CAI在大学英语教学中的应用研究

语言学和外语教学法研究的深入和计算机多媒体技术和网络技术的发展为现代教育技术在大学英语教学中的应用提供了充分的理论基础和客观条件。计算机辅助教学（CAI）主要有单机辅助教学和网络教学两种形式。本文主要研究这两种形式各自的技术特点、研究现状和应用条件，并着重探讨了网络教学中教师的网上合作、网络资源的共享和远程教育模式。研究表明，计算机辅助教学将在大学英语教学中起到越来越重要的作用。     

浅谈多媒体教学在大学英语课堂中的应用

随着计算机辅助语言教学的实际应用,多媒体作为课堂教学的一种新型手段越来越多地被应用于英语教学中。本文阐述了多媒体技术在大学英语教学中的优点和缺点,旨在为大学多媒体英语教学提供教学参考,提高大学英语教学效果。     

论多媒体网络环境下的大学英语教学

随着教育技术的迅猛发展，基于认知科学的计算机辅助外语教学的理论研究与实践也取得了重大进展，多媒体网络教学是夫学英语教学发展的方向。本文重点探讨在这一教学过程中，学生和教师的角色的转变以及如何在大学英语教学中正确使用多媒体网络。     

网络环境下的互动英语教学探讨

随着计算机科学在各个方面的广泛应用,多媒体计算机辅助教学正以也涌入了大学英语课堂。基于网络的教学活动不断增强,如何充分发挥网络技术的优势、开展大学英语网络教学是当前大学英语教学改革的课题。教学技术和教学手段发生了根本的变革,教师的作用或角色也发生了变化。本文结合大学英语网络教学的特点,论述了建设网络平台的重要性,探讨了在普通高等院校开展多媒体网络环境下的互动英语教学的有效途径和方法。     

计算机辅助英语教学与大学英语教师角色的转变

随着信息全球化和网络技术日新月异的变化,计算机辅助英语教学成为大学英语教学的新模式。与此同时,以学生为中心,培养独立自主的学习者的教学理念日益受到教育者的重视。本文分析了计算机辅助英语教学具有的优势,及其带来的师生角色的新变化并重点探讨了对外语教师教学过程中的影响。     

借助多媒体资源,强化大学英语听说教学

提高交际能力是英语教学的一个重要环节。根据教育部的《大学英语教学课程要求》,明确提出培养学生的综合应用能力,特别是听说能力。这就需要教师转变旧的教学观念和手法来推动教学改革,特别是英语教学中听说教学,构建网络和计算机的大学英语教学体系和培养学生的综合运用能力。本文浅析了如何借助计算机辅助语言的应用、优秀的听说教材在听说教学的作用,提出科学而合理地选择多媒体资源能够促进学生跨文化交际能力的提高。     

多媒体英语教学的优势与课件制作

近年来随着大学英语教学改革的深入,计算机多媒体辅助英语课堂教学越来越受到关注与重视。从计算机辅助外语教学的课堂优势,多媒体教学课件的制作两个方面,分析研究运用计算机辅助英语教学能取得其它教学手段所无法取得的效果。     

网络课程在大学英语教学中的运用

网络教学是外语教学发展的方向,计算机网络技术的发展为网络课程运用于大学英语教学提供了良好的平台。本文通过阐述网络课程的定义以及其教学设计的理论依据,着重探讨了网络课程的教学模式以及在大学英语教学中如何通过网络课程的有效利用来构建英语学习环境,促进大学英语教学的改革。     

基于网络语料库的大学生英语自主学习

随着当前社会信息化、网络化技术的发展,给大学英语教学课程改革也带来了新的教学手段和方法。大学英语教学中网络语料库的应用改变了传统大学英语教学模式,使其成为有潜力和多元化的教学模式。本文在借鉴前人的经验上,主要探讨了基于网络语料库的大学英语自主学习的必要性,操作性及在该教学过程中应该注意的一些问题。     

大学英语网络教学实施的挑战与对策

在大学英语教学中,融入网络技术可以有效提高教学质量。教师要明确教学理念,灵活采用网络技术才能促进教学更上一层楼。本文主要分析大学英语网络教学实施面临的挑战,然后进一步探讨了大学英语网络教学实施的途径。随着信息技术的不断发展,大学英语教学亦在不断变化。为了实现对人才的培养,要将网络与大学英语教学相结合,这样就可以有效改进现有的教学模式,实现网络英语教学。在实际应用中,大学英语与网络相结合还存在一定的困难,这就需要采取有效的对策实现大学英语网络教学。     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-