Metaheuristic optimization algorithms have gained wide adoption in engineering and scientific domains.However,many swarm-based methods struggle to balance exploration and exploitation,often converging prematurely on s...Metaheuristic optimization algorithms have gained wide adoption in engineering and scientific domains.However,many swarm-based methods struggle to balance exploration and exploitation,often converging prematurely on suboptimal solutions.The Sand Cat Swarm Optimization(SCSO)algorithm is one such method,with limited exploration ability constraining its performance on complex problem landscapes.This paper introduced the Enhanced Sand Cat with Selective Opposition(ESCSO)algorithm which combines opposition-based learning with a velocity mechanism to overcome this limitation.In ESCSO,under-performing candidates referred to as Sigma-variant cats are identified using Spearman correlation and replaced with their opposite solutions to inject diversity into the search process.Stronger candidates termed Sigma cats,act as elite guides pulling the search toward better regions.A PSO-inspired velocity update governs both roles,keeping exploration and exploitation in balance rather than letting one dominate.Tested across 30 benchmark functions plus two real engineering problems,reflectarray antenna design and microgrid energy management,ESCSO achieves competitive convergence,solution quality,and robustness when compared to recent state-of-the-art methods.展开更多
Considering the problem that a rooster in chicken swarm optimization(CSO)easily falls into a local optimum and cannot fully demonstrate the population wisdom,the paper proposed an improved CSO algorithm,which based on...Considering the problem that a rooster in chicken swarm optimization(CSO)easily falls into a local optimum and cannot fully demonstrate the population wisdom,the paper proposed an improved CSO algorithm,which based on behavior feedback from hens to rooster and rooster behavior logic reversal,therefore it is named behavior feedback and logic reversal CSO(BFLRCSO).The proposed algorithm changes the original rooster behavior logic to boost the convergence rate,which can accelerate the rooster optimization process,and the algorithm also introduces a feedback mechanism from hens to rooster which can prevent swarm dropping into a local optimum.The experiment results demonstrated that the BFLRCSO algorithm is not easy to fall into a local optimum,which has a better optimization result and shorter optimization time compared with the original CSO algorithm in both high and low dimensional search space.展开更多
About 170 nations have been affected by the COvid VIrus Disease-19(COVID-19)epidemic.On governing bodies across the globe,a lot of stress is created by COVID-19 as there is a continuous rise in patient count testing p...About 170 nations have been affected by the COvid VIrus Disease-19(COVID-19)epidemic.On governing bodies across the globe,a lot of stress is created by COVID-19 as there is a continuous rise in patient count testing positive,and they feel challenging to tackle this situation.Most researchers concentrate on COVID-19 data analysis using the machine learning paradigm in these situations.In the previous works,Long Short-Term Memory(LSTM)was used to predict future COVID-19 cases.According to LSTM network data,the outbreak is expected tofinish by June 2020.However,there is a chance of an over-fitting problem in LSTM and true positive;it may not produce the required results.The COVID-19 dataset has lower accuracy and a higher error rate in the existing system.The proposed method has been introduced to overcome the above-mentioned issues.For COVID-19 prediction,a Linear Decreasing Inertia Weight-based Cat Swarm Optimization with Half Binomial Distribution based Convolutional Neural Network(LDIWCSO-HBDCNN)approach is presented.In this suggested research study,the COVID-19 predicting dataset is employed as an input,and the min-max normalization approach is employed to normalize it.Optimum features are selected using Linear Decreasing Inertia Weight-based Cat Swarm Optimization(LDIWCSO)algorithm,enhancing the accuracy of classification.The Cat Swarm Optimization(CSO)algorithm’s convergence is enhanced using inertia weight in the LDIWCSO algorithm.It is used to select the essential features using the bestfitness function values.For a specified time across India,death and confirmed cases are predicted using the Half Binomial Distribution based Convolutional Neural Network(HBDCNN)technique based on selected features.As demonstrated by empirical observations,the proposed system produces significant performance in terms of f-measure,recall,precision,and accuracy.展开更多
本文提出改进沙丘猫算法(ISCSO)优化支持向量机(SVM)的惩罚因子和核函数参数,并用于光伏故障监测。采用Logistic映射初始化初始种群,并结合莱维(Levy)飞行策略和非线性参数策略对算法进行改进。将ISCSO与沙丘猫算法(SCSO)、灰狼算法(GWO...本文提出改进沙丘猫算法(ISCSO)优化支持向量机(SVM)的惩罚因子和核函数参数,并用于光伏故障监测。采用Logistic映射初始化初始种群,并结合莱维(Levy)飞行策略和非线性参数策略对算法进行改进。将ISCSO与沙丘猫算法(SCSO)、灰狼算法(GWO)、改进的灰狼算法(IGWO)进行对比,结果显示,相较于SCSO-SVM、IGWO-SVM、GWO-SVM以及SVM,ISCSO-SVM的平均识别精度分别提高了0.74%、0.54%、3.52%和14.28%。在收敛速度上,ISCSO对Schwefel’s Problem 1.2函数、Griewank函数分别在第3、5次迭代时收敛,收敛速度显著优于SCSO、IGWO、GWO。同时,ISCSO在泛化性验证中表现出最高准确率(99.45%),相较于SVM、GWO-SVM、SCSO-SVM与IGWO-SVM,平均准确率分别提高了2.28%、0.96%、0.64%和0.5%。本研究验证了ISCSO算法在有效性、稳定性和可行性方面的优势,为ISCSO算法优化支持向量机用于光伏故障监测提供了理论支撑。展开更多
摘要Metaheuristic optimization algorithms have gained wide adoption in engineering and scientific domains.However,many swarm-based methods struggle to balance exploration and exploitation,often converging prematurely on suboptimal solutions.The Sand Cat Swarm Optimization(SCSO)algorithm is one such method,with limited exploration ability constraining its performance on complex problem landscapes.This paper introduced the Enhanced Sand Cat with Selective Opposition(ESCSO)algorithm which combines opposition-based learning with a velocity mechanism to overcome this limitation.In ESCSO,under-performing candidates referred to as Sigma-variant cats are identified using Spearman correlation and replaced with their opposite solutions to inject diversity into the search process.Stronger candidates termed Sigma cats,act as elite guides pulling the search toward better regions.A PSO-inspired velocity update governs both roles,keeping exploration and exploitation in balance rather than letting one dominate.Tested across 30 benchmark functions plus two real engineering problems,reflectarray antenna design and microgrid energy management,ESCSO achieves competitive convergence,solution quality,and robustness when compared to recent state-of-the-art methods.
