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Tytuł:
A generalization of the graph Laplacian with application to a distributed consensus algorithm
Autorzy:
Zhai, G.
Powiązania:
https://bibliotekanauki.pl/articles/331278.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
graph Laplacian
generalized graph Laplacian
adjacency weights
distributed consensus algorithm
cooperative control
Opis:
In order to describe the interconnection among agents with multi-dimensional states, we generalize the notion of a graph Laplacian by extending the adjacency weights (or weighted interconnection coefficients) from scalars to matrices. More precisely, we use positive definite matrices to denote full multi-dimensional interconnections, while using nonnegative definite matrices to denote partial multi-dimensional interconnections. We prove that the generalized graph Laplacian inherits the spectral properties of the graph Laplacian. As an application, we use the generalized graph Laplacian to establish a distributed consensus algorithm for agents described by multi-dimensional integrators.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 2; 353-360
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new approach for criteria weight elicitation of the ARAS-H method
Autorzy:
Ghram, Maroua
Moalla Frikha, Hela
Powiązania:
https://bibliotekanauki.pl/articles/2027997.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
ARAS-H
Criteria weights
Mathematical programming
Multiple Criteria Decision Aiding
Preference disaggregation
Opis:
Criteria weight inference is a crucial step for most of multi-criteria methods. However, criteria weights are often determined directly by the decision-maker (DM) which makes the results unreliable. Therefore, to overcome the imprecise weighting, we suggest the use of the preference programming technique. Instead of obtaining criteria weights directly from the DM, we infer them in a more objective manner to avoid the subjectivity and the unreliability of the results. Our aim is to elicit the ARAS-H criteria weights at each level of the hierarchy tree via mathematical programming, taking into account the DM’s preferences. To put it differently, starting from preference information provided by the DM, we proceed to model our constraints. The ARAS-H method is an extension of the classical ARAS method for the case of hierarchically structured criteria. We adopt a bottom-up approach in order to elicit ARAS-H criteria weights, that is, we start by determining the elementary criteria weights (i.e. the criteria at the lowest level of the hierarchy tree). The solution of the linear programs is obtained using LINGO software. The main contribution of our criteria weight elicitation procedure is in overcoming imprecise weighting without excluding the DM from the decision making process.
Źródło:
Multiple Criteria Decision Making; 2021, 16; 89-109
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Procedure of Criteria Weight Determination Within the ARAS Method
Autorzy:
Ghram, Maroua
Moalla Frikha, Hela
Powiązania:
https://bibliotekanauki.pl/articles/578473.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Kryteria oceny
Metoda ARAS
Wielokryterialna analiza decyzyjna
ARAS method
Criteria weights
Multiple criteria decision analysis
Opis:
In most of multicriteria aggregation methods, we need to elicit parameters that are generally determined directly by the decision-maker (DM). Direct assigning of parameters and criteria weights presents a crucial and difficult step in the decision-making process. However, this kind of information is too subjective and may affects the reliability of the results. To overcome this issue, we suggest a weighting method based on mathematical programming to incorporate the DM’s preferences indirectly within the ARAS method.
Źródło:
Multiple Criteria Decision Making; 2018, 13; 56-73
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A relation of dominance for the bicriterion bus routing problem
Autorzy:
Widuch, J.
