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w玻璃碎片、0共享 http://www.agildata.com/database-sharding/ The Rise of Database Sharding The concept of Database Sharding has been gaining popularity over t
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posted @ 2017-01-12 17:05
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http://blog.sciencenet.cn/home.php?mod=space&uid=287179&do=blog&id=425373 教科书书常用“定义—定理”的体系，先给出数学定义，然后给出若干性质， 从公式 到 公式，逐步推导。有的教科书采用用信号“反褶、平移、相乘、积分”给出几何
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posted @ 2017-01-12 14:46
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posted @ 2017-01-12 13:55
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posted @ 2017-01-12 13:46
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posted @ 2017-01-12 09:18
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posted @ 2017-01-12 09:06
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Monte Carlo methods https://zh.wikipedia.org/wiki/蒙地卡羅方法 通常蒙地卡羅方法可以粗略地分成两类：一类是所求解的问题本身具有内在的随机性，借助计算机的运算能力可以直接模拟这种随机的过程。例如在核物理研究中，分析中子在反应堆中的传输过程。中子与原子核
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posted @ 2017-01-11 22:13
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https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html The TE request-header field indicates what extension transfer-codings it is willing to accept
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posted @ 2017-01-11 22:05
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//array(2) { ["shopasin"]=> string(3) "www" ["whelp2017"]=> string(9) "whelp2017" } //array(1) { ["shopasin"]=> string(4) "w123" }
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posted @ 2017-01-11 16:58
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1 ALTER TABLE ad_keyword_brand 2 ADD CONSTRAINT w1 UNIQUE (keyword,adasin,brand,page_position,country,ad_kind,ad_tag);
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posted @ 2017-01-09 17:00
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