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Wyświetlanie 1-15 z 86
Tytuł:
Example of the Application of the Use of the Case Points Method
Autorzy:
Wolski, M.
Pilski, M.
Powiązania:
https://bibliotekanauki.pl/articles/93011.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
use case point method
UCP
project estimation
Opis:
This text is the second one of the series of articles concerning projects estimation using the function points method. In the first part entitled: “Theoretical Aspects of Projects Estimation Using the Use Case Points Method" theoretical aspects of the function points method have been presented. Here, an example along with mathematical calculations will be discussed. Whilst in the part three entitled: "Project Estimation Using the Use Case Points Method When Using Enterprise Architect", a practical application of the function points method in Enterprise Architect have been presented.
Źródło:
Studia Informatica : systems and information technology; 2010, 1-2(14); 47-56
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Note on the stability of first order linear differential equations
Autorzy:
Bojor, F.
Powiązania:
https://bibliotekanauki.pl/articles/255364.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fixed point method
differential equation
Hyers-Ulam stability
Opis:
In this paper, we will prove the generalized Hyers-Ulam stability of the linear differential equation of the form y'(x)+f (x) y(x)+g(x) = 0 under some additional conditions.
Źródło:
Opuscula Mathematica; 2012, 32, 1; 67-74
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of silo discharge and filling problems by the material point method
Autorzy:
Więckowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1955763.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
granular flow
plasticity
viscoplasticity
finite element method
material point method
Opis:
The problems of flow of a granular material is the processes of silo discharge and filling are considered. Dynamic, two-dimensional problems are analyzed, both the plane and axisymmetric ones. The material point method is applied as an analytical tool, a variant of the finite element method capable of solving pertinent equations of motion on an arbitrary computational element mesh and tracing state variables at material points chosen independently of the mesh. The mechanical behaviour of a granular material is described with non-associative elastic-perfectly plastic and elastic-viscoplastic material models with the Drucker-Prager yield condition. The influence of friction between the flowing granular body and silo walls is taken into account. The material point method enables one to analyze silos of arbitrary shapes, including silos with inserts controlling the flow of the stored material. The mass and funnel types of flows are analyzed.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 4; 701-721
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Aspects of Projects Estimation Using the Use Case Points Method
Autorzy:
Wolski, M.
Pilski, M.
Powiązania:
https://bibliotekanauki.pl/articles/92962.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
function points method
use case point method
UCP
project estimation
Opis:
This text is the first one of the series of articles concerning projects’ estimation in Enterprise Architect. In this section, theoretical aspects of function points methods have been presented. Part two entitled: “Example of the Application of the Use of the Case Points Method” constitutes an example along with mathematical calculations and part three entitled: “Project Estimation with the Use of the Method of Use Cases in Enterprise Architect” is a practical application of the function points method in Enterprise Architect.
Źródło:
Studia Informatica : systems and information technology; 2010, 1-2(14); 39-46
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reference Point Method with Importance Weighted Partial Achievements
Autorzy:
Ogryczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/307978.pdf
Data publikacji:
2008
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
aggregation methods
multicriteria decision making
reference point method
WOWA
Opis:
The reference point method (RPM) is based on the so-called augmented max-min aggregation where the worst individual achievement maximization process is additionally regularized with the average achievement. In order to avoid inconsistencies caused by the regularization, we replace it with the ordered weighted average (OWA) which combines all the individual achievements allocating the largest weight to the worst achievement, the second largest weight to the second worst achievement, and so on. Further following the concept of the weighted OWA (WOWA) we incorporate the importance weighting of several achievements into the RPM. Such a WOWA RPM approach uses importance weights to affect achievement importance by rescaling accordingly its measure within the distribution of achievements rather than by straightforward rescaling of achievement values. The recent progress in optimization methods for ordered averages allows us to implement the WOWA RPM quite effectively as extension of the original constraints and criteria with simple linear inequalities.
Źródło:
Journal of Telecommunications and Information Technology; 2008, 4; 17-25
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Project Estimation Using the Use Case Points Method When Using Enterprise Architect
Autorzy:
Wolski, M.
Pilski, M.
Powiązania:
https://bibliotekanauki.pl/articles/93022.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
use case point method
UCP
project estimation
enterprise architect
Opis:
This text is the third one from the series of articles concerning projects estimation in Enterprise Architect. In the first part ("Theoretical Aspects of Projects Estimation Using the Use Case Points Method" - White Paper published on Sparx Systems Enterprise Architect Community Site), theoretical aspects of the function points method have been presented. In the part two entitled: "Example of the Application of the Use Cases Points Method" (White Paper published on Sparx Systems Enterprise Architect Community Site) an example along with mathematical calculations have been discussed. Whereas in this part practical application of the function points method in Enterprise Architect have been presented.
