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检索条件"任意字段=13th International Conference on Integer Programming and Combinatorial Optimization"

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Optimized provision of minute reserve capacity products by controlled charging of electric vehicles

Optimized provision of minute reserve capacity products by c...

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international conference on European Electricity Market, EEM

作者： Alexander Arnoldt therese Klarner Sabine Ritter Oliver Warweg Energy Business and System Analysis Advanced System Technology Branch of Fraunhofer IOSB Ilmenau Germany

this paper presents an approach for the provision of minute reserve capacity products at the German minute reserve market provided by a pool of electric vehicles. therefore, the requirements of prequalification for market participation have been analyzed and examined with regard to electric vehicle pools. A mixed integer linear programming model has been developed. It ensures the provision and delivery of capacity products in an optimal way, whilst the electric vehicles charging demands are also ensured.

关键词： optimization Load modeling Schedules Mathematical model Plugs Electric vehicles Linear programming

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Mathematical programming Model Concerning City and Urban Traffic

Mathematical Programming Model Concerning City and Urban Tra...

引用

international conference on Soft Computing and Intelligent Systems

作者： Takuya Matsumoto Tsutomu Inamoto Hisashi Tamaki Hyogo Prefectural Institute of Technology Graduate School of System Informatics Kobe University

ISBN: (纸本)9781467327428

the aim of our research is to acquire ideal images of city and urban traffic for various purpose. To achieve the aim, we propose optimization models which consist of city, mobilities and inhabitants. there are two models we are proposed from point of view of accuracy and computation time. One is relatively accurate but takes a lot of time to compute. the other is less accurate, however, larger problems can be computed than the former model. the former model could not solve practical size due to computational time. through computational experiment using extreme evaluation values, validness of latter model is suggested.

关键词： optimization Urban traffic Mixed integer programming

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Certified CNF Translations for Pseudo-Boolean Solving 25

Certified CNF Translations for Pseudo-Boolean Solving

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25th international conference on theory and Applications of Satisfiability Testing, SAT 2022

作者： Gocht, Stephan Martins, Ruben Nordström, Jakob Oertel, Andy Lund University Sweden University of Copenhagen Denmark Carnegie Mellon University PittsburghPA United States

ISBN: (纸本)9783959772426

the dramatic improvements in Boolean satisfiability (SAT) solving since the turn of the millennium have made it possible to leverage state-of-the-art conflict-driven clause learning (CDCL) solvers for many combinatorial problems in academia and industry, and the use of proof logging has played a crucial role in increasing the confidence that the results these solvers produce are correct. However, the fact that SAT proof logging is performed in conjunctive normal form (CNF) clausal format means that it has not been possible to extend guarantees of correctness to the use of SAT solvers for more expressive combinatorial paradigms, where the first step is an unverified translation of the input to CNF. In this work, we show how cutting-planes-based reasoning can provide proof logging for solvers that translate pseudo-Boolean (a.k.a. 0-1 integer linear) decision problems to CNF and then run CDCL. To support a wide range of encodings, we provide a uniform and easily extensible framework for proof logging of CNF translations. We are hopeful that this is just a first step towards providing a unified proof logging approach that will also extend to maximum satisfiability (MaxSAT) solving and pseudo-Boolean optimization in general. © Stephan Gocht, Ruben Martins, Jakob Nordström, and Andy Oertel.

关键词： integer programming

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optimization of the Use of Critical Resources in the Development of Offshore Oil Fields 20th

Optimization of the Use of Critical Resources in the Develop...

引用

20th international conference on Computational Science and Its Applications (ICCSA)

作者： Bassi, Sergio Ronconi, Debora Pretti Univ Sao Paulo Prod Engn Dept BR-05508010 Sao Paulo Brazil

ISBN: (纸本)9783030587994;9783030587987

this paper focuses on a real case of connection of subsea oil wells to offshore platforms using pipe laying support vessels. the objective of this study is to maximize the oil production curve through an optimized use of the out-sourced fleet. Specific features of this scenario are considered, such as technical constraints of each vessel, the availability of the vessels, materials for connection, and the end of the previous phase, called completion. A mixed integer linear programming model is developed considering several constraints that structure this complex situation, among which a relevant characteristic of the problem: the increase of the production curve using injection wells to fight the natural decline of producing wells over time. this mathematical model was tested in small computational instances, showing adequate behavior, which demonstrates that it faithfully represents the situation portrayed and can be used, combined with more advanced computational resources, to achieve better results.

