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PID Steering Control Method of Agricultural Robot Based on Fusion of Particle Swarm Optimization and Genetic Algorithm 被引量:1
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作者 ZHAO Longlian ZHANG Jiachuang +2 位作者 LI Mei DONG Zhicheng LI Junhui 《农业机械学报》 北大核心 2026年第1期358-367,共10页
Aiming to solve the steering instability and hysteresis of agricultural robots in the process of movement,a fusion PID control method of particle swarm optimization(PSO)and genetic algorithm(GA)was proposed.The fusion... Aiming to solve the steering instability and hysteresis of agricultural robots in the process of movement,a fusion PID control method of particle swarm optimization(PSO)and genetic algorithm(GA)was proposed.The fusion algorithm took advantage of the fast optimization ability of PSO to optimize the population screening link of GA.The Simulink simulation results showed that the convergence of the fitness function of the fusion algorithm was accelerated,the system response adjustment time was reduced,and the overshoot was almost zero.Then the algorithm was applied to the steering test of agricultural robot in various scenes.After modeling the steering system of agricultural robot,the steering test results in the unloaded suspended state showed that the PID control based on fusion algorithm reduced the rise time,response adjustment time and overshoot of the system,and improved the response speed and stability of the system,compared with the artificial trial and error PID control and the PID control based on GA.The actual road steering test results showed that the PID control response rise time based on the fusion algorithm was the shortest,about 4.43 s.When the target pulse number was set to 100,the actual mean value in the steady-state regulation stage was about 102.9,which was the closest to the target value among the three control methods,and the overshoot was reduced at the same time.The steering test results under various scene states showed that the PID control based on the proposed fusion algorithm had good anti-interference ability,it can adapt to the changes of environment and load and improve the performance of the control system.It was effective in the steering control of agricultural robot.This method can provide a reference for the precise steering control of other robots. 展开更多
关键词 agricultural robot steering PID control particle swarm optimization algorithm genetic algorithm
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Path planning of unmanned surface vehicles based on improved particle swarm optimization algorithm with consideration of particle sight distance
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作者 WANG Cheng YANG Junnan +3 位作者 ZHANG Xinyang QIAN Zhong ZHU Ye LIU Hong 《上海海事大学学报》 北大核心 2026年第1期9-19,共11页
To enhance the accuracy of path planning of unmanned surface vehicles(USVs),the particle swarm optimization algorithm(PSO)is improved based on species migration strategies observed in ecology.By incorporating the conc... To enhance the accuracy of path planning of unmanned surface vehicles(USVs),the particle swarm optimization algorithm(PSO)is improved based on species migration strategies observed in ecology.By incorporating the concept of particle sight distance,an improved algorithm,called SD-IPSO,is proposed for the real-time autonomous navigation of USVs in marine environments.The algorithm refines the individual behavior pattern of particles in the population,effectively improving both local and global search capabilities while avoiding premature convergence.The effectiveness of the algorithm is validated using standard test functions from CEC-2017 function library,assessing it from multiple dimensions.Sensitivity analysis is conducted on key parameters in the algorithm,including particle sight distance and population size.Results indicate that compared with PSO,SD-IPSO demonstrates significant advantages in optimization accuracy and convergence speed.The application of SD-IPSO in path planning is further investigated through a 14-point traveling salesman problem(TSP)example and navigation autonomous tests of USVs in marine environments.Findings demonstrate that the proposed algorithm exhibits superior optimization capabilities and can effectively address the path planning challenges of USVs. 展开更多
