Bibliographies thématiques / OPTIMAL NUMBERS

Littérature scientifique sur le sujet « OPTIMAL NUMBERS »

Auteur : Grafiati
Publié le 11 septembre 2023

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Articles de revues sur le sujet "OPTIMAL NUMBERS"

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SHOTAKA, Shigeki, Genji YAMAZAKI et Masahiro NAKAMURA. « Optimal Number of Automatic Guided Vehicles in FMS. Lower Bound on the Optimal Numbers. » Transactions of the Japan Society of Mechanical Engineers Series C 63, no 605 (1997) : 285–90. http://dx.doi.org/10.1299/kikaic.63.285.

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Michelin, Sébastien, et Eric Lauga. « Optimal feeding is optimal swimming for all Péclet numbers ». Physics of Fluids 23, no 10 (octobre 2011) : 101901. http://dx.doi.org/10.1063/1.3642645.

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Best, D. J. « Optimal determination of most probable numbers ». International Journal of Food Microbiology 11, no 2 (octobre 1990) : 159–65. http://dx.doi.org/10.1016/0168-1605(90)90051-6.

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Hemalatha, S., et K. Annadurai. « OPTIMIZATION OF A FUZZY INVENTORY MODEL WITH PENTAGONAL FUZZY NUMBERS ». INTERNATIONAL JOURNAL OF MATHEMATICS AND COMPUTER RESEARCH 11, no 03 (9 mars 2023) : 3277–87. http://dx.doi.org/10.47191/ijmcr/v11i3.01.

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This paper explores an optimal replenishment strategy for a two-echelon inventory model which has been considered and analyzed in a fuzzy environment. In fuzzy environment, carrying cost, ordering cost and the replenishment processing cost are assumed to be pentagonal fuzzy numbers. The purpose of this model is to minimize the total inventory cost in fuzzy scenario. There are two inventory models proposed in this paper. Crisp models are developed with fuzzy total inventory cost but crisp optimal order quantity. Fuzzy model is also formulated with fuzzy total inventory cost and fuzzy optimal order quantity. Graded mean integration formula is employed to defuzzify the total inventory cost and the Kuhn–tucker condition is used to determine the optimal order quantity. Finally, we develop an algorithm to obtain the optimal order quantity. A comparison of fuzzy model with classical inventory model is being made. Numerical results highlighting the sensitivity of various parameters are also elucidated. The result illustrates that this fuzzy model can be quite useful in determining the optimal order quantity and minimum total inventory cost.
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Kirkland, Stephen J., Michael Neumann et Nung-Sing Sze. « On optimal condition numbers for Markov chains ». Numerische Mathematik 110, no 4 (26 août 2008) : 521–37. http://dx.doi.org/10.1007/s00211-008-0172-8.

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P. Ghadle, Kirtiwant, et Sanjivani M. Ingle. « Optimal Solution of a Mixed type Fuzzy Transportation Problem ». International Journal of Fuzzy Mathematical Archive 15, no 01 (2018) : 83–89. http://dx.doi.org/10.22457/ijfma.v15n1a8.

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In this paper, we solved transportation problem when the data are in mixed type. Transportation problem contains fuzzy numbers, intuitionistic fuzzy numbers and real numbers. The purpose of our paper is to find the least transportation cost in which cost, supply and demand are mixed fuzzy numbers. This procedure is illustrated with numerical example
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GUO, XIANPING, QIULI LIU et TIANSHOU ZHOU. « OPTIMAL CONTROL OF STOCHASTIC FLUCTUATIONS IN BIOCHEMICAL REACTIONS ». Journal of Biological Systems 17, no 02 (juin 2009) : 283–301. http://dx.doi.org/10.1142/s0218339009002806.

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Different experimental conditions can give rise to changes in rate constants of biochemical reactions, thus resulting in different stochastic fluctuations in the numbers of chemical species molecules. A naturally arising question is how to choose a set of reaction rate constants such that experiment-depending stochastic fluctuations can be optimally controlled. In this paper, we determine the optimal rate constants by optimally controlling stochastic fluctuations in the numbers of chemical species molecules based on the theory of continuous-time Markov decision processes. Specifically, we first propose a stochastic model for a coupled set of biochemical reactions, then solve an optimality problem for rate constants with the mean-maximal numbers of chemical species molecules, and finally find, using a policy iteration algorithm of the continuous-time Markov decision processes, optimal rate constants with the variance-minimal molecule numbers over all possible sets of the rate constants with the maximal-mean molecule numbers obtained.
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Shalen, Peter B. « Small optimal Margulis numbers force upper volume bounds ». Transactions of the American Mathematical Society 365, no 2 (25 juillet 2012) : 973–99. http://dx.doi.org/10.1090/s0002-9947-2012-05657-1.