Powiązania:
https://bibliotekanauki.pl/articles/330092.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
multicriteria optimization
set of nondominated solutions
bicriterion shortest path problem
variable weights
label correcting algorithm
transportation problem
optymalizacja wielokryterialna
zbiór rozwiązań niezdominowanych
dwukryterialny problem najkrótszej ścieżki
zmienne wagi
problem transportowy
Opis:
A bicriterion bus routing (BBR) problem is described and analysed. The objective is to find a route from the start stop to the final stop minimizing the time and the cost of travel simultaneously. Additionally, the time of starting travel at the start stop is given. The BBR problem can be resolved using methods of graph theory. It comes down to resolving a bicriterion shortest path (BSP) problem in a multigraph with variable weights. In the paper, differences between the problem with constant weights and that with variable weights are described and analysed, with particular emphasis on properties satisfied only for the problem with variable weights and the description of the influence of dominated partial solutions on non-dominated final solutions. This paper proposes methods of estimation a dominated partial solution for the possibility of obtaining a non-dominated final solution from it. An algorithm for solving the BBR problem implementing these estimation methods is proposed and the results of experimental tests are presented.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2017, 27, 1; 133-155
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Weight of Seleucia in Pieria in Nea Paphos
Autorzy:
Łajtar, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1975511.pdf
Data publikacji:
2021-12-31
Wydawca:
Polska Akademia Nauk. Instytut Kultur Śródziemnomorskich i Orientalnych PAN
Tematy:
Cyprus
Nea Paphos
Seleucia in Pieria
ancient weights
agora
Opis:
Archaeological excavations carried out by a mission from the Jagiellonian University Institute of Archaeology on the site of the agora of Nea Paphos in Cyprus brought to light a lead weight with a Greek inscription giving the year 251 of an era and mentioning an agoranomos with the name Seleukos. On the basis of parallels, the author demonstrates that the weight must have been issued by the North Syrian city of Seleucia in Pieria, and the era used in the inscription is the civic era of Seleucia with the starting point in 109/108 BC, which allows one to date the object to AD 142/143. He argues that the structure where the object was found can tentatively be identified as agoranomeion of Nea Paphos.
Źródło:
Études et Travaux (Institut des Cultures Méditerranéennes et Orientales de l’Académie Polonaise des Sciences); 2021, 34; 255-263
2084-6762
2449-9579
Pojawia się w:
Études et Travaux (Institut des Cultures Méditerranéennes et Orientales de l’Académie Polonaise des Sciences)
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
AHP QFD methodology for a recycled solar collector
Autorzy:
El-Badaoui, Meryem
Touzani, Abdellatif
Powiązania:
https://bibliotekanauki.pl/articles/23966561.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
AHP
QFD
badanie rynku
solarny podgrzewacz powietrza z recyklingu
współczynnik konsystencji „CR”
market research
recycled solar air heater
weights of criteria
consistency ratio “CR
Opis:
As it is presented in literature, the AHP-QFD method is a method applicable to many sectors, namely industry. The article is a part of this framework, applying this method for the design of a recycled solar air heater according to customer’s expectations. The methodology is based on the application of QFD to detect consumer requirements, technical characteristics and their relationship matrices. while the AHP method aims to evaluate the weights of each criterion in order to make the right decision. In this study, the manufacturing process was projected from upstream to downstream, as well as a market study was established in October 2020, in Khouribga-Morocco, in which 50 people responded favourably to a survey about the most frequently searched requirements which include size, efficiency, design, price and ecology as well as their importance in a solar collector. Besides, relationship matrices and the weight matrices of the technical criteria have been established, by presenting a consistent ratio “CR” less than 10% showing the consistency of the assessment, and finally a priority given to the characteristics of the recycled solar air heater: cans and thermal insulation more superior to the others characteristics.
Źródło:
Production Engineering Archives; 2022, 28, 1; 30--39
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza zanieczyszczenia powietrza w Polsce z wykorzystaniem przestrzennej dynamicznej metody przesunięć udziałów
Analysis of air pollution in Poland using the spatial dynamic shift-share method
Autorzy:
Antczak, E.
Powiązania:
https://bibliotekanauki.pl/articles/95835.pdf
Data publikacji:
2014
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
zanieczyszczenie powietrza
zrównoważony rozwój społeczno-gospodarczy
przestrzenna dynamiczna metoda przesunięć udziałów
macierze wag przestrzennych
air pollution
sustainable socio-economic development
spatial dynamic shift-share method
spatial weights matrices
Opis:
Zasadniczym celem artykułu jest analiza zmian wielkości zanieczyszczenia powietrza w podregionach Polski w latach 1998-2012, według rodzajów substancji zanieczyszczających [tlenek węgla, dwutlenek siarki, tlenki azotu i pyły, wyrażonych w kilogramach na mieszkańca) z zastosowaniem przestrzennej dynamicznej metody przesunięć udziałów. W opracowaniu dokonano oceny tempa wzrostu wielkości zjawiska. Ponadto, zidentyfikowano i oszacowano udział czynników strukturalnych, sektorowych oraz regionalnych (lokalnych, przestrzennych) w wielkości efektu globalnego (zanieczyszczenia w Polsce ogółem) w przekroju podregionów. Dodatkowo włączono do badania aspekty przestrzenne (zależności międzyregionalne) w postaci macierzy wag przestrzennych. jednakże, ze względu na różnokierunkowy i transgraniczny charakter zmiennej aplikowano różne typy macierzy. Skonstruowano je na podstawie sąsiedztwa jednostek oraz estymowanych trendów przestrzennych dotyczących ilości emitowanych zanieczyszczeń. W badaniu wykorzystano również elementy eksploracyjnej analizy danych przestrzennych.
