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Biomechanics of knee joint – A review
Bhaskar Kumar MADETI,Srinivasa Rao CHALAMALASETTI,S K Sundara siva rao BOLLA PRAGADA
《机械工程前沿(英文)》 2015年 第10卷 第2期 页码 176-186 doi: 10.1007/s11465-014-0306-x
The present paper is to know how the work is carried out in the field of biomechanics of knee. Various model formulations are discussed and further classified into mathematical model, two-dimensional model and three-dimensional model. Knee geometry is a crucial part of human body movement, in which how various views of knee is shown in different planes and how the forces act on tibia and femur are studied. It leads to know the forces acting on the knee joint. Experimental studies of knee geometry and forces acting on knee shown by various researchers have been discussed, and comparisons of results are made. In addition, static and dynamic analysis of knee has been also discussed respectively to some extent.
关键词: biomechanics knee geometry ligaments squat femorotibial joint finite element method
Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)
Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA
《机械工程前沿(英文)》 2016年 第11卷 第1期 页码 44-59 doi: 10.1007/s11465-015-0360-z
During the second half of the twentieth century, Soviet scientists were among the world leaders in the theory and geometry of gearing or the theoretical fundamentals of designing gears and gear-cutting tools. The authors of the current paper review works related to the development of the theory of gearing (TG) written in Russian from the mid-1930s to the present. Overall, the review covers more than 400 publications of nearly 200 authors (among more than 1000 studied works). This review involves some works on gear strength and accuracy to attract more experts.
This paper presents a short list of works from the seventeenth century to the nineteenth century and discusses the basic concepts of the TG. This paper also includes a review of more than 160 papers in Russian for the period of 1935–1975, which is the “golden age” of the TG. The main features and achievements during this period are also considered.
The distinctive feature of this review is the use of diagrams that visually present TG experts and the dates and themes of their published works. The diagrams also show the following aspects: 1) The most popular and important themes in a specific period, 2) the most important publications on the themes of interest to readers, and 3) the direction of the works and scope of interests of every researcher.
关键词: theory of gearing (TG) gear geometry generating surface gear synthesis gear analysis
Experimental study on slender buckling-restrained knee braces with round steel bar cores
《结构与土木工程前沿(英文)》 2023年 第17卷 第1期 页码 99-121 doi: 10.1007/s11709-022-0875-4
关键词: weld-free beam-to-column connections moment-resisting frame cyclic and compression loading tests buckling-restrained knee brace cover tube
A new proof of Honeycomb Conjecture by fractal geometry methods
Tong ZHANG, Kai DING
《机械工程前沿(英文)》 2013年 第8卷 第4期 页码 367-370 doi: 10.1007/s11465-013-0273-7
Based on fractal geometry, we put forward a concise and straightforward method to prove Honeycomb Conjecture—a classical mathematic problem. Hexagon wins the most efficient covering unit in the two- dimensional space, compared with the other two covering units—triangle and square. From this point of view, honeycomb is treated as a hierarchical fractal structure that fully fills the plane. Therefore, the total side length and area are easily calculated and from the results, the covering efficiency of each possible unit is provided quantitatively.
关键词: Honeycomb Conjecture fractal geometry hierarchical fractal structure
