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A feasibility study on the design and walking operation of a biped locomotor via dynamic simulation
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《机械工程前沿(英文)》 2016年 第11卷 第2期 页码 144-158 doi: 10.1007/s11465-016-0391-0
A feasibility study on the mechanical design and walking operation of a Cassino biped locomotor is presented in this paper. The biped locomotor consists of two identical 3 degrees-of-freedom tripod leg mechanisms with a parallel manipulator architecture. Planning of the biped walking gait is performed by coordinating the motions of the two leg mechanisms and waist. A three-dimensional model is elaborated in SolidWorks® environment in order to characterize a feasible mechanical design. Dynamic simulation is carried out in MSC.ADAMS® environment with the aims of characterizing and evaluating the dynamic walking performance of the proposed design. Simulation results show that the proposed biped locomotor with proper input motions of linear actuators performs practical and feasible walking on flat surfaces with limited actuation and reaction forces between its feet and the ground. A preliminary prototype of the biped locomotor is built for the purpose of evaluating the operation performance of the biped walking gait of the proposed locomotor.
关键词: feasibility study biped locomotor biped walking mechanical design dynamic simulation tripod leg mechanism 3-UPU parallel manipulator
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《医学前沿(英文)》 2015年 第9卷 第3期 页码 392-400 doi: 10.1007/s11684-015-0397-8
Ambient air pollution in China has worsened following dramatic increases in industrialization, automobile use and energy consumption. Particularly bothersome is the increase in the PM2.5 fraction of pollutants. This fraction has been associated with increasing rates of cardio-respiratory disease in China and elsewhere. Ambient pollutant levels have been described in many of China’s cities and are comparable to previous levels in southern California. Lung cancer mortality in China has increased since the 1970s and has been higher in men and in urban areas, the exact explanation for which has not been determined. The estimation of individual risk for Chinese citizens living in areas of air pollution will require further research. Occupational cohort and case-control designs each have unique attributes that could make them helpful to use in this setting. Other important future research considerations include detailed exposure assessment and the possible use of biomarkers as a means to better understand and manage the threat posed by air pollution in China.
关键词: air pollution PM2.5 lung disease study design epidemiology
Parametric study on damage control design of SMA dampers in frame-typed steel piers
Xiaoqun LUO, Hanbin GE, Tsutomu USAMI,
《结构与土木工程前沿(英文)》 2009年 第3卷 第4期 页码 384-394 doi: 10.1007/s11709-009-0065-7
关键词: damage control design shape memory alloy parameter study displacement-based verification strain-based verification time history analysis
Basic model study on efficiency evaluation in collaborative design work process
XIE Qiu, YANG Yu, LI Xiaoli, ZHAO Ningyu
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 344-349 doi: 10.1007/s11465-007-0060-4
关键词: function system work evaluation process efficiency evaluation design work
《农业科学与工程前沿(英文)》 2022年 第9卷 第2期 页码 295-308 doi: 10.15302/J-FASE-2021434
Since the Green Revolution cropping systems have been progressively homogenized and intensified with increasing rates of inputs such as fertilizers, pesticides and water. This has resulted in higher crop productivity but also a high environmental burden due to increased pollution and water depletion. To identify opportunities for increasing the productivity and reducing the environmental impact of cropping systems, it is crucial to assess the associated trade-offs. The paper presents a model-based analysis of how 30 different crop rotations practiced in the North China Plain could be combined at the regional level to overcome trade-offs between indicators of economic, food security, and environmental performance. The model uses evolutionary multi-objective optimization to maximize revenues, livestock products, dietary and vitamin C yield, and to minimize the decline of the groundwater table. The modeling revealed substantial trade-offs between objectives of maximizing productivity and profitability versus minimizing ground water decline, and between production of livestock products and vitamin C yield. Six strategies each defining a specific combination of cropping systems and contributing to different extents to the various objectives were identified. Implementation of these six strategies could be used to find opportunities to mitigate the trade-offs between objectives. It was concluded that a holistic analysis of the potential of a diversity cropping systems at a regional level is needed to find integrative solutions for challenges due to conflicting objectives for food production, economic viability and environmental protection.
