水轮机引水部件的水力损失模型

本文建立了水轮机引水部件的水力损失模型，并用该模型对两算例进行了损失计算，计算结果表明：该模型能反应出引水部件水力损失的变化趋势，新提出了蜗壳水力损失模型更切合实际，可用于水轮机引水部件的水力优化。     

Language,vision and metaphor

The integration of language and vision capabilities in computers can be seen purely as a multi-media task without any theoretical assumptions being required. However, it is worth exploring whether the modalities have anything serious in common, in particular in the light of claim that most non-technical language use is metaphorical. What consequences would that have for the underlying relationship of language and vision: is it possible that vision is largely metaphorical? The conclusion (see also, Wilks 1978b and Wilks and Okada (in press) is that visual processing can embody structural ambiguity (whether compositional or not), but not anything analogous to metaphor. Metaphor is essentially connected with the extension of sense and only symbols can have senses. But if it makes no sense to say a figure can be metaphorical (unless it embodies symbolic elements) that must also mean, alas, that it makes no sense to say it is literally anything either. Only a symbol can be literally something. A hat is a hat is a hat, but never, ever literally so.     

基于多层推理机制的机械产品概念设计

将类比推理的方法与基于实例的方法相结合，建立了基于多层推理的机械产品概念设计系统、知识的表示，采用面向应用的规则方法，框架式的知识结构。该系统有自学习的能力，也可以由用户进行知识的更改和完善，用户界面良好。     

3in环保型礼花弹壳模具的设计与制造

用稻草、麦杆等农业废弃物生产环保型礼花弹壳是一种节材技术。通过改革生产工艺,用CAD设计模具,并用数控机床把模具制造出来,再用模具生产出环保型礼花弹壳新产品是非常有价值的。     

基于特征扩展卷积神经网络的案件微博观点句识别

通常的微博观点句识别主要根据微博评论本身是否带有观点来进行判断,而案件微博的观点句识别需要进一步考虑该评论是否讨论与特定案件相关的主题。针对这一任务,该文提出一种结合微博原文进行特征扩展的观点句识别模型。以卷积神经网络分类模型为基本框架,在嵌入层加入案件微博原文中的关键词向量,与对应评论词向量进行拼接;利用扩展的特征进行观点句识别。实验表明,该模型在根据案件微博爬取的两个数据集下准确率分别达到84.74%和82.09%,与现有的基准模型相比有较明显提升。     

DEST 2.0：一个基于实例原型的设计支持工具

本文介绍一个基于实例原型的设计支持工具ＤＥＳＴ２．０。在定义了实例原型之后，本文介绍了ＤＥＳＴ２．０的系统建立，并详细描述了基于神经网络的实例相似度的判定算法以及基于约束的方案修改策略。     

ATM业务监控的最差通过流分析及二级漏桶算法

讨论了一定算法下最差通过流的概念，强调了最差通过流的参数特性是评价一种业务监控算法的重要指标之一。对基本漏桶和缓冲漏桶逄法进行了比较。     

某大型客车变速器壳体动态特性与强度分析

变速器壳体是汽车动力传动系统的主要噪声辐射件之一,其动态特性影响到变速器的结构振动,并产生噪声.对壳体进行模态分析有利于改进结构,而结构强度分析可以进一步验证壳体结构设计的合理性.文章以某大型客车变速器壳体为研究对象,通过建立壳体三维模型,运用有限元软件完成壳体的模态分析与其特定工况的强度分析,分析结果表明：该变速器壳体的结构设计具有良好的动态特性,同时在特定工况下能够满足设计强度的要求.     

Case-based retrieval approach for machining fixture design utilizing ontology

In order to develop an intelligent case-based reasoning （CBR） system to reuse fixture de- sign knowledge, ontology technology was integrated in CBR system by semantic annotation of fixture design case. Domain ontology of fixture design was constructed; concepts and relations were de- fined and represented. The 2-level similarity evaluation approach of domain ontology was presented. The concept similarity of cases was calculated as the first grade case retrieval. Numerical measure- ment was the second grade case retrieval, which adopted various methods to calculate different types of attribute values. The problem of similarity measurement of fixture design case was resolved. Pro- totype system based on the proposed method was illustrated and the retrieval approach was proved to be efficient.     

复杂产品方案设计中公理化设计和多级实例推理的研究

为提高复杂产品设计的客户满意度和规范性以及设计本身的智能性,利用公理化设计的科学规范性并将其作为复杂产品设计的基础流程和模型,充分发挥它在设计中的优点。在此基础上为提高设计的智能性,运用多级实例推理的知识根据客户需求得到的功能特性、物理特性、工艺特性建立相应的多级实例库,并从多级实例库中根据功能特征进行搜索,通过功能特征的匹配,得出物理特征以及对应的工艺特征,最终得出符合要求的实例方案,然后对搜索出的实例根据公理化设计进行修改评价最终得出复杂产品的设计方案。通过实例验证了此方法的可行性。