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Wyszukujesz frazę "threshold strategy" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Recent studies on the Dice Race Problem and its connections
Autorzy:
Louchard, Guy
Powiązania:
https://bibliotekanauki.pl/articles/747324.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
dice game, threshold strategy
gra w kości, wyścigi kości, optymalne zatrzymywanie
Opis:
Następująca wersja gry w kości jest opisana w literaturze. Gracze na zmianę rzucają rzetelną kością sumując swoje wyniki do chwili wystąpienia jednego oczka. Z chwila wystąpienia jednego oczka kumulacja jest zerowana, kolejka kończy się i kostka jest przekazywana przeciwnikowi. W każdej chwili gracz może przerwać grę i odebrać wypłatę równą zebranej liczbie punktów. Zwycięża ten gracz który osiągnie ustaloną, założona wygraną n.W pracy pokazano nowe rezultaty wyznaczające strategie optymalną w grze jedno i dwu osobowej oraz wyliczone prawdopodobieństwa wygranej. W przypadku gry jednoosobowej, wobec braku konkurencji, celem jest osiągnięcie założonego rezultatu przy minimalnej liczbie rzutów w ramach dopuszczalnych strategii.
The following type of dice games has been mentioned and/or studied in the literature. Players take turns in rolling a fair die successively, each player accumulating his or her scores as long as the outcome 1 does not occur. If the result 1 turns up, the accumulated score is wiped out, and the turn ends, that is the player gives the die to the next player. At any stage after a roll, the player (she, say) can choose to end her turn and bank her accumulated score. The winner is the first player to reach some xed target n 2 N. We present some new results on optimal strategies and winning probability in a one or two players game. For just one player there is no competition of course, and in this case we suppose that the player simply wants to minimize her total expected number of tosses over all possible banking strategies.
Źródło:
Mathematica Applicanda; 2016, 44, 1
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of the service strategy in a queueing system with energy harvesting and customers’ impatience
Autorzy:
Dudin, A.
Lee, M. H.
Dudin, S.
Powiązania:
https://bibliotekanauki.pl/articles/331226.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
energy harvesting
threshold strategy
optimization
Markovian arrival process
uzyskiwanie energii
optymalizacja
Markowski proces zgłoszeń
Opis:
A single-server queueing system with an infinite buffer is considered. The service of a customer is possible only in the presence of at least one unit of energy, and during the service the number of available units decreases by one. New units of energy arrive in the system at random instants of time if the finite buffer for maintenance of energy is not full. Customers are impatient and leave the system without service after a random amount of waiting time. Such a queueing system describes, e.g., the operation of a sensor node which harvests energy necessary for information transmission from the environment. Aiming to minimize the loss of customers due to their impatience (and maximize the throughput of the system), a new strategy of control by providing service is proposed. This strategy suggests that service temporarily stops if the number of customers or units of energy in the system becomes zero. The server is switched off (is in sleep mode) for some time. This time finishes (the server wakes up) if both the number of customers in the buffer and the number of energy units reach some fixed threshold values or when the number of energy units reaches some threshold value and there are customers in the buffer. Arrival flows of customers and energy units are assumed to be described by an independent Markovian arrival process. The service time has a phase-type distribution. The system behavior is described by a multi-dimensional Markov chain. The generator of this Markov chain is derived. The ergodicity condition is presented. Expressions for key performance measures are given. Numerical results illustrating the dependence of a customer’s loss probability on the thresholds defining the discipline of waking up the server are provided. The importance of the account of correlation in arrival processes is numerically illustrated.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 2; 367-378
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some equations to identify the threshold value in the DEMATEL method
Autorzy:
Ebrahimi, Seyed Hossain
Powiązania:
https://bibliotekanauki.pl/articles/27315333.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
DEMATEL method
min strategy
max strategy
threshold value
mathematical model
Opis:
DEMATEL technique is a graphical representation method to deal with complex systems. The final analyzed cause and effect categorization would be fundamentally dependent on the threshold value setting. This research is intended to present some mathematical models for calculating the threshold value in the DEMATEL method. The min(max) operator has been intentionally used for considering three equations to identify the threshold value. Additionally, the proposed mathematical equations are gradually developed to gain more useful data to yield a threshold value as well. Particularly, the expert’s initial scoring for building the primary matrix would also be applied in one equation. Results show eliciting an expert’s opinions regarding the value of a threshold value determination leads to setting relatively high thresholds. But, there would be an equation which takes advantage of more data derived from the total influence matrix T. Moreover, a span of different threshold values is gained by making use of the Hamacher t-conorms operator which especially would cause better complexity management of the final total matrix T based on expert’s opinions. As a contribution to this research, threshold value determination is developed mathematically by making use of the direct data gained by the total matrix T. Besides combining data derived from total matrix T, the initial influence direct matrix given by experts, a simpler aggregating procedure and no need for statistical information compared to special Lenth’s method hints at this research’s novelty as well.