基金Supported by the National Natural Science Foundation of China(61302157)the National High Technology Research and Development Program of China(863Program)(2012AA12A308)the Yue Qi Young Scholars Project of China University of Mining&Technology(Beijing)(800015Z1117)
摘要Considering the problem that a rooster in chicken swarm optimization(CSO)easily falls into a local optimum and cannot fully demonstrate the population wisdom,the paper proposed an improved CSO algorithm,which based on behavior feedback from hens to rooster and rooster behavior logic reversal,therefore it is named behavior feedback and logic reversal CSO(BFLRCSO).The proposed algorithm changes the original rooster behavior logic to boost the convergence rate,which can accelerate the rooster optimization process,and the algorithm also introduces a feedback mechanism from hens to rooster which can prevent swarm dropping into a local optimum.The experiment results demonstrated that the BFLRCSO algorithm is not easy to fall into a local optimum,which has a better optimization result and shorter optimization time compared with the original CSO algorithm in both high and low dimensional search space.
摘要About 170 nations have been affected by the COvid VIrus Disease-19(COVID-19)epidemic.On governing bodies across the globe,a lot of stress is created by COVID-19 as there is a continuous rise in patient count testing positive,and they feel challenging to tackle this situation.Most researchers concentrate on COVID-19 data analysis using the machine learning paradigm in these situations.In the previous works,Long Short-Term Memory(LSTM)was used to predict future COVID-19 cases.According to LSTM network data,the outbreak is expected tofinish by June 2020.However,there is a chance of an over-fitting problem in LSTM and true positive;it may not produce the required results.The COVID-19 dataset has lower accuracy and a higher error rate in the existing system.The proposed method has been introduced to overcome the above-mentioned issues.For COVID-19 prediction,a Linear Decreasing Inertia Weight-based Cat Swarm Optimization with Half Binomial Distribution based Convolutional Neural Network(LDIWCSO-HBDCNN)approach is presented.In this suggested research study,the COVID-19 predicting dataset is employed as an input,and the min-max normalization approach is employed to normalize it.Optimum features are selected using Linear Decreasing Inertia Weight-based Cat Swarm Optimization(LDIWCSO)algorithm,enhancing the accuracy of classification.The Cat Swarm Optimization(CSO)algorithm’s convergence is enhanced using inertia weight in the LDIWCSO algorithm.It is used to select the essential features using the bestfitness function values.For a specified time across India,death and confirmed cases are predicted using the Half Binomial Distribution based Convolutional Neural Network(HBDCNN)technique based on selected features.As demonstrated by empirical observations,the proposed system produces significant performance in terms of f-measure,recall,precision,and accuracy.
摘要本文提出改进沙丘猫算法(ISCSO)优化支持向量机(SVM)的惩罚因子和核函数参数,并用于光伏故障监测。采用Logistic映射初始化初始种群,并结合莱维(Levy)飞行策略和非线性参数策略对算法进行改进。将ISCSO与沙丘猫算法(SCSO)、灰狼算法(GWO)、改进的灰狼算法(IGWO)进行对比,结果显示,相较于SCSO-SVM、IGWO-SVM、GWO-SVM以及SVM,ISCSO-SVM的平均识别精度分别提高了0.74%、0.54%、3.52%和14.28%。在收敛速度上,ISCSO对Schwefel’s Problem 1.2函数、Griewank函数分别在第3、5次迭代时收敛,收敛速度显著优于SCSO、IGWO、GWO。同时,ISCSO在泛化性验证中表现出最高准确率(99.45%),相较于SVM、GWO-SVM、SCSO-SVM与IGWO-SVM,平均准确率分别提高了2.28%、0.96%、0.64%和0.5%。本研究验证了ISCSO算法在有效性、稳定性和可行性方面的优势,为ISCSO算法优化支持向量机用于光伏故障监测提供了理论支撑。