搜索结果: 16-30 共查到“知识库 生物力学”相关记录131条 . 查询时间(0.735 秒)
自振荡凝胶的动力学模型及可控性分析
智能凝胶 BZ反应 非线性振荡 周期性调控
2014/2/28
自振荡凝胶是一类在Belousov-Zhabotinsky化学反应（BZ反应）驱动下能够产生周期性收缩和膨胀大变形的智能软材料，简称为BZ凝胶，在微型激励器、传感器、药物释放、仿生材料等领域有着广泛的应用前景。基于BZ化学反应的Oregonator模型以及凝胶变形的力平衡方程，建立了由二阶微分方程表示的BZ凝胶的简化动力学模型，并通过对BZ凝胶的振荡动力学模型的分析，发现其在动力学相轨迹空间内呈现...
舟骨骨折的螺钉居中固定：生物力学试验
舟骨 骨折固定术 内 生物力学
2018/6/21
目的：对于斜形不稳定的舟骨骨折，通过生物力学试验评价舟骨螺钉的位置居中与否对其固定强度的影响。方法：将32例外形、材质相同的Sawbone舟骨分为4组，每组8例，模拟腰部骨折，用螺钉固定，分组依据骨折的水平（远、近）及螺钉的位置（居中、不居中）。对其中的1例Sawbone舟骨进行CT扫描，流量数据导入术前设计与手术模拟软件（VxWork 4.0）， 建立舟骨的中央区，同时在软件中设计骨折模拟平面、...
人体下肢有限元模型构建及着袜舒适性分析
人体下肢 有限元模型构建 数值分析 着袜舒适性
2014/7/18
选择人体下肢为研究对象，以袜对人体下肢的压力舒适性为研究目标，采用CT图像建模法建立人体下肢小
腿部分的模型，选择相应骨骼肌组织的生物力学模型建立本构关系，建立骨肌生物组织有限元模型，以此分
析着袜对人体下肢的压力分布变化状态的量化指标和具体形态，为着袜压感舒适性的研究提供基础数据.
肠道是人体主要的消化吸收器官,由于其结构狭窄曲折表面结构复杂,内窥镜诊断时会产生组织损伤、胶囊滞留等并发症. 由此激发起肠道与内窥镜的摩擦特性研究,该研究对解决这些并发症以及开发无损诊断内窥镜具有举足轻重的作用. 本文概括介绍了内窥镜的种类,综述了胶囊式内窥镜与肠道、微机器人与肠道的摩擦问题,内容主要集中在两个方面:(1) 胶囊式内窥镜减摩研究,包括摩擦特性研究方法、胶囊结构与摩擦阻力的关系、摩擦...
在热传导分析中,当热流与温度梯度存在时间延迟时,需采用非傅立叶热传导模型进行分析。生物组织具有较强的热松弛时间系数,承受激光、微波及烧烫等作用时,其呈现出较强的非傅立叶行为。本文对脉冲热源作用下生物组织的非傅立叶热传导进行研究,针对强脉冲引起的温度场在空间域的高梯度变化、波阵面的间断行为以及通用传统时域数值方法会带来虚假数值振荡的特点,提出采用所发展的时域间断Galerkin有限元法(DGFEM)...
Ageing effects in single particle trajectory averages
Ageing effects single particle trajectory averages Biological Physics
2012/5/3
We study time averages of single particle trajectories in scale free anomalous diffusion processes, in which the measurement starts at some time t_a>0 after initiation of the process at the time origi...
DNA Self-Assembly and Computation Studied with a Coarse-grained Dynamic Bonded Model
DNA Self-Assembly Computation Studied Coarse-grained Dynamic Bonded Model Biological Physics
2012/5/3
We utilize a coarse-grained directional dynamic bonding DNA model [C. Svaneborg, Comp. Phys. Comm. (In Press DOI:10.1016/j.cpc.2012.03.005)] to study DNA self-assembly and DNA computation. In our DNA ...
A theorem for the thermodynamics of chemical reaction networks at steady state
thermodynamics of chemical reaction networks steady state Biological Physics
2012/5/3
In this article the Gordan theorem is applied to the thermodynamics of a chemical reaction network at steady state. From a theoretical viewpoint it states that the exclusion (presence) of closed react...
Macroscopic loop formation in circular DNA denaturation
Macroscopic loop formation circular DNA denaturation Biomolecules Statistical Mechanics
2012/5/3
The statistical mechanics of DNA denaturation under fixed linking number is qualitatively different from that of the unconstrained DNA. Quantitatively different melting scenarios are reached from two ...
Recent advances in theoretical models of respiratory mechanics
Respiratory mechanics Biomechanics Gas exchange
2012/2/24
As an important branch of biomedical engineering, respiratory mechanics helps to understand the physiology of the respiratory system and provides fundamental data for developing such clinical technolo...
Stochastic kinetic models: Dynamic independence, modularity and graphs
Stochastic kinetic models Dynamic independence modularity graphs
2010/11/16
The dynamic properties and independence structure of stochastic kinetic models (SKMs) are analyzed. An SKM is a highly multivariate jump process used to model chemical reaction networks, particularly ...
A Verhulst-Like Two-Species Population Dynamics Model
Verhulst-Like Two-Species Population Dynamics Model
2010/11/15
The study of a two-species dynamics population model, which includes intraspecific competition to the Lotka-Volterra equation, is presented. Despite being simple, this model presents a very rich behav...
Using Monte-Carlo simulations, we deconvolved the sliding and hopping kinetics of GFP-LacI proteins on elongated DNA from their experimentally observed seconds-long diffusion trajectories. Our simulat...
Scaling Function, Universality and Analytical Solutions of Generalized One-Species Population Dynamics Models
Scaling Function Universality Analytical Solutions Generalized One-Species Population Dynamics Models
2010/11/16
We consider several one-species population dynamics model with finite and infinite carrying capacity, time dependent growth and effort rates and solve them analytically. We show that defining suitable...
A large repertoire of spatiotemporal activity patterns in the brain is the basis for adaptive behaviour. Understanding the mechanism by which the brain's hundred billion neurons and hundred trillion ...