Comparison of Three‐Dimensional Korean Male Anthropometric Data with Modeling Data Generated by Digital Human Models

The purpose of this study was first to extract the anthropometric data of typical Korean male adults, based on the three‐dimensional anthropometric data measured through the Size Korea project. The data were then analyzed to identify the differences in the anthropometric characteristics between typical Koreans and 3D Korean mannequinmannequins generated by digital human models. Revision equations were then suggested to improve the inaccuracy of digital human models. Typical Korean adults subject to the 3D body scan data were selected by factor analysis with respect to the 5th, 50th, and 95th percentiles. Comparisons of anthropometric differences included the differences of the height and length variables in the vertical direction and the breadth, depth, and circumference variables in the horizontal direction. These comparisons demonstrated the differences in the anthropometric characteristics between typical Koreans and Korean mannequins based on differences in body shape and proportions between Korean and Western populations. Typical Koreans have shorter legs and longer torso than those of such mannequins generated from their own modeling algorithms, and the body shape of Koreans is more of an inverted triangular shape compared to the models. Although 3D digital human models are required to be modified to appropriately reflect the Asian body shape, modification of the modeling algoritms is not available to the public. The revision equations that convert the Korean modeling data of RAMSIS and Human in CATIA into typical Korean anthropometric data were instead suggested by regression analysis. It is expected that the proposed revision equations will help the designer evaluate design alternatives and improve the suitability of ergonomic evaluation for Korean customers. © 2012 Wiley Periodicals, Inc.     

Multi-Wavelength vs. Binary Code Pattern Unwrapping in Fringe Projection Method

Phase extraction, phase unwrapping and phase to height conversion are consecutive steps within the fringe projection method for reconstruction of 3D objects. The procedure of determining discontinuities on the wrapped phase, resolving them and achieving the unwrapped phase is called phase unwrapping. A software system was developed that provides the ability to create many kinds of patterns with a verity of desirable properties suitable for different demands in fringe projection systems. In our previous work, an experimental study was reported based on a multi-wavelength unwrapping approach. In the following work, we implemented a new method called binary code pattern unwrapping that is based on time analysis. A comparison of the two unwrapping approaches in terms of resolution, quality, noise, depth accuracy, and computational cost is provided.     

试谈云储存在数字化图书馆中的实践应用

在数字化图书馆的发展建设过程中,云储存网络服务技术在当前受到越来越多工程技术人员的关注与支持。云储存服务平台通过将多种网络技术与服务有机结合,对数字图书馆中的知识资源进行整合,从而实现数字图书馆的创新发展。通过论述在数字化图书馆中云储存的实践应用状况,分析提高图书馆服务水平的技术方法,以切实推动数字化图书馆的发展进程。     

一种32位浮点型处理器的励磁控制器设计

针对同步发电机励磁控制系统在控制精度和控制稳定性方面存在的不足,通过对国内外励磁控制系统发展状况的分析,提出了一种基于32位浮点型处理器的数字式励磁控制系统.该系统通过将先进的交流采样算法和DSP的优异性能相结合,实现了励磁控制器的深度数字化;通过对同步发电机系统关键模拟量的采集与计算,得出适用于当前工况下触发脉冲角度α.试验验证了该设计能很好地解决发电机励磁控制系统中的稳定性问题.     

激光遥感图像高速滤波器算法的FPGA实现

针对激光遥感信号高速高精度的要求,利用FPGA的多任务、高速并行性设计系统进行滤波。考虑到激光光电传感器设计的滤波器会有很大的信号衰减,且具有精度要求高的特点,提出了基于 FPGA内部基本逻辑单元、乘法器、存储器,经过乘法分解和时序设计,实现具有可移植性的图像高速分辨的方法。系统采用FPGA设计平台,并用Verilog语言设计程序。试验结果验证,该滤波器对激光遥感信号具有高速、精确滤波功能,同时表明利用低端FPGA设计激光滤波器必将成为未来发展趋势。     

转炉用快速烧结镁r质投补料

根据转炉大面耐火材料的使用条件 ,研究了影响沥青结合及树脂结合镁质投补料使用性能的主要因素。结果表明 ,控制配入合适溶剂的沥青或树脂的加入量 ,掺加少量外加剂 ,可获得性能良好的修补料。二者相比 ,沥青结合镁质投补料的烧结时间较长 ,容易出现凹坑 ;树脂结合投补料与砖体间的粘结性比沥青的稍差 ,容易出现翘曲。     

数字化微格教学系统在师范生培养过程中的应用研究

师范生的培养效果如何关乎到未来教师的教学能力,本文通过对当前我国师范生培养现状的分析,探讨如何应用数字化微格教学系统培养师范生的教学能力。     

数字环境中的机构知识库研究略述

机构知识库（Institutional Repository,简称IR）,是伴随着开放获取运动出现的一个新概念,是数字学术环境中的一种资源存储形式和服务方式。综合国内外学者对IR的知识含义、特征、作用与意义的概述,以及国内外研究现状和IR发展中存在的问题,分析其与开放获取和数字图书馆的关系。     

量块快速检测仪的使用保养及常见故障处理概述

LK型系列量块快速检测仪是一种新型量块测量仪器。该仪器成功地将传感器应用于精密量块检测上,系统稳定、可靠,测量的重复性好,具有多种智能功能,从而提高了量块检测的精度和效率,减轻了检测人员的劳动强度,用户可以从数字显示屏读取测量数据,也可以利用仪器配置的标准通讯接口与计算机连接,对测试结果进行数据处理,从而更为有效地保证了测量数据的可靠性。