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基于增强模拟退火算法的动车所调车作业计划多目标优化方法

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铁道运输与经济 2024年第2期46卷 10-19页

作者：刘毅唐秋华何明武汉科技大学冶金装备及其控制教育部重点实验室湖北武汉430081 武汉科技大学机械传动与制造工程湖北省重点实验室湖北武汉430081

尽头式动车所调车作业存在多种可选作业模式,且在调车作业时需考虑作业总时间及转线复杂度等多性能指标,合理制定综合上述情况下的动车所调车作业计划,对提高动车所检修能力具有重要意义。为此,以最小调车作业时间及转线复杂度为目标,... 详细信息

尽头式动车所调车作业存在多种可选作业模式,且在调车作业时需考虑作业总时间及转线复杂度等多性能指标,合理制定综合上述情况下的动车所调车作业计划,对提高动车所检修能力具有重要意义。为此,以最小调车作业时间及转线复杂度为目标,构建带咽喉区股道约束的动车所调车作业混合整数线性规划模型,并提出一种增强多目标模拟退火算法(EMOSA)。该算法融合基于启发式规则的解码设计,以消除股道占用在时空上的冲突,面向调车作业进行股道合理分配;设计与问题规模相关的帕累托前沿解集重启机制,避免算法陷入局部最优。对不同规模的多个案例进行测试,验证了所提改进算子的有效性。最后,以某动车运用所的调车作业计划编制为例,验证了模型和算法的实用性和正确性。

关键词：尽头式动车所调车作业计划模拟退火算法多目标优化启发式规则

基于改进候鸟迁徙算法的人机协作装配线平衡优化

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计算机集成制造系统 2024年第9期30卷 3071-3083页

作者：郑晨昱李梓响唐秋华张子凯张利平武汉科技大学冶金装备及其控制教育部重点实验室武汉科技大学机械传动与制造工程湖北省重点实验室武汉科技大学精密制造研究院

随着员工成本的增加，协作机器人逐步应用于装配线以独立完成或者协助员工完成装配操作。针对多种机器人和并行协作的人机协作装配线平衡问题，构建了两个混合整数规划模型以优化生产节拍。模型均可实现小规模案例的精确求解，并且改进... 详细信息

随着员工成本的增加，协作机器人逐步应用于装配线以独立完成或者协助员工完成装配操作。针对多种机器人和并行协作的人机协作装配线平衡问题，构建了两个混合整数规划模型以优化生产节拍。模型均可实现小规模案例的精确求解，并且改进后的模型在求解时间上明显优于改进前的模型。同时，提出了改进的候鸟迁徙算法以实现大规模问题的求解。该算法采取任务分配向量和装配模式向量双层编码方式，并在解码中采取数学规划方法获得可行的调度方案。改进的候鸟迁徙算法采取改进的领鸟进化阶段和改进的个体进化阶段以加速种群的进化并防止陷入局部最优，采取重启机制增强算法的探索能力。为了测试改进算法的性能，该算法与延迟接受爬山算法、模拟退火算法、遗传算法、离散粒子群算法、原始人工蜂群算法和原始候鸟迁徙算法进行对比，测试结果表明改进算法优于对比算法，可实现人机协作装配线平衡问题的高效求解。

关键词：装配线平衡人机协作数学规划候鸟迁徙算法智能优化算法

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联合卫星测高和GNSS观测的天津沿海近25年相对海平面变化分析

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武汉大学学报（信息科学版） 2024年第5期49卷 775-784页

作者：周东旭冯义楷张化疑付延光唐秋华自然资源部第一海洋研究所山东青岛266061 自然资源部海洋测绘重点实验室山东青岛266590

针对现有验潮公开数据因时间范围及潮位沉降修正等影响,难以真实反映天津沿海相对海平面变化的问题,基于全球导航卫星系统(global navigation satellite system,GNSS)与验潮并置观测,设计了联合卫星测高和GNSS观测的天津沿海相对海平面... 详细信息

针对现有验潮公开数据因时间范围及潮位沉降修正等影响,难以真实反映天津沿海相对海平面变化的问题,基于全球导航卫星系统(global navigation satellite system,GNSS)与验潮并置观测,设计了联合卫星测高和GNSS观测的天津沿海相对海平面变化分析方法。分析结果显示,1993—2018年期间,塘沽验潮站点的相对海平面上升速率约为13.45±0.45 mm/a;联合4个虚拟并置观测站,得到天津沿海不同区域的相对海平面上升速率在11.15~19.17 mm/a,平均上升速率15.09±0.45 mm/a。沿海地面沉降是天津相对海平面上升速率偏高的主要因素(贡献率大于70%),受地面沉降非均匀空间分布的影响,海平面上升速率存在区域差异,塘沽验潮站难以代表整个天津沿海的相对海平面变化。

