Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "correlation coefficient" wg kryterium: Temat

  Lista filtrów

Dostawca treści

Wyrównaj
Wyświetlanie 1-15 z 85
Tytuł:
A note on correlation coefficient between random events
Autorzy:
Stępniak, Czesław
Powiązania:
https://bibliotekanauki.pl/articles/729754.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
correlation coefficient between random events
correlation coefficient for random variables
synergy phenomenon
Opis:
Correlation coefficient is a well known measure of (linear) dependence between random variables. In his textbook published in 1980 L.T. Kubik introduced an analogue of such measure for random events A and B and studied its basic properties. We reveal that this measure reduces to the usual correlation coefficient between the indicator functions of A and B. In consequence the resuts by Kubik are obtained and strenghted directly. This is essential because the textbook is recommended by many universities in Poland.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2015, 35, 1-2; 57-60
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On two confidence intervals for the correlation coefficient
O dwóch przedziałach ufności dla współczynnika korelacji
Autorzy:
Tarasinska, J.
Powiązania:
https://bibliotekanauki.pl/articles/9709.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Katedra Zastosowań Matematyki i Informatyki
Tematy:
correlation coefficient
interval estimation
coverage probability
confidence interval length
Źródło:
Colloquium Biometricum; 2008, 38
1896-7701
Pojawia się w:
Colloquium Biometricum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
K voprosu planirovanija ehksperimenta na baze prikladnogo paketa
The question of planning experiment on the basis of application package excel
Autorzy:
Sinjaeva, O.
Zavgorodnijj, A.
Obykhvost, A.
Powiązania:
https://bibliotekanauki.pl/articles/77975.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
mathematical model
autocorrelation
computer programme
correlation coefficient
planning experiment
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 7
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weighting in the template matching
Wagi dopasowywania szablonów
Autorzy:
Kalina, Jan
Powiązania:
https://bibliotekanauki.pl/articles/907031.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Image analysis
locating landmarks
correlation coefficient
robust nonparametric discrimination
Opis:
In the area of image analysis of templates, we have proposed and implemented a method for locating landmarks in 2D-images of faces. It uses the weighted correlation coefficient as a similarity measure between the template and the image. The weights are selected in the optimal way to improve the discrimination of parts of the image which correspond to the template from those which do not. The method does not use specific properties of faces.
Zaproponowaliśmy i zastosowaliśmy metodę lokalizacji punktów orientacyjnych obrazów dwuwymiarowych. Podstawą jej jest użycie ważonego współczynnika korelacji pomiędzy szablonem a obrazem. Wagi są wybierane w sposób optymalny dla poprawy rozróżnienia części obrazu, które odpowiadają szablonowi od tych które nie odpowiadają. Metoda nie odwołuje się do specyficznych własności twarzy.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2008, 216
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podatkowy kontekst długu sektora general government
Autorzy:
Ziółkowska, Wiesława
Powiązania:
https://bibliotekanauki.pl/articles/630068.pdf
Data publikacji:
2015
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
taxes, deficit, general government sector debt, Laffer curve, correlation,Pearson correlation coefficient
Opis:
The purpose of the paper is to present a retrospective analysis of taxation in thecontext of public debt in the years 1995–2013. The author attempts to verify thehypothesis according to which there is correlation of various degrees of significanceand various directions between taxes and the debt of the general government sectorof the EU Member States. The study of those correlations was preceded by ananalysis that indicated tendencies to diminish tax burdens which was a result of„copying” tax policy and simultaneously increase sources and change character ofthe causes of increasing public debt. Out of 25 states where the correlation betweentwo major groups of taxes in GDP and public debt was proved, in 15 states thedimension of the interdependence was positive, while in the remaining 10 – negative.In the first group the lower (higher) tax burdens were, the lower (higher) thepublic debt was. Therefore it might be inferred that the tax rate below or abovewhich the budget income moves was not exceeded. As far as the remaining 10countries are concerned (those with negative correlation), it might be suggestedthat the critical point of decreasing (increasing) taxes below (above) which theincome drops was exceeded. Both the descriptive analysis of the indices and statisticalexamination make it possible to verify the adopted hypothesis positively,indicating simultaneously the necessity for further examination.