关键词： Oil wells Routing problem Mixed integer linear programming

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the Static Buffer Reshuffling and Retrieval Problem for Autonomous Mobile Robots 15th

The Static Buffer Reshuffling and Retrieval Problem for Auto...

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15th international conference on Computational Logistics (ICCL)

作者： Disselnmeyer, Max Boemer, thomas Pfrommer, Jakob Meyer, Anne Karlsruhe Inst Technol Zirkel 2 D-76131 Karlsruhe Germany TU Dortmund Univ Leonhard Euler Str 5 D-44227 Dortmund Germany

ISBN: (纸本)9783031719929;9783031719936

Buffer zones for moveable shelves or pallets with intermediate products are ubiquitous in production systems to decouple production stages. these buffer zones, usually organized by humans in dense grids, pose a challenge for direct access to all unit loads. To access the retrieval unit load, it often becomes necessary to reshuffle blocking unit loads. When autonomous mobile robots supply production machines without human intervention, their responsibilities encompass both the reshuffling of buffer zones and the transportation of unit loads to production cells adhering to the sequence prescribed by the production plan. this paper introduces the buffer reshuffling and retrieval problem, which is a variant of the block relocation problem known from container terminals at shipyards. We propose an integer programming formulation designed for the static variant of the problem. We created an instance generator with customizable layout sizes and found optimal solutions to solve these instances.

关键词： block relocation problem vehicle routing problem warehouse optimization integer programming

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An innovative and flexible architecture for industrial automation

An innovative and flexible architecture for industrial autom...

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international conference on optimization of Electrical and Electronic Equipment, OPTIM

作者： Alina Gîrbea Constantin Suciu Francisc Sisak Department of Automatics Transilvania University of Brasov Brasov Romania Siemens Corporate Technology Brasov Romania

the paper introduces a novel architecture for industrial automation which addresses both the optimization of manufacturing processes and the ability to react to changes in the market demand. the architecture consists of three main components: a mixed-integer-programming level, a two-layered web service level, and an OPC UA server. the web service layer acts as backbone of the architecture and assures its flexibility and adaptability. Several innovative aspects have been combined to achieve the proposed goals: aggregating UA server, automatic address space generation, and session-based connection management. the functionality of the architecture has been tested through an application based on a flexible assembly system. the results indicate that both objectives are met and the decisions are brought closer to the process. In conclusion the architecture is flexible, easy adaptable, and reusable, it optimizes manufacturing processes and it meets the requirements of the device networking ecosystems.

关键词： Servers Service oriented architecture Computer architecture Computational modeling Java Linear programming

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Variable Neighborhood Search Approach for the Location and Design Problem 9th

Variable Neighborhood Search Approach for the Location and D...

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9th international conference on Discrete optimization and Operations Research (DOOR)

作者： Levanova, Tatyana Gnusarev, Alexander Sobolev Inst Math Omsk Branch Pevtsova Str 13 Omsk 644043 Russia

ISBN: (纸本)9783319449142;9783319449135

In this paper the location and design problem is considered. the point of this is that a Company is going to open markets to attract the largest share of total customers demand. this share varies flexibly depending on the markets location and its design variant. the Company vies for consumers demand with some pre-existing competitors markets. the mathematical model is nonlinear, therefore, there are difficulties in the application of exact methods and commercial solvers for it. the ways of constructing upper bounds of the objective function are described. Two algorithms based on the Variable Neighborhood Search approach are proposed. To study the algorithms a series of test instances similar to the real data of the applied problem has been constructed, experimental analysis is carried out. the results of these studies are discussed.

