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．     

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。     

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。     

课程试卷分析与通用试题库结构设计

通过对不同课程试卷的题型、难度等分析,针对它们的共性与个性,设计了课程库、教学大纲库和课程试题库,设计章表、知识点表、试卷难度分配表、试卷题型分配表、试题指标表等,作为通用试题库结构,存放各课程的教学要求和试题、试卷信息.为开发具有满足教学大纲和用户要求的自动组卷功能的通用试题库管理系统奠定基础.     

自适应试题库系统的设计与实现

提出了一个具有自适应性的试题模型ＳＡＩＬ,并基于该模型设计与实现了“数据结构与算法”课程的试题库系统．ＳＡＩＬ模型中的自适应性体现在测验可以自动适应被试者,在试题数量、难度、知识单元分布等方面根据不同学生的特点作调整;测验反馈信息又可进一步校准试题的属性并为优化试题库提供决策信息．这一试题库模型很容易推广到其他课程的试题库建设．     

智能组卷算法研究

文章在分析了试题库组织结构的基础上,提出了一种新型的智能组卷算法。算法通过对试题库中试题历史信息的充分利用以及对试卷难度和知识点分布的有效控制,有效地提高了组卷的效率和质量。     

智能组卷算法研究

文章在分析了试题库组织结构的基础上,提出了一种新型的智能组卷算法.算法通过对试题库中试题历史信息的充分利用以及对试卷难度和知识点分布的有效控制,有效地提高了组卷的效率和质量.     

对我校“画法几何学”试题库的定量评价

利用长期积累的大量教学和试卷材料对“画法几何学”题库的应用情况进行系统分析，从试题的难度与区分度、试卷的信度与效度以及试卷分数分布情况三个方面作出定量评价。结果认为，该试题库具有良好的应用效果。文中还对试卷分析和试题库应用提出了自己的观点。     

试题库的试题资源开发及相应计算机管理程序

试题是试题库的基本构成单位，要保证试题库中有较大的试题总量必须允许同一内容出具多题型多数量的试题。为了解决在试卷中不出现相同内容的试题需要在管理系统程序加以控制，本文介绍了在题号中设计知识点号和内容号利用题号各组成部分的含义在抽取试题的过程中分层次计算并排除相同题号记题的方法。     

计算机考试系统抽题算法的哈希函数描述

计算机考试系统广泛地应用于各种考试，其中抽题算法的优劣在某种程度上决定了考试系统的性能．本文运用数据结构中的“哈希函数”为模型表述了回溯抽题算法，分析了试题库的知识点模型和试题的冲突处理，对考试系统的设计有一定的理论指导意义．     

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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