Źródło:
Studia Informatica : systems and information technology; 2010, 1-2(14); 57-65
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reference distribution based decision support platform
Autorzy:
Breja, K.
Ogryczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/308085.pdf
Data publikacji:
2008
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
multiple criteria optimization
decision support systems
reference point method
reference distribution method
Opis:
There many decision problems where numerous partial achievement functions are considered impartially which makes the distribution of achievements more important than the assignment of several achievements to the specific criteria. Such models are generally related to the evaluation and optimization of various systems which serve many users where quality of service for every individual user defines the criteria. This applies to various technical systems, like to telecommunication ones among others, as well as to social systems. An example arises in location theory, where the clients of a system are entitled to equal treatment according to some community regulations. This paper presents an implementation of decision support framework for such problems. This platform is designed for multiple criteria problems analyzed with the reference distribution approach. Reference distribution approach is an extension of the reference point method.
Źródło:
Journal of Telecommunications and Information Technology; 2008, 3; 5-14
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metric regularity under approximations
Autorzy:
Dontchev, A. L.
Veliov, V. M.
Powiązania:
https://bibliotekanauki.pl/articles/970750.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
metric regularity
inexact iterative methods
Newton method
proximal point method
discrete approximation
optimal control
Opis:
In this paper we show that metric regularity and strong metric regularity of a set-valued mapping imply convergence of inexact iterative methods for solving a generalized equation associated with this mapping. To accomplish this, we first focus on the question how these properties are preserved under changes of the mapping and the reference point. As an application, we consider discrete approximations in optimal control.
Źródło:
Control and Cybernetics; 2009, 38, 4B; 1283-1303
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A reference point method to triple-objective assignment of supporting services in a healthcare institution
Autorzy:
Sawik, B.
Powiązania:
https://bibliotekanauki.pl/articles/375985.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
reference point method
assignment problem
mixed-integer programming
services operations management
healthcare planning
Opis:
This paper presents an application of mixed integer programming model for optimal allocation of workers among supporting services in a hospital. The services include logistics, inventory management, financial management, operations management, medical analysis, etc. The optimality criterion of the problem is to minimize operational costs of supporting services subject to some specific constraints. The constraints represent specific conditions for resource allocation in a hospital. The overall problem is formulated as a triple-objective assignment model, where the decision variables represent the assignment of people to various jobs. A reference point approach with the Chebyshev metric is applied for the problem solution. The results of computational experiments modeled on a real data from a hospital in Lesser Poland are reported.
Źródło:
Decision Making in Manufacturing and Services; 2010, 4, 1-2; 37-46
1896-8325
2300-7087
Pojawia się w:
Decision Making in Manufacturing and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On nonlocal problems for fractional differential equations in Banach spaces
Autorzy:
Dong, X.
Wang, J.
Zhou, Y.
Powiązania:
https://bibliotekanauki.pl/articles/255742.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
nonlocal problems
fractional differential equations
existence
generalized singular Gronwall inequality
fixed point method
Opis:
In this paper, we study the existence and uniqueness of solutions to the nonlocal problems for the fractional differential equation in Banach spaces. New sufficient conditions for the existence and uniqueness of solutions are established by means of fractional calculus and fixed point method under some suitable conditions. Two examples are given to illustrate the results.
Źródło:
Opuscula Mathematica; 2011, 31, 3; 341-357
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interior Point Method Evaluation for Reactive Power Flow Optimization in the Power System
Ocena możliwości wykorzystania metody punktu wewnętrznego do optymalizacji rozpływu mocy biernej w systemie elektroenergetycznym
Autorzy:
Lubośny, Z.
Dobrzyński, K.
Klucznik, J.
Powiązania:
https://bibliotekanauki.pl/articles/397594.pdf
Data publikacji:
2013
Wydawca:
ENERGA
Tematy:
optymalizacja rozpływu mocy biernej
metoda punktu wewnętrznego
reactive power flow optimization
interior point method
Opis:
The paper verifies the performance of an interior point method in reactive power flow optimization in the power system. The study was conducted on a 28 node CIGRE system, using the interior point method optimization procedures implemented in Power Factory software.
W artykule poddano weryfikacji metodę punktu wewnętrznego pod kątem jej wykorzystania do optymalizacji rozpływu mocy biernej w systemie elektroenergetycznym. Rozważania przeprowadzono na 28-węzłowym systemie CIGRE, z wykorzystaniem zaimplementowanej metody punktu wewnętrznego w programie Power Factory firmy DIgSILENT.
