compared in terms of their efficiency and bias measured by mean-square errors (MSE) based on the simulations results.
Źródło:
Schedae Informaticae; 2011, 20; 67-82
0860-0295
2083-8476
Pojawia się w:
Schedae Informaticae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalized extended Marshall-Olkin family of lifetime distributions
Autorzy:
Goldoust, Mehdi
Mohammadpour, Adel
Powiązania:
https://bibliotekanauki.pl/articles/2034093.pdf
Data publikacji:
2022-03-15
Wydawca:
Główny Urząd Statystyczny
Tematy:
compound distribution
hazard rate function
lifetime distribution
maximum likelihood estimation
power series distribution
Opis:
We introduce a new generalized family of nonnegative continuous distributions by adding two extra parameters to a lifetime distribution, called the baseline distribution, by twice compounding a power series distribution. The new family, called the lifetime power series-power series family, has a serial arrangement of parallel structures, which extends the Marshall and Olkin structure. Four special models are discussed. A mathematical treatment of the new distributions is provided, including ordinary and incomplete moments, quantile, moment generating and mean residual functions. The maximum likelihood estimation technique is used to estimate the model parameters and a simulation study is conducted to investigate the performance of the maximum likelihood estimates. Its applicability is also illustrated by means of two real data sets.
Źródło:
Statistics in Transition new series; 2022, 23, 1; 55-74
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Managing the distribution process with an example of the FMCG market
Autorzy:
Kabus, Judyta
Powiązania:
https://bibliotekanauki.pl/articles/27313574.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
distribution
FMCG market
logistics
distribution channels
dystrybucja
rynek produktów szybkozbywalnych
logistyka
kanały dystrybucji
Opis:
Purpose: The purpose of this article is to present the problems and challenges faced by organisation of distribution logistics with a selected example. Comparing the company to the competition and focusing on the problems and challenges faced by the studied enterprise on the market of fast-moving consumer goods. Design/methodology/approach: The subject of the study is the evaluation of distribution channels of the selected enterprise through the analytical and point method. Findings: The obtained results, thanks to the use of the analytical-point method and the efficiency index of distribution channels, indicate that for the surveyed enterprise, Eurocash distribution channels are not sufficiently effective. The indicator of distribution costs in sales compared to the competition is the highest. Several factors had an impact on such results. Research limitations/implications: However, the issues presented in the paper regarding the problems and challenges of distribution organization cannot be considered as exhaustive, because the discussed topics constitute a multifaceted and interdisciplinary research area. The study would be more complete if the management of distribution logistics on the FMCG market were presented based on the changes caused by the Sars-Cov-19 pandemic. Practical implications: The conducted research draws attention to the effectiveness of distribution channels on the FMCG market. The article may be useful for enterprises providing services in this business sector. Social implications: The article shows the importance of making decisions in the area of distribution processes that significantly affect the entire supply chain, and thus customer service. The use of optimal distribution channels affects the efficiency of logistics services, contributing to an improvement in the quality of service provided to the final recipient and the competitiveness of the company on the FMCG market. Originality/value: The work is addressed to entrepreneurs operating in the FMCG industry. As well as all those interested in the subject of logistics, management and distribution on the market of fast-moving consumer goods.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2022, 160; 275--286
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of PCN Pathotypes in Poland
Autorzy:
Przetakiewicz, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2199730.pdf
Data publikacji:
2019-12-30
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
potato cyst nematodes (PCN)
Globodera rostochiensis
pathotypes
distribution
Opis:
Both Globodera rostochiensis (Wollenweber, 1923) Behrens, 1975 and Globodera pallida (Stone, 1973) are considered the most economically important nematode pest. Annual regional survey conduct in Poland have revealed high infestation of pathotype Ro1 to the northwest of the country and presence of new pathotype Ro5 of G. rostochiensis. In 2009-2013 fifty eight soil samples were tested. parasitic root organisms cause significant losses in quantity and quality of potato crops. In many European countries PCN have become a major problem in potato production mainly in starch potato cultivars. The pathotype Ro1 was detected mostly in central and northern Poland and pathotype Ro5 in four separated provinces: malopolskie, lubuskie, lubelskie and pomorskie. The abundance of cysts in location where the new pathotype was detected suggests that is a thread of further spread of pathotype Ro5 of G. rostochiensis in the country. Consequently, producers and farmers need to grow resistant potato cultivars to keep nematode population below damaging level. These results indicate the urgent need to prevent the spread of PCN to non-infested areas. This report focused on identification of nematode pathotypes in soil samples from infested polish fields and presentation of G. rostochiensis distribution on territory of Poland.
Źródło:
Plant Breeding and Seed Science; 2019, 79; 3-8
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The natural environment and changes in population distribution
Autorzy:
Skotnicki, Maksymilian
Powiązania:
https://bibliotekanauki.pl/articles/2032522.pdf
Data publikacji:
2006-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
population distribution
area denivelation
France
Opis:
A search for interrelations between natural conditions and changes in population distribution may be a significant subject of regional geography research. It is especially promising to explore this issue as exemplified by France, where we have specific statistical data from censuses carried out in administrative units which have remained unchanged for years. The paper discusses methods of searching for such interrelations on the basis of chosen examples.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2006, 12; 141-146
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Approach to Optimize the Cargo Distribution in Urban Areas
Autorzy:
Szczepański, Emilian
Jacyna, Marianna
Powiązania:
https://bibliotekanauki.pl/articles/503958.pdf
Data publikacji:
2013
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
multistage distribution system
vehicle routing problem
city logistic
reliability and ecology in distribution systems
Opis:
The paper contains considerations concerning the approach to determin acceptable plans for distribution in urban areas. The distribution systems as an area of research in terms of reliability and ecological transport were presented. Multilevel distribution systems were characterized. Formalization of the city transport network model and optimization task were done. An algorithm to solve the problem of route optimization based on the solution of the VRP (Vehicle Routing Problem) was proposed and described.
Źródło:
Logistics and Transport; 2013, 17, 1; 53-62
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metoda szybkiego szacowania rozkładów wielkości flokuł
Application of momentum method for the rapid estimation of self-adjusting size distribution of floes
Autorzy:
Dyląg, M.
Rosiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/2072367.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
rozkład wielkości flokuł
rekonstrukcja rozkładu wielkości cząstek
rozkład normalny
rozkład Gaudina-Melloya
floe size distribution
reconstruction of particle size distribution
normal distribution
Gaudin-Melloy distribution
Opis:
W pracy przedstawiono wyniki analizy porównawczej dotyczącej zastosowania metody momentów w dwóch wariantach opartych o wykorzystanie rozkładu normalnego oraz Gaudina-Melloya do rekonstrukcji tworzonych rozkładów wielkości cząstek.
Results of comparative calculations dealing with the application of momentum method are presented in the paper. Hereby two different size distributions models based on the normal distribution and the Gaudin-Melloy distribution are used for the reconstruction of particle size distribution.
Źródło:
Inżynieria i Aparatura Chemiczna; 2013, 5; 412--414
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka wybranych zagadnień dystrybucji towarów
Characteristics of selected issues of goods distribution
Autorzy:
Góra, G.
Matuszak, Z.
Żabińska, I.
Powiązania:
https://bibliotekanauki.pl/articles/314313.pdf
Data publikacji:
2018
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
dystrybucja towarów
kanały dystrybucji
distribution of goods
distribution channels
Opis:
Scharakteryzowano podstawowe pojęcia stosowane w dystrybucji towarów. Szczególną uwagę poświecono kanałom dystrybucji dokonując ogólnej ich charakterystyki. Na przykładzie firmy IKEA ogólnie scharakteryzowano sposoby dystrybucji towarów sklepów sieci IKEA. W charakterystyce dystrybucji ograniczono się do podstawowych sposobów: OPDC (Order Point Distribution Center), QR (Quick Response) oraz Transit.
