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基于PSO-GA的铁路工程施工进度计划多目标优化研究
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作者 张飞涟 何姚阳 +5 位作者 韦有波 张彦春 赵新琛 吴喆 潘浩 蒙滇 《铁道科学与工程学报》 北大核心 2026年第1期327-339,共13页
针对铁路工程现有施工进度计划优化方法存在的局限性,对铁路工程施工进度计划多目标优化问题进行研究,提出铁路工程施工进度计划多目标优化方法。考虑资金的时间价值,以铁路工程施工总成本为核心优化目标,将工期和资源均衡作为次要目标... 针对铁路工程现有施工进度计划优化方法存在的局限性,对铁路工程施工进度计划多目标优化问题进行研究,提出铁路工程施工进度计划多目标优化方法。考虑资金的时间价值,以铁路工程施工总成本为核心优化目标,将工期和资源均衡作为次要目标转化为约束条件,构建铁路工程施工进度计划多目标优化模型。模型以各项施工活动的主要设备−劳动力作业组数量和开工时间为决策变量,综合考虑逻辑关系、工作面作业组最大配置数量等5类约束。由于铁路工程施工进度计划多目标优化模型属于连续、非线性问题,且变量和约束条件较为复杂,引入将粒子群算法与遗传算法相结合的粒子群−遗传算法(PSO-GA),在粒子群算法的基础上结合遗传算法的选择、交叉、变异操作进行改进,以便充分发挥粒子群算法的快速收敛与遗传算法的全局搜索优点,实现对铁路工程施工进度计划多目标优化问题的高效率、高精度求解。基于构建的铁路工程施工进度计划多目标优化模型,运用PSO-GA算法对某铁路工程L桥梁项目施工进度计划进行优化,结果表明优化后方案的施工总成本降低了51.44万元,工期缩短了120 d,主要设备及劳动力投入数量的相对波动性分别降低了14.66%和16.78%,验证了该优化模型和优化算法的适用性和有效性。研究成果可为建设周期长、投资规模大的铁路工程施工进度计划多目标优化提供一定的借鉴和参考。 展开更多
关键词 铁路工程 施工进度计划 多目标优化 粒子群算法 遗传算法
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基于Kriging模型与NSGA-Ⅱ算法的500 kV复合横担均压屏蔽装置设计优化
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作者 杨暘 刘鹏 黄力 《高压电器》 北大核心 2026年第2期183-193,共11页
超高压输电线路复合横担的绝缘结构复杂,部分重要区域电场畸变严重,极易发生电晕放电和电蚀损破坏,合理且有效的配置均压屏蔽装置是保障复合横担杆塔安全稳定运行的重要环节。为确定均压屏蔽装置的外形结构和具体参数尺寸,文中建立复合... 超高压输电线路复合横担的绝缘结构复杂,部分重要区域电场畸变严重,极易发生电晕放电和电蚀损破坏,合理且有效的配置均压屏蔽装置是保障复合横担杆塔安全稳定运行的重要环节。为确定均压屏蔽装置的外形结构和具体参数尺寸,文中建立复合横担三维模型,首先利用有限元仿真软件获得复合横担无均压屏蔽装置下的电场分布情况,分析场强畸变严重部位电场分布特性并对均压屏蔽装置进行初步设计;然后,采用最优拉丁超立方设计方法在均压屏蔽装置结构参数变量空间中抽取试验样本点,通过有限元仿真获得不同样本点下的复合横担和均压屏蔽装置表面电场分布;其次,通过构建Kriging模型,搭建复合横担和均压屏蔽装置测点场强与均压屏蔽装置结构参数的响应关系近似模型,并基于灵敏度分析技术获得各结构参数对复合横担和均压屏蔽装置表面最高场强的影响程度;最后,通过第二代非劣排序遗传算法,获得最优均压屏蔽装置结构参数。结果表明,加装文中设计优化后的均压屏蔽装置,复合横担柱式绝缘子沿面场强峰值下降约63.5%,悬式绝缘子沿面场强峰值下降约54.7%,并且复合横担沿面场强和均压屏蔽装置表面场强均满足控制要求。优化方法为输电线路均压屏蔽装置优化设计提供重要的参考价值。 展开更多
关键词 复合横担 均压屏蔽装置 多目标遗传算法 KRIGING模型
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基于GA-BP神经网络的碳纤维复合芯导线压接缺陷识别方法
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作者 杜志叶 黄子韧 +2 位作者 俸波 岳国华 廖永力 《电工技术学报》 北大核心 2026年第1期315-328,共14页
碳纤维复合芯导线因其低碳节能等特性,在输电线路的增容改造中有着良好的应用前景。但碳纤维芯棒十分脆弱,技术工艺不成熟,由于压接不良导致的断线事故时有发生,制约了该技术的推广应用。为此,该文针对断裂和少压两种严重压接缺陷,提出... 碳纤维复合芯导线因其低碳节能等特性,在输电线路的增容改造中有着良好的应用前景。但碳纤维芯棒十分脆弱,技术工艺不成熟,由于压接不良导致的断线事故时有发生,制约了该技术的推广应用。为此,该文针对断裂和少压两种严重压接缺陷,提出一种碳纤维复合芯导线压接缺陷的漏磁检测信号缺陷特征提取方法。通过实验优化,以漏磁检测信号数据中7个峰值点的幅值、21个相对位置信息和7个波形类型信息作为缺陷判断特征值,有效地提高了缺陷种类和缺陷程度识别的准确度。对碳纤维芯导线进行磁性制备,并研制相对应的漏磁检测装置,生产106根不同类型、不同程度的碳纤维芯压接缺陷样品,得到613组漏磁检测信号数据并完成特征值提取,搭建基于遗传算法(GA)的反向传播(BP)神经网络。实测数据表明,该方法可以有效地完成对碳纤维复合芯导线压接缺陷类型的识别,同时对缺陷程度的识别准确率可达到94.31%。 展开更多
关键词 碳纤维复合芯导线 缺陷识别 磁性制备 漏磁检测 遗传算法 BP神经网络
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基于ARGA-3D CNN的铅冷快堆三维中子通量预测方法研究
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作者 杨子辉 莫紫雯 +4 位作者 李中阳 孙国民 李兆东 戈道川 郁杰 《核技术》 北大核心 2026年第2期109-119,共11页
中子通量的三维预测对反应堆堆芯的设计、优化和安全分析至关重要,但由于微小型铅冷快堆空间紧凑且探测器布置困难,现有方法多集中在二维层面,较少关注三维通量的预测。本文提出了一种融合残差网络(Residual Network,ResNet)与多头自注... 中子通量的三维预测对反应堆堆芯的设计、优化和安全分析至关重要,但由于微小型铅冷快堆空间紧凑且探测器布置困难,现有方法多集中在二维层面,较少关注三维通量的预测。本文提出了一种融合残差网络(Residual Network,ResNet)与多头自注意力机制(Multi-head Self Attention,MSA)的三维卷积神经网络(Genetic Algorithm-Enhanced 3D Convolutional Neural Network with Multi-Head Self-Attention and Residual Connections,ARGA-3D CNN)模型,该模型可以有效捕捉堆芯中子通量的空间分布特征,解决空间依赖性问题。通过ResNet缓解梯度消失与爆炸,增强训练稳定性,同时借助MSA强化关键区域识别。此外,采用遗传算法优化超参数,进一步提升堆芯中子通量预测精度。实验基于蒙特卡罗粒子输运模拟软件SuperMC计算结果构建数据集,并用该数据集训练与优化ARGA-3D CNN模型进行预测。结果显示,该模型预测值与SuperMC计算结果对比,在平均绝对误差(Mean Absolute Error,MAE)、均方误差(Mean Squared Error,MSE)和决定系数(R2)指标上分别达到了3.19×10^(-6)、2.14×10^(-11)和0.973 5,计算效率有显著提升,单次预测仅耗时秒级,相比卷积神经网络(Convolutional Neural Network,CNN)、人工神经网络(Artificial Neural Network,ANN)、长短时记忆网络(Long Short-Term Memory,LSTM)以及Transformer等模型,预测效果更优。表明ARGA-3D CNN模型在三维中子通量预测中具有较高的精度和计算效率,为核反应堆堆芯参数的快速预测提供了新方法,具有一定的实用价值及意义。 展开更多