Źródło:
Acta Energetica; 2013, 1; 90-101
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A reference point approach to bi-objective dynamic portfolio optimization
Autorzy:
Sawik, B.
Powiązania:
https://bibliotekanauki.pl/articles/375931.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
dynamic portfolio
mixed-integer programming
reference point method
bi-objective optimization
value-at-risk
Opis:
The portfolio selection problem presented in this paper is formulated as a bi-objective mixed integer program. The portfolio selection problem considered is based on a dynamic model of investment, in which the investor buys and sells securities in successive investment periods. The problem objective is to dynamically allocate the wealth on different securities to optimize by reference point method the portfolio expected return and the probability that the return is not less than a required level. In computational experiments the dataset of daily quotations from the Warsaw Stock Exchange were used.
Źródło:
Decision Making in Manufacturing and Services; 2009, 3, 1-2; 73-85
1896-8325
2300-7087
Pojawia się w:
Decision Making in Manufacturing and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwości wykorzystania metody punktu wewnętrznego do optymalizacji rozpływu mocy biernej w systemie elektroenergetycznym
Interior point method evaluation for reactive power flow optimization in the power system
Autorzy:
Lubośny, Z.
Dobrzyński, K.
Klucznik, J.
Powiązania:
https://bibliotekanauki.pl/articles/267231.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
optymalizacja rozpływu mocy biernej
metoda punktu wewnętrznego
reactive power flow optimization
interior point method
Opis:
W referacie poddano weryfikacji metodę punktu wewnętrznego pod kątem jej wykorzystania do optymalizacji rozpływu mocy biernej w systemie elektroenergetycznym. Rozważania przeprowadzono na 28 węzłowym systemie CIGRE, z wykorzystaniem zaimplementowanej metody punktu wewnętrznego w programie Power Factory firmy DIgSILENT.
The paper verifies an interior point method for reactive power flow optimization in the power system. The study was conducted on 28 node CIGRE system, using the interior point method optimization procedures implemented in Power Factory software.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2013, 32; 31-34
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The MOORA method and its application to privatization in a transition economy
Autorzy:
Brauers, W. K.
Zavadskas, E. K.
Powiązania:
https://bibliotekanauki.pl/articles/969961.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
multi-objective optimization
alternative measurement
discrete alternatives
ratio analysis
sub-objectives
reference point method
Opis:
A new method is proposed for multi-objective optimization with discrete alternatives: MOORA (Multi-Objective Optimization on the basis of Ratio Analysis). This method refers to a matrix of responses of alternatives to objectives, to which ratios are applied. A well established other method for multi-objective optimization is used for comparison, namely the reference point method. Later on, it is demonstrated that this is the best choice among the different competing methods. In MOORA the set of ratios has the square roots of the sum of squared responses as denominators. These ratios, as dimensionless. seem to be the best choice among different ratios. These dimensionless ratios, situated between zero and one, are added in the case of maximization or subtracted in case of minimization. Finally, all alternatives are ranked, according to the obtained ratios. Eventually, to give more importance to an objective, an objective can be replaced by different sub-objectives or a coefficient of importance can be specified. An example on privatization in a transition economy illustrates the application of the method. If application is situated originally in a "welfare" economy, centered on production, MOORA becomes even more significant in a 'wellbeing economy", where consumer sovereignty is assumed.
Źródło:
Control and Cybernetics; 2006, 35, 2; 445-469
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fair and efficient network dimensioning with the reference point methodology
Autorzy:
Goryczak, W.
Wierzbicki, A.
Milewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/308918.pdf
Data publikacji:
2006
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
multiple criteria optimization
efficiency
fairness
equity
reference point method
teleconsultations
network design
elastic traffic
Opis:
The dimensioning of telecommunication networks that carry elastic traffic requires the fulfillment of two conflicting goals: maximizing the total network throughput and providing fairness to all flows. Fairness in telecommunication network design is usually provided using the so-called max-min fairness (MMF) approach. However, this approach maximizes the performance of the worst (most expensive) flows which may cause a large worsening of the overall throughput of the network. In this paper we show how the concepts of multiple criteria equitable optimization can be effectively used to generate various fair and efficient allocation schemes. We introduce a multiple criteria model equivalent to equitable optimization and we develop a corresponding reference point procedure for fair and efficient network dimensioning for elastic flows. The procedure is tested on a sample network dimensioning problem for elastic traffic and its abilities to model various preferences are demonstrated.
Źródło:
Journal of Telecommunications and Information Technology; 2006, 4; 21-30
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 86

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