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用的社会文化因素;心理学的分析方法则研究语篇的认知结构和建构策略,探讨特定的交际目的如何在特定语篇中予以实现。Bahtia[4](p22-36)认为在对任何一种体裁进行综合性分析时,应从以下7个方面着手: 1.确认某一情景语境中特定的体裁文本; 2.查阅已有的文献; 3.推敲文本产生的情景语境; 4.选择所要分析的语料;5.研究规约语境; 6.进行语言层面的分析; 7.征询专家的意见。Swales发现学术论文的作者在建构科研论文的导言时体现出很大的相似性。他在分析了48篇从物理学、生物学到社会学、语言学各种不同科目的论文引言后,总结了科学论文导言部分所包含的四语步结构(Research Space Model for Article Introductions)。后来经过修订以后,提出了CARS (creating a research space)模式[1](P141)。下面将通过一个包含此种结构的具体的例子来分析科研论文的导言。

　　(1) The thermal properties of glassy materials at low temperatures are still not completely understood .(2)The thermal conductivity has a plateau, which is usually in the range of 5 to 10k, and below this temperature it has a temperature dependence, which varies approximately atT2 .(3)The specific heat below4k is much larger than that which would be expected from the Dabye theory and it has an additional termwhich is proportional to T.(4)Some progress has beenmade towards understandingthe thermal behavior by assuming that there is a cut-off in the phonon spectrum at high frequencies (Zaitlin andAnderson 1975 a, b) and that there is an additional system of low-lying two level states (Anderson et al, 1972, Philips, 1972 ).(5 ) Nevertheless more experimental data are required and in particular itwould seemdesirable tomake experiments on glassy samples whose properties can be varied slightly fromone to the other.(6) The present investigation reports attempts to do this by using various samples of the same epoxy resin which have been subjected to different curing cycles .(7)Measurements of the specific heat (or the diffusivity) and the thermal conductivity have been taken in the temperature range 0·1 to 80k for a set for specimens which covered up tontine different curing cycles.根据CARS模式,上面语篇可分成以下三个典型语步:本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。