关键词 铅冷快堆 中子通量 三维卷积神经网络 多头自注意力机制 残差网络 遗传算法
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GENETIC ALGORITHMS AND GAME THEORY FOR HIGH LIFT DESIGN PROBLEMS IN AERODYNAMICS 被引量:7
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作者 PériauxJacques WangJiangfeng WuYizhao 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2002年第1期7-13,共7页
A multi-objective evolutionary optimization method (combining genetic algorithms(GAs)and game theory(GT))is presented for high lift multi-airfoil systems in aerospace engineering.Due to large dimension global op-timiz... A multi-objective evolutionary optimization method (combining genetic algorithms(GAs)and game theory(GT))is presented for high lift multi-airfoil systems in aerospace engineering.Due to large dimension global op-timization problems and the increasing importance of low cost distributed parallel environments,it is a natural idea to replace a globar optimization by decentralized local sub-optimizations using GT which introduces the notion of games associated to an optimization problem.The GT/GAs combined optimization method is used for recon-struction and optimization problems by high lift multi-air-foil desing.Numerical results are favorably compared with single global GAs.The method shows teh promising robustness and efficient parallel properties of coupled GAs with different game scenarios for future advanced multi-disciplinary aerospace techmologies. 展开更多
关键词 gaME theory genetic algorithms multi-ob-jective aerodynamic optimization 基因算法 博奕论 气动优化 翼型
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Automatic Identification of Tomato Maturation Using Multilayer Feed Forward Neural Network with Genetic Algorithms (GA) 被引量:1
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作者 FANG Jun-long ZHANG Chang-li WANG Shu-wen 《Journal of Northeast Agricultural University(English Edition)》 CAS 2004年第2期179-183,共5页
We set up computer vision system for tomato images. By using this system, the RGB value of tomato image was converted into HIS value whose H was used to acquire the color character of the surface of tomato. To use mul... We set up computer vision system for tomato images. By using this system, the RGB value of tomato image was converted into HIS value whose H was used to acquire the color character of the surface of tomato. To use multilayer feed forward neural network with GA can finish automatic identification of tomato maturation. The results of experiment showed that the accuracy was up to 94%. 展开更多
关键词 tomato maturation computer vision artificial neural network genetic algorithms
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Surrogate model-assisted interactive genetic algorithms with individual’s fuzzy and stochastic fitness 被引量:1
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作者 Xiaoyan SUN Dunwei GONG 《控制理论与应用(英文版)》 EI 2010年第2期189-199,共11页
