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Improved directional-distance filter
JIN Lianghai, LI Dehua
《机械工程前沿(英文)》 2008年 第3卷 第2期 页码 205-211 doi: 10.1007/s11465-008-0025-2
关键词: information distance-weighted directional-distance ADWDDF traditional DDF spatial-distance weighting
Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,
《机械工程前沿(英文)》 2010年 第5卷 第3期 页码 261-269 doi: 10.1007/s11465-010-0100-3
关键词: microgear optical distance measurement profile deviation CWL sensor micromechanical technology (MMT)
New method of fault diagnosis of rotating machinery based on distance of information entropy
Houjun SU, Tielin SHI, Fei CHEN, Shuhong HUANG
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 249-253 doi: 10.1007/s11465-011-0124-3
This paper introduces the basic conception of information fusion and some fusion diagnosis methods commonly used nowadays in rotating machinery. From the thought of the information fusion, a new quantitative feature index monitoring and diagnosing the vibration fault of rotating machinery, which is called distance of information entropy, is put forward on the basis of the singular spectrum entropy in time domain, power spectrum entropy in frequency domain, wavelet energy spectrum entropy, and wavelet space feature entropy in time-frequency domain. The mathematic deduction suggests that the conception of distance of information entropy is accordant with the maximum subordination principle in the fuzzy theory. Through calculation it has been proved that this method can effectively distinguish different fault types. Then, the accuracy of rotor fault diagnosis can be improved through the curve chart of the distance of information entropy at multi-speed.
关键词: rotating machinery information fusion fault diagnosis Information entropy distance of the information entropy
Efficient utilization of wind power: Long-distance transmission or local consumption?
Yuanzhang SUN, Xiyuan MA, Jian XU, Yi BAO, Siyang LIAO
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 440-455 doi: 10.1007/s11465-017-0440-3
Excess wind power produced in wind-intensive areas is normally delivered to remote load centers via long-distance transmission lines. This paper presents a comparison between long-distance transmission, which has gained popularity, and local energy consumption, in which a fraction of the generated wind power can be locally consumed by energy-intensive industries. First, the challenges and solutions to the long-distance transmission and local consumption of wind power are presented. Then, the two approaches to the utilization of wind power are compared in terms of system security, reliability, cost, and capability to utilize wind energy. Finally, the economic feasibility and technical feasibility of the local consumption of wind power are demonstrated by a large and isolated industrial power system, or supermicrogrid, in China. The coal-fired generators together with the short-term interruptible electrolytic aluminum load in the supermicrogrid are able to compensate for the intermittency of wind power. In the long term, the transfer of high-energy-consumption industries to wind-rich areas and their local consumption of the available wind power are beneficial.
关键词: wind power long-distance transmission local consumption supermicrogrid
Cracking resistance performance of super vertical-distance pumped SFRC
JIANG Jinyang, SUN Wei, ZHANG Yunsheng, CHEN Cuicui, WANG Jing
《结构与土木工程前沿(英文)》 2008年 第2卷 第2期 页码 179-183 doi: 10.1007/s11709-008-0018-6
Variable eccentric distance-based tool path generation for orthogonal turn-milling
Fangyu PENG,Wei WANG,Rong YAN,Xianyin DUAN,Bin LI
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 352-366 doi: 10.1007/s11465-015-0361-y
This study proposes an algorithm for maximizing strip width in orthogonal turn-milling based on variable eccentric distance. The machining error model is first established based on the local cutting profile at the contact line. The influencing factors of the strip width are then investigated to analyze their features and determine an optimizing strategy. The optimized model for maximum machining strip width is formulated by adopting a variable eccentric distance. Hausdorff distance and Fréchet distance are introduced in this study to implement the constraint function of the machining error in the optimized model. The computing procedure is subsequently provided. Simulations and experiments have been conducted to verify the effectiveness of the proposed algorithm.