关键词 particle swarm optimization algorithm(PSO) sight distance unmanned surface vehicle(USV)
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期望因子驱动下的K-means初始聚类中心优化算法研究 被引量:1
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作者 冯鑫 檀丁 李明峰 《现代电子技术》 北大核心 2026年第6期89-93,共5页
合理的初始聚类中心是提升K-means算法聚类效果和避免局部最优的关键。为了确定合理的初始聚类中心,文中提出一种期望因子驱动下的K-means初始聚类中心优化算法。首先,设计期望因子驱动下的网格划分标准来衡量样本点密度因素,并采用欧... 合理的初始聚类中心是提升K-means算法聚类效果和避免局部最优的关键。为了确定合理的初始聚类中心,文中提出一种期望因子驱动下的K-means初始聚类中心优化算法。首先,设计期望因子驱动下的网格划分标准来衡量样本点密度因素,并采用欧氏距离衡量样本点距离因素;其次,引入权重系数约束密度因素和距离因素,综合考虑两种因素以优化初始聚类中心的选取,增强全局搜索能力和提升聚类效果;最后,提出中心相距和的概念来衡量初始聚类中心的优化效果。在UCI数据集Iris、Seeds和Wine上的对比实验结果表明,所提算法的中心相距和相较于传统K-means算法分别减小75%、52%、58%,误差平方和分别减小15%、7%、6%,准确率分别提升20%、19%、24%,性能优于其他改进算法。实验结果证明,所提算法能够有效优化初始聚类中心,提高聚类效果和聚类结果稳定性。 展开更多
关键词 初始聚类中心 优化算法 k-means 期望因子 网格划分 权重系数
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融合K-means聚类与遗传算法的农产品直播电商产地仓选址研究
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作者 李怡萱 王杏 《热带农业工程》 2026年第2期73-79,共7页
在乡村振兴战略与直播电商深度融合背景下,农产品产地仓的科学选址成为降低流通损耗、提升供应链效率的关键,为此,提出了融合K-means聚类算法与遗传算法的两阶段优化方法。首先,通过K-means算法对分散需求点进行空间聚类,筛选出17个备... 在乡村振兴战略与直播电商深度融合背景下,农产品产地仓的科学选址成为降低流通损耗、提升供应链效率的关键,为此,提出了融合K-means聚类算法与遗传算法的两阶段优化方法。首先,通过K-means算法对分散需求点进行空间聚类,筛选出17个备选仓址;然后,基于经济效益最大化目标,综合考量运输成本、建设成本、运营成本及损耗率,构建一个多目标整数规划模型,并利用遗传算法优化选址方案。以W省H县水果产业为例,实证分析表明,本文设计的模型总成本可降至398.3万元,较随机初始化策略节约55.61%,且收敛速度提升18.5%,为农产品供应链数字化转型提供了理论支撑与实践工具。 展开更多
关键词 k-means算法 遗传算法 多目标优化 产地仓 直播电商
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Optimization of the frequency offset increment of FDA-MIMO based on cuckoo search algorithm
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作者 WANG Bo ZHAO Yu +2 位作者 LI Yonglin YANG Rennong XUE Junjie 《Journal of Systems Engineering and Electronics》 2026年第1期157-170,共14页
Frequency diverse array multiple-input multiple-output(FDA-MIMO)radar has gained considerable research attention due to its ability to effectively counter active repeater deception jamming in complex electromagnetic e... Frequency diverse array multiple-input multiple-output(FDA-MIMO)radar has gained considerable research attention due to its ability to effectively counter active repeater deception jamming in complex electromagnetic environments.The effectiveness of interference suppression by FDA-MIMO is limited by the inherent range-angle coupling issue in the FDA beampattern.Existing literature primarily focuses on control methods for FDA-MIMO radar beam direction under the assumption of static beampatterns,with insufficient exploration of techniques for managing nonstationary beam directions.To address this gap,this paper initially introduces the FDA-MIMO signal model and the calculation formula for the FDA-MIMO array output using the minimum variance distortionless response(MVDR)beamformer.Building on this,the problem of determining the optimal frequency offset for the FDA is rephrased as a convex optimization problem,which is then resolved using the cuckoo search(CS)algorithm.Simulations confirm the effectiveness of the proposed approach,showing that the frequency offsets obtained through the CS algorithm can create a dot-shaped beam direction at the target location while effectively suppressing interference signals within the mainlobe. 展开更多
关键词 frequency diverse array multiple-input multiple-output(FDA-MIMO) convex optimization cuckoo search algorithm beampattern
