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.     

认知视野下的教师称谓——以“园丁”为例

称谓是用来反映人们之间相互称呼的一套名称,而其中的职业称谓又可突出的反映一个社会的政治经济及文化背景。认知语言学是认知科学的一个分支,它是认知心理学与语言学相结合的一门新兴的交叉边缘学科。本文用认知语言学的相关理论对汉语教师职业称谓语＂园丁＂进行相应的解析。     

The Influence of Age in Learning a Foreign Language

Age is an important factor in foreign language learning. Different age groups have different characteristics. Knowing these characteristics may help the learners to increase their learning speed and achievement. This paper focuses on the similarities and differences of different age groups in learning a foreign language from physical, cognitive, affective, motivational and linguistic domains. Teachers can take corresponding methods in foreign language teaching in accordance with special characteristics of the age group being taught so as to obtain the best result in language classroom.     

浅析南阳市农村剩余劳动力转移的特点、存在的问题和对策

农村剩余劳动力的转移对区域经济增长的影响很大,解决好农村剩余劳动力就业问题,是加快农村经济发展,协调城乡关系的重要方面。本文针对南阳市近年来农村剩余劳动力转移存在的一些问题提出了发挥比较优势、规划转移战略、提升劳动力综合素质和完善配套制度改革等合理化建议。     

英、汉语篇思维模式差异及写作教学策略探讨

该文主要分析了英、汉语篇思维模式、组织结构的差异,着重说明汉语对英语写作产生的负迁移影响,同时提出在大学英语写作教学中可采取的教学模式和策略的建议。     

教育游戏“农场狂想曲2”中的学习迁移

教育仿真游戏是否对学生的迁移具有作用?本文采用个案法研究农场狂想曲2中学生的学习迁移,结果发现,有提示问题的个案发生了远迁移,迁移的知识层次达到了分析、综合和评价的高阶思维水平,而没有提示问题的个案即发生了近迁移或者没有迁移。     

海拉尔-塔木察格盆地南贝尔凹陷变换带特征

综合运用地质、地震、钻井等资料,结合南贝尔凹陷南屯组断层特征,对海拉尔-塔木察格盆地南贝尔凹陷变换带特征进行了系统分析,认为区内发育4个二级变换带和2个三级变换带,涵盖了相向型、背向型和同向型3大类型,通过横向凸起、斜向背斜、走向斜坡和地垒变换或传递着应变和位移,对物源方向和沉积体系产生控制和影响.变换带多是油气有利聚集区.     

An Analysis of Foreign Language Learning Styles from the Cognitive Perspective

From the 1970s,learning styles began to enter the domain of foreign language learning researches.Foreign language learning style is often regarded as a significant factor attributing to individual differences among language learners.Nowadays,many researchers begin studying individual learners’characteristics and exploring how different learners interact with external factors from cognitive perspective.The field-independence/dependence construct became a focus.Based on previous studies,the paper is committed to analyzing the nature of FID learners.It is expected that this research can establish a well-grounded basis for following studies.     

传递对准中基准信息时间延迟的估计与补偿

针对传递对准过程中基准信息时间延迟对传递对准精度的影响,给出了一种基于角速率积分最小方差曲线拟合的时间延迟估计方法.首先,记录一段时间内主、子惯导陀螺传感器的输出数据,并对该数据进行积分.然后,定义基准信息可能存在的时间延迟的最大范围,并在该范围内对主惯导数据进行逐点移位,计算曲线各对应点的差的平方并求和.最后,通过最...