这种情况下你会改变你的选择吗? (有意思的概率问题)
有三间屋子，A、B、C，一件礼物a，这件礼物被放到了三间屋子中的一个，现在让你来猜礼物在哪间屋子里。
很明显，随便猜一个，猜中的概率为1/3，这个很简单，但接下来的问题是：
如果你选择的屋子是X，在放礼物的人知情的情况下，他打开了一间屋子，这间屋子：
- 不是你所选择的屋子X
- 不是包含礼物的屋子Y
问，剩下两间屋子中，X和另一间屋子Z中有礼物的概率如何？
答案并不是显而易见的……
阅读全文…A rough plan for training a new security officer lead for Frontfree
It’s really necessary to train a new security officer lead for Frontfree, if I must leave the campaus. While it will be reasonable if I will invest some of my time maintaing the server, they must deal some real-world problems theirselves, as I may be unable to reach these boxes in time.
阅读全文…Mid-term delphij.net migration plan
As mentioned before, I will finally get the whole delphij.net out from beastie.frontfree.net because I will be finally graduated from the university and hence I must give maintainership (at least the principal maintainership) to someone who still live in the campaus so they can better solve problems encounted with. Well, I missed the post so much, as I have acted as principal maintainer and security officer there for more than three years: I became the security officer in 2000 when I joined the Association of Computer Machinery at School of Computer Science, Beijing University of Technology because nobody else in my grade can operate a Linux box :-)
阅读全文…Plan for my own server
As some of you may know, I am planning to buy a server with some friends and take it in an IDC by the time I will be graduated from the university. The server will be primarily do personal web, ftp hosting, as well as mail service and DNS service.
阅读全文…How will a distributed peer system control itself?
This is a complex problem. A peer to peer system consists many self-determinating nodes is hard to control, and when it goes crazy, it will be easy to launch a distributed denial-of-service (DDoS) attack.
Here are some of my thoughts, well, they are not mature and some of them might be misleading, but I will write them here.
阅读全文…dillon resumes to work!
He is again committing numerous CAPS IPC work. Well, again, is it really 锁骨?
At the same time, Hiten Pandya has done website work. This also inspired me to improve the bachelor’s research site and Candice has reported that the problem has gone.
参与评论杂记 2004-03-06
最近发生了很多事情，一直想写点什么，但就像 www.delphij.net 的工程一样，planned，然后，就放在那儿了。但我终于决定把一些事情写出来，按照Jeffrey的说法，有的事情憋在心里，最后会拧成一个结，而带来更大的问题。
阅读全文…sysctl spining fixed
Don Lewis (truckman@) has committed a fix for the sysctl spinning problem I mentioned here some days before. Currently, beastie.frontfree.net is running a workaround which made it possible to skip the deadlock, however, will not guarantee the correct result.
阅读全文…据说有90%的人的思维方式跟我们不一样……
昨天毕设讨论的时候 端木 提到一件事，就是百度公司的一位高层提到，有90%的人的思维方式，和计算机专业的学生是完全不一样的，例如，当他们的浏览器主页被修改之后，他们会尝试去用那个主页提供的功能，而不是想把它改回原状。
阅读全文…Windows memory dump options
From Microsoft’s KB:
阅读全文…You can configure Microsoft Windows 2000, Microsoft Windows XP, and Microsoft Windows Server 2003 to write debugging information to three different file formats (also known as memory dump files) when your computer stops unexpectedly as a result of a Stop error (also known as a “blue screen”, system crash, or bug check). You can also configure Windows not to write debugging information to a memory dump file. Windows can generate any one of the following three memory dump file types:
Complete memory dumpKernel memory dumpSmall memory dump (64 KB)