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An Algorithm for Cloud-based Web Service Combination Optimization Through Plant Growth Simulation 被引量:1
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作者 Li Qiang Qin Huawei +1 位作者 Qiao Bingqin Wu Ruifang 《系统仿真学报》 北大核心 2025年第2期462-473,共12页
In order to improve the efficiency of cloud-based web services,an improved plant growth simulation algorithm scheduling model.This model first used mathematical methods to describe the relationships between cloud-base... In order to improve the efficiency of cloud-based web services,an improved plant growth simulation algorithm scheduling model.This model first used mathematical methods to describe the relationships between cloud-based web services and the constraints of system resources.Then,a light-induced plant growth simulation algorithm was established.The performance of the algorithm was compared through several plant types,and the best plant model was selected as the setting for the system.Experimental results show that when the number of test cloud-based web services reaches 2048,the model being 2.14 times faster than PSO,2.8 times faster than the ant colony algorithm,2.9 times faster than the bee colony algorithm,and a remarkable 8.38 times faster than the genetic algorithm. 展开更多
关键词 cloud-based service scheduling algorithm resource constraint load optimization cloud computing plant growth simulation algorithm
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Target maneuver trajectory prediction based on RBF neural network optimized by hybrid algorithm 被引量:13
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作者 XI Zhifei XU An +2 位作者 KOU Yingxin LI Zhanwu YANG Aiwu 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2021年第2期498-516,共19页
Target maneuver trajectory prediction plays an important role in air combat situation awareness and threat assessment.To solve the problem of low prediction accuracy of the traditional prediction method and model,a ta... Target maneuver trajectory prediction plays an important role in air combat situation awareness and threat assessment.To solve the problem of low prediction accuracy of the traditional prediction method and model,a target maneuver trajectory prediction model based on phase space reconstruction-radial basis function(PSR-RBF)neural network is established by combining the characteristics of trajectory with time continuity.In order to further improve the prediction performance of the model,the rival penalized competitive learning(RPCL)algorithm is introduced to determine the structure of RBF,the Levenberg-Marquardt(LM)and the hybrid algorithm of the improved particle swarm optimization(IPSO)algorithm and the k-means are introduced to optimize the parameter of RBF,and a PSR-RBF neural network is constructed.An independent method of 3D coordinates of the target maneuver trajectory is proposed,and the target manuver trajectory sample data is constructed by using the training data selected in the air combat maneuver instrument(ACMI),and the maneuver trajectory prediction model based on the PSR-RBF neural network is established.In order to verify the precision and real-time performance of the trajectory prediction model,the simulation experiment of target maneuver trajectory is performed.The results show that the prediction performance of the independent method is better,and the accuracy of the PSR-RBF prediction model proposed is better.The prediction confirms the effectiveness and applicability of the proposed method and model. 展开更多
关键词 trajectory prediction k-means improved particle swarm optimization(IPSO) Levenberg-Marquardt(LM) radial basis function(RBF)neural network
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Product quality prediction based on RBF optimized by firefly algorithm 被引量:4
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作者 HAN Huihui WANG Jian +1 位作者 CHEN Sen YAN Manting 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2024年第1期105-117,共13页
