类比推理在智能化概念设计中的应用

将类比推理的方法与基于实例的方法相结合，建立了基于多层推理的机械产品概念设计系统，即类比推理系统。知识的表示，采用面向应用的规则方法，框架式的知识结构，这样的系统具有自学习的能力，也可以由用户进行知识的更改和完善。     

知识基工艺设计专家系统

系统使用Visual Prolog语言，基于知识进行计算机辅助工艺设计。在系统中采用零件特征与加工特性相结合的方法描述零件；分层和分类收集存放知识，知识基与推理机分离，用户可以打开知识库根据要求修改知识；推理机制采用反向推理，进行合一算法自动生成工艺规程。     

测井实时控制专家系统

论述了专家系统在实时控制与模糊评判方面的应用。实时专家系统由元级控制和目标级控制组成。元级控制采用模糊知识，模糊推理及不精确推理完成模糊决策，模糊评判及对目标级控制的监控；目标级控制采用产生式规则与过程推理完成对信息的实时监控。该系统以友好的人机交互界面为用户提供灵活方便的数据输入／输出窗口，以实时曲线滚动方式显示及以分等级的声光极警窗口为用户提供音频及视频监控信息。此系统可用于实时测井，能完成对     

肺心病早期无创性诊断专家系统

用PROLOG实现的分类专家系统,着重介绍了知识的获取、知识库的结构及其推理机制。系统用产生式规则表示知识,采用正向推理策略,较准确地模拟了专家的施治过程。     

烧结过程异常状况诊断专家系统SPADES(Ⅱ) --关键技术

知识库构造和推理机设计是实现专家系统的关键技术.烧结过程异常诊断的知识具有模糊性、不确定性与因果性强,定性知识与定量知识并存的特点.采用模糊逻辑表达烧结过程信息的模糊特性,研究了表达烧结过程异常诊断知识的综合型知识表达方式.知识库的组织包括数据库、事实库、模型库和规则库.规则库中的规则根据用途不同分组存放,同组规则按优先级别排序,这样的知识组织方式为实现高效快速推理奠定了基础;SPADES系统的知识库具有管理与维护功能,知识学习采用专家指导学习方式;烧结过程异常诊断专家系统的推理机采用多级目标推理的混合推理机总体目标推理采用过程化推理,按异常类型判断、异常原因分析、操作决策顺序进行;烧结过程异常状况的诊断采用模糊诊断确定假定异常集合,再通过反向推理验证假定异常集合中的元素,确定出现的异常类型;异常原因分析和操作决策采用正向推理.对于本系统中模糊规则的模糊性传递问题,采用基于确定因子法的不精确推理策略,以及基于模糊规则的模糊匹配方法.SPADES系统在生产现场的应用结果证明了本系统知识表达方式和推理机可以实现模糊知识的表达和高效推理.     

水轮发电机组振动故障诊断专家系统

本文提出一个基于知识库和专家系统技术的水轮发电机组振动故障诊断与咨询的专家系统。本系统应用关于水轮发电机组振动、振动试验、频谱分析和运行管理人员现场经验的知识,采用推理方法作出诊断,采用产生式专家系统结构,设计出一个推理控制程序。该系统由知识库、算法程序库和诊断咨询程序三个主要部分组成。程序的实现采用MACLISP语言,可在IBM-PC计算机上运行。     

基于本体信息的知识管理系统的研究与开发

将本体论的思想引入知识管理系统中,设计了基于本体模型和关联规则的4层系统模型框架结构,提出了系统的功能模型,介绍了主要功能模块.本系统的设计和开发充分利用了知识内部和知识之间蕴含的关系,提高了查询的有效性,运用智能的推理机制实现了基于经验的隐式知识的管理.实际应用证明,本系统能够提高企业的工作效率,具有广阔的应用前景.     

基于规范知识的桥梁智能CAD系统

桥梁智能CAD是计算机技术与桥梁设计知识高度综合的结果。规范知识的表达和推理是CAD系统的一个重要部分。在桥梁CAD系统中规范知识表达和应用将直接影响知识存储，推理机制和用户的接口形式。     

六安市城北污水处理厂运行专家系统

六安市城北污水处理厂在世行技术援助专家的帮助下,开发了用于诊断城市污水处理厂日常运行故障的运行专家系统。系统采用了正反向混合推理机制,并采用故障树的形式将知识库中的知识组织形式向用户公开,便于用户使用和对系统的维护。     

催化剂分子设计专家系统推理机的设计

承接前文关于催化剂分子设计专家系统的数据库与知识库的建造．详细沦述了本系统推理机的设计与实现．针对特定催化领域的知识体系，初步建立起相应的推理机制，主要包括对合适的知识推理技术的采用和推理的搜索、控制策略的选择确定．     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has