In these article authors described the concepts used in the goods distribution. Special attention was paid to distribution channels that were generally characterized. In the article, the ways of distributing goods of the IKEA chain stores were characterized in a general way. The distribution characteristics were limited to the basic methods: OPDC (Order Point Distribution Center), QR (Quick Response) and Transit
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2018, 19, 12; 1063-1067
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Skew-normal Distribution - Basic Properties and Areas of Applications
Skośny rozkład normalny - podstawowe własności i obszary zastosowań
Autorzy:
Jadamus-Hacura, Maria
Powiązania:
https://bibliotekanauki.pl/articles/905693.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
skewness
skew normal distribution
skew-t distribution
Opis:
The skew-normal is a class of distribution that includes the normal distribution as a special case. A systematic treatment of the skew-normal distribution has been given in Azzalini (1985, 1986); generalizations to the multivariate case are given in Azzalini and Capitanio (1999), while Azzalini and Capitanio (2003) propose a further extension with a skew-t distribution. In this paper we study the properties of this class of density functions and we investigate the applicability of this distributions for modeling some financial and income data.
Klasa skośnych rozkładów normalnych zawiera jako szczególny przypadek rozkład normalny. Szczegółowemu omówieniu własności rozkładu skośnego normalnego poświęcona jest praca Azzalini (1985, 1986); przypadek wielowymiarowy przedstawili Azzalini i Capitanio (1999), natomiast w pracy tych autorów z roku 2003 można znaleźć dalsze rozszerzenie tej klasy rozkładów o rozkłady skośne t-Studenta. W niniejszym artykule przedstawiono podstawowe własności funkcji gęstości omawianych rozkładów i pokazano możliwości ich wykorzystania w modelowaniu dochodów i danych finansowych.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2006, 196
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zero-modified Poisson-Modification of Quasi Lindley distribution and its application
Autorzy:
Tharshan, Ramajeyam
Wijekoon, Pushpakanthie
Powiązania:
https://bibliotekanauki.pl/articles/2156994.pdf
Data publikacji:
2022-12-15
Wydawca:
Główny Urząd Statystyczny
Tematy:
over-dispersion
mixed Poisson distribution
PMQL distribution
zero modification
maximum likelihood estimation
Opis:
The Poisson-Modification of Quasi Lindley (PMQL) distribution is a newly introduced mixed Poisson distribution for over-dispersed count data. The aim of this article is to introduce the Zero-modified PMQL (ZMPMQL) distribution as an alternative to the PMQL distribution in order to accommodate zero inflation/deflation. The method of obtaining the ZMPMQL distribution jointly with some of its important properties, namely the probability mass and distribution functions, mean, variance, index of dispersion, and quantile function are presented. Furthermore, some of its special cases are discussed. The maximum likelihood (ML) estimation method is used for the unknown parameter estimation. A simulation study is conducted in order to evaluate the asymptotic theory of the ML estimation method and to show the superiority of the ML method over the method of moments estimation. The applicability of the introduced distribution is illustrated by using a real-world data set.
Źródło:
Statistics in Transition new series; 2022, 23, 4; 113-128
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Quasi Sujatha Distribution
Autorzy:
Shanker, Rama
Shukla, Kamlesh Kumar
Powiązania:
https://bibliotekanauki.pl/articles/1058938.pdf
Data publikacji:
2020-09-04
Wydawca:
Główny Urząd Statystyczny
Tematy:
Sujatha distribution
quasi Sujatha distribution
moments
reliability properties
stochastic ordering
stress-strength reliability
estimation of parameters
goodness of fit
Opis:
The aim of this paper is to introduce a new quasi Sujatha distribution (NQSD), of which the following are particular cases: the Sujatha distribution devised by Shanker (2016 a), the sizebiased Lindley distribution, and the exponential distribution. Its moments and momentsbased measures are derived and discussed. Statistical properties, including the hazard rate and mean residual life functions, stochastic ordering, mean deviations, Bonferroni and Lorenz curves and stress-strength reliability are also analysed. The method of moments and the method of maximum likelihood estimations is discussed for estimating parameters of the proposed distribution. A numerical example is presented to test its goodness of fit, which is then compared with other one-parameter and two-parameter lifetime distributions.
Źródło:
Statistics in Transition new series; 2020, 21, 3; 53-71
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bivariate negative binomial distribution of the Marshall-Olkin type
Autorzy:
Kopocińska, Ilona
Powiązania:
https://bibliotekanauki.pl/articles/1338936.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
bivariate negative geometrical
negative binomial distribution
Opis:
The bivariate negative binomial distribution is introduced using the Marshall-Olkin type bivariate geometrical distribution. It is used to the estimation of the distribution of the number of accidents in standard data.
Źródło:
Applicationes Mathematicae; 1998-1999, 25, 4; 457-461
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usability of Mobile Distribution Channel for Financial Services
Autorzy:
Lipowski, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/587274.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Dystrybucja
Usługi finansowe
Distribution
Financial services
Opis:
The paper presents results of the studies users of mobile banking. The research confirmed that users of mobile banking use other sales channels for financial services more frequently and more intensively. The most popular functions using by mobile banking customers were checking accounts. Mobile banking is perceived as insecure, even more than internet banking. The most expected functionality of mobile banking is the ability to make NFC mobile payments for purchases in store.
Źródło:
Studia Ekonomiczne; 2013, 150; 170-179
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On SαS density function
Autorzy:
Mazurkiewicz, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/729728.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
stable distribution
symmetric stable distribution
moments
scale mixture
Opis:
In this paper, we study some analytical properties of the symmetric α-stable density function.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2005, 25, 1; 91-101
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of changes in the distribution of income in the Czech Republic using mixture models
Autorzy:
Malá, Ivana
Powiązania:
https://bibliotekanauki.pl/articles/433957.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
income distributions
maximum likelihood estimate
finite mixture
lognormal distribution
Dagum distribution
Opis:
In the text the development of distributions (and their characteristics) of the equivalised net annual nominal income in Czech households in 2004-2009 is studied. Three-parametric lognormal and Dagum distributions are used as a model for income probability distribution. Moreover, finite mixtures of these distributions are estimated for the models with an observable component membership (given by the number of economically active members of the household and the number of unemployed members). Data from the European Union survey – Statistics on Income and Living Conditions 2005-2010 – are used for the analysis. All the estimates in the text are obtained using the maximum likelihood method.
Źródło:
Śląski Przegląd Statystyczny; 2013, 11(17); 137-150
1644-6739
Pojawia się w:
Śląski Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the Akaike information criterion for an assessment of sugar beet crop distribution
Zastosowanie kryterium Akaike do oceny rozkladu plonow burakow cukrowych
Autorzy:
Kornacki, A.
Ostroga, K.
Powiązania:
https://bibliotekanauki.pl/articles/791936.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
sugar-beet
crop distribution
Akaike information criterion
application
normal distribution
log-normal distribution
model selection
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marketplaces Restrictions and Selective Distribution after Coty Germany
Autorzy:
Szot, Patrycja
Amza, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1395556.pdf
Data publikacji:
2018-12-30
Wydawca:
Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Tematy:
Coty
platform ban
selective distribution
distribution of luxury goods
distribution of branded goods
restriction of online sales
e-commerce; restriction on passive sales
price comparison tools
marketplace restriction
Opis:
This article discusses the framework of selective distribution agreements within EU competition law following the Coty Germany case and the EU Commission’s 2017 E-commerce report. It argues that the judgment removed, in essence, the limitation of sales via online platforms from the ‘by object box’. In respect of luxury goods, the ban is considered not to infringe competition law at all. In this context, the article addresses one of the judgment’s key points: what constitutes a ‘luxury good’ and evaluates to what an extent this definition can be practically applied. The authors also embark on the conditions under which the restriction is considered proportionate (when applied to non-luxury goods) and point to the risk of divergent interpretations of platform bans across member states. To illustrate the latter, several examples are given from national case-law. The considerations are completed with a brief look at problematic restrictions on the use of price comparison tools.
