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Alexa互联网信息公司中文官方网站
80legs: 每天抓取20亿页面的蜘蛛网格服务
2009-10-13 10:04:16
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# Exceptional performance: Crawl up to 2 billion web pages/day. # Easy to use and highly customizable: Design and run your own crawls in minutes. # Very affordable: Only $2 per million pages crawled and $0.03 p...
市场分析报告_流量统计_数据专家cnzz.com
FastStone Screen Capture - The Best Screen Capture Software
乱象，印迹 » beta技术沙龙：大型网站的Lucene应用
2009-07-29 06:48:03
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用Lucene存放全文索引，用Memcache + Berkeley DB(Java Edition)负责存储。这样有两个好处，一是减轻了Lucene的数据规模，提高了程序的效率（Sphinx就是这样）；另一方面，这套系统也可以提供某些类似SQL的查询功能。实际上，L...
Google 阅读器 - 车东 的共享条目
Multiproxy Switch :: Firefox 附加组件
Statistical significance - Wikipedia, the free encyclopedia
2009-07-04 16:50:12
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The significance level is usually represented by the Greek symbol, α (alpha). Popular levels of significance are 5%, 1% and 0.1%. If a test of significance gives a p-value lower than the α-level, the null hyp...
Statistical significance - Wikipedia, the free encyclopedia
2009-07-04 16:50:12
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The significance level is usually represented by the Greek symbol, α (alpha). Popular levels of significance are 5%, 1% and 0.1%. If a test of significance gives a p-value lower than the α-level, the null hyp...
