检索范围:
排序: 展示方式:
Hulin HUANG, Xiaoming ZHOU,
《能源前沿(英文)》 2010年 第4卷 第2期 页码 155-160 doi: 10.1007/s11708-009-0063-4
关键词: magnetohydrodynamic magnetic fields thermocapillary convection critical temperature difference oscillatory convection two-layer fluid system
Optimal Method of Capacitated Lot-Sizing Planning in Manufacturing Systems
CHANG Jian-feng, ZHONG Yue-xian, HAN Zan-dong
《机械工程前沿(英文)》 2006年 第1卷 第1期 页码 67-70 doi: 10.1007/s11465-005-0020-9
This paper analyzes the capacitated lot-sizing problem considering an individual machine s production capacity using a two-layer hierarchical method to minimize the sum of the dynamic inventory cost and the overtime penalty cost. The genetic algorithm, the parameter linear programming method, and a heuristic method were used in the developed method. The method uses the genetic operator to define the lot-sizing matrix (the first layer), linear programming to determine eachmachine' s schedule (the second layer) according to the lot-sizing matrix, and the heuristic method to verify the feasibility of the solutions by adjusting them to meet the constraint requirements. The scheduling of machines in a press shop demonstrates the effectiveness of the algorithm. The result shows that the algorithm is convergent.
关键词: heuristic two-layer hierarchical algorithm constraint developed
Hierarchical fractal structure of perfect single-layer graphene
T. Zhang, K. Ding
《机械工程前沿(英文)》 2013年 第8卷 第4期 页码 371-382 doi: 10.1007/s11465-013-0279-1
The atomic lattice structure of perfect single-layer graphene that can actually be regarded as a kind of hierarchical fractal structure from the perspective of fractal geometry was studied for the first time. Three novel and special discoveries on hierarchical fractal structure and sets were unveiled upon examination of the regular crystal lattices of the single-layer graphene. The interior fractal-type structure was discovered to be the fifth space-filling curve from physical realm. Two efficient methods for calculating the fractal dimension of this fresh member was also provided. The outer boundary curve had a fractal dimension equal to one, and a multi-fractal structure from a naturally existing material was found for the first time. A series of strict self-similar hexagons comprised a rotating fractal set. These hexagons slewed at a constant counterclockwise angle of 19.1° when observed from one level to the next higher level. From the perspective of fractal geometry, these pioneering discoveries added three new members to the existing regular fractal structures and sets. A fundamental example of a multi-fractal structure was also presented.
关键词: hierarchical fractal structure fractal dimension the fifth space-filling curve multi-fractal structure
双层高通量计算——包括翘曲情况下的有效质量计算 Article
Andrew Supka, Nicholas A. Mecholsky, Marco Buongiorno Nardelli, Stefano Curtarolo, Marco Fornari
《工程(英文)》 2022年 第10卷 第3期 页码 74-80 doi: 10.1016/j.eng.2021.03.031
本文使用了双层高通量计算。在涉及改变晶体结构和(或)化学成分的第一层中,本文分析了选定的IIIV半导体、填充和未填充的方钴矿,以及岩盐和层状硫属化物。第二层在整个布里渊区(BZ)中搜索费米能级1.5 eV (1 eV = 1.602176×10−19 J)范围内的临界点,并通过计算有效质量来表征这些点。本文介绍了几种从第一原理计算有效质量的方法并对它们进行了比较。本文使用的方法还包括计算翘曲临界点的态密度有效质量,由于临界点存在潜在非解析性,传统方法无法给出一致的结果。本文证明了考虑能带结构的全部复杂性以及计算有效质量的互补方法价值的必要性。本文还通过计算证明翘曲仅发生在有退化性的情况下。
Combined reticular blind drainage and vertical hierarchical drainage system for landfills located in
Wenjing LU,Zhonge FU,Yan ZHAO
《环境科学与工程前沿(英文)》 2016年 第10卷 第1期 页码 177-184 doi: 10.1007/s11783-014-0710-9
关键词: landfill reticular blind drain vertical hierarchical drain guidance and drainage impermeable layer
Yinglie ZHOU, Cunkuan BAO,
《环境科学与工程前沿(英文)》 2010年 第4卷 第1期 页码 82-90 doi: 10.1007/s11783-010-0004-9
关键词: Policy Environmental Assessment (PEA) policy hierarchy PEA hierarchy methodological framework
Layer-like FAU-type zeolites: A comparative view on different preparation routes
Bastian Reiprich, Tobias Weissenberger, Wilhelm Schwieger, Alexandra Inayat
《化学科学与工程前沿(英文)》 2020年 第14卷 第2期 页码 127-142 doi: 10.1007/s11705-019-1883-3
Two-dimensional modeling of sintering of a powder layer on top of nonporous substrate
Tiebing CHEN, Yuwen ZHANG,
《机械工程前沿(英文)》 2010年 第5卷 第2期 页码 143-148 doi: 10.1007/s11465-010-0006-0