Cet article traite de la distribution sélective dans le cadre de la législation européenne sur la concurrence suite au jugement Coty Germany et au rapport de la Commission Européenne sur le e-commerce datant de 2017. De l’avis des auteurs, ce jugement a exclu de la catégorie «restrictions par objet» la limitation des ventes sur des plateformes tierces. Par contre, en ce qui concerne les produits de luxe, cette restriction n’est pas considérée comme une violation du droit de la concurrence. Dans ce contexte, l’article aborde l’un des points clés du jugement: la définition legale d’un produit de luxe, et évalue dans quelle mesure cette définition est applicable en pratique. Les auteurs s’intéressent également aux conditions sous lesquelles la restriction des ventes sur des plateformes tierces (pour les produits non luxueux) est considérée proportionnée et soulignent le risque d’interprétations divergentes au sein des états membres. Pour illustrer ce point, plusieurs exemples tirés de la jurisprudence nationale sont donnés. L’article aborde enfin brièvement les problèmes de restrictions relatives aux comparateurs de prix en ligne.
Źródło:
Yearbook of Antitrust and Regulatory Studies; 2018, 11(18); 241-284
1689-9024
2545-0115
Pojawia się w:
Yearbook of Antitrust and Regulatory Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electricity Distribution Effectiveness
Efektywność dystrybucji energii elektrycznej
Autorzy:
Szpyra, W.
Nowak, W.
Tarko, R.
Powiązania:
https://bibliotekanauki.pl/articles/397481.pdf
Data publikacji:
2015
Wydawca:
ENERGA
Tematy:
elektroenergetyczne sieci rozdzielcze
rachunek kosztów
efektywność
dystrybucja energii elektrycznej
power distribution grids
cost accounting
electricity distribution effectiveness
Opis:
This paper discusses the basic concepts of cost accounting in the power industry and selected ways of assessing the effectiveness of electricity distribution. The results of effectiveness analysis of MV/LV distribution transformer replacement are presented, and unit costs of energy transmission through various medium-voltage line types are compared. The calculation results confirm the viability of replacing transformers manufactured before 1975. Replacing transformers manufactured after 1975 – only to reduce energy losses – is not economically justified. Increasing use of a PAS type line for energy transmission in local distribution networks is reasonable. Cabling these networks under the current calculation rules of discounts for excessive power outages is not viable, even in areas particularly exposed to catastrophic wire icing.
W artykule rozważono wybrane zagadnienia z zakresu rachunku kosztów oraz sposobów wykorzystywanych do oceny efektywności w elektroenergetyce. Przedstawiono wyniki analizy efektywności wymiany transformatorów dystrybucyjnych SN/nn oraz porównano jednostkowe koszty przesyłania energii, przy wykorzystaniu różnych typów linii średniego napięcia. Wyniki obliczeń potwierdzają opłacalność wymiany transformatorów wyprodukowanych przed 1975 rokiem. Wymiana transformatorów wyprodukowanych po 1975 roku – tylko w celu ograniczenia strat energii – nie znajduje uzasadnienia ekonomicznego. Jeśli chodzi o przesyłanie energii w terenowych sieciach rozdzielczych, to zasadne jest bardziej powszechne wykorzystywanie linii typu PAS. Kablowanie tych sieci przy obecnych zasadach naliczania bonifikat za przekroczenie dopuszczalnych czasów przerw w zasilaniu nie jest opłacalne, nawet na terenach szczególnie narażonych na występowanie katastrofalnego oblodzenia przewodów.
Źródło:
Acta Energetica; 2015, 4; 126-130
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Precision of Standardized Precipitation Index (SPI) Based On Years 1954-1995 in Łódź
Autorzy:
Gąsiorek, E.
Musiał, E.
Powiązania:
https://bibliotekanauki.pl/articles/123221.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
standardized precipitation index
gamma distribution
normal distribution
lognormal distribution
Opis:
This paper evaluates the accuracy of estimates of the Standardized Precipitation Index (SPI) using gamma, normal and log-normal distributions. In order to classify the above methods, the authors performed an analysis of the quality of theoretical distributions to empirical distribution, obtained on the basis of monthly precipitation sums during the vegetation season in a multi-year period 1954–1995 in Łódź.
Źródło:
Journal of Ecological Engineering; 2015, 16, 4; 49-53
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approximation by Poisson law
Autorzy:
Aleškevičienė, Aldona
Statulevičius, Vytautas
Powiązania:
https://bibliotekanauki.pl/articles/729712.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
Poisson distribution
compound Poisson distribution
asymptotic expansions
large deviations
cumulants
Opis:
We present here the results of the investigation on approximation by the Poisson law of distributions of sums of random variables in the scheme of series. We give the results pertaining to the behaviour of large deviation probabilities and asymptotic expansions, to the method of cumulants, with the aid of which our results have been obtained.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2005, 25, 2; 161-179
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diurnal vertical distribution of krill aggregations in the Western Antarctic
Autorzy:
Kalinowski, Janusz
Witek, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2058195.pdf
Data publikacji:
1980
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
krill
vertical distribution
Źródło:
Polish Polar Research; 1980, 1, 4; 127-146
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure risk analysis in the water distribution system
Autorzy:
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069656.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
risk analysis
failure
risk
water distribution system
Opis:
A water distribution system (WDS) ought to be high reliable continuous operating system. Failure factors in WDS should be identified and prioritised, for example, the causing factors in the most frequent failures in water-pipe network. In this paper, the failure risk analysis of the WDS is presented, and accordingly, a New method consisting the failures index (FI) and the evaluation of risk of failure within the relevant area, based on the assumed categories (tolerable, controlled and unacceptable risk). It is expecting that the methodology for the WDS performance risk analysis would provide the city leadership for decision making support.
Źródło:
Journal of Polish Safety and Reliability Association; 2010, 1, 1; 247--254
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability modelling of water distribution system (WDS) for operation and maintenance needs
Autorzy:
Kwietniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/241466.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
reliability
water distribution
modeling
Opis:
From the point of view of enterprises dealing with WDS operation and maintenance, parameter assessment of reliability of WDS functioning is one of the basics for the assessment of the quality of water-supply services afforded by enterprises. To make reliability assessment possible, a two-state model of WDS reliability has been proposed. The basic parameter of this model is the probability of satisfactory performance of the system as a function of its reliability. Other, no less important parameters characterizing the model are probability of part fault state, intensity of occurrence of part fault states, average time of satisfactory performance state and average time of part fault state of the system. The model has been used to estimate the function of a definite WDS reliability on the basis of operational research of reliability during 3years of its functioning.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2004, 51, 1; 85-92
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Banking Services and Distribution Channels – Evolution and Prospects
Autorzy:
Murowaniecki, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/108660.pdf
Data publikacji:
2015
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
Banking service
distribution channel
IT in banking
Opis:
The article presents the process of evolution of banking services and banking distribution channels. It deals with the history and identifies main factors that affecting the change. In the following discussion, it presents phenomena that affect the future appearance of banking. These include changes in the economic and technological environment.
Źródło:
Journal of Applied Computer Science Methods; 2015, 7 No. 2; 105-115
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
UNBALANCED DISTRIBUTION OF FOOD
Autorzy:
Sarikaya, Buse
Powiązania:
https://bibliotekanauki.pl/articles/1036580.pdf
Data publikacji:
2017-11-14
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
food distribution
unbalanced nutrition
common nutritional problems in Society
malnutrition
obesity
Opis:
While people starve every day, food is being wasted. Simultaneously a food shortage does not exist on our planet. There is no lack of food. Production and distribution are the two primary causes of this problem. Unbalanced nutrition is the cause of obesity, overweight and hunger. Insufficient food intake causes nutritional problems such as vitamin and Iodine deficiency, Anaemia, Underweight and Stunting, Low birth weight, Protein-Energy Malnutrition, excess intake of food causes. However, nutritional health problems are not only caused by the absense of food but also from excessive food intake causing diabetes, hypertension, heart diseases etc. These all health problems effect societies worldwide. Bringing the global burden of diet-related noncomunicable diseases under control and enhancing public nutrition and health requires a muti-diciplinary approach.
