"菜鸟"网上行电子邮件"好轻松"

我们“菜鸟”经过学习 ,已经可以在网上冲浪了 ,我们已经有了自己的上网帐号 ,申请了免费的Ｅ -Ｍａｉｌ,学会了聊天。网络的一项强大功能就是进行通讯 ,通过网络发送和接受电子邮件是它的基本功能之一。接下来我们谈谈电子邮件的话题。先说免费的电子邮件吧。你是不是已经申请了免费的Ｅ -Ｍａｉｌ了 ?启动ＩＥ ,在地址栏内键入ｗｗｗ．３７１．ｎｅｔ(以它为例 ,别的都是大同小异 )。出现了图１的窗口。在“用户名”栏内填写你申请时获准的用户名 ,在“用户密码”栏内填上你的密码 (没有忘了吧 ) ,单击“进入”按钮 (光标变成小手 ) ,出现…     

"积件"呼唤"开放"

拜读了肖老师的《花开花落何时了》,大有感触.在文章中肖老师提倡大家来制作"积件",我深表赞成,但我更希望"积件"的制作能走向"开放"."积件"的"开放"并不意味着放弃所有权.     

"短板"与"长板"

“木桶理论”众所周知．由于市场竞争加剧．“木桶理论”越来越显示出深度上的苍白．许多企业开始真正理解并思考该理论的实际作用,于是“木桶理论”经过了众多的补充和演变．其内涵也越来越丰满．已经超过当时最原始的定义了。如今,这一理论的内涵相当丰富：一个木桶的储水量．不仅取决于最短板的长度．还取决于木桶的直径大小：在每块木板都相同的情况下,     

少点"示范"多点"探究"

实例 今天上午听了两节信息技术课,教学目标明确,师生的达标意识强,学生把教师的"示范"学得挺不错,教师和学生都圆满地完成了任务.但仔细想来,这两节课好像又少了点什么,学生是在教师"教"了之后"学"的,"学"得再扎实、再有效,也是在被动地"学",学生的思维已经被教师"定势"了,没有了创新"火花".     

做"蝴蝶"还是做"鲶鱼"

曾经有一家南方著名的家电零售商在引入IT终端模式的时候引入了“蝴蝶效应”的理论,一时间引起了业界广泛的争论;而前不久,京城知名家电巨头大中电器又大张旗鼓地进军IT零售领域,更打出了“鲶鱼效应”的招牌,在引来了诸多不同含义的目光的同时,更激发了同业厂商和媒体普遍的热烈反响。“蝴蝶”VS“鲶鱼”“蝴蝶效应”最初是一个天气预测的模型,其原意是:北美洲的一只蝴蝶扇动一下翅膀,就有可能在加勒比海掀起一股飓风。后来这个模型逐渐地被引入了混沌经济学理论。“蝴蝶效应”所揭示的现象看起来虽然具有杂乱无序、捉摸不定的特点,但在客观的市场里面却存在着广泛的适用性。我们这里所说的“蝴     

"画图"课中的"小插曲"

小插曲 这是笔者执教公开课时的一个片断: 在讲完"复制/粘贴"这一菜单命令的用法之后,我让学生试着在电脑上画一些矩形、椭圆等图形后进行"复制/粘贴"练习.忽然,不少学生好像发现了"新大陆":"老师,老师,我们发现了‘复制/粘贴'的新方法……"我不禁暗喜,因为下一步我就要讲Ctrl键的妙用了.     

"旅行者"之"父"访谈录

爱德华·斯通像一位自豪的父亲,30年来一直小心翼翼地注视着"旅行者1号"和"旅行者2号"的行踪.这两架生命力顽强的轨道探测器从制图板上起,直到对行星及其卫星硕果累累的发现,无一不在他--这次宇航任务的首席科学家的指挥之下.现在,他领导的这次宇航任务进入了新的阶段,这一双孪生探测器正翱翔在没有任何人造物体造访过的星际空间.斯通先生与<科学世界>的莫娜·基昂谈起了他的这对令人刮目相看的"宝贝".     

带"毒"上课中的"信息安全"

"什么是信息?"当教师向小学生提出这样的问题时,他们会对答如流:"信息就是有用的消息."因为这是信息技术第一节课中的概念,学生回答起来很容易.可是,你如果追问:"那信息安全是什么意思呢?"很多小学生就不知如何回答了.在一次教学过程中,我就遇到了这样的问题.     

"技术"教学的"艺术"

每个班上总有一两个学生不守纪律,而最让我恼火的是随意离开座位和插嘴说话.看到有的学生这样我的心情就会变坏,脾气也急躁了,一副恨铁不成钢的样子.而那几个"小捣蛋"还是无所谓的样子,真是让我气不打一处来.     

"竞"情娱乐"机"高一筹

记联想IEST 2006国际电子竞技锦标赛赛事用机锋行K系列电脑 在日前刚刚落幕的联想IEST 2006国际电子竞技锦标赛中国区总决赛上,魔兽争霸、星际争霸、实况足球的游戏高手们为大家上演了一场龙争虎斗的激情碰撞,震撼的游戏让玩家充分体会到了"激情、挑战、活力"的精神,吸引了无数电竞爱好者的眼球.     

