COMPUTER-AIDED GRAPHICS OF LIQUID-LIQUID EXTRACTION

An algorithm has been developed and tested for steady-state liquid-liquid extraction, using rectangular coordinates. It is capable of handling common types of stagewise contact, i.e., single stage extraction, multistage cross-current, and continuous countercurrent multistage extraction. The results depend on the nature of the extraction scheme and the extent of separation desired. While equilibrium data for some systems are stored in its data bank, the present portable computer simulator ( LIQEXT) has the flexibility of reading equilibrium data for other systems, as well as overriding stored data

Both design and rating cases can be performed. In the design mode, i.e., given the feed and solvent rates and the outlet concentration, it calculates the number of stages, the exit stream flow rates, and the concentration profile. In the rating ( or simulation) mode, i.e., given the feed and solvent rates, and the number of stages, it computes the exit streams flow rates and compositions, and the concentration profile. In both cases a graphical output of the concentration profile is produced, either on the screen or on a hard-copy plotter.     

CAD在化工装置设计中的应用及效果

当今，化工设计已普遍采用ＣＡＤ技术，覆盖面越来越广并贯穿于全过程。本文将简单介绍其实用情况和效果。     

注塑模微机CAD系统

本文介绍了一个微机上运行的注塑模ＣＡＤ系统，此系统主要解决了四个难点，浇注系统设计，冷却系统分析，型腔，型芯的曲面造型设计，装配图和零件工作图的设计绘制，经厂家实际运用证明，该系统使用方便，结果正确，能提高设计效率，降低生产成本。     

Explicit reference modeling methodology in parametric CAD system

Today parametric associative CAD systems must help companies to create more efficient virtual development processes. While dealing with complex parts (e.g. the number of surfaces of the solid) no CAD modeling methodology is existing. Based on the analysis of industrial designers' practices as well as student practices on CAD, we identified key factors that lead to better performance. Our objective in this article is to propose a practical method for complex parts modeling in parametric CAD system. An illustration of the performances and the results obtained by this method are presented comparing the traditional method with the proposed one while using an academic case and then an industrial case.     

注塑模具标准摸架数据库的开发

注塑模ＣＡＤ中机械设计模具种类繁多，但基本上还是趋于标准化的，为使模具的模架及标准部件有序调用，模架数据库管理系统（ＭＤＢＭＳ）及标准部件数据库管理系统（ＳＰＤＢＭＳ）成为注塑模ＣＡＤ系统中的关键问题。本文介绍了注塑模ＣＡＤ中的ＭＤＢＭＳ及ＳＰＤＢＭＳ的目标和任务，ＭＤＢＭＳ和ＳＰＤＢＭＳ应具有的功能和结构，其中的几何关键技术以及今后的展望。     

Supporting the design process with hypergraph genetic operators

In this paper an evolutionary technique is proposed as a method for generating new design solutions with genotypes represented in the form of hierarchical hypergraphs. Such hypergraph-based evolutionary design requires the adaptation of traditional evolutionary operators like cross-over and mutation. This paper presents an attempt at defining modified cross-over and mutation operators that act on hierarchical hypergraphs. The application of the proposed transformations is illustrated on examples of designing floor layouts and furniture with the use of the evolutionary method.     

管壳式蒸汽加热器CAD研究

将数值分析方法应用于管壳式蒸汽加热器的工艺计算,很好地解决了试凑法的盲目性和计算工作繁重的问题,并在此基础上用VisualBasic语言开发了管壳式蒸汽加热器工艺CAD软件。     

基于知识面向装配的注塑模CAD/CAE/CAM集成系统研究

通过分析注塑模具设计制造的特点,采用IDEF0的建模方法得到了基于知识面向装配的注塑模CAD／CAE／ CAM系统的层次结构、框架结构、设计流程和关键技术,系统包括概念设计、CAE分析、制造性评价、模具详细设计、运动模拟和CAM等6个模块。系统以基于特征的三维装配模型为核心,采用基于实例与基于知识相结合的推理方法进行概念设计,并对设计方案和设计结果进行评价。系统具有很好的集成性与柔性。     

纤维缠绕成型的CAD/CAM技术研究

纤维缠绕成型是制造高强度复合材料制品的一种重要的成型工艺方法，在国防和航天工业中占有重要地位，将CAD／CAM技术应用与缠绕中可以大大提高生产效率和产品质量、降低设计成本、缩短设计周期。简要概述了纤维缠绕成型CAD／CAM系统的总体方案、关键技术、优化设计，并介绍了国内外的研究进展。     

化工CAD课程教学研究

化工CAD是系统介绍CAD技术基本知识、基本概念以及在化工专业应用的课程.本文根据化工CAD课程内容特点,对该课程教学内容、教学方法和手段及考试方式进行了研究探讨,并应用于教学实践,取得了良好的教学效果.