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Tytuł:
The legal situation and practical application of the general average
Autorzy:
Sulewska, K.
Powiązania:
https://bibliotekanauki.pl/articles/111460.pdf
Data publikacji:
2014
Wydawca:
Instytut Morski w Gdańsku
Tematy:
general average
average adjustment proceedings
average adjustment
average adjuster
Opis:
The aim of this article is to discuss issues related to average adjustment proceedings, the status of the average adjuster in the national legal order, to discuss the generally accepted principles of general average settlement and to demonstrate the usefulness of these institutions in modern commercial shipping.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2014, 29, 1; 1-8
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Średni ciężar cząsteczkowy chondrytu Jezersko (H4). Promień i objętość atomu i cząsteczki chondrytu
Average molecular weight of Jezersko H4 chondrite. Radius and volume of atom and molecule of chondrite
Autorzy:
Szurgot, Marian
Powiązania:
https://bibliotekanauki.pl/articles/1033154.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Jezersko chondrite
average molecular weight
average radius of atom
average radius of molecule
Opis:
Average molecular weight and average atomic number of molecule of Jezersko ordinary chondrite (H4 S2(3) W2, find in 1992 in Slovenia) have been calculated using literature data on chemical composition of the meteorite (Miler et al. 2014). It was shown that Jezersko’s = 55.58, = 27.21, and ratio / = 2.043 for composition without water. Jezersko’s silicates shown the values: = 54.08, = 21.77, and / = 2.484. Volume and radius of average Jezersko molecule, and of atom have been also determined. It was calculated that the average volume of Jezersko’s molecule Vmol = 2.515·10–29 m3, and average radius of Jezersko’s molecule Rmol = 181.5 pm. Average volume of the Jezersko’s atom Vatom = 1.117·10–29 m3, and average radius of Jezersko’s atom: Ratom = 138.5 pm. Ratio of average Jezersko’s volume of molecule to atom volume: 2.25, and ratio of radius of molecule to radius of atom: 1.31. Number of atoms in Jezersko meteorite average molecule Nmol = /Amean = /Zmean = 2.25, and for Jezersko’s silicates Nsimol = 2.48.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2020, 11; 98-109
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wariancji wyniku cyfrowej filtracji uśredniającej
Variance evaluation of the result of averaging digital filtration
Autorzy:
Domańska, A.
Powiązania:
https://bibliotekanauki.pl/articles/154915.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
ruchoma średnia
uśrednianie koherentne
wariancja średniej
skorelowane dane
moving average
cumulating average
variance of average
correlated data
Opis:
Artykuł dotyczy cyfrowego uśredniania metodą ruchomej średniej oraz metodą z kumulacją, stosowanego w celu eliminacji lub redukcji losowego składnika stanowiącego zakłócenie wielkości deterministycznej. Podano zależność określającą wariancję wyniku uśredniania każdą z metod, co umożliwia ocenę jego niepewności. Odmienna specyfika metod przekłada się na odmienną postać zależności określającej wariancję i odmienne warunki, przy których można osiągać ekstremalny zysk z uśredniania.
The paper concerns digital averaging performed with the use of the moving average method and the cumulative method. This type of averaging is applied in order to eliminate or reduce the random component, being a disturbance of the deterministic quantity. Moreover, the paper presents the dependence determining the variance of the averaging result with the use of each of these methods, which makes it possible to estimate the uncertainty of the result. A different character of each of the methods implies a different form of the dependence determining the variance as well as different conditions with which an extreme profit can be achieved on the averaging. MAV and CAV are digital averaging algorithms of the value of dependent from the time (signals). The algorithm MAV is fitted for averaging of aperiodic and periodic signals. The algorithm CAV is fitted for averaging of periodic signals or repeatable signals at multiples to their gaining. The filtration MAV influences reductively on the variance of the noise and on the variance of the primary signal, however CAV reduces only the variance of the noise, not changing the variance of the primary signal. The use of the filtration MAV and CAV promotes better repeatability of results, if are estimated from samples of the average signal. Both algorithms are realizations of digital filters of the type FIR. In the case MAV this is the single low-pass filter. In the case CAV this is "the group" of simultaneously working low-pass filters - every in length equal of numerous of the collection of the repetition and filters is as many as of samples counts the single repetition. Fundamental difference between MAV and CAV consists in the manner of the choice of the collection of samples (undergo averaging) for the purpose of the determination of the single value of the average signal. In MAV this are adjacent samples from the single registration of the signal. In CAV this are the cophasal samples, every from other repetition. In the case of the averaging filtration of signals periodic or repeatable is more effective the algorithm CAV. However it is more time-consuming than the algorithm MAV.
Źródło:
Pomiary Automatyka Kontrola; 2009, R. 55, nr 9, 9; 750-753
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Average cost Markov control processes with weighted norms: value iteration
Autorzy:
Gordienko, Evgueni
Hernández-Lerma, Onésimo
Powiązania:
https://bibliotekanauki.pl/articles/1340319.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
average cost optimality equation
strong average optimality
(discrete-time) Markov control processes
long-run average cost
weighted norms
Opis:
This paper shows the convergence of the value iteration (or successive approximations) algorithm for average cost (AC) Markov control processes on Borel spaces, with possibly unbounded cost, under appropriate hypotheses on weighted norms for the cost function and the transition law. It is also shown that the aforementioned convergence implies strong forms of AC-optimality and the existence of forecast horizons.
Źródło:
Applicationes Mathematicae; 1995-1996, 23, 2; 219-237
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Air temperature variability on the silesian lowlands in the years 1957-2014
Autorzy:
Włodek, S.
Sikora, J.
Pawęska, K.
Biskupski, A.
Owsiak, Z.
Maga, J.