Źródło:
Operations Research and Decisions; 2023, 33, 2; 1--22
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elaboration of a strategy to control the peach twig borer Anarsia lineatella Zeller in the Sefrou region in Morocco
Autorzy:
Asfers, A.
Blenzar, A.
Rachdaoui, M.
Joutei, A.B.
Houssa, A.A.
Sekkat, A.
Powiązania:
https://bibliotekanauki.pl/articles/66784.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
control strategy
peach twig borer
Anarsia lineatella
tolerance threshold
Sefrou region
Morocco
Opis:
Trapping by specific sex pheromones initiated in 2009 to monitor three pests, peach twig borer (Anarsia lineatella), oriental fruit moth (Cydia molesta) and plum fruit moth (Grapholita funebrana) revealed the greater importance of peach twig borer in comparison to the others. The results of monitoring the development of larval stages over time and the accumulated degree-days from biofix show that the pest develops five generations per year, one of which undergoes a diapause. In 2009 and 2010 chemical control based on tolerance threshold of 10 males/trap/2 weeks showed unsatisfactory results. With this method, the percentage of affected fruits increased from 6.8% in 2009 to 18.6% in 2010 despite the application of four treatments of organophosphate-based insecticides in 2009 and the application of four treatments in 2010 using active ingredients from different chemical families (pyrethroid, organophosphate and chlorinicotinyl). On the other hand, management of the peach twig borer by the degree-days method tested and planned on the basis of a bifenthrin treatment between 150 to 204 degree-days accumulated from biofix, gave interesting results where the percentage of affected fruits hardly exceeded 0.5% over the four years of study
Źródło:
Journal of Plant Protection Research; 2016, 56, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on preventive maintenance strategy of Coating Machine based on dynamic failure rate
Autorzy:
Gu, Dongwei
Nie, Ruihua
Han, Wenbo
Chen, Guang
Jia, Ligang
Powiązania:
https://bibliotekanauki.pl/articles/24200819.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
dynamic preventive maintenance model
DM
BP-LSTM
dynamic failure rate threshold
preventive maintenance strategy
Genetic-Particle Swarm Optimization
GPSO
Opis:
In this paper, a dynamic preventive maintenance strategy is proposed for the problem of high maintenance cost rate due to excessive maintenance caused by unreasonable maintenance threshold setting when complex electromechanical equipment maintenance strategy is formulated. Increasing failure rate factor and decreasing service age factor are introduced to describe the evolution rules of failure rate during the maintenance of the coating machine, and the BP-LSTM (BP-Long Short Term Memory Network, BP-LSTM) model is combined to predict the failure rate of the coating machine. A Dynamic preventive maintenance Model (DM) that relies on dynamic failure rate thresholds to classify the three preventive maintenance modes of minor, medium and major repairs is constructed. A dynamic preventive maintenance strategy optimization process based on Genetic-Particle Swarm Optimization (GPSO) algorithm with the lowest cost rate per unit time in service phase is built to solve the difficult problem of dynamic failure rate threshold finding. Based on the historical operating data of the coating machine, a case study of the dynamic preventive maintenance strategy of the coating machine was conducted to verify the effectiveness of the model and the developed maintenance strategy proposed in this paper. The results show that the maintenance strategy developed in this paper can ensure better economy and applicability.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 1; atr. no. 20
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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