We propose a surrogate model-assisted algorithm by using a directed fuzzy graph to extract a user’s cognition on evaluated individuals in order to alleviate user fatigue in interactive genetic algorithms with an indi... We propose a surrogate model-assisted algorithm by using a directed fuzzy graph to extract a user’s cognition on evaluated individuals in order to alleviate user fatigue in interactive genetic algorithms with an individual’s fuzzy and stochastic fitness.We firstly present an approach to construct a directed fuzzy graph of an evolutionary population according to individuals’dominance relations,cut-set levels and interval dominance probabilities,and then calculate an individual’s crisp fitness based on the out-degree and in-degree of the fuzzy graph.The approach to obtain training data is achieved using the fuzzy entropy of the evolutionary system to guarantee the credibilities of the samples which are used to train the surrogate model.We adopt a support vector regression machine as the surrogate model and train it using the sampled individuals and their crisp fitness.Then the surrogate model is optimized using the traditional genetic algorithm for some generations,and some good individuals are submitted to the user for the subsequent evolutions so as to guide and accelerate the evolution.Finally,we quantitatively analyze the performance of the presented algorithm in alleviating user fatigue and increasing more opportunities to find the satisfactory individuals,and also apply our algorithm to a fashion evolutionary design system to demonstrate its efficiency. 展开更多
关键词 Interactive genetic algorithms User fatigue Surrogate model Directed fuzzy graph Fuzzy entropy
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基于NSGA-Ⅲ的小型模块化铅冷快堆智能优化研究
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作者 张涵 胡赟 +2 位作者 郭瑞阳 庄毅 乔鹏瑞 《原子能科学技术》 北大核心 2026年第2期257-267,共11页
反应堆设计中通常存在多个优化目标,影响因素众多且不同因素之间相互耦合,给方案优化造成较大困难,本文针对小型模块化铅冷快堆型号QJMF-S开展方案智能优化研究。选取BP神经网络算法加速临界参数求解,提出了预测临界堆芯参数的训练流程... 反应堆设计中通常存在多个优化目标,影响因素众多且不同因素之间相互耦合,给方案优化造成较大困难,本文针对小型模块化铅冷快堆型号QJMF-S开展方案智能优化研究。选取BP神经网络算法加速临界参数求解,提出了预测临界堆芯参数的训练流程,模型预测误差约0.5%,选取NSGA-Ⅲ算法进行反应堆方案的多目标自动寻优,开展了初始取值范围、种群规模等超参数的调优方法研究,给出了多样化的优化解集,能够同时满足全自然循环、可运输、低浓铀等要求,部分解相对于初始方案,在反应堆高度、直径、总功率3个目标上实现了全面提升。本文结果揭示了算法超越人工优化的全局搜索能力和收敛性,可为反应堆方案论证提供重要参考。 展开更多
关键词 神经网络 遗传算法 小型模块化反应堆 铅冷快堆
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基于GA-BP神经网络的鸡舍有害气体浓度预测研究
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作者 孙希宇 任守华 +2 位作者 彭彦斌 石嘉敏 张仕豪 《中国家禽》 北大核心 2026年第2期95-102,共8页
为更精准地调控鸡舍内有害气体浓度,保障鸡的健康生长,试验基于遗传算法对反向传播(BP)神经网络优化的鸡舍有害气体浓度预测方法,通过优化BP神经网络的权值和阈值,利用遗传算法的全局搜索能力,使得模型避免出现局部最优解的情况,有效提... 为更精准地调控鸡舍内有害气体浓度,保障鸡的健康生长,试验基于遗传算法对反向传播(BP)神经网络优化的鸡舍有害气体浓度预测方法,通过优化BP神经网络的权值和阈值,利用遗传算法的全局搜索能力,使得模型避免出现局部最优解的情况,有效提升预测结果的准确性。结果显示:GA-BP神经网络预测模型对有害气体浓度预测结果准确性更高,以均方根误差(RMSE)、决定系数(R^(2))作为评价指标,在二氧化碳、硫化氢、氨气浓度预测上RMSE值分别为42.43、0.03、0.48,R^(2)值分别为0.94、0.96、0.96,均优于BP神经网络预测模型。研究表明,GA-BP神经网络模型能够较准确预测鸡舍内有害气体浓度,可为鸡舍有害气体调控提供技术支持。 展开更多
关键词 鸡舍 遗传算法 BP神经网络 有害气体 预测模型
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基于GA-RF的螺杆转子砂带磨削表面粗糙度预测
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作者 李越 杨赫然 +2 位作者 孙兴伟 董祉序 刘寅 《制造技术与机床》 北大核心 2026年第1期201-207,共7页
为了系统分析砂带磨削工艺参数对螺杆转子表面质量的影响规律,从而为实际生产中的参数选择提供参考依据。为提高预测精度,文章构建基于遗传算法优化的随机森林预测模型,并设计了五因素五水平正交试验,试验装置为自主研发的多头螺杆磨削... 为了系统分析砂带磨削工艺参数对螺杆转子表面质量的影响规律,从而为实际生产中的参数选择提供参考依据。为提高预测精度,文章构建基于遗传算法优化的随机森林预测模型,并设计了五因素五水平正交试验,试验装置为自主研发的多头螺杆磨削装置,具体参数为工件轴向进给速度为100~300 mm/min、砂带线速度为4.4~13.3 m/s、砂带张紧压力为0.20~0.30 MPa、磨削压力为0.40~0.50 MPa、砂带粒度为60~180μm。试验结果表明,遗传-随机森林(genetic algorithm-random forest, GA-RF)模型的平均预测误差为9.06%,明显低于Lasso模型(25.96%)和SVR模型(30.68%);单因素分析显示,表面粗糙度随轴向进给速度增加而变大,随着砂带线速度升高而降低;当进给速度从100增至300 mm/min时,Ra值上升约27%;而线速度从4.4 m/s提高到13.3 m/s时,Ra值下降约35%。研究验证了遗传-随机森林(GA-RF)模型在砂带磨削质量预测中的有效性,同时揭示了关键工艺参数的影响规律。研究可为螺杆转子加工参数选择提供理论指导,对实际生产具有重要的参考价值。 展开更多
关键词 砂带磨削 接触轮式磨削 粗糙度预测 遗传算法 随机森林
