编码在通信中的应用

本文论述了编码技术在通信中的应用,讨论了离散信号的编码过程中的作用,以及编码技术的保密用途和纠错功能。     

The Bohr correspondence principle

We consider the quantum-mechanical non-relativistic hydrogen atom. We show that for bound states with size much larger than the Bohr radius, one can construct a wave packet that is localized in space corresponding to a classical particle moving in a circular orbit.     

A correspondence of academic interest

Editor's Note: The following is a continuation of the dialogue “A Correspondence of Academic Interest” in the Spring 1994 issue ofAcademic Questions. That exchange concerned the program, recently announced by the Teachers Insurance and Annuity Association-College Retirement Equities Fund (TIAA-CREF), to promote diversity on the governing boards of the public corporations in which it invests.     

对应原理的普遍性

通过对一些实例的分析 ,得出 :不仅量子理论和经典理论之间存在对应关系 ,而且牛顿力学和相对论力学之间、几何光学与波动光学之间也存在对应关系 ,因此 ,对应原理具有普遍性。把它渗透到教学中 ,将有利于提高学生的学习、研究素质。对进一步科研也有指导性作用。     

Towards good teaching by correspondence

The work of tutors, in receiving, considering, teaching, assessing and returning the written work of students is exceptionally important in the Open University. Teaching by correspondence is central and personal in Open University teaching. Haifa million assignments are exchanged between students and tutors every year. Apart from a small number of introductory training documents, the latest of which is Teaching for the Open University, little has been written and made nationally available on this essential element of Open University pedagogy. This paper is drafted by two Tutors and a Staff Tutor in the East Midlands, Sue Cole, Maggie Coats and Helen Lentell respectively..     

英语商务信函的翻译要点

英语商务信函在国际商务活动扮演着越来越重要的角色,本文将探讨英语商务信函翻译的原则及其翻译要点.     

Do correspondence students need counselling?

The Leeds Counselling Project of the National Extension College, Cambridge, sought to investigate the needs of adult correspondence students outside the Open University. Students in Leeds were contacted by a local counsellor whose aim was to help them to pursue their courses of study successfully. The design of the project, its implementation and its results are discussed. The value of local counselling seems clear and the conclusion considers ways in which this might be provided and supported.     

统计分析中对应分析方法应用

通过数学方法的描述和统计软件SPSS对实例的分析,阐明了在统计分析中运用对应分析方法,可以得出正确的探索性统计分析结果,直观地揭示统计数据间的内在联系。     

对应原理的作用与思考

分析了在量子论的提出和量子力学的建立过程中,对应原理在物理思想和方法论上的启发和指导作用;讨论了对应原理的思想内涵,认为对应原理反映了当物质的某些属性在极限情况下可以忽略时,普遍性的物理模型趋同于特殊性的物理模型,普遍性的理论可以过渡到特殊性的理论,在结论上趋同于特殊性的理论。     

商务函电英语的语法特点

商务函电英语作为一种各体英语 ,有其独特的语法特点。本文从句子类型、句子结构、状语的位置、时与体、虚拟语气五个方面探讨了商务函电英语的语法特点     

外贸英语函电实训教学模式探讨

外贸函电作为商务英语课程体系中的一项重要内容,是商务英语专业高年级的必修专业课程,它将国际贸易实务和外贸英语相结合,有其独特的课程特点。本文针对其课程特征,分析目前外贸英语函电课堂在实训教学中应该注意的问题,探讨实训教学的模式及方法。     

Independent study by correspondence in American universities

To chart the central aspects of status and policy of American university programs of independent study by correspondence, a survey was conducted from August through December, 1982. It included all programs within the National University Continuing Education Association; virtually all American institutions offering correspondence programs are members of the NUCEA.

The purpose of this report is to present both summary and institutional information on enrollments, staff size, fees and services of American university programs. This is followed by information on the compensation customarily paid in college, high school, and noncredit programs.     

英语商务函电中的礼貌策略

礼貌原则是会话理论的重要原则之一。在商务英语函电这种特殊的会话形式中,根据会话理论中的面子威胁理论和礼貌原则,选择恰当的礼貌策略和相应的语言手段,是建立良好的商务伙伴关系、促进交易成功和实现商业利益的重要基础。