LISP (Energy) — Some preliminary findings

Conclusion In concluding this tentative account of our research we can note that the research questions about teachers' alternative frameworks and their interaction with the curriculum and with classroom learning by students appear to be extremely important questions for researchers in the area of energy teaching and learning and presumably in wider contexts. There are also implications for science teacher education, both preservice and inservice. It is clearly necessary to address the confusion in both teachers' and students' understandings of energy. We would like to thank Mary and Jack, their Principals, and classes for allowing us to observe their teaching and learning, SERU colleagues for their sustained support and in particular Mark Cosgrove for his editing of this paper's drafts.     

在Visual LISP环境下的编制三维变径螺旋线程序

介绍了用AutoCAD2000中的Visual LISP开发工具开发三维圆柱、圆台螺旋线和平面蜗卷线程序，给出了开发程序代码和运行结果，以及用该程序在AutoCAD2000中绘制三维圆柱弹簧、三维圆台弹簧、螺纹以及平面蜗卷弹簧的实例。     

基于Visual LISP的AUTOCAD绘图命令的二次开发

介绍了LISP语言在AUTOCAD软件中的应用过程,并通过基准代号的二次开发命令实例进行说明,力图展示使用Visual LISP语言以及对话框控制语言对AUTOCAD二次开发的基本过程以及应用程序如何加载。     

基于Auto LISP与Pro/E的凸轮机构建模与仿真

根据Auto LISP与Pro/E的各自特点,用Auto LISP语言编程在AutoCAD中绘制出凸轮的复杂轮廓曲线,再导入Pro/E软件中实现凸轮设计及三维建模,并利用Pro/E软件人运动学分析模块Mechanism对凸轮机构进行运动学仿真和分析,缩短了凸轮的设计周期,提高了凸轮的设计质量,便于凸轮机构的优化设计。     

在VISUAL LISP环境下圆柱状螺旋弹簧建模的实现

圆柱状螺旋弹簧是机械工程中应用较多的一种复杂建模.圆柱状螺旋弹簧是由弹簧丝沿圆柱螺旋线盘绕而成.自由状态下工作圈部分弹簧丝间间距恒定.两端有支撑圈,该间距逐渐变小直至为零.在AutoCAD的工具箱中不方便绘制螺旋线,使用交互式建模方式也很困难.为了解决这个问题,本文通过