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Comparative analysis of GA and PSO algorithms for optimal cost management in on-grid microgrid energy systems with PV-battery integration
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作者 Mouna EL-Qasery Ahmed Abbou +2 位作者 Mohamed Laamim Lahoucine Id-Khajine Abdelilah Rochd 《Global Energy Interconnection》 2025年第4期572-580,共9页
The advent of microgrids in modern energy systems heralds a promising era of resilience,sustainability,and efficiency.Within the realm of grid-tied microgrids,the selection of an optimal optimization algorithm is crit... The advent of microgrids in modern energy systems heralds a promising era of resilience,sustainability,and efficiency.Within the realm of grid-tied microgrids,the selection of an optimal optimization algorithm is critical for effective energy management,particularly in economic dispatching.This study compares the performance of Particle Swarm Optimization(PSO)and Genetic Algorithms(GA)in microgrid energy management systems,implemented using MATLAB tools.Through a comprehensive review of the literature and sim-ulations conducted in MATLAB,the study analyzes performance metrics,convergence speed,and the overall efficacy of GA and PSO,with a focus on economic dispatching tasks.Notably,a significant distinction emerges between the cost curves generated by the two algo-rithms for microgrid operation,with the PSO algorithm consistently resulting in lower costs due to its effective economic dispatching capabilities.Specifically,the utilization of the PSO approach could potentially lead to substantial savings on the power bill,amounting to approximately$15.30 in this evaluation.Thefindings provide insights into the strengths and limitations of each algorithm within the complex dynamics of grid-tied microgrids,thereby assisting stakeholders and researchers in arriving at informed decisions.This study contributes to the discourse on sustainable energy management by offering actionable guidance for the advancement of grid-tied micro-grid technologies through MATLAB-implemented optimization algorithms. 展开更多
关键词 MICROGRID EMS ga algorithm PSO algorithm Cost optimization Economic dispatch
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Fault Detection Using Negative Selection and Genetic Algorithms 被引量:3
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作者 Anam ABID Zia Ul HAQ Muhammad Tahir KHAN 《Instrumentation》 2019年第3期39-51,共13页
In this paper,negative selection and genetic algorithms are combined and an improved bi-objective optimization scheme is presented to achieve optimized negative selection algorithm detectors.The main aim of the optima... In this paper,negative selection and genetic algorithms are combined and an improved bi-objective optimization scheme is presented to achieve optimized negative selection algorithm detectors.The main aim of the optimal detector generation technique is maximal nonself space coverage with reduced number of diversified detectors.Conventionally,researchers opted clonal selection based optimization methods to achieve the maximal nonself coverage milestone;however,detectors cloning process results in generation of redundant similar detectors and inefficient detector distribution in nonself space.In approach proposed in the present paper,the maximal nonself space coverage is associated with bi-objective optimization criteria including minimization of the detector overlap and maximization of the diversity factor of the detectors.In the proposed methodology,a novel diversity factorbased approach is presented to obtain diversified detector distribution in the nonself space.The concept of diversified detector distribution is studied for detector coverage with 2-dimensional pentagram and spiral self-patterns.Furthermore,the feasibility of the developed fault detection methodology is tested the fault detection of induction motor inner race and outer race bearings. 展开更多
