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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...
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。...
Using LIMIT within GROUP BY to get N results per group?
... 1 |
| p01 | 6.8 | 2008 | 2 |
| p01 | 5.9 | 2001 | 3 |
| p01 | 5.3 | 2007 | 4 |
| p02 | 12.5 | 2001 | 0 |
| p02 | 12.4 | 2004 | 1 |
| p02 | 12.2 | 2002 | 2 |
| p02 | 10.3 | 2003 | 3 |
| p02 | 8.7 | 2000 | 4 |
Note that if the rates had ties, for example:
100, 90, 90...
“Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed
...=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"xcb"
]
},
"className": "QXcbIntegrationPlugin",
"debug": false,
"version": 329472
}
Got keys from plugin meta data ("xcb")
loaded library "/medi...
PHP - how to best determine if the current invocation is from CLI or web server?
...
aolserver
apache
apache2filter
apache2handler
caudium
cgi (until PHP 5.3)
cgi-fcgi
cli
cli-server (Built-in web server as of PHP 5.4)
continuity
embed
fpm-fcgi
isapi
litespeed
milter
nsapi
phttpd
pi3web
roxen
thttpd
tux
webjames
...
PHP + MySQL transactions examples
...is has not been documented yet by the PHP team, and I'm still stuck in PHP 5.3, so I can't comment on it.
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What is the HMVC pattern?
...
I am currently in the process of developing my own PHP 5.3 HMVC framework called Alloy. Since I am heavily invested in and sold on HMVC, I thought I could offer a different view point, and perhaps a better explanation of why HMVC should be used and the benefits it brings.
The la...
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'...