德州市水利信息化现状与前瞻

在总结德州市水利信息化工作现状和成效、分析存在问题及成因的基础上,对该市加快水利信息化建设进行深入思考,提出"3456"的工作建议,即"三项统一"夯实基础、"四大系统"突出重点、"五个强化"保障发展、"六个深化"实现目标。     

The informed neuron: Issues in the use of information theory in the behavioral sciences

The concept of information is virtually ubiquitous in contemporary cognitive science. It is claimed to be processed (in cognitivist theories of perception and comprehension), stored (in cognitivist theories of memory and recognition), and otherwise manipulated and transformed by the human central nervous system. Fred Dretske's extensive philosophical defense of a theory of informational content (semantic information) based upon the Shannon-Weaver formal theory of information is subjected to critical scrutiny. A major difficulty is identified in Dretske's equivocations in the use of the concept of a signal bearing informational content. Gibson's alternative conception of information (construed as analog by Dretske), while avoiding many of the problems located in the conventional use of signal, raises different but equally serious questions. It is proposed that, taken literally, the human CNS does not extract or process information at all; rather, whatever information is construed as locatable in the CNS is information only for an observer-theorist and only for certain purposes.Blood courses through our veins, andinformation through our central nervous system.— A Neuropsychology Textbook.     

The Valid Use of Utility in Adaptive Real-Time Systems

Real-time systems that must adapt their behavior to changes in internal and external circumstances require flexibility in their scheduling. One approach that has been advocated for achieving this flexibility is called value-based scheduling, wherein services are distinguished based upon their current utility values. The main result of this paper is that the assumptions used in the assignment of these values must be matched with the way the values are used in scheduling. The key notion for ensuring this is the scale type of the value, in the sense defined by measurement theory. There are simple tests for meaningful uses of values based on their scale types, and we apply these tests to investigate the meaningfulness requirements of some commonly-used scheduling approaches.     

A Stylometric Analysis of Ya?ar Kemal’s ? nce Memed Tetralogy

We analyze four nce Memed novels of Yaar Kemal using six style markers: most frequent words, syllable counts, word type – or part of speech – information, sentence length in terms of words, word length in text, and word length in vocabulary. For analysis we divide each novel into five thousand word text blocks and count the frequencies of each style marker in these blocks. The style markers showing the best separation are most frequent words and sentence lengths. We use stepwise discriminant analysis to determine the best discriminators of each style marker. We then use these markers in cross validation based discriminant analysis. Further investigation based on multiple analysis of variance (MANOVA) reveals how the attributes of each style marker group distinguish among the volumes.     

Pentagons: A weakly relational abstract domain for the efficient validation of array accesses

We introduce Pentagons (), a weakly relational numerical abstract domain useful for the validation of array accesses in byte-code and intermediate languages (IL). This abstract domain captures properties of the form of . It is more precise than the well known Interval domain, but it is less precise than the Octagon domain.The goal of is to be a lightweight numerical domain useful for adaptive static analysis, where is used to quickly prove the safety of most array accesses, restricting the use of more precise (but also more expensive) domains to only a small fraction of the code.We implemented the abstract domain in , a generic abstract interpreter for.NET assemblies. Using it, we were able to validate 83% of array accesses in the core runtime library in a little bit more than 3 minutes.     

从“言、象、意”看现代艺术设计创作

"言、象、意"是中国传统文化的一部分,中国传统艺术中"意"是人的内心活动和客观物象相互作用形成新概念的过程,讲究"意境"、"意在笔先",在书法艺术中更是"纵横有可象",笔法作为一种对"原理的"模仿和观念的模仿,达到"势"的相通和"意境"的传递。本文通过对"言"、"象"、"意"理论应用环境及含义的逐一分析,例举现代优秀设计范例的创作过程实证:"象"所表之"意"来自艺术家对客观信息或客观物象独特的理解和感悟。     

Maintaining Longest Paths Incrementally

Modeling and programming tools for neighborhood search often support invariants, i.e., data structures specified declaratively and automatically maintained incrementally under changes. This paper considers invariants for longest paths in directed acyclic graphs, a fundamental abstraction for many applications. It presents bounded incremental algorithms for arc insertion and deletion which run in O( + || log||) time and O() time respectively, where || and are measures of the change in the input and output. The paper also shows how to generalize the algorithm to various classes of multiple insertions/deletions encountered in scheduling applications. Preliminary experimental results show that the algorithms behave well in practice.     

Organisational development issues and the implementation of the Clean Technology paradigm in industry

Environmental protection activities in industry have rapidly increased in number over the last years. Additionally, surveys of environmental activities have identified a change in the kind or in the approaches used to environmental problem solving. A new paradigm Clean Technology has been developed which gradually seems to replace the Clean-up Technology paradigm and the older Dilute and Disperse paradigm. The new Clean Technology paradigm brings with it not only a new way of looking at environmental protection, but also a range of rules guiding the application of technology and the design of technological systems. This paper presents a few case studies highlighting and evaluating Clean Technology activities.