Powiązania:
https://bibliotekanauki.pl/articles/101462.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
average annual
average monthly air temperatures
number of days
Silesian Lowland
Opis:
Results of air temperature measurements in the 1957-2014 multi-annual period were analysed in the paper. The data originated from Jelcz-Laskowice locality situated in the south-western part of Poland, at the flat part of the Lower Silesia, on Silesian Lowlands. Average annual and monthly air temperatures and the number of days of thermal seasons duration were analysed. Trends of changes were set and extreme values of average monthly air temperatures were analysed. Mean annual air temperatures in the studied multi-annual period revealed a tendency to increase. Average monthly extreme values of the analysed factor revealed a similar direction of changes; however, more apparent changes occurred for the maximum values. Over the analysed period, average monthly air temperatures revealed a tendency to increase. The most serious changes occurred in July, slightly lesser in August, May and April. The number of days in the years 1957-2014 in the interval limited by the air temperature threshold values: 0°C, 5°C and 15°C was greatly diversified. Analysed results had a clear growing tendency for the summer, slightly lower for the spring, but evidently declining for the autumn.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2017, IV/3; 1877-1886
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
General average in Polish maritime law
Autorzy:
Szymankiewicz, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/135072.pdf
Data publikacji:
2019
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
general average
navigational safety
common maritime safety
marine accident
average adjuster
average adjustment
average procedure
York-Antwerp Rules
extraordinary expenditure/expense
sea peril
Comité Maritime International
Opis:
The law of general average is one of the oldest institutions in maritime law, which is still applicable in contemporary shipping. Although the role and function of general average have naturally changed throughout centuries of its history (the main reasons therefor being the popularization of maritime insurance, which evolved much later than the general average) and general average has been and is subject to criticism pointing to its anachronistic nature and redundancy in today’s maritime economic realities. However practice shows that general average continues to resist these accusations and is commonly used in the practice of maritime commercial trade. This article deals with the issue of general average in light of Polish maritime law regulations, the essence and specificity of these legislative solutions concerning the safety of shipping in Poland, and also gives examples of events that occurred at sea that permit the announcement of an act of the general average. This article also presents considerations with regard to arguments in favour of maintaining the institution of general average as a legal instrument used in shipping, as well as critical voices emphasizing the need to eliminate general average as an institution of maritime law aimed at distributing losses, incurred to avoid a common peril, to the participants of a maritime adventure.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 58 (130); 123-127
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MAKING MOST OF MOVING AVERAGE MODELS DURING STOCK MARKET ANALYSIS – SELECTION OF THE MODEL AND TIME PERIOD
Autorzy:
Letkowski, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/654255.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
investment
moving average models
Opis:
Technical analysis rely on assumption that analysis of past market performance provides possibility for proper stock price forecasting, in particular by identification of buy and sell signals. The article describe main moving average models: simple moving average, weighted moving average and exponential moving average and manner of theirs usage while constructing investment strategy on financial market. The article outlines possibilities and limitations of moving averages usage in investment practice. In addition empirical verification of moving averages is provided for selected polish shares forming index WIG20.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2014, 2, 301
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Average cost Markov control processes with weighted norms: existence of canonical policies
Autorzy:
Gordienko, Evgueni
Hernández-Lerma, Onésimo
Powiązania:
https://bibliotekanauki.pl/articles/1340317.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
discounted cost
average cost optimality equation
long run average cost
(discrete-time) Markov control processes
average cost optimality inequality
weighted norms
Opis:
This paper considers discrete-time Markov control processes on Borel spaces, with possibly unbounded costs, and the long run average cost (AC) criterion. Under appropriate hypotheses on weighted norms for the cost function and the transition law, the existence of solutions to the average cost optimality inequality and the average cost optimality equation are shown, which in turn yield the existence of AC-optimal and AC-canonical policies respectively.
Źródło:
Applicationes Mathematicae; 1995-1996, 23, 2; 199-218
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Best Time Series In-sample Model for Forecasting Nigeria Exchange Rate
Autorzy:
Gaddafi, Adamu Babali
Akpensuen, Shiaondo Henry
Shitu, Abdulrazaq Ahmed
Malle, Ahmad Atiku
Adamu, Muhammed
Bukar, Muhammad Goni
Powiązania:
https://bibliotekanauki.pl/articles/1031300.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ARIMA
Autoregressive Integrated Moving Average Model
Autoregressive Moving Average Model
Autoregressive models
Box-Jenkins Methodology
CBN
Exchange rate
Model
Moving Average Models
Nigeria
Opis:
In this work we considered data on official Nigeria exchange rates (Naira to British Pound sterling) from January 2003 to December 2019. Four competing models ARIMA (1, 1, 1), ARIMA (2, 1, 1), ARIMA (1, 1, 0) and ARIMA (1, 1, 2) were identified for the exchange rates series. Diagnostic analysis revealed that all the competing models adequately represent the exchange rate series. However, on the basis of out-of-sample model selection and evaluation ARIMA (1, 1, 1) was selected as the optimal model with minimum information criteria for the exchange rate series. A 24 months forecast indicates that the Naira will continue to depreciate. The policy implication of our study is that the Central Bank of Nigeria (CBN), should devalue the Naira in order to not only re-establish exchange rate stability but also encourage local manufacturing and encourage foreign capital inflows.
Źródło:
World Scientific News; 2021, 151; 45-63
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interpretation of Structural Parameters for Models with Spatial Autoregression
Autorzy:
Pietrzak, Michał Bernard
Powiązania:
https://bibliotekanauki.pl/articles/517218.pdf
Data publikacji:
2013
Wydawca:
Instytut Badań Gospodarczych
Tematy:
spatial econometrics
measures of average impact
Opis:
The main purpose of the article is to consider a important issue of spatial econometrics, which is a proper interpretation of structural parameters of econo-metric models with spatial autoregression. The problem will be considered basing on the example of the spatial SAR model. Another purpose of the article is to make an overview of measures of average spatial impact proposed by the subject litera-ture (see Lesage and Pace 2009). The analysis will include such measures as Aver-age Total Impact to an Observation, Average Total Impact from an Observation, Average Indirect Impact to an Observation, Average Indirect Impact from an Ob-servation and Average Direct Impact. Having considered the above issues, I will introduce a set of three original measures that allow the interpretation of the strength of the impact of the explanatory processes within the spatial SAR model, which take the forms of average direct impact, average indirect impact and average induced impact. The use of this set of measures will be illustrated with the example of the analysis of the unemployment rate in Poland. It must be emphasized that the presented set of measures may also be designated for other spatial models. With the knowledge of the empirical form of the model and of the spatial weight matrix, the set of measures introduced simplifies significantly the complex procedure of the interpretation of the structural parameters for spatial models to the use of merely three values.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2013, 8, 2; 129-155
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new hand dynamometer activforce isometric muscle activation on single joint muscle force of volleyball players
Autorzy:
Kahraman, Yeliz
Powiązania:
https://bibliotekanauki.pl/articles/34671012.pdf
Data publikacji:
2024-02-23
Wydawca:
Akademia Tarnowska
Tematy:
isometric force
peak
average
volleyball players
Opis:
Isometric muscle activation of single joint to volleyball players is critic on sport performance to produce potential muscle force, however isometric measurement limited in isokinetic muscle activity measurement of volleyball players. Indeed, hand dynamometers commonly use in various body isometric force. Professional volleyball players age 16.23 ± 0.59 yr, body mass 60.22 ± 4.64 kg, hight 1.69 ± 0.04 m participated to peak and average isometric force measurement over 8 week pre and post test. Accordingly, single joint muscle force production measurement of volleyball players tested on isometric muscle activation using a new hand dynamometer activforce 2. Isometric muscle activation tests consisted of 24 body region from upper and lower compartment. For this isometric muscle action test detected on peak force outcomes (SEM: 37.90; CV: 1.79) and average force outcomes (SEM: 33.62; CV: 1.84). The high isometric muscle action joint loading performing mechanical test application recommended on athletic population to using isometric potential high contraction model by strength training performance separately in-season and off-season measurement modeling. Conclusion, peak and average force production progressive isometric modeling of volleyball athletes worked to current sport–health condition. As out, conclusion must be advanced isometric force measurement proper work in sport-specific tasks. The proper isometric force must be repeat sport performance outcome in different sport modalities.
Źródło:
Health Promotion & Physical Activity; 2023, 25, 4; 22-30
2544-9117
Pojawia się w:
Health Promotion & Physical Activity
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algorytmy CAV i MAV filtracji sygnałów kwantowanych z ditherem
CAV and MAV algorithms of the filtration of signals quantized using dither
Autorzy:
Domańska, A.
Powiązania:
https://bibliotekanauki.pl/articles/154612.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
przetwornik A/C
dither
ruchoma średnia
uśrednianie metodą kumulacji
A/D converter
cumulating average
moving average
Opis:
Działania zmierzające do poprawy dokładności systemów pomiarowych z cyfrowym algorytmem pomiaru mają między innymi na celu poprawę dokładności konwersji analogowo-cyfrowej. Użyteczna okazala się metoda przetwarzania a-c z sygnałem ditherowym. Jej celem jest randomizacja błędu konwersji a-c i jego redukcja w wyniku filtracji. Filtracja może polegać na uśrednianiu wyników metodą kumulacji (cummulating average CAV także nazywane coherent averaging) albo na przetwarzaniu ich w filtrze typu "ruchoma średnia" (moving average MAV). W artykule przedstawino wyniki porównania skuteczności filtracji CAV i MAV w przypadku konwersji a-c sygnału periodycznego. Jako miarę skuteczności przyjęto wartość błędu operacji konwersji.
