基于多媒体题型的网络考试系统的设计和实现

阐述了目前网络考试系统的常用架构及其不足之处,分析了网络考试系统中的关键考试流程,提出了基于多媒体题型的网络考试系统的设计方法,重点分析了考试过程中的多媒体题型的试题数据处理、考试分段计时、二次登录续考以及防止考生作弊等问题的实现途径.该系统通过将考试过程中的远程交互转化为本地实时访问,减少了对网络带宽的占用,提高了系统的可靠性和响应速度.该系统在实践中得到了应用,为设计其他网络考试系统提供参考.     

基于Web的网络考试系统的数据库选择策略

基于Web的网络考试系统已逐渐成为一种全新的考试形式,而数据库则是整个网络考试系统的基础.从考试系统的稳定性和可靠性出发,对现在常用的几种数据库系统进行了细致的分析比较,对基于Web的网络考试系统的数据库选择策略进行了研究和探讨.     

基于网络环境下的无纸化考试系统的开发及应用

为了适应网络考试的发展趋势,提高考试的效率,笔者开发了基于网络的通用在线考试系统平台,本文分析了该考试系统的总体构架、特点及应用效果.本系统除了适用于任何课程的网上考试,还可用于学生平时做练习使用.     

基于网络的计算机考试系统的研究

概述了计算机网络考试系统优势,分析了基于网络的计算机考试系统的体系结构,在此基础上设计了基于网络的计算机考试系统的总体结构和主要功能模块,并阐明了对其中的关键性问题的解决思路.     

基于数据挖掘的网络考试智能评价反馈系统的研究与设计

针对网络考试中积累的大量有用考试信息如何处理等问题,结合考试评价中相关性能指标,设计了基于数据挖掘的网络考试智能评价反馈IAFS系统.该系统能智能地将学生考试数据和教师阅卷过程积累信息加以系统地收集、分析并提供深层次的教学诊断,从而形成相关考试的评价反馈意见等,其对网络考试具有较好监控、评价和反馈作用,具有较强的适用性和推广价值.     

一种网络考试系统的设计

无纸化考试系统从很大程度上节省了人力,节约了时间,提高了考试效率,减少了收发试卷的繁琐过程,使考试过程更加简单、快捷.介绍一种网络考试系统的设计方法.     

基于Web应用的网络考试系统

通过计算机网络考试系统,建立科学的教学评估体系.给出计算机网络考试系统的解决方案.     

WEB网络考试系统实现技术研究

介绍了基于Web技术的网络考试系统的设计与实现过程,并对使用ASP技术实现网络考试系统时安全性问题进行了讨论.     

全国高校计算机考试机试评分系统方案设计

随着计算机的日益普及、信息技术和计算机网络的迅速发展,利用信息技术和网络技术实现计算机无纸化、自动化考试势在必行.本文阐述了全国高校计算机等级考试一级机试考试评分系统的方案设计和实施过程方案.     

应用B/S结构的模块化网络教学系统设计

设计了一个模块化网络考试系统.该系统根据用户类型分为管理员模块、教师模块和学生模块,在功能上包括考试、答疑和教学评估等子系统.介绍了系统开发过程中所应用的关键技术.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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