插补法CAI研究

数字程序控制计算机辅助教学是将计算机技术用于数字程序控制的教学过程，它帮助学生学习并模拟教学实验．本文介绍了数字程序控制中直线插补和圆孤插补的ＣＡＩ实现方法．     

教学动画制作系统Movie-Maker

Ｍｏｖｉｅ－Ｍａｋｅｒ是一个集成化的适合于结构化图形的教学动画制作工具，它具有较强的功能和通用友好的用户界面，可望为ＣＡＩ的发展作出较大贡献。本文主要阐述该系统的设计思想和总体结构。     

微电子电路PC机辅助教育系统

文章介绍法中两国合作开发的微电子电路计算机辅助教育系统中的两部分，重点陈述其中的辅助测试虚拟仪器和专用实验芯片，期望对电子测试领域的教育工作者和科技工作者有所启发。     

Multiresolution Representation of 2D CSG Models

Multiresolution is currently one of the main schemes used in CAD modeling for representing objects, particularly when large-scale geometric data must be transferred interactively over a network, as in the case of collaborative design. Increasingly complex products and growing competition have turned design into a collaborative team effort. Furthermore, the widespread development of Internet viewers has also necessitated the transfer and display of large-scale CAD models over networks. In order to reduce the volume of transferred data, efforts have been made to transfer CSG (Constructive Solid Geometry) models rather than those based on B_rep (Boundary Representation). This paper presents an original new method for speeding up data transfer by using multiresolution CSG models at different levels of details (LOD). The multiresolution CSG algorithm generates a hierarchy of multiresolution CSG trees; at each level, the shape is further approximated and represented by a smaller number of CSG primitives. The paper analyzes the proposed algorithm, and demonstrates its feasibility.     

《计算机辅助设计》课程教学模式探索

在《计算机辅助设计》课程教学中,理论教学与实践教学严重脱节,该门课程实践性强的特点得不到体现,教学效果不理想。根据多年的教学研究和教学实践,从教学内容、教学模式等方面出发,对计算机应用专业《计算机辅助设计》课程的教学进行一系列探索,采用＂以学生为中心＂的教学模式,强调学习过程中学生的参与和思考,激发学生自主学习的积极性,提高教学质量。     

Combining temporal partitioning and temporal placement techniques for communication cost improvement

In this paper, we present a typical temporal partitioning methodology that temporally partitions a data flow graph on reconfigurable system. Our approach optimizes the communication cost of the design. This aim can be reached by minimizing the transfer of data required between design partitions and the routing cost between FPGA modules. Consequently, our algorithm is composed by two main steps. The first step aims to find a temporal partitioning of the graph. This step gives the optimal solution in term of communication cost. Next, our approach builds the best architecture, on a partially reconfigurable FPGA, that gives the lowest routing cost between modules. The proposed methodology was tested on several examples on the Xilinx Virtex-II pro. The results show significant reduction in the communication cost compared with others famous approaches used in this field.     

Data‐Driven Bending Elasticity Design by Shell Thickness

We present a method to design the deformation behavior of 3D printed models by an interactive tool, where the variation of bending elasticity at different regions of a model is realized by a change in shell thickness. Given a soft material to be used in 3D printing, we propose an experimental setup to acquire the bending behavior of this material on tubes with different diameters and thicknesses. The relationship between shell thickness and bending elasticity is stored in an echo state network using the acquired dataset. With the help of the network, an interactive design tool is developed to generate non‐uniformly hollowed models to achieve desired bending behaviors. The effectiveness of this method is verified on models fabricated by different 3D printers by studying whether their physical deformation can match the designed target shape.     

网络CAI软件中动画过程的设计与实现

针对网络计算机辅助教学的将点和实际开发过程中积累的经验,提出各动画过程的设计思想,并简要给出陈春实现方法,讨论了用Ｊａｖａ的实现的网络教学系统中的尝试、演示关键功能携炔的具体技术。     

用于汉语语音信号端点检测与切分的有效方法

文章给出了计算机辅助汉语教学系统中语音端点信号的检测和清浊音信号的切分方法：采用短时相对能频积对汉语语音信号的端点进行检测;采用短时相对能频比的方法对语音信号的清浊音进行切分。这两种方法的使用与现有方法相比可以有效地提高汉语语音信号切分的成功率,实验结果表明正确率可达到９５％以上。文中通过实验验证了所提出的汉语语音信号切分方法是有效的和可行的。它基本上能够满足计算机辅助汉语教学系统在线切分汉语语音信号的需要,比已有的语音信号切分方法的切分效果有显著提高,为下一步提高语音信号的识别率奠定了基础。     

集中式符号库管理方法

在许多ＣＡＤ应用领域,经常需要建立符号库管理系统。该文主要介绍如何利用ＡＲＸ编程接口和ＶＩＳＵ－ＡＬＣ＾＋＋在一个图形文件里建立符号库的方法,并详细说明了符号库的结构以及保存符号信息的有名对象字典的结构。文中还介绍了符号入库、出库的几种方法,以及符号信息的管理方法。