Automatic 3D model reconstruction of cutting tools from a single camera

Collision detection by machining simulation requires the 3D models of rotating cutters. However, the 3D models of a cutter and holder are not always available. In this paper, a new method is proposed to design an automatic vision-based 3D modeling system, which is able to quickly reconstruct the 3D model of a cutter and holder when they are installed onto the spindle. Only a single camera is mounted on the machine tool to capture the image of the rotating cutter and holder. By viewing the rotating cutter and holder as an object of surface of revolution, the contour of the imaged cutter and holder can be used to reconstruct the 3D model as a stack of circular cross-sections. Then the complete generating function of the cutter and holder can be recovered from the cross-sections. Finally, the 3D model of the cutter is built by rotating the generating function around the spindle axis. The effectiveness and accuracy of the proposed method are verified by experiments on-machine using 12 kinds of cutters and holders, which can satisfy the requirement of collision detection.     

公选课《动画设计—Flash》教学的一点经验

高校公选课程的开设是培养大学生综合素质的重要渠道之一,《动画设计—Flash》以其生动鲜活、实用性强、易学易用的特点深受广大同学的欢迎。该文根据教学实践,从教学内容的安排、教学手段与方法、考核方式三个方面进行了阐述。     

The use of ‘exploratory learning’ for supporting immersive learning in virtual environments

User interfaces are becoming more intuitive following the requirements of the individual learner and reinforcing the drive towards more personalised learning and greater learner autonomy. There are clearly a new set of challenges emerging for teaching practitioners that will have implications upon not just what is learned but importantly upon lesson planning. This paper explores these changes to teaching through a consideration of an exploratory learning model which allows practitioners to rethink how they teach in 3D and immersive spaces where learning sequences and experiences are choreographed to support peer interactions and exchanges. The ELM extends from Kolb’s experiential learning model to adapt the use of 3D applications, and provides examples from research and development projects to exemplify how the model works in practice. Teaching in these contexts provides less emphasis upon curriculum and more emphasis upon sequencing learning experiences, meta-reflection, peer assessment and group work.     

Cartoons beyond clipart: A computer tool for storyboarding and storywriting

This paper describes the motivation, proposal, and early prototype testing of a computer tool for story visualisation. An analysis of current software for making various types of visual story is made; this identifies a gap between software which emphasises preset banks of artwork, and software which emphasises low-level construction and/or drawing. A proposal is made to fill this gap, and a prototype implementation of the proposal is described in the context of a school-based study with England and Wales’s Year 5, covering ages 9–10 years. Results from this prototype study both validate the novel proposal made and demonstrate that children are capable of manipulating characters and notional camera angles in a more complex way than most current software permits.     

农业搜索引擎中文分词工具对比

中文分词是中文语言处理技术中最关键的部分,被作为其中最重要的预处理手段广泛应用.本文主要分析和比较了ASPSeek、ICTCLAS、Paoding、MMseg、IK与JE六种分词工具对农业搜索引擎的影响.结果表明:在农业搜索引擎的应用效果中,分词准确性最优的是ICTCLAS分词工具,而F1测度最高的是JE分词工具.     

基于模型的方法在软件测试领域的应用与发展

伴随着软件在当今社会中扮演着日益重要的角色,在各类软件或系统的开发过程中,测试变得越来越重要.随着面向对象技术的广泛应用和软件测试自动化的要求,基于模型的测试(MBT)技术逐渐得到了软件开发和测试人员的认可和接受.尽管有许多国内出版物讨论了基于模型的测试技术,但还没有相关技术文章对MBT技术及工具的当前发展进行回顾与总结.文章对当前MBT技术的通用模型、测试用例生成方法、测试目标选择等MBT方法进行回顾,并对基于模型的自动化测试工具、应用实践进行了概述.最后,探讨了MBT技术的未来发展与研究方向.     

HLA联邦开发执行过程及发展趋势

对高层体系结构（HLA）的组成、最新发展的联邦开发执行过程（FEDEP）和支撑软件进行了详细的介绍,给出了联邦开发执行过程的发展趋势,并对我国开展这方面的研究提出了方向和目标。     

Building language resources for a Multi-Engine English-Filipino machine translation system

In this paper, we present the building of various language resources for a multi-engine bi-directional English-Filipino Machine Translation (MT) system. Since linguistics information on Philippine languages are available, but as of yet, the focus has been on theoretical linguistics and little is done on the computational aspects of these languages, attempts are reported here on the manual construction of these language resources such as the grammar, lexicon, morphological information, and the corpora which were literally built from almost non-existent digital forms. Due to the inherent difficulties of manual construction, we also discuss our experiments on various technologies for automatic extraction of these resources to handle the intricacies of the Filipino language, designed with the intention of using them for the MT system. To implement the different MT engines and to ensure the improvement of translation quality, other language tools (such as the morphological analyzer and generator, and the part of speech tagger) were developed.