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Wyświetlanie 1-15 z 31
Tytuł:
Algebraization of the fundamentals of the theory of accounting systems
Autorzy:
Ginalska, Stefania
Powiązania:
https://bibliotekanauki.pl/articles/747930.pdf
Data publikacji:
1981
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Operations research, mathematical programming
Operations research and management science
Opis:
Praca poświęcona jest omówieniu pewnego ujęcia podstaw teorii systemu kont, wywodzi się z uprawianej przede wszystkim przez T. Pechego i W. Brzezina teorii modeli ewidencyjnych oraz czerpie terminologię (w większej części) z rachunkowości i z myślą o zastosowaniach konstruowanego ujęcia jest napisana.
The article contains no abstract
Źródło:
Mathematica Applicanda; 1981, 9, 17
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical study of the installation of a watercress nectar processor to reduce anemia in adults
Autorzy:
Manrique-Suarez, Luis-Alberto
Ochoa-Sotomayor, Nancy-Alejandra
Salazar-Robles, Héctor-Gavino
Flores-Masías, Edward José
Powiązania:
https://bibliotekanauki.pl/articles/27315583.pdf
Data publikacji:
2023
Wydawca:
STE GROUP
Tematy:
anemia
operations research
productivity
profitability
watercress
Opis:
Peru has a diversity of exotic fruits and plants with recognized yields for food and health protection. Nectars are highly consumed food products, made from fruits or vegetables. The objective for the present work was to carry out the technical study of the installation of a watercress nectar processor to reduce anemia in adults; identify the demand, technical requirements for the operation and profitability of the processing facilities. Methodology. The analytical-synthetic method was used; The population of the target market was analyzed, the size of the sample was determined with the coefficient of variation method, (n = 384), the instrument used was the survey; the technical, economic-financial study was carried out. The results were the growth in the demand for nectars of 59.82%, with respect to the economic-financial evaluation, it has been shown that the results are satisfactory for the installation of the plant, with the economic and financial IRR, both rates proving to be attractive. for the project. From the projected income statement for the 2021-2025 period, it can be deduced that for 2025 there was a net profit of S/316,971.39. Other indicators such as the economic and financial NPV, the B/C ratio and the PRI that were satisfactory for the Project, making its execution viable. The conclusion this study was the technical study for the installation of a nectar processing plant to reduce anemia in adults in Lima, which was viable in terms of operation and profitability, taking advantage of its healing and nutritional properties.
Źródło:
Management Systems in Production Engineering; 2023, 1 (31); 59--70
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelowanie preferencji a zagadnienia zrównoważonego (trwałego) rozwoju
Preferences Modeling and Problems of Sustainable Development
Autorzy:
Rybick, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/593139.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Badania operacyjne
Zrównoważony rozwój
Operations research
Sustainable development
Opis:
In the paper the selected review of main research directions and basic statements from the area of evaluations and comparisons of long-term project is given as well as - questions concerning an adjustment of discounting functions to the "true" fluctuations of individual preferences (in the passage of time) are asked. The above research is carried out in two (complementary) planes. At first the analyses of preorders in sets of infinite sequences of (instantaneous) utilities are shortly reported. The subject of the second part of the article is an identification of the analytical shapes of the "exact" and "justintergenerational" discounting functions.
Źródło:
Studia Ekonomiczne; 2014, 178; 129-159
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Opóźnienia w modelach społecznych dynamiki replikatorowej
Delays in Social Models of Replicator Dynamics
Autorzy:
Jankowski, Robert
Powiązania:
https://bibliotekanauki.pl/articles/593396.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Badania operacyjne
Teoria gier
Game theory
Operations research
Opis:
This paper discusses the impact of delayed information on the social models of replicator dynamic. Internal fixed point is here the optimal decision in the population. Examples and simulations confirm presented results. Here is described both the standard replicator dynamic and the modified model, which assumes that players imitate opponents taking strategies with a higher average payoff in the past. Moreover the model, in which each strategy has its own delay is presented
Źródło:
Studia Ekonomiczne; 2014, 178; 93-107
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementations of interactive multicriteria decision support methods in conditions of risk
Autorzy:
Targiel, K. S.
Powiązania:
https://bibliotekanauki.pl/articles/406463.pdf
Data publikacji:
2012
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
decision support
multicriteria decision making
operations research software tools
Opis:
This paper presents programs which implement the tools for interactive methods of decision support under risk proposed by M. Nowak, as a complementary way to disseminate research results. It also presents a discussion of the appropriateness of implementing quantitative method tools in the form of add-ins to MS Excel.