Actions leading to an improvement in the accuracy of measuring systems with digital measring algorithm are aimed, among others, at improving the accuracy of a-d conversion. One of the methods applied is a-d conversion with dither signal. Its aim is the randomization and reduction of a-d conversion error as the result of filtration. Filtration can consist in the averaging of results using the cummulating average CAV (called also coherent averaging), or in processing them in a filter of the moving average (MAV) type. The paper presents the results of comparing the efficiency of CAV and MAV filtration in the case of the a-d conversion of periodic signal. The value of the conversion errer was assurred as efficiency measure.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 119-122
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Econometric model for planning the industrial production
Autorzy:
Dima, I. C.
Grabara, J.
Kolcun, M.
Powiązania:
https://bibliotekanauki.pl/articles/122860.pdf
Data publikacji:
2013
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
discipline of waiting
average waiting time of the machines in the system
average number of machines
Opis:
In industrial practice, there are frequent cases when a performer randomly serves the machines at time intervals, which prevents the elements of carrying out the processing procedure from being predetermined. Situations of random interventions on the multiserved machines occur more often in textile industry on the spinning machines, looms, knitting machines, wire weaving and interlacing machines, etc.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 1; 11-20
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Average intensity of a partially coherent anomalous hollow beam propagating in underwater oceanic turbulence
Autorzy:
Liu, Dajun
Wang, Guiqiu
Zhong, Haiyang
Yin, Hongming
Wang, Yaochuan
Powiązania:
https://bibliotekanauki.pl/articles/175102.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
oceanic turbulence
average intensity
anomalous hollow beam
Opis:
Based on the extended Huygens–Fresnel principle, the cross-spectral density function of a partially coherent anomalous hollow beam (AHB) propagating in underwater oceanic turbulence has been derived. The average intensity of partially coherent AHB propagating in underwater oceanic turbulence has been calculated. The influences of coherence length and the strength of underwater oceanic turbulence on the spreading properties of partially coherent AHB are illustrated and analyzed using numerical examples. It is found that the partially coherent AHB with smaller coherence length and the partially coherent AHB propagating in stronger underwater oceanic turbulence will lose the initial beam profile and evolve into the Gaussian beam faster. The results are useful in applications for underwater wireless optical communication.
Źródło:
Optica Applicata; 2019, 49, 2; 227-239
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Związek zaangażowania w studiowanie i wypalenia studiami z osiągnięciami akademickimi
Autorzy:
Kulikowski, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/2010577.pdf
Data publikacji:
2016-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
engagement
burnout
academic achievement
grade point average
Opis:
This study addresses the question how students’ engagement and burnout are related to academic achievement the grade point average and the number of passed exams. The study involved 205 students. Multiple regression analysis indicated that burnout is direct significant predictor of grade point average, but the engagement is not. Relation between students’ engagement and the grade point average was mediated by level of burnout. Further analysis revealed that students who have passed all the exams in the first term were characterized by lower level of burnout than students who have not passed all the exams in the first term. However, students from both groups did not differ, in the level of study engagement. The results indicate that high academic achievement is related to the lack of a burnout rather than the presence of engagement. Results also show that the grade point average and the number of passed exams are poor indicators of the level of students’ engagement.
Źródło:
Kultura i Edukacja; 2016, 1(111); 180-196
1230-266X
Pojawia się w:
Kultura i Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stationary configurations for the average distance functional and related problems
Autorzy:
Buttazzo, G.
Mainini, E.
Stepanov, E.
Powiązania:
https://bibliotekanauki.pl/articles/970912.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
average distance functional
Euler equation
stationary point
Opis:
For a functional defined on the class of closed one-dimensional connected subsets of Rn we consider the corresponding minimization problem and we give suitable first order necessary conditions of optimality. The cases studied here are the average distance functional arising in the mass transportation theory, and the energy related to an elliptic PDE.
Źródło:
Control and Cybernetics; 2009, 38, 4A; 1107-1130
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Should we rely on forecasts of prices or returns? The short term approach
Autorzy:
Majerowska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/582777.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
modelling returns
CAPM with GARCH
moving average
Opis:
Investors make their decisions on the basis of the information coming from the market. The main features of assets are prices and investment risk. The rates of return are calculated based on the prices. For modelling the returns, capital asset pricing models can be applied; for the prices, methods of technical analysis could be taken into account. The purpose of this paper is to evaluate both approaches. First – financial modelling of the assets’ returns, and the second – the analysis of the assets’ prices. In order to verify the effectiveness of the forecasting processes, forecasts and ex-post type forecasting errors were calculated. The empirical analysis is based on the stock prices of ten food companies traded on the Warsaw Stock Exchange. The traditional CAPM and the extension of the CAPM by the GARCH(1,1) process are in use. As the technical analysis tool for price modelling, three period moving averages are calculated. The obtained results allow indicating the superiority of modelling the returns, in terms of short-term forecasting. Unfortunately, the hypothesis about the advantage of the application of GARCH for modelling, and then for forecasting, must be rejected.
Źródło:
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu; 2017, 482; 187-200
1899-3192
Pojawia się w:
Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Latitude error in compass deviation. Mathematical method to determine the latitude error in magnetic compass deviation
Autorzy:
Basterretxea, I. I.
Vila- Muñoz, J. A.
Perez -Labajos, C. A.
Powiązania:
https://bibliotekanauki.pl/articles/258974.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
optimal exact coefficients
average deviation
latitude error
Opis:
This article aims to provide the seafarer with a tool to calculate the deviation for a righted ship in any geographical position using only the information available on board. In this way the accidental errors in the deviation card are reduced and the latitude error is made negligible. Moreover, an experimental application of this method is carried out on board a tanker to compare the latitude error in different positions at sea.
Źródło:
Polish Maritime Research; 2014, 3; 25-31
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On double domination in graphs
Autorzy:
Harant, Jochen
Henning, Michael
Powiązania:
https://bibliotekanauki.pl/articles/744292.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
average degree
bounds
double domination
probabilistic method
Opis:
In a graph G, a vertex dominates itself and its neighbors. A subset S ⊆ V(G) is a double dominating set of G if S dominates every vertex of G at least twice. The minimum cardinality of a double dominating set of G is the double domination number $γ_{×2}(G)$. A function f(p) is defined, and it is shown that $γ_{×2}(G) = min f(p)$, where the minimum is taken over the n-dimensional cube $Cⁿ = {p = (p₁,...,pₙ) | p_i ∈ IR, 0 ≤ p_i ≤ 1,i = 1,...,n}$. Using this result, it is then shown that if G has order n with minimum degree δ and average degree d, then $γ_{×2}(G) ≤ ((ln(1+d) + lnδ + 1)/δ)n$.