Źródło:
Society Register; 2017, 1, 1; 199-208
2544-5502
Pojawia się w:
Society Register
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Compound of an Inflated Pascal Distribution with the Poisson One
Złożenie inflacyjnego rozkładu Pascala z rozkładem Poisson
Autorzy:
Gerstenkorn, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/904717.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
compound distributions
compound inflated Pascal-Poisson distribution
inflated Pascal distribution
Poisson distribution
factorial
crude and incomplete moments
recurrence relations for the moments
Opis:
W pracy prezentowane jest złożenie inflacyjnego rozkładu Pascala z rozkładem Poissona. W części wstępnej pracy podany jest przegląd wyników badawczych dotyczących tematu złożeń rozkładów ze szczególnym uwzględnieniem polskich autorów. W dalszych rozdziałach podano funkcję prawdopodobieństwa rozkładu złożonego Pascal- -Poisson oraz jego momenty silniowe, zwykłe, niekompletne oraz związki rekurencyjne.
In this paper there is presented a compound of an inflated Pascal distribution with the Poisson one. In the introductory part of the paper is giving an overview of the last results in topic of compounding of distributions, considering also the Polish results. In succeeding Sections, probability function of the compound distribution Pascal-Poisson, factorial, crude and incomplete moments as well recurrence relations of this distribution are presented. MSClassilication: 60
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2005, 194
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An EWMA control chart for the exponential distribution using repetitive sampling plan
Autorzy:
Azam, M.
Aslam, M.
Jun, C. -H.
Powiązania:
https://bibliotekanauki.pl/articles/406458.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
control chart
EWMA statistic
exponential distribution
normal distribution
average run length
Opis:
A new EWMA control chart has been proposed under repetitive sampling when a quantitative characteristic follows the exponential distribution. The properties of the proposed chart, including the average run lengths has been is compared with two existing control charts with the help of simulated data. An application of the proposed chart hs been illustrated using a healthcare data set.
Źródło:
Operations Research and Decisions; 2017, 27, 2; 5-19
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Modification of the Probability Weighted Method of Moments and its Application to Estimate the Financial Return Distribution Tail
Autorzy:
Małecka, Marta
Pekasiewicz, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/465796.pdf
Data publikacji:
2014
Wydawca:
Główny Urząd Statystyczny
Tematy:
PWMM
generalized Pareto distribution
tail estimate
distribution function estimate
Opis:
The issue of fitting the tail of the random variable with an unknown distribution plays a pivotal role in finance statistics since it paves the ground for estimation of high quantiles and subsequently offers risk measures. The parametric estimation of fat tails is based on the convergence to the generalized Pareto distribution (GPD). The paper explored the probability weighted method of moments (PWMM) applied to estimation of the GPD parameters. The focus of the study was on the tail index, commonly used to characterize the degree of tail fatness. The PWMM algorithm requires specification of the cdf estimate of the so-called excess variable and depends on the choice of the order of the probability weighted moments. We suggested modification of the PWMM method through the application of the level crossing empirical distribution function. Through the simulation study, the paper investigated statistical properties of the GPD shape parameter estimates with reference to the PWMM algorithm specification. The simulation experiment was designed with the use of fat-tailed distributions with parameters assessed on the basis of the empirical daily data for DJIA index. The results showed that, in comparison to the commonly used cdf formula, the choice of the level crossing empirical distribution function improved the statistical properties of the PWMM estimates. As a complementary analysis, the PWMM tail estimate of DJIA log returns distribution was presented.
Źródło:
Statistics in Transition new series; 2014, 15, 3; 495-506
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The odd power generalized Weibull-G power series class of distributions: properties and applications
Autorzy:
Oluyede, Broderick
Moakofi, Thatayaone
Chipepa, Fastel
Powiązania:
https://bibliotekanauki.pl/articles/2034112.pdf
Data publikacji:
2022-03-15
Wydawca:
Główny Urząd Statystyczny
Tematy:
Weibull-g distribution
power series
Poisson distribution
logarithmic distribution
maximum likelihood estimation
Opis:
We develop a new class of distributions, namely, the odd power generalizedWeibull-G power series (OPGW-GPS) class of distributions. We present some special classes of the proposed distribution. Structural properties, have also been derived. We conducted a simulation study to evaluate the consistency of the maximum likelihood estimates. Moreover, two real data examples on selected data sets, to illustrate the usefulness of the new class of distributions. The proposed model outperforms several non-nested models on selected data sets.
Źródło:
Statistics in Transition new series; 2022, 23, 1; 89-108
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A multichannel programmable distribution amplifier
Autorzy:
Różyc, K.
Kwiatkowski, P.
Sawicki, M.
Jachna, Z.
Szplet, R.
Powiązania:
https://bibliotekanauki.pl/articles/114493.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
programmable device
distribution amplifier
Opis:
This paper presents the design, operation and test results of a multichannel programmable distribution amplifier. The distributor is based on a reprogrammable device Spartan-6 FPGA (Xilinx) and is intended to distribute a 10 MHz or 5 MHz frequency reference signal as well as 1 PPS pulses. It is built in a 2U, 19” rack-mount enclosure and is equipped with a single optical and seven electrical inputs, as well as two optical and fourteen electrical outputs The transition time and additive jitter of the distribution amplifier were tested and they did not exceed 14 ns and 4.5 ps RMS (for electrical inputs/outputs), respectively. In the case of optical input/outputs, the results depend on the parameters of converters involved. The values of delays and jitter introduced by the distributor are slightly larger than for dedicated integrated circuits, but the advantage of this solution is the possibility to build signal distributors with a larger number of inputs/outputs and the ease to modify and meet requirements of various applications.
Źródło:
Measurement Automation Monitoring; 2015, 61, 7; 314-316
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parthenium hystrophorus in Ethiopia: Distribution, Impact and Management - A Review
Autorzy:
Wubneh, Wasihun Yaregal
Powiązania:
https://bibliotekanauki.pl/articles/1066272.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ethiopia
Parthenium hystrophorus
distribution
impact
management
Opis:
Parthenium, an aggressive invasive weed, is believed to be a native to North and South America. Due to its allelopathic effect and adaptability to different environmental conditions, it is now distributed throughout the world including Ethiopia, where it was reported first in 1988, in the eastern and later in the north-eastern parts of the country. Some scholars believe that Parthenium came to Ethiopia together with the donated grain when the country was hit by famine. Othersopine that entered into the country during the Ethio - Somalia war in 1976/77 through military vehicles from Somalia. Still others also presume it has slipped into Ethiopia from the neighboring countries like Kenya. The weed aggressively invaded several rangelands in the country due to its allelopathic effect, capacity to produce copious amount of seeds and its ability to compete for resources to survive. It can affect the biodiversity, agriculture, human and animal health and the economic activities of society. Although several mitigation methods, mechanical, cultural, chemical, biological and utilization methods are used to control it, there is no single effective method, as each method suffers from limitations. This noxious weed can be managed by public awareness and participatory integrated approaches. There is a need to encourage the research on utilization of this weed for insecticidal properties and try to evaluate the potential on pests of different crops. Therefore, managing this troublesome weed through integrated and eco-friendly approaches is suggested for an effective management.
Źródło:
World Scientific News; 2019, 130; 127-136
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The distribution of Chrysanthemum segetum L. (Asteraceae) in Poland.
Autorzy:
Sobisz, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2199566.pdf
Data publikacji:
2010-06-01
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
archaeophytes
distribution in Poland
Chrysanthemum segetum
vascular plants
Opis:
The distribution of Chrysanthemum segetum L. in Poland, based on a field research, herbarium materials, literature and unpublished data, is described with a list of localities. Altogether, 352 localities (210 ATPOL squares) for this species have been identified. Most localites are concentrated in North and West parts of Poland...
Źródło:
Plant Breeding and Seed Science; 2010, 61; 3-14
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The efficiency of integrators of a metallurgic products distribution network
Autorzy:
Kramarz, M.
Powiązania:
https://bibliotekanauki.pl/articles/409439.pdf
Data publikacji:
2012
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
distribution networks
integrator
CSI
metallurgic products
Opis:
Specialization of enterprises in distribution networks realizing processes connected with adaptation of product to specific customer requirements, causes a growing complexity of manufacturing and logistic processes. That is why it is essential for selected enterprises to take over risks associated with co-ordination of processes in so complex systems. The study presented in the article concerns the integrator model in the distribution network which is a prevailing model in the metallurgic products distribution sector. The efficiency of the integrator was examined by means of the the customer satisfaction index (CSI).
