harmonysearch (HS) algorithm is a population-based meta-heuristic algorithm, which is conceptualized using the musical improvisation process of searching for a perfect state of harmony. In this paper, an improved har...
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This paper presents comparison of harmony search algorithm (HSA), improved harmonysearch (IHS) algorithm, Biogeography based optimization (BBO) algorithm for solving constrained economic load dispatch problems in the...
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This paper presents comparison of harmony search algorithm (HSA), improved harmonysearch (IHS) algorithm, Biogeography based optimization (BBO) algorithm for solving constrained economic load dispatch problems in the power system. In the IHS algorithm multiple harmony memory consideration rates and dynamic pitch adjusting rate are used to generate new solution vector. This proposed algorithms have been successfully tested in the test system which consists of twenty generating units with ramp rate limits and valve point loading constraint. The results obtained through the simulation results reveal that IHS algorithm has minimum total fuel cost and has good convergence characteristics when compared to both harmony search algorithm and Biogeography based optimization algorithm.
This paper investigates a new approach to find the optimal location and sizing of Distribution STATic COMpensator (DSTATCOM) with an objective function of minimizing the total network power losses. harmonysearch algo...
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This paper investigates a new approach to find the optimal location and sizing of Distribution STATic COMpensator (DSTATCOM) with an objective function of minimizing the total network power losses. harmony search algorithm is used to find the optimal location and sizing of DSTATCOM. The proposed work is tested on standard IEEE 33-bus radial distribution systems. The obtained result shows that optimal placement and sizing of DSTATCOM in the radial distribution network effectively reduces the total power losses of the system.
The query optimiser is a vital part of any distributed database mechanism. Reducing the execution period of the query depends on reaching an ideal query execution plan. Due to this issue's NP-hard nature, a hybrid...
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The query optimiser is a vital part of any distributed database mechanism. Reducing the execution period of the query depends on reaching an ideal query execution plan. Due to this issue's NP-hard nature, a hybrid harmonysearch and an artificial bee colony algorithm can be useful. The harmony is used to call query plans and signify them by S-dimension real vectors. A harmony memory is a place for creating and storing a primary population of harmony vectors. Then, bees explore harmony memory as a food source. The production of a novel nominate harmony out of all query plans in the harmony memory requires a pitch adjustment principle, a memory consideration one, and a random re-initialisation. Lastly, the new candidate vector replaces the worst harmony vector when it works better. The simulation outcomes have indicated that the introduced method reduces the expenses of evaluating a query compared to the harmonysearch and bee colony optimisation algorithms. However, this method has a longer execution time.
Recent developments designate the quick growing of optimization meta-heuristics in the domain of optimization. Sine-cosine optimizer is a stochastic technique that generates various preliminary random research agents ...
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Recent developments designate the quick growing of optimization meta-heuristics in the domain of optimization. Sine-cosine optimizer is a stochastic technique that generates various preliminary random research agents global optimal solutions and involves them to fluctuate toward or outwards the superior global optima solution utilizing a mathematical model based on sine and cosine trigonometry functions. Nevertheless, standard SCA provides insufficient global optima results on complex dimension functions illustrating poor convergence rate. The search process of the SCA method holds various shortcomings such as slow convergence, weak balance amid exploration and exploitation, and inefficiency in convergence. To overcome these shortcomings in this work, we are trying to present a new heuristic approach based on merging the features of SCA (sine-cosine approach) with a HS (harmonysearch approach) known as HSCAHS algorithm. The existing approach integrates the merits of the sine-cosine algorithm and HS algorithm to reduce demerits, like the trapping in local optima and unbalanced exploitation. The new approach presents own work performance in two different stages;firstly, the sine-cosine algorithm starts the explore procedure to augment exploration capability. Secondly, harmonysearch part starts its search from SCA finds so far to augment the exploitation tendencies. Hence, hybrid approach can find best possible solution in which least time improves the exploitation and exploration. Hence, the newly existing hybrid approach can be quickly convergent, statistically sound and more robust. The capability of the hybrid approach is verified by applying it on eighteen tested benchmark, economic dispatch, three-bar truss design, rolling element bearing design, multiple disc clutch brake design, speed reducer design and planetary gear train design problems. The experimental solutions reveal that the hybrid approach is able to finding the superior quality of optimal goal (or s
harmonysearch(HS) algorithm is a population-based meta-heuristic algorithm,which is conceptualized using the musical improvisation process of searching for a perfect state of *** this paper,an improved harmonysearch...
