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A job-insertion heuristic for minimizing the mean flowtime in dynamic flowshops
Guang GUO, Bo WU, Shuzi YANG
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 197-202 doi: 10.1007/s11465-011-0211-5
A new adaptive job-insertion based heuristic is presented to minimize the mean flowtime in a dynamic flowshop consisting of machines. Job orders arrive to the system randomly, and the job arrival or release dates are not known in advance. The heuristic is derived by inserting new jobs into the scheduled sequence as needed when the machine becomes free. Computation results indicate that the proposed heuristic performs 2.7%–10.8% better than the SPT dispatching rule, which is currently one of the most effective methods for minimizing the mean flowtime in dynamic flowshops.
关键词: scheduling dynamic flowshops flowtime heuristic mean flowtime
Numerical analysis of nonlinear dynamic behavior of earth dams
Babak EBRAHIMIAN
《结构与土木工程前沿(英文)》 2011年 第5卷 第1期 页码 24-40 doi: 10.1007/s11709-010-0082-6
关键词: earth dam numerical nonlinear response dynamic analysis earthquake dam height
Construction of interfacial dynamic bonds for high performance lignin/polymer biocomposites
《化学科学与工程前沿(英文)》 2023年 第17卷 第10期 页码 1372-1388 doi: 10.1007/s11705-023-2302-3
Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,
《化学科学与工程前沿(英文)》 2010年 第4卷 第3期 页码 250-256 doi: 10.1007/s11705-009-0281-7
关键词: dynamic simulation molecular dynamic behavior molecule Adsorption Chromatography
张进之,段春华
《中国工程科学》 2000年 第2卷 第6期 页码 67-72
文章介绍了应用解析板形方程推出板形最佳轧制规程和板形板厚协调控制新方法。该方法的主要特点:系统中采用了静、动态负荷分配,动态设定厚度自动控制系统(DAGC)完成了板形板厚的闭环控制,在算法中采用了贝尔曼动态规划。新方法将会改变目前轧机设计和控制思想:设计合理刚度,强调调度计划、配置轧辊凸度和优化轧制规程等方面的作用,实现信息控制。
Modelling of dynamic contact length in rail grinding process
null
《机械工程前沿(英文)》 2014年 第9卷 第3期 页码 242-248 doi: 10.1007/s11465-014-0305-y
Rails endure frequent dynamic loads from the passing trains for supporting trains and guiding wheels. The accumulated stress concentrations will cause the plastic deformation of rail towards generating corrugations, contact fatigue cracks and also other defects, resulting in more dangerous status even the derailment risks. So the rail grinding technology has been invented with rotating grinding stones pressed on the rail with defects removal. Such rail grinding works are directed by experiences rather than scientifically guidance, lacking of flexible and scientific operating methods. With grinding control unit holding the grinding stones, the rail grinding process has the characteristics not only the surface grinding but also the running railway vehicles. First of all, it’s important to analyze the contact length between the grinding stone and the rail, because the contact length is a critical parameter to measure the grinding capabilities of stones. Moreover, it’s needed to build up models of railway vehicle unit bonded with the grinding stone to represent the rail grinding car. Therefore the theoretical model for contact length is developed based on the geometrical analysis. And the calculating models are improved considering the grinding car’s dynamic behaviors during the grinding process. Eventually, results are obtained based on the models by taking both the operation parameters and the structure parameters into the calculation, which are suitable for revealing the process of rail grinding by combining the grinding mechanism and the railway vehicle systems.