Źródło:
Kwartalnik Kolegium Ekonomiczno-Społecznego Studia i Prace; 2015, 3, 4; 27-41
2082-0976
Pojawia się w:
Kwartalnik Kolegium Ekonomiczno-Społecznego Studia i Prace
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wydajności pracy na zatrudnienie w polskim przemyśle przetwórczym
Labor Productivity and Its Impact on Employment in Poland’s Manufacturing Sector
Autorzy:
Bartosik, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/574491.pdf
Data publikacji:
2010-08-31
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Tematy:
labor productivity
employment
industry
Pearson correlation coefficient
total factor productivity
Opis:
The paper analyzes the influence of labor productivity on employment in various branches of Poland’s manufacturing sector in 1993-2007. The author attempts to determine if changes in labor productivity and employment were substitutive or complementary in nature and whether the relationship between these processes was stable or liable to change. The analysis, using the Pearsoncorrelation coefficient (which measures the strength of the linear relationship between two variables), shows that the relationship between labor productivity and employment turned from substitutive to complementary and that an improvement in labor productivity had no distinct impact on employment in the short term, while in the long term it promoted an increase in employment. The relationship between labor productivity and employment varied because the ways in which labor productivity improved tended to change. In the 1990s institutional changes led to an improvement in labor productivity, including the introduction of market economy mechanisms, privatization and greater competition in the wake of opening the economy. At the time the simplest method was used: employment reductions. With time this option petered out and companies began to improve labor productivity (and competitiveness) by investing, modernizing their fixed assets, and introducing product rather than process innovations. This had a favorable influence on employment, the author says.
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2010, 241, 7-8; 1-19
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel fault diagnosis method for marine blower with vibration signals
Autorzy:
Yan, Guohua
Hu, Yihuai
Jiang, Jiawei
Powiązania:
https://bibliotekanauki.pl/articles/32899234.pdf
Data publikacji:
2022
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
fault diagnosis
marine blower
EEMD
correlation coefficient
AR spectrum
BPNN
Opis:
The vibration signals on marine blowers are non-linear and non-stationary. In addition, the equipment in marine engine room is numerous and affects each other, which makes it difficult to extract fault features of vibration signals in the time domain. This paper proposes a fault diagnosis method based on the combination of Ensemble Empirical Mode Decomposition (EEMD), an Autoregressive model (AR model) and the correlation coefficient method. Firstly, a series of Intrinsic Mode Function (IMF) components were obtained after the vibration signal was decomposed by EEMD. Secondly, effective IMF components were selected by the correlation coefficient method. AR models were established and the power spectrum was analysed. It was verified that blower failure can be accurately diagnosed. In addition, an intelligent diagnosis method was proposed based on the combination of EEMD energy and a Back Propagation Neural Network (BPNN), with a correlation coefficient method to get effective IMF components, and the energy components were calculated, normalised as a feature vector. Finally, the feature vector was sent to the BPNN for training and state recognition. The results indicated that the EEMD-BPNN intelligent fault diagnosis method is suitable for higly accurate fault diagnosis of marine blowers.
Źródło:
Polish Maritime Research; 2022, 2; 77-86
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient Phantom Source Widening
Autorzy:
Zotter, F.
Frank, M.
Powiązania:
https://bibliotekanauki.pl/articles/177701.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
source widening
phantom source
decorrelation
IACC
inter-aural cross correlation coefficient
Opis:
We present a highly efficient filter structure to create power-complementary filter pairs for phantom source widening. It either introduces frequency-dependent phase or amplitude differences in a pair of loudspeaker signals. We evaluate how the perceptual effect is influenced by off-center listening positions in a standard ±30o loudspeaker setup. The evaluation of the phantom source widening effect is based on measurements of the inter-aural cross-correlation coefficient (IACC), which is justified by its pronounced correlation to the perceived phantom source width in prior listening test results.
Źródło:
Archives of Acoustics; 2013, 38, 1; 27-37
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of surface soil moisture from SMOS satellite and ground measurements
Autorzy:
Usowicz, B.
Marczewski, W.
Usowicz, J.B.
Lukowski, M.I.
Lipiec, J.