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Randić, Milan, et Subhash C. Basak. « Optimal Molecular Descriptors Based on Weighted Path Numbers ». Journal of Chemical Information and Computer Sciences 39, no 2 (mars 1999) : 261–66. http://dx.doi.org/10.1021/ci9800763.

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Samuels, Charles L., et Tanner J. Strunk. « Optimal factorizations of rational numbers using factorization trees ». International Journal of Number Theory 11, no 03 (31 mars 2015) : 739–69. http://dx.doi.org/10.1142/s1793042115500402.

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Let mt(α) denote the t-metric Mahler measure of the algebraic number α. Recent work of the first author established that the infimum in mt(α) is attained by a single point [Formula: see text] for all sufficiently large t. Nevertheless, no efficient method for locating [Formula: see text] is known. In this paper, we define a new tree data structure, called a factorization tree, which enables us to find [Formula: see text] when α ∈ ℚ. We establish several basic properties of factorization trees, and use these properties to locate [Formula: see text] in previously unknown cases.
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Thèses sur le sujet "OPTIMAL NUMBERS"

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Fransson, Jonas. « Lower ramification numbers of wildly ramified power series ». Thesis, Linnéuniversitetet, Institutionen för matematik (MA), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-35313.

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In this thesis we study lower ramification numbers of power series tan- gent to the identity that are defined over fields of positive characteristics. Let f be such a series, then f has a fixed point at the origin and the corresponding lower ramification numbers of f are then, up to a constant, the multiplicity of zero as a fixed point of iterates of f. In this thesis we classify power series having ‘small’ ramification numbers. The results are then used to study ramification numbers of polynomials not tangent to the identity. We also state a few conjectures motivated by computer experiments that we performed.
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Li, Tianjian. « On Optimal Survivability Design in WDM Optical Networks under Scheduled Traffic Models ». Wright State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=wright1173975555.

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Pettersson, Lars, et Johansson Christoffer Lundell. « Ant Colony Optimization - Optimal Number of Ants ». Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229764.

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The focus of this thesis paper is to study the impact the number of ants has on the found solution of the Ant Colony Optimization (ACO) metaheuristic when solving the Traveling Salesman Problem. The goal was to find out how the length of the computed tours change for different amounts of ants within a limited number of iterations. To study this, three well known versions of the ACO algorithm were implemented and tested: Min-Max Ant System (MMAS), Elitist Ant System (EliteAS) and Ranked Ant System (RankedAS). The results showed trends that were consistent over several test cases. EliteAS and RankedAS which both utilize specialist ants showed clear signs that the number of specialists had a large influence on the length of solutions. Meanwhile, normal ants did not affect the solutions as much. MMAS and EliteAS only had a small variation on the answer, with lower amount of ants being more favorable. On the other hand, RankedAS performed better by a large margin when working with five specialists and a number of ants equaling the number of cities in the problem.
Målet med denna rapport var att studera hur antalet myror som används av Ant Colony Optimization (ACO) påverkar resultatet vid lö- sandet av Traveling Salesman Problem (TSP). Hur ändras lösningens längd med olika antal myror, när antalet iterationer som får användas är begränsat? För att få fram ett svar på frågan implementerades och testades tre välkända ACO algoritmer: Min-Max Ant System (MMAS), Elitist Ant System (EliteAS) och Ranked Ant System (RankedAS). Efter implementering och utförlig testning så uppdagades trender som var konsistenta över flera testfall. För EliteAS och RankedAS, som bå- da förlitar sig på specialiserade myror, hade antalet specialister en stor påverkan på den funna längden. Normala myror hade istället en liten påverkan på slutresultatet. För MMAS och EliteAS så var skillnaden minimal, med en viss favör mot ett lägre antal myror. RankedAS hade en motsatt trend och hade bäst resultat med fem specialister och lika många normala myror som antalet städer i TSP instansen.
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Bayless, Mark D. « Improving optical character recognition accuracy for cargo container identification numbers ». [Denver, Colo.] : Regis University, 2010. http://adr.coalliance.org/codr/fez/view/codr:139.

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Kouhbor, Shahnaz University of Ballarat. « Optimal number and placement of network infrastructure in wireless networks ». University of Ballarat, 2007. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/12762.