关键词: crop rotation / food security / multi-objective optimization / water use
Scale study of sites and pavilions for World Expo 2010
ZHOU Zhuoyan, CHEN Yi
《结构与土木工程前沿(英文)》 2008年 第2卷 第1期 页码 102-106 doi: 10.1007/s11709-008-0012-z
关键词: pavilion study number appropriate design
Sustainable Supply Model Design of Public Rental Housing —Case Study of Chongqing
Xiao Li,Xiang Gu,Yue Teng,Pan Li
《工程管理前沿(英文)》 2014年 第1卷 第4期 页码 410-416 doi: 10.15302/J-FEM-2014050
关键词: public rental housing sustainability supply model filtering theory
赵燕伟
《中国工程科学》 2001年 第3卷 第5期 页码 67-71
文章在总结现有智能化概念设计思维规律的基础上,提出基于可拓方法的机械产品智能化概念设计的研究内容、特点、流程与方法。围绕智能化概念设计的功能表达、功能分解与综合、功能推理与决策,重点研究功能-原理-布局-结构的可拓化概念设计方法和计算机模拟人类解决问题的辩证思维过程。文中给出可拓方法在加工中心刀库概念设计中的应用实例。该方法对于解决目前智能化概念设计理论研究与工程实现中的瓶颈问题,具有重要意义。
Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW
《工程管理前沿(英文)》 2017年 第4卷 第3期 页码 338-347 doi: 10.15302/J-FEM-2017032
关键词: supply chain network stochastic demand sampling average approximation Bayesian bootstrap Latin hypercube sampling
《环境科学与工程前沿(英文)》 2022年 第16卷 第9期 doi: 10.1007/s11783-022-1550-7
• A fine fibre (40–60 nm diameter) interlayer (~1 µm thickness) was electrospun.
关键词: Forward osmosis Electro-spinning Interfacial polymerisation Fouling Polyvinylidene fluoride
Mehrdad MAJIDI, Hamid JAVADI, Moein MANBACHI
《能源前沿(英文)》 2014年 第8卷 第1期 页码 90-100 doi: 10.1007/s11708-013-0286-2
关键词: comsol multiphysics EMTP-RV ferrite ring gas insulated substations (GIS) transient over-voltage insulation coordination
徐亮,张和平,杨昀,朱五八
《中国工程科学》 2004年 第6卷 第1期 页码 64-67
火灾场景的设置是性能化设计的关键步骤,重点介绍了常用的火灾增长曲线设计方法,并且以高架仓库火灾设计为例,说明了如何灵活运用火灾设计方法。
A model study on affordable steel residential housing in China
Xin CHENG, Xianzhong ZHAO, Yiyi CHEN, Zhenyu LI
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 288-296 doi: 10.1007/s11709-012-0171-9
关键词: affordable housing energy-saving duplex design pure steel frame economic evaluation
谢世楞
《中国工程科学》 2000年 第2卷 第11期 页码 35-39
介绍半圆形防波堤和导堤结构在天津港和长江口深水航道治理工程中的设计应用情况,并对作用在半圆形防波堤上的波浪力计算方法研究以及半圆形防波堤的构造等发展概况作了论述。
标题 作者 时间 类型 操作
A feasibility study on the design and walking operation of a biped locomotor via dynamic simulation
null
期刊论文
Ambient air pollution and lung disease in China: health effects, study design approaches and future research
null
期刊论文
Parametric study on damage control design of SMA dampers in frame-typed steel piers
Xiaoqun LUO, Hanbin GE, Tsutomu USAMI,
期刊论文
Basic model study on efficiency evaluation in collaborative design work process
XIE Qiu, YANG Yu, LI Xiaoli, ZHAO Ningyu
期刊论文
TRADE-OFFS IN THE DESIGN OF SUSTAINABLE CROPPING SYSTEMS AT A REGIONAL LEVEL: A CASE STUDY ON THE NORTH
期刊论文
Sustainable Supply Model Design of Public Rental Housing —Case Study of Chongqing
Xiao Li,Xiang Gu,Yue Teng,Pan Li
期刊论文
A case study on sample average approximation method for stochastic supply chain network design problem
Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW
期刊论文
Design of nanofibre interlayer supported forward osmosis composite membranes and its evaluation in foulingstudy with cleaning
期刊论文
A novel algorithm for frequency dependent modeling of ferrite ring and its optimum design to study VFTO
Mehrdad MAJIDI, Hamid JAVADI, Moein MANBACHI
期刊论文
A model study on affordable steel residential housing in China
Xin CHENG, Xianzhong ZHAO, Yiyi CHEN, Zhenyu LI
期刊论文