A hybrid point cloud alignment method combining particle swarm optimization and iterative closest point method

3D quality inspection is widely applied in many industrial fields including mould design, automotive and blade manufacturing, etc. A commonly used method is to obtain the point cloud of the inspected object and make a comparison between the point cloud and the corresponding CAD model or template. Thus, it is important to align the point cloud with the template first and foremost. Moreover, for the purpose of automatization of quality inspection, this alignment process is expected to be completed without manual interference. In this paper, we propose to combine the particle swarm optimization （PSO） with iterative closest point （ICP） algorithm to achieve the automated point cloud alignment. The combination of the two algorithms can achieve a balance between the alignment speed and accuracy, and avoid the local optimal caused by bad initial position of the point cloud.     

一种基于八叉树的3D点云数据无损压缩方法

本文介绍了一种3D点云数据几阿压缩的新算法,这种算法可视为“无损”压缩,它较好地保持了原有数据的特征。这种算法既可用于形体体内点又可用于表面点,是基于八叉村空间分解,通过占有的八叉树单元格对点云编码,根据失真率的限制生成八叉树,本文采用了行程编码技术（Run—Length Encoding）来压缩八叉树节点。     

交互式课堂教学活动及其在计算机英语教学中的应用

新时期的计算机英语教学要求将传统的课堂教学模式转变为以学生为中心、学生为主体和教师为主导的教学模式。交互式教学模式旨在克服现有课堂教学组织的缺陷,帮助教师创造有利于计算机英语教学的课堂环境,使计算机英语在学生的学业和职业发展中发挥更大的作用。本文阐述了如何有效地将交互式课堂活动应用于计算机英语课堂教学,探讨了如何激发和提高学生学习兴趣的方法,以提高计算机英语教学的效率,从而为计算机英语教学构建更为理想的教学模式。     

基于云计算的高校资源整合研究

针对当前高校资源所面临的现状和问题,构建了一个五层的云计算整合模型。利用该模型能够实现资源共享、降低硬件和软件投入成本,简化资源管理的目的。     

逆向工程三维点云数据后处理与模型的重建

逆向工程中获得的测量数据一般比较大,后处理部分的主要任务在于如何通过离散的三维点云数据来建立实用化的CAD模型,本文详细介绍了三维点云数据后处理流程以及CAD模型的重建过程。     

云计算辅助教学CCAI支撑的协作学习设计

基于教育技术视角,简述了“云计算辅助教学”CCAI的相关概念,分析了云计算及典型云平台的基本现状,并结合Google App Engine和Windows Live典型云平台,讨论了CCAI协作学习的设计过程．包括功能模块与组件选取、组织教学资源、设计协作学习活动、组件的个性化自主扩充等。     

三维激光扫描系统的应用研究

本文就三维激光扫描成像系统的原理和发展趋势做了简要的叙述,以工程应用实例对三维激光扫描成像系统的工作流程和三维建模做了详细的说明,并对三维激光扫描系统采集的点云数据处理的方法和手段进行了研究。     

Design for Narrative Change. A Pedagogical Model for Interactive Digital Narratives

Narratives mirror shared interpretations of the world. Still, dominant narratives prevail, pushing non-hegemonic narratives in the corner. A change in the creation, interaction and distribution of narratives can support the design of counter-narratives able to feed social change. Interactive Digital Narrative (IDN) can be considered an emerging experimental context in which designers, researchers and practitioners from various domains operate to develop story-based content addressing relevant social or societal issues. The IDN social constructivist role in encouraging or influencing individuals and collectivities towards social change is a relevant design issue especially from an educational perspective. Specifically, it features methodologies and praxis not yet systematised, in need of exploration and formalisation. Recognising the contribution of an approach combining transdisciplinary methods and tools, the article presents a pedagogical model for designing IDNs as complex interactive systems able to impact culture and society based on empirical study from a design course in the higher education context. Composed of theoretical and operational frameworks, the pedagogical model orients the multilayered design process for building engaging, interactive narrative artefacts systematising and operationalising knowledge from the domains of Communication for Social Change, storytelling and IDN in an iterative design process.     

云服务定价模型与动态价格效应函数

云服务的合理定价在一定程度上影响服务预订的协商速度。针对已有的服务预订协商机制中服务定价模型（采用随机取值的方式）和价格效应函数不能完全真实地反映人的心理活动的情况,笔者建立了针对云服务提供方和消费方的服务定价模型和动态价格效应函数。通过构建基于代理的云计算仿真平台对提出的模型进行验证,证实了在云服务预定协商机制中运用该模型和效应函数可以产生较快的协商速度,并取得较高的效应值。     

论互联网时代零售连锁企业“云商”模式的发展趋势

文章以“苏宁电器”转型成为“苏宁云商”为背景,阐述了在互联网时代,零售连锁企业传统经营模式凸显的问题.在电子商务发展势如破竹,趋势不可逆转的大背景下,分析零售连锁企业大力发展电子商务的优势和劣势,总结出以下结论：在互联网时代,零售连锁企业尝试构建“云商”模式,推行线上与线下融合发展的全新模式,实现人、财、物多种资源的合理共享,推出线上电子商务与线下连锁门店共同发展的全新业态,必将开创我国零售连锁企业崭新的发展前景.     

基于Rose的UML系统建模方法研究

提出了基于Rose的UML(Unified Modeling Language，统一建模语言)系统建模方法，并以邮件系统开发为例，详细介绍其建模过程。实践证明，该方法不仅能提高系统的开发效率，又能减少系统开发成本。     

高职院校校企合作课程开发的互动模式研究

高等职业教育教育教学改革的核心任务之一是推行校企合作课程开发,其作用在于实现职业教育培养目标、彰显职业教育特色、促使校企合作深度融合。高职院校校企合作课程开发的互动模式是指实现学校、企业、课程专家和政府等四个课程开发主体间的有效互动,其具有课程开发主体互动意识明确、课程内容更新及时、课程评价机制创新等特征,在实践中获得了良好的效果。     

The acceptance of computer technology by teachers in early childhood education

This study investigated kindergarten teachers’ decision-making process regarding the acceptance of computer technology. We incorporated the Technology Acceptance Model framework, in addition to computer self-efficacy, subjective norm, and personal innovativeness in education technology as external variables. The data were obtained from 160 kindergarten teachers, from public kindergartens in Daejeon, South Korea. According to the results, subjective norm had the strongest effect on computer acceptance. In addition, perceived usefulness and computer self-efficacy had a direct effect on computer technology acceptance. On the other hand, perceived ease of use and personal innovativeness in education technology had an indirect effect on computer technology acceptance. The measures accounted for approximately 32% of the variance of intentions to use computers in kindergartens.