基于VB的滚动轴承CAPP系统设计与实现

为了提高滚动轴承工艺设计效率和准确性,利用Access建立轴承工艺标准数据库,实现轴承工艺数据信息的存储和管理,利用VB编程语言对Access系统内存储的数据信息进行关联调用,最终以Excel形式呈现,并通过设计友好的人机交互界面,实现用户与软件系统的良好沟通,最终开发出VB和Access两者有机结合的滚动轴承工艺设计与管理应用软件,实现轴承工艺数据信息的存储、查询、更新、生成与应用,进一步提升轴承工艺设计、管理的质量和效率。

Component-based Control Software Design for Flexible Manufacturing System

A new method that designs and implements the component-based distributed & hierarchical flexible manufacturing control software is described with a component concept in this paper. The proposed method takes aim at improving the flexibility and reliability of the control system. On the basis of describing the concepts of component-based software and the distributed object technology, the architecture of the component-based software of the control system is suggested with the Common Object Request Broker Architecture (CORBA). And then, we propose a design method for component-based distributed & hierarchical flexible manufacturing control system. Finally, to verify the software design method, a prototype flexible manufacturing control system software has been implemented in Orbix 2.3c, VC + + 6. 0 and has been tested in connection with the physical flexible manufacturing shop at the WuXi Professional Institute.

Component-based software reliability process simulation considering imperfect debugging

In view of the flaws of component-based software （CBS） reliability modeling and analysis, the low recognition degree of debugging process, too many assumptions and difficulties in obtaining the solution, a CBS reliability simulation process is presented incorporating the imperfect debugging and the limitation of debugging resources. Considering the effect of imperfect debugging on fault detec- tion and correction process, a CBS integration testing model is sketched by multi-queue muhichannel and finite server queuing model （MMFSQM）. Compared with the analytical method based on pa- rameters and other nonparametric approaches, the simulation approach can relax more of the usual reliability modeling assumptions and effectively expound integration testing process of CBS. Then, CBS reliability process simulation procedure is developed accordingly. The proposed simulation ap- proach is validated to be sound and effective by simulation experiment studies and analysis.

CCPA: Component-based communication protocol architecture for embedded systems

For increased and various communication requirements of modem applications on embedded systems, general purpose protocol stacks and protocol models are not efficient because they are fixed to execute in the static mode. We present the Component-Based Communication Protocol Architecture （CCPA） to make communication dynamic and configurable. It can develop, test and store the customized components for flexible reuse. The protocols are implemented by component assembly and support by configurable environments. This leads to smaller memory, more flexibility, more reconfiguration ability, better concurrency, and multiple data channel support.

Component-Based Software Trustworthiness Fuzzy Analytic Hierarchy Process Model

For a more accurate and comprehensive assessment of the trustworthiness of component-based soft- ware system, the fuzzy analytic hierarchy process is introduced to establish the analysis model. Combine qualitative and quantitative analyses, the impacts to overall trustworthiness by the different types of components are distinguished. Considering the coupling relationship between components, dividing the system into several layers from target layer to scheme layer, evaluating the scheme advantages disadvantages by group decision-making, the trustworthiness of a typical J2EE structured component-based software is assessed. The trustworthiness asses model of the software components provides an effective methods of operation.

Component-based software reliability analysis incorporating imperfect debugging and change-point

Against the deficiencies of component-based software(CBS) reliability modeling and analysis,for instance,importing too many assumptions,paying less attention to debugging process without considering imperfect debugging and change-point(CP) problems adequately,an approach of CBS reliability process analysis is proposed which incorporates the imperfect debugging and CP.First,perfect/imperfect debugging and CP are reviewed.Based on the queuing theory,a multi-queue multichannel and infinite server queuing model(MMISQM) is presented to sketch the integration test process of CBS.Meanwhile,considering the effects of imperfect debugging and CP,expressions for fault detection and correction are derived based on MMISQM.Numerical results demonstrate that the proposed model can sketch the integration test process of CBS with preferable performance which outperforms other models.

