基于CBR的注塑模结构知识库的研究与开发

根据注塑模具结构设计知识的类型和特点,研究了注塑模具结构设计知识库的知识表示方法,以Pro/Engineer软件为开发平台,运用人工智能领域的CBR思想,建立了注塑模具CAD/CAM系统的典型结构知识库。     

英雄是如何炼成的——《欧阳海之歌》再解读

新中国成立以后,社会主义的美好允诺对全国人民具有一种强大的召唤与凝聚力量。这是一个需要英雄也是一个大量产生英雄的时代,塑造英雄形象成为"十七年文学"的宏大叙事。长篇小说《欧阳海之歌》通过讲述欧阳海成长的故事,塑造了社会主义社会时期的英雄。对长篇小说《欧阳海之歌》进行再解读,就是分析那个时期的作家"如何建构起这样的历史叙述,在建构过程中经历了怎样的冲突和调整",才最终完成了那个时代的英雄叙事。     

42寸平板彩电前壳热流道气辅模具注塑工艺的研究

根据HIPS材料在注射成型过程中的特性,综合考虑注塑机、42寸平板彩电前壳结构、热流道气辅注塑模具结构以及气针进气式气辅注射成型的特点,经过实践摸索,选用了合理的注塑工艺参数,解决了生产过程中42寸前壳易产生的收缩痕、注不满、熔接痕、烧焦痕、变形、气胀、串气等缺陷的问题,提高了塑件的合格率。     

Methods and tools for the classification and cataloging of antique moulds from the collection of the Richard-Ginori factory

This study proposes a procedure for digitally classifying and cataloging moulds which belong to the historic collection of the Ginori porcelain factory in Doccia (Sesto Fiorentino, Italy). In addition to a vast number of antique plaster moulds, this collection includes artistic porcelain artifacts obtained from casting porcelain using the moulds and models made of various materials. The proposed methodology includes two workflows: the first starts with photographic and casting processes conducted recently on various groups of moulds and involves historical surveys for investigating the relationships between the various sets of moulds, the models from which they were derived and the porcelain objects derived from them. The second workflow was applied when no information was available for a set of moulds, and involved 3D scanning of the moulds, with virtual reconstruction of the corresponding model followed by a final art historical survey like that used in the first procedure. 3D scanning techniques and successive model reconstruction can also be applied for obtaining a virtual model in the first process, when the physical model was lost, damaged or never existed. The variety and extent of the Ginori collection suggested the use of a customized Data-Base (DB) and a set of functions designed to manage and extract information, data and archived images. This filing system, called DocciaDigitalArchive (DDA), also makes it possible to specify the relationships between the different typology samples (prototype models, moulds derived from them, handmade porcelain objects produced from these moulds), which are associated when the same subject is portrayed. The DB structure conceived also provides the possibility of incorporating pictures and data of known archetypes. This additional information makes it possible to place each subject in its historical and artistic context. For each sample filed in the DDA system, documentary cards, which summarize data, images, reports and links to other entities or samples connected to the subject consulted, can be viewed on a suitable interface.     

结晶器液位控制系黜S功蝴中的应用

本文主要概述了结晶器液位控制系统的控制原理以及在CSP连铸机中的重要作用。     

对外汉语教学的几个问题

对外汉语教学是近年来新兴的一门学科,本作在教学实践中探讨了对外汉语教学的性质,内容,特殊性,化教学,教学模式以及其它几个问题,提出了将对外汉语教学与英语教学进行比较,从而提高对外汉语教学水平的观点.     

快速成形技术的发展及在模具制造业的应用

传统制造技术在提高零件原型制作速度上存在很大的局限性，快速成形技术（RPM）作为一门全新的高新综合技术，以其独特的优势弥补了这方面的不足，特别是在模具制造业和新产品开发应用上具有广阔的市场前景。该技术发展势头良好，在国内外许多行业市场潜力巨大，有可能成为一般加工方法而挤身制造业行列。     

镶拼式模具结构在生产中的应用

在模具设计制造过程中，经常遇到复杂型腔和尖角问题，镶拼式结构在一定的程度上改善了模具加工工艺性，本文介绍了镶拼式模具结构在大型的冲裁模和异型冷挤压模中的应用．     

基于CAE的汽车驾驶室仪表外框注塑模具设计

针对汽车驾驶室仪表外框塑件的结构特点及使用要求,利用Moldflow Plastic Insight(MPI)软件进行模拟分析,完成了浇注系统和排气系统的设计.对于不同结构形式的侧孔,分别设计了斜导杆内侧抽芯机构,矩形斜导柱内侧抽芯机构和圆形斜导柱外侧抽芯机构.最后设计了汽车驾驶室仪表外框的注塑成型模具.借助CAE技术,缩短了模具研制周期,有助于提高产品质量.     

CAD/CAE技术在塑料模具中的应用

塑料产品一般采用模塑成型方法生产,因而塑料模具已成为一种重要的生产工艺装备,在国民经济中起着越来越重要的作用。随着塑料产品在家电、电子、机械等产品和日常用品中的越来越广泛应用,对塑料模具的设计和制造的要求也越来越高。传统的手工设计与制造方式早已满足不了生产发展的需要。计算机辅助设计/计算机辅助分析(CAD/CAE)技术的发展正适应了这种客观实际的要求。