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Contact of surfaces and contact characteristics of offset surfaces
CAO Lixin, GONG Hu, LIU Jian
《机械工程前沿(英文)》 2008年 第3卷 第3期 页码 318-324 doi: 10.1007/s11465-008-0067-5
关键词: relative important geometrical relationship geometrical invariant calculation
View-invariant human action recognition via robust locally adaptive multi-view learning
Jia-geng FENG,Jun XIAO
《信息与电子工程前沿(英文)》 2015年 第16卷 第11期 页码 917-920 doi: 10.1631/FITEE.1500080
关键词: View-invariant Action recognition Multi-view learning L1-norm Local learning
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)
Maryam ZANDIYEHVAKILI, Isa HOJAT, Mehdi MAHMUDI
《结构与土木工程前沿(英文)》 2019年 第13卷 第3期 页码 716-724 doi: 10.1007/s11709-018-0508-0
关键词: architectural-structural interaction geometrical features structure architectural form Iranian ancient architecture
Enhancing power generation of piezoelectric bimorph device through geometrical optimization
Action NECHIBVUTE,Albert CHAWANDA,Pearson LUHANGA
《能源前沿(英文)》 2015年 第9卷 第2期 页码 246-246 doi: 10.1007/s11708-015-0360-z
Thiago ANTONINI ALVES,Paulo H. D. SANTOS,Murilo A. BARBUR
《机械工程前沿(英文)》 2015年 第10卷 第3期 页码 263-276 doi: 10.1007/s11465-015-0345-y
In this research, the temperatures of three-dimensional (3D) protruding heaters mounted on a conductive substrate in a horizontal rectangular channel with laminar airflow are related to the independent power dissipation in each heater by using a matrix G+ with invariant coefficients, which are dimensionless. These coefficients are defined in this study as the conjugate influence coefficients (g+) caused by the forced convection-conduction nature of the heaters’ cooling process. The temperature increase of each heater in the channel is quantified to clearly identify the contributions attributed to the self-heating and power dissipation in the other heaters (both upstream and downstream). The conjugate coefficients are invariant with the heat generation rate in the array of heaters when assuming a defined geometry, invariable fluid and flow rate, and constant substrate and heater conductivities. The results are numerically obtained by considering three 3D protruding heaters on a two-dimensional (2D) array by ANSYS/FluentTM 15.0 software. The conservation equations are solved by a coupled procedure within a single calculation domain comprising of solid and fluid regions and by considering a steady state laminar airflow with constant properties. Some examples are shown, indicating the effects of substrate thermal conductivity and Reynolds number on conjugate influence coefficients.
关键词: channel flow conjugate forced convection-conduction cooling conjugate influence coefficients discrete heating invariant descriptor thermal management
Francesco PENTA,Cesare ROSSI,Sergio SAVINO
《机械工程前沿(英文)》 2016年 第11卷 第2期 页码 184-194 doi: 10.1007/s11465-016-0385-y
This study aims to optimize the geometrical parameters of an under-actuated mechanical finger by conducting a theoretical analysis of these parameters. The finger is actuated by a flexion tendon and an extension tendon. The considered parameters are the tendon guide positions with respect to the hinges. By applying such an optimization, the correct kinematical and dynamical behavior of the closing cycle of the finger can be obtained. The results of this study are useful for avoiding the snap-through and the single joint hyperflexion, which are the two breakdowns most frequently observed during experimentation on prototypes. Diagrams are established to identify the optimum values for the tendon guides position of a finger with specified dimensions. The findings of this study can serve as guide for future finger design.
关键词: tendon-driven fingers mechanical finger design under-actuated mechanical systems
Geometrical nonlinear deformation model and its experimental study on bimorph giant magnetostrictive
LIU Wei, JIA Zhenyuan, WANG Fuji, ZHANG Yongshun, GUO Dongming
《机械工程前沿(英文)》 2008年 第3卷 第3期 页码 313-317 doi: 10.1007/s11465-008-0048-8
关键词: magnetostrictive nonlinear magnetostriction inaccurate geometrical nonlinearity
一种快速均匀的采用尺度不变特征变换描述符进行基于内容的卫星图像配准方法 Article
Hamed BOZORGI, Ali JAFARI
《信息与电子工程前沿(英文)》 2017年 第18卷 第8期 页码 1108-1116 doi: 10.1631/FITEE.1500295
Bing XIA, Yuching WU, Zhanfei HUANG
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 257-266 doi: 10.1007/s11709-012-0163-9
关键词: co-rotational total Lagrangian geometrical nonlinearity fire elasto-plastic
Kinematical synthesis of an inversion of the double linked fourbar for morphing wing applications
J. AGUIRREBEITIA, R. AVILéS, I. FERNáNDEZ, M. ABASOLO
《机械工程前沿(英文)》 2013年 第8卷 第1期 页码 17-32 doi: 10.1007/s11465-013-0364-5
This paper presents the kinematical features of an inversion of the double linked fourbar for morphing wing purposes. The structure of the mechanism is obtained using structural synthesis concepts, from an initial conceptual schematic. Then, kinematic characteristics as instant center of rotation, lock positions, dead point positions and uncertainty positions are derived for this mechanism in order to face the last step, the dimensional synthesis; in this sense, two kinds of dimensional synthesis are arranged to guide the wing along two positions, and to fulfill with the second one some aerodynamic and minimum actuation energy related issues.
