基于CAPPFramework的CAPP专家系统研究与实践

论文基于863目标产品CAPPFramework(CAPP应用框架与开发平台),采用面向对象的信息分析与建模,介绍了面向对象的CAPP专家系统平台构建技术,包括面向对象的知识获取、知识表示、工艺决策推理,并介绍了该CAPP专家系统平台在2-5坐标平面结构件CAD/CAPP/CAM数控编程系统中的应用。     

基于CLIPS的电厂水汽循环故障诊断专家系统

介绍了基于C语言的专家系统开发平台-CLIPS，以及用CLIPS开发的电厂水汽循环故障诊断专家系统的基本结构、功能、推理过程等，最后给出了诊断过程。该专家系统能够根据电厂水汽循环系统的故障现象进行自动诊断，为水汽循环系统的故障诊断、分析和排除提供了较大实用价值。     

工艺设计及加工可行性评价专家系统的开发

CAD、CAP和CAM并行设计就是在设计过程中随时对设计的中间结果给出设计合理性及加工可行性评价。微机CAD多采用AutoCAD软件开发，而工艺设计和加工可行性评价通常采用专家系统。笔者注意到AntoLISP在人工智能领域的应用还没有得到足够的重视，所以尝试用AutoLISP语言开发面向并行设计的专家系统，从而使CAD、CAP和CAM集成在同一软件环境下。本文提供了一种用AutoLISP语言开发工艺设计和加工可行性评价专家系统的方法，给出了一组用于推理的基本函数。     

时序推理机的设计与应用

早期的专家系统开发工具仅仅提供了一种基于规则的知识表示方法，这种方法简单且推理能力很有限，开发者在选择知识表示的元基、搜索策略、专用推理机时感到困难。新一代组合式专家系统开发工具（opieExpertSyste。Tool）在功能、性能、用户接口。推理和效率等方面都比以往的专家系统开发工具有了很大提高，并且引入了时序推理机制。我们研制的发电机故障诊断专家系统13CTD（风邪rts｝stemforGenebongsetTIDubeDiopod吧）是用组合式专家系统开发工具作为开发平台，MGTD其主要特点有：（l）具有三个窗口：会话窗口、推理路径窗口及显示…     

专家系统工具CLIPS与C语言的程序接口

ＣＬＩＰＳ与Ｃ语言的程序接口实现了对专家系统的知识库和推理信息的访问，为ＣＬＩＰＳ和Ｃ语言的程序设计提供了数据访问功能。利用该接口可以解决目前专家系统开发中的一些问题，对促进ＣＬＩＰＳ的应用、专家系统的开发和为Ｃ语言程序设计提供人工智能的功能具有重要的意义。     

专家系统在设备检修中的应用

专家系统是人工智能的一部分。有推理功能，可根据设备的故障现象推理出故障部位，给检修人员带来方 便。应用AutoLISP语言编写专家系统，可将推理结论用图形显示在屏幕上，达到直观、形象、清晰的效果。本文将介 绍这方面的内容。     

分布式实时专家系统平台IRS3的设计与实现

IRS3系统是一个分布式实时专家系统平台。基于该平台要以开发实时专家系统并分布到使用单位。该文介绍了IRS3系统设计与实现,阐述了IRS3的总体框架,介绍了在平台开发过程中解决实时推理、面向对的图形化建模、知识库管理、网络协同等问题的思路,最后总结了该系统的特点。     

产生式规则专家系统的原理与实现

不确定的知识表示与知识推理是专家系统研究和开发的难点。本文利用“目标驱动”方法中控制模块、规则库和事实数据库的操作原理，使用SQL Server2000和Delphi 6．0作为开发平台，通过数据格式和算法的设计构造并实现了一个产生式规则专家系统。该系统实现了不确定性知识表示和知识推理的计算机化，用户只需要为系统提供足够的已知数据，就可以获得专家水平的结论。     

