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Deep Learning（深度学习）学习笔记整理系列之（二） - 大数据 & AI - 清泛...
... T，尽可能相似，同时，S[k] 的数量尽可能少。用数学的语言来描述，就是：
Sum_k (a[k] * S[k]) --> T, 其中 a[k] 是在叠加碎片 S[k] 时的权重系数。
为解决这个问题，Bruno Olshausen和 David Field 发明了一个算法，稀疏编码...
Deep Learning（深度学习）学习笔记整理系列之（二） - 大数据 & AI - 清泛...
... T，尽可能相似，同时，S[k] 的数量尽可能少。用数学的语言来描述，就是：
Sum_k (a[k] * S[k]) --> T, 其中 a[k] 是在叠加碎片 S[k] 时的权重系数。
为解决这个问题，Bruno Olshausen和 David Field 发明了一个算法，稀疏编码...
What's better at freeing memory with PHP: unset() or $var = null
...that unset man page don't include that section anymore)
Note that until php5.3, if you have two objects in circular reference, such as in a parent-child relationship, calling unset() on the parent object will not free the memory used for the parent reference in the child object. (Nor will the memory...
Upgrading PHP in XAMPP for Windows?
...
I needed to update my php from 5.3.8 to 5.3.29. (both Thread Safe) on Windows
Steps I did:
Back-up my initial php folder, under xampp.
Downloaded zip from here
http://windows.php.net/download/#php-5.3-ts-VC9-x86
Unpack that zip into xampp folder.
Copied...
Zero-pad digits in string
...ution using str_pad:
str_pad($digit,2,'0',STR_PAD_LEFT);
Benchmark on php 5.3
Result str_pad : 0.286863088608
Result sprintf : 0.234171152115
Code:
$start = microtime(true);
for ($i=0;$i<100000;$i++) {
str_pad(9,2,'0',STR_PAD_LEFT);
str_pad(15,2,'0',STR_PAD_LEFT);
str_pad(100,2,'0'...
WinDbg基础资料（日本語） - IT优秀资料 - 清泛网 - 专注C/C++及内核技术
...gerで取得したCrash Dumpは64bit.
２．上記の環境で、64bit版のWinDbgはインストールできない(出来るとしても、手続きが必要？)
３．取得したCrash Dumpは、32bitの開発機で分析できない。64bitのマシンを用意する必要がある。...
How to fix error with xml2-config not found when installing PHP from sources?
When I try to install php 5.3 stable from source on Ubuntu (downloading compressed installation file from http://www.php.net/downloads.php ) and I run ./configure I get this error:
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How do I read any request header in PHP
...ds, which include general-header (section 4.5), request-header (section 5.3), response-header (section 6.2), and entity-header (section 7.1) fields, follow the same generic format as that given in Section 3.1 of RFC 822 [9]. Each header field consists of a name followed by a colon (":") ...
Modify SVG fill color when being served as Background-Image
...-1.6-1.3c-0.2-0.3-0.4-0.5-0.6-0.8c-0.2-0.4-0.7-0.3-0.8,0.3
c-0.5,2.5,0.3,5.3,2.1,7.1c4.4,4.5,13.9,1.7,13.4-5.1c-0.2-2.9-3.2-4.2-3.3-7.1C19.6,10,19.1,9.6,18.7,10.1z"/>
</svg>');
}
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Import regular CSS file in SCSS file?
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Starting in v3.5.3, libsass warns that this is non-standard behavior and should not be relied upon. (Instead "Use a custom importer to maintain this behaviour.") github.com/sass/libsass/releases/tag/3.5.3
– jacobq
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