关键词： Discrete optimization integer programming Upper bound Location problems Variable neighborhood search

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A Maximization Model for Food Aid Distribution using integer Linear programming

A Maximization Model for Food Aid Distribution using Integer...

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international conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment and Management (HNICEM)

作者： Immanuel Jose C. Valencia Elmer P. Dadios Robert Kerwin C. Billones De La Salle University Manila Philippines

ISBN: (纸本)9781665401685

the covid-19 pandemic has severely affected the economy of the Philippines. With 90% of the labor force being affected, hundreds of thousands of families turn to their respective local government units for assistance. LGUs have begun distributing food box assistance to every family under the Food Security Program to ease the economic burden. However, such a program having a vast number of recipients will require a large budget. this study presents the optimization of the content of the food packs used for food aid distribution through linear programming using Matlab. the study's goal is to maximize the nutritional content of the food pack while being under the constraint of a limited budget to ensure the best utilization of scarce resources.

关键词： COVID-19 Pandemics Local government Green products integer linear programming Linear programming Mathematical models

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Multitasked maintenance crews to serve emergency scenarios in electric distribution utilities

Multitasked maintenance crews to serve emergency scenarios i...

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2013 48th international Universities' Power Engineering conference, UPEC 2013

作者： Garcia, Vinicius Jacques Bernardon, Daniel Pinheiro Dhein, Guilherme De Araujo Bassi, Olinto Abaide, Alzenira Neto, Alberto Francisco Kummer Fonini, Julio Daza, Eric Fernando Boeck Federal University of Santa Maria UFSM Brazil AES sul - Power Utility Brazil

ISBN: (纸本)9781479932542

this paper proposes a mathematical model to handle emergency service requests in electric power distribution utilities. Given available maintenance crews and their already assigned service orders, a mathematical model based on mixed integer linear programming is developed to solve the dynamic vehicle routing problem related to the task of deciding which maintenance crew will complete each pending emergency service request. One key aspect refers to the real-time constraint, what means that computational system must be able to handle a solution to the emergency work order dispatch problem with response times in the order of milliseconds or even microseconds. First, the problem definition is presented, followed by preliminary results that have shown how suitable can be the proposed definition when addressing the referred problem and also by using Google Earth plataform. Finally, conclusions point out the main contributions of this work. © 2013 IEEE.

关键词： combinatorial optimization

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On Idle Energy Consumption Minimization in Production: Industrial Example and Mathematical Model 9th

On Idle Energy Consumption Minimization in Production: Indus...

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9th international conference on Operations Research and Enterprise Systems (ICORES)

作者： Benedikt, Ondrej Sucha, Premysl Hanzalek, Zdenek Czech Tech Univ Czech Inst Informat Robot & Cybernet Jugoslavskych Partyzanu 1580-3 Prague Czech Republic Czech Tech Univ Fac Elect Engn Dept Control Engn Karlovo Namesti 13 Prague Czech Republic

ISBN: (纸本)9789897583964

this paper, inspired by a real production process of steel hardening, investigates a scheduling problem to minimize the idle energy consumption of machines. the energy minimization is achieved by switching a machine to some power-saving mode when it is idle. For the steel hardening process, the mode of the machine (i.e., furnace) can be associated with its inner temperature. Contrary to the recent methods, which consider only a small number of machine modes, the temperature in the furnace can be changed continuously, and so an infinite number of the power-saving modes must be considered to achieve the highest possible savings. To model the machine modes efficiently, we use the concept of the energy function, which was originally introduced in the domain of embedded systems but has yet to take roots in the domain of production research. the energy function is illustrated with several application examples from the literature. Afterward, it is integrated into a mathematical model of a scheduling problem with parallel identical machines and jobs characterized by release times, deadlines, and processing times. Numerical experiments show that the proposed model outperforms a reference model adapted from the literature.

关键词： Scheduling Energy optimization Operation Modes Mixed integer Linear programming Parallel Machines

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