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Maximum independent set in planning freight railway transportation
Gainanov Damir N., Mladenovic NENAD, Rasskazova V. A.
《工程管理前沿(英文)》 2018年 第5卷 第4期 页码 499-506 doi: 10.15302/J-FEM-2018031
This work is devoted to the problem of planning of freight railway transportation. We define a special conflict graph on the basis of a set of acceptable train routes. The investigation aims to solve the classical combinatorial optimization problem in relation to the maximum independent set of vertices in undirected graphs. The level representation of the graph and its tree are introduced. With use of these constructions, the lower and upper bounds for the number of vertices in the maximum independent set are obtained.
关键词: independent set algorithm planning of transportation two-sided estimate
Peng WEI, Wenwen WANG, Yang YANG, Michael Yu WANG
《机械工程前沿(英文)》 2020年 第15卷 第3期 页码 390-405 doi: 10.1007/s11465-020-0588-0
关键词: level set method topology optimization density-based method level set band
Operating mechanism and set pair analysis model of a sustainable water resources system
Chaoyang DU,Jingjie YU,Huaping ZHONG,Dandan WANG
《环境科学与工程前沿(英文)》 2015年 第9卷 第2期 页码 288-297 doi: 10.1007/s11783-014-0642-4
关键词: sustainable water resources system operating mechanism set pair analysis model Shanghai
Independent cover meshless particle method for complex geotechnical engineering
Jianqiu WU, Yongchang CAI
《结构与土木工程前沿(英文)》 2018年 第12卷 第4期 页码 515-526 doi: 10.1007/s11709-017-0428-4
关键词: meshless method particle method independent cover CTM geotechnical engineering
XFEM schemes for level set based structural optimization
Li LI, Michael Yu WANG, Peng WEI
《机械工程前沿(英文)》 2012年 第7卷 第4期 页码 335-356 doi: 10.1007/s11465-012-0351-2
In this paper, some elegant extended finite element method (XFEM) schemes for level set method structural optimization are proposed. Firstly, two- dimension (2D) and three-dimension (3D) XFEM schemes with partition integral method are developed and numerical examples are employed to evaluate their accuracy, which indicate that an accurate analysis result can be obtained on the structural boundary. Furthermore, the methods for improving the computational accuracy and efficiency of XFEM are studied, which include the XFEM integral scheme without quadrature sub-cells and higher order element XFEM scheme. Numerical examples show that the XFEM scheme without quadrature sub-cells can yield similar accuracy of structural analysis while prominently reducing the time cost and that higher order XFEM elements can improve the computational accuracy of structural analysis in the boundary elements, but the time cost is increasing. Therefore, the balance of time cost between FE system scale and the order of element needs to be discussed. Finally, the reliability and advantages of the proposed XFEM schemes are illustrated with several 2D and 3D mean compliance minimization examples that are widely used in the recent literature of structural topology optimization. All numerical results demonstrate that the proposed XFEM is a promising structural analysis approach for structural optimization with the level set method.
关键词: structural optimization level set method extended finite element method (XFEM) computational accuracy and efficiency
Level set-based isogeometric topology optimization for maximizing fundamental eigenfrequency
Manman XU, Shuting WANG, Xianda XIE
《机械工程前沿(英文)》 2019年 第14卷 第2期 页码 222-234 doi: 10.1007/s11465-019-0534-1
关键词: topology optimization level set method isogeometric analysis eigenfrequency
金履忠
《中国工程科学》 2005年 第7卷 第7期 页码 1-6
论证了自主开发在政治、军事、经济、安全、科技等方面的重大意义。建议用10~15年的时间,使我国的绝大多数产业具备自主开发和国际竞争能力;分析了实现这个目标是完全可能的。最后提出了应在思想观念、精神状态、法律法规、政策、体制、宣传舆论等方面创造有利于自主开发的环境。
《环境科学与工程前沿(英文)》 2022年 第16卷 第3期 doi: 10.1007/s11783-021-1471-x
• Hg bioaccumulation by phytoplankton varies among aquatic ecosystems.
关键词: Plankton Hg bioaccumulation Physiological characteristics A cross-system analysis Nutrient compositions Global data set
The research on structural damage identification using rough set and integrated neural network
Juelong LI, Hairui LI, Jianchun XING, Qiliang YANG
《机械工程前沿(英文)》 2013年 第8卷 第3期 页码 305-310 doi: 10.1007/s11465-013-0259-5
A huge amount of information and identification accuracy in large civil engineering structural damage identification has not been addressed yet. To efficiently solve this problem, a new damage identification method based on rough set and integrated neural network is first proposed. In brief, rough set was used to reduce attributes so as to decrease spatial dimensions of data and extract effective features. And then the reduced attributes will be put into the sub-neural network. The sub-neural network can give the preliminary diagnosis from different aspects of damage. The decision fusion network will give the final damage identification results. The identification examples show that this method can simplify the redundant information to reduce the neural network model, making full use of the range of information to effectively improve the accuracy of structural damage identification.