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Wireless Local Area Networks (WLANs) have become a major success in telecommunications during the last few years, due to advantages such as mobility, flexibility, and easier maintenance. A device called an access point (AP) acts as a base station in WLAN for connecting a group of users to the network via radio signal. During the planning of such a network an important problem is to determine the optimal number of these devices and their placement/distribution so that coverage, capacity, and physical security are maximised at minimum cost. In this thesis we are using continuous optimisation techniques to optimise the number of APs and their distribution while cost of deployment is reduced and physical security of the network is enhanced. To find the number and placement of APs, we developed a multi-objective functions model based on path losses and power for free space environments. The two functions in the models are combined by using a balancing parameter. Since it is recognised that some of the objectives can be handled one at a time, in another approach, we followed a step-by-step procedure. We start with a novel optimisation model based on path losses for indoor environments including obstacles. Cost of deployment is saved by finding the minimum number of APs ensuring that the path loss at each test point/receiver is below the given maximum path loss. Next, the physical security of the network is enhanced by placing the APs far from places accessible to unauthorised users to reduce the risk of intrusion into the network. This is achieved in the framework of the model by introducing potential unauthorised users in unauthorised areas for whom coverage is minimised. Due to the presence of obstacles in indoor buildings, the path loss function is discontinuous. Therefore, the objective functions are very complicated and most of the existing optimisation algorithms cannot be applied to solve the problem. We use a global optimisation algorithm that is not used by other researchers to solve the same problem. To validate the accuracy of the optimisation model and performance of the numerical methods, we run tests on several indoor buildings and use wide range of WLAN parameters. The results demonstrate the quality of our model and algorithm. Based on the proposed model and algorithm, we developed a software to assist the network designers in planning wireless LANs.
Doctor of Philosophy
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Kouhbor, Shahnaz. « Optimal number and placement of network infrastructure in wireless networks ». Thesis, University of Ballarat, 2007. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/65892.

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Wireless Local Area Networks (WLANs) have become a major success in telecommunications during the last few years, due to advantages such as mobility, flexibility, and easier maintenance. A device called an access point (AP) acts as a base station in WLAN for connecting a group of users to the network via radio signal. During the planning of such a network an important problem is to determine the optimal number of these devices and their placement/distribution so that coverage, capacity, and physical security are maximised at minimum cost. In this thesis we are using continuous optimisation techniques to optimise the number of APs and their distribution while cost of deployment is reduced and physical security of the network is enhanced. To find the number and placement of APs, we developed a multi-objective functions model based on path losses and power for free space environments. The two functions in the models are combined by using a balancing parameter. Since it is recognised that some of the objectives can be handled one at a time, in another approach, we followed a step-by-step procedure. We start with a novel optimisation model based on path losses for indoor environments including obstacles. Cost of deployment is saved by finding the minimum number of APs ensuring that the path loss at each test point/receiver is below the given maximum path loss. Next, the physical security of the network is enhanced by placing the APs far from places accessible to unauthorised users to reduce the risk of intrusion into the network. This is achieved in the framework of the model by introducing potential unauthorised users in unauthorised areas for whom coverage is minimised. Due to the presence of obstacles in indoor buildings, the path loss function is discontinuous. Therefore, the objective functions are very complicated and most of the existing optimisation algorithms cannot be applied to solve the problem. We use a global optimisation algorithm that is not used by other researchers to solve the same problem. To validate the accuracy of the optimisation model and performance of the numerical methods, we run tests on several indoor buildings and use wide range of WLAN parameters. The results demonstrate the quality of our model and algorithm. Based on the proposed model and algorithm, we developed a software to assist the network designers in planning wireless LANs.
Doctor of Philosophy
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Kouhbor, Shahnaz. « Optimal number and placement of network infrastructure in wireless networks ». University of Ballarat, 2007. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/14597.