Źródło:
Operations Research and Decisions; 2012, 22, 3; 55-62
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of a model as a scientific tool of operations research : a methodological approach
Autorzy:
Radosiński, E.
Radosiński, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/406438.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
validation of OR computations
scientific tools of operations research
verification
Opis:
The aim of the research presented in this paper was to solve one of the fundamental problems of modelling and simulation, i.e., verification of a model as a scientific tool of operations research. To attack this problem, certain crucial issues in the philosophy of science (the demarcation problem, the principle of verifiability) must be redefined. In discussing the question of verification, a procedure (the so called RAD-VER procedure) for verifying a model of a microeconomic system, in our case – a firm, is formulated. It is assumed that verification is a ceaseless process of evaluating a model’s scientificity from the standpoints of deductive reasoning, coherency and empiricism. Verification has been divided into two stages: the verification of the assumptions underlying the model of a firm and the verification of the simulator.
Źródło:
Operations Research and Decisions; 2018, 28, 3; 45-62
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Propozycja hybrydy reguł Hurwicza i Bayesa w podejmowaniu decyzji w warunkach niepewności
A Hybrid of the Hurwicz and Bayes Rules in the Decision Making Under Uncertainty
Autorzy:
Gaspars-Wieloch, Helena
Powiązania:
https://bibliotekanauki.pl/articles/590119.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Badania operacyjne
Niepewność
Podejmowanie decyzji
Decision making
Operations research
Uncertainty
Opis:
The Hurwicz rule and the Bayes rule are classical approaches applied in the decision making under uncertainty. This situation occurs when the decision maker may choose one of several alternatives and he or she is only able to assign to each of them an interval of potential payoffs or a set of possible profits. In both cases the answer obtained depends on the state of nature (scenario) which will happen, but in the first case the set of scenarios is infinite and in the second one - it is finite. The Hurwicz measure, with the aid of the coefficient of pessimism and the coefficient of optimism, enables to find the optimal pure strategy when the decision selected is performed only once. Meanwhile the Bayes criterion is designed to indicate the optimal pure or mixed strategy when the variant chosen is performed once or many times. In the first part of the article the author analyzes the Hurwicz rule and illustrates cases when the use of this criterion leads to quite unexpected results which seem to be contradictory with the logic and do not reflect the decision maker's preferences. In the second part a proposal of an approach for optimal pure strategy searching (by means of formulas considering both the coefficients of pessimism and optimism, as well as the whole set of payoffs) is presented. This procedure (H+B rule) combines elements of the Hurwicz criterion and the Bayes criterion, but is deprived of disadvantages typical of the Hurwicz rule. The rule suggested takes into consideration both extreme payoffs and intermediate payoffs, which enables to receive rational recommendations for a larger spectrum of decision problems. The H+B rule may be applied in the decision making process under uncertainty when the number of potential scenarios and the set of possible payoffs are finite, however a slight modification of the equations proposed enables to use this procedure in problems with continuous payoffs.
Źródło:
Studia Ekonomiczne; 2014, 178; 74-92
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System rekomendacji doboru wag kryteriów oparty na ich charakterystyce probabilistycznej
System Supporting the Decision Criteria Weights Specification Based on Their Probabilistic Characteristics
Autorzy:
Brzostowski, Jakub
Roszkowska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/592720.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Badania operacyjne
Negocjacje
Szacowanie prawdopodobieństwa
Negotiations
Operations research
Probability estimation
Opis:
A tool for supporting the negotiator during the process of the analysis of own preferences and the analysis of the preferences of the potential partner is proposed in this work. The approach is based on the construction of the collective preferences model for a selected negotiator's profile in the form of multivariate probability distribution over the space of negotiation issue weights vectors. In the process of user interaction with the system the ranges of issue weights are modified that allows for the decomposition of the general multi-variate distribution into series of uni-variate distributions corresponding to single issues. Such distributions conditionally depend on the issue weight ranges set by the decision-maker for all the remaining issues. Moreover, in the work we consider the possibility of constructing the collective preferences model in a continuous form in the case normally distributed weights for some sets of issues. The data from the Negotiation Support System Inspire [Kersten 1999] were used to examine the normality of the issue weights distribution for different issue sets.
