基于事例推理短期负荷预测方法的改进

针对基于事例推理（CBR）短期负荷预测中的事例库组织，提出第一级按不同的时刻和星期类型粗分类、第二级按照模糊聚类方法细分类的二级分类方法，可以很好地实现不同预测环境之间的相似性和相异性；针对事例的检索，提出模糊优先比的定量属性检索方法，按此方法进行检索不但可以提高检索效率，还可以对检索过程进行控制．实际算例表明，以此方法进行负荷预测的周平均相对误差为2．620%，低于一般的CBR方法和单一预测方法．     

基于事例推理的质量管理系统的研究与实现

将事例推理技术应用于质量管理过程中,可以高效地为管理人员解决问题提供决策支持.应用知识发现方法,基于事例检索过程,提出全新的质量管理模式.利用相似度和特征索引从事例中找出与当前问题相关的最佳事例,设计了质量问题事例库,并实现了质量管理系统.     

形式概念分析在基于事例推理中的应用

目的形式概念分析(Formal Concept Analysis,简称FCA)在基于事例推理(Case-basedReasoning,简称CBR)中的应用为完善领域知识的分类提供了一种有效的方法;FCA提供了一种事例的组织方式,使对事例库的直接访问变得容易。方法把原来的事例表示与组织方式转换成FCA所要求的形式。结果FCA可以提取嵌入在事例库中的隐含知识,这些以描述事例属性间的依赖规则形式的隐含知识可以用来帮助完成CBR的查询过程。结论FCA在CBR中的应用提高了事例检索的速度和结果的准确性。     

基于知识的铝型材挤压模具集成设计系统

提出了基于知识的铝型材挤压模具集成系统的框架，研究了事例推理技术(CBR)在铝型材挤压总体事例建模中的实现以及面向铝型材挤压成形过程的仿真方法．总结了集成知识模型中的几何处理技术，提出了基于CAD平台进行几何处理的基本原理并建立了相应的原型系统．     

故障诊断中事例推理的理论与方法

针对汽轮发电机组大型旋转机械故障诊断专家系统，提出了故障事例的表达模型与结构、事例推理中事例相似度的概念及相似度的度量准则，以及事例的学习策略，并在基于知识的泊轮发电机组故障诊断专家系统中获得应用     

基于事例推理的医学诊断专家系统

基于事例推理CBR(Case-basedReasoning)是一种问题学习和解决的推理方法,它的基本思想是通过参照过去的类似问题解决方法来解决现在所遇到的问题,这一过程与医学专家在看病过程中所采取的方法很相同.基于此,本文给出了一个基于事例推理的常见疾病诊断专家系统设计模型.     

电视机故障诊断专家系统的研究

从电视机故障诊断的特点和建立电视机故障诊断专家系统时遇到的问题这两个方面，介绍了基于事例的推理在电视机故障诊断中的应用，并讨论了这个专家系统中知识的表达和组织、知识的获取及推理策略     

故障诊断中事例推进的理论与方法

针对汽轮发电机组大型旋转机械故障诊断专家系统，提出了故障事例的表达模型与结构、事例推理中事例相似度的概念概念及相似度的度量准则、以及事例的学习策略在基于知识的汽轮发电机组故障诊断专家系统中获得应用。     

CBR系统优化策略及在注塑模具设计中的应用

CBR(Case-based reasoning)技术是弱理论强实践领域实现智能化的有效手段,但是,随着工业的飞速发展,工程领域的特征信息爆炸式增长使得当前CBR系统的关键构建环节例如事例的表达、事例库的构建等呈现出诸多局限。为了适应新的复杂工程领域发展需要,对若干关键环节进行了优化研究:在CBR系统事例的表达方面,利用GHSOM(Growing Hierarchical Self-Organizing Map)算法和粗糙集算法集成策略对事例庞大特征信息进行精简,为事例知识的准确、高效表达、存储和检索打下基础;利用GHSOM算法优化构建事例库,通过空间聚类建构多层次多粒度知识库体系,同时,当执行事例检索时,由GHSOM算法作为知识导引策略,将新任务导入相应子事例库,通过数值计算获取最佳事例。最后,以注塑模具设计为应用领域验证了本方案的效果。     

一种基于事例推理的检索模型

以计算逻辑为理论基础设计了１种对象检索模型以解决定理机器证明中的“同理可证”问题,该模型采用基于事例的推理方法来进行推理,并将领域知识、控制性知识与事例知识分别统一到对象类层次结构上,因此结构清晰,可重用性高     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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