Standing

Abstract

The paper summarizes 12 papers by the authors over the last six years on various aspects of standing. This paper is divided into four sections. The anthropometry section discusses foot dimensions (including volume and footprints) and discusses leg-length discrepancy. The criteria section discusses the usefulness, for standing, of various physiological criteria and of body comfort votes. The floor surfaces section discusses concrete, rubber mats and carpet. The posture section discusses standing postures.     

Building Bridges,Standing Guard

A major challenge facing the ‘white hats’ — those whose job it is to create ands sustain a stable and secure E-commerce environment — is to forge a global strategy to combat global cybercrime. Becasue the nature and extent of crimes directed against E-commerce sites are increasing daily, this task becomes more urgent and more critical.     

Anthropometric Studies on Swedish Industrial Workers when Standing and Sitting

Anthropometry of standing and sitting positions was studied for men and women aged 25—4Q years selected at random from a major Swedish industry. Important ergonomics body dimensions were investigated. The means and S.D. are presented for these measurements as well as correlation coefficients and regression equations for their relationships. The biological implications of differences demonstrated between different body measurements are considered in the discussion. One important observation is that details within the working space should bo correctly adjusted to the individual unloss they disturb an already correct ergonomic design.     

Special Feature: Building EDP Success by Standing on Shoulders

Obtaining quality documentation is one of the most difficult jobs in the analysis, design and development of a data processing system. Most DP systems require three types of documentation before a system becomes operational. These three types are the results of three evolutionary phases in the installation of a given system. Figure 1 depicts the evolutionary phases and defines the three types of documentation required. Actually, there are four phases and four types of documentation in the life of a system. The fourth phase is the System Maintenance Period of an ongoing system, and the fourth type of documentation is the User Reference Documentation.     

基于信誉机制的P2P网络安全技术

本文提出了一种基于信誉机制的P2P网络,以量化的信誉度值来判断节点的合法性;给出了该网络的运行机制及恶意节点的检测和处理方式。     

Biometrics:Standing Throughout Emerging Technologies

Biometrics technologies have been around for quite some time and many have been deployed for different applications all around the world, ranging from small companies' time and attendance systems to access control systems for nuclear facilities. Biometrics offer a reliable solution for the establishment of the distinctiveness of identity based on who an individual is, rather than what he or she knows or carries. Biometric Systems automatically verify a person's identity based on his/her anatomical and behav...     

Underworld的地上世界

许多人认识Underworld,不少是因着当年电影《猜火车（Trainspotting）》中那首大红大紫的《Born Slippy》--上世纪90年代的经典Cult电影,以及汇聚了彼时最当红英国乐队的原声,当然会是最能让人记住的时代icon。     

矿山地压监测系统研究

非煤采矿区经过长期作业后,会形成很多采空区域,这部分区域的安全将对矿井安全造成直接影响。针对非煤采矿区作业特点,提出了一种基于位移传感器的新型地压监测系统方案,该方案以单片机为控制核心,使用直线式位移传感器监测矿井顶部压力变化,通过485总线和光纤将压力信息传送至监控中心,以图表和文字表格方式实时显示压力变化值,经过长时间运行,证实达到预期效果。     

Standing wave type surface acoustic wave atomizer

A new standing wave type surface acoustic wave (SAW) atomizer is proposed and tested. To investigate atomization characteristics, the earlier progressive wave and the proposed standing wave types of atomizer are compared by means of vibration mode, atomization speed, and electrostatic deposition tests. In the case of the vibration mode and atomization speed tests, the standing wave type showed higher standing wave ratio (SWR) and slower atomization speed than the progressive wave type. In the electrostatic deposition test, a liquid sample is atomized by two types of SAW atomizer combined with two different driving modes, namely continuous and intermittent drive. The deposited dry particles are then measured by field-emission type scanning electron microscopy (FE-SEM) and particle sizes are calculated by image processing software. In the results, only the standing wave with continuous drive showed no second peak within size distribution.     

仿人机器人站立多平衡策略控制

设计了全状态反馈参数化控制器用于仿人机器人在站立平衡中应对外界冲击力与持续力. 采用多个机器人模型模仿人类站立平衡中的多个应对策略. 对每个模型, 设计了参数控制器作用于每一个状态误差, 并针对不同的作用力大小、方向和位置优化控制器参数. 应对不同外界作用力展现了该控制器的性能. 通过比较每一个策略处理干扰力的能力, 本文也探索了每个关节在站立平衡中的作用.     

基于激光扫描仪的树干三维重建方法研究

本文介绍了一种利用三维激光扫描仪,对树木枝干进行三维重建的方法.首先利用激光扫描仪获取一系列树木枝干的坐标数据,继而通过筛选这些数据来重建一系列树木枝干的片断模型,最后利用所得到的这些片断模型进行拼合,从而得到完整枝干的三维模型.利用这种方法重建出来的枝干模型是一系列圆柱体经过空间的叠加而构成的.这种三维重建方法所得到的模型可用于树胸高度的测量以及树干锥度和倾斜度的估算等领域,在实际应用中取得了良好的效果.     

基于相位聚焦的驻波声场悬浮与运输方法研究

高频驻波声场中声波入射波与反射波非线性叠加作用下会产生声辐射力,从而实现微小物体的悬浮.使用幅值调制或频率调制改变悬浮位置存在空间上限制,且运输平稳性较差.在换能器阵列形成声场中,使用相位调制可以实现定点聚焦与物体平稳运输.基于超声驻波悬浮原理,详细分析了单驻波、平面驻波、空间驻波声场声压、相位分布情况,并基于聚焦原理使用相位调制的方法实现对声场的定点聚焦、聚苯乙烯小球悬浮与运输.结果表明：单驻波声场可通过双向相位调制方法实现小球稳定运输;在横向相位差为π的情况下使用PLL多时钟信号可实现多方向、不同速度的同时运输;空间阵列驻波声场通过定点聚焦声压提高了83%,且通过连续改变焦点位置实现了小球直线运输.     

Solid Geometry Processing on Deconstructed Domains

Many tasks in geometry processing are modelled as variational problems solved numerically using the finite element method. For solid shapes, this requires a volumetric discretization, such as a boundary conforming tetrahedral mesh. Unfortunately, tetrahedral meshing remains an open challenge and existing methods either struggle to conform to complex boundary surfaces or require manual intervention to prevent failure. Rather than create a single volumetric mesh for the entire shape, we advocate for solid geometry processing on deconstructed domains, where a large and complex shape is composed of overlapping solid subdomains. As each smaller and simpler part is now easier to tetrahedralize, the question becomes how to account for overlaps during problem modelling and how to couple solutions on each subdomain together algebraically. We explore how and why previous coupling methods fail, and propose a method that couples solid domains only along their boundary surfaces. We demonstrate the superiority of this method through empirical convergence tests and qualitative applications to solid geometry processing on a variety of popular second‐order and fourth‐order partial differential equations.     

基于样图的木材体纹理绘制方法

传统的体纹理绘制方法采用函数模型定义体纹理空间的颜色,模拟不同的纹理特征需要反复调整与测试相关参数,且在多数情况下不能获得令人满意的结果.以木材体纹理绘制为例,提出了一种基于样图的体纹理绘制新方法.该方法针对木材纹理的结构特点构造样图空间与体纹理空间的几何映射关系,采用木纹样图的像素纹理值定义体纹理空间的颜色.实验结果表明,绘制的纹理不仅较好地模拟了木纹样图中的纹理特征,而且在物体各表面交界处保持连续.由于纹理样图可根据用户需要任意选取,基于样图的体纹理绘制方法显著提高了计算机生成木纹的真实感与多样性.