关键词 Detector Coverage Diversity Factor Fault Detection genetic Algorithm Negative Selection Algorithm
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基于GA-BP的弧形端坯料辊切成形工艺优化
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作者 代月晨 王英 +2 位作者 束学道 张歆研 许雅妮 《塑性工程学报》 北大核心 2026年第2期157-165,共9页
为了更快捷、准确地解决弧形端坯料辊切成形过程中的工艺参数优化问题,提出一种基于遗传算法(GA)与反向传播(BP)神经网络的工艺参数智能优化策略。建立了弧形端坯料辊切成形有限元模型,分析了弧形端成形过程,构建了综合弧形半径偏差和... 为了更快捷、准确地解决弧形端坯料辊切成形过程中的工艺参数优化问题,提出一种基于遗传算法(GA)与反向传播(BP)神经网络的工艺参数智能优化策略。建立了弧形端坯料辊切成形有限元模型,分析了弧形端成形过程,构建了综合弧形半径偏差和弧度角偏差的成形质量评价指标,通过正交试验结合极差法分析了挡板间隙、辊切速度和展宽角等关键工艺参数对成形质量的影响优先级。在此基础上,建立了GA-BP神经网络预测模型,实现工艺参数与成形质量偏差之间的非线性映射,并结合多目标优化算法得出一组最优工艺参数组合。试验验证表明:在优化后的工艺参数组合下弧形端坯料的成形质量较高,并且预测与试验结果的误差在2.11%以下,验证了该方法的工程实用价值与理论可靠性。 展开更多
关键词 辊切成形 工艺优化 神经网络 遗传算法 多目标优化
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Optimization of Operating Parameters for Underground Gas Storage Based on Genetic Algorithm
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作者 Yuming Luo Wei Zhang +7 位作者 Anqi Zhao Ling Gou Li Chen Yaling Yang Xiaoping Wang Shichang Liu Huiqing Qi Shilai Hu 《Energy Engineering》 2025年第8期3201-3221,共21页
This work proposes an optimization method for gas storage operation parameters under multi-factor coupled constraints to improve the peak-shaving capacity of gas storage reservoirs while ensuring operational safety.Pr... This work proposes an optimization method for gas storage operation parameters under multi-factor coupled constraints to improve the peak-shaving capacity of gas storage reservoirs while ensuring operational safety.Previous research primarily focused on integrating reservoir,wellbore,and surface facility constraints,often resulting in broad constraint ranges and slow model convergence.To solve this problem,the present study introduces additional constraints on maximum withdrawal rates by combining binomial deliverability equations with material balance equations for closed gas reservoirs,while considering extreme peak-shaving demands.This approach effectively narrows the constraint range.Subsequently,a collaborative optimization model with maximum gas production as the objective function is established,and the model employs a joint solution strategy combining genetic algorithms and numerical simulation techniques.Finally,this methodology was applied to optimize operational parameters for Gas Storage T.The results demonstrate:(1)The convergence of the model was achieved after 6 iterations,which significantly improved the convergence speed of the model;(2)The maximum working gas volume reached 11.605×10^(8) m^(3),which increased by 13.78%compared with the traditional optimization method;(3)This method greatly improves the operation safety and the ultimate peak load balancing capability.The research provides important technical support for the intelligent decision of injection and production parameters of gas storage and improving peak load balancing ability. 展开更多
关键词 Underground gas storage operational parameter optimization extreme peak-shaving constraints genetic algorithm MODEL