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Wireless Local Area Networks (WLANs) have become a major success in telecommunications during the last few years, due to advantages such as mobility, flexibility, and easier maintenance. A device called an access point (AP) acts as a base station in WLAN for connecting a group of users to the network via radio signal. During the planning of such a network an important problem is to determine the optimal number of these devices and their placement/distribution so that coverage, capacity, and physical security are maximised at minimum cost. In this thesis we are using continuous optimisation techniques to optimise the number of APs and their distribution while cost of deployment is reduced and physical security of the network is enhanced. To find the number and placement of APs, we developed a multi-objective functions model based on path losses and power for free space environments. The two functions in the models are combined by using a balancing parameter. Since it is recognised that some of the objectives can be handled one at a time, in another approach, we followed a step-by-step procedure. We start with a novel optimisation model based on path losses for indoor environments including obstacles. Cost of deployment is saved by finding the minimum number of APs ensuring that the path loss at each test point/receiver is below the given maximum path loss. Next, the physical security of the network is enhanced by placing the APs far from places accessible to unauthorised users to reduce the risk of intrusion into the network. This is achieved in the framework of the model by introducing potential unauthorised users in unauthorised areas for whom coverage is minimised. Due to the presence of obstacles in indoor buildings, the path loss function is discontinuous. Therefore, the objective functions are very complicated and most of the existing optimisation algorithms cannot be applied to solve the problem. We use a global optimisation algorithm that is not used by other researchers to solve the same problem. To validate the accuracy of the optimisation model and performance of the numerical methods, we run tests on several indoor buildings and use wide range of WLAN parameters. The results demonstrate the quality of our model and algorithm. Based on the proposed model and algorithm, we developed a software to assist the network designers in planning wireless LANs.
Doctor of Philosophy
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Barkino, Iliam, et Öman Marcus Rivera. « Enough is Enough : Sufficient number of securities in an optimal portfolio ». Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-298462.

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This empirical study has shown that optimal portfolios need approximately 10 securities to diversify away the unsystematic risk. This challenges previous studies of randomly chosen portfolios which states that at least 30 securities are needed. The result of this study sheds light upon the difference in risk diversification between random portfolios and optimal portfolios and is a valuable contribution for investors. The study suggests that a major part of the unsystematic risk in a portfolio can be diversified away with fewer securities by using portfolio optimization. Individual investors especially, who usually have portfolios consisting of few securities, benefit from these results. There are today multiple user-friendly software applications that can perform the computations of portfolio optimization without the user having to know the mathematics behind the program. Microsoft Excel’s solver function is an example of a well-used software for portfolio optimization. In this study however, MATLAB was used to perform all the optimizations. The study was executed on data of 140 stocks on NASDAQ Stockholm during 2000-2014. Multiple optimizations were done with varying input in order to yield a result that only depended on the investigated variable, that is, how many different stocks that are needed in order to diversify away the unsystematic risk in a portfolio.

Osäker på examinatorns namn, tog namnet på den person som skickade mejl om betyg.

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Ju, Heongkyu. « Photon-number squeezing of femtosecond optical pulses in nonlinear media ». Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249632.

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Kitagawa, Akira. « Manipulation of Photon Number-States and Its Linear Optical Realization ». 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147620.

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Livres sur le sujet "OPTIMAL NUMBERS"

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Piunovskiy, A. B. Optimal control of random sequences in problems with constraints. Dordrecht : Kluwer, 1997.

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Coding answers for optimal physician payment. Gaithersburg, Md : Aspen Publishers, 1994.

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Knaus, Gary M. Getting paid for what you do : Coding for optimal reimbursement. 4e éd. Los Angeles, Calif : PMIC, 1997.

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Knaus, Gary M. Getting paid for what you do : Coding for optimal reimbursement. 2e éd. New York : McGraw-Hill, 1991.

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D'Souza, Gerard Eugene. The U.S. soybean processing industry : Optimal size, number, and location. [Muscle Shoals, AL : Tennessee Valley Authority, 1986.

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Sercu, Piet. The optimal number of contracts in cross- or delta-hedges. Kowloon, Hong Kong : City University of Hong Kong, Department of Economics and Finance, 1997.

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D'Souza, Gerard Eugene. The U.S. soybean processing industry : Optimal size, number, and location. [Muscle Shoals, Ala : Tennessee Valley Authority, Office of Agricultural and Chemical Development, 1986.

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D'Souza, Gerard Eugene. The U.S. soybean processing industry : Optimal size, number, and location. [Muscle Shoals, Ala : Tennessee Valley Authority, Office of Agricultural and Chemical Development, 1986.

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C, Kwong Wing, dir. Prime codes with applications to CDMA optical and wireless networks. Boston : Artech House, 2002.

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-C, Chou H., Bowles J et United States. National Aeronautics and Space Administration., dir. Near-optimal operation of dual-fuel launch vehicles. Reston, VA : American Institute of Aeronautics and Astronautics, 1996.