关键词: rail grinding contact length dynamic model Hamiltonian system grinding stone rail grinding car
Finding buckling points for nonlinear structures by dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Hossein ESTIRI
《结构与土木工程前沿(英文)》 2020年 第14卷 第1期 页码 23-61 doi: 10.1007/s11709-019-0549-z
关键词: load factor external work dynamic relaxation static equilibrium path large displacement
Nonlinear analysis of cable structures using the dynamic relaxation method
Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI
《结构与土木工程前沿(英文)》 2021年 第15卷 第1期 页码 253-274 doi: 10.1007/s11709-020-0639-y
关键词: nonlinear analysis cable structure stiffness matrix dynamic relaxation method
Effect of carbon black on the dynamic moduli of asphalt mixtures and its master curves
Chuangmin LI, Fanbo NING, Yuanyuan LI
《结构与土木工程前沿(英文)》 2019年 第13卷 第4期 页码 918-925 doi: 10.1007/s11709-019-0526-6
关键词: dynamic modulus carbon black master curve modified asphalt asphalt mixture
Analytical dynamic solution of a flexible cable-suspended manipulator
Mahdi BAMDAD
《机械工程前沿(英文)》 2013年 第8卷 第4期 页码 350-359 doi: 10.1007/s11465-013-0271-9
Cable-suspended manipulators are used in large scale applications with, heavy in weight and long in span cables. It seems impractical to maintain cable assumptions of smaller robots for large scale manipulators. The interactions among the cables, platforms and actuators can fully evaluate the coupled dynamic analysis. The structural flexibility of the cables becomes more pronounced in large manipulators. In this paper, an analytic solution is provided to solve cable vibration. Also, a closed form solution can be adopted to improve the dynamic response to flexibility. The output is provided by the optimal torque generation subject to the actuator limitations in a mechatronic sense. Finally, the performance of the proposed algorithm is examined through simulations.
Chengyuan LIANG, Fang YUAN, Xuedong CHEN, Wei JIANG, Lizhan ZENG, Xin LUO
《机械工程前沿(英文)》 2019年 第14卷 第3期 页码 255-272 doi: 10.1007/s11465-019-0538-x
关键词: nano-precision positioning stage analysis and design structural and dynamic parameters dynamic accuracy systematic modeling
Qiong CAI, Nigel P. BRANDON, Claire S. ADJIMAN,
《能源前沿(英文)》 2010年 第4卷 第2期 页码 211-222 doi: 10.1007/s11708-010-0037-6
关键词: hydrogen production renewable energy solid oxide electrolyser cell 1D dynamic model dynamic behaviour temperature control
A fast and accurate dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI
《结构与土木工程前沿(英文)》 2019年 第13卷 第1期 页码 176-189 doi: 10.1007/s11709-018-0486-2
关键词: viscous dynamic relaxation time step displacement error geometric nonlinear analysis
《化学科学与工程前沿(英文)》 2022年 第16卷 第7期 页码 1149-1163 doi: 10.1007/s11705-021-2096-0
关键词: carbon dioxide photoreduction computational fluid dynamic simulation kinetic model Langmuir adsorption
Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions
《结构与土木工程前沿(英文)》 页码 915-934 doi: 10.1007/s11709-023-0907-8
关键词: fictitious soil pile soil plug pipe piles high-strain dynamic analysis one-dimensional wave theory pile dynamics
标题 作者 时间 类型 操作
A job-insertion heuristic for minimizing the mean flowtime in dynamic flowshops
Guang GUO, Bo WU, Shuzi YANG
期刊论文
Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation
Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,
期刊论文
Finding buckling points for nonlinear structures by dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Hossein ESTIRI
期刊论文
Nonlinear analysis of cable structures using the dynamic relaxation method
Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI
期刊论文
Effect of carbon black on the dynamic moduli of asphalt mixtures and its master curves
Chuangmin LI, Fanbo NING, Yuanyuan LI
期刊论文
Comprehensive analysis of the influence of structural and dynamic parameters on the accuracy of nano-precision
Chengyuan LIANG, Fang YUAN, Xuedong CHEN, Wei JIANG, Lizhan ZENG, Xin LUO
期刊论文
Modelling the dynamic response of a solid oxide steam electrolyser to transient inputs during renewable
Qiong CAI, Nigel P. BRANDON, Claire S. ADJIMAN,
期刊论文
A fast and accurate dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI
期刊论文
of carbon dioxide photoreduction process in a laboratory-scale photoreactor by computational fluid dynamic
期刊论文