一种面向对象推理模型及其知识表示

在面向对象的语言环境下 ,分析设计了一个以产生式为基础、将谓词逻辑与过程表达相结合的通用推理模型 (RBIM)。模型以面向对象的知识表示为基础 ,将命题对象、谓词对象和过程对象作为规则的基本组成元素 ,能提供良好的知识表示接口。     

制药工程专业《药剂学》课程KM教学法研究

文章针对《药剂学》课程教学中存在的问题,提出将KM教学法应用于该课程中,将其知识内容逻辑结构化,经过“薄———厚———薄”的教学过程,促使学生深入理解和掌握知识,达到高效的教学目的。实践表明,该教学方法提高了学生的学习效率和创新能力。     

基于类的面向对象的知识模型表达模式

在研究化学工业企业知识内涵的基础上,提出化学工业企业知识管理的体系结构。研究基于类的面向对象的知识模型框架表达模式,形成由模型类、模型模板和模型实例构成的继承层次。还提出由过程模拟和数据挖掘为重要方法的知识发布模式。通过实例对上述模型体系进行应用研究。     

基于应用型人才培养的化工原理教学方法探讨

《化工原理》是化工及化工类相近专业的一门重要的技术基础课,它起着由基础课向专业课过渡的"桥梁"作用。根据化工原理的特点及应用型学生的基础和培养目标,本文从教学内容、教学方法和教学手段等方面对化工原理教学进行了探讨,紧密结合生活生产实例强化教学,充分激发学生的求知欲望,提高学生的综合素质和创新能力。     

基于先验知识的前馈网络对原油实沸点蒸馏曲线的仿真

将先验知识与神经元网络相结合，可以提高模型的拟合精度和预测能力。本文将针对三层前馈网与单调性先验知识相结合的问题，分析Joerding的惩罚函数法，提出两种新方法：插值点法和有约束优化方法，并成功地应用于原油实沸点蒸馏曲线的仿真，使网络模型在整体和局部上都更贴近于实际对象。     

制药专业立体互动教学模式的应用探索

文章探索了立体互动教学模式,从视觉、听觉、触觉和意识上对学生实现立体唤醒,采用实物演示、动画演示、仿真模拟、音像演示和生产见习5种方式,通过准备素材、调整教学方式、分组讨论和改变考核办法的过程实施,从综合知识、制备原理、工艺方法、质量控制、设计能力5个方面对学习效果进行评价。该互动教学明显提高了学生对制药课程知识掌握程度和创新能力,为制药专业课程教学和创新人才培养提供了一种新的模式。     

Buoyancy effects on objects moving in a bubbling fluidized bed

The effect of buoyant forces on the motion of a large object immersed in a bubbling fluidized bed (BFB) was experimentally studied using digital image analysis. The experiments were performed in a 2-D bubbling fluidized bed with glass spheres as bed material and cylindrical objects with different densities and sizes. The object motion was measured using non-intrusive tracking techniques. The effect of gas velocity was also analyzed.The circulation of an object in a BFB is defined by several parameters. The object might be able to circulate homogeneously throughout the bed or stay in preferred regions, such as the splash zone or the bottom zone. While circulating, the object moves back and forth between the surface of the bed and the inner regions, performing a series of cycles. Each cycle is composed by sinking and rising paths, which can be one or several, depending on whether a passing bubble is able to lift the object to the surface or the object is detached from it or its drift at an intermediate depth. Therefore, the number of rising paths or number of jumps that the object undergo in a cycle, interleaved with sinking paths, and the maximum attained depth characterize each cycle, together with the mean sinking and rising velocities of the object. In this work, experimental measurements of the probability distributions of the number of jumps and the maximum attained depth, the axial homogeneity of object motion and rising and sinking object velocities are presented for objects with different sizes and densities. The results show a coherent behavior, independent of density and size, for the probability distributions of the number of jumps. This is also true for the maximum attained depth, but only when a proper circulation throughout the bed is ensured. Such a proper circulation and axial homogeneity is, on the other hand, much affected by object density, size and gas velocity. Rising and sinking velocities are highly dependent on gas velocity, as established in well-known models of bubble and dense phase velocities. Nevertheless, rising velocities are practically unaffected by object density or size, while sinking velocities show a low dependence on density and a steeper one on size. These results suggest that buoyant forces are relevant during the sinking process, and almost neutral during the rising path.     

