With the depletion of fossil fuels, the integration of renewable energy sources as distributed energy resources has become mandatory. However, the uncertainty and intermittent nature of these sources introduce signifi...
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This paper presents two optimized blind equalization algorithms, developed on a real-time digital signal processor (DSP) test bed. The most commonly used group of blind channel equalizers are those based on the Bussga...
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ISBN:
(纸本)9788362065189
This paper presents two optimized blind equalization algorithms, developed on a real-time digital signal processor (DSP) test bed. The most commonly used group of blind channel equalizers are those based on the Bussgang algorithm. By combining a joint algorithm (JA) with a dual-mode (DM) algorithm or a stop-and-go (SAG) algorithm exists the option for optimal matching to the channel behavior. The performance of a single algorithm like modified decision directed modulus (MDDMA), modified constant modulus (MCMA) or the modified decision directed (MDDA) algorithm can only be adapted by adjusting the step size for updating the equalizer tap vector or by changing the number of equalizer taps. Using SAG or DM algorithm introduces a flag (SAG) or a confidence zone (DM) to optimize the algorithm performance further. Combining the joint algorithm within the SAG or DM algorithm yields an optimized algorithm which offers the advantage of the different algorithms. The new algorithms lead to a decrease of the required transmit power by about 22 percent while achieving the same BER. Additional to this, a 6 percent reduction of the processing time is possible relative to MDDMA due to the possibility to reduce the equalizer length.
This article presents results for the design of a fuel injection diagnostic strategy for motor vehicles in Ciudad Juarez, Chihuahua. The first part of this research develops a diagnosis model for the injector MD162524...
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ISBN:
(纸本)9781479922536;9781479922529
This article presents results for the design of a fuel injection diagnostic strategy for motor vehicles in Ciudad Juarez, Chihuahua. The first part of this research develops a diagnosis model for the injector MD162524, implementing Fuzzy Logic. Characterization of the diagnostic model took five injector operation tests (spray pattern, injector opening cycles at 3 revolution levels, electrical resistance measurements in the injector, injector flow at a constant pressure and activation of two levels of pressure in the injector) and 3 possible outcomes of diagnostic status (good shape, repairable, useless). In the final part of the investigation, two evolutionary algorithms are used as a tool to optimize the response of the model designed, generating data sets with decreasing measurement error.
This research focuses on enhancing the thermal conductivity of coir fibre-reinforced polyvinyl chloride (PVC) composites using advanced optimization techniques. While coir fibre adds sustainability and biodegradabilit...
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We study constrained comonotone min-max optimization, a structured class of nonconvexnonconcave min-max optimization problems, and their generalization to comonotone inclusion. In our first contribution, we extend the...
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We study constrained comonotone min-max optimization, a structured class of nonconvexnonconcave min-max optimization problems, and their generalization to comonotone inclusion. In our first contribution, we extend the Extra Anchored Gradient (EAG) algorithm, originally proposed by Yoon & Ryu (2021) for unconstrained min-max optimization, to constrained comonotone min-max optimization and comonotone inclusion, achieving an optimal convergence rate of O (1/T) among all first-order methods. Additionally, we prove that the algorithm's iterations converge to a point in the solution set. In our second contribution, we extend the Fast Extra Gradient (FEG) algorithm, as developed by Lee & Kim (2021), to constrained comonotone min-max optimization and comonotone inclusion, achieving the same O (1/T) convergence rate. This rate is applicable to the broadest set of comonotone inclusion problems yet studied in the literature. Our analyses are based on simple potential function arguments, which might be useful for analyzing other accelerated algorithms.
The paper presents an analysis of the use of optimization algorithms in parallel solutions and distributed computing systems. The primary goal is to use evolutionary algorithms and their implementation into parallel c...
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The paper presents an analysis of the use of optimization algorithms in parallel solutions and distributed computing systems. The primary goal is to use evolutionary algorithms and their implementation into parallel calculations. Parallelization of computational algorithms is suitable for the following cases computational models with a large number of design variables or cases where the objective function evaluation is time consuming (FE analysis). As the software platform for application of distributed optimization algorithms is using MATLAB and BOINC software package.
Popular algorithms of global optimization are reviewed. Comparison of two hybrid algorithms is presented. In particular, consecutive and conveyor hybridization of Artificial bee colony (ABC) and Gravitational Search A...