Źródło:
Research in Logistics & Production; 2012, 2, 3; 209-220
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Use of the Extreme Value Distribution in Monitoring Production Processes
O wykorzystaniu rozkładu wartości ekstremalnych w monitorowaniu procesów
Autorzy:
Kończak, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/904815.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
process control
extreme value distribution
Gumbel distribution
Monte Carlo
Opis:
In many statistical applications the main point of interest is estimating some population central characteristic such as the mean or the median. The Shewhart’s control chart X is based on monitoring the average process level. However, in some areas the main interest is based on estimating the maximum or the minimum. The proposal of the monitoring processes based on the properties of the Gumbel distribution is presented in the paper. The properties of the proposed method have been analyzed in the Monte Carlo study.
Klasyczne metody pozwalające na monitorowanie poziomu przeciętnego procesów produkcyjnych odwołują się zwykle do założenia normalności rozkładu badanej zmiennej i niezależności kolejnych pomiarów. W wielu analizach statystycznych interesująca jest ocena poziomu przeciętnego badanej charakterystyki. Tak jest np. przy monitorowaniu procesów z wykorzystaniem karty kontrolnej X . Jednak w wielu zastosowaniach może być interesująca ocena wielkości maksymalnych lub minimalnych. W artykule przedstawiono propozycję wykorzystania własności rozkładu wartości ekstremalnych w monitorowaniu procesów. Rozważania teoretyczne zostały uzupełnione analizami symulacyjnymi własności proponowanej metody.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2013, 286
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric Modelling of Income Distribution in Central and Eastern Europe
Autorzy:
Brzeziński, Michał
Powiązania:
https://bibliotekanauki.pl/articles/483299.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
generalized beta of the second kind (GB2) distribution
parametric modelling
income distribution
Lorenz dominance
Central and Eastern Europe
Opis:
This paper models income distribution in four Central and Eastern European (CEE) countries (the Czech Republic, Hungary, Poland and the Slovak Republic) in 1990s and 2000s using parametric models of income distribution. In particular, we use the generalized beta distribution of the second kind (GB2), which has been found in the previous literature to give an excellent fit to income distributions across time and countries. We have found that for Poland and Hungary, the GB2 model fits the data better than its nested alternatives (the Dagum and Singh-Maddala distributions). However, for Czech Republic and Slovak Republic the Dagum model is as good as the GB2 and may be preferred due to its simpler functional form. The paper also found that the tails of parametric income distribution in the Czech Republic, Poland and the Slovak Republic have become fatter in the course of transformation to market economy, which provides evidence for growing income bi-polarization in these societies. Statistical inference on changes in income inequality based on parametric Lorenz dominance suggests that, independently of inequality index used, income inequality in the Czech Republic, Poland and the Slovak Republic has increased during transformation. For Hungary, there is no Lorenz dominance and conclusions about the direction of changes in income inequality depend on the cardinal inequality measure used.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2013, 5, 3; 207-230
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aproksymacja rozkładu dochodów ludności Polski za pomocą modeli Daguma i Zengi
Approximation of distribution of Poland’s population’s income according to Dagum and Zenga models
Autorzy:
Trzcińska, Kamila
Powiązania:
https://bibliotekanauki.pl/articles/1046651.pdf
Data publikacji:
2019-04-30
Wydawca:
Główny Urząd Statystyczny
Tematy:
rozkład dochodów
model Daguma
model Zengi
model estymacji
income distribution
Dagum distribution
Zenga distribution
estimation methods
Opis:
Celem pracy jest analiza dochodów ludności Polski za pomocą rozkładów Daguma i Zengi. Rozkład Zengi zaproponowany w 2010 r. jest nowym, konkurencyjnym rozkładem, który nie był dotychczas stosowany do badania płac i dochodów w Polsce. W artykule przedstawiono rozkłady Daguma i Zengi oraz wyniki aproksymacji rozkładów płac pochodzących z badania budżetów gospodarstw domowych ludności Polski w 2014 r. Obliczone miary zgodności dopasowania rozkładów teoretycznych do empirycznych wskazują, że rozkład Zengi lepiej opisuje rozkład płac ludności Polski niż – uważany dotychczas za jeden z najlepszych – rozkład Daguma.
The aim of this paper is to analyse the income of the population of Poland using the Dagum and the Zenga distributions. The Zenga distribution, introduced in 2010, is a new distribution which has not been yet applied to analysing wages and income in Poland. The paper presents both the Dagum and Zenga distributions, as well as the results of the approximations of wage distributions drawn from the 2014 household budget survey. The calculated degree of compliance of the theoretical distribution with the empirical one demonstrates that the Zenga distribution describes the distribution of the income of the Polish population more reliably than the Dagum distribution, which so far has been regarded as one of the best.
Źródło:
Przegląd Statystyczny; 2019, 66, 4; 270-286
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On strong uniform distribution
Autorzy:
Nair, R.
Powiązania:
https://bibliotekanauki.pl/articles/1392186.pdf
Data publikacji:
1990
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Acta Arithmetica; 1990, 56, 3; 183-193
0065-1036
Pojawia się w:
Acta Arithmetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podstawowe pojęcia wolnej probabilistyki
Basic concepts of free probability theory
Autorzy:
Ejsmont, Wiktor
Powiązania:
https://bibliotekanauki.pl/articles/434085.pdf
Data publikacji:
2016
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
free probability theory
Wigner’s distribution
Gauss distribution
Opis:
Free probability theory was created by Dan Voiculescu, motivated by his efforts to understand special classes of von Neumann algebras. In the following we will give, mostly from the probability point of view, a survey on some of the basic ideas and results of free probability theory and show that in free probability theory, the role of Wigner’s semicircle distribution is analogous to that of the normal distribution in classical probability theory.
Źródło:
Śląski Przegląd Statystyczny; 2016, 14 (20); 65-74
1644-6739
Pojawia się w:
Śląski Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sequential Tests for Truncated Distribution Parameters
Testy sekwencyjne dla parametrów rozkładów uciętych
Autorzy:
Pekasiewicz, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/905697.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
sequential test
truncated distribution
expected value
Opis:
Sequential probability ratio tests can be used to verify hypotheses about truncated distribution parameters when error probabilities of the first and the second type are set. For parameters of normal and exponential distributions truncated on both sides and on the left side, statistics of sequential probability ratio test were determined. Since the sample size in these tests is the random variable, formulas for expected values o f sample size for considered tests were also defined.
Ilorazowe testy sekwencyjne można stosować do weryfikacji hipotez o parametrach rozkładów uciętych, przy ustalonych prawdopodobieństwach błędów I-go i Il-go rodzaju. Dla parametrów obustronnie i lewostronnie uciętych rozkładów normalnych i wykładniczych zostały wyznaczone statystyki ilorazowych testów sekwencyjnych. Ponieważ liczebność próby w tych testach jest zmienną losową, określone zostały również wzory na wartości oczekiwane liczebności prób dla rozważanych testów.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2006, 196
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On regional aspects of vertical distribution of montenegrin population
Autorzy:
Lješević, Milutin
Doderović, Miroslav
Powiązania:
https://bibliotekanauki.pl/articles/1050879.pdf
Data publikacji:
2020-03-31
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
region
population
vertical distribution
migrations
demographic politic
Opis:
The coordinates of 18°26' and 19°22' east latitude and 41°52' and 43°32' north longitude set geographic position of Montenegro. The total length of its land borders is 614 km. The border alongside Croatia is 14 km long, alongside Bosnia and Herzegovina 225 km, alongside Serbia 20 km, and alongside Albania 172 km of the state border (partly across the Scadar lake and alongside the river Bojana). There is a 100 km of air distance between the furthest points at the sea. The factual length of the Montenegrin coast is about 280 km, which makes the serrated coefficient of 2.8. Montenegro is in proportion to its territory and population the smallest of all ex-Yugoslav republics. It spreads over the area of 13,812 square kilometres which makes 5.4% of ex-Yugoslav territory. According to 2003 census, 620.145 citizens lived in 1240 settlements, which were 45 citizens on a square kilometre. Out of 21 municipalities six are in the coastal region. The largest municipality in Montenegro (as well as in both ex-Yugoslavia and in the State union of Serbia and Montenegro) is Nikšić with 2,065 square kilometres, and the smallest is Tivat with 46 square kilometres. The capital of Montenegro is Podgorica with population of 96,076.