WU Hongchun, LIU Pingping, ZHOU Yongqiang, CAO Liangzhi
《能源前沿(英文)》 2007年 第1卷 第2期 页码 158-166 doi: 10.1007/s11708-007-0020-z
关键词: unstructured geometry assembly transmission probability TPM rectangular
Performance assessment of innovative seismic resilient steel knee braced frame
Tony T. Y. YANG,Yuanjie LI
《结构与土木工程前沿(英文)》 2016年 第10卷 第3期 页码 291-302 doi: 10.1007/s11709-016-0340-3
关键词: buckling restrained brace innovative structural system collapse simulation seismic assessment
Siqi LIU, Yanqing NIU, Liping WEN, Yang LIANG, Bokang YAN, Denghui WANG, Shi’en HUI
《能源前沿(英文)》 2021年 第15卷 第1期 页码 91-98 doi: 10.1007/s11708-020-0806-9
降低自行车运动中股四头肌消耗的无动力膝关节外骨骼研究 Article
Ronnapee Chaichaowarat,Jun Kinugawa,Kazuhiro Kosuge
《工程(英文)》 2018年 第4卷 第4期 页码 471-478 doi: 10.1016/j.eng.2018.07.011
自行车是一种环保且具有娱乐性的交通方式。为了减少自行车运动的能量消耗同时不消耗额外的能源,我们提出利用扭力弹簧对膝关节伸展进行支撑。我们开发了一个基于嵌入式扭转弹簧与交叉四杆机构的膝关节外骨骼原型机。在研究过程中,通过分析8 名健康男性参与者以恒定功率骑行测试的数据,对原型机性能进行了评估。记录参与者在200 W 和225 W 带有加速系统的骑行训练机运动时两个腿部股直肌的表面肌电图(EMG)。然后,通过连续小波变换在时间频率上分析这些数据。在相同的骑行速度和腿部节奏下,肌电的中值功率谱频率随骑行负荷的增加而增加。在相同的骑行载荷下,外骨骼机器人可使中值功率谱频率降低。外骨骼机器人不消耗电能,不传递净正机械功,可减轻股四头肌的活动。此项基础研究可应用于骑行辅助可穿戴设备的进一步开发。
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。
Minghou LIU, Yaqing WANG, Dong LIU, Kan XU, Yiliang CHEN
《能源前沿(英文)》 2011年 第5卷 第1期 页码 75-82 doi: 10.1007/s11708-010-0014-0
王敏,张永涛,刘景红,刘毅,黄跃
《中国工程科学》 2009年 第11卷 第11期 页码 79-81
针对短线预制拼装箱梁几何控制过程中制造及安装阶段的误差控制问题,在分析了误差产生原因的基础上,结合苏通大桥B2标的现场实际情况,介绍以几何控制理论为基础,参数敏感性分析为方法,辅以现代误差分析技术和软件开发技术,实现短线法预制拼装的全过程施工数值化管理与控制。
Edge preparation methods for cutting tools: a review
《机械工程前沿(英文)》 2023年 第18卷 第4期 doi: 10.1007/s11465-023-0766-y
关键词: edge preparation method preparation principle cutting edge geometry edge characterization tool performance
郭东明
《中国工程科学》 2011年 第13卷 第10期 页码 47-57
随着高端装备和产品的不断发展,对装备和产品制造的性能要求也越来越多和越来越高,涌现出一大批高性能指标要求的关键零部件,其加工已由以往的单纯几何形状和尺寸精度要求,跃升为以性能要求为主、性能与几何参数一体化的精密加工要求。这些高性能零件多呈精密复杂曲面、超高精度,以及材料超硬、超脆、超黏等难加工特征,其性能受几何、材料等多因素耦合作用,采用传统工艺进行精密加工制造十分困难,存在废品率高、加工效率低,特别是性能指标难以保证等难题。从高端制造装备业的需求出发,提出并阐明了高性能零件的特点、分类以及数字化可控去除加工方式的内涵,在此基础上指出了四类高性能零件精密加工所涉及的关键问题,并着重介绍了这些问题的研究现状、存在的难点和可行的解决方案,为面向高性能要求的性能与几何参数一体化的加工理论、方法和工艺技术体系的建立提供参考,以解决高性能零件的精密制造难题。
关键词: 高性能 性能与几何参数一体化 精密加工 难加工材料 复杂曲面
Lin Yang, Wenpeng Li, Junheng Guo, Wei Li, Baoguo Wang, Minqing Zhang, Jinli Zhang
《化学科学与工程前沿(英文)》 2021年 第15卷 第2期 页码 384-398 doi: 10.1007/s11705-020-1928-7
关键词: jet-flow high shear mixer solid particle dissolution power consumption characteristics CFD Simulation
基于单幅微距图像的布料丝线结构建模 Special Feature on Virtual Reality-Research Articl
Hong-yu WU, Xiao-wu CHEN, Chen-xu ZHANG, Bin ZHOU, Qin-ping ZHAO
《信息与电子工程前沿(英文)》 2019年 第20卷 第9期 页码 1165-1174 doi: 10.1631/FITEE.1800693
关键词: 单幅微距图像;丝线三维几何;布料外观
标题 作者 时间 类型 操作
Biomechanics of knee joint – A review
Bhaskar Kumar MADETI,Srinivasa Rao CHALAMALASETTI,S K Sundara siva rao BOLLA PRAGADA
期刊论文
Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)
Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA
期刊论文
Transmission probability method based on triangle meshes for solving the unstructured geometry neutron
WU Hongchun, LIU Pingping, ZHOU Yongqiang, CAO Liangzhi
期刊论文
Performance assessment of innovative seismic resilient steel knee braced frame
Tony T. Y. YANG,Yuanjie LI
期刊论文
Experimental studies of ash film fractions based on measurement of cenospheres geometry in pulverized
Siqi LIU, Yanqing NIU, Liping WEN, Yang LIANG, Bokang YAN, Denghui WANG, Shi’en HUI
期刊论文
Experimental study of the effects of structured surface geometry on water spray cooling performance in
Minghou LIU, Yaqing WANG, Dong LIU, Kan XU, Yiliang CHEN
期刊论文
Effects of rotor and stator geometry on dissolution process and power consumption in jet-flow high shear
Lin Yang, Wenpeng Li, Junheng Guo, Wei Li, Baoguo Wang, Minqing Zhang, Jinli Zhang
期刊论文