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Fuzzy Logic Based Evaluation of Hybrid Termination Criteria in the Genetic Algorithms for the Wind Farm Layout Design Problem
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作者 Salman A.Khan Mohamed Mohandes +2 位作者 Shafiqur Rehman Ali Al-Shaikhi Kashif Iqbal 《Computers, Materials & Continua》 2025年第7期553-581,共29页
Wind energy has emerged as a potential replacement for fossil fuel-based energy sources.To harness maximum wind energy,a crucial decision in the development of an efficient wind farm is the optimal layout design.This ... Wind energy has emerged as a potential replacement for fossil fuel-based energy sources.To harness maximum wind energy,a crucial decision in the development of an efficient wind farm is the optimal layout design.This layout defines the specific locations of the turbines within the wind farm.The process of finding the optimal locations of turbines,in the presence of various technical and technological constraints,makes the wind farm layout design problem a complex optimization problem.This problem has traditionally been solved with nature-inspired algorithms with promising results.The performance and convergence of nature-inspired algorithms depend on several parameters,among which the algorithm termination criterion plays a crucial role.Timely convergence is an important aspect of efficient algorithm design because an inefficient algorithm results in wasted computational resources,unwarranted electricity consumption,and hardware stress.This study provides an in-depth analysis of several termination criteria while using the genetic algorithm as a test bench,with its application to the wind farm layout design problem while considering various wind scenarios.The performance of six termination criteria is empirically evaluated with respect to the quality of solutions produced and the execution time involved.Due to the conflicting nature of these two attributes,fuzzy logic-based multi-attribute decision-making is employed in the decision process.Results for the fuzzy decision approach indicate that among the various criteria tested,the criterion Phi achieves an improvement in the range of 2.44%to 32.93%for wind scenario 1.For scenario 2,Best-worst termination criterion performed well compared to the other criteria evaluated,with an improvement in the range of 1.2%to 9.64%.For scenario 3,Hitting bound was the best performer with an improvement of 1.16%to 20.93%. 展开更多
关键词 Wind energy wind farm layout design performance evaluation genetic algorithms fuzzy logic multi-attribute decision-making
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An IntelligentMulti-Stage GA–SVM Hybrid Optimization Framework for Feature Engineering and Intrusion Detection in Internet of Things Networks
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作者 Isam Bahaa Aldallal Abdullahi Abdu Ibrahim Saadaldeen Rashid Ahmed 《Computers, Materials & Continua》 2026年第4期985-1007,共23页
