快毕业前被拉回实验室做了个spring讲座。其实好久没深入研究过spring了,好多概念都记不太清,又没充分时间做准备,就顺势粘贴了好多了的PPT,聊以凑数。
由于实验室里水平参差不齐,这个讲座真是难讲死了,听到后来好多人昏昏欲睡,不过也有几个人说挺有收获的。
反正这几天又没写blog,就把讲座的MP3和PPT拉出来凑凑数。感觉自己听自己的声音都怪怪的,不管了,是骡子是马,大家自己看吧。
下面是下载地址: http://ccnt.zju.edu.cn/lectures/xcc_spring.rar
Apart from his personal blog, the second part of Brothers also appears in issues 2 and 3 of Harvest magazine, and it will be serialized on Sina's Book Channel. In answer to several questions posed by people commenting on his blog, Yu Hua said that the three chapters he posted were the most pleasant parts of the new volume; the fortunes of the main characters go rapidly downhill from there.
Turning to popular books in print, we find familiar faces on the bestseller list. Net writer Annie Baby has Padma (#2), emoticon-happy Gwiyeoni has the third book in the Outsider series, and Dan Brown's Deception Point (#4) joins The Da Vinci Code, Angels and Demons, and Digital Fortress in a Chinese edition. The only other new title on the list this week is Peking Duck Restaurant (#8) by director Gu Rong. A copy of this book could not be found for this article, but it appears to be an adaptation of the 1990 film starring Chen Baoguo and Ge You that told the story of the Quanjude restaurant.
The two books by Zhang on the academic list this week are Zen Outside of Zen (#3) and On Accordance with Nature (#4). The second one was conceived during the cultural revolution and worked on intermittently in the succeeding decades before being published in 1993. Kicking off from the first words of the Doctrine of the Mean: "The will of heaven is called 'nature.' Accordance with nature is called the 'way,'" On Accordance with Nature lays out Zhang's interpretation of how best to live. His day-job was working as an editor for the People's Education Press putting out textbooks and other educational materials. His own writings carried that same popular flavor (this reviewer recommends in particular his writings on wenyan).
The academic bestseller list for the week of 03/10--03/16:
The overall bestseller list for the week of 03/10--03/16:
Bestseller rankings are taken from the Friday Book Review section in The Beijing News, which compiles its data from the city's major online and brick & mortar bookstores.
搜索引擎网站的机器人 (前 10) - 全部列出 - 最近参观日期 35 个机器人* 文件数 字节 最近参观日期 Sina Iask 2509 38.61 M字节 2006年 三月 09日 18:32 OutfoxBot 838 9.81 M字节 2006年 三月 15日 02:31 Yahoo Slurp 419+66 6.09 M字节 2006年 三月 19日 21:38 BaiDuSpider 137+36 2.17 M字节 2006年 三月 18日 06:31 Googlebot 147+2 1.74 M字节 2006年 三月 11日 19:03 Unknown robot (identified by 'crawl') 130+1 1.56 M字节 2006年 三月 18日 13:33 Turn It In 93 236.54 K字节 2006年 三月 04日 01:33 MSNBot 80+7 1.52 M字节 2006年 三月 04日 04:37 BecomeBot 77+2 920.27 K字节 2006年 三月 04日 13:37 Bloglines 71 43.51 K字节 2006年 三月 04日 04:08
Idea Factory China 邮件类表中在讨论ping的机制还是爬虫的机制,哪个更好。很好的话题。
我的想法是,当一件事情有赖于多于一个人的努力才能成功的话,他成功的可能性就小很多。
比如,写blog,就算全世界都不写,我也可以写,并且感染别人,所以blog能火爆。(blog是草,大众Wiki是鹰)
做Ping,需要发的人要支持,收的人也要支持,这种分布的方式的唯一问题是,你需要很多人的协作。不是每个人都愿意协作的,圣经里的通天塔Babel就是一种努力。这就形成了网络外部性--就像一个对讲机没有用,多个才有用处。
网络外部性的东西(email, TCP/IP协议,MSN Messenger,电话)必然需要强大的外因(或者极好的运气),才可形成,但一旦形成,就会病毒性复制。
这个就像核反应堆。谁有能力击破第一个原子,以后的事情就不用你管了。这个点,有人叫做引爆点(tipping point),有人叫做临界点(Critical Mass)。
所以,搜索引擎不需要被爬的网站的配合,就可以工作,所以成功。如果依赖于别人的ping, 就像有了C2C的交易平台,却没有那足够市场经费(这是一种办法),或者经过几年的积累(这是另外一种做法)轰击原子核,很难达到Critical mass。这个和技术无关无关了。