熔化焊机器人焊接专家系统

本文在MESSER IGM公司生产的Tri-2000弧焊机器人上，利用Visual C++ 6.0 开发 出了熔化焊机器人焊接专家系统．该系统沿用常用专家系统的开发方法，采用分层推理，最 终将机器人所需焊接工艺参数直接传送给机器人控制器，较好地实现了专家系统和弧焊机器 人的结合．     

甘蔗收获机械可视化虚拟设计平台的研究开发

介绍了甘蔗收获机械可视化虚拟集成设计平台研究开发的基本思路。该平台的构建通过STEP标准建立产品开发的全局共享信息模型，利用PDM软件集成和封装CAD／CAE及其它产品设计过程中用到的应用软件；平台也集成了甘蔗收获机械设计、分析和评价专家系统，专家系统采用模糊评价的方法对开发过程设计和仿真分析的结果进行评价和决策。集成平台支持甘蔗收获机械可视化虚拟产品集成化的团队设计及收获机械系列化产品开发。     

CAD软件可重用机制的研究

基于软件重用技术与实例基技术间的相似性，在冲模ＣＡＤ软件可重用系统的研究中，用实例基推理技术实现了软件可重用思想。     

基于J2EE的桥梁协同设计模型

协同设计是工程设计发展的必然趋势,针对桥梁设计对协同工作的需求,把协同设计思想与桥梁CAD系统结合起来,提出基于J2EE平台的桥梁协同设计系统,包括桥梁协同设计的数据表达模型、基于几何约束的推理算法和基于设计约束的推理算法,以桥梁抗震设计群体、结构设计群体和地震动信息采集群体的协同工作为例验证系统的可实施性。     

参数化CAD-CAPP系统技术的研究与应用

针对现代制造企业对信息集成的需求,研究了参数化CAD/CAPP系统的原理及相关技术.利用相似性原理、可重用性原理、实例推理技术、设计知识库技术、参数化技术开发了参数化CAD模块.开发了基于设计知识数据驱动、工艺知识约束修改典型工艺模板的派生式参数化CAPP模块.并建立了巷道式双立柱堆垛机参数化CAD/CAPP系统,实现...     

Computationally Effective Reasoning About Goal Interactions

It is important that intelligent agents are able to pursue multiple goals in parallel, in a rational manner. In this work we have described the careful empirical evaluation of the value of data structures and algorithms developed for reasoning about both positive and negative goal interactions. These mechanisms are incorporated into a commercial agent platform and then evaluated in comparison to the platform without these additions. We describe the data structures and algorithms developed, and the X-JACK system, which incorporates these into JACK, a state of the art agent development toolkit. There are three basic kinds of reasoning that are developed: reasoning about resource conflicts, reasoning to avoid negative interactions that can happen when steps of parallel goals are arbitrarily interleaved, and reasoning to take advantage of situations where a single step can help to achieve multiple goals. X-JACK is experimentally compared to JACK, under a range of situations designed to stress test the reasoning algorithms, as well as situations designed to be more similar to real applications. We found that the cost of the additional reasoning is small, even with large numbers of goal interactions to reason about. The benefit however is noticeable, and is statistically significant, even when the amount of goal interactions is relatively small.     

CAD-integrated analysis of 3-D beams: a surface-integration approach

Most engineering artifacts are designed and analyzed today within a 3-D computer aided design (CAD) environment. However, slender objects such as beams are designed in a 3-D environment, but analyzed using a 1-D beam-element, since their 3-D analysis exhibits locking and/or is computationally inefficient. This process is tedious and error-prone. Here, we propose a dual-representation strategy for designing and analyzing 3-D beams, directly within a 3-D CAD environment. The proposed method exploits classic 1-D beam physics, but is implemented within a 3-D CAD environment by appealing to the divergence theorem. Consequently, the proposed method is numerically and computationally equivalent to classic 1-D beam analysis for uniform cross-section beams. But, more importantly, it closely matches the accuracy of a full-blown 3-D finite element analysis for non-uniform beams.     