Źródło:
Quaestiones Geographicae; 2020, 39, 1; 93-98
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technologia UWB w procesie dystrybucji
UWB technology in the distribution process
Autorzy:
Rzempołuch, M.
Powiązania:
https://bibliotekanauki.pl/articles/2058321.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dystrybucja
cross docking
Ultra Wide Band
distribution
Opis:
Celem artykułu jest przedstawienie i objaśnienie technologii UWB oraz możliwości jej zastosowania, a w szczególności dla procesu dystrybucji. Przedstawiono model w jakim mogłaby funkcjonować ta technologia w cross dockingu.
The aim of the article is to present and explain the UWB technology and its applicability, in particular for the distribution process. A cross docking model with this technology
Źródło:
Journal of TransLogistics; 2018, 4, 1; 149--156
2450-5870
Pojawia się w:
Journal of TransLogistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The distribution of Carex hartmanii Cajander in Poland
Autorzy:
Sotek, Z
Powiązania:
https://bibliotekanauki.pl/articles/57275.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
plant distribution
Carex hartmanii
Hartman's sedge
endangered plant
locality
Polska
Opis:
The distribution of Carex hartmanii Cajander in Poland is described based on herbarium materials and supplemented by literature information and unpublished data. The brief description of its taxonomic characteristics, habitat and general distribution is also included.
Źródło:
Acta Societatis Botanicorum Poloniae; 2008, 77, 4; 323-326
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geographic distribution of Turkish oaks
Autorzy:
Uslu, E.
Bakis, Y.
Powiązania:
https://bibliotekanauki.pl/articles/41702.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
oak
Quercus
species richness
cluster analysis
geographic distribution
Turkey [geogr.]
Opis:
Distribution of Turkish Quercus L. has a crucial value since Turkey is a transition place between Europe and Asia and located at the meeting point of three phytogeographical regions. To compare the diversity of species and to find the distribution patterns of oaks, species richness of the most current distributions were studied. Relationships of phytogeographical regions and presence of the Anatolian Diagonal relevant to oak distributions were also investigated. Analyses were performed on Davis'grid square system. The highest richness of Quercus species were found at north-western Turkey which were located in the meeting place of Asia and Europe. The lowest richness scores were found at eastern and south-eastern Anatolia. Moreover, latitude, longitude and altitude histograms showed a correlation with species richness. However, the presence of Anatolian Diagonal is partially supported.
Źródło:
Dendrobiology; 2012, 67
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of Melanopsidae (Mollusca, Gastropoda) in Ukraine
Autorzy:
Stelmashchuk, N.M.
Powiązania:
https://bibliotekanauki.pl/articles/83275.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
distribution
Melanopsidae
Mollusca
Gastropoda
melanopsid
freshwater snail
snail
Ukraine
Źródło:
Folia Malacologica; 2012, 20, 1
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of Distribution System Reliability
Autorzy:
Zemite, L.
Gerhards, J.
Gorobetz, M.
Levchenkov, A.
Powiązania:
https://bibliotekanauki.pl/articles/136268.pdf
Data publikacji:
2016
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
distribution network
simulation
power supply reliability
Opis:
Reliability analysis of distribution systems has been attracting increasing attention. A special concern pertains to the distribution networks on which most failures occurs. The optimization of distribution system of breakers and power switches is a possible strategy to improve reliability. The paper describes development procedure for modelling restoring after a fault and calculating associated reliability indices and customers’ outage costs. The developed model of the network and reliability and outage costs calculating algorithm is suitable for multi-criteria analysis of the network. Proposed reliability and outage costs calculation algorithm is based on Monte Carlo simulation and genetic algorithm.
Źródło:
Transactions on Environment and Electrical Engineering; 2016, 1, 3; 94-99
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Load distribution in the worm meshing
Autorzy:
Sabiniak, H. G.
Powiązania:
https://bibliotekanauki.pl/articles/281175.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
finite differences
circular plate
cantilever plates
worm teeth
load distribution
Opis:
The paper presents a theoretical analysis of deflections of circular and rectangular cantilever plates of an elastically built-in edge. The problem has been solved using the finite difference method. A method of determination of load distribution between two plates being in contact along an arbitrary line has been presented. Different shapes of these plates constitute models of mating of cylindrical and globoidal worm meshings. To verify the presented theory of searching for load distributions along the contact lines in these meshings, experimental investigations with the freezing of stresses in the cylindrical worm meshing have been carried out. Directions of investigations that would specify further theoretical considerations over load distribution in globoidal gear meshings have been indicated.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1169-1181
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Are continuous mappings preserving normality necessarily linear?
Autorzy:
Wesołowski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1339344.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
normal distribution
Cauchy distribution
distributions of functions of random variables
Opis:
An example of a normal nonlinear continuous function of a normal random variable is given. Also the Cauchy case is considered.
Źródło:
Applicationes Mathematicae; 1996-1997, 24, 1; 109-112
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Numerical Modeling of Thermal Stress Distribution in Thermal Barrier Coatings
Autorzy:
Jasik, A.
Powiązania:
https://bibliotekanauki.pl/articles/353586.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
temperature distribution
thermal stress
TBC
FEM
Opis:
The paper presents the results of numerical calculations of temperature and thermal stress distribution in thermal barrier coatings deposited by thermal spraying process on the nickel based superalloy. An assumption was made to apply conventional zirconium oxide modified with yttrium oxide (8YSZ) and apply pyrochlore type material with formula La2Zr2O7. The bond coat was made of NiCoCrAlY. Analysis of the distribution of temperature and stresses in ceramic coatings of different thicknesses was performed in the function of bond-coat thickness and the type of ceramic insulation layer. It was revealed that the thickness of NiCrAlY bond-coat has not significant influence on the stress distribution, but there is relatively strong effect on temperature level. The most important factor influenced on stress distribution in TBC system is related with type and properties of ceramic insulation layer.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1433-1437
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Logistic centres and distribution centres - similarities and distictions
Autorzy:
Izdebski, W.
Kryś, P.
Powiązania:
https://bibliotekanauki.pl/articles/409540.pdf
Data publikacji:
2018
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
logistic centre
distribution centre
logistics
supply chain
Opis:
Differentiation between logistic and distribution centres is an important part of the logistics nomenclature, especially as both names are often used in wrong contexts and interchangeably. In the article, a literature analysis aimed at differentiating between them and establishing the most important distinctions has been conducted.
Źródło:
Research in Logistics & Production; 2018, 8, 4; 351-359
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-Criteria Optimization in Fuel Distribution
Autorzy:
Pempera, J.
Żelazny, D.
Powiązania:
https://bibliotekanauki.pl/articles/409566.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
vehicle routing problem
multi-criteria
discrete optimization
fuel distribution
Opis:
This paper deals with some computational study of multi-criteria optimization in fuel distribution problem. We consider vehicle routing problem, e.g. routing of a fleet of tank trucks, for one of the famous polish petroleum companies. For the purpose of solving this problem, we developed the random search algorithm, which explores the broad range of feasible sets of routes and searches for non-dominated multi-criteria solutions. The problem is examined on real data, which contains distances between 50 petrol stations and one central warehouse (refinery). Obtained results indicate, that it is possible to obtain single solution and satisfy both optimization criteria. Based on the analysis of the collected data, we formulate a number of proposals useful in future for construction of algorithms for multi-criteria fuel distribution optimization.
Źródło:
Research in Logistics & Production; 2015, 5, 1; 77-84
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Distribution Channels in a Selected Meat Processing Company
Autorzy:
Kuboń, Maciej
Kabiesz, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/504357.pdf
Data publikacji:
2019
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
logistics
channel
distribution
evaluation
analysis
Opis:
The purpose of this article is to analyze distribution logistics on the example of a selected meat processing establishment, as well as to assess existing distribution channels according to criteria determining the usability, efficiency and nature of the channel. Based on the research and analysis (analytical and point method), five distribution channels existing in the company were characterized and evaluated. Based on the results, it was determined which of the existing channels is the best one, and also the directions for their further development were presented.