The aim of this paper is to examine the air pollution in the Polish subregions from years 1998 to 2012 by type of pollutants (carbon monoxide, sulfur dioxide, nitrogen oxides and particulate matter, expressed in kilograms per capita) using spatial dynamic shifts-share method. In details, this tool is used to analyse the pace of change in air pollution in subregions, by category of pollutant and region, as well as for all subregions as a whole (the reference area). The study also analyses each subregion’s share and identifies structural and regional (local and spatial) factors in the volume of the net effect (overall pollution in Poland). It also takes into consideration a spatial weights matrixes, which allows to include spatial aspects in the study. However, due to the multidirectional cross-border nature of the pollution different types of matrixes were applied (based on the contiguity order of subregions and on estimated spatial trends of the emitted quantity of pollutants). The study uses elements of exploratory spatial data analysis.
Źródło:
Ekonomia i Środowisko; 2014, 2; 191-209
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of a quantitative multiple criteria decision making (MCDM-1) approach to the analysis of investments in construction
Autorzy:
Ustinovichius, L.
Zavadskas, E. K.
Podvezko, V.
Powiązania:
https://bibliotekanauki.pl/articles/969718.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
decision-making
quantitative methods
weights of criteria
multiple criteria evaluation
estimation of efficiency of investments
Opis:
The paper considers major principles of methods based on quantitative measurements. The problem of construction investments is of paramount importance because they determine the potential of construction and the structure of expenses. The calculation of investments is an expensive tool of enterprise management used in planning the investments. It can be perceived as the harmonization and evaluation of the models for investment decision-making. Methods based on a single criterion can hardly be used in solving the problems associated with sophisticated technological or marketing systems. It is a multiple attribute decision method, taking into consideration major efficiency criteria, that enables the effective methods of solving complicated problems. When the quantitative criteria are precisely defined, the developed quantitative multiple criteria decision making (MCDM-1) method can be successfully applied. The present paper is devoted to the analysis of the algorithm and methods of application of the suggested technique.
Źródło:
Control and Cybernetics; 2007, 36, 1; 251-268
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
APPLICATION OF EPSILON METHOD TO MODELING EXPECTATIONS IN CONSTRUCTION
Autorzy:
Nehrebecka, Natalia
Grudkowska, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/972835.pdf
Data publikacji:
2009
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
Epsilon method
relative weights
construction
Opis:
The epsilon method has been applied to examine the strength of relations among selected objective and subjective factors connected with a manager’s predictions of their companies’ development. The aim of this research was to study which variable has the strongest impact on business expectations in construction. The results offer compelling evidence that respondents rely both on their current opinion on enterprise as well as on general economic situation. The survey was carried out based on Polish data from 2000:1 to 2008:10.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2009, 10, 1; 176-184
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calderón-Zygmund operators and unconditional bases of weighted Hardy spaces
Autorzy:
García-Cuerva, J.
Kazarian, K.
Powiązania:
https://bibliotekanauki.pl/articles/1290466.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
wavelets
splines
$H^p$ spaces
$A_p$ weights
Schauder and unconditional bases
Opis:
We study sufficient conditions on the weight w, in terms of membership in the $A_p$ classes, for the spline wavelet systems to be unconditional bases of the weighted space $H^p(w)$. The main tool to obtain these results is a very simple theory of regular Calderón-Zygmund operators.
