Three dimensional couette flow and heat transfer through a porous medium with variable permeability

This paper reports research on the effects of variations in injection velocity and permeability on the heat transfer and flow through a highly porous medium between two horizontal parallel plates situated at constant distance with constant suction by the upper plate. Due to this type of variation in injection velocity and in permeability the flow becomes three dimensional. The governing equations are solved by adopting complex variable notations to obtain the expressions for the velocity and temperature field. The skin-friction along the main flow direction and rate of heat transfer are discussed with the help of graphs.     

Consolidation behavior of cement- and lime/cement-mixed column foundations

The consolidation behavior of mixed in place cement- and lime/cement-mixed column was studied. Consolidation of the composite foundation was modeled as a three-dimensional axi-symmetric problem. The authors used the finite difference method to obtain the pore pressure variation with time at any location below the surface. A computer program developed by the authors was used to draw some interesting conclusions about the consolidation behaviors of cement- and lime/cement-mixed pile foundation. Finally, a combined model including the permeability coefficients of cement-mixed piles and soil, was studied and its feasibility was evaluated. Project supported by National Natural Science Foundation of China (No. 59908012) and Education Ministry of China     

CeO2载体对Au/CeO2催化剂CO氧化活性的影响

采用六水硝酸铈和氢氧化钠为反应物,用水熟合成法制备了纳米Ce02.并以不同合成条件下得到的CeO2为栽体,担载了相同含量的贵金属Au,制备了具有高活性的Au/CeO2催化荆.实验结果发现,以CeO1-2h为载体的催化剂在高温区易展现出较好的活性,而以CeO2-10h为载体的催化剂在低温区易展现出较好的活性.说明载体结构对催化荆的CO催化氧化活性有决定性的作用.     

论高校思想政治教育网络平台的建设

随着信息技术的高速发展特别是互联网的日益普及,网络已经成为大学生求知、社交、娱乐的重要途径。高校的思想政治教育要根据这些新的变化,加强在方法、手段等方面的改革与创新,不断拓展思想政治教育的新领域,打造高校思想政治教育的网络平台,整合校内网络资源,使之形成合力,充分发挥高校思想政治教育网络平台的功能和作用,抢占思想政治教育的新阵地。     

Individual Learner Factors Affecting Second Language Acquisition

In Second Language Acquisition(short for SLA) research,the study of individual learner factors plays an important role.In this paper,discussion will be restricted to five general individual learner factors which have received the most attention in SLA research:age,cognitive style,personality,motivation and attitude.The research will,to some extent,not only develop the SLA theory,but also enhance learners’ judgments to their own individual learner factors.It can also shed light on the practical foreign language learning.     

Analysis on Chinese/English Code-Switching in Computer-Mediated Communication Based on Meme Theory

Nowadays,computer-mediated communication(CMC) becomes one of the most convenient ways for people to connect with each other in which Chinese/English code-switching has been frequently used and widely spread.The article will memeticly interpret this language phenomenon based on the authentic examples collected from various kinds of CMC,and point out that the Chinese/English code-switching in CMC is a kind of strong memeplex which includes many different strong memes,resulting in the popularity of Chinese/English code-switching in CMC.     

The Role of the ESP Teacher

The paper considers the role of the ESP (English for Specific Purposes) teacher, in particular, to consider in what ways the ESP teacher’s lot differs from that of the General English teacher. And finally it provides information about resources to help the ESP teacher.     

A Survey on English Learner Autonomy at Postgraduate Stage

Language competence is the ultimate goal of language learning.As the development of globalization,the task of improving learners’ English competence becomes even more urgent.Context Approach is first introduced,and learner autonomy is brought in as a context approach in the specified teaching environment concerned.On the basis of that,a small-scale survey is conducted to investigate the status of English learner autonomy among some students at postgraduate stage.     

远程教育学习支持服务满意度调查分析

远程教育机构关注的焦点在于学生的学。本研究把学习者的满意度作为学习支持服务的衡量标尺,从服务对象出发,展开学习支持服务满意度调查。结果表明,学习者对学习支持服务总体上呈现出比较满意的状态。专业对学生满意度影响较为显著;就地域来看,苏北、苏南区域差异变得不甚明显。研究者认为,必须根据学习者的需求,针对学习支持服务中存在的问题,更新理念,投入更多的人力与物力,为建设开放大学打下坚实基础。     

学习者元认知作用机制:面授与远程学习之比较

本研究重点探讨了面授学习者与远程学习者在元认知作用机制上的差异。首先通过文献研究建立起预设概念模型,分别向面授学习者和远程学习者发放调查问卷,共回收有效问卷424份,然后通过责任教师取得研究被试的课程成绩,使用结构方程模型多群组分析方法比较面授学习者与远程学习者的元认知活动对其学习成绩和学习效能感的作用和影响,最后提出对远程学习者进行元认知支持的策略。