Źródło:
Logistics and Transport; 2019, 43, 3; 21-26
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Distribution of the Perfect Auxiliaries be/have in Middle English Texts
Autorzy:
Zdziera, Katarzyna Alicja
Powiązania:
https://bibliotekanauki.pl/articles/888689.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
Middle English
auxiliaries
distribution
Opis:
Like many Germanic languages, English has developed specific periphrastic constructions to express perfective meaning. Before being fully grammaticalized in the 16th century, they were used occasionally in Old and Middle English as complex verb phrases with either habban ‘to have’ or beon/wesan ‘to be’ acting as auxiliary verbs. By the Modern English period, forms created with be disappeared from the language and were almost completely replaced by forms with have, a process which did not occur, for instance, in German. As the data on this development are quite scarce, a relatively simple model is assumed with a steady diachronic progress towards the system established in Modern English, a model which disregards synchronic variation. This paper attempts to investigate the distribution of the perfective constructions with be and have, especially in the 15th century texts and to identify the main factors accounting for diff erences in their usage. Instead of taking into account only the diachronic aspect of the development described, the present study focuses mainly on investigating the synchronic variation in the auxiliaries used with the two most frequent verbs of motion, namely come and go in the perfective meaning.
Źródło:
Anglica. An International Journal of English Studies; 2018, 27/2; 33-46
0860-5734
Pojawia się w:
Anglica. An International Journal of English Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interval shrinkage estimation of the parameter of exponential distribution in the presence of outliers under loss functions
Autorzy:
Nasiri, Parviz
Powiązania:
https://bibliotekanauki.pl/articles/2108120.pdf
Data publikacji:
2022-09-14
Wydawca:
Główny Urząd Statystyczny
Tematy:
interval information
mean square error
shrinkage estimator
exponential distribution
uniform distribution
outliers
Linex loss function
Opis:
In this paper, we studied estimators based on an interval shrinkage with equal weights point shrinkage estimators for all individual target points θ¯ ∈ (θ0, θ1) for exponentially distributed observations in the presence of outliers drawn from a uniform distribution. Estimators obtained from both shrinkage and interval shrinkage were compared, showing that the estimators obtained via the interval shrinkage method perform better. Symmetric and asymmetric loss functions were also used to calculate the estimators. Finally, a numerical study and illustrative examples were provided to describe the results.
Źródło:
Statistics in Transition new series; 2022, 23, 3; 65-78
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Half-Logistic Odd Power Generalized Weibull-G Family of Distributions
Autorzy:
Peter, Peter O.
Chipepa, Fastel
Oluyede, Broderick
Makubate, Boikanyo
Powiązania:
https://bibliotekanauki.pl/articles/2119924.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
half logistic distribution
half logistic-G distribution
Weibull generalized-G distribution
maximum likelihood estimation
Opis:
We develop and study in detail a new family of distributions called Half- logistic Odd Power Generalized Weibull-G (HLOPGW-G) distribution, which is a linear combination of the exponentiated-G family of distributions. From the special cases considered, the model can fit heavy tailed data and has non-monotonic hazard rate functions. We further assess and demonstrate the performance of this family of distributions via simulation experiments. Real data examples are given to demonstrate the applicability of the proposed model compared to several other existing models.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2022, 1; 1-35
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of investment opportunities for distribution center location in Poland
Autorzy:
Karcz, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/27313571.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
assessment of investment in logistics
distribution centers
distribution center location analysis
investments in logistics
location for distribution center
ocena inwestycji w logistykę
centra dystrybucyjne
analiza lokalizacji centrum dystrybucyjnego
inwestycje w logistykę
miejsce na centrum dystrybucyjne
Opis:
Purpose: Main reason to write the paper is to show one of possible models in market research for choosing the macro area for location of distribution center. There is lack of such researches in the research studies so it’s worth to show different perspectives that are also used in real logistics business. Design/methodology/approach: The approach to the topic is to present and introduce the theoretical value of the topic with an analysis of the literature to then conduct empirical research. Main methods used for research were Mixed Methods between Observation, Secondary Data Analysis and Experiments. The goals of the article have been achieved through the scientific study conducted. Findings: The main results developed in the article are concerned with measuring the attractiveness of Poland's regions for investment in creating a goods distribution center for a logistics operator. The analysis model can be used secondarily to analyze other, arbitrarily selected regions. Research limitations/implications: The research conducted in the course of preparing the publication addresses several key factors, selected by the author. Further research may consider other aspects, factors or may be expanded to include additional factors to deepen the analysis. The research may also be part of the contribution or research part to the creation of a universal model for distribution center location choices. Practical implications: (if applicable) What outcomes and implications for practice, applications and consequences are identified? How will the research impact upon the business or enterprise? What changes to practice should be made as a result of this research? What is the commercial or economic impact? Not all papers will have practical implications. Social implications: The research is 100% focused on practical use and application. For logistics operators looking to expand their business, especially in Poland, it provides a starting point for analysis and strategic decision-making within the location of their base of distribution facilities. A limitation is the access to data on demographics and especially considering the level of earnings of operational employees, which is difficult to estimate for a general model due to the lack of specific business assumptions about the scale of operations. Originality/value: The novelty of the article and the study is the attempt to approach universalization in terms of identifying factors and aspects that are relevant and can be applied to the selection of locations for freely chosen and compared regions, not only the level of provinces as in the case of the study developed in the article.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2022, 160; 287--299
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Centrum dystrybucji jako ogniwo kompensacji zakłóceń z perspektywy sieci dystrybucji
Distribution centre as a cell of disruptions compensation from the perspective of distribution network
Autorzy:
Kmiecik, M.
Powiązania:
https://bibliotekanauki.pl/articles/326865.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
distribution centre
warehouse management
distribution network
TOWS/SWOT analysis
disruptions
centrum dystrybucji
gospodarka magazynowa
sieć dystrybucji
analiza TOWS/SWOT
zakłócenia
Opis:
Warehouse management is a crucial element in daily basis in all distribution centres. The article goal focuses on showing the role of distribution centre warehouse’s management in disruptions compensation and eliminate their effects in the perspective of distribution centre. Additionally, after showing activities, which allow to disruptions compensation, the idea of changing in warehousing processes will be analysing by TOWS/SWOT. It will show strengths, weaknesses, opportunities and threats of showing improvements. In the end, the article will show the best strategy, which enterprise should choose during improvement the warehouse processes.
Istotnym elementem w funkcjonowaniu każdego centrum dystrybucji jest gospodarka magazynowa. Cel niniejszego artykułu skupia się na wskazaniu roli procesów zachodzących w gospodarce magazynowej centrum dystrybucji w kompensacji zakłóceń oraz eliminacji ich skutków z perspektywy całej sieci dystrybucji. Dodatkowo, po wskazaniu czynności, dzięki którym możliwa jest kompensacja zakłóceń, idea zmian w gospodarce magazynowej zostanie poddana analizie TOWS/SWOT, która ukaże słabe, mocne strony oraz szanse i zagrożenia wprowadzania zaproponowanych usprawnień. Zostanie również ukazana strategia, jaką powinno przyjąć przedsiębiorstwo podczas ich wdrażania.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2018, 121; 175-187
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie uogólnionego rozkładu gamma do generowania tablicy dwudzielczej
Using the generalized gamma distribution to generate contingency tables
Autorzy:
Sulewski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/433910.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
generation of two-way tables
generalized gamma distribution
generalized gamma random value
exponential distribution
Opis:
The article is devoted to the generation of two-way table contents using the generalized gamma distribution (GG). It describes the generalized gamma random number generator and how to create a two-way table by means of the empirical distribution function and theoretical exponential distribution, which is a special case of GG.