Źródło:
Studia Mathematica; 1994, 109, 3; 255-276
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterisation and dissolution properties of ketoprofen in binary solid dispersion with chitosan
Autorzy:
Grimling, Bożena
Górniak, Agata
Meler, Jan
Szcześniak, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1035185.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
different molecular weights of chitosan
dissolution
ketoprofen
solid dispersion prepared solvent evaporation
Opis:
BCS class II includes drugs with low solubility and high permeability. Ketoprofen is an example of this class of drugs. The aim of the study was to investigate the effect of chitosan with average molecular weights in various formulations on the dissolution of ketoprofen incorporated into this polymer carrier. The study investigated ketoprofen in solid dispersions using a method of the solvent evaporations at the drug to polymer ratios of 1:9. 3:7, and 5:5. The highest dissolution of fenofibrate, amounting to 98.8%, was observed after 60 minutes from solid dispersions with a drug-polymer weight ratio 1:9 in the presence of chitosan B and was 32-times higher in relation to the amount of added polymer in comparison to the solubility of pure drug. DSC and IR investigations showed that ketoprofen remained in its crystalline state in solid dispersion. There was no change in the chemical structure of the drug after the incorporation of the drug onto the polymer. Chitosan has been proposed as a useful excipient for enhancing the bioavailability of poorly water-soluble compounds.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2014, 19; 23-31
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Circular weights in Przeworsk culture – fishnet sinkers or elements of a looms. An attempt of interpretation
Autorzy:
Niezabitowska-Wiśniewska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/1385915.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
European Barbaricum
Roman and Migration Periods
Przeworsk culture
circular weights
weaving
loom
fishing
sinkers
experimental archaeology
ethnographic sources
Opis:
Clay circular weights are most often interpreted as sinkers for fishing nets or weaving weights – an elements of the vertical warp-weighted looms. The starting point for writing this article was the presence of such specimens at four settlements of the Przeworsk culture located on the right side of the Vistula River (Dobre, Nieszawa Kolonia, Oronne, Puławy-Włostowice). The oldest circular weights are dated back to the Neolithic period. With varying intensity, they are also recorded within the sites of all subsequent periods and in various parts of Europe. The youngest are related to the Middle Ages and Modern Age. The article focuses mainly on circular weights from the Roman Period and the early phase of the Migration Period (Przeworsk culture, Wielbark culture, Masłomęcz group, Luboszyce culture / Elbe circle), also using chronologically and culturally different analogies, as well as the results of experimental archaeology, iconographic and ethnographic sources. Circular weights were analysed for the possibility of relating them with weaving and / or fishing. In the first case, I focus on the analysis of factors such as: the context of the discovery, the number and condition of the weights, as well as their shape, weight and the presence of use-wear traces. In the second, issues such as raw material, accuracy and method of production, as well as weight, place and context of discovery, accompanying artefacts were considered.
Źródło:
Acta Archaeologica Carpathica; 2020, 55; 137-196
0001-5229
2719-4841
Pojawia się w:
Acta Archaeologica Carpathica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of accuracy of selected methods of building of combined forecasts and meta-forecast
Autorzy:
Perzyńska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/424861.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
individual forecasts
combined forecasts
meta-forecasts
forecasts errors
forecasts weights
Opis:
In this paper the author presents a method of building a meta-forecast as an arithmetic mean of the combined forecasts set by various methods. The empirical example, in which the forecasts (individual, combined and meta-forecasts) are determined for the microeconomic variable with seasonal fluctuations, is the illustration of theoretical considerations. The accuracy of meta-forecasts is compared with the accuracy of their component combined forecasts and individual forecasts. The empirical studies confirm the usefulness of meta-forecasts. In most cases, they have lower errors than their component combined forecasts, also they are more accurate than individual forecasts.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 1(39); 152-161
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational Analysis of Screening Unit of Paper Plant with Human Error Using Neural Network Approach
Autorzy:
Sharma, Neelam
Gupta, Ritu
Batra, C. M.
