基于数据挖掘的智能答疑系统

根据当今答疑系统的缺点,提出了一套基于数据挖掘算法的答疑设计方案,将改进的关联规则算法应用于文本聚类中,可以将数据库中问题更加准确地分类,因此可以将用户提出的问题快速定位,提高答疑速率.将聚类后的问题库应用关联规则,可以得到更加准确的关联表,用于提取论坛数据库中的最优答案,进而形成一个快速且准确的自动答疑系统.实验结果表明该方案具有智能性、自我更新性能、节约存储空间和提高答疑效率等优点.     

中文智能答疑系统相关技术的研究与实现

针对目前答疑系统的现状和不足,提出了一套基于数据挖掘算法的答疑设计方案,将改进的关联规则算法应用于文本聚类中,结合J2EE技术在系统开发上的优势,应用JSP、Servlets、EJB以及JDBC等技术形成一个快速准确的智能答疑系统。     

模糊贴近度在智能答疑系统中的应用

智能答疑是现代远程教育中一个重要组成部分,但目前网络答疑系统反馈答案的查出率和准确率较低.文章在分析用户问题与标准问题语句的模糊贴近度的基础上,提出了基于阈值的模糊贴近度算法.通过对系统运行情况的分析,证实了该算法能有效地提高答疑系统的智能处理能力.     

基于问题模式匹配的智能答疑系统原型

智能答疑系统是将学生的问题和老师的解答有机地组织起来并存放至相应的答题库中,通过自然语言的语义理解技术来分析并自动的匹配学生所提出的问题,自动地给予问题解答的系统. 智能答疑系统能够给予提问者即时的回应,减轻教学人员的工作压力,在远程教学中具有重要意义.红棉智能答疑系统（原型系统）针对国内现有的智能答疑系统普遍存在的问题,借鉴了国外先进智能答疑系统的成功经验与设计理念,根据中文智能答疑的特殊需求,引入了基于概率的双向最大匹配分词算法、智能问题模式匹配、基于语义依存树的语义分析等技术进行智能问题分析,形成了具有更高答案召回率、合理性与正确性的新一代智能答疑系统.     

基于动态隧道系统的K-means聚类算法研究

针对K-means聚类算法易陷入局部极小的问题,利用动态隧道算法在解决全局最优化问题中的有效性,将算法中的动态隧道过程引入到K-means聚类算法中,提出了一种基于动态隧道算法的K-means聚类算法.该算法在K-means聚类算法寻优得到的局部极小值基础上,利用动态隧道过程寻找更小的能量盆地,再将其值提交给K-means聚类算法进行迭代寻优,重复该过程,直到找到全局最小值.理论分析和仿真实验证明,该算法的聚类效果要优于K-means聚类算法.     

智能答疑系统的研究与实现

根据国内外现有的智能答疑系统存在的问题,本文提出了支持自然语言提问的智能答疑系统模型,当用户提出问题时,系统利用相关技术自动理解用户输入的自然语言文本,并与数据库信息进行匹配,返回一组与问题相关的答案,并形成反馈,同时本文将改进文本分类算法应用于答疑系统中,准确快速的对数据库问题进行分类,可以将用户提出的问题快速定位,提高答疑效率。     

基于用户特征和评分的精准推荐策略研究

个性化推荐系统是帮助用户发现内容,克服信息过载的重要工具.为了提高推荐算法的准确率和效率,综合协同过滤推荐算法和K-means聚类算法,设计了一种基于用户特征和评分的精准推荐策略.该策略一方面针对新用户冷启动问题,引入K-means聚类算法对全体用户特征进行聚类,将新用户所属类中其他用户喜好的物品中的Top N个推荐给...     

基于智能聚类的内容分类方法与应用

直接依靠人的理解判断对内容进行分类,需花费大量的时间与精力,为了解决文本内容的自动聚类问题,该文在信息系统理论与自组织神经网络理论的指导下,利用智能技术得出了内容的分类结构。提出了基于智能聚类的内容分类方法,利用自组织神经网络的学习算法进行内容的聚类,并根据所提出的方法设计了基于智能聚类的内容分类示范系统,进行了应用研究,验证了该方法的有效性。     

智能优化算法在聚类分析中的应用

聚类是数据挖掘领域中的一个重要研究课题,聚类分析应用广泛,既能作为一个独立的工具来进行数据分析,也可以作为其他算法的预处理步骤.本文介绍了智能优化算法在聚类分析中的应用,着重分析了基于蚁群算法的聚类算法和基于微粒群算法的聚类算法.     

智能化远程学习模型

利用智能化技术实现有效的个性化学习是远程教育中的重要问题。该文对现有远程学习系统中智能化所需要解决的问题进行了分析。针对目前远程学习模型可实现性差的问题 ,从两个层次上加以解决 :在课件学习模型问题上 ,提出一个反映知识模块间关系的知识混合结构模型 ,及相应的智能指导和智能答疑算法 ;在软件实现层次上 ,利用软件代理和多代理技术实现智能课件、智能学习指导和智能答疑3个功能。该模型通过一个实验系统加以验证。结果表明 :基于知识混合结构和软件代理技术的智能化学习模型是一个实用的远程学习智能化方案     

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