With the development of information technology,a large number of product quality data in the entire manufacturing process is accumulated,but it is not explored and used effectively.The traditional product quality pred... With the development of information technology,a large number of product quality data in the entire manufacturing process is accumulated,but it is not explored and used effectively.The traditional product quality prediction models have many disadvantages,such as high complexity and low accuracy.To overcome the above problems,we propose an optimized data equalization method to pre-process dataset and design a simple but effective product quality prediction model:radial basis function model optimized by the firefly algorithm with Levy flight mechanism(RBFFALM).First,the new data equalization method is introduced to pre-process the dataset,which reduces the dimension of the data,removes redundant features,and improves the data distribution.Then the RBFFALFM is used to predict product quality.Comprehensive expe riments conducted on real-world product quality datasets validate that the new model RBFFALFM combining with the new data pre-processing method outperforms other previous me thods on predicting product quality. 展开更多
关键词 product quality prediction data pre-processing radial basis function swarm intelligence optimization algorithm
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Fuzzy-second order sliding mode control optimized by genetic algorithm applied in direct torque control of dual star induction motor 被引量:3
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作者 Ghoulemallah BOUKHALFA Sebti BELKACEM +1 位作者 Abdesselem CHIKHI Moufid BOUHENTALA 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第12期3974-3985,共12页
The direct torque control of the dual star induction motor(DTC-DSIM) using conventional PI controllers is characterized by unsatisfactory performance, such as high ripples of torque and flux, and sensitivity to parame... The direct torque control of the dual star induction motor(DTC-DSIM) using conventional PI controllers is characterized by unsatisfactory performance, such as high ripples of torque and flux, and sensitivity to parametric variations. Among the most evoked control strategies adopted in this field to overcome these drawbacks presented in classical drive, it is worth mentioning the use of the second order sliding mode control(SOSMC) based on the super twisting algorithm(STA) combined with the fuzzy logic control(FSOSMC). In order to realize the optimal control performance, the FSOSMC parameters are adjusted using an optimization algorithm based on the genetic algorithm(GA). The performances of the envisaged control scheme, called G-FSOSMC, are investigated against G-SOSMC, G-PI and BBO-FSOSMC algorithms. The proposed controller scheme is efficient in reducing the torque and flux ripples, and successfully suppresses chattering. The effects of parametric uncertainties do not affect system performance. 展开更多
关键词 double star induction machine direct torque control fuzzy second order sliding mode control genetic algorithm biogeography based optimization algorithm
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基于改进蜣螂优化算法的K-means聚类
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作者 马志海 刘升 《运筹与管理》 北大核心 2025年第9期77-83,I0025-I0031,共14页
针对K-means聚类算法易受到初始聚类中心的影响且易陷入局部最优值的不足,提出一种基于改进蜣螂优化算法的K-means聚类算法。首先,引入分段线性混沌映射(Piecewise Linear Chaotic Map, PWLCM)改善种群多样性,提高算法的求解精度和收敛... 针对K-means聚类算法易受到初始聚类中心的影响且易陷入局部最优值的不足,提出一种基于改进蜣螂优化算法的K-means聚类算法。首先,引入分段线性混沌映射(Piecewise Linear Chaotic Map, PWLCM)改善种群多样性,提高算法的求解精度和收敛速度;其次,受鱼鹰算法位置识别和捕鱼策略的启发,使用其全局勘探策略替换蜣螂优化算法滚球阶段策略,可以弥补算法在滚球阶段中只依赖最差值,无法与其它蜣螂进行交流的缺点,从而增强算法的全局探索能力;然后,加入动态选择的自适应t分布扰动,增加全局开发以及局部搜索能力,通过CEC2017测试函数验证改进蜣螂优化算法的有效性和优越;最后,将改进后的蜣螂优化算法与K-means聚类算法相结合,从UCI数据集中选取6个真实的数据集与其他学者提出的群智能算法优化的K-means进行对比仿真实验,结果表明本文改进后的聚类算法具有更好的求解精度和鲁棒性。 展开更多
