期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
壳体建筑微结构仿生的桁膜复合结构原型研究 被引量:1
1
作者 孙明宇 《建筑与文化》 2021年第2期57-59,共3页
自然界广泛存在的桁膜复合结构是结构仿生研究中的重要发现之一,主要表现为在结构性能驱动下的膜结构与桁架结构的杂交。首先,文章介绍自然界中存在的桁膜复合结构形态以及与之相关的研究。进而,从结构性能及构成角度,分析桁膜复合结构... 自然界广泛存在的桁膜复合结构是结构仿生研究中的重要发现之一,主要表现为在结构性能驱动下的膜结构与桁架结构的杂交。首先,文章介绍自然界中存在的桁膜复合结构形态以及与之相关的研究。进而,从结构性能及构成角度,分析桁膜复合结构原理,及不同先锋建筑师展开的结构原型研究。最后,从性能化装饰的角度,讨论以桁膜结构原型为基础拓展出的结构、机械与美学一体化系统。未来以算法技术、新材料与智能建造技术为支撑的建筑工程中,以桁膜复合结构为仿生原型的壳体建筑研究与工程应用将具有广阔前景。 展开更多
关键词 壳体建筑 微结构仿 结构性能 桁膜复合 材料拓扑 计算生形
下载PDF
空间与计算--数字技术与建筑空间的交织演变 被引量:2
2
作者 孙明宇 《城市建筑》 2021年第19期120-122,共3页
随着计算机算力的指数级快速进化,计算机技术对各个领域的冲击都将是不可逆的。计算机已经从过去辅助设计转向为主动参与建筑空间形态设计,空间形态从可描述的欧几里得几何发展为计算机可描述的高级几何。本文从数字技术与建筑空间的交... 随着计算机算力的指数级快速进化,计算机技术对各个领域的冲击都将是不可逆的。计算机已经从过去辅助设计转向为主动参与建筑空间形态设计,空间形态从可描述的欧几里得几何发展为计算机可描述的高级几何。本文从数字技术与建筑空间的交织,以算法思维为核心的建筑设计流程,以数字流为核心的数字化建筑三个方面,结合具体案例进行分析。未来建筑将面临更加科学化的设计问题,鼓励从建筑空间的本质问题进行积极突破。 展开更多
关键词 建筑空间 数字技术 计算生形 算法思维
下载PDF
Deformation and stress distribution of the human foot after plantar ligaments release:A cadaveric study and finite element analysis 被引量:8
3
作者 LIANG Jun YANG YunFeng +2 位作者 YU GuangRong NIU WenXin WANG YuBin 《Science China(Life Sciences)》 SCIE CAS 2011年第3期267-271,共5页
The majority of foot deformities are related to arch collapse or instability,especially the longitudinal arch.Although the relationship between the plantar fascia and arch height has been previously investigated,the s... The majority of foot deformities are related to arch collapse or instability,especially the longitudinal arch.Although the relationship between the plantar fascia and arch height has been previously investigated,the stress distribution remains unclear.The aim of this study was to explore the role of the plantar ligaments in foot arch biomechanics.We constructed a geometrical detailed three-dimensional (3-D) finite element (FE) model of the human foot and ankle from computer tomography images.The model comprised the majority of joints in the foot as well as bone segments,major ligaments,and plantar soft tissue.Release of the plantar fascia and other ligaments was simulated to evaluate the corresponding biomechanical effects on load distribution of the bony and ligamentous structures.These intrinsic ligaments of the foot arch were sectioned to simulate different pathologic situations of injury to the plantar ligaments,and to explore bone segment displacement and stress distribution.The validity of the 3-D FE model was verified by comparing results with experimentally measured data via the displacement and von Mise stress of each bone segment.Plantar fascia release decreased arch height,but did not cause total collapse of the foot arch.The longitudinal foot arch was lost when all the four major plantar ligaments were sectioned simultaneously.Plantar fascia release was compromised by increased strain applied to the plantar ligaments and intensified stress in the midfoot and metatarsal bones.Load redistribution among the centralized metatarsal bones and focal stress relief at the calcaneal insertion were predicted.The 3-D FE model indicated that plantar fascia release may provide relief of focal stress and associated heel pain.However,these operative procedures may pose a risk to arch stability and clinically may produce dorsolateral midfoot pain.The initial strategy for treating plantar fasciitis should be non-operative. 展开更多
关键词 BIOMECHANICS finite element analysis foot arch LIGAMENT STRESS
原文传递
On the complexity of average path length for biological networks and patterns
4
作者 Waqar Asif Hassaan Khaliq Qureshi +1 位作者 Adnan Iqbal Muttukrishnan Rajarajan 《International Journal of Biomathematics》 2014年第4期51-61,共11页
Path length calculation is a frequent requirement in studies related to graph theoretic problems such as genetics. Standard method to calculate average path length (APL) of a graph requires traversing all nodes in t... Path length calculation is a frequent requirement in studies related to graph theoretic problems such as genetics. Standard method to calculate average path length (APL) of a graph requires traversing all nodes in the graph repeatedly, which is computationally expensive for graphs containing large number of nodes. We propose a novel method to calculate APL for graphs commonly required in the studies of genetics. The proposed method is computationally less expensive and less time-consuming compared to standard method. 展开更多
关键词 REDUCTIONISM average path length protein protein interaction.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部