A software reliability growth model for component-based software incorporating debugging delay and imperfect debugging

In view of the problems and the weaknesses of component-based software （ CBS ） reliability modeling and analysis, and a lack of consideration for real debugging circumstance of integration tes- ting, a CBS reliability process analysis model is proposed incorporating debugging time delay, im- perfect debugging and limited debugging resources. CBS integration testing is formulated as a multi- queue muhichannel and finite server queuing model （MMFSQM） to illustrate fault detection process （FDP） and fault correction process （FCP）. A unified FCP is sketched, given debugging delay, the diversities of faults processing and the limitations of debugging resources. Furthermore, the impacts of imperfect debugging on fault detection and correction are explicitly elaborated, and the expres- sions of the cumulative number of fault detected and corrected are illustrated. Finally, the results of numerical experiments verify the effectiveness and rationality of the proposed model. By comparison, the proposed model is superior to the other models. The proposed model is closer to real CBS testing process and facilitates software engineer＇ s quantitatively analyzing, measuring and predicting CBS reliability. K

A component-based back-propagation reliability model with low complexity for complex software systems

Since most of the available component-based software reliability models consume high computational cost and suffer from the evaluating complexity for the software system with complex structures,a component-based back-propagation reliability model(CBPRM)with low complexity for the complex software system reliability evaluation is presented in this paper.The proposed model is based on the artificial neural networks and the component reliability sensitivity analyses.These analyses are performed dynamically and assigned to the neurons to optimize the reliability evaluation.CBPRM has a linear increasing complexity and outperforms the state-based and the path-based reliability models.Another advantage of CBPRM over others is its robustness.CBPRM depends on the component reliabilities and the correlative sensitivities,which are independent from the software system structure.Based on the theory analysis and experiment results,it shows that the complexity of CBPRM is evidently lower than the contrast models and the reliability evaluating accuracy is acceptable when the software system structure is complex.

Reliability Evaluation Optimal Selection Model of Component-Based System

If the components in a component-based software system come from different sources, the characteristics of the components may be different. Therefore, evaluating the reliability of a component-based system with a fixed model for all components will not be reasonable. To solve this problem, this paper combines a single reliability growth model with an architecture-based reliability model, and proposes an optimal selecting approach. First, the most appropriate model of each component is selected according to the historical reliability data of the component, so that the evaluation deviation is the smallest. Then, system reliability is evaluated according to both the relationships among components and the using frequency of each component. As the approach takes into account the historical data and the using frequency of each component, the evaluation and prediction results are more accurate than those of using a single model.

Testing Component-Based Software: What It has to do with Design and Component Selection

In a component-based software development life cycle, selection of preexisting components is an important task. Every component that has to be reused has an associated risk of failure of not meeting the functional and non-functional requirements. A component's failure would lead a developer to look for some other alternative of combinations of COTS, in-house and engineered components among possible candidate combinations. This means design itself can readily change. The very process of design of a software system and component selection seems to be heavily dependent on testing results. Instability of design, further, becomes more severe due to requirements change requests. Therefore, this instability of design has to be essentially mitigated by using proper design and testing approaches, otherwise, it may lead to exorbitantly high testing cost due to the repeated testing of various alternatives. How these three activities: Component-based software design, component selection and component-based software testing are interrelated? What process model is most suited to address this concern? This work explores the above questions and their implication in terms of nature of a process model that can be convincing in case of component-based software development.

基于自主可控的CAPP云架构钢铁工业软件应用开发研究

随着科学技术的持续进步,钢铁行业逐渐进步与发展。在数字化背景下,为保障钢铁行业的可持续发展,软件开发的重要性日益凸显,受到社会各界广泛关注。基于此,简单分析钢铁行业对自主可控系统的需求,并深入探究基于自主可控的CAPP云架构钢铁工业软件应用开发设计,具体涉及结构化工艺设计、零侵入式微服务架构、新型B/A/S架构等内容,以供业内人士参考。

CAPP系统在灌装机制造业的应用与思考

CAPP系统在装备制造业的应用日趋广泛,其与CAD/PDM/ERP等系统的有效集成,助力制造业高效、快捷的发展。本文结合CAPP系统在灌装机制造领域的应用,分析了CAPP在实际应用中的效果及应用中存在的问题与不足,并对未来趋势进行了思索。