Źródło:
Discussiones Mathematicae Graph Theory; 2005, 25, 1-2; 29-34
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Equitable Coloring and Equitable Choosability of Graphs with Small Maximum Average Degree
Autorzy:
Dong, Aijun
Zhang, Xin
Powiązania:
https://bibliotekanauki.pl/articles/31342275.pdf
Data publikacji:
2018-08-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
graph coloring
equitable choosability
maximum average degree
Opis:
A graph is said to be equitably $k$-colorable if the vertex set $V (G)$ can be partitioned into $k$ independent subsets $ V_1, V_2, . . ., V_k $ such that $ | | V_i |−| V_j | | \le 1 $ $(1 \le i, j \le k) $. A graph $G$ is equitably $k$-choosable if, for any given $k$-uniform list assignment $L$, $G$ is $L$-colorable and each color appears on at most $ \ceil{ \frac{|V(G)|}{ k } } $ vertices. In this paper, we prove that if $G$ is a graph such that $ mad(G) < 3 $, then $G$ is equitably $k$-colorable and equitably $k$- choosable where $ k \ge \text{max} \{ \Delta (G), 4 \} $. Moreover, if $G$ is a graph such that $ mad(G) < \frac{12}{5} $, then $G$ is equitably $k$-colorable and equitably $k$-choosable where $ k \ge \text{max} \{ \Delta (G), 3 \} $.
Źródło:
Discussiones Mathematicae Graph Theory; 2018, 38, 3; 829-839
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sample-path average cost optimality for semi-Markov control processes on Borel spaces: unbounded costs and mean holding times
Autorzy:
Vega-Amaya, Oscar
Luque-Vásquez, Fernando
Powiązania:
https://bibliotekanauki.pl/articles/1208171.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
sample-path average costs
semi-Markov control processes
Opis:
We deal with semi-Markov control processes (SMCPs) on Borel spaces with unbounded cost and mean holding time. Under suitable growth conditions on the cost function and the mean holding time, together with stability properties of the embedded Markov chains, we show the equivalence of several average cost criteria as well as the existence of stationary optimal policies with respect to each of these criteria.
Źródło:
Applicationes Mathematicae; 2000, 27, 3; 343-367
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On convex combinations of two values
Autorzy:
Nowak, Andrzej
Radzik, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/1339292.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Shapley value
average values
cooperative transferable utility games
Opis:
We study values for cooperative TU-games which are convex combinations of the Shapley value and the solidarity value, introduced in our recent paper [1]. First, we axiomatize the convex combination of the two values in the case when the coefficients are given exogenously. Next, we give an axiomatic description of the whole family of such values.
Źródło:
Applicationes Mathematicae; 1996-1997, 24, 1; 47-56
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uczeń przeciętny – jaki jest?
Autorzy:
Dusza, Bożena
Powiązania:
https://bibliotekanauki.pl/articles/606925.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
average student
education, upbringing
uczeń przeciętny
edukacja
wychowanie
Opis:
Where can we look for mediocrity? The answer is in Polish school. The text is a piece of research which I conducted among secondary school students and students who have graduated from secondary school this year. The studies have shown that about 2/3 of students are average. An ordinary pupil is not very active at school, undistinguished, a conformist and a passive person. S/he doesn’t cause educational problems so s/he disappears from the view of teachers. Meanwhile F. Znaniecki says that if we don’t bring up students to take initiative, to understand meanings, we bring up people who become easy targets to take power over them. This is not the aim of education, is it?
Gdzie można znaleźć przeciętność? W polskiej szkole. Artykuł jest częścią badań, które zostały przeprowadzone na uczniach liceum oraz tych, którzy ukończyli ten etap edukacji w roku 2013. Badania pokazują, że około 2/3 uczniów można zaliczyć do przeciętnych. Taki typ uczniów charakteryzuje mała aktywność w szkole oraz to, że niczym nie wyróżniają się oraz przyjmują postawę konformistyczną i pasywną. Uczniowie tacy nie sprawiają problemów wychowawczych, więc nie są zauważani przez nauczycieli. Florian Znaniecki uważa, że jeśli nie wychowujemy uczniów tak, by byli gotowi podejmować inicjatywę i by rozumieli jej znaczenie, przyczyniamy się do wychowania ludzi, którymi można potem bardzo łatwo rządzić. Mija się to jednak z celem edukacji.
Źródło:
Lubelski Rocznik Pedagogiczny; 2015, 34, 2
0137-6136
Pojawia się w:
Lubelski Rocznik Pedagogiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
INNOŚĆ JAKO DEWIACJA
OTHERNESS AS A DEVIATION
Autorzy:
Leszczyński, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/441673.pdf
Data publikacji:
2013
Wydawca:
Sopocka Akademia Nauk Stosowanych
Tematy:
norma
przeciętność
stygmat
tolerancja
norm
average
stigma
tolerance
Opis:
Inność, zwłaszcza w społeczeństwach homogenicznych, przybiera często status kategorii klinicznej (psychiatrycznej). Pojęcie normalności (zdrowia psychicznego) wyprowadza się w takim wypadku z normy statystycznej: oznacza ono przeciętność. Jest to widoczne w powojennej Polsce, kraju wyróżniającym się etniczną jednorodnością. Wartość tolerancji pozostaje tu zazwyczaj kulturalnym normatywem, z trudnością dającym się odnaleźć w codziennej praktyce międzyludzkiej.
Otherness, especially in homogeneous societies, often takes on a status of clinical category (psychiatric). The notion of normality (mental health) is derived in such case from statistical norm: it means ordinariness. It is visible in the post-war Poland, the country which is characterised by above-average ethnic homogeneity. Value of tolerance remains here usually a cultural norm, which is difficult to be found in everyday human practice.
Źródło:
Przestrzeń, Ekonomia, Społeczeństwo; 2013, 3/1; 9-27
2299-1263
2353-0987
Pojawia się w:
Przestrzeń, Ekonomia, Społeczeństwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
“It’s too late to drink borjomi,” or Russian cultural vocabulary in the modern language space
Autorzy:
Ivanishcheva, Olga N.
Powiązania:
https://bibliotekanauki.pl/articles/678843.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Slawistyki PAN
Tematy:
Russian cultural vocabulary
average native speaker
connotative component
Opis:
“It’s too late to drink borjomi,” or Russian cultural vocabulary in the modern language spaceThis article uses the example of the Russian cultural word боржоми [“borjomi”] to demonstrate how a connotative component is formed within the lexical semantic structure of a Russian cultural word through the incorporation of parts of the historically variable background knowledge of the average native speaker. It is noted that this connotative component emerges from that part of a person’s knowledge which is specific to their nation, leading, in turn, to a metaphorisation of the word’s meaning – the item of realia which it denotes becomes a symbol, and the term acquires a symbolical meaning. In addition, the cultural word’s classifying function, i.e., its capacity to distinguish that particular object out of a series of similar objects, is supplemented by a storage function, i.e., the capacity to reflect, record, and preserve in linguistic units the information acquired by the linguistic individual about the realities of life. The article shows how, in the lexical meaning of the term боржоми [“borjomi”], alongside the definitional component described by modern Russian language dictionaries (‘лечебно-столовая минеральная вода’ [‘a medicinal table mineral water’]), an additional, connotative component can be discerned by analysing the background knowledge of the average Russian native speaker: ‘популярная минеральная вода при желудочных заболеваниях’ [‘a popular type of mineral water used for treating stomach ailments’], and how, as a result of a reconfiguration of social landmarks and changing stereotypes in people’s perception of this realia item, the connotative component of the term боржоми has now acquired a new element: ‘символ советского образа жизни’ [‘a symbol of the Soviet way of life’]. „Za późno pić borżomi”, czyli rosyjskie słownictwo kulturowe we współczesnej przestrzeni językowejW artykule pokazano na przykładzie rosyjskiego słowa kulturowego боржоми [„borżomi”], jak za sprawą włączenia części (zmiennej historycznie) ogólnej wiedzy przeciętnego rodzimego użytkownika formuje się w leksykalnej strukturze semantycznej takiego słowa komponent konotacyjny. Ów komponent konotacyjny powstaje przy tym z tej części wiedzy użytkownika, którą dzieli on z innymi Rosjanami, co z kolei prowadzi do metaforyzacji znaczenia słowa – element rzeczywistości przez nie określany staje się symbolem, a sam wyraz nabiera znaczenia symbolicznego. Funkcja klasyfikacyjna słowa kulturowego, która pozwala mu wyróżniać pewien konkretny przedmiot spośród innych podobnych, zostaje także uzupełniona o funkcję magazynującą, która umożliwia mu odzwierciedlanie, rejestrowanie i przechowywanie w jednostce językowej informacji, jakie użytkownik języka uzyskał na temat realiów życia. Artykuł demonstruje, jak analiza ogólnej wiedzy przeciętnego rodzimego użytkownika języka rosyjskiego pozwala w znaczeniu wyrazu боржоми [„borżomi”] wyróżnić, oprócz komponentu definicyjnego opisywanego przez współczesne słowniki (‘лечебно-столовая минеральная вода’ [‘leczniczo-stołowa woda mineralna’]), także komponent konotacyjny (‘популярная минеральная вода при желудочных заболеваниях’ [‘popularna woda mineralna stosowana przez schorzeniach żołądka’]) – a także jak w wyniku rekonfiguracji społecznych punktów orientacyjnych i zmian stereotypów składających się na postrzeganie tego elementu rzeczywistości komponent konotacyjny wyrazu боржоми wzbogacił się o znaczenie ‘символ советского образа жизни’ [‘symbol radzieckiego stylu życia’].