关键词: orthogonal turn-milling variable eccentric distance local cutting profile machining strip-width maximization
姚清林
《中国工程科学》 2009年 第11卷 第6期 页码 153-158
远程公平化是偏向于远程的公平,旨在寻求系统整体的优化。在一定的约束条件下,通过域的分隔、变形,中心的定位与相应的远程运作机制,可消减不利因素对系统的干扰,扩大结构瓶颈,调优技术性弱点、难点、远点、易忽视点的指标期望与实现值,抑小扬大,隐近就远,弥补系统缺陷,或于不完备的条件下构建 完备系统,保障全局利益与远效,推进减灾管理的科学化,改善各个方面的减灾工作。
李达权,孙伟刚,胡鸿翔
《信息与电子工程前沿(英文)》 2023年 第24卷 第9期 页码 1349-1356 doi: 10.1631/FITEE.2200400
许维青,韩福忠
《中国工程科学》 2010年 第12卷 第12期 页码 56-58
北京地下直径线盾构独头掘进距离达5.2 km,因此隧道贯通精度控制难度大。通过测量精度分析,单纯通过导线测量已不能满足设计规定的贯通限差要求,施工中通过导线直接传递定向、洞内加测陀螺边、地上地下控制网紧密联系等辅助方法,提高了贯通横向误差的精度,达到了预期效果。
An autonomous miniature wheeled robot based on visual feedback control
CHEN Haichu
《机械工程前沿(英文)》 2007年 第2卷 第2期 页码 197-200 doi: 10.1007/s11465-007-0033-7
关键词: measuring distance autonomous locomotion advantage navigation
采用嵌入时空距离的混合蚁群算法求解一类受限车辆路径问题 Research Article
冯振辉1,2,肖人彬1,3
《信息与电子工程前沿(英文)》 2023年 第24卷 第7期 页码 1062-1079 doi: 10.1631/FITEE.2200585
Feasibility analysis of mixed-income housing in China
TIAN Ye, BI Xiangyang, LI Dexiang
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 371-377 doi: 10.1007/s11709-007-0050-y
关键词: beneficial distance analysis harmonious development hypothesis perspective
杜祥琬
《中国工程科学》 2001年 第3卷 第2期 页码 21-24
高能激光的产生、传输和应用是现代激光技术和光学工程的一个重要发展方向。它不仅涉及到一系列物理问题,还有赖于多项要求极高的工程技术问题。文章提出了8个与高能激光有关的应用光学问题,包括高能激光器、高质量光学元器件、先进的自适应光学技术、非线性光学相共轭技术、变频技术及光束相干合成技术等。着重阐明对它们的要求和可能的发展方向。
ZHOU Hongbo, CHEN Zhuchang
《结构与土木工程前沿(英文)》 2007年 第1卷 第4期 页码 458-463 doi: 10.1007/s11709-007-0062-7
面向多类不平衡学习的一对多海林格距离决策树研究 Research Articles
董明刚1,2,刘明1,2,敬超1,2,3
《信息与电子工程前沿(英文)》 2022年 第23卷 第2期 页码 278-290 doi: 10.1631/FITEE.2000417
标题 作者 时间 类型 操作
Application and evaluation of optical distance measurements in geometrical quality testing of microgears
Albert ALBERS, Duotai PAN, Leif MARXEN, Claudia BECKE,
期刊论文
New method of fault diagnosis of rotating machinery based on distance of information entropy
Houjun SU, Tielin SHI, Fei CHEN, Shuhong HUANG
期刊论文
Efficient utilization of wind power: Long-distance transmission or local consumption?
Yuanzhang SUN, Xiyuan MA, Jian XU, Yi BAO, Siyang LIAO
期刊论文
Cracking resistance performance of super vertical-distance pumped SFRC
JIANG Jinyang, SUN Wei, ZHANG Yunsheng, CHEN Cuicui, WANG Jing
期刊论文
Variable eccentric distance-based tool path generation for orthogonal turn-milling
Fangyu PENG,Wei WANG,Rong YAN,Xianyin DUAN,Bin LI
期刊论文
Analysis of effect of different construction methods of piles on the end effect on skin friction of piles
ZHOU Hongbo, CHEN Zhuchang
期刊论文