Źródło:
Studia Ekonomiczne; 2014, 178; 58-72
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the law of the iterated logarithm in hybrid multiphase queueing systems
Autorzy:
Minkevičius, Saulius
Powiązania:
https://bibliotekanauki.pl/articles/1181931.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
operations research
model
computer network
queueing network
performance evaluationi
iterated logarithm
Opis:
The model of a hybrid multiphase queueing system (HMQS) has been developed to measure the performance of complex computer networks working under conditions of heavy traffic. Two probability limit theorems (laws of the iterated logarithm, LIL) are presented for a queue length of jobs in HMQS.
Źródło:
Operations Research and Decisions; 2020, 30, 4; 57-64
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of placing the container reloading station by applying the Operations Research methods: a research study
Autorzy:
Stopka, Ondrej
Powiązania:
https://bibliotekanauki.pl/articles/263286.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
intermodal transport
road transport
logistics chain
container reloading station
Operations Research
Opis:
The manuscript is focused on the design of methodical procedure to locate container reloading station of national importance in the examined country. Slovakia represents the investigated country where ten container reloading stations , specialized above all in transshipment of loading units, are currently in operation. The introductory parts of the manuscript outline the most important concepts associated with the very term of intermodal transport, container reloading stations in the given country as well as a brief literature review in a given context. The following parts discuss the specification of relevant data and methods for this study as well as a description of the general procedure of multi-criteria evaluation of alternatives; namely consisting of, identifying a set of alternatives (Slovak regions), establishing a set of criteria and determining the weights of such criteria. The last part of the manuscript addresses forming a criteria matrix and subsequent calculations in order to search for the most suitable region when applying particular techniques of Operations Research. Specifically, the weights of criteria being determined based on the Saaty quantitative pairwise comparison method, and the final procedure in the context of selecting the most suitable alternative is suggested by using the Technique for Order Preference by Similarity to Ideal Solution (also called as the TOPSIS method).
Źródło:
Archiwum Motoryzacji; 2019, 85, 3; 123-136
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MCDM Applications of Near Optimal Solutions in Dynamic Programming
Autorzy:
Trzaskalik, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/578586.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Badania operacyjne
Proces decyzyjny
Programowanie dynamiczne
Decision proces
Dynamic programming
Operations research
Opis:
One of the methods of scalarization of a multi-criteria problem is the application of a quasi-hierarchy, determined by the decision maker. In discrete problems, to apply this method it is necessary to have an algorithm which generates the optimal solution and the consecutive solutions, contained within the tolerance interval determined by the decision maker. This paper presents algorithms generating the consecutive realizations for a multi-stage deterministic decision-making process as well as an algorithm generating the consecutive strategies for a multi-stage stochastic decision- making process. Algorithms using these solutions in a multi-criteria quasi-hierarchical process are also proposed.
Źródło:
Multiple Criteria Decision Making; 2015, 10; 166-184
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Draft model of delivery routes at a city logistics scale when applying the Clarke-Wright method
Autorzy:
Stopka, Ondrej
Powiązania:
https://bibliotekanauki.pl/articles/263262.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
city logistics
Vehicle Routing Problem
Operations Research
urban distribution center
Clarke-Wright method
Opis:
The manuscript deals with the subject of determining the optimal delivery routes in terms of supplying urban distribution centers when minimizing the distance traveled in a particular region for the purpose of addressing city logistics issues using the specific Operations Research method, namely the Clarke-Wright method. Thus, the main paper objective is to examine the issue: what are the optimal transport journeys from the specific object among individual customers in a certain region in order to execute minimum transport performance? First two sections of the manuscript specify the relevant concepts regarding the issue of distribution tasks and vehicle routing problem, and presents data and methods in relation to this research study. The most significant part of the article models the individual routes to determine the optimal interconnections of urban distribution center and their supply from one logistics service center in a regional logistics network at a city logistics scale when applying the Clarke-Wright method. The last sections of the elaborated research study evaluate the major findings and discuss the possible future initiatives in the topic addressed.
Źródło:
Archiwum Motoryzacji; 2020, 87, 1; 67-80
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving the TSAB algorithm through parallel computing
Autorzy:
Rudy, Jarosław
Pempera, Jaroslaw
Smutnicki, Czesław
Powiązania:
https://bibliotekanauki.pl/articles/229535.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
job shop scheduling
parallel computing
operations research
taboo search
TSAB algorithm
coarse-grained parallelization
Opis:
In this paper, a parallel multi-path variant of the well-known TSAB algorithm for the job shop scheduling problem is proposed. Coarse-grained parallelization method is employed, which allows for great scalability of the algorithm with accordance to Gustafon’s law. The resulting P-TSAB algorithm is tested using 162 well-known literature benchmarks. Results indicate that P-TSAB algorithm with a running time of one minute on a modern PC provides solutions comparable to the ones provided by the newest literature approaches to the job shop scheduling problem. Moreover, on average P-TSAB achieves two times smaller percentage relative deviation from the best known solutions than the standard variant of TSAB. The use of parallelization also relieves the user from having to fine-tune the algorithm. The P-TSAB algorithm can thus beused as module in real-life production planning systems or as a local search procedure in other algorithms. It can also provide the upper bound of minimal cycle time for certain problems of cyclic scheduling.
