欧洲重拳出击挑战Google

导语：由法德两国联合推动，诞生于去年四月的欧洲搜索引擎研发计划，即将于今年夏天投入实施阶段。     

华为3COM构筑下一代电子政务好网络

华为3Com公司认为电子政务网面对四个挑战:业务层面、网络层面、安全层面和管理层面。业务层面的挑战包括,各种政务应用无法做到安全隔离;各种政务应用对网络资源的要求不同;政务应用变化要求网络随需而变。网络层面的挑战包括:网络资源利用效率低下;各种业务网络缺乏有效融合;     

介绍获得斯大林奖金的几位苏联科学家——苏联科学家羣

著名的俄罗斯科学家,植物生理学的一个创立者,特米雅热夫(Timiryazev),常常反对有人在他面前讲到“纯粹”科学和“应用”科学。他认为只有科学和科学的应用。的确,在科学工作中的每一部门,每一阶段都接触到实际的应用,这就使其     

伦敦补习教育概况

英人对于补习教育年来极为注意.推原其故.约有数端.普通知识程度提高。一也.个人愿望扩大.二也.职业与地位之竞争加烈.三也.欲利用余暇时间.从事有趣味之研究.四也.受欧洲大战教训.对于日常事物.希望取得广博之认识.五也.行政当局谋所以适应此要求.则对于补习教育之设施.力加推广.而以伦敦尤为发达.兹就其含有职业教育性质者述之.此项补习教育.即基于上述第二原因而成立.更占重要地位.     

日本實業補習教育近况

日本文部省職業教育局近嘗調查補習學校實施職業教練之成效。及其進展之程度。蓋日本改府發展其教育制度而致力於此點。已歷多年。而其制定職業教練之规程。亦且在一般西方国家討論此問題之前也。一八九○年。日本頒佈尋常小學校令。同時卽頒佈實業補習學校規程。越三年。又別頒一種規程。至一九○二年加以修正。但现在之制度     

两个从仆人升到总理的成功人

怎样爬升到极顶.这便是一个要教那纽约两位营业界人物答复的问题.他们俩都是从楼梯底下慢慢儿走到顶上去的.新近都当选了他们公司的领袖.所以他们自己讲历年的进程.很有价值.这两个人中的一人.在十七岁时候.便从苏格兰渡海到美国.要试探他的幸运.他起先做一家公司里的听差.还有一人.从二十一岁到纽约.身边只有一枝速记用的铅笔和一本记事簿.他们都是用自己力量     

Modeling water and carbon fluxes above summer maize field in North China Plain with back-propagation neural networks

INTRODUCTION Dynamics of carbon and water vapor fluxesexchange between the atmosphere and the ecosystembiosphere, depend on complex and non-liner interplayamong physiological, ecological, biochemical andedaphic factors and meteorological conditions (Jarvis,1995; Leuning et al., 1995). There are many studiesquantifying the fluxes across different time and spacescales as well as assessing the environment con-straints on them by some kinds of biophysical orempirical models whose resul…     

中学信息技术教学几点做法

中小学信息技术教学的主要目的是让学生在了解计算机文化、初步掌握一些计算机基本知识和技能的同时，进一步激发学生的学习兴趣、增强信息意识和创新意识、有效培养学生对信息的收集、处理、应用和传输的能力．培养学生的自学能力和创造能力。[第一段]     

On the Nature and Role of English in Asia

The present paper is divided into eight sections:introduction,the global diffusion of English,perceptions of the new varieties,the issue of intelligibility,features that cause unintelligibility,need for a broader pragmatics,and pedagogical impli- cations,and conclusion,followed by the references.Not surprisingly,the global spread of English has generated varying perspec- tives on the nature and functions of its acculturated varieties.Broadly speaking,the debate has divided scholars into two camps holding diametrically opposing views on the multiple versions of English.On the one hand,some scholars view variations as symp- toms of linguistic degeneration and deterioration;on the other hand,some scholars legitimize them as inevitable manifestations ne- cessitated by the demands of the new cultural contexts.The normative view of the former camp stems,at least partly,from the problems the new forms of English pose in terms of international intelligibility.It is in this context that the paper examines the traditional,one-sided,native speaker-centred idea of intelligibility and the recent two-sided view of intelligibility that places the onus on both the native speaker and the non-native speaker.The argument of the latter camp is based on the premise that the new varieties require a broader pragmatic framework,because universal pragmatics is inadequate to describe them satisfactorily. Thus,the camp advocates a need for a language specific pragmatics,and a comparative pragmatics,in addition to the traditional universal pragmatics.Logically,the debate on phonological,lexical,grammatical,and discourse structure variations,and their le- gitimacy has prompted English language teaching specialists to have a fresh look at the goals and objectives of teaching English in the countries of the outer and expanding circles,and accordingly prioritize the teaching of national and regional varieties over that of the so-called native varieties.Thus,the paradigms of independence and centrality of the new varieties are replacing the paradigms of their dependence and marginality.     

农业中的放射性同位素

原子核的秘密的揭露,使人类掌握了新的無穷尽的能源。第一座原子能电站在苏联的建立,为將这个能源实际利用于工業和农業的和平目的,奠定了基础。原子技术的發展,开辟了把放射性同位素应用到各种全然不同的科学技术部門中去的广闊的可能性。人工取得放射性同位素的方法之一,是在原子核反应堆中用中子来照射。比如,用中子照射普通的天然的磷的时候,部分的磷原子核就和中子結合而变成磷的放射性同位素(磷-32)的原子核。当放射性磷的核衰变的时候,核中的一个中子轉化成質子,同时放射出一个β粒子(帶陰电的电子)。衰变是按照这个方式發生