Hybrid CAD/E platform supporting exploratory architectural design

Although computers prove useful in aiding human creativity, there is still shortage of adequate software for early-stage explorations in the design disciplines. One of such under-supported disciplines is architectural design. In response to this lack of proper software, architects adopted tools from other industries with a large level of success. However, despite the fact that several types of such tools have now been employed in conceptual architectural design, their application indicates that they are seldom used altogether.This paper presents a hybrid software platform, bringing these various CAD and CAE tools into one design toolkit. Each platform tool introduces a different possibility of designing, and supports computation-based activities, human intuitive ones, or a mixture of both. The platform user can freely switch between various working styles: algorithmic on the one hand, and fuzzy on the other. Moreover, the designer can perform tasks impossible to execute in traditional design, such as quick generation, exploration and evaluation of large design spaces, containing geometrically-complex solutions. The testing of the hybrid platform in a design experiment indicates its ability to support meaningful early-stage explorations and to yield a highly creative design.One of the aims of investigating a CAD/E platform based on the existing software is to lay the foundations for the development of a future CAD/E system for early-stage architectural design — a tool which is currently missing in the architectural practice. By revealing the potentials of the ready-made software, and by pointing out the technical challenges associated with its integration, we wish to suggest a possible direction for future studies, so that solutions developed by academia have higher chances of being noticed and more widely implemented in praxis.     

基于贝叶斯网络的系统可靠性分析平台

贝叶斯网络是一种进行不确定性推理和分析的有效工具,针对系统可靠性分析问题,建立了一种基于贝叶斯网络的系统可靠性分析平台。所建立的分析平台将贝叶斯网络应用于系统可靠性分析中,把系统各组部件抽象成节点,从而构成贝叶斯网络模型;通过推理和分析算法找到影响系统可靠性的薄弱环节;通过计算某个部件发生变化时对整个系统的影响,得出各个节点的重要度,给出合理的优化方案,提升系统可靠性。通过对平视显示器实例进行分析,计算了每个组部件对整个系统的影响程度,证明该分析平台在利用贝叶斯网络对系统可靠性分析上的可行性。     

SU-8 microstructure for quasi-three-dimensional cell-based biosensing

A quasi-three-dimensional (quasi-3-D) cell-based biosensor platform microfabricated from SU-8 has been developed and characterized. In this work, SH-SY5Y human neuroblastoma cells were integrated with SU-8 microfabricated microwells with diameters of 100 μm. SH-SY5Y cells were differentiated with 1 mM dibutyryl cAMP and 2.5 μM 5-bromodeoxyuridine. Voltage-gated calcium channel (VGCC) function of SH-SY5Y cells cultured within the microwells (quasi-3-D) versus those cultured on the SU-8 planar substrates (2-D) was evaluated by confocal microscopy with a calcium fluorescent indicator, Calcium Green-1. In response to 50 mM high K⁺ depolarization, cells in microwells were less responsive in terms of increase in intracellular Ca²⁺ in comparison to cells on 2-D substrates. This study shows that VGCC function of cells within SU-8 microwells was indeed different from that of cells on planar SU-8 surfaces, suggesting that SU-8 microstructure did affect SH-SY5Y cell differentiation with respect to VGCC function and that high-aspect-ratio microstructures are not merely “folded” 2-D structures. Furthermore, these results are consistent with previous 2-D/3-D comparative studies carried out in polymer scaffolds and support the hypothesis that cell calcium dynamics on 2-D substrates may be exaggerated. Overall, this work is supportive of SU-8 micropattern as a viable platform for engineering a quasi-3-D cell culture system for cell-based biosensing against drugs for VGCCs.     

基于Silverlight的在线CAD绘图平台

鉴于中小企业难以承担CAD软件高昂费用,使用Silverlight开发了机械零部件在线设计平台.图形元素通过Treeview以树状结构组织.用户通过对图形元素进行属性值修改、编辑和操作等来实现设计,可以将设计文件导出图片和AutoCAD格式.实测表明,平台简单易用,界面友好,对于提高中小企业的技术水平有很大帮助.