The rapid growth of IoT networks necessitates efficient Intrusion Detection Systems(IDS)capable of addressing dynamic security threats under constrained resource environments.This paper proposes a hybrid IDS for IoT n... The rapid growth of IoT networks necessitates efficient Intrusion Detection Systems(IDS)capable of addressing dynamic security threats under constrained resource environments.This paper proposes a hybrid IDS for IoT networks,integrating Support Vector Machine(SVM)and Genetic Algorithm(GA)for feature selection and parameter optimization.The GA reduces the feature set from 41 to 7,achieving a 30%reduction in overhead while maintaining an attack detection rate of 98.79%.Evaluated on the NSL-KDD dataset,the system demonstrates an accuracy of 97.36%,a recall of 98.42%,and an F1-score of 96.67%,with a low false positive rate of 1.5%.Additionally,it effectively detects critical User-to-Root(U2R)attacks at a rate of 96.2%and Remote-to-Local(R2L)attacks at 95.8%.Performance tests validate the system’s scalability for networks with up to 2000 nodes,with detection latencies of 120 ms at 65%CPU utilization in small-scale deployments and 250 ms at 85%CPU utilization in large-scale scenarios.Parameter sensitivity analysis enhances model robustness,while false positive examination aids in reducing administrative overhead for practical deployment.This IDS offers an effective,scalable,and resource-efficient solution for real-world IoT system security,outperforming traditional approaches. 展开更多
关键词 CYBERSECURITY intrusion detection system(IDS) IoT support vector machines(SVM) genetic algorithms(ga) feature selection NSL-KDD dataset anomaly detection
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An Overall Optimization Model Using Metaheuristic Algorithms for the CNN-Based IoT Attack Detection Problem
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作者 Le Thi Hong Van Le Duc Thuan +1 位作者 Pham Van Huong Nguyen Hieu Minh 《Computers, Materials & Continua》 2026年第4期1934-1964,共31页
Optimizing convolutional neural networks(CNNs)for IoT attack detection remains a critical yet challenging task due to the need to balance multiple performance metrics beyond mere accuracy.This study proposes a unified... Optimizing convolutional neural networks(CNNs)for IoT attack detection remains a critical yet challenging task due to the need to balance multiple performance metrics beyond mere accuracy.This study proposes a unified and flexible optimization framework that leverages metaheuristic algorithms to automatically optimize CNN configurations for IoT attack detection.Unlike conventional single-objective approaches,the proposed method formulates a global multi-objective fitness function that integrates accuracy,precision,recall,and model size(speed/model complexity penalty)with adjustable weights.This design enables both single-objective and weightedsum multi-objective optimization,allowing adaptive selection of optimal CNN configurations for diverse deployment requirements.Two representativemetaheuristic algorithms,GeneticAlgorithm(GA)and Particle Swarm Optimization(PSO),are employed to optimize CNNhyperparameters and structure.At each generation/iteration,the best configuration is selected as themost balanced solution across optimization objectives,i.e.,the one achieving themaximum value of the global objective function.Experimental validation on two benchmark datasets,Edge-IIoT and CIC-IoT2023,demonstrates that the proposed GA-and PSO-based models significantly enhance detection accuracy(94.8%–98.3%)and generalization compared with manually tuned CNN configurations,while maintaining compact architectures.The results confirm that the multi-objective framework effectively balances predictive performance and computational efficiency.This work establishes a generalizable and adaptive optimization strategy for deep learning-based IoT attack detection and provides a foundation for future hybrid metaheuristic extensions in broader IoT security applications. 展开更多