Źródło:
Studia z Filologii Polskiej i Słowiańskiej; 2018, 53
2392-2435
0081-7090
Pojawia się w:
Studia z Filologii Polskiej i Słowiańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3-Paths in Graphs with Bounded Average Degree
Autorzy:
Jendrol, Stanislav
Maceková, Mária
Montassier, Mickaël
Soták, Roman
Powiązania:
https://bibliotekanauki.pl/articles/31340952.pdf
Data publikacji:
2016-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
average degree
structural property
3-path
degree sequence
Opis:
In this paper we study the existence of unavoidable paths on three vertices in sparse graphs. A path uvw on three vertices u, v, and w is of type (i, j, k) if the degree of u (respectively v, w) is at most i (respectively j, k). We prove that every graph with minimum degree at least 2 and average degree strictly less than m contains a path of one of the types Moreover, no parameter of this description can be improved.
Źródło:
Discussiones Mathematicae Graph Theory; 2016, 36, 2; 339-353
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linear List Coloring of Some Sparse Graphs
Autorzy:
Chen, Ming
Li, Yusheng
Zhang, Li
Powiązania:
https://bibliotekanauki.pl/articles/32083756.pdf
Data publikacji:
2021-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
linear coloring
maximum average degree
planar graphs
discharging
Opis:
A linear $k$-coloring of a graph is a proper $k$-coloring of the graph such that any subgraph induced by the vertices of any pair of color classes is a union of vertex-disjoint paths. A graph $G$ is linearly $L$-colorable if there is a linear coloring $c$ of $G$ for a given list assignment $L = \{L(v) : v ∈ V(G)\}$ such that $c(v) ∈ L(v)$ for all $v ∈ V(G)$, and $G$ is linearly $k$-choosable if $G$ is linearly $L$-colorable for any list assignment with $|L(v)| ≥ k$. The smallest integer $k$ such that $G$ is linearly $k$-choosable is called the linear list chromatic number, denoted by $lc_l(G)$. It is clear that \(lc_l(G)≥\Big\lceil\frac{\Delta(G)}{1}\Big\rceil+1\) for any graph $G$ with maximum degree $\Delta(G)$. The maximum average degree of a graph $G$, denoted by $mad(G)$, is the maximum of the average degrees of all subgraphs of $G$. In this note, we shall prove the following. Let $G$ be a graph, (1) if $mad(G)<\frac{8}{3}$ and $\Delta(G) ≥ 7$, then \(lc_l(G)=\Big\lceil\frac{\Delta(G)}{2}\Big\rceil+1\); (2) if $mad(G)<{18}{7}$ and $\Delta(G) ≥ 5$, then \(lc_l(G)=\Big\lceil\frac{\Delta(G)}{2}\Big\rceil+1\); (3) if $mad(G)<{20}{7}$ and $\Delta(G) ≥ 5$, then \(lc_l(G)≤\Big\lceil\frac{\Delta(G)}{2}\Big\rceil+2\).
Źródło:
Discussiones Mathematicae Graph Theory; 2021, 41, 1; 51-64
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
OWA operators in the weighted average and their application in decision making
Autorzy:
Merigó, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/205674.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
weighted average
OWA operator
decision-making
aggregation operators
Opis:
We introduce a new aggregation operator that unifies the weighted average (WA) and the ordered weighted averaging (OWA) operator in a single formulation. We call it the ordered weighted averaging - weighted average (OWAWA) operator. This aggregation operator provides a more complete representation of the weighted average and the OWA operator because it considers the degree of importance that each concept has in the aggregation and includes them as particular cases of a more general context. We study different properties and families of the OWAWA operator. The applicability of this method is very broad because any study that uses the weighted average or the OWA can be revised and extender with our approach. We focus on a multi-person decision-making application in the selection of financial strategies.
Źródło:
Control and Cybernetics; 2012, 41, 3; 605-643
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of graph theory to linguistic complexity
Autorzy:
Piperski, Alexander
Powiązania:
https://bibliotekanauki.pl/articles/1151871.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
linguistic complexity
morphology
graph theory
average vertex degree
Opis:
This article introduces a new measure of linguistic complexity which is based on the dual nature of the linguistic sign. Complexity is analyzed as consisting of three components, namely the conceptual complexity (complexity of the signified), the formal complexity (complexity of the signifier) and the form-meaning correspondence complexity. I describe a way of plotting the form-meaning relationship on a graph with two tiers (the form tier and the meaning tier) and apply a complexity measure from graph theory (average vertex degree) to assess the complexity of such graphs. The proposed method is illustrated by estimating the complexity of full noun phrases (determiner + adjective + noun) in English, Swedish, and German. I also mention the limitations and the problems which might arise when using this method.
Źródło:
Yearbook of the Poznań Linguistic Meeting; 2014, 1, 1
2449-7525
Pojawia się w:
Yearbook of the Poznań Linguistic Meeting
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strategic Learning Techniques - Measures Enhancing the Visibility of the Cognitive Process of Learning
Autorzy:
Beckmann-Hamzei, Helen
Powiązania:
https://bibliotekanauki.pl/articles/1197885.pdf
Data publikacji:
2017-06-08
Wydawca:
Akademia Ignatianum w Krakowie
Tematy:
strategic learning
grade-point-average
slow-motion-learning
Opis:
RESEARCH OBJECTIVE: The aim of the contribution is to provide insights on how strategic learning techniques could constitute measures enhancing the visibility of the cognitive process of learning. THE RESEARCH PROBLEM AND METHODS: The competence of learning as such and its application in practice in educational institutions is a mainly cognitive experience. Copying the learning behavior as such is therefore more difficult compared to the learning through imitation during childhood, as the cognitive part of learning is not immediately visible for the outstanding person wishing to improve his or her learning competence. Alongside three examples from practice, the contribution examines those strategic learning techniques, which can enhance the visibility of the cognitive process of learning. THE PROCESS OF ARGUMENTATION: The pressure of ensuring success at school can lead to the participation of learners in private lessons and revision courses. As participation in these courses mainly focusses on the revision of discipline knowledge that is tested in exams, one may argue that these courses only heal the symptoms of disappointing examination results. RESEARCH RESULTS: The present contribution argues that an investment into the learning competences as such does entail long-term benefits compared to the transferal of discipline knowledge in private lesson and revision courses. CONCLUSIONS, INNOVATIONS AND RECOMMENDATIONS: The drafters of curricula should reassess whether the major focus on discipline knowledge based subjects occupy the majority of curricular obligations is a welcoming development. This development should critically be reflected and perhaps even changed by introducing compulsory strategic learning courses throughout the educational training of learners.
