Showing 761 - 780 results of 974 for search '"integer"', query time: 0.05s Refine Results
  1. 761

    Solution of Extraordinary Differential Equations with Physical Reasoning by Obtaining Modal Reaction Series by Shantanu Das

    Published 2010-01-01
    “…In this formulation of FDE by RL method it is found that there is no need to worry about the fractional initial states; instead one can use integer order initial states (the conventional ones) to arrive at solution of FDE. …”
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  2. 762

    A mathematical model of the location problem for central and secondary warehouses in the multi-level supply chain network of perishable products by Seyyed Mostafa Mousavi, Majid Motamedi, Rasoul Karimi

    Published 2024-03-01
    “…In this research, the four-level supply chain in the field of food products, including the levels of supplier, customer, and central and secondary warehouses, has been investigated. A mixed integer mathematical model of the research problem is presented to minimize chain costs, including the setting up and preparation of warehouses, transportation between transfer levels, and holding products. …”
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  3. 763

    On the number of residues of certain second-order linear recurrences by Accossato, Federico, Sanna, Carlo

    Published 2024-11-01
    “…We generalize this result by showing that $\mathcal{R}(X^2 - a_1 X - 1) = \mathbb{Z}^+$ for every nonzero integer $a_1$. As a corollary, we deduce that for all integers $a_1 \ge 1$ and $k \ge 2$ there exists $\xi \in \mathbb{R}$ such that the sequence of fractional parts $\bigl (\mathrm{frac}(\xi \alpha ^n)\big )_{n \ge 0}$, where $\alpha :=\big (a_1 + \sqrt{a_1^2 + 4}\,\big ) / 2$, has exactly $k$ limit points. …”
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  4. 764

    Assessing the Role of Vaccination in the Control of Hand, Foot, and Mouth Disease Transmission by Zuhur Alqahtani, Mahmoud H. DarAssi, Yousef AbuHour, Areej Almuneef

    Published 2025-01-01
    “…The fractional-order model captures the memory effect in infectious disease dynamics, providing further insight into modeling HFMD transmission compared to a traditional integer-order model. The results would contribute to effective vaccination strategies and public health interventions against HFMD.…”
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  5. 765

    Genetic Algorithm-Based Particle Swarm Optimization Approach to Reschedule High-Speed Railway Timetables: A Case Study in China by Mingming Wang, Li Wang, Xinyue Xu, Yong Qin, Lingqiao Qin

    Published 2019-01-01
    “…In this study, a mixed integer programming model is proposed to address timetable rescheduling problem under primary delays. …”
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  6. 766

    Essential dimension of symmetric groups in prime characteristic by Edens, Oakley, Reichstein, Zinovy

    Published 2024-07-01
    “…The essential dimension $\operatorname{ed}_k(\operatorname{S}_n)$ of the symmetric group $\operatorname{S}_n$ is the minimal integer $d$ such that the general polynomial $x^n + a_1 x^{n-1} + \dots + a_n$ can be reduced to a $d$-parameter form by a Tschirnhaus transformation. …”
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  7. 767

    Simulation of a multi-layered facility location model by cosidering queueing theory by Mahdi Yousefi Nejad Attari, Saeed Kolahi-Randji, Aniseh Neishabouri Jami

    Published 2022-03-01
    “…The proposed model is a nonlinear integer programming model and it is in the field of highly complex problems. …”
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  8. 768

    Graph Pointer Network Based Hierarchical Curriculum Reinforcement Learning Method Solving Shuttle Tankers Scheduling Problem by Xiaoyong Gao, Yixu Yang, Diao Peng, Shanghe Li, Chaodong Tan, Feifei Li, Tao Chen

    Published 2024-12-01
    “…However, conventional approaches like Mixed Integer Linear Programming (MILP) or meta heuristic algorithms often fail in long running time. …”
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  9. 769

    Designing High-Freedom Responsive Feeder Transit System with Multitype Vehicles by Zhengwu Wang, Jie Yu, Wei Hao, Tao Chen, Yi Wang

    Published 2020-01-01
    “…In order to improve the operation of the HFRFT system, the optimization design methods are suggested for vehicle routes, scheduling, and service area. A mixed integer programming model and its hybrid of a metaheuristic algorithm are proposed to efficiently and integrally solve the vehicle routes and scheduling parameters according to the reservation requirements. …”
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  10. 770

    Optimal Scheduling of Energy Storage Systems with Private Ownership Based on a Stochastic-Robust Hybrid Optimization Model in Energy and Ancillary Services Markets by Mohammad Farahani, Abouzar Samimi, Hossein Shateri

    Published 2024-04-01
    “…The proposed formulation based on the Mixed Integer Nonlinear Programming (MINLP) model is implemented in the GAMS software environment and the results demonstrate the maximum profitability of BES in EM (21% more) and also show participation in providing ancillary services, such as reserve to provide security in incidents and reactive power to maintain stability and reduce cost and losses, despite the decrease in profit, leads to neutralizing the negative impact of uncertainties in the BES profit..…”
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  11. 771

