一种基于RFID的化工危险品企业人员定位算法研究

针对化工危险品企业无法全面、及时、准确地掌握厂区内人员实时分布信息,从而间接导致事故发生的问题。采用RFID定位系统,介绍了RFID阅读器拓扑网络定位算法,针对算法不足提出了结合VIRE定位算法的改进方法。通过在阅读器周围部署参考标签和虚拟标签来解决模型中目标标签同时被两个以上的阅读器识读的难题,最后找出目标标签的实时位置坐标。并采用使得定位精度更高的权重因子计算公式解决Ej＝0的问题。实验证明：在复杂环境中与RFID阅读器拓扑定位算法相比改进算法在定位精度上有显著提高。     

基于虚拟仪器的信号分析系统实验设计

虚拟仪器的应用现在越来越广。结合现有的教学条件,针对信号与系统课程实验不足,阐述了利用虚拟仪器,结合NI （National Instraments）的PCI－6221数据采集卡可构成实验教学的硬件平台,实现信号的产生和采集功能。用NI公司的虚拟仪器开发环境LabVIEW2010开发了多个不同的信号实验。     

‘I like the sound of that’ – an evaluation of providing audio feedback via the virtual learning environment for summative assessment

This study aims to ascertain student and staff attitudes to and perceptions of audio feedback made available via the virtual learning environment (VLE) for summative assessment. Consistent with action research and reflective practice, this study identifies best practice, highlighting issues in relation to implementation with the intention of redesigning activities in the light of the findings. It utilises four case studies where audio feedback was provided to students using the Wimba voice authoring tool within Blackboard Learn+ for various types of summative assessment. The intention was to identify how and in what context audio feedback via the VLE is effective and why. The research was undertaken via a combination of techniques, including a student survey and staff reflective logs. The findings indicate that students liked the convenience, effectiveness, flexibility and personalised nature of this feedback, but raised concerns with some aspects of the technology. This paper also makes practical recommendations for the use of the feedback mechanism, focusing on the most effective use of the digital medium, and highlights directions for future research.     

Factors impacting the rapid transition of anatomy curricula to an online environment in response to Covid-19

Due to the Covid-19 pandemic, many academic institutions had to rapidly transition education to a remote online environment. While a hurdle for most educators, this transition posed an even greater challenge for anatomy educators, many of whom were forced to depart from the traditional cadaver-based laboratory to a virtual format. Recent publications have discussed the rapid transition to online formats necessitated by Covid-19 and the accompanying difficulties, but none have identified specific factors that influenced the difficulty of this transition. Anatomy educators were surveyed to examine how this transition was accomplished and perceived. Of the 165 educators who responded, the majority utilized cadaver-based laboratory instruction. Educators felt that transitioning the laboratory portion of their courses was significantly more difficult and required more time than converting lecture materials. Factors that impacted the difficulty of the transition included a number of pedagogical aspects of the pre-Covid-19 curricula, including the delivery format of prior content, availability of pre-existing electronic materials, and the laboratory technique previously used. Additionally, the length of time an educator had been teaching prior to Covid-19 impacted their perception of difficulty, with newer and more senior educators finding this much more challenging than mid-tenure educators. Ease of transition may be related to previous exposure to curricular reform, experience with multiple anatomy pedagogies, and educator adaptability. While not surprising that converting a cadaver-based laboratory to an online format was challenging, knowledge of the alignment of this difficulty with prior educator pedagogy can help guide future innovations to anatomy education.     

Digital body preservation: Technique and applications

High-fidelity anatomical models can be produced with three-dimensional (3D) scanning techniques and as such be digitally preserved, archived, and subsequently rendered through various media. Here, a novel methodology—digital body preservation—is presented for combining and matching scan geometry with radiographic imaging. The technique encompasses joining layers of 3D surface scans in an anatomical correct spatial relationship. To do so, a computed tomography (CT) volume is used as template to join and merge different surface scan geometries by means of nonrigid registration into a single environment. In addition, the use and applicability of the generated 3D models in digital learning modalities is presented. Finally, as computational expense is usually the main bottleneck in extended 3D applications, the influence of mesh simplification in combination with texture mapping on the quality of 3D models was investigated. The physical fidelity of the simplified meshes was evaluated in relation to their resolution and with respect to key anatomical features. Large- and medium-scale features were well preserved despite extensive 3D mesh simplification. Subtle fine-scale features, particular in curved areas demonstrated the major limitation to extensive mesh size reduction. Depending on the local topography, workable mesh sizes ranging from 10% to 3% of the original size could be obtained, making them usable in various learning applications and environments.     

基于虚实结合的船舶制造实训基地建设分析

实训基地是实践环节实施的重要载体。渤海船舶职业学院船舶工程技术生产性实训基地分区域进行建设,按船舶制造流程分析相应工作岗位,建设相应技能课程和配套实训设备。在现有建设基础上分析基地优化方向,实现配套的虚拟船厂和完成船舶智能制造仿真基地建设,并分析了基地建设虚实结合的必要性、重要性和先进性,对大型装备制造类的实训基地建设有一定的借鉴和指导意义。     

Teachers Curating Virtual Exhibitions for Learning Visual Arts: A Study of Impact and Effectiveness

Although visual arts teachers have free access to high quality online artwork images offering them immense teaching resources, making meaningful use of them remains a pedagogical challenge. During the COVID-19 pandemic, the transition from face-to-face to online teaching caused an immediate need for teachers to enhance their digital competencies and technological capability for planning and delivering a blended art curriculum. Herein, I propose a ‘teacher-curator pedagogy’ via a study in six primary and secondary schools in Hong Kong to assess its effectiveness. The study took place in the academic year of 2021-22 with 331 student participants. The proposed pedagogy puts visual arts teachers in the role of ‘digital curators’ who create virtual exhibitions for teaching art appreciation and artmaking. This paper addresses the theoretical framework, implementation strategies, and the results of the study highlighting its effectiveness, impact and limitations on teaching when using teacher-curated virtual exhibitions in both physical and virtual learning contexts. It was found that the technological capacity and confidence of the teacher participants was enhanced through the use of online resources and virtual exhibition tools. Making use of the 3D presentation of exhibits in themes and context through digital content curation, the teachers engaged students with deep interaction through the blending of online and face-to-face teaching. However, the proposed pedagogy was limited by the high demand of training and preparation work, hardware and software support, and difficulties in assessing and monitoring learning beyond class.