Źródło:
Horyzonty Wychowania; 2017, 16, 37; 71-86
1643-9171
2391-9485
Pojawia się w:
Horyzonty Wychowania
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Universal equations for Pythagorean and Sauter-type formulas of mean value calculation and classification of the Extended Pythagorean Means
Autorzy:
Drzymała, J.
Powiązania:
https://bibliotekanauki.pl/articles/88936.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
average value
mean size
mean diameter
weighted mean
Opis:
A general equation, combining the Pythagorean and Sauter-type formulas, which can be used for calculation of a mean of a set of values is given and discussed in the paper. A classification of means, forming the Extended Pythagorean Means family, including power (arithmetic, geometric, quadratic, cubic, etc.), inverted power (harmonic, inverted quadratic, inverted cubic, etc.), and Sauter-type (volumesurface, volume-length, etc.) is presented. The calculated means, depending on their type, are different. Formulas for calculating mean values for a set of values treated individually, in groups and as a fraction (weighted mean) are also given.
Źródło:
Mining Science; 2017, 24; 227-235
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reasons behind changes in the share of labour in national income in the Polish economy: Selected aspects
Autorzy:
Gawrycka, Małgorzata
Szymczak, Anna
Powiązania:
https://bibliotekanauki.pl/articles/522288.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Average salary
Employment structure
Labour share
National economy
Opis:
Aim/purpose – The aim of this paper is to examine the impact of structural changes taking place in the Polish economy on the share of labour in national income. Design/methodology/approach – The scope of this study includes a review of the literature dedicated to the issue and an empirical analysis of data available on this topic. The study uses elements of descriptive statistics and the method of induction. Findings – The conducted analysis shows that in the years 2005-2016, a relation contrary to that reported by de Serres, Scarpetta, & de la Maisonneuve (2002), concerning shifts of employee groups between sectors of the national economy, prevailed in Poland. No research results on the impact of the decrease in the share of self-employed on the decrease in the share of labour in the national income have been confirmed. At the same time, the effect of changes in the relation between employee remuneration and the added value, resulting from their transition between sectors of the national economy, was positively verified. Research implications/limitations – The results related to changes in the share of self- -employed in the national economy should be treated with caution, as there are also economically inactive entities listed in the Central Statistical Office (GUS) register. Originality/value/contribution – To date, in Poland comprehensive research into the influence of structural changes on the share of labour in national income has not been conducted.
Źródło:
Journal of Economics and Management; 2019, 36; 5-18
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of graph theory to linguistic complexity
Autorzy:
Piperski, Alexander
Powiązania:
https://bibliotekanauki.pl/articles/2135360.pdf
Data publikacji:
2014-11-19
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
linguistic complexity
morphology
graph theory
average vertex degree
Opis:
This article introduces a new measure of linguistic complexity which is based on the dual nature of the linguistic sign. Complexity is analyzed as consisting of three components, namely the conceptual complexity (complexity of the signified), the formal complexity (complexity of the signifier) and the form-meaning correspondence complexity. I describe a way of plotting the form-meaning relationship on a graph with two tiers (the form tier and the meaning tier) and apply a complexity measure from graph theory (average vertex degree) to assess the complexity of such graphs. The proposed method is illustrated by estimating the complexity of full noun phrases (determiner + adjective + noun) in English, Swedish, and German. I also mention the limitations and the problems which might arise when using this method.
Źródło:
Yearbook of the Poznań Linguistic Meeting; 2014, 1, 1; 89-102
2449-7525
Pojawia się w:
Yearbook of the Poznań Linguistic Meeting
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance optimization of multi-roller flat burnishing process in terms of surface properties
Autorzy:
Le, Minh-Thai
Van, An-Le
Nguyen, Trung Thanh
Powiązania:
https://bibliotekanauki.pl/articles/24084649.pdf
Data publikacji:
2023
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
roller burnishing
average roughness
Brinell hardness
process parameter
Opis:
In the current investigation, two primary indicators, including the average roughness (AR) and Brinell hardness (BH) of the roller burnishing operation are enhanced using the optimal inputs (the spindle speed-S, feed rate-f, and depth of penetration-D). The performance measures are developed using the Kriging approach and optimal outcomes are generated by the Crow Search Algorithm (CSA). The optimal outcomes generated by the CSA of the S, f, and D were 832 rpm, 112 mm/min, and 0.12 mm, while the AR was reduced by 37.0% and the BH was increased by 29.9%, respectively. The optimal findings could be utilized in the practice for enhancing the burnished quality and to develop a professional system related to the roller burnishing operation. The Kriging-based AR and BH correlations could be used to present nonlinear experimental data. The optimizing technique could be utilized to deal with optimizing problems for different machining operations.
Źródło:
Journal of Machine Engineering; 2023, 23, 2; 159--173
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acyclic 6-Colouring of Graphs with Maximum Degree 5 and Small Maximum Average Degree
Autorzy:
Fiedorowicz, Anna
Powiązania:
https://bibliotekanauki.pl/articles/30146851.pdf
Data publikacji:
2013-03-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
acyclic colouring
bounded degree graph
maximum average degree
Opis:
A k-colouring of a graph G is a mapping c from the set of vertices of G to the set {1, . . ., k} of colours such that adjacent vertices receive distinct colours. Such a k-colouring is called acyclic, if for every two distinct colours i and j, the subgraph induced by all the edges linking a vertex coloured with i and a vertex coloured with j is acyclic. In other words, every cycle in G has at least three distinct colours. Acyclic colourings were introduced by Gr¨unbaum in 1973, and since then have been widely studied. In particular, the problem of acyclic colourings of graphs with bounded maximum degree has been investigated. In 2011, Kostochka and Stocker showed that any graph with maximum degree 5 can be acyclically coloured with at most 7 colours. The question, whether this bound is achieved, remains open. In this note we prove that any graph with maximum degree 5 and maximum average degree at most 4 admits an acyclic 6-colouring. We also provide examples of graphs with these properties.
Źródło:
Discussiones Mathematicae Graph Theory; 2013, 33, 1; 91-99
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Moving Average and Differential Operation for Wheeze Detection in Spectrograms
Autorzy:
Hsueh, Meng-Lun
Chen, Jin-Peng
Lu, Bing-Yuh
Wu, Huey-Dong
Liu, Pei-Yi
Powiązania:
https://bibliotekanauki.pl/articles/31340111.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
differential operation
moving average
signal
lung sound
wheeze
Opis:
A moving average (MA) is a commonly used noise reduction method in signal processing. Several studies on wheeze auscultation have used MA analysis for preprocessing. The present study compared the performance of MA analysis with that of differential operation (DO) by observing the produced spectrograms. These signal preprocessing methods are not only applicable to wheeze signals but also to signals produced by systems such as machines, cars, and flows. Accordingly, this comparison is relevant in various fields. The results revealed that DO increased the signal power intensity of episodes in the spectrograms by more than 10 dB in terms of the signal-to-noise ratio (SNR). A mathematical analysis of relevant equations demonstrated that DO could identify high-frequency episodes in an input signal. Compared with a two-dimensional Laplacian operation, the DO method is easier to implement and could be used in other studies on acoustic signal processing. DO achieved high performance not only in denoising but also in enhancing wheeze signal features. The spectrograms revealed episodes at the fourth or even fifth harmonics; thus, DO can identify high-frequency episodes. In conclusion, MA reduces noise and DO enhances episodes in the high-frequency range; combining these methods enables efficient signal preprocessing for spectrograms.