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ISBN:
(纸本)9781479970186
harmonysearch(HS) algorithm is a population-based meta-heuristic algorithm,which is conceptualized using the musical improvisation process of searching for a perfect state of *** this paper,an improved harmony search algorithm with perturbation strategy is proposed to enhance the global and local search ability of HS algorithm.A perturbation strategy is presented to improve global search *** opposition-based learning is used to replace pitch adjustment,which aims to enhance local search *** addition,elite memory is designed to further escape local *** results indicated that the proposed IHSP algorithm has better performance than the state-of-the-art HS algorithms.
This paper presents a novel hybrid data clustering algorithm based on parameter adaptive harmonysearch *** recently developed parameter adaptive harmony search algorithm(PAHS) is used to refine the cluster centers,wh...
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This paper presents a novel hybrid data clustering algorithm based on parameter adaptive harmonysearch *** recently developed parameter adaptive harmony search algorithm(PAHS) is used to refine the cluster centers,which are further used in initializing Expectation-Maximization clustering *** optimal number of clusters are determined through four well-known cluster validity *** proposed algorithm is evaluated on three real life datasets and compared with the performance of K-Means,Fuzzy CMeans and HS initialize EM(HSEM).Experimental results reveal that the proposed approach provide better results in terms of precision,recall,weighted average,F-Measure and G-Measure.
Low connectivity is a challenging problem in wireless communication sensor networks with non-uniform sensor node densities. Reliable information transmission requires the full connectivity of the network because of th...
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Low connectivity is a challenging problem in wireless communication sensor networks with non-uniform sensor node densities. Reliable information transmission requires the full connectivity of the network because of the multi-hop communication of wireless sensor networks. A network is fully connected if each pair of nodes can communicate with each other, either directly or through intermediate relay nodes. The current study presents a harmonysearch (HS) algorithm to improve the connectivity of the non-uniform density wireless sensor networks. HS is a meta-heuristic algorithm, which mimics the actions of harmonizing musical instruments, including memory-based, random, and pitch-adjusted play, during improvisation. In the present work, HS is used to optimize the phase shift parameters of sensors node inside the cluster to ensure maximum radiation field at the reception point. This process results in a significant increase in the coverage area of cluster nodes, consequently increasing network connectivity.
harmonysearch (HS) algorithm is a new population-based meta-heuristic which imitates the music improvisation process and has been successfully applied to a variety of combination optimization problems. In this paper,...
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harmonysearch (HS) algorithm is a new population-based meta-heuristic which imitates the music improvisation process and has been successfully applied to a variety of combination optimization problems. In this paper, a self-adaptive harmony particle swarm optimization searchalgorithm, named SHPSOS, is proposed to solve global continuous optimization problems. Firstly, an efficient initialization scheme based on the PSO algorithm is presented for improving the solution quality of the initial harmony memory (HM). Secondly, a new self-adaptive adjusting scheme for pitch adjusting rate (PAR) and distance bandwidth (BW), which can balance fast convergence and large diversity during the improvisation step, are designed. PAR is dynamically adapted by symmetrical sigmoid curve, and BW is dynamically adjusted by the median of the harmony vector at each generation. Meanwhile, a new effective improvisation scheme based on differential evolution and the best harmony (best individual) is developed to accelerate convergence performance and to improve solution accuracy. Besides, Gaussian mutation strategy is presented and embedded in the SHPSOS algorithm to reinforce the robustness and avoid premature convergence in the evolution process of candidates. Finally, the global convergence performance of the SHPSOS is analyzed with the Markov model to testify the stability of algorithm. Experimental results on thirty-two standard benchmark functions demonstrate that SHPSOS outperforms original HS and the other related algorithms in terms of the solution quality and the stability. (C) 2015 Elsevier Ltd. All rights reserved.
The purpose of multi-objective optimization is to simultaneously optimize several objective functions that are usually in conflict with each other. An acceptable solution is one that can strike a trade-off between the...
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The purpose of multi-objective optimization is to simultaneously optimize several objective functions that are usually in conflict with each other. An acceptable solution is one that can strike a trade-off between the results of these functions. Although, multi-objective evolutionary algorithms have a good history in solving multi-objective problems, how to find more accurate and diverse solutions set at an acceptable time is still a challenge. In this study, a quantum-inspired multi-objective harmony search algorithm is proposed to solve multi-objective optimization problems. In this algorithm, a new quantum mutation strategy is proposed, which is a combination of harmony improvisation operators and a quantum adaptive rotation gate. While the use of the rotation gate leads to the move to further solutions and complete coverage of the problem space, the improvisation operators (PAR and BW) trigger tiny impulses and mutate into neighbor solutions. The advantage of such an algorithm is to strengthen the balance between the exploration and exploitation processes. Also, the crowding distance metric of the elitism strategy ensures the production of solutions with maximum variety in the problem space. The results of the implementation of this algorithm on multi-objective benchmark functions indicate significant improvement in criteria such as the distance to Pareto optimal, the scattering, and the convergence rate compared to the state-of-the-art methods.
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