关键词：天津沿海相对海平面地面沉降并置观测 GNSS 卫星测高

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基于线性加权和法的装配线平衡问题求解

现代制造工程 2024年第3期 8-14,22页

作者：景湉佳贾世会迟晓妮唐秋华武汉科技大学理学院武汉430081 武汉科技大学冶金工业过程系统科学湖北省重点实验室武汉430081 桂林电子科技大学数学与计算机科学学院桂林541004 武汉科技大学机械自动化学院武汉430081

针对生产节拍确定条件下以提高装配线平衡程度为目的的装配线平衡问题,将装配线平滑系数和装配线平衡率作为优化目标,考虑装配作业分配、工作站数量等因素,使用线性加权和法,以两个优化目标的优先占比作为权重参数建立单目标装配线平衡... 详细信息

针对生产节拍确定条件下以提高装配线平衡程度为目的的装配线平衡问题,将装配线平滑系数和装配线平衡率作为优化目标,考虑装配作业分配、工作站数量等因素,使用线性加权和法,以两个优化目标的优先占比作为权重参数建立单目标装配线平衡优化模型;对遗传算法(Genetic Algorithm,GA)和蚁群(Ant Colony Optimization,ACO)算法的混合算法进行改进,构造新的适应度函数和距离信息矩阵对模型进行求解;最后对经典算例进行数值实验,实验结果与以往算法结果比较,平衡程度改进均值提高了5%,表明改进的模型及算法可以更好地提高装配线的平衡程度,验证了模型及算法的有效性。

关键词：装配线平衡问题遗传算法蚁群算法单目标优化

An efficient migrating birds optimization algorithm with idle time reduction for Type-I multi-manned assembly line balancing problem

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Journal of Systems Engineering and Electronics 2021年第2期32卷 286-296页

作者： ZHANG Zikai tang qiuhua LI Zixiang HAN Dayong Key Laboratory of Metallurgical Equipment and Control Technology Wuhan University of Science and TechnologyWuhan 430081China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan 430081China

Multi-manned assembly line,which is broadly utilized to assemble high volume products such as automobiles and trucks,allows a group of workers to assemble different tasks simultaneously in a multi-manned *** additional characteristic of parallel operators increases the complexity of the traditional NP-hard assembly line balancing ***,this paper formulates the Type-I multi-manned assembly line balancing problem to minimize the total number of workstations and operators,and develops an efficient migrating birds optimization algorithm embedded into an idle time reduction *** this algorithm,a new decoding mechanism is proposed which reduces the sequence-dependent idle time by some task assignment rules;three effective neighborhoods are developed to make refinement of existing solutions in the bird improvement phases;and temperature acceptance and competitive mechanism are employed to avoid being trapped in the local *** experiments suggest that the new decoding and improvements are effective and the proposed algorithm outperforms the compared algorithms.

关键词： multi-manned assembly line balancing migrating birds optimization meta-heuristics

Effective Hybrid Teaching-learning-based Optimization Algorithm for Balancing Two-sided Assembly Lines with Multiple Constraints

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Chinese Journal of Mechanical Engineering 2015年第5期28卷 1067-1079页

作者： tang qiuhua LI Zixiang ZHANG Liping FLOUDAS C A CAO Xiaojun Industrial Engineering Department Wuhan University of Science and Technology Texas A&M Energy Institute Texas A&M University College Station Technique Center of Dongfeng Peugeot Citroen Automobile Company

Due to the NP-hardness of the two-sided assembly line balancing （TALB） problem, multiple constraints existing in real applications are less studied, especially when one task is involved with several constraints. In this paper, an effective hybrid algorithm is proposed to address the TALB problem with multiple constraints （TALB-MC）. Considering the discrete attribute of TALB-MC and the continuous attribute of the standard teaching-learning-based optimization （TLBO） algorithm, the random-keys method is hired in task permutation representation, for the purpose of bridging the gap between them. Subsequently, a special mechanism for handling multiple constraints is developed. In the mechanism, the directions constraint of each task is ensured by the direction check and adjustment. The zoning constraints and the synchronism constraints are satisfied by teasing out the hidden correlations among constraints. The positional constraint is allowed to be violated to some extent in decoding and punished in cost fimction. Finally, with the TLBO seeking for the global optimum, the variable neighborhood search （VNS） is further hybridized to extend the local search space. The experimental results show that the proposed hybrid algorithm outperforms the late acceptance hill-climbing algorithm （LAHC） for TALB-MC in most cases, especially for large-size problems with multiple constraints, and demonstrates well balance between the exploration and the exploitation. This research proposes an effective and efficient algorithm for solving TALB-MC problem by hybridizing the TLBO and VNS.