Powiązania:
https://bibliotekanauki.pl/articles/25959.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
comparison
soil surface
soil moisture
SMOS satellite
ground
measurement
correlation coefficient
Opis:
Soil moisture datasets at various scales are needed for sustainable land use and water management. The aim of this study was to compare soil moisture ocean salinity satellite and in situ soil moisture data for the Podlasie and Polesie regions in Eastern Poland. Both regions have similar climatic and topo- graphic conditions but are different in land use, vegetation, and soil cover. The test sites were located on agricultural fields on sandy soils and natural vegetation on marshy soils that prevail in the Podlasie and Polesie regions, respectively. The soil moisture ocean salinity soil moisture data were obtained from radiometric measurements (1.4 GHz) and the ground soil moisture from sensors at a depth of 5 cm during the years 2010-2011. In general, temporal patterns of soil moisture from both satellite and ground measurements followed the rainfall trend. The regression coeffi- cients, Bland-Altman analysis, concordance correlation coefficient, and total deviation index showed that the agreement between ground and soil moisture ocean salinity derived soil moisture data is better for the Podlasie than the Polesie region. The lower agre- ement in Polesie was attributed mostly to the presence of the widespread natural vegetation on the wetter marsh soil along with minor contribution of agriculturally used drier coarse-textured soils.
Źródło:
International Agrophysics; 2014, 28, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlations among morphological traits of sweet chestnut (Castanea sativa Miller) from Bosnia and Herzegovina
Autorzy:
Tug, A.
Hodzic, M.M.
Ballian, D.
Powiązania:
https://bibliotekanauki.pl/articles/2106657.pdf
Data publikacji:
2022
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
correlation coefficient
morphological trait
sweet chestnut
Castanea sativa
Bosnia and Herzegovina
Opis:
Sweet chestnut forests in Bosnia and Herzegovina are underrepresented in the total forest fund, and their area is declining today. The research aims to determine the correlation relations of morphological traits of chestnut leaves, fruit and cupule in the population of Bosnian Krajina (northwestern Bosnia and Herzegovina) to undertake selection and breeding activities. Eleven traits of fruits, leaves and cupules were measured, seven assessed and six calculated. A mutual correlation for the researched traits was calculated using the Pearson correlation coefficient r. When the fruit traits and cupule traits were compared, the needle length showed a statistically significant correlation with most of the fruit traits. The traits of the number of fruits in the cupule and needle length had a statistically significant correlation coefficient with leaf blade width and leaf petiole length. The correlated traits can be distinguished as important for further selection and breeding of sweet chestnuts. The research results indicate that the genetic material of sweet chestnut is a rich source of genetic diversity and can be used in selection to obtain new varieties and cultivars in Bosnia and Herzegovina and for the protection of the indigenous gene pool.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2022, 64, 1; 49-57
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elimination of characteristics concerning the performance of open-ended equity funds using PCA
Autorzy:
Żebrowska-Suchodolska, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/19931878.pdf
Data publikacji:
2023-09-08
Wydawca:
Główny Urząd Statystyczny
Tematy:
PCA
investment funds
decision-making
tau-Kendall correlation coefficient
investment efficiency
Opis:
From an investor's point of view, the appropriate selection of a fund is an important issue. When making such a choice, many elements should be considered. These include not only the fund's rate of return or its risk, but also the comparison of the fund's results with an appropriate benchmark. The aim of the research was to apply principal component analysis (PCA) to reduce the dimension of the indicators that help the investor in selecting a fund. The subject of the study was 15 equity funds that had been on the Polish market for many years. The research showed that it is possible to reduce the primary variables to two dimensions.
Źródło:
Statistics in Transition new series; 2023, 24, 4; 153-168
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CZYNNIKI RÓŻNICUJĄCE SPOŻYCIE WYROBÓW SPIRYTUSOWYCH W POLSKICH GOSPODARSTWACH DOMOWYCH W LATACH 1999 - 2008
FACTORS INFLUENCING ALCOHOL CONSUMPTION IN POLISH HOUSEHOLDS IN 1999-2008
Autorzy:
Zmarzłowski, Krzysztof
Koszela, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/453762.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
konsumpcja wyrobów spirytusowych
gradacyjna analiza danych
polskie gospodarstwa domowe
współczynnik Pearsona
współczynnik Spearmana
Alcohol consumption
Grade data analysis
Polish households
Pearson correlation coefficient
Spearman rank correlation coefficient
Opis:
Celem niniejszej pracy było wyodrębnienie czynników różnicujących spożycie wyrobów spirytusowych w polskich gospodarstwach domowych w latach 1999-2008. W pracy użyto metod gradacyjnej analizy danych oraz klasycznych metod badania siły zależności zjawisk.