Źródło:
Archives of Acoustics; 2022, 47, 3; 383-388
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid reliability modelling under general uncertainty
Autorzy:
Guo, R.
Cui, Y.
Thiart, C.
Guo, D.
Powiązania:
https://bibliotekanauki.pl/articles/2069636.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
uncertain measure
hybrid lifetime
uncertain parameter
average chance reliability
Opis:
The real world phenomena are often facing the co-existence reality of different formality of uncertainty and thus the probabilistic reliability modeling practices are very doubtful. Under complicated uncertainty environments, hybrid variable modeling is important in reliability and risk analysis, which includes Bayesian distributional theory, random fuzzy distributional theory, as well as fuzzy random distributional theory as special distribution families. In this paper, we define a new hybrid lifetime which is specified by a random lifetime distribution with an uncertain distributed parameter, which is called as random uncertain hybrid lifetime. We furthermore define the average chance distribution as a quality index for quantifying the hybrid lifetime and accordingly the average chance reliability is derived.
Źródło:
Journal of Polish Safety and Reliability Association; 2010, 1, 1; 115--122
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a new solution concept for bargaining problems
Autorzy:
Radzik, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/1338962.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
twisting
bargaining solution
bargaining problem
average pay-off solution
Opis:
The purpose of this paper is to discuss the properties of a new solution of the 2-person bargaining problem as formulated by Nash, the so-called Average Pay-off solution. This solution of a very simple form has a natural interpretation based on the center of gravity of the feasible set, and it is "more sensitive" to changes of feasible sets than any other standard bargaining solution. It satisfies the standard axioms: Pareto-Optimality, Symmetry, Scale Invariance, Continuity and Twisting. Moreover, it satisfies a new desirable axiom, Equal Area Twisting. It is surprising that no standard solution of bargaining problems has this property. The solution considered can be generalized in a very natural and unique way to n-person bargaining problems.
Źródło:
Applicationes Mathematicae; 1998-1999, 25, 3; 285-294
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A control chart using belief information for a gamma distribution
Autorzy:
Aslam, M.
Khan, N.
Jun, C. -H.
Powiązania:
https://bibliotekanauki.pl/articles/406500.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
control chart
belief statistic
average run length
gamma distribution
Opis:
The design of a control chart has been presented using a belief estimator by assuming that the quantitative characteristic of interest follows the gamma distribution. The authors present the structure of the proposed chart and derive the average run lengths for in-control and a shifted process. The aver-age run lengths for various specified parameters have been reported. The efficiency of the proposed chart has been compared to existing control charts. The application of the proposed chart is illustrated with the help of simulated data.
Źródło:
Operations Research and Decisions; 2016, 26, 4; 5-19
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solubility of butylated hydroxytoluene (BHT) in aqueous and alcohol sulutions from 293.15 to 313.15 K
Autorzy:
Baluja, S.
Bhesaniya, K.
Bhalodia, R.
Chanda, S.
Powiązania:
https://bibliotekanauki.pl/articles/412163.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
butylated hydroxytoluene (BHT)
average deviation
relative deviation
gibbs energy
Opis:
The solubility of Butylated hydroxyl toluene in aqueous and alcohol solutions were determined at different temperatures (293.15 to 313.15) K. Using Van’t Hoff and Gibb’s equations, some thermodynamic functions such as Gibbs energy, enthalpy and entropy of dissolution, and of mixing of Butylated hydroxyl toluene in aqueous and alcohol solutions, were evaluated from solubility data. The solubility was greater in butanol and minimum in water. The enthalpies, entropy and Gibb’s energy of dissolution were positive for all solvents.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 9; 48-58
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accuracy of Assessing the Level of Impulse Sound From Distant Sources
Autorzy:
Wszołek, T.
Kłaczyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/89989.pdf
Data publikacji:
2007
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
impulse sound
noise measurement
long-term average immission level
Opis:
Impulse sound events are characterised by ultra high pressures and low frequencies. Lower frequency sounds are generally less attenuated over a given distance in the atmosphere than higher frequencies. Thus, impulse sounds can be heard over greater distances and will be more affected by the environment. To calculate a longterm average immission level it is necessary to apply weighting factors like the probability of the occurrence of each weather condition during the relevant time period. This means that when measuring impulse noise at a long distance it is necessary to follow environmental parameters in many points along the way sound travels and also to have a database of sound transfer functions in the long term. The paper analyses the uncertainty of immission measurement results of impulse sound from cladding and destroying explosive materials. The influence of environmental conditions on the way sound travels is the focus of this paper.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2007, 13, 4; 433-440
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of winding topologies on the performance of flux-switching permanent magnet machine having different number of rotor poles
Autorzy:
Chijioke Awah, Ch.
Inya Okoro, O.
Powiązania:
https://bibliotekanauki.pl/articles/140434.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
average torque
copper loss
phase back-EMF
winding topologies
Opis:
Comparison of the electromagnetic performance of a flux-switching permanent magnet (PM) machine having two separate stators as well as different winding topologies is investigated in this paper. Different stator and rotor pole combinations of these machines are also considered. The analysis includes the open-circuit and on-load characteristics of the analyzed machines. It is observed that, the largest fundamental values of electromagnetic torque, for each winding topology, is seen in the 11-rotor-pole and 10-rotor-pole machines having alternate- and all-pole-wound configurations, respectively. Moreover, significant ripple is observed in the waveforms of the even-number rotor pole machines compared to their corresponding odd-number rotor pole counterparts. Overall, the alternate-pole-wound machines essentially have larger torque-density than their equivalent all-pole-wound ones. The investigated machine is also tested for validation.
Źródło:
Archives of Electrical Engineering; 2018, 67, 4; 845-855
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Propozycja narzędzia do pomiaru natężenia poczucia zagrożenia stereotypem wśród dzieci, opracowanego na podstawie koncepcji multizagrożeń Jenessy Shapiro i Stevena Neuberga
A Proposed Tool for Measuring the Intensity of Sensing a Stereotype Threat Among Children, Based on Jenessa Shapiro’s and Steven Neuberg’s Concept of Multi-Threats
Autorzy:
Borsich, Szymon
Deptuła, Maria
Powiązania:
https://bibliotekanauki.pl/articles/15840372.pdf
Data publikacji:
2018-09-15
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
sense of stereotype threat
average school age
scale for measurement
Opis:
Scientificmagazines have published hundreds of research papers on stereotype threat. They indicated that despite their intellectual potential some individuals may experience lower performance in school tasks because of the fear of confirminga stereotype about the low abilities of their social group. Most of the research was of an experimental nature, with the use of a single manipulation within the experiment group and comparing its results to those of the control group. Additionally, despite two decades of research, discrepancies in how the term is definedor in the manipulation and measurement methods persist. The article outlines the development of a tool for measuring the intensity of a sense of low abilities stereotype threat among elementary school pupils (grades IV-VI) and the results of a pilot study. The scale was developed based on the theoretical assumptions of Shapiro’s and Neuberg’s multi-threat concept, which appears to put in order the aforementioned discrepancies in understanding the phenomenon’s essence and the ways it is measured.
