What's xxxIn multivariate statistics and the clustering of data, spectral clustering techniques make use of the spectrum (eigenvalues) of the similari...
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其他好文 时间:
2014-07-22 22:51:53
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193
Nvidia's Pascal to use stacked memory, proprietary NVLink interconnectbyScott Wasson— 6:50 PM on March 25, 2014GTC — Today during his opening keynote ...
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其他好文 时间:
2014-07-22 22:50:34
阅读次数:
497
我们在开发过程中,经常需要针对一列,基于条件逻辑来返回一个值,那么,这时候就需要使用到CASE表达式了。 例如,以下对Products表的查询就在SELECT语句中使用了CASE表达式,以生成用于描述categoryid列取值的信息。 SQL代码如下: -- 设置数据库上下文USE TSQLFund...
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其他好文 时间:
2014-07-22 22:48:53
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133
Perl语言编程不安全语法检查可用下面两个命令: #!/usr/bin/perl?-w ? ?或者: use?warnings; ? ? 虽然两者都可以提示不安全的语法, 但是还是有差别的, Perl帮助文档里面写到: ? ??The warnings prag...
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其他好文 时间:
2014-07-22 09:13:37
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188
What if the given tree could be any binary tree? Would your previous solution still work?Note:You may only use constant extra space.For example,Given ...
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其他好文 时间:
2014-07-22 08:37:34
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289
NDK Prebuilt library support: NDK使用二进制库方法: Android NDK r5 introduced support for prebuilt libraries (shared and static), i.e. the ability to include and use, in your applications, prebuil...
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其他好文 时间:
2014-07-22 08:28:36
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297
#!/usr/bin/perl
#?name:?logcalc.pl
#?calc?the?amount?of?access?url
use?strict;
use?warnings;
use?diagnostics;
use?File::Basename;
my?($arg,?$arg_only);
my?$FILE;
my?($year,?$mo...
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其他好文 时间:
2014-07-22 08:13:36
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221
基础 1:创建数据库 CREATE DATABASE dbname 2:删除数据库 DELETE DATABASE dbname 3:备份sql server 创建备份数据的device: USE master EXEC sp_addumpdevice ‘disk‘, ‘testBack‘, ‘c:/mssql7backup/MyNwind...
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数据库 时间:
2014-07-21 10:34:48
阅读次数:
261
无意中看到别人说sql语句加where 1=1会低效,所以就测试下: 新建测试表: USE [gk4]
GO
/****** 对象: Table [dbo].[Table_1] 脚本日期: 07/18/2014 15:34:02 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDE...
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数据库 时间:
2014-07-21 10:21:07
阅读次数:
333
It is often useful to swap the values of two variables. With conventional assignments, you have to use a temporary variable. This solution is cumberso...
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其他好文 时间:
2014-07-19 18:32:06
阅读次数:
243