关键词: morphing wing structural synthesis dimensional synthesis geometrical kinematics
丁力行,何立群,陈祖铭,刘仙萍,季杰
《中国工程科学》 2010年 第12卷 第8期 页码 88-93
建筑墙体表面的太阳直射辐射投影及辐射强度随时间发生很大变化,该变化在已有的动态热过程算法框架内很难直接计算。根据建筑传热模型特点和计算机图形学原理,构建了动态热过程的建筑几何模型,该模型将建筑空间抽象为由矢量平面围成的空间区域的集合;提出了建筑几何模型的核心计算方法,即三维空间内直线与表面的矢量运算。该建筑几何模型能解决建筑动态热过程中直接计算建筑墙体表面之间的太阳直射辐射换热和太阳直射辐射投影等问题,并对空气流通、楼房之间的相互遮阳和光污染等问题的研究也具有实际意义。
黄灿,卜一之,张清华
《中国工程科学》 2009年 第11卷 第1期 页码 87-91
以苏通长江大桥为研究对象,通过数值仿真分析验证了几何控制原理的正确性。通过对施工过程中临时荷载和环境温度对于结构线形影响的系统分析和研究结果表明,在考虑施工全过程几何非线性影响的条件下,临时荷载及环境温度等因素仅影响施工过程中的结构状态,基本不影响成桥的结构线形和内力状态,几何控制原理适用于超大斜拉桥施工控制,采用几何控制原理能够获得良好的施工控制结果。
鸡尾酒会问题的技术回顾、当前进展及未来挑战 Review
Yan-min QIAN, Chao WENG, Xuan-kai CHANG, Shuai WANG, Dong YU
《信息与电子工程前沿(英文)》 2018年 第19卷 第1期 页码 40-63 doi: 10.1631/FITEE.1700814
Xun Liu, Yin Zhang, San-yuan Zhang, Ying Wang, Zhong-yan Liang, Xiu-zi Ye,star.liuxun@gmail.com,yinzh@zju.edu.cn,syzhang@zju.edu.cn,maggiewang0427@gmail.com
《信息与电子工程前沿(英文)》 2015年 第16卷 第5期 页码 346-357 doi: 10.1631/FITEE.1500026
标题 作者 时间 类型 操作
Contact of surfaces and contact characteristics of offset surfaces
CAO Lixin, GONG Hu, LIU Jian
期刊论文
View-invariant human action recognition via robust locally adaptive multi-view learning
Jia-geng FENG,Jun XIAO
期刊论文
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
The role of geometrical features in the architectural-structural interaction: Some case studies of the
Maryam ZANDIYEHVAKILI, Isa HOJAT, Mehdi MAHMUDI
期刊论文
Enhancing power generation of piezoelectric bimorph device through geometrical optimization
Action NECHIBVUTE,Albert CHAWANDA,Pearson LUHANGA
期刊论文
An invariant descriptor for conjugate forced convection-conduction cooling of 3D protruding heaters in
Thiago ANTONINI ALVES,Paulo H. D. SANTOS,Murilo A. BARBUR
期刊论文
Analysis of suitable geometrical parameters for designing a tendon-driven under-actuated mechanical finger
Francesco PENTA,Cesare ROSSI,Sergio SAVINO
期刊论文
Geometrical nonlinear deformation model and its experimental study on bimorph giant magnetostrictive
LIU Wei, JIA Zhenyuan, WANG Fuji, ZHANG Yongshun, GUO Dongming
期刊论文
Implementation of total Lagrangian formulation for the elasto-plastic analysis of plane steel frames exposed to fire
Bing XIA, Yuching WU, Zhanfei HUANG
期刊论文
Kinematical synthesis of an inversion of the double linked fourbar for morphing wing applications
J. AGUIRREBEITIA, R. AVILéS, I. FERNáNDEZ, M. ABASOLO
期刊论文