Źródło:
Archives of Control Sciences; 2020, 30, 3; 411-435
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Utilization of Deep Reinforcement Learning for Discrete Resource Allocation Problem in Project Management – a Simulation Experiment
Wykorzystanie uczenia ze wzmocnieniem w problemach dyskretnej alokacji zasobów w zarządzaniu projektami – eksperyment symulacyjny
Autorzy:
Wójcik, Filip
Powiązania:
https://bibliotekanauki.pl/articles/2179629.pdf
Data publikacji:
2022
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
reinforcement learning (RL)
operations research
management
optimisation
uczenie ze wzmocnieniem
badania operacyjne
zarządzanie
optymalizacja
Opis:
This paper tests the applicability of deep reinforcement learning (DRL) algorithms to simulated problems of constrained discrete and online resource allocation in project management. DRL is an extensively researched method in various domains, although no similar case study was found when writing this paper. The hypothesis was that a carefully tuned RL agent could outperform an optimisation-based solution. The RL agents: VPG, AC, and PPO, were compared against a classic constrained optimisation algorithm in trials: “easy”/”moderate”/”hard” (70/50/30% average project success rate). Each trial consisted of 500 independent, stochastic simulations. The significance of the differences was checked using a Welch ANOVA on significance level alpha = 0.01, followed by post hoc comparisons for false-discovery control. The experiment revealed that the PPO agent performed significantly better in moderate and hard simulations than the optimisation approach and other RL methods.
W artykule zbadano stosowalność metod głębokiego uczenia ze wzmocnieniem (DRL) do symulowanych problemów dyskretnej alokacji ograniczonych zasobów w zarządzaniu projektami. DRL jest obecnie szeroko badaną dziedziną, jednak w chwili przeprowadzania niniejszych badań nie natrafiono na zbliżone studium przypadku. Hipoteza badawcza zakładała, że prawidłowo skonstruowany agent RL będzie w stanie uzyskać lepsze wyniki niż klasyczne podejście wykorzystujące optymalizację. Dokonano porównania agentów RL: VPG, AC i PPO z algorytmem optymalizacji w trzech symulacjach: „łatwej”/„średniej”/ „trudnej” (70/50/30% średnich szans na sukces projektu). Każda symulacja obejmowała 500 niezależnych, stochastycznych eksperymentów. Istotność różnic porównano testem ANOVA Welcha na poziomie istotności α = 0.01, z następującymi po nim porównaniami post hoc z kontrolą poziomu błędu. Eksperymenty wykazały, że agent PPO uzyskał w najtrud- niejszych symulacjach znacznie lepsze wyniki niż metoda optymalizacji i inne algorytmy RL.
Źródło:
Informatyka Ekonomiczna; 2022, 1; 56-74
1507-3858
Pojawia się w:
Informatyka Ekonomiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of the enterprise marketing strategy using the operations research
Autorzy:
Pesikov, E.
Zaikin, O.
Bakhtadze, N.
Powiązania:
https://bibliotekanauki.pl/articles/91415.pdf
Data publikacji:
2016
Wydawca:
Warszawska Wyższa Szkoła Informatyki
Tematy:
production system
modeling
optimization
operations research
marketing
target segment
sales volume
price of product
Opis:
It is examined an approach to the analytical tools construction of marketing of the enterprise designed to select the optimal assortment, sales volume, market segments and product prices and based on the use of the operations research methods and optimal software systems. Is proposed a model of nonlinear integer programming with variables of continuous and boolean type, which allows to plan production of existing and new products. To analyse the optimization model is proposed using of heuristic algorithm based on iterative increase in products prices and solution of the linear integer programming task by method of Land and Doig at each step of changing prices.
Źródło:
Zeszyty Naukowe Warszawskiej Wyższej Szkoły Informatyki; 2016, 10, 15; 67-77
1896-396X
2082-8349
Pojawia się w:
Zeszyty Naukowe Warszawskiej Wyższej Szkoły Informatyki
Dostawca treści:
Biblioteka Nauki
Artykuł
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