关键词 蜣螂优化算法 PWLCM映射 k-means聚类算法 自适应t分布
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基于K-Means、XGBoost和PSO的高炉布料矩阵优化研究
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作者 董壮壮 王月明 《现代电子技术》 北大核心 2025年第12期120-128,共9页
优化布料矩阵是实现高炉节能降碳的关键环节,然而现有研究对布料矩阵与燃料消耗参数的映射关系尚未充分揭示。为此,提出一种基于K-Means聚类、极端梯度提升(XGBoost)和粒子群优化(PSO)算法的高炉布料矩阵优化方法。首先,在高炉布料矩阵... 优化布料矩阵是实现高炉节能降碳的关键环节,然而现有研究对布料矩阵与燃料消耗参数的映射关系尚未充分揭示。为此,提出一种基于K-Means聚类、极端梯度提升(XGBoost)和粒子群优化(PSO)算法的高炉布料矩阵优化方法。首先,在高炉布料矩阵聚类方面对比分析K-Means和模糊C均值两个聚类算法,选择聚类效果较好的K-Means模型对高炉炉况进行聚类分析;然后,结合K-Means聚类结果和特征选取,提取布料矩阵关键特征参数,并建立XGBoost、径向基神经网络和随机森林模型来预测高炉燃料比,选择对燃料比预测最准确的XGBoost模型作为预测模型;最后,在XGBoost模型基础上,分别采用PSO和遗传算法进行燃料比最小值寻优并对比,选择优化效果较好的PSO进行结果分析。结果表明,所提方法能够在一定程度上改善高炉矿石熔化条件,降低燃料比,促进高炉节能降碳。 展开更多
关键词 高炉 布料矩阵 k-means XGBoost 粒子群算法 节能降碳
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A hybrid genetic algorithm to the program optimization model based on a heterogeneous network
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作者 CHEN Hang DOU Yajie +3 位作者 CHEN Ziyi JIA Qingyang ZHU Chen CHEN Haoxuan 《Journal of Systems Engineering and Electronics》 2025年第4期994-1005,共12页
Project construction and development are an impor-tant part of future army designs.In today’s world,intelligent war-fare and joint operations have become the dominant develop-ments in warfare,so the construction and ... Project construction and development are an impor-tant part of future army designs.In today’s world,intelligent war-fare and joint operations have become the dominant develop-ments in warfare,so the construction and development of the army need top-down,top-level design,and comprehensive plan-ning.The traditional project development model is no longer suf-ficient to meet the army’s complex capability requirements.Projects in various fields need to be developed and coordinated to form a joint force and improve the army’s combat effective-ness.At the same time,when a program consists of large-scale project data,the effectiveness of the traditional,precise mathe-matical planning method is greatly reduced because it is time-consuming,costly,and impractical.To solve above problems,this paper proposes a multi-stage program optimization model based on a heterogeneous network and hybrid genetic algo-rithm and verifies the effectiveness and feasibility of the model and algorithm through an example.The results show that the hybrid algorithm proposed in this paper is better than the exist-ing meta-heuristic algorithm. 展开更多
关键词 program optimization heterogeneous network genetic algorithm portfolio selection.
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Optimization model for performance-based warranty decision of degraded systems based on improved sparrow search algorithm
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作者 DONG Enzhi CHENG Zhonghua +3 位作者 LIU Zichang ZHU Xi WANG Rongcai BAI Yongsheng 《Journal of Systems Engineering and Electronics》 2025年第5期1259-1280,共22页
Performance-based warranties(PBWs)are widely used in industry and manufacturing.Given that PBW can impose financial burdens on manufacturers,rational maintenance decisions are essential for expanding profit margins.Th... Performance-based warranties(PBWs)are widely used in industry and manufacturing.Given that PBW can impose financial burdens on manufacturers,rational maintenance decisions are essential for expanding profit margins.This paper proposes an optimization model for PBW decisions for systems affected by Gamma degradation processes,incorporating periodic inspection.A system performance degradation model is established.Preventive maintenance probability and corrective renewal probability models are developed to calculate expected warranty costs and system availability.A benefits function,which includes incentives,is constructed to optimize the initial and subsequent