关键词: rough set integrated neural network damage identification decision making fusion
张江,林华,贺仲雄
《中国工程科学》 2002年 第4卷 第3期 页码 40-47
通过综合经典集合、模糊集合、可拓集合、Vague集合、粗糙集合、集对分析、FHW(模糊灰色物元空间)、FEEC(模糊可拓经济控制)等多种理论,提出了统一集概念,并详细讨论统一集的各种运算以及相关性质。从分析集合理论和人类思维形式之间的关系人手,把统一集理论初步应用到模式识别、聚类分析、逻辑推理、机器学习、智能决策等多种人工智能领域,指出了集合论及其运算系统与逻辑推理系统的等价关系。统一集能对现有的理论进行总结、统一,还为开辟崭新的集合论、逻辑推理方法提供很好的理论基础。
Arash SEKHAVATIAN, Asskar Janalizadeh CHOOBBASTI
《结构与土木工程前沿(英文)》 2019年 第13卷 第1期 页码 66-80 doi: 10.1007/s11709-018-0461-y
关键词: uncertainty reliability analysis deep excavations random set method finite difference method
Data mining diagnosis system based on rough set theory for boilers in thermal power plants
YANG Ping
《机械工程前沿(英文)》 2006年 第1卷 第2期 页码 162-167 doi: 10.1007/s11465-006-0017-z
Bang-hua YANG,Liang-fei HE,Lin LIN,Qian WANG
《信息与电子工程前沿(英文)》 2015年 第16卷 第6期 页码 486-496 doi: 10.1631/FITEE.1400299
关键词: Ocular artifacts Electroencephalogram (EEG) Electrooculogram (EOG) Brain-computer interface (BCI) Spatial constraint independent component analysis based recursive least squares (SCICA-RLS)
Yingjun WANG,David J. BENSON
《机械工程前沿(英文)》 2016年 第11卷 第4期 页码 328-343 doi: 10.1007/s11465-016-0403-0
In this paper, an approach based on the fast point-in-polygon (PIP) algorithm and trimmed elements is proposed for isogeometric topology optimization (TO) with arbitrary geometric constraints. The isogeometric parameterized level-set-based TO method, which directly uses the non-uniform rational basis splines (NURBS) for both level set function (LSF) parameterization and objective function calculation, provides higher accuracy and efficiency than previous methods. The integration of trimmed elements is completed by the efficient quadrature rule that can design the quadrature points and weights for arbitrary geometric shape. Numerical examples demonstrate the efficiency and flexibility of the method.
关键词: isogeometric analysis topology optimization level set method arbitrary geometric constraint trimmed element
《能源前沿(英文)》 2023年 第17卷 第2期 页码 211-227 doi: 10.1007/s11708-022-0847-3
关键词: end-to-end learning microgrids voltage profile improvement generative adversarial network
标题 作者 时间 类型 操作
Maximum independent set in planning freight railway transportation
Gainanov Damir N., Mladenovic NENAD, Rasskazova V. A.
期刊论文
Level set band method: A combination of density-based and level set methods for the topology optimization
Peng WEI, Wenwen WANG, Yang YANG, Michael Yu WANG
期刊论文
Operating mechanism and set pair analysis model of a sustainable water resources system
Chaoyang DU,Jingjie YU,Huaping ZHONG,Dandan WANG
期刊论文
Independent cover meshless particle method for complex geotechnical engineering
Jianqiu WU, Yongchang CAI
期刊论文
Level set-based isogeometric topology optimization for maximizing fundamental eigenfrequency
Manman XU, Shuting WANG, Xianda XIE
期刊论文
Characteristics of plankton Hg bioaccumulations based on a global data set and the implications for aquatic
期刊论文
The research on structural damage identification using rough set and integrated neural network
Juelong LI, Hairui LI, Jianchun XING, Qiliang YANG
期刊论文
Application of random set method in a deep excavation: based on a case study in Tehran cemented alluvium
Arash SEKHAVATIAN, Asskar Janalizadeh CHOOBBASTI
期刊论文
Data mining diagnosis system based on rough set theory for boilers in thermal power plants
YANG Ping
期刊论文
Fast removal of ocular artifacts from electroencephalogram signals using spatial constraint independent
Bang-hua YANG,Liang-fei HE,Lin LIN,Qian WANG
期刊论文
Geometrically constrained isogeometric parameterized level-set based topology optimization via trimmed
Yingjun WANG,David J. BENSON
期刊论文