Źródło:
Studia Edukacyjne; 2018, 49; 185-213
1233-6688
Pojawia się w:
Studia Edukacyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A two-stage stochastic programming approach for production planning system with seasonal demand
Autorzy:
Mahmoud, Asmaa A.
Aly, Mohamed F.
Mohib, Ahmed M.
Afefy, Islam H.
Powiązania:
https://bibliotekanauki.pl/articles/952860.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
process manufacturing system
two-stage stochastic programming
sampling average approximation
Opis:
Seasonality is a function of a time series in which the data experiences regular and predictable changes that repeat each calendar year. Two-stage stochastic programming model for real industrial systems at the case of a seasonal demand is presented. Sampling average approximation (SAA) method was applied to solve a stochastic model which gave a productive structure for distinguishing and statistically testing a different production plan. Lingo tool is developed to obtain the optimal solution for the proposed model which is validated by Math works Matlab. The actual data of the industrial system; from the General Manufacturing Company, was applied to examine the proposed model. Seasonal future demand is then estimated using the multiplicative seasonal method, the effect of seasonality was presented and discussed. One might say that the proposed model is viewed as a moderately accurate tool for industrial systems in case of seasonal demand. The current research may be considered a significant tool in case of seasonal demand. To illustrate the applicability of the proposed model a numerical example is solved using the proposed technique. ANOVA analysis is applied using MINITAB 17 statistical software to validate the obtained results.
Źródło:
Management and Production Engineering Review; 2020, 11, 1; 31--42
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some totally 4-choosable multigraphs
Autorzy:
Woodall, Douglas
Powiązania:
https://bibliotekanauki.pl/articles/743409.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
maximum average degree
planar graph
total choosability
list total colouring
Opis:
It is proved that if G is multigraph with maximum degree 3, and every submultigraph of G has average degree at most 2(1/2) and is different from one forbidden configuration C⁺₄ with average degree exactly 2(1/2), then G is totally 4-choosable; that is, if every element (vertex or edge) of G is assigned a list of 4 colours, then every element can be coloured with a colour from its own list in such a way that no two adjacent or incident elements are coloured with the same colour. This shows that the List-Total-Colouring Conjecture, that ch''(G) = χ''(G) for every multigraph G, is true for all multigraphs of this type. As a consequence, if G is a graph with maximum degree 3 and girth at least 10 that can be embedded in the plane, projective plane, torus or Klein bottle, then ch''(G) = χ''(G) = 4. Some further total choosability results are discussed for planar graphs with sufficiently large maximum degree and girth.
Źródło:
Discussiones Mathematicae Graph Theory; 2007, 27, 3; 425-455
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonparametric adaptive control for discrete-time Markov processes with unbounded costs under average criterion
Autorzy:
Minjárez-Sosa, J.
Powiązania:
https://bibliotekanauki.pl/articles/1338768.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Markov control process
discounted and average cost criterion
adaptive policy
Opis:
We introduce average cost optimal adaptive policies in a class of discrete-time Markov control processes with Borel state and action spaces, allowing unbounded costs. The processes evolve according to the system equations $x_{t+1}=F(x_t,a_t,ξ _t)$, t=1,2,..., with i.i.d. $ℝ^k$-valued random vectors $ξ_t$, which are observable but whose density ϱ is unknown.
Źródło:
Applicationes Mathematicae; 1999, 26, 3; 267-280
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ergodic control of partially observed Markov processes with equivalent transition probabilities
Autorzy:
Stettner, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1340658.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
partial observation
long run average cost
stochastic control
Bellman equation
Opis:
Optimal control with long run average cost functional of a partially observed Markov process is considered. Under the assumption that the transition probabilities are equivalent, the existence of the solution to the Bellman equation is shown, with the use of which optimal strategies are constructed.
Źródło:
Applicationes Mathematicae; 1993-1995, 22, 1; 25-38
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiary w sieciach SN do wymiarowania układów IPFC
Measurements in average voltage networks for IPFC dimensioning
Autorzy:
Benysek, G.
Powiązania:
https://bibliotekanauki.pl/articles/157542.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sieci SN
wymiarowanie układów IPFC
average voltage networks
IFPEC dimensioning
Opis:
W chwili obecnej stosowanych jest wiele rozwiązań umożliwiających poprawę jakości energii elektrycznej w systemie elektroenergetycznym sa to m.in.: i) Sterowniki Przesyłu Mocy z ang. UPFC; ii) Zunifikowane Sterowniki Jakości Mocy z ang. UPQC; iii) Międzysystemowe Sterowniki przepływu Mocy z ang. IPFC. Układy IPFC stanowią szeregowe lub szeregowo-równoległe połączenie filtrów aktywnych prcujących dla określonej liczby linii przesyłowych z jednym wspólnym dla wszystkich linii, elementem magazynującym energię. Właściwości układów IPFC obejmują: sterowanie przepływem mocy między liniami przesyłowymi, kompensację mocy biernej, poprawe stabilności systemu itp. W artykule wykazano, że przy podejściu probabilistycznym, do procesów zachodzących w systemie elektroenergetycznym, możliwa jest znaczna redukcja mocy przekształtnika równoległego wchodzącego w skład układu IPFC.
The improve energy quality in distribution systems, many different solutions are implemented, for example: i) Unified Power Flow Controllers (UPFC); ii) Unified Power Quality Conditioners (UPQC); iii) Interline Power Flow controllers (IPFC). Interline Power Flow are classic series or series parallel filters applied to given number of independent lines with common, for all lines, DC element. Their possible functions are enlarging and include power flow control between lines, reactive power compensation and distribution system`s stability improvement. In the paper we will show that using probabilistic approch to the distribution system we can considerably decrease power rating of the Interline Power Flow Controller`s.
Źródło:
Pomiary Automatyka Kontrola; 2003, R. 49, nr 2/3, 2/3; 29-32
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Modal Study on the Estimation of Daily Global Solar Radiation from Sunshine Duration
Autorzy:
Er, Z.
Rouabah, Z.
Turna, I.
Powiązania:
https://bibliotekanauki.pl/articles/1031570.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
Daily Average Solar Radiation
Sunshine Duration
Global Solar Radiation Model
Opis:
Building solar plants with suitable placement in the correct geographic areas by utilizing information of solar radiation is the starting point of an investment projects of a solar energy facility. In these premises, several solar radiation models have been improved in order to estimate the solar radiation at a given location, all around the world. Complete and accurate solar radiation data at a specific region are quite important for the solar energy related researches. A number of formulas and models have been developed to estimate solar radiation for the locations, where measured values are not available. Thus, several empirical correlations have been developed in the literature. In this study, models such as the Angström equation, which is reviewed in literature, are used to estimate global solar radiation from sunshine duration in Turkey. In addition, the solar radiation models were examined at the identified solar radiation regions. This study investigates either the correctness of the model itself or the correctness of the estimation of global solar radiation, based on a set of statistical parameters such as R², RMSE, MBE, MABE, MPE and MAPE.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 1070-1075
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the sequential probability ratio test to verification of statistical hypotheses
Zastosowanie sekwencyjnych testów ilorazowych do weryfikacji hipotez statystycznych
Autorzy:
Pekasiewicz, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/904612.pdf
Data publikacji:
1997
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
sequential probability ratio test
operating characteristic function
average sample size
Opis:
The paper deals with some problems concerning the sequential probability ratio tests (SPRT) and their application to verifying simple and composite statistical hypotheses. Besides properties and examples of SPRT, there are presented advantages o f this group of tests and reasons why we cannot always apply them in practice.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 1997, 141
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
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