Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 947

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/samsongli/meirendaddy.com/blog/wp-includes/kses.php on line 948
February 25, 2010

大学时候,学的最差的大概就是算法了。当时总是喜欢多想一步,问一下这个算法到底是为什么。结果老师也答不出。

同一个学期,学的最高兴的,是操作系统。教课的是当时的系主任,国内的操作系统大牛。听他老人家讲课,总是能深入浅出的理解里面的设计理念。比如进程的调度,以CPU时钟资源的公平分配为原则;比如虚拟内存的大小,是方便和节约的折中;比如缓存的分配,是历史数据向未来的有效预测等等。

那个时候就开始了解,其实算法,无非是人的决策,在计算机上面的表达。

后来到了这边读书,导师发明的算法,是解决路由问题里面对稀缺资源的调控。那个算法的精妙,就是引进了经济学的原理,让各个信号去竞争这些资源,稀缺的资源“价格”提高,使得某些信号转而去使用相对“便宜”的资源,从而达到资源调配的目的。

类似的,当我设计和他的算法相配合的算法的时候,也是把现实生活中的处理方法引进了算法里面,对于一个NP-hard问题,既然不能在多项式时间和空间找到最优解,那么就在处理的过程中,对某些“看似”最有希望的部分结果,进行拓展,最后得到一个相对优化的结果。

在web领域,因为有人的参与,就有了更多算法改良的空间。pagerank是利用了人多年在web上面积累的url数据作为网页权重的投票;相应的协同过滤,也是利用人的行为数据来提取人的兴趣。

但是在算法利用免费的人力进行优化的同时,基于这些算法建立的网络应用,也对人的行为产生了不可忽略的影响。在03年google的CEO Eric Schmidt 去系里讲座的时候,就有学生问他,如果将来大家都依赖google,不在网页上面添加链接了,google怎么办。Eric略一迟疑,说估计不会的。事实上,当google把AdWords引入以后,巨大的流量瞬间转变成了钱,人们不仅没有停止添加链接,反而变本加厉的建立起link farm以求在SRP上面占据首位。Google也不得不针对这些link spam进行算法的修改。

同样的,协同过滤虽然为Amazon带来了无数的新销售,同时也使用户的行为趋同。

6 Comments »

  1. 这样的算法应用,是否可以看作是一种经济领域民主?

    Comment by 野草博客 — February 26, 2010 @ 4:16 am

  2. “让各个信号去竞争这些资源,稀缺的资源“价格”提高,使得某些信号转而去使用相对“便宜”的资源,从而达到资源调配的目的。”
    的确有创意

    Comment by 陌上清溪 — February 26, 2010 @ 9:04 pm

  3. sjtu?

    Comment by ssyangy — February 28, 2010 @ 4:40 am

  4. Portabilidade Timberland “Cubo” foi oficialmente estabelecido em Xangai

    Comment by Timberland Botas — September 19, 2012 @ 8:47 pm

  5. wer342eee,Comes in a nice little box (you have to pay xtra for these in a lot of online stores) Got this for a great price so all in all 5 stars

    Comment by christian louboutin — December 29, 2012 @ 12:40 am

  6. 煌泛焐し⒌牡俗掀澹┥下堆と梗诰砣苏诺づ阃孪稚恚殖〔コ龆嗝枋值淖:仄危渲幸恢笔铀岸薄钡恼庞睿谄沃幸残ρ浴岸薄笨莩幔膊磺搿肮崩醋黾伪觥?
    [url=http://www.jzhtdq.com/k8/]www.jzhtdq.com/k8/[/url]

    Comment by www.jzhtdq.com/k8/ — May 7, 2014 @ 5:33 am

RSS feed for comments on this post. TrackBack URI

Leave a comment 说两句吧