Źródło:
Śląski Przegląd Statystyczny; 2014, 12(18); 339-348
1644-6739
Pojawia się w:
Śląski Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On regular temperature distribution
Autorzy:
Szmydt, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1386176.pdf
Data publikacji:
1972
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Studia Mathematica; 1972, 44, 4; 309-314
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multicriteria Evaluation of Designing Transportation System within Distribution Sub-Systems
Autorzy:
Pyza, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/503912.pdf
Data publikacji:
2010
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
Transportation system
transportation services schedule distribution system
multicriteria evaluation
Opis:
The paper presents the problem of designing transportation system for goods distribution with usage of multicriteria decision supporting method. The general characteristic of transportation system as an element of distribution system was presented. Moreover, the distribution system was identified as a one of the most important elements of supply chain which aims in making products available in place and time matching client needs. In further part the problem was mathematically formalized to optimization task. Analyzing the problems of modeling conveying system forces claim that decisions taken within area of transport organization consist in solving complex decision problems. Complexity follows from the demand of best decision according to many aspects. Solution must ensure othe best realization of all partial criteria (aims) taken into account during decision making process. The article contains characteristics of methods of multicriteria evaluation with regard to short literature review. The emphasis was placed on ELEKTRA and MAJA methods which can be applied in the evaluation of complex decision problems in transportation systems. The last part of the article is verifies of presented issues by tneans of numerical experiment.
Źródło:
Logistics and Transport; 2010, 10, 1; 25-34
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some characterizations of a two-parameter Xgamma distribution
Autorzy:
Shakil, M.
Ahsanullah, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031018.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Characterizations
Order Statistics
Record Values
Truncated Moment
Xgamma distribution
Opis:
The objective of this paper is establish some new characterization results of a two-parameter Xgamma distribution. We have first established our proposed characterization results by taking a relation between left truncated moment and failure rate function. Then, we have characterized the two-parameter Xgamma distribution by taking a relation between right truncated moment and reversed failure rate function. Finally, we have characterized it by order statistics and record values.
Źródło:
World Scientific News; 2020, 149; 1-22
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hankel convolution on distribution spaces with exponential growth
Autorzy:
J. Betancor, Jorge
Rodríguez-Mesa, Lourdes
Powiązania:
https://bibliotekanauki.pl/articles/1221085.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Hankel transform
Hankel convolution
distribution
Bessel functions
Opis:
We study the Hankel transformation and Hankel convolution on spaces of distributions with exponential growth.
Źródło:
Studia Mathematica; 1996, 121, 1; 35-52
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing 65 equity indexes for normal distribution of returns
Autorzy:
Borowski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/522104.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Capital market efficiency
Distribution of rate of returns
Financial markets
Opis:
Aim/purpose – The primary aim of the paper is to verify the hypothesis on the normal distributions of 65 stock index returns, while the secondary aims are to examine normal distributions for specific years (for six indexes) and for bull and bear markets (for DJIA), demonstrate that the distribution of rates of return for individual indexes can be normal in short time intervals, and then rank analyzed indexes according to the proximity of the distribution of their rates of return to the normal distribution. Design/methodology/approach – The research sample consists of the value of 65 stock indexes from various time intervals. The sample includes both developed markets and emerging markets. The following rates of return were tested for the normality of the rat e of return distribution: close -close, open -open, open -close and overnight, which were calculated for daily, weekly, monthly, quarterly and yearly data. Statistical tests of di f- ferent properties and forces were used: Jarque – Bera (JB), Lilliefors (L), Crame r von Mises (CVM), Watson (W), Anderson – Darling (AD). In the case of six indexes of d e- veloped markets (DJIA, SP500, DAX, CAC40, FTSE250 and NIKKEI225), normality tests of rates distribution were calculated for individual years 2013 -2016 (daily data). In case of the DJIA index, the normality tests of the distribution of returns for individual bull and bear markets were analyzed (daily data, rates of return close -close). In the last part of the paper the analyzed indexes were ranked due to the convergence of their return to normal distribution with the use of the following tests: Jarque – Bera, Shapiro – Wilk and D’Agostino -Pearson. Findings – The distribution of daily and weekly returns of equity indexes is not a normal distribution for all analyzed rates of ret urn. For quarterly and annual data compression the smallest number when there were no reasons to reject the null hypothesis was o b- served for overnight returns compared to close -close, open -close and open -open returns. For the daily, weekly and monthly over night rates of return, the null hypothesis was rejected for all analyzed indexes. The fo llowing general conclusion can be formulated: the higher the data compression (from dail y to yearly), the fewer rejections of H 0 hy- pothesis. The distribution of daily returns can be normal only in given (rather short) time intervals, e.g., particular years or up or do wn waves (bull and bear markets). The posi- tion of the index in the ranking is not depende nt on the date of its first publication, and hence on the number of rates of return possible to calculate for analyzed index, but only on the distribution of its rates of return. Research implications/limitations – The main limitations of the obtained results are different time horizons of each of the analyzed indexes (from the first date in a data base until 30.06.2017). The major part of the retu rns of the analyzed indexes differs from the normal distribution, which question the possi bility of unreflective implementation in practice of economic such models as CAPM and its derivatives, Black–Scholes options valuation, portfolio theory and efficient market hypothesis, especially in long time horizons. Contribution/value/contribution – The contribution of this paper is verification of the statistical hypothesis regarding normal dist ribution of rates of return: (1) other than close-close, i.e. open-open, open-close and ove rnight with the use of various statistical tests, various data compression (daily, w eekly, monthly, quarterly, yearly) for 65 in- dexes, (2) for six stock exchange indexes in each of the years from the period of 2013- 2016 (daily data) and (3) for individual up and down waves for the DJIA index (daily data). In addition, other papers focused only on one or two statistical tests, while five different tests were implemented in this paper. This paper is the first to create a ranking of stock market indexes due to the normal distribution.
Źródło:
Journal of Economics and Management; 2018, 34; 5-38
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transmuted Kumaraswamy Distribution
Autorzy:
Khan, Muhammad Shuaib
King, Robert
Hudson, Irene Lena
Powiązania:
https://bibliotekanauki.pl/articles/973543.pdf
Data publikacji:
2016
Wydawca:
Główny Urząd Statystyczny
Tematy:
Kumaraswamy distribution
moments
order statistics
parameter estimation
maximum likelihood estimation
Opis:
The Kumaraswamy distribution is the most widely applied statistical distribution in hydrological problems and many natural phenomena. We propose a generalization of the Kumaraswamy distribution referred to as the transmuted Kumaraswamy (T K w) distribution. The new transmuted distribution is developed using the quadratic rank transmutation map studied by Shaw et al. (2009). A comprehensive account of the mathematical properties of the new distribution is provided. Explicit expressions are derived for the moments, moment generating function, entropy, mean deviation, Bonferroni and Lorenz curves, and formulated moments for order statistics. The T K w distribution parameters are estimated by using the method of maximum likelihood. Monte Carlo simulation is performed in order to investigate the performance of MLEs. The flood data and HIV/ AIDS data applications illustrate the usefulness of the proposed model.
Źródło:
Statistics in Transition new series; 2016, 17, 2; 183-210
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of droplet size distribution in selected nebulizers
Autorzy:
Dobrowolska, Katarzyna
Sosnowski, Tomasz R.
Powiązania:
https://bibliotekanauki.pl/articles/1450682.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
spraying
liquid atomization
aerosol dynamics
particle size distribution
Opis:
Nebulizers are the class of atomizing devices used to disperse liquids to fine droplets. They found their application in selected technological (typically: small-scale) processes, but their most common use is related to the generation of medicinal aerosols for inhalation. In this work we present the experimental data on the evolution of the size distributions of water droplets generated by two nebulizers (pneumatic and vibrating-mesh) as a result of aerosol mixing with the ambient air. Such a process reflects the real situation, where aerosol emitted from a nebulizer is diluted by additional air sucked by a patient during inhalation. Droplet size distribution was determined by laser diffraction, and these results were further discussed including the data of the aerosol velocity measured by the Laser Doppler Anemometry (LDA). It was demonstrated – as expected - that dilution with the ambient air with moderate humidity results in the intense evaporation of the smallest droplets. However, larger droplet may be saved to a different degree depending on the velocity and geometry of the aerosol cloud emitted from the nebulizer, and on the volume of the diluting air. These parameters have an influence on the droplet coalescence which is another process shaping the droplet size distribution in the studied conditions. The results can deepen the understanding of the mist dynamics which can be applied in various fields of colloidal science and technology.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 32-40
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł

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