不同国家在现代建筑运动中的角色差异分析

摘要代表现代建筑运动开端的工艺美术运动产生于英国,可是现代主义建筑运动却主要产生于欧洲另外三个国家——德国、苏联和荷兰。该文通过对当时的社会、历史、文化和技术等方面进行分析,探索现代建筑运动的先锋地位从英国转移到德国、苏联和荷兰的原因,从而总结出现代建筑运动和现代主义建筑运动在这四个国家产生与发展的差异。     

基于蒙特卡罗算法煤矿井下人员定位研究

对比分析几种常用的无线传感器网络节点定位方法.针对煤矿井下节点移动性可能导致普通的定位算法变得不精确,提出了蒙特卡罗定位(Monte Carlo Localization)算法.该方法利用物体运动的连续性,通过选取合适的模型完成移动节点位置预测与定位.经仿真验证在低密度锚节点环境下,蒙特卡罗方法位置估计误差明显低于其它方法,提高了移动节点定位算法的准确性.     

基于动作图像特征的人体运动行为挖掘算法

研究人体行为图像特征识别问题,在人体动作图像中存在大量的和真实行为无关的掩饰动作特征,掩饰动作的存在会大大干扰人体真实行为特征,造成行为真实特征关联的减弱,形成干扰.传统的关联特征挖掘方法在关联干扰的情况下,很难建立准确的行为特征对应空间,使得关联性发生混乱,造成行为特征挖掘错误.提出了一种采用动作特征人体运行行为挖掘算法.利用黄金分割方法,计算动作特征的权值比重,从而删除冗余特征,为人体行为挖掘提供准确的数据基础.利用非线性分类函数,对人体行为特征进行分类,从而实现人体运动行为的挖掘.实验结果表明,利用改进算法能够有效提高人体运动行为识别的准确性,从而有效地对人体运动行为进行有效识别.     

一种导弹复合告警装置的设计分析与运动仿真

面对现代战争中的导弹精确打击,地面高价值作战平台的生存防护日益成为各国研究的热点.基于此提出一种将红外告警与紫外告警相复合的伞新的告警模式.模式能够在保证探测精度、探测距离的前提下大大降低系统虚警率,提高平台的战场生存能力.参考近期国外的告警装备,确定了复合告警系统的结构设计方案.在方法上采用了 UG三维建模、三维运动/动力分析以及MSC有限元分析等手段.得到了与实际相符合的结果,片为系统的进一步优化提供了依据.通过对仿真结果的分析处理,得到了系统可行性结论,为下一步样机的试制奠定了基础.     

Nursing staff's perception of changes in patient transfer habits after a course – a phenomenological-hermeneutic study

The objective of the study was to illuminate nursing staff's perception of changes after a course in patient transfer. The learning process took the form of self-experience focusing on the manner of supporting the patient to move independently. A total of 20 participants, who had answered a previously administered questionnaire, were chosen for interviews. The themes concerned the meaning of changing transfer habits. A phenomenological-hermeneutic analysis method showed that changes focused on the patient's body, the staff member's own body or cooperation with the patient. Awareness of one's own body and confidence in one's own ability seem to indicate differences in the manner of supporting the patient to move. The changes in transfer habits varied in content and meaning from person to person, depending on the focus during the transfer. These findings can contribute to an understanding of how change takes place after an educational intervention.     

An interactive 3D movement path manipulation method in an augmented reality environment

In this paper, we evaluate a path editing method using a tangible user interface to generate and manipulate the movement path of a 3D object in an Augmented Reality (AR) scene. To generate the movement path, each translation point of a real 3D manipulation prop is examined to determine which point should be used as a control point for the path. Interpolation using splines is then used to reconstruct the path with a smooth line. A dynamic score-based selection method is also used to effectively select small and dense control points of the path. In an experimental evaluation, our method took the same time and generated a similar amount of errors as a more traditional approach, however the number of control points needed was significantly reduced. For control manipulation, the task completion time was quicker and there was less hand movement needed. Our method can be applied to drawing or curve editing methods in AR educational, gaming, and simulation applications.     

一种机器人轨迹规划的新方法

为了使机器人具有良好的运动特性,本文从机器人轨迹规划出发,采用了Ｃｌｏｔｈｏｉｄ 曲线生成机器人各关节运动轨迹;该方法利用Ｃｌｏｔｈｏｉｄ 曲线的Ｃ２ 连续性,优化机器人各关节的运动性能,最终改善了机器人的运动特性。     

高速凸轮机构输出端运动规律的确定

高速凸轮机构在机械产品中发挥的作用日趋明显。这里并以弹性理论为基础,建立了高速凸轮机构的动力学模型,分析了高速凸轮机构动力学模型的运动方程式,并通过正弦加速度运动规律得到了凸轮机构输出端的动态响应,找到了确定凸轮机构输出端运动规律的方法,为凸轮廓线的设计奠定了基础。     

基于虚拟样机技术的液压冲击器改进设计

传统的液压破碎锤冲击机构包含了换向阀和主缸体,由于两者在工作中受损情况不同,更换设备时便造成了不必要的浪费,故此以虚拟样机技术为设计理念,通过catia软件,建立改进后的破碎锤液压冲击器的虚拟样机模型,使做到换向阀合主缸体两者分离,并运用catia的动态模拟功能对冲击器进行运动学仿真分析。虚拟样机技术可以减少实物模型和样机的投入,缩短产品的开发周期,有利于实现产品的最优设计或变形产品设计。     

Modeling of Sludge Behavior in a Steam Dryer

Steam dryers are in widespread use for sewage sludge treatment. The effectiveness of the steam dryer could be improved by increasing the drying rate, which is influenced by the movement of the sludge in the dryer. Therefore, it is necessary to understand the movement of sludge and water evaporation in the dryer. In this study, tracers were used to elucidate the behavior of sludge in the dryer. The experiment confirmed that sludge did not simply flow in one direction; instead, part of the sludge flowed in the reverse direction (back-mixing). A tanks-in-series model analysis was performed to analyze the back-mixing phenomenon. This analysis provided insight into the behavior of sludge in the dryer, and the drying rate of each segment was determined.