通信专业英语学生使用版本.pdf

第一讲: Lesson 1 Introduction to Electronic Communications 专业英语概述： A brief introduction for Specialized English 1.1 什么是专业英语？ (What) 公共英语: public English 专业英语: Specialized English 一段公共英语示例 An estate auction starting Monday in Paris is being described as the sale of the century, but is generating political waves after China demanded the return of a pair of bronze animal statues. We have more on the controversy surrounding the sale from the French capital. The auction taking place between February 25 and 27 involves a staggering collection of prized paintings, furniture, other cultural objects belonging to deceased French fashion designer Saint Laurent. 一段专业英语示例： Music style classification by mean of computers is very useful to music indexing, content-based music retrieval and other multimedia applications. This paper presents a new method for music style classification with a novel Bayesian-inference-based decision tree (BDT) model. A database of total 320 music staffs collected from CDs and the Internet is used for the experiment. For classification three features including the number of sharp octave (NSO), the number of simple meters (NSM), and the music playing speed (MPS) are extracted. Following that, a comparative evaluation between BDT and traditional decision tree (DT) model is carried out on the database. The results show that the classification accuracy rate of BDT is far superior to existing DT model. 参考译文： 用计算机实现音乐风格分类，对音乐索引、基于内容的音乐检索或其它多媒体应用等都非常 有用。本文提出一个新的基于贝叶斯推理的决策树(BDT) 模型，并用之进行音乐风格分类。 从 CD 和因特网上收集到 320 首乐谱构成一个乐谱数据库，用于分类实验。在分类时先提取 如下三个特征：乐谱中“升 8 度” 的个数（NSO ），乐谱中“节拍减半” 的个数（NSM ），乐谱 演奏速度（MPS ）；然后基于乐谱数据库比较 BDT 模型与传统的决策树（DT ）模型间的性 能。实验结果表明 BDT 的分类准确率优于DT 模型。 专业英语（科技英语）： 一种用英语来揭示客观外部世界的本质和规律的信息传递工具。 专业英语文体特点： 语言简练、结构严谨、逻辑性强、原理概念清楚、重点突出、段落章节分明、不带感情色彩。 有专业背景。 与公共英语不同之处： （1）词汇 （2 ）词法结构 （3 ）句法结构 专业英语“词汇”特点： ⑴ 大量使用专业词汇和