针对非化学化工类大一新生的《普通化学》教学初探

《普通化学》是高等工科院校面向非化学化工类学生的一门公共基础课,其内容涵盖＂四大化学＂,知识点多、内容庞杂、概念跨越度大,教学课时少,授课对象为只有中学化学基础的大一新生。文章通过对授课对象、存在的问题等进行深入分析,提出了针对大一新生的特点、针对学生专业特点、针对《普通化学》课程特点的针对性教学方法,介绍了作者在一线教学过程中的一些实际教学案例。     

Prototyp eines wissensbasierten Programmsystems für die Systemsimulation

Prototype of a Knowledge-Based Program System for System Simulation. The present article describes a new approach for merging numeric simulation techniques and knowledge-based methods for process simulation. In a first step the potential of such a combined technology is outlined, concerning both knowledge-based user support in handling and application of simulation codes as well as the support of the engineering task for chemical process development. An analysis of implementation techniques outlines, how an adequate integration of numeric and knowledge-based software modules can be achieved by adoption of the object oriented programming paradigm. The resulting requirements for the modelling of knowledge and the corresponding inference mechanisms are explained and a software prototype is presented by which this knowledge-based simulation technology is currently being evaluated and refined using a case study from aerospace domain.     

The Society of Dyers and Colourists

The Society of Dyers and Colourists was founded in Bradford in 1884, with the object of promoting scientific and technical knowledge among textile colourists and the general advancement of the interests of the tinctorial and allied industries, excluding all questions connected with wages and trade regulations.     

The Society of Dyers and Colourists

The Society of Dyers and Colourists was founded in Bradford in 1884, with the object of promoting scientific and technical knowledge among textile colourists and the general advancement of the interests of the tinctorial and allied industries, excluding all questions connected with wages and trade regulations.     

The Society of Dyers and Colourists

The Society of Dyers and Colourists was founded in Bradford in 1884, with the object of promoting scientific and technical knowledge among textile colourists and the general advancement of the interests of the tinctorial and allied industries, excluding all questions connected with wages and trade regulations.     

基于知识管理的精馏塔智能化控制模型

为解决多变操作环境下精馏塔在线控制调优问题,分析了精馏塔传统的控制策略与缺陷,提出精馏塔基于知识管理的智能化控制框架.框架引入知识管理体系结构,解决了模型构建、表述、引用等更适应于工程化应用的信息化处理技术,采用单神经元自适应控制策略,确定不同条件下动态优化的馏出物组成,进而确定各控制点的控制参数.并研究精馏塔知识管理的模型表达方式,在面向对象建模方法基础上,采用面向智能体的建模方法,建立了客体(对象)类、主动实体(智能体)类和最优化模型类,通过知识推理将三个类关联形成精馏塔管控一体化的知识化智能平台,其中知识推理采用了基于人工神经网络的数据挖掘技术.实际应用证明该体系结构是可行的.     

Acceptance of yoghurt with different functional ingredients among consumers in supermarkets in southern Chile

