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(转)进程调度函数schedule()解读
原文在linux系统中,单处理器也是多线程处理信号、事件等。这就需要一个核心算法来进行进程调度。这个算法就是CFS(Completely Fair Scheduler)。在LInux Kernel Development一书中用一句话总结CFS进程调度:运行rbtree树中最左边叶子节点所代表的那个...
分类:系统相关   时间:2015-04-01 17:28:48    阅读次数:398
转:常见验证码的弱点与验证码识别
常见验证码的弱点与验证码识别验证码作为一种辅助安全手段在Web安全中有着特殊的地位,验证码安全和web应用中的众多漏洞相比似乎微不足道,但是千里之堤毁于蚁穴,有些时候如果能绕过验证码,则可以把手动变为自动,对于Web安全检测有很大的帮助。全自动区分计算机和人类的图灵测试(英语:Completely ...
分类:其他好文   时间:2015-03-19 19:58:05    阅读次数:224
php实现动态随机验证码机制(CAPTCHA)
本文主要介绍验证码的创建与检验验证码,涉及php图像处理等知识。验证码(CAPTCHA)是“Completely Automated Public Turing test to tell Computers and Humans Apart”(全自动区分计算机和人类的图灵测试)的缩写,是一种区分用户...
分类:Web程序   时间:2015-02-06 20:14:36    阅读次数:315
Java.util.zip adding a new file overwrites entire jar?(转)
I am using java.util.zip to add some configuration resources into a jar file. when I call addFileToZip() method it overwrites the jar completely, inst...
分类:编程语言   时间:2015-02-04 16:28:57    阅读次数:163
socket TCP编程中connect的一些坑
1.服务端listen成功后,系统就自动接收客户端请求了 man listen: 其中有一段 The  behavior of the backlog argument on TCP sockets changed with Linux        2.2.  Now it specifies the  queue  length  for  completely  establishe...
分类:其他好文   时间:2015-01-29 19:36:53    阅读次数:251
11Communicating with Other Fragments(Fragment之间的通信)
In order to reuse the Fragment UI components, you should build each as a completely self-contained, modular component that defines its own layout and behavior. Once you have defined these reusable Fra...
分类:其他好文   时间:2014-12-26 09:45:18    阅读次数:210
ArcGIS操作问题
1.利用分析工具——叠加分析——“空间连接”工具,将完全包含(COMPLETELY_CONTAINS)某点的面的属性值赋为该点的属性值。其中定义用于匹配行的条件。匹配选项包括:相交—如果连接要素与目标要素相交,将匹配连接要素中相交的要素。这是默认设置。INTERSECT_3D— 如果连接要素中的要素...
分类:其他好文   时间:2014-12-25 21:56:46    阅读次数:481
Shopaholic
Description Lindsay is a shopaholic. Whenever there is a discount of the kind where you can buy three items and only pay for two, she goes completely mad and feels a need to buy all items in the st...
分类:其他好文   时间:2014-12-09 21:31:27    阅读次数:166
【译】Why JavaScript Is and Will Continue to Be the First Choice of Programmers
The software industry is constantly evolving. Many languages that were cutting edge just a few years ago either look outdated or have been made completely redundant today. Today, new languages are emerging with surprising frequency to meet the changing ne...
分类:编程语言   时间:2014-11-15 00:16:57    阅读次数:246
Object References (the Ampersand &)
Support for object orientation was completely new to PHP 4, and was therefore not very sophisticated in comparison to the OO support in other language...
分类:其他好文   时间:2014-11-01 09:40:53    阅读次数:137
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