inspection intervals and preventive maintenance thresholds,thereby maximizing warranty profit.An improved sparrow search algorithm is developed to optimize the model,with a case study on large steam turbine rotor shafts.The results suggest the optimal PBW strategy involves an initial inspection interval of approximately 20 months,with subsequent intervals of about four months,and a preventive maintenance threshold of approximately 37.39 mm wear.When compared to common cost-minimization-based condition maintenance strategies and PBW strategies that do not differentiate between initial and subsequent inspection intervals,the proposed PBW strategy increases the manufacturer’s profit by 1%and 18%,respectively.Sensitivity analyses provide managerial recommendations for PBW implementation.The PBW strategy proposed in this study significantly increases manufacturers’profits by optimizing inspection intervals and preventive maintenance thresholds,and manufacturers should focus on technological improvement in preventive maintenance and cost control to further enhance earnings. 展开更多
关键词 performance-based warranty gamma process periodic inspection intelligent optimization algorithm
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Topological optimization of metamaterial absorber based on improved estimation of distribution algorithm
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作者 TAO Shifei LIU Beichen +2 位作者 LIU Sixing WU Fan WANG Hao 《Journal of Systems Engineering and Electronics》 2025年第3期634-641,共8页
An improved estimation of distribution algorithm(IEDA)is proposed in this paper for efficient design of metamaterial absorbers.This algorithm establishes a probability model through the selected dominant groups and sa... An improved estimation of distribution algorithm(IEDA)is proposed in this paper for efficient design of metamaterial absorbers.This algorithm establishes a probability model through the selected dominant groups and samples from the model to obtain the next generation,avoiding the problem of building-blocks destruction caused by crossover and mutation.Neighboring search from artificial bee colony algorithm(ABCA)is introduced to enhance the local optimization ability and improved to raise the speed of convergence.The probability model is modified by boundary correction and loss correction to enhance the robustness of the algorithm.The proposed IEDA is compared with other intelligent algorithms in relevant references.The results show that the proposed IEDA has faster convergence speed and stronger optimization ability,proving the feasibility and effectiveness of the algorithm. 展开更多
关键词 METAMATERIAL topological optimization estimation of distribution algorithm
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Bayesian-based ant colony optimization algorithm for edge detection
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作者 YU Yongbin ZHONG Yuanjingyang +6 位作者 FENG Xiao WANG Xiangxiang FAVOUR Ekong ZHOU Chen CHENG Man WANG Hao WANG Jingya 《Journal of Systems Engineering and Electronics》 2025年第4期892-902,共11页
Ant colony optimization(ACO)is a random search algorithm based on probability calculation.However,the uninformed search strategy has a slow convergence speed.The Bayesian algorithm uses the historical information of t... Ant colony optimization(ACO)is a random search algorithm based on probability calculation.However,the uninformed search strategy has a slow convergence speed.The Bayesian algorithm uses the historical information of the searched point to determine the next search point during the search process,reducing the uncertainty in the random search process.Due to the ability of the Bayesian algorithm to reduce uncertainty,a Bayesian ACO algorithm is proposed in this paper to increase the convergence speed of the conventional ACO algorithm for image edge detection.In addition,this paper has the following two innovations on the basis of the classical algorithm,one of which is to add random perturbations after completing the pheromone update.The second is the use of adaptive pheromone heuristics.Experimental results illustrate that the proposed Bayesian ACO algorithm has faster convergence and higher precision and recall than the traditional ant colony algorithm,due to the improvement of the pheromone utilization rate.Moreover,Bayesian ACO algorithm outperforms the other comparative methods in edge detection task. 展开更多
