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Archive for August, 2011

August 30, 2011 Leave a comment

人工智能碰上人工智能:两个机器人的爆笑对话
大家都听说过判断人工智能(AI)的图灵测试吧?或者都和一些聊天机器人说过话吧?不过那只是人与机器人之间的故事。如果两个机器人放在一起会发生什么事呢?他们彼此之间会说些什么呢?其实这是一个名为Cleverbot(聪明机器人)的两份复制品,彼此是完全相同的,为了便于识别而分别做成女性和男性,但依然显示了不同的“人格”,其中男性比较单纯,女性则有些狡猾。
from cnBeta.COM: http://www.cnbeta.com/articles/153308.htm

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August 29, 2011 Leave a comment

IT人员迅速提升自我效率的十大方法
所谓,时间就是金钱,效率也意味着时间。高效的工作方式可以为我们赢得更多成功的机遇。如何实现高效工作呢?Zielix创始人、Ingiter Frameworks的创建者Wayne Harrel发表了一篇博文《Top 10 ways to dramatically increase your personal productivity》,为我们介绍了迅速提升自我效率的十大方法。现对本文进行了编译,全文如下:
from cnBeta.COM: http://www.cnbeta.com/articles/153219.htm

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August 17, 2011 Leave a comment

Final Specs for Browser-Neutral Web Performance Could Be Weeks Away

ML_LogoUpdate_IE9Detail.pngAnyone who has had the task (or, perhaps more insanely, given himself the task) of measuring the relative performance of various Web browsers knows how impossible it is to convince everyone of the validity of his chosen metrics. (Guilty as charged.) Some folks settle for running a Sieve of Eratosthenes algorithm in JavaScript; others will call up Google’s V8 benchmark page which always seems to give tremendous numbers for Chrome; and still others prefer loading google.com 100 times, averaging the load times, and concluding there’s not much to conclude.

Since last June, W3C has taken up the task of creating a uniform specification for all browser manufacturers to adopt. This specification includes a suite of JavaScript APIs that enable browsers to determine how much time certain fundamental tasks may consume – changing the active page, loading a page into memory, downloading any discrete amount of data from a server.

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The goal is not just to give speed freaks like me a new and unchallengeable method of measuring how long it takes to load a Web page. When a script loaded into a browser is capable of measuring the workload capacity of that browser, it may be able to tailor the workload to suit the browser. This is especially critical, W3C determined, in a broadening environment where Web apps designed to be capable of running entire factories can run on smartphones.

In a test case published last month by Microsoft, which co-chairs the W3C’s Web Performance Working Group, a browser becomes capable of determining when the monitor is ready to receive the next frame of animation, using a new API called requestAnimationFrame. The technique is similar to what developers use today with JS statements such as setTimeout and setInterval, explained IE Program Manager Jatinder Mann. “The key difference is that it notifies the application when the browser needs to update the screen, and only when the browser needs to update the screen. It keeps Web applications perfectly aligned with the browser’s painting, and uses only the necessary amount of resources.”

When W3C fully standardizes this API function, browsers will be able to implement it without use of brand-specific prefixes, which various manufacturers use for safety reasons. The final form of that function in a JS instruction looks something like this: if (window.requestAnimationFrame) window.requestAnimationFrame(draw);, where draw points to the single callback function that executes the drawing.

“Resource Timing, User Timing, and Performance Timeline specifications are all in the Last Call phase of specification,” Mann wrote today. “Last Call is a signal that the working group believes the spec is functionally complete and is ready for broad review from both other working groups and the public at large. This Last Call period extends until September 15, 2011.”

Mann is the co-author, along with Working Group chair Arvind Jain of Google, of the latest draft of the Page Visibility specification, whose Last Call phase expires September 8. The Performance Timing and Navigation Timing specs work in concert to enable scripts to effectively time the complete page loading phase, rather than wait for the entire JavaScript content to be loaded first – which is the current situation. Although W3C specifications clearly state, “The interface provided by this work does not intend to be used as any sort of performance benchmark for user agents,” you can bet that this is precisely what it will be used for the moment it’s made public.

In celebrating the first year of the Working Group’s operation, Microsoft’s Mann wrote, “It’s encouraging to see how much progress we’ve collectively made in just one year. These APIs are a great example of how quickly new ideas can become interoperable standards that developers can depend on in modern HTML5-enabled browsers.”

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from ReadWriteWeb: http://www.readwriteweb.com/hack/2011/08/final-specs-for-browser-neutra.php?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+readwriteweb+%28ReadWriteWeb%29

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August 15, 2011 Leave a comment

[组图]摩托罗拉80年历史回眸(1928-2008)
谷歌8月15日宣布以125亿美元现金收购摩托罗拉移动。该交易已得两家公司董事会批准。摩托罗拉移动继承了原摩托罗拉消费电子的光荣,在历史上摩托为我们带来了无数个第一:对讲机、收音机、晶体管、蜂窝电话、寻呼机、GPRS、WiMax……趁此机会,我们一同来回顾摩托罗拉截止2008年的历史上,最重要的几个瞬间:
from cnBeta.COM: http://www.cnbeta.com/articles/151750.htm

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August 9, 2011 Leave a comment

WordPress中timthumb.php远程文件存储漏洞分析-学院-黑基网
WordPress中timthumb.php远程文件存储漏洞分析-学院 黑客培训 黑客软件 黑客下载 黑客图片 黑客动画 黑客大全   今天在微博上看见的关于wordpress出现了漏洞,随即赶紧打开相关页面分析具体原因,发现是timthumb …
from web.hackbase.com: http://web.hackbase.com/tech/2011-08-05/64830.html

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August 7, 2011 Leave a comment

改变思想的数学
观点将随事实的改变而改变,这是贝叶斯定理的真谛。 贝叶斯定理以18世纪的长老教会牧师Thomas Bayes的名字命名,目的是为了解决一些本质问题:当更多信息涌入时我们如何改变信仰?是顽固的直到旧有假说完全站不住脚?还是在怀疑第一次出现后立即抛弃旧观念?贝叶斯的推导已经变成了无价的科学工具,它帮助我们一步步认清现实。也许人人都应该像贝叶斯那样思考。贝叶斯理论的核心依赖于巧妙的转变思路:如果你想评估根据证据提出的假说的有力程度,你必须先评估证据的有力程度。面对着不确定性,贝叶斯提出了三个问题:对最初树立的信念的真实性我有多大的信心?如果对最初的信念坚信不疑,对新证据的准确性我有多大的信心?如果对最初的信念摇摆不定,对新证据的准确性我有多大的信心?大卫·休谟就是一位贝叶斯主义者,他就是通过证据的可能性质疑神迹的准确性。贝叶斯定理并非由贝叶斯本人发展而来,而是来自他的朋友、业余数学家Richard Price,后由著名法国数学家拉普拉斯发扬光大。

from Solidot: http://solidot.org.feedsportal.com/c/33236/f/556826/s/17301eac/l/0Lscience0Bsolidot0Borg0Carticle0Bpl0Dsid0F110C0A80C0A60C14720A20Gamp0Pfrom0Frss/story01.htm

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