The main objective of this research was to determine factors that influenced consumption of alcoholic beverage in Polish households in 1999-2008. During the course of study authors applied classic methods of correlation and modern methods of grade data analysis.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2013, 14, 3; 101-112
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of laser priming on canola yield and its components under salt stress
Autorzy:
Mohammadi, S.K.
Shekari, F.
Fotovat, R.
Darudi, A.
Powiązania:
https://bibliotekanauki.pl/articles/26380.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
laser irradiation
canola
yield
yield component
salt stress
salinity
seed
correlation coefficient
Opis:
The effect of laser priming at different irradiation times on canola yield and its components under saline conditions were investigated. The results showed that laser priming had a positive effect on yield and its components and caused yield increase under saline conditions. Increase in salt levels had a negative and significant effect on seed yield, number of seeds per pod, number of pod per plant, pod length and plant height. The results showed that 45-min laser priming had the strongest effect on yield and yield components and reduced significantly the adverse effects of salinity.By contrast, laser radiation applied for 60 and 75 min, resulted in a dramatic decrease in yield and its components. Correlation coefficients between the attributes showed that canola yield had a positive and significant correlation with plant height, number of seeds, pod per main branch and lateral branches, length of pod and number of lateral branches. Effects of laser and salinity were significant on lateral branch pod length but not on main branch pods.
Źródło:
International Agrophysics; 2012, 26, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic stability and spatial heterogeneity in the individual-based modelling of a Lotka-Volterra gas
Autorzy:
Waniewski, J.
Jędruch, W.
Żołek, N. S.
Powiązania:
https://bibliotekanauki.pl/articles/907374.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równanie Lotka-Volterra
entropia
współczynnik korelacji
predator-prey system
entropy
correlation coefficient
Opis:
Computer simulation of a few thousands of particles moving (approximately) according to the energy and momentum conservation laws on a tessellation of 800 x 800 squares in discrete time steps and interacting according to the predator-prey scheme is analyzed. The population dynamics are described by the basic Lotka-Volterra interactions (multiplication of preys, predation and multiplication of predators, death of predators), but the spatial effects result in differences between the system evolution and the mathematical description by the Lotka-Volterra equations. The spatial patterns were evaluated using entropy and a cross correlation coefficient for the spatial distribution of both populations. In some simulations the system oscillated with variable amplitude but rather stable period, but the particle distribution departed from the (quasi) homogeneous state and did not return to it. The distribution entropy oscillated in the same rhythm as the population, but its value was smaller than in the initial homogeneous state. The cross correlation coefficient oscillated between positive and negative values. Its average value depended on the space scale applied for its evaluation with the negative values on the small scale (separation of preys from predators) and the positive values on the large scale (aggregation of both populations). The stability of such oscillation patterns was based on a balance of the population parameters and particle mobility. The increased mobility (particle mixing) resulted in unstable oscillations with high amplitude, sustained homogeneity of the particle distribution, and final extinction of one or both populations.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2004, 14, 2; 139-147
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the influence of infrastructural and economic factors on the volume of freight transport on railway lines in Poland
Autorzy:
Kamiński, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1841155.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
freight transport
correlation coefficient
railway transport
transport kolejowy
transport towarowy
współczynnik korelacji
Opis:
This article assesses the effect of factors, such as the number of sidings, the number of station holds, and the occurrence of transit traffic on the volume of freight transport on railway lines in Poland. The volume of freight transport on a railway lin as expressed by the operational work done by freight trains running on this line and the transported freight mass by them. Most often the effect of factors affecting on the volume of transport is assessed by a team of experts. In this analysis, calculations of partial correlation coefficients were performed. The calculations showed that there is a clear relationship between the volume of freight transport and the number of sidings on the line and the occurrence of transit traffic. Based on the obtained partial correlation coefficients, weights corresponding to the effects of individual factors on the volume of freight transport were calculated. The use of these weights for further analysis will avoid the subjective expert assessments that have been used in this type of analysis so far.
Źródło:
Transport Problems; 2020, 15, 4, cz. 2; 167-178
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 85

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies