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Xuewei QI,Ke LI,Walter D. POTTER
《环境科学与工程前沿(英文)》 2016年 第10卷 第2期 页码 341-351 doi: 10.1007/s11783-015-0776-z
关键词: particle swarm optimization (PSO) diversity control estimation of distribution algorithm (EDA) water distribution network (WDN) premature convergence hybrid strategy
《环境科学与工程前沿(英文)》 2023年 第17卷 第11期 doi: 10.1007/s11783-023-1731-z
● A 2D finite-element solute transport model, PRB-Trans, is developed.
关键词: Passive convergence-permeable reactive barrier Numerical modeling Hydraulic behavior assessment Pollutant treatment performance evaluation Influential factors analysis
Guoxia MA, Jinnan WANG, Fang YU, Xiaomin GUO, Yanshen ZHANG, Chao LI
《环境科学与工程前沿(英文)》 2016年 第10卷 第5期 doi: 10.1007/s11783-016-0849-7
关键词: Air pollution Public health Premature deaths Health assessment
《环境科学与工程前沿(英文)》 2022年 第16卷 第12期 doi: 10.1007/s11783-022-1591-y
● A novel PRB configuration based on passive convergent flow effect was proposed.
关键词: Passive convergence-permeable reactive barrier (PC-PRB) Permeable reactive barrier configuration Numerical simulation Hydraulic performance evaluation Sensitivity analysis
Premature melt solidification during mold filling and its influence on the as-cast structure
M. WU, M. AHMADEIN, A. LUDWIG
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 53-65 doi: 10.1007/s11465-017-0437-y
Premature melt solidification is the solidification of a melt during mold filling. In this study, a numerical model is used to analyze the influence of the pouring process on the premature solidification. The numerical model considers three phases, namely, air, melt, and equiaxed crystals. The crystals are assumed to have originated from the heterogeneous nucleation in the undercooled melt resulting from the first contact of the melt with the cold mold during pouring. The transport of the crystals by the melt flow, in accordance with the so-called “big bang” theory, is considered. The crystals are assumed globular in morphology and capable of growing according to the local constitutional undercooling. These crystals can also be remelted by mixing with the superheated melt. As the modeling results, the evolutionary trends of the number density of the crystals and the volume fraction of the solid crystals in the melt during pouring are presented. The calculated number density of the crystals and the volume fraction of the solid crystals in the melt at the end of pouring are used as the initial conditions for the subsequent solidification simulation of the evolution of the as-cast structure. A five-phase volume-average model for mixed columnar-equiaxed solidification is used for the solidification simulation. An improved agreement between the simulation and experimental results is achieved by considering the effect of premature melt solidification during mold filling. Finally, the influences of pouring parameters, namely, pouring temperature, initial mold temperature, and pouring rate, on the premature melt solidification are discussed.
关键词: premature solidification mold filling as-cast structure modeling
Reliability mesh convergence analysis by introducing expanded control variates
Alireza GHAVIDEL, Mohsen RASHKI, Hamed GHOHANI ARAB, Mehdi AZHDARY MOGHADDAM
《结构与土木工程前沿(英文)》 2020年 第14卷 第4期 页码 1012-1023 doi: 10.1007/s11709-020-0631-6
关键词: finite element reliability mesh convergence analysis expanded control variates
洪学海,蔡迪
《中国工程科学》 2020年 第22卷 第4期 页码 18-23 doi: 10.15302/J-SSCAE-2020.04.015
运营技术(OT)与信息技术(IT)的融合成为工业数字化转型和制造业高质量发展的关键。本文开展了OT与IT融合发展的需求分析,从建立工业物联网、发展跨平台分析框架、开发开放性平台、推行基于云端部署的数据采集与监控系统等方面梳理了OT与IT融合的现状;提出了建立OT与IT融合的全套计算栈、持续推进工业互联网、加强OT与IT融合的安全保障等未来两类技术体系融合的技术路径。研究建议,强化OT与IT融合的技术标准化应用,建立包括评估关键资产风险、关注底层数据、加强检测系统开发、分离通信功能、应用人工智能技术在内的OT与IT融合的安全保障体系,以此为我国“互联网 +”行动在工业制造领域的深度发展提供关键支撑。
Convergence performance comparisons of PID, MRAC, and PID+MRAC hybrid controller
Dan ZHANG,Bin WEI
《机械工程前沿(英文)》 2016年 第11卷 第2期 页码 213-217 doi: 10.1007/s11465-016-0386-x
This study proposes a hybrid controller by combining a proportional-integral-derivative (PID) control and a model reference adaptive control (MRAC), which named as PID+MRAC controller. The convergence performances of the PID control, MRAC, and hybrid PID+MRAC are also compared. Through the simulation in Matlab, the results show that the convergence speed and performance of the MRAC and the PID+MRAC controller are better than those of the PID controller. In addition, the convergence performance of the hybrid control is better than that of the MRAC control.