基于Web的CAPP若干关键技术

简述基于 Web和数据库的 CAPP的必要性 ,介绍这种 CAPP的体系结构、功能和特点 ,论述以产品结构树为核心的用户化工艺文件信息模型、工艺文件的表达、基于 Web的 CAPP与 PDM之间的关系、基于 Web的工艺文件模板定义、CAPP与 MRP /ERP之间的信息集成、面向产品或BOM的工艺设计方法。

基于PDM的CAPP体系结构研究

产品数据管理技术是企业重构和发展的一项必不可少的重大基础结构技术。本文分析了ＣＡＰＰ与ＰＤＭ软件的三种集成方式，给出了基于ＰＤＭ软件的ＣＡＰＰ体系结构。

面向并行工程的CAPP框架系统研究

提出能满足并行工程对ＣＡＰＰ的需求，并可以由用户定义信息模型、功能模型和决策逻辑的面向并行工程的ＣＡＰＰ框架系统。分析系统的功能需求，提出抽象信息模型和抽象功能模型等概念。阐述系统的总体方案，说明以抽象信息模型和抽象功能模型为基础，内部过程的管理与控制、实例化配置的解释与执行和以决策支持系统为核心的系统体系结构。讨论实现系统的信息元法。给出通过实例化ＣＡＰＰ框架系统ＴＨＣＡＰＰ－ＳＨＥＬＬ形成的实用系统ＴＨＣＡＰＰ－ＣＥ在并行工程下的运行模式。

城市空气污染数值预报系统CAPPS及其应用

城市空气污染数值预报系统CAPPS ,是在ADPIC的概念的基础上经过积分求得的大气平流扩散的多尺度箱格预报模型。它不需要污染源的源强资料就可预报出城市空气污染潜势指数 (PPI)和污染指数 (API) ,克服了由污染源调查本身具有的不确定性给城市空气污染的数值预报所带来的困难。该文对CAPPS系统在北京市和上海市进行数值预报的结果进行了分析检验 ,并与国际上几种光化学污染预报模式的预报结果进行比较。结果表明 ,就预报值与监测值的线性相关系数来说 ,CAPPS系统的预报水平与其他发达国家的模式预报水平相当。此外 ,CAPPS系统的污染指数等级预报准确率 (北京市和上海市 )平均达到61 .5%。

面向CAD/CAPP集成的零件特征组合描述及其应用

在分析目前依靠单特征进行工艺推理不足的基础上 ,从工艺推理角度把组成零件的一些单特征按照加工要求重构 ,由此引出特征组合的概念 ;分析零件中可能出现的特征组合的类型并对其进行描述 ,指出从 CAD模型中提取和识别这些描述的可行方法 ,由此实现 CAD与 CAPP的集成 ;讨论特征组合对工艺推理的影响 ,这种从工艺角度描述特征的方法有利于提高工艺推理的精度 .最后以实例说明特征组合描述在

CAPP 专家系统中工艺决策的实现

结合杭州叉车总厂ＨＣ—ＣＡＰＰ工程应用项目，构造了一种基于知识推理的创成式ＣＡＰＰ专家系统模型。原型系统中，工艺设计、机床选择、刀具选择、夹具等知识库的管理独立于推理机，不仅为知识库管理、推理机改进、零件特征排序、知识库系统移植等提供方便，而且系统采用ＲＤＢ（关系型数据库管理）技术、ＯＤＢＣ（开放式数据库互连）技术，为ＣＡＰＰ、ＣＡＤ、ＮＣＰ（数控编程）子系统内部不同模式数据交换提供接口。

CAPP与车间作业计划集成的研究

阐述在制造过程中CAPP与车间作业计划之间集成的必要性，分析目前CAPP与车间作业计划集成的方法：在分布式集成方法的基础上，提出分层规划集成的模型，并讨论此模型的系统结构和特点。

用信息元法构造CAPP系统框架

讨论ＣＡＰＰ系统通用化存在的困难，认为应建造实现通用机制的ＣＡＰＰ系统框架，提出一种实现系统框架的信息建模和系统开发的新方法——信息元法，初步探讨信息元法的基本理论、应用方法和优缺点。讨论ＣＡＰＰ系统框架的关键技术，提出用信息元法开发ＣＡＰＰ系统框架的一种方案，并介绍ＣＡＰＰ系统框架的实例ＴＨＣＡＰＰ－ＳＨＥＬＬ。