关键词： two-sided assembly line balancing teaching-learning-based optimization algorithm variable neighborhood search positional constraints zoning constraints synchronism constraints

Rules Mining-Based Gene Expression Programming for the Multi-Skill Resource Constrained Project Scheduling Problem

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Computer Modeling in Engineering & Sciences 2023年第9期136卷 2815-2840页

作者： Min Hu Zhimin Chen Yuan Xia Liping Zhang qiuhua tang Key Laboratory of Metallurgical Equipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan430081China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan430081China Precision Manufacturing Institute Wuhan University of Science and TechnologyWuhan430081China China Ship Development and Design Center Wuhan430060China

Themulti-skill resource-constrained project scheduling problem(MS-RCPSP)is a significantmanagement science problem that extends from the resource-constrained project scheduling problem(RCPSP)and is integrated with a real project and production *** solve MS-RCPSP,it is an efficient method to use dispatching rules combined with a parallel scheduling mechanism to generate a scheduling *** paper proposes an improved gene expression programming(IGEP)approach to explore newly dispatching rules that can broadly solve MS-RCPSP.A new backward traversal decoding mechanism,and several neighborhood operators are applied in *** backward traversal decoding mechanism dramatically reduces the space complexity in the decoding process,and improves the algorithm’s *** neighborhood operators improve the exploration of the potential search *** experiment takes the intelligent multi-objective project scheduling environment(iMOPSE)benchmark dataset as the training set and testing set of *** newly dispatching rules are discovered and extracted by IGEP,and eight out of ten are superior to other typical dispatching rules.

关键词： Project scheduling multi-skill gene expression programming dispatching rules

Detailed seafloor geomorphology of the western region of the North Yellow Sea,China:The result of Holocene erosional and depositional processes sculpting the offshore continental shelf

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Acta Oceanologica Sinica 2022年第12期41卷 38-47页

作者： Xiaoyu Liu Yilan Chen Chenguang Liu qiuhua tang Yanhong Wang Shan Gao First Institute of Oceanography Ministry of Natural ResourcesQingdao 266100China Key Laboratory of Oceanic Surveying and Mapping Ministry of Natural ResourcesQingdao 266590China

High-resolution multi-beam/single-beam bathymetric data and seismic profiling data from the latest surveys are used to map and interpret the detailed seafloor geomorphology of the western region of the North Yellow Sea(NYS),*** mapping area covers 156410 km^(2),and incorporates a flat shelf plain,subaqueous accumulation shoals,tidal scouring troughs,and tidal sand ridge *** areas with water depths less than 50 m in the western region of the NYS are mainly covered by thick,loose sediments,forming wide spread accumulation geomorphological features;these include the Liaodong Peninsula subaqueous accumulation system containing shoals and rugged scouring troughs,and the large mud wedge of the Shandong *** the central part of the NYS,there is a relatively flat residual shelf plain with coarser sediment *** flat shelf plain has a water depth larger than 50 m and a thin layer of sediment,on which there is a large pockmark field caused by seafloor *** geomorphological structures indicate that modern sedimentary processes are the main driving force controlling the sculpture of the current seafloor surface *** strong tidal current systems and abundant sediment sources provide the critical external forces and essential conditions for the formation of seafloor *** tectonic basement controls the macroscopic morphological shape of the NYS,but is reflected very little in the seafloor geomorphic *** results provide a detailed seafloor geomorphological map of the western region of the NYS,an area that has not previously mapped and also provide a scientific framework for further research into offshore seafloor geomorphology,shelf sedimentary processes,and submarine engineering construction in this region.

关键词： seafloor geomorphology North Yellow Sea geomorphic map mud wedge accumulative shoal

Accuracy assessment of global ocean tide models in the South China Sea using satellite altimeter and tide gauge data

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Acta Oceanologica Sinica 2020年第12期39卷 1-10页

作者： Yanguang Fu Yikai Feng Dongxu Zhou Xinghua Zhou Jie Li qiuhua tang First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao 266590China

In this study,to meet the need for accurate tidal prediction,the accuracy of global ocean tide models was assessed in the South China Sea(0°–26°N,99°–121°E).Seven tide models,namely,DTU10,EOT11 a,FES2014,GOT4.8,HAMTIDE12,OSU12 and TPXO8,were *** accuracy of eight major tidal constituents(i.e.,Q1,O1,P1,K1,N2,M2,S2 and K2)were assessed for the shallow water and coastal areas based on the tidal constants derived from multi-mission satellite altimetry(TOPEX and Jason series)and tide gauge *** root mean square values of each constituent between satellite-derived tidal constants and tide models were found in the range of 0.72–1.90 cm in the deep ocean(depth>200 m)and 1.18–5.63 cm in shallow water area(depth<200 m).Large inter-model discrepancies were noted in the Strait of Malacca and the Taiwan Strait,which could be attributable to the complicated hydrodynamic systems and the paucity of high-quality satellite altimetry *** coastal regions,an accuracy performance was investigated using tidal results from 37 tide gauge *** root sum square values were in the range of 9.35–19.11 cm,with the FES2014 model exhibiting slightly superior performance.

关键词： accuracy assessment tide model satellite altimetry tide gauge South China Sea