关键词 genetic algorithm(ga) particle swarm optimization(PSO) multi-objective optimization convolutional neural network—CNN IoT attack detection metaheuristic optimization CNN configuration
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Hybrid genetic algorithm for parametric optimization of surface pipeline networks in underground natural gas storage harmonized injection and production conditions
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作者 Jun Zhou Zichen Li +4 位作者 Shitao Liu Chengyu Li Yunxiang Zhao Zonghang Zhou Guangchuan Liang 《Natural Gas Industry B》 2025年第2期234-250,共17页
The surface injection and production system(SIPS)is a critical component for effective injection and production processes in underground natural gas storage.As a vital channel,the rational design of the surface inject... The surface injection and production system(SIPS)is a critical component for effective injection and production processes in underground natural gas storage.As a vital channel,the rational design of the surface injection and production(SIP)pipeline significantly impacts efficiency.This paper focuses on the SIP pipeline and aims to minimize the investment costs of surface projects.An optimization model under harmonized injection and production conditions was constructed to transform the optimization problem of the SIP pipeline design parameters into a detailed analysis of the injection condition model and the production condition model.This paper proposes a hybrid genetic algorithm generalized reduced gradient(HGA-GRG)method,and compares it with the traditional genetic algorithm(GA)in a practical case study.The HGA-GRG demonstrated significant advantages in optimization outcomes,reducing the initial cost by 345.371×10^(4) CNY compared to the GA,validating the effectiveness of the model.By adjusting algorithm parameters,the optimal iterative results of the HGA-GRG were obtained,providing new research insights for the optimal design of a SIPS. 展开更多
关键词 Underground natural gas storage Surface injection and production pipeline Parameter optimization Hybrid genetic algorithm
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PID Steering Control Method of Agricultural Robot Based on Fusion of Particle Swarm Optimization and Genetic Algorithm
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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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融合光学和声学特征的岛礁周边海底底质GA-XGBoost分类方法
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作者 张玉洁 李杰 +3 位作者 李宁宁 刘晓瑜 唐秋华 张靖宇 《海洋科学进展》 北大核心 2026年第1期111-124,共14页
海底底质类型的精确识别对了解底栖海洋群落的分布和规划海洋资源可持续开发至关重要,机器学习算法是识别底质类型的有效手段。针对岛礁单一声学数据底质分类局限性,融合多光谱遥感数据为解决该局限性提供了新思路。本研究提出了一种融... 海底底质类型的精确识别对了解底栖海洋群落的分布和规划海洋资源可持续开发至关重要,机器学习算法是识别底质类型的有效手段。针对岛礁单一声学数据底质分类局限性,融合多光谱遥感数据为解决该局限性提供了新思路。本研究提出了一种融合多光谱遥感数据和多波束数据、基于特征选择和遗传算法——极限梯度提升算法(Genetic Algorithm-Extreme Gradient Boosting, GA-XGBoost)的多源数据海底底质分类方法。首先对WorldView-2多光谱数据和多波束数据进行预处理,统一地理坐标系统并进行空间分辨率配准;然后提取多光谱影像的光谱特征、测深数据的地形特征及反向散射强度纹理特征,组成18维特征参数,基于XGBoost(Extreme Gradient Boosting)算法结合向前逐步特征选择从18维特征中选出12维最优特征子集;之后构建GA-XGBoost分类模型,分别使用单一数据源及多源数据训练和测试模型,与BPNN(Back Propagation Neural Network)、 GA-BP(Genetic Algorithm-Back Propagation Neural Network)和XGBoost分类算法的精度对比分析;最后,应用最优的GA-XGBoost模型对整个研究区底质进行分类并可视化。实验结果显示,该方法在海底底质分类中的总体精度达91.23%,Kappa系数为0.87,F1分数为0.911 8,显著优于单一数据源输入及对比算法,表明GA-XGBoost模型为海底底质快速、准确分类的一种新的有效解决方案。 展开更多
关键词 海底底质分类 多源数据 遗传算法 XGBoost 机器学习
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