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Chapitres de livres sur le sujet "OPTIMAL NUMBERS"

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Dodunekov, Stefan, et Juriaan Simonis. « Constructions of Optimal Linear Codes ». Dans Numbers, Information and Complexity, 245–63. Boston, MA : Springer US, 2000. http://dx.doi.org/10.1007/978-1-4757-6048-4_21.

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Tichy, Robert F. « Three Examples of Triangular Arrays with Optimal Discrepancy and Linear Recurrences ». Dans Applications of Fibonacci Numbers, 415–23. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5020-0_46.

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Jeschke, Sabina, Gerald Lach, Robert Luce, Olivier Pfeiffer et Erhard Zorn. « Management and Optimal Distribution of Large Student Numbers ». Dans Automation, Communication and Cybernetics in Science and Engineering 2009/2010, 71–84. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-16208-4_6.

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Bassalygo, Leonid, et Mark Pinsker. « Calculation of the Asymptotically Optimal Capacity of a T-User M-Frequency Noiseless Multiple-Access Channel ». Dans Numbers, Information and Complexity, 177–80. Boston, MA : Springer US, 2000. http://dx.doi.org/10.1007/978-1-4757-6048-4_16.

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Singh, M. Kuber. « Application of Triangular Fuzzy Numbers in Taking Optimal Decision ». Dans Inventory Optimization, 219–30. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1729-4_13.

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Maindl, Thomas Ihor, et Jannik Vogel. « Optimal Numbers, Locations, and Configurations of Tower Cranes on Construction Sites ». Dans Operations Research Proceedings 2021, 120–26. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-08623-6_19.

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Kazidenov, Daniyar, Sagyn Omirbekov et Yerlan Amanbek. « Optimal Time-Step for Coupled CFD-DEM Model in Sand Production ». Dans Computational Science and Its Applications – ICCSA 2023 Workshops, 116–30. Cham : Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-37111-0_9.

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AbstractThe coupled Computational Fluid Dynamics and Discrete Element Method (CFD-DEM) is a useful tool for modeling the dynamics of sand production that occurs in oil and gas reservoirs. To perform accurate, physically relevant and efficient calculations, the optimal size of the simulation time-step should be selected. In this study, we investigate the selection of an appropriate time-step interval between CFD and DEM models in sand production simulations. The CPU time, speedup and root mean squared relative error of the obtained results are examined to compare the sand production phenomenon at different coupling numbers. Most of the results including the final sand production rate, bond number and bond ratio indicate that the simulations with coupling numbers of N = 10 and N = 100 produce more accurate results. Moreover, these outcomes demonstrate significant improvements in terms of acceleration of the modeling process.
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Kaur, Jagdeep, et Amit Kumar. « Fuzzy Optimal Solution of Fully Fuzzy Linear Programming Problems with Equality Constraints Having LR Flat Fuzzy Numbers ». Dans An Introduction to Fuzzy Linear Programming Problems, 55–75. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31274-3_4.

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Kaur, Jagdeep, et Amit Kumar. « Fuzzy Optimal Solution of Fully Fuzzy Linear Programming Problems with Inequality Constraints Having LR Flat Fuzzy Numbers ». Dans An Introduction to Fuzzy Linear Programming Problems, 77–108. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31274-3_5.

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Kumar, Amit, Parmpreet Kaur et Jagdeep Kaur. « Fuzzy Optimal Solution of Fully Fuzzy Project Crashing Problems with New Representation of LR Flat Fuzzy Numbers ». Dans Lecture Notes in Computer Science, 171–74. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21881-1_28.

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Actes de conférences sur le sujet "OPTIMAL NUMBERS"

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Aliev, Iskander, et Martin Henk. « s-Frobenius Numbers : Optimal Lower Bound ». Dans Annual International Conference on Computational Mathematics, Computational Geometry & Statistics. Global Science and Technology Forum (GSTF), 2012. http://dx.doi.org/10.5176/2251-1911_cmcgs25.

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Aqeel, Muhammad, M. A. Ansari et Muhammad Affaan. « Optimal Resource Selection by using Fuzzy Numbers ». Dans 2007 International Conference on Electrical Engineering. IEEE, 2007. http://dx.doi.org/10.1109/icee.2007.4287316.

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Jeschke, Sabina, Gerald Lach, Robert Luce, Olivier Pfeiffer et Erhard Zorn. « Management and optimal distribution of large student numbers ». Dans the First Kuwait Conference. New York, New York, USA : ACM Press, 2009. http://dx.doi.org/10.1145/1836029.1836035.