    A Multimodal Passenger-and-Package Sharing Network for Urban Logistics by Yuxiong Ji, Yujing Zheng, Jizhou Zhao, Yu Shen, Yuchuan Du

    Published 2020-01-01
    “…Packages are transported by metro on backbone links between the hubs and are carried by taxis or trucks between service stores and hubs, depending on the unit costs of these two modes and capacity constraint of the taxi. A mixed integer linear programming model for hub location problems—fusing the multiassignment p-hub median problem without capacity constraints and the capacitated multiassignment p-hub covering problem—is formulated to optimize the multimodal PPS network. …”
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  12. 772

    A vibration damping optimization algorithm to solve flexible job shop scheduling problems with reverse flows by Esmaeil Mehdizadeh, Fatemeh Soleimaninia

    Published 2023-12-01
    “…The aim is to minimize the makespan of the jobs (the maximum completion time). A Mixed Integer Programming (MIP) is presented to model the problem and the Branch and Bound (B&B) method is used to solve the problem. …”
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  13. 773

    Understanding the Complexity of Temperature Dynamics in Xinjiang, China, from Multitemporal Scale and Spatial Perspectives by Jianhua Xu, Yaning Chen, Weihong Li, Zuhan Liu, Chunmeng Wei, Jie Tang

    Published 2013-01-01
    “…The main conclusions are as follows (1) The integer CD values indicate that the temperature dynamics are a complex and chaotic system, which is sensitive to the initial conditions. (2) The complexity of temperature dynamics decreases along with the increase of temporal scale. …”
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  14. 774

    Two-Stage Optimization Method for the Bearing Layout of Isolated Structure by Yu Dang, GenXiong Zhao, HongTu Tian, Guobao Li

    Published 2021-01-01
    “…Moreover, the cost of the isolation bearing layout should be as low as possible. An integer programming method is adopted to optimize the number of each type of isolator. …”
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  15. 775

    An Optimization Method for the Train Service Network Design Problem by Jie Xiao, Yi Xie, Haowei Yu, Hongying Yan

    Published 2020-01-01
    “…It aims to determine the types of train services to be offered, how many trains of each service are to be dispatched per day (service frequency), and by which train services shipments are to be transported. An integer programming model is proposed to address this problem. …”
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  16. 776

    Optimal PV‐storage capacity planning for rail transit self‐consistent energy systems considering extreme weather conditions by Siyu Guo, Liuyang Cai, Haiyi Wu, Guanghui Song, Li Lin, Yanbo Chen

    Published 2024-12-01
    “…Finally, the model is linearized as mixed‐integer linear programming and solved using Gurobi and the Yalmip toolbox. …”
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  17. 777

    Design Guidelines for Fractional Order Cascade Control in DC Motors: A Computational Analysis on Pairing Speed and Current Loop Orders Using Oustaloup’s Recursive Method by Marta Haro-Larrode, Alvaro Gomez-Jarreta

    Published 2025-01-01
    “…Finding appropriate combinations of fractional exponents is therefore crucial to minimize experimental costs and achieve better dynamic response compared to integer-order cascade control. Additionally, mitigating adverse couplings between speed and current loops remains an underexplored area in fractional-order control design. …”
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  18. 778

    Hypergraph-based resource allocation for Device-to-Device underlay H-CRAN network by Pan Zhao, Wenlei Guo, Datong Xu, Zhiliang Jiang, Jie Chai, Lijun Sun, He Li, Weiliang Han

    Published 2020-08-01
    “…To solve the non-convex mixed integer nonlinear optimization problem, the optimization model is decomposed into two sub-problems, which are all solvable quasi-convex power allocation and non-convex channel allocation. …”
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  19. 779

    A multi-objective robust possibilistic programming approach to designing sustainable and reliable closed-loop supply chain network (case study: aluminum industry) by Sajad Amirian, Maghsoud Amiri, Mohammad Taghi Taghavifard

    Published 2024-08-01
    “…The mathematical model developed in this research is of mixed integer linear programming type, which is implemented in GAMS software to solve it and find Pareto optimal solutions.Findings: The accuracy of the overall performance of the proposed model has been evaluated with four examples (based on the coefficients of the objective functions) from a case study in the aluminium industry. …”
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  20. 780

    A systematic literature review of aggregate production planning (APP): Social and economic perspectives by Wan Yee Leong, Kuan Yew Wong, Ali Anjomshoae

    Published 2025-01-01
    “…Findings: The outcome shows that most of the previous studies applied mixed-integer linear programming (MILP) methods in developing the APP models while stochastic and fuzzy methods are the most common approaches to deal with uncertainties. …”
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