一种快速的智能成卷算法

根据考试命题者的考试要求，以最小知识点为信息收集单位，提出了一套独特的收集题库资源的方法和选题风险的概念．首先，选取试题资源最少的指标分量，再从试题资源信息库中找出满足该指标分量的所有知识点，计算所有满足条件的试题的选题风险．找出风险最小的试题，直至满足考试要求为止．该算法具有速度快、成卷质量高的特点，为实现大规模网络化考试提供了一种很好的成卷方法．     

网络试题库智能成卷的研究

针对大学数学网络试题库系统的智能成卷过程，建立基于知识库支持和知识推理的成卷流程和数学模型，并将成卷流程划分为不同功能的模块，对实现成卷的智能化进行了较深入的探讨，成卷的结果分析表明成卷模型是可行的。     

基于AHP的高等数学课程考试试卷设计研究

本文基于层次分析法(AHP),结合教育测量理论,以青海师范大学第一学期高等数学考试命题工作为例,建立一种规范考试内容和知识结构的模型方法,并给出高等数学考试“双向细目表”,为教学管理以及考试命题工作提供一定的科学依据.     

提高高等数学教学质量的初探

本文在原有高等数学教学体会和经验的基础上,针对大学数学教学的特点,提出了一些改进的高等数学课堂讲授方法及考试方式,从而促进高等数学教学质量的提高。     

高等数学课程教学及考试方法改革探讨

通过博士课题的研究,对高等数学知识的应用以及高等数学的教学内容与方法有了重新的认识,深深体会到当前教学中存在的问题。于是针对高等数学抽象性、应用性强的特点,对教学内容和教学方法作了一些探索,同时提出了要想对课程教学进行改革必须同时对考试方式也进行改革。     

题库设计与成卷系统

探讨了题库设计过程中应该考虑的诸要素，给出了一个基于Ｆｏｘｐｒｏ平台的题库与成卷系统。该系统以本科高等数学的考试为背景，现有试题５００余道。就题库中的每道试题，引入了试题难度、区分度等主要量化指标。基于这一已有题库的试卷生成系统，可以交互方式依用户要求在题库中检索试题，并最终生成一张试卷。该系统可以保证试题选取的随机性和无重复性，试运行良好。     

推进剂配方设计专家系统知识体系设计

针对推进剂配方设计推理过程中知识难以转化、表示及管理这一问题,采用命题分层及多种知识表示形式结合的方法,构建了推进剂配方设计专家系统知识体系。通过对推进剂知识体系运用效果的分析,得出该知识体系能够有效地支持专家系统开展配方设计工作。     

成卷系统的研究与编码实例

成卷问题是考试系统中的精华部分,题库设计的合理与否固然重要,但成卷算法的优劣更关系到试题库系统性能的好坏。本文分析了考试系统中成卷的若干问题并给出相应的代码,详细地探讨了其设计思想与设计步骤。     

关于《精密机械设计》考试改革的几点思考

分析了我校《精密机械设计》课程现行考试方法存在的问题,针对命题和考试方式等提出了改革考试方法及建立试题库、实现考教分离的建议。     

复杂机械产品设计知识推理方法及软件系统

复杂机械产品设计涉及的领域知识广泛,类型复杂．基于实例的推理方法是知识推理中的一种重要方法。特别适用于复杂机械产品的设计知识推理．本文采用基于实例的推理方法,设计了复杂机械产品设计知识推理流程．在此基础上,提出一个快速实例检索流程,并给出了快速实例推理相似度计算方法．根据上述理论和方法,开发实现了一个复杂机械产品设计知识推理系统．     

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