Ekata, Ekata
Powiązania:
https://bibliotekanauki.pl/articles/1159859.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Neural Network
cost factor
neural weights
non-reliability
reliability
Opis:
Recent approach of Neural Network can be applied to solve a wide range of optimization problems. This paper deals with reliability, non-reliability and profit analysis of a paper plant. The objective of this paper is to compute profit of paper plant using neural network Algorithm and to analyze the availability of the system. The system is divided into four main subsystems. A multi-layered neural network model is used in order to optimize the maintenance of the paper plant system. The system may fail due to hardware failure with human errors and various environmental conditions. All types of failures, repairs and waiting rates are exponential. System state probabilities and other parameters are developed for the proposed model using neural network approach. Numerical examples are included to demonstrate the results.
Źródło:
World Scientific News; 2018, 113; 226-237
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development-steps of a within Europe and across-country cooperation in the field of milk-production and dairy-cattle-breeding by an example of an initiative of Osnabrücker Herdbuch with the county of Ostroleka
Rozwój - etapy współpracy w Europie i w skali całego kraju na obszarze produkcji mleka i hodowli krów mlecznych na przykładzie inicjatywy Osnabrücker Herdbuch z powiatem Ostrołęka
Autorzy:
Büschken, Klaus
Rzepinski, Witold
Powiązania:
https://bibliotekanauki.pl/articles/2166757.pdf
Data publikacji:
2017-12-15
Wydawca:
Ostrołęckie Towarzystwo Naukowe
Tematy:
economic weights of selection traits
breeding goal
breeding program
cooperation in breeding programs
transfer of genetic progress
balance of genetic
and environmental input
ekonomiczne znacznie wyboru cechy
cele hodowlane
współpraca w zakresie programów hodowlanych
program hodowlany
transfer w zakresie postępu genetycznego
równowaga pomiędzy potencjałem genetycznym a środowiskowym
Opis:
In the following article the cooperation between a German and a Polish organization will be exemplarily demonstrated. This cooperation consists of a longterm, planned development of a unique use of genetic resources in the field of cattle breeding. First, there was an intensive approach of the two organizations and the involved persons by twofold visits, repeated excursions of groups of farmers from Poland and by giving various lectures by experts from Osnabrück in the county of Ostrołęka, in which the trends of the economic conditions for the breeding-work in Germany, the resulting trends within the breeding programs and within the management routines for dairy cattle has been brought to notice to a very interested audience. From this exchange of experience and from the mutual visits resulted a confidence for a long lasting cooperation. This intensive European relationship across the border of countries surely has some kind of model-character for the special and direct relations, which resulted from the gentle development of the approach and which enabled many friendly and fellow-man relationships – never to forget.
W niniejszym artykule przedstawiono współpracę pomiędzy organizacją niemiecką i polską jako przykład modelowej współpracy. Współpraca ta obejmuje długoterminowy, planowany rozwój unikalnego zastosowania zasobów genetycznych w zakresie hodowli bydła. Po pierwsze, odnotowano intensywne podejście dwóch organizacji i zaangażowanie osób poprzez wizyty składane dwukrotnie, powtarzane wycieczki grup rolników z Polski i liczne wykłady wygłaszane przez ekspertów z Osnabrück na terenie powiatu Ostrołęka, w czasie których przedstawiono trendy warunków ekonomicznych dla prac związanych z hodowlą w Niemczech, trendy w programach hodowli i w ramach zarządzania rutynowymi czynnościami w odniesieniu do krów mlecznych. Zostało to skierowane do wiadomości odbiorców szczególnie zainteresowanych tą tematyką. Wymiana doświadczeń i obopólne wizyty zaowocowały długoterminową, trwałą współpracą. Wspominana intensywna relacja europejska, międzynarodowa współpraca z pewnością ma charakter modelowy dla relacji wyjątkowej i bezpośredniej, która wynikała z łagodnego podejścia i umożliwiała powstanie wielu przyjacielskich i partnerskich relacji, które nie zostaną zapomniane.
Źródło:
Zeszyty Naukowe Ostrołęckiego Towarzystwa Naukowego; 2017, Zeszyt, XXXI; 411-420
0860-9608
Pojawia się w:
Zeszyty Naukowe Ostrołęckiego Towarzystwa Naukowego
Dostawca treści:
Biblioteka Nauki
Artykuł
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