Antonio's profile天雨流芳PhotosBlogListsMore ![]() | Help |
人间正道是沧桑最近迷上这戏,一看就停不下来。 我想我是在净化心灵,我是在学习,很高效的学习平时无法从生活中提炼、总结的道理。 很多时候我也一样,除了理想,一无所有。 没有什么东西,什么人,天生就属于你的。 人要豁达些,不是吗?对每一个人。 中国首台百万亿次超级计算机“魔方”正式启用来源:新华网 中国首台百万亿次超级计算机——“魔方”6月15日下午在上海正式启用。 “魔方”不但是亚洲第一的超级计算机,也是目前美国本土之外唯一计算速度排名进入全球前十的超级计算机,表明中国成为全球第二个能够研发百万亿次超级计算机的国家。 “魔方”由中科院计算所国家智能计算机研究开发中心、曙光信息产业(北京)有限公司、上海超级计算中心联合研制。 中国首台国产百万亿次超级计算机曙光5000A去年9月在天津成功下线,11月在北京完成性能测试,并在同月位列全球最快超级计算机排行榜TOP500第十、亚洲第一。 通过全国公开征名,这台亚洲第一超级计算机最终被命名为“魔方”。今年5月15日“魔方”由北京运抵上海超级计算中心,经过近一个月的安装调试,于6月15日正式对外开放运行。 “魔方”是科技部“十一五”期间在“863计划”中安排的“高效能计算机及网格服务环境”重大项目的主要成果之一,也是科技部和上海市部市合作的典范之一。 “魔方”由42个节点机柜、10个互联网络机柜、15个存储机柜组成。该系统采用AMD公司生产的“巴塞罗那”4核芯片、4路刀片系统、8路机架式节点和InfinibAnd高速互联的体系架构,全机峰值计算能力超过了惊人的200万亿次,全机总存储容量达到 500TB(千万亿字节)。 成立于2000年的上海超级计算中心是国内首个对全社会开放的高性能计算公共服务平台,应用领域覆盖新材料、生物信息、制药等基础研究领域和航空、汽车、钢铁、船舶等多个工业经济领域。 “魔方”的计算能力是此前该中心部署的上一代超级计算机曙光4000A的20倍。根据计划,中国在2010年底前还将推出首台使用自主芯片的千万亿次高性能计算机“曙光6000”。 中美达成一致 wipi有望获国际认可来源:新浪科技 针对国产无线局域网标准WAPI国际化进展一事,WAPI工作组透露,中美之间已就此事达成一致意见,WAPI将以独立标准的形式推进成为国际标准。这将使得WAPI与WIFI之争就此即将结束:WAPI在搁浅5年后有望获国际认可。 大功告成今天忙了一天,我的personal homepage终于做好了,欢迎大家访问: [转] 曲靖话。。。(当笑话看看)1.一般疑问句 CAPTCHA – Telling Humans and Computers Apart AutomaticallyFirst of all, you make ask me what is CAPTCHA? In our daily life, CAPTCHA is everywhere especially when we surf online. In Chinese, CAPTCHA means “图片验证码”. Here I will talk about some interesting aspects on CAPTCHA. Most ideas come from Xiaojun Zhu’s blog: http://bbs.nju.edu.cn/b/041221, where he discusses many interesting research issues. More details are described in Manuel Blum’s paper “TELLING HUMANS AND COMPUTERS APART AUTOMATICALLY” published in COMMUNICATIONS OF THE ACM, Vol.47, No. 2, February 2004 (Manuel Blum is the Turing Award Winner in 1995, whose adviser Marvin Minsky is the Turing Award Winner in 1969). It is no doubt that CAPTCHA is a great application, because it’s a real application of a Turing Test. CAPTCHA can be automatically generated, which most humans can pass, but that current computer programs cannot pass. The only difference is that the judge in CAPTCHAs is now a computer, while the judge of Turing Test is a person. The strength of CAPTCHA is that it can tell us a action in Internet even computer world is real human’s behaviors or machines. It let me think about the world in Matrix where you cannot know who is a real man or just an agent of Matrix. Don’t look down on the role of CAPTCHA, let’s see a case of it. In Nov. 1999, the Web site slashdot.com released an online poll asking which was the best graduate school in computer science – a dangerous question to ask over the Web. As is the case with most online polls, IP addresses of voters were recorded in order to prevent single users from voting more than once. However, students at Carnegie Mellon found a way to stuff the ballots by using programs that voted for CMU thousands of times: CMU’s score started growing rapidly. The next day, students at MIT wrote their own voting program and the poll became a contest between voting “bots”. MIT finished with 21,156 votes, Carnegie Mellon with 21,032 and every other school with less than 1,000. Can the result of any online poll be trusted? Not unless the poll requires that only humans can vote. Now, CAPTCHA is used in most of votes, entries, e.g., QQ now need users have a CAPTCHA when they login. From CAPTCHA, we can see the ideal combination between theory and practice. As known to all, Turing Test is a classic theory in Artificial Intelligence, and now it in the form of CAPTCHA is running in millions of computers to order our e-life. While in my opinion, it may lose its power when someday advanced computers can identify what CAPTCHAs mean. 又喝醉了今天老默要走了,去加拿大某鸟学校待一个月,天音马上要去德国开会,故放纵了很他们喝了几昼。好像从未怎么醉过,走路都晃了,七年南大,七年之痒,该走了,朝新的目标出发! 六一这年头, 儿童过情人节,情人过儿童节,呵呵。 |
|
|