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Gora, Wojtek, Gerald Lach, Jan Lubbe, Olivier Pfeiffer, Erhard Zorn et Sabina Jeschke. « Management and optimal distribution of large student numbers ». Dans 2010 IEEE Education Engineering 2010 - The Future of Global Learning Engineering Education (EDUCON 2010). IEEE, 2010. http://dx.doi.org/10.1109/educon.2010.5492433.

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Ming-Der Yang, Chan-Hsiang Hsu et Tung-Ching Su. « Optimal cluster numbers of unsupervised classification in Minkowski spaces ». Dans 2007 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2007. http://dx.doi.org/10.1109/igarss.2007.4423233.

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Ramli, Suhailywati, et Saiful Hafizah Jaaman. « Optimal solution of fuzzy optimization using pentagonal fuzzy numbers ». Dans PROCEEDING OF THE 25TH NATIONAL SYMPOSIUM ON MATHEMATICAL SCIENCES (SKSM25) : Mathematical Sciences as the Core of Intellectual Excellence. Author(s), 2018. http://dx.doi.org/10.1063/1.5041597.

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Gamou, Satoshi, Koichi Ito et Ryohei Yokoyama. « Analysis of Optimal Unit Numbers and Sizes for Microturbine Cogeneration Systems ». Dans ASME Turbo Expo 2004 : Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53793.

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The relationships between unit numbers and capacities to be installed for microturbine cogeneration systems are analyzed from an economic viewpoint. In analyzing, an optimization approach is adopted. Namely, unit numbers and capacities are determined together with maximum contract demands of utilities such as electricity and natural gas so as to minimize the annual total cost in consideration of annual operational strategies corresponding to seasonal and hourly energy demand requirements. This optimization problem is formulated as a large-scale mixed-integer linear programming one. The suboptimal solution of this problem is obtained efficiently by solving several small-scale subproblems. Through numerical studies carried out on systems installed in hotels by changing the electrical generating/exhaust heat recovery efficiencies, the initial capital cost of the microturbine cogeneration unit and maximum energy demands as parameters, the influence of the parameters on the optimal numbers and capacities of the microturbine cogeneration units is clarified.
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Farano, Mirko, Stefania Cherubini, Jean-Christophe Robinet et Pietro De Palma. « Optimal perturbations in transitional and turbulent flows at moderate Reynolds numbers ». Dans European Conference on Turbomachinery Fluid Dynamics and hermodynamics. European Turbomachinery Society, 2017. http://dx.doi.org/10.29008/etc2017-196.

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Shih, Teng-San, Jin-Shieh Su et Huey-Ming Lee. « Optimal revenue for fuzzy price based on interval-valued fuzzy numbers ». Dans 2009 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE). IEEE, 2009. http://dx.doi.org/10.1109/fuzzy.2009.5277155.

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Goodson, Troy, C. H. Chuang et John Hanson. « Optimal non-impulsive thrust orbit transfers with large numbers of burns ». Dans Guidance, Navigation, and Control Conference. Reston, Virigina : American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-3704.

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Rapports d'organisations sur le sujet "OPTIMAL NUMBERS"

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BILISOLY, ROGER L., et SEAN A. MCKENNA. Determining Optimal Location and Numbers of Sample Transects for Characterization of UXO Sites. Office of Scientific and Technical Information (OSTI), janvier 2003. http://dx.doi.org/10.2172/808599.

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Ayoul-Guilmard, Q., S. Ganesh, M. Nuñez, R. Tosi, F. Nobile, R. Rossi et C. Soriano. D5.3 Report on theoretical work to allow the use of MLMC with adaptive mesh refinement. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.2.002.

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This documents describes several studies undertaken to assess the applicability of MultiLevel Monte Carlo (MLMC) methods to problems of interest; namely in turbulent fluid flow over civil engineering structures. Several numerical experiments are presented wherein the convergence of quantities of interest with mesh parameters are studied at different Reynolds’ numbers and geometries. It was found that MLMC methods could be used successfully for low Reynolds’ number flows when combined with appropriate Adaptive Mesh Refinement (AMR) strategies. However, the hypotheses for optimal MLMC performance were found to not be satisfied at higher turbulent Reynolds’ numbers despite the use of AMR strategies. Recommendations are made for future research directions based on these studies. A tentative outline for an MLMC algorithm with adapted meshes is made, as well as recommendations for alternatives to MLMC methods for cases where the underlying assumptions for optimal MLMC performance are not satisfied.
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Larsson, Madeleine, Karin Tonderski, Genevieve Metson et Nils-Hassan Quttineh. Towards a more circular biobased economy and nutrient use on Gotland : finding suitable locations for biogas plants. Linköping University Electronic Press, juillet 2023. http://dx.doi.org/10.3384/report.diva-194234.