关键词: proportional-integral-derivative (PID) control model reference adaptive control hybrid control convergence speed comparison
A new type of quadratic acceleration method
Changqing LI, Menglin LOU,
《结构与土木工程前沿(英文)》 2010年 第4卷 第3期 页码 302-310 doi: 10.1007/s11709-010-0026-1
关键词: polynomial acceleration method convergence stability square acceleration method
A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0006-x
关键词: isogeometric analysis Kirchhoff–Love cylindrical shell free vibration frequency error convergence
战略性新兴产业多领域知识融合路径研究——基于引用网络和文本信息的分析
刘宇飞,苗仲桢,黎凌峰,孔德婧
《中国工程科学》 2020年 第22卷 第2期 页码 120-129 doi: 10.15302/J-SSCAE-2020.02.016
针对战略性新兴产业开展技术融合过程分析,有助于深入理解产业技术的产生过程和发展规律,从而捕捉领域发展动向、推动产业健康发展。本文针对战略性新兴产业中呈现融合发展趋势且备受社会关注的高端装备制造、新一代信息技术、新医药、新能源4个技术领域进行多案例研究,以期识别出技术融合发展的路径和程度。采用基于引用网络和文本信息的知识融合路径分析方法,使用图神经网络同时将论文的引用网络、标题和摘要信息编码为向量;分析4个技术领域的论文数据,识别出了 5 条技术融合路径。研究结果表明,信息技术与数控设备技术、生物医药与太阳能光伏技术均呈现深度融合的趋势,且前者的融合程度更为深入;数控设备与太阳能光伏技术、信息技术与太阳能光伏技术也呈现融合趋势,但限于发展时间较短而显融合程度较浅;数控设备与生物医药技术领域尚未呈现融合发展的趋势。
Convergence to real-time decision making
James M. TIEN
《工程管理前沿(英文)》 2020年 第7卷 第2期 页码 204-222 doi: 10.1007/s42524-019-0040-5
关键词: real-time decision making services goods ServGoods Big Data Internet of Things artificial intelligence wireless communications
黎强
《中国工程科学》 2003年 第5卷 第6期 页码 59-62
以矿物加工领域新出现的空气重介质流化床选矿方法提出的背景和实现途径为基础,运用发散—收敛模型讨论了解决工程技术问题时创造性成果的产生机制,分析了创造性思维的应用过程及其启示作用。
Ping ZHANG, Guoliang DING
《能源前沿(英文)》 2010年 第4卷 第4期 页码 535-541 doi: 10.1007/s11708-010-0113-y
关键词: algorithm convergence heat exchanger modeling transient
时变网络的收敛性及其应用 Research Articles
王庆领
《信息与电子工程前沿(英文)》 2021年 第22卷 第1期 页码 1-140 doi: 10.1631/FITEE.2000160
标题 作者 时间 类型 操作
Estimation of distribution algorithm enhanced particle swarm optimization for water distribution network optimization
Xuewei QI,Ke LI,Walter D. POTTER
期刊论文
Numerical modeling and performance evaluation of passive convergence-permeable reactive barrier (PC-PRB
期刊论文
Assessing the premature death due to ambient particulate matter in China’s urban areas from 2004 to 2013
Guoxia MA, Jinnan WANG, Fang YU, Xiaomin GUO, Yanshen ZHANG, Chao LI
期刊论文
Passive convergence-permeable reactive barrier (PC-PRB): An effective configuration to enhance hydraulic
期刊论文
Premature melt solidification during mold filling and its influence on the as-cast structure
M. WU, M. AHMADEIN, A. LUDWIG
期刊论文
Reliability mesh convergence analysis by introducing expanded control variates
Alireza GHAVIDEL, Mohsen RASHKI, Hamed GHOHANI ARAB, Mehdi AZHDARY MOGHADDAM
期刊论文
Convergence performance comparisons of PID, MRAC, and PID+MRAC hybrid controller
Dan ZHANG,Bin WEI
期刊论文
Predictor-corrector algorithm for solving quasi-separated-flow and transient distributed-parameter model for heat exchangers
Ping ZHANG, Guoliang DING
期刊论文