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ISBN:
(纸本)9781538643075
Popular algorithms of global optimization are reviewed. Comparison of two hybrid algorithms is presented. In particular, consecutive and conveyor hybridization of Artificial bee colony (ABC) and Gravitational Search Algorithm (GSA) is introduced. The analysis of two algorithms work productivity based on spherical function, Rosenbrak, Girvonk, Rastrigin, Shevfel functions is performed. Efficiency of algorithm with conveyor hybridization compared to algorithm with consecutive hybridization is set for determined parameters.
In this work, we proposed novel parametric algorithms for solving large-scale mixed-integer linear and nonlinear fractional programming problems, and illustrate their application in process systems engineering. By dev...
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ISBN:
(纸本)9781479932740
In this work, we proposed novel parametric algorithms for solving large-scale mixed-integer linear and nonlinear fractional programming problems, and illustrate their application in process systems engineering. By developing an equivalent parametric formulation of the general mixed-integer fractional program (MIFP), we propose four exact parametric algorithms based on the root-finding methods, including bisection method, Newton's method, secant method and false position method, respectively, for the global optimization of MIFPs. We also propose an inexact parametric algorithm that can potentially outperform the exact parametric algorithms for some types of MIFPs. Extensive computational studies are performed to demonstrate the efficiency of these parametric algorithms and to compare them with the general-purpose mixed-integer nonlinear programming methods. The applications of the proposed algorithms are illustrated through a case study on process scheduling. Computational results show that the proposed exact and inexact parametric algorithms are more computationally efficient than several general-purpose solvers for solving MIFPs.
This paper proposes a novel optimization method for the A* algorithm to address the search efficiency problem in multi-objective path planning. The approach combines the A* algorithm with an annealing algorithm to enh...
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ISBN:
(纸本)9798350364200;9798350364194
This paper proposes a novel optimization method for the A* algorithm to address the search efficiency problem in multi-objective path planning. The approach combines the A* algorithm with an annealing algorithm to enhance the quality and efficiency of path planning. Specifically, the traditional A* algorithm is improved by reducing the search direction, thereby decreasing the search space complexity and improving search efficiency. Additionally, an annealing algorithm is embedded within the A* framework. The annealing algorithm, based on the principle of simulated annealing, can avoid local optima by accepting inferior solutions with a certain probability. A series of experiments were conducted in a simulated environment, comparing the improved A* algorithm with other standard multiobjective path planning algorithms. The experimental results demonstrate the effectiveness of the proposed method in enhancing the quality of path planning.
The growing global air traffic has necessitated more efficient ground management in airports, especially during peak hours. Current approaches mainly consist of radar-based systems and radio communications, which prov...
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The growing global air traffic has necessitated more efficient ground management in airports, especially during peak hours. Current approaches mainly consist of radar-based systems and radio communications, which provide limited visual assistance. Hence, Decision Support Systems (DSS) are designed to assist human Air Traffic Controllers (ATCos) by providing reliable recommendations based on current data and situations. The Airport Ground Optimizer (AGO) is a DSS designed for ATCos to manage the complexities of ground traffic in airports. It is based on advanced optimization algorithms and intuitive user interfaces, offering an enhanced operational experience. AGO uses mixed-integer programming (AGO-MIP) and stochastic programming (AGO-STC) to detect conflicts based on expected gate release and taxi times, and then optimizes the entire schedule to minimize hold fuels, resolve conflicts, and reduce fuel consumption, emissions, and delay times. Its key strength lies in translating complex mathematical solutions into user-friendly visual representations. AGO's core functionality includes comprehensive visualizations such as position charts, delay graphs, and potential conflict maps, providing a clear, real-time picture of ground operations for informed decision-making. AGO's queue and gate occupancy analysis calculates and visualizes the maximum queue length and concurrent number of aircraft at gates, enhancing airport capacity, reducing aircraft waiting times, and streamlining ground traffic flow. Simulated in a high-traffic Turkish airport layout, AGO-MIP demonstrated significant improvement in operational efficiency compared to traditional First Come First Served (FCFS) approach. AGO outperformed the traditional FCFS approach, reducing hold fuel by 27.9%, cutting delay time by 21.6%, lowering HC, CO, and NOx emissions by 16.4%, 22.5%, and 29.3% respectively, and decreasing the maximum queue length and its duration by 15.3% and 26.6%, as well as decreasing the number
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