Liansuo AN , Zhi WANG , Zhonghe HAN ,
《能源前沿(英文)》 2009年 第3卷 第3期 页码 254-261 doi: 10.1007/s11708-009-0047-4
关键词: wet steam two-phase flow spontaneous condensation numerical simulation flow separation profile loss
基于两级层次特征学习的图像分类方法 Article
Guang-hui SONG,Xiao-gang JIN,Gen-lang CHEN,Yan NIE
《信息与电子工程前沿(英文)》 2016年 第17卷 第9期 页码 897-906 doi: 10.1631/FITEE.1500346
Deep convolutional tree-inspired network: a decision-tree-structured neural network for hierarchical
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 814-828 doi: 10.1007/s11465-021-0650-6
关键词: bearing cross-severity fault diagnosis hierarchical fault diagnosis convolutional neural network decision tree
Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren
《化学科学与工程前沿(英文)》 2018年 第12卷 第4期 页码 780-789 doi: 10.1007/s11705-018-1733-8
关键词: hierarchical ZSM-5 crystal size catalytic cracking Thiele modulus effectiveness factor
Hao XIE,Ruo-feng TONG
《信息与电子工程前沿(英文)》 2016年 第17卷 第1期 页码 32-40 doi: 10.1631/FITEE.1500171
矢量图形作为光栅图像的一种几何表示形式,具有许多优点,例如,定义独立性和编辑功能。将栅格图像转换为矢量图形的一种流行方法是图像网格划分,其目的是找到一个网格以尽可能忠实地表示图像。对于传统的网格划分算法,问题的症结主要在于目标的高非线性度和非平滑度,这使得很难找到理想的最优解。为了改善这种情况,我们提出了一种层次优化算法,解决了从较粗级别到较细级别的问题,并为每个级别提供了其较粗的提升的初始化功能。为了进一步简化问题,将原始的非凸问题转换为线性最小二乘,从而变成凸的,这使问题更容易解决。字典学习框架用于将几何和拓扑完美地结合在一起。然后采用交替方案来求解两个部分。实验表明,对于大多数图像,该算法运行速度快,效果优于现有图像。
关键词: 图像网格化;层次优化;凸化
Facile synthesis of hierarchical flower-like Ag/Cu
Mengyun Wang, Shengbo Zhang, Mei Li, Aiguo Han, Xinli Zhu, Qingfeng Ge, Jinyu Han, Hua Wang
《化学科学与工程前沿(英文)》 2020年 第14卷 第5期 页码 813-823 doi: 10.1007/s11705-019-1854-8
关键词: bimetallic nanostructure hierarchical metal/oxide nanomaterial galvanic replacement electrochemical reduction of CO2
Hierarchical parameter estimation of DFIG and drive train system in a wind turbine generator
Xueping PAN, Ping JU, Feng WU, Yuqing JIN
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 367-376 doi: 10.1007/s11465-017-0429-y
A new hierarchical parameter estimation method for doubly fed induction generator (DFIG) and drive train system in a wind turbine generator (WTG) is proposed in this paper. Firstly, the parameters of the DFIG and the drive train are estimated locally under different types of disturbances. Secondly, a coordination estimation method is further applied to identify the parameters of the DFIG and the drive train simultaneously with the purpose of attaining the global optimal estimation results. The main benefit of the proposed scheme is the improved estimation accuracy. Estimation results confirm the applicability of the proposed estimation technique.
关键词: wind turbine generator DFIG drive train system hierarchical parameter estimation method trajectory sensitivity technique
标题 作者 时间 类型 操作
MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layer
Hulin HUANG, Xiaoming ZHOU,
期刊论文
Optimal Method of Capacitated Lot-Sizing Planning in Manufacturing Systems
CHANG Jian-feng, ZHONG Yue-xian, HAN Zan-dong
期刊论文
双层高通量计算——包括翘曲情况下的有效质量计算
Andrew Supka, Nicholas A. Mecholsky, Marco Buongiorno Nardelli, Stefano Curtarolo, Marco Fornari
期刊论文
Combined reticular blind drainage and vertical hierarchical drainage system for landfills located in
Wenjing LU,Zhonge FU,Yan ZHAO
期刊论文
Hierarchical methodological framework to improve Policy Environmental Assessment: Based on policy layer
Yinglie ZHOU, Cunkuan BAO,
期刊论文
Layer-like FAU-type zeolites: A comparative view on different preparation routes
Bastian Reiprich, Tobias Weissenberger, Wilhelm Schwieger, Alexandra Inayat
期刊论文
Two-dimensional modeling of sintering of a powder layer on top of nonporous substrate
Tiebing CHEN, Yuwen ZHANG,
期刊论文
Numerical study and control method of interaction of nucleation and boundary layer separation in condensing
Liansuo AN , Zhi WANG , Zhonghe HAN ,
期刊论文
Deep convolutional tree-inspired network: a decision-tree-structured neural network for hierarchical
期刊论文
Effect of hierarchical ZSM-5 zeolite crystal size on diffusion and catalytic performance of n-heptane
Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren
期刊论文
Facile synthesis of hierarchical flower-like Ag/Cu
Mengyun Wang, Shengbo Zhang, Mei Li, Aiguo Han, Xinli Zhu, Qingfeng Ge, Jinyu Han, Hua Wang
期刊论文