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In this study we have investigated the role of biogas solutions to support increased resource efficiency on the island Gotland, including recovery and redistribution of nitrogen (N) and phosphorus (P) within the agricultural sector. First, we analyzed the potential for expanding energy and nutrient recovery from organic residues using biogas solutions. Our findings suggest that the biogas production could expand to 165 GWh, from the current 36 GWh (2020), with manure accounting for a potential 110 GWh biogas annually if all were digested. Comparing the nutrients contained in organic feedstock with the crop nutrient demand on Gotland showed that for N the demand is 2.4 times higher than the supply. In contrast, the calculations showed a 137 tonnes P surplus, with distinct excess areas in the center and southern part of the island. We then compared scenarios with different numbers (3 - 15) of biogas plants with respect to efficient nutrient redistribution and transport costs. Spatial constraints for new plants, e.g. need for roads with a certain capacity and permit issues, were accounted for by adding local information to a national data set. We identified 104 potential locations (1 km$^2$ grid cells) and used an optimization model to identify the most suitable locations for minimized transport costs. Optimal (meeting the crop demand with no excess) redistribution of all nutrients contained in the feedstock, as raw digestate from biogas plants, would result in an export of 127 tonnes of P from the island. The model results indicated that if all potential feedstock would be digested in three additional biogas plants and nutrients redistributed for optimal reuse, the total transport cost would be 2.6 million SEK annually, excluding the costs for nutrient export from the island (3.7 million SEK). If instead 10 or 15 smaller plants would be built, the transport cost would drop to 1.8 million SEK, with the same amount of P being exported. Comparing the scenarios with different number of biogas plants (3 - 15), showed that some locations are more suitable than others in terms of distance to feedstock and to fields with fertilizer demands. Finally, a preliminary analysis of the amount of crop residues indicated that this type of feedstock could add a substantial amount of biogas production, but more extensive analyses are needed to assess the feasibility to realize part of that potential.
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de Souza, Gustavo, et André Victor D. Luduvice. Optimal unemployment insurance requirements. Federal Reserve Bank of Cleveland, mars 2023. http://dx.doi.org/10.26509/frbc-wp-202210r.

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In the US, workers must satisfy two requirements to receive unemployment insurance (UI): a tenure requirement of a minimum work spell and a monetary requirement of past minimum earnings. Using discontinuity of UI rules at state borders, we find that the monetary requirement decreases the number of employers and the share of part-time workers, while the tenure requirement has the opposite effect. In a quantitative model, the monetary requirement induces workers to stay longer in unemployment because low-paying jobs are not covered by UI. Since it mitigates moral hazard, the optimal UI design has a high monetary requirement.
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Lafrancois, Toben, Mark Hove et Jay Glase. Zebra mussel (Dreissena polymorpha) distribution in Apostle Islands National Lakeshore : SCUBA-based search and removal efforts : 2019–2020. National Park Service, mai 2022. http://dx.doi.org/10.36967/nrr-2293376.

