抽象泛函微分方程的最大解和最小解

本文利用增算子不动点定理讨论了抽象泛函微分方程的最大解和最小解,得到了迭代公式,并把结果应用于偏泛函微分方程。     

高职院校科技期刊英文摘要存在的问题及改进

为了提高高职院校科技期刊的办刊质量,本文就目前高职院校科技期刊的英文摘要中普遍存在的几个问题进行了分析,并提出了改进意见。     

二阶线性非齐次抽象微分方程的Cauchy问题

本文利用半群理论证明了二阶线性非齐次抽象微分方程的 Caucby 问题解的存在唯一性,并且得到了解的积分表达式.     

异构数据的管理方法及异构数据源的集成研究

工程应用中软件工具的多样性和设计活动的分散性形成了大量异构数据。本文分析了传统的异构数据管理方法的不足，提出使用数据库系统的文件系统结合的管理方法。针对此方法下所形成的异构数据源问题，给出了基于J2EE规范的数据访问对象抽象工厂解决方案。     

四甘醇的生产与应用

介绍了利用乙二醇生产装置的廉价副产物二甘醇为原料,生产四甘醇的国内外状况;阐述了四甘醇作为芳烃抽提溶剂在国内外的应用状况和市场情况;简略介绍了上海石化研究院开发的以二甘醇为原料生产四甘醇的合成和分离新技术,以及用此技术在苏州东山精化技术公司建成的年产 200 t四甘醇生产装置的运行结果。     

气液联合冲击器参数优化设计

分析了液压冲击器冲击机构的控制形式,得出气液联合冲击器采用后腔控制式的结构比较合理。经理论分析与计算表明，在多档冲击器的某一档上确定的最优抽象设计变量α，在其它各档上也同样适合。以此为基础得出了冲击活塞系统的基本参数设计计算公式，并以液压冲击器供油峰值流量最小为优化设计目标，进行了优化设计，求得了抽象设计变量最优值αu。     

装饰绘画教学中的造型语言

装饰绘画教学中的造型语言训练 ,表现为具象形和抽象形两大类别。具象形造型侧重表现概括夸张 ,移位重构 ,适形造型 ,形的平面化等内容。抽象形造型由偶然性造型和构成性抽象型两方面组成     

Views and Patterns in E-Commerce Application Design

Separation of concerns is a well-established principle in software engineering that supports reuse by hiding complexity through abstraction mechanisms. The Abstract Design Views model was created with reuse in mind and allows the designer to apply separation of concerns in a software system from the design to the implementation. In this model, viewed objects represent the basic concern, i.e., the algorithms that provide the essential functionality relevant to an application domain, and viewer objects represent the special concerns related to other software issues, such as user interface presentation, synchronization, and timing. In this paper we use a reuse taxonomy to analyze and validate this model. Using this analysis and the properties of the relationship between viewer and viewed objects, called views, we also indicate how to map the views-based designs into implementations based on design patterns that satisfy the views properties. Finally, we show how to apply the principles of our approach, using views and the design patterns, to design e-commerce applications.     

Computing Machines Can't Be Intelligent (...and Turing Said So)

According to the conventional wisdom, Turing (1950) said that computing machines can be intelligent. I don't believe it. I think that what Turing really said was that computing machines –- computers limited to computing –- can only fake intelligence. If we want computers to become genuinelyintelligent, we will have to give them enough initiative (Turing, 1948, p. 21) to do more than compute. In this paper, I want to try to develop this idea. I want to explain how giving computers more ``initiative' can allow them to do more than compute. And I want to say why I believe (and believe that Turing believed) that they will have to go beyond computation before they can become genuinely intelligent.     

浅谈面向对象程序设计的思维方法

面向对象的思维方法,其实是一个把业务逻辑从具体的编程技术当中抽象出来的过程,而这个抽象的过程是自上而下的,先不考虑问题解决的细节,把问题的最主要的方面抽象成为一个简单的框架,集中精力思考如何解决主要矛盾,然后在解决问题的过程中,再把问题的细节分割成一个一个小问题,再专门去解决细节问题。