关键词 ant colony optimization(ACO) Bayesian algorithm edge detection transfer function.
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种群优化联合鲁棒距离度量的公平性K-means算法
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作者 谢一涵 毕鹏飞 王爱萍 《电子测量与仪器学报》 北大核心 2025年第6期121-133,共13页
随着聚类算法在智能测量系统、多源传感数据分析与嵌入式状态识别等场景中的广泛应用,如何在保证聚类质量的同时兼顾敏感属性的公平性,已成为制约聚类算法在关键测量任务中应用效果的瓶颈问题。为解决上述问题,提出了一种创新的种群优... 随着聚类算法在智能测量系统、多源传感数据分析与嵌入式状态识别等场景中的广泛应用,如何在保证聚类质量的同时兼顾敏感属性的公平性,已成为制约聚类算法在关键测量任务中应用效果的瓶颈问题。为解决上述问题,提出了一种创新的种群优化联合鲁棒距离度量的公平性K-means聚类算法(PODM-Kmeans)。该方法在构建过程中,充分考虑到敏感属性的公平性与聚类质量之间的平衡性,引入改进的布谷鸟搜索算法以实现初始聚类中心选择过程中的全局搜索能力和局部搜索能力的平衡,有效增强了聚类效果的稳定性。在此基础上,在聚类迭代目标函数的构建上,该方法有效采用了公平性约束和簇大小约束机制,并融合了灵活的加权欧氏范数作为距离度量方法,合理抑制了异常值所带来的消极影响,助力了公平性的提升。通过在5个合成数据集和5个真实数据集上进行的大量实验结果表明,PODM-Kmeans在同类方法中具有较优的性能表现,尤其在Adult、Bank、Census1990和CreditCard 4个数据集上,在维持一定的聚类效果的同时,PODM-Kmeans的公平性比率(FR)指标均超过0.95。 展开更多
关键词 k-means聚类 公平性 种群优化 鲁棒距离度量 布谷鸟搜索算法 欧式距离
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基于最优划分的K-Means初始聚类中心选取算法 被引量:62
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作者 张健沛 杨悦 +1 位作者 杨静 张泽宝 《系统仿真学报》 CAS CSCD 北大核心 2009年第9期2586-2590,共5页
针对传统K-Means算法聚类过程中,聚类数目k值难以准确预设和随机选取初始聚类中心造成聚类精度及效率降低等问题,提出一种基于最优划分的K-Means初始聚类中心选取算法,该算法利用直方图方法将数据样本空间进行最优划分,依据数据样本自... 针对传统K-Means算法聚类过程中,聚类数目k值难以准确预设和随机选取初始聚类中心造成聚类精度及效率降低等问题,提出一种基于最优划分的K-Means初始聚类中心选取算法,该算法利用直方图方法将数据样本空间进行最优划分,依据数据样本自身分布特点确定K-Means算法的初始聚类中心,无需预设k值,减少了算法结果对参数的依赖,提高算法运算效率及准确率。实验结果表明,利用该算法改进的K-Means算法,运算时间明显减少,其聚类结果准确率以及算法效率均得到显著提高。 展开更多
关键词 K—Means算法 初始聚类中心 直方图 最优划分方法
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基于CUDA的并行K-means聚类图像分割算法优化 被引量:31
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作者 霍迎秋 秦仁波 +2 位作者 邢彩燕 陈曦 方勇 《农业机械学报》 EI CAS CSCD 北大核心 2014年第11期47-53,74,共8页
为提高K-means聚类算法的运算速度,基于CUDA架构提出一种分块、并行的K-means算法,并采用'合并访问'、'多级规约求和'、'负载均衡'和'指令优化'等策略优化并行算法。实验结果表明,并行K-means算法的分... 为提高K-means聚类算法的运算速度,基于CUDA架构提出一种分块、并行的K-means算法,并采用'合并访问'、'多级规约求和'、'负载均衡'和'指令优化'等策略优化并行算法。实验结果表明,并行K-means算法的分割效果与串行K-means算法相同,但运行速度得到了极大的提高,加速比最高达到560,很好地解决了农业工程实际中由于分割算法带来的瓶颈问题,能够极大地提高农业劳动生产率。 展开更多
关键词 图像分割 聚类分割算法 统一计算架构 图形处理器并行优化
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基于改进K-Means聚类和BP神经网络的台区线损率计算方法 被引量:182
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作者 李亚 刘丽平 +3 位作者 李柏青 易俊 王泽忠 田世明 《中国电机工程学报》 EI CSCD 北大核心 2016年第17期4543-4551,共9页
配电网线损管理中面临的主要问题有表计配置不齐备、运行数据不易收集、元件和节点数过多。这些问题导致线损率计算工作十分繁杂。提出了一种基于改进K-Means聚类算法和Levenberg-Marquardt(LM)算法优化的BP神经网络模型快速计算低压台... 配电网线损管理中面临的主要问题有表计配置不齐备、运行数据不易收集、元件和节点数过多。这些问题导致线损率计算工作十分繁杂。提出了一种基于改进K-Means聚类算法和Levenberg-Marquardt(LM)算法优化的BP神经网络模型快速计算低压台区线损率的方法,并通过编程加以实现。根据样本的电气特征参数,提出了改进K-Means聚类算法,将台区样本分类,解决了台区线损率数值分散的问题。在此基础上,采用LM算法优化的BP神经网络模型对样本数据按类进行训练,利用BP神经网络拟合样本线损率与电气特征参数之间的关系,得到其变化规律。以某地区601个台区样本数据为例进行仿真计算,验证了所提方法的准确性。结果表明,与标准BP神经网络模型相比,LM算法优化的BP神经网络模型具有快速收敛、高精度等优点。 展开更多
关键词 低压台区 电气特征参数 线损率 改进k-means聚类算法 LM算法优化的BP神经网络
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基于混合遗传算法的K-Means最优聚类算法 被引量:8
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作者 吕强 俞金寿 《华东理工大学学报(自然科学版)》 EI CAS CSCD 北大核心 2005年第2期219-222,共4页
针对遗传算法的K-Means聚类算法在遗传过程中容易受到适应度最大染色体的影响,存在过早收敛于局部最优值和遗传算法的局部搜索性能较差的问题,提出了结合混沌优化方法形成的混合遗传算法。仿真实验表明:该方法有效地克服了遗传算法的早... 针对遗传算法的K-Means聚类算法在遗传过程中容易受到适应度最大染色体的影响,存在过早收敛于局部最优值和遗传算法的局部搜索性能较差的问题,提出了结合混沌优化方法形成的混合遗传算法。仿真实验表明:该方法有效地克服了遗传算法的早熟问题,从而得到最优的聚类中心。 展开更多
关键词 数据挖掘 遗传算法 混沌优化 聚类
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