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Invasive zebra mussels (Dreissena polymorpha) were first observed in situ at Apostle Islands National Lakeshore (APIS) in 2015. This report builds on 2018 SCUBA surveys and Environmental Protection Agency (EPA) veliger sampling to: 1) determine whether shoals on APIS borders act as sentinel sites to corroborate veliger drift hypotheses about invasion pathways, 2) evaluate ongoing hand-removal of zebra mussels from easily identified structures, and 3) continue efforts to assess native unionid mussel populations, particularly where zebra mussels are also present. Standard catch per unit effort survey methods by SCUBA teams were used to determine the distribution and relative abundance of zebra or quagga mussels (dreissenids) and native mussels (unionids). Zebra mussels were present at densities between 3 and 42 n/diver/hr (number of mussels per diver per hour), while native unionids were present at densities between 5 and 72 n/diver/hr. Shoal surveys (Eagle Island shoal, Sand Island shoal, York Island shoal, Bear Island shoal, Oak Island shoal, and Gull Island shoal) showed zebra mussels were more abundant on the west side of APIS and absent on the easternmost shoal (Gull Island), corroborating veliger work by the EPA that suggested drift from the Twin Ports of Duluth, Minnesota, and Superior, Wisconsin, is one pathway of invasion. Our results support the use of shallow shoals along the periphery of the park as sentinel sites gauging zebra mussel immigration and population dynamics. Zebra mussel densities in the central islands showed no obvious spatial pattern, and this survey cannot determine whether currents or human transport (or both) are invasion vectors. Given the mussels’ continued presence at heavily used mooring areas and docks where there are no zebra mussels on nearby natural features (e.g., Rocky Island dock, Stockton Island mooring areas), our findings are consistent with multiple invasion pathways (drift from the Twin Ports and anthropogenic sources at mooring areas). SCUBA search and removal of zebra mussels from docks was confirmed to be an effective method for significantly lowering the risk of zebra mussels reproducing and dispersing from these locations. We caution that this work is being done on what look like initial invasions at low densities. Repeated removal of zebra mussels by divers reduced numbers to zero at some sites after one year (South Twin docks, Stockton Island NPS docks, and the Ottawa wreck) or decreased numbers by an order of magnitude (Rocky Island docks). Dreissenid densities were more persistent on the Sevona wreck and longer-term work is required to evaluate removal versus recruitment (local and/or veliger drift). Given the size of the wreck, we have tracked detailed survey maps to guide future efforts. Zebra mussels were again observed attached to native mussels near Stockton Island and South Twin Island. Their continued presence on sensitive native species is of concern. Native unionid mussels were more widely distributed in the park than previously known, with new beds found near Oak and Basswood Islands. The work reported here will form the basis for continued efforts to determine the optimal frequency of zebra mussel removal for effective control, as well as evaluate impacts on native species.
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Gutiérrez, José E. Optimal regulation of credit lines. Madrid : Banco de España, août 2023. http://dx.doi.org/10.53479/33492.

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This paper presents a contract-theoretic model in which banks choose pre-arranged and ex post funding to finance firms’ liquidity needs through credit lines. When liquidity needs are high, pre-arranged funding is key to sustaining lending and reducing the number of firms going into liquidation. Yet, in the presence of a pecuniary externality on firms’ liquidation values, competitive banks choose insufficient pre-funding compared with a constrained social planner. Constrained efficiency can be restored using regulatory liquidity ratios. The optimal regulatory ratio depends on the frequency of high liquidity need conditions, the value lost after a firm’s liquidation, and the premium on pre-funding.
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Edoh, Ayaboe, Ann Karagozian, Charles Merkle et Venkateswaran Sankaran. Investigation of Optimal Numerical Methods for High Reynolds Number Unsteady Simulations (Briefing Charts). Fort Belvoir, VA : Defense Technical Information Center, avril 2014. http://dx.doi.org/10.21236/ada614100.

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Miller, A. C. Jr, E. Bernacki et R. J. Nuspliger. CRADA final report for CRADA number Y1294-0296 : Optical particulate emission monitor. Office of Scientific and Technical Information (OSTI), octobre 1995. http://dx.doi.org/10.2172/395645.

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Kriegel, Francesco. Optimal Fixed-Premise Repairs of EL TBoxes (Extended Version). Technische Universität Dresden, 2022. http://dx.doi.org/10.25368/2022.321.

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Reasoners can be used to derive implicit consequences from an ontology. Sometimes unwanted consequences are revealed, indicating errors or privacy-sensitive information, and the ontology needs to be appropriately repaired. The classical approach is to remove just enough axioms such that the unwanted consequences vanish. However, this is often too rough since mere axiom deletion also erases many other consequences that might actually be desired. The goal should not be to remove a minimal number of axioms but to modify the ontology such that only a minimal number of consequences is removed, including the unwanted ones. Specifically, a repair should rather be logically entailed by the input ontology, instead of being a subset. To this end, we introduce a framework for computing fixed-premise repairs of $\mathcal{EL}$ TBoxes. In the first variant the conclusions must be generalizations of those in the input TBox, while in the second variant no such restriction is imposed. In both variants, every repair is entailed by an optimal one and, up to equivalence, the set of all optimal repairs can be computed in exponential time. A prototypical implementation is provided. In addition, we show new complexity results regarding gentle repairs. This is an extended version of an article accepted at the 45th German Conference on Artificial Intelligence (KI 2022).
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Kempe, M. Optical Materials, Adhesive and Encapsulant, III-V, and Optical Characterization Evaluation : Cooperative Research and Development Final Report, CRADA Number CRD-07-216. Office of Scientific and Technical Information (OSTI), novembre 2012. http://dx.doi.org/10.2172/1056729.

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