In view of the interest in the role of foodstuffs in improving wellbeing and health, the object of this study is to distinguish consumer typologies in Temuco, La Araucanía Region, Chile, according to their preferences for different functional ingredients, flavouring, colouring and price in yoghurt. A semi-structured survey was applied to 400 supermarket customers. The respondents ordered eight alternative yoghurts according to their preferences, with different functional ingredients (fibre, antioxidants), flavourings (sugar, sweetener), colouring (natural, artificial) and three price options, for a conjoint analysis with fractional factorial design. Variables affecting knowledge of "functional food" were evaluated using a binomial logit model. It was determined by conjoint analysis that in general a preference existed for yoghurt containing fibre, sweetener, natural colouring, and at the lowest price. Three typologies were distinguished by analysis of hierarchical conglomerates: the majority segment (48.8%) displayed a greater preference for fibre; the second (41.7%) also preferred fibre, but gave first priority to artificial colouring and preferred a higher price. The minority (9.5%) was the only segment to prefer antioxidants. The typologies differed significantly in satisfaction with their food-related life, knowledge of the function of fibre and presence of cancer and obesity in some member of the respondent's family. The binomial logit model was significant (P < 0.01), indicating that if the consumer has a job or has had access to information on functional foods, the probability increased of knowledge of what these mean. There was thus majority acceptance of yoghurt enriched with fibre and with added sweetener.     

基于本体的石化行业知识抽取方法

为解决目前企业中信息共享和集成过程中的知识抽取问题,根据本体的体系结构提出了一种符合本体规则的企业知识抽取的方法,即结合面向对象分析方法、数据流图分析方法和物料流图分析方法构建石化企业的本体库,应用模糊聚类的方法对其进行准确性检验.由于本体具有清晰的表达语法和继承规则,这种方法对于企业知识的抽取具有明显优势.     

Extensional flow of non-newtonian fluids—A review

Extensional flows have been the object of study in several laboratories in recent years. Polymeric systems have been studied in most cases because of their interesting behaviour and also because of the importance of their rheological properties to the plastics engineer. Controlled, steady elongation is more difficult to achieve in the laboratory than the more traditional viscometric flows. Moreover, it is not in general possible to predict the response of a viscoelastic material to steady extension based on knowledge of its viscometric functions. This review begins by presenting some useful expressions describing the kinematics of extensional flows. Then some results of interest from rational mechanics are presented and the behaviour predicted by a number of constitutive equations for viscoelastic fluids are discussed. After presenting the pertinent relations of linear viscoelasticity for extensional flows, experimental methods and results for steady simple extension are reviewed and some possible implications for the processing of molten polymers are discussed.     

Jens Weitkamp's Joy of Thinking

With the evocation of Jens Weitkamp's life and character this paper tackles from the psychoanalytic theory of Sublimation (Sublimierung) the nature of the specific pleasure taken by researchers. They realize passionately their own driving forces but thus indirectly contribute to culture and progress of humanity. Any sublimated drive to knowledge is based on the acceptance that knowledge always implies simultaneously a future knowledge to be. This specific pleasure is based not on sexual abstinence as stated by Freud but on the renunciation to a stable security, enjoying a mobile order instead of fixity. Nevertheless, the sublimatory derivation that ensures the transition from destructiveness to exploratory curiosity is conditioned by the ability of the researcher not to destroy the object but only its enigmatic character.     

塑料模具型腔数控加工过程优化设计

基于计算机辅助制造/计算机辅助设计技术,采用UG8.5软件,对塑料模具型腔数控加工过程进行了优化设计。对塑料模具型腔数控加工切削工艺环节上的各参数指标进行优化和完善,将其与传统的计算机辅助设计/计算机辅助工程技术结合,并且使用知识库中的计算推理,从而得到该加工系统中关于切削工艺的参数指标,最大化地提高塑料模具型腔数控的加工效率及产品质量。以塑料模具型腔数控加工切削工艺为研究对象,通过分析切削刀具的运动轨迹和模式,研究其轨迹从而得到算法,再结合数据和知识库,得到了一套关于塑料模具型腔切削加工工艺系统的优化和升级方案,从而为后续的研究应用提供相应的技术支持。     

工程塑料零件CAPP的研究与开发

以ＸＳＣＡＰＰ系统为例，试图说明如何利用计算机技术，成组技术，人工智能，知识工程，工艺理论学为基础，以计算机为工具，工程塑料加工为研究对象，以生成工艺过程文件为目标，采用专家系统的方法，研制开发工程塑料零件ＣＡＰＰ的方法。