虚拟制造技术在电动工具设计中的应用

该文简要介绍了虚拟制造技术尤其是虚拟样机技术目前的发展状况，阐述了当前电动工具行业的一些发展趋势，指出对虚拟样机技术的需要，并结合实际提出了一种电动工具行业或轻型机械行业应用虚拟制造技术的原则、重点及方法，并利用虚拟样机技术对一电动射钉枪联动钢绳易断问题给出分析和解决方案。     

三维虚拟工作平台应用于高职组装与维护课程教学的研究

针对当前《计算机组装及维护》课程实验教学的不足,结合虚拟现实技术和三维建模技术,论述了三维虚拟工作平台构建的意义和必要性,并根据设计目标给出了三维虚拟工作平台相应功能模块的设计。三维虚拟工作平台可以完成用户与虚拟实验设备的交互,并具有实验考核和实验管理的功能,达到了教学的目标。     

Activity Theory and System Design: A View from the Trenches

An activity theory model and a mediatingartifacts hierarchy were employed to helpidentify the needs for tools for customersupport engineers who documented solutions tocustomer problems, a knowledge authoringactivity. This activity also involves customersupport engineers who assist Hewlett-Packardsoftware product users. The particular toolsto be designed were knowledge-authoring toolsembedded in the customer support trackingapplication suite, SupportTracker. The researchanalyzed the role of tensions between theelements of Engeström's activity theorymodel. The research also explored the benefitsof specific interpretations of Engeström'srefinement of Wartofsky's mediating artifactshierarchy. The hierarchy contributed to theidentification of desired characteristics ofmediating artifacts, particularly tools. Thefindings included an interpretation of the``where-to' artifact concept as supporting anunderstanding of the entire activity system asan evolving entity. Specific interventionswere used to achieve a positive impact on theevolution of the activity system.     

Pedagogical agents as learning companions: the impact of agent emotion and gender

Abstract  The potential of emotional interaction between human and computer has recently interested researchers in human–computer interaction. The instructional impact of this interaction in learning environments has not been established, however. This study examined the impact of emotion and gender of a pedagogical agent as a learning companion (PAL) on social judgements, interest, self-efficacy, and learning. Two experiments investigated separately the effects of a PAL's emotional expression and empathetic response. Experiment 1 focused on emotional expression (positive vs. negative vs. neutral) and gender (male vs. female) with a sample of 142 male and female college students in a computer literacy course. Experiment 2 investigated the impact of empathetic response (responsive vs. non-responsive) and gender with 56 pre-service teachers. Overall, the results yielded main and interaction effects of PAL emotion and gender on the dependent variables. In particular, the PAL's empathetic response had a positive impact on learner interest and self-efficacy; PAL gender had a positive impact on recall. The findings imply that the emotion and the gender of the digital learning companion could be utilized to optimize college students' motivation and learning.     

Design and manufacturing of sheet-metal parts: Using features to aid process planning and resolve manufacturability problems

This paper describes an integrated system for the design and production of sheet-metal parts. We have identified some important features for the sheet-metal bending process. These features are automatically generated as the design progresses. After the designs are complete, our automatic process planning system uses the features and generates new ones to aid the production of plans with near-minimum manufacturing costs. Finally, these plans are used to produce parts on an automatic bending system.Once a plan is generated, it can be used to manufacture the part, and to provide feedback to design and other factory systems. The application of features and the potential feature interaction problems are discussed. Several key manufacturing problems are also considered and the result of planning is used to resolve these problems. By solving these feature interaction problems and often practical manufacturing issues, we are able to plan and manufacture the majority of the parts we have tested less than one hour after the flat patterns are prepared.