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python学习——numpy练习题

importnumpyasnpIn[9]:#1创建一个长度为10的一维全为0的ndarray对象，然后让第5个元素等于1n=np.zeros(10)n[4]=1print(n)[0.0.0.0.1.0.0.0.0.0.]In[10]:#2创建一个元素为从10到49的ndarray对象np.arange(10,50)Out[10]:array([10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,

系统 2019-09-27 17:47:31 3139

编程技术

Godaddy主机购买图解教程

1#大中小发表于2007-3-2812:31PM只看该作者Godaddy主机购买图解教程新的购买说明请参考：http://bbs.idcspy.com/thread-20584-1-2.html-------------------------------------------------------------------------------------------------------------------------------------

系统 2019-08-29 23:31:48 3139

编程技术

[转]分布式数据库概述

From:http://fineboy.cnblogs.com/archive/2005/08/03/206395.html1．前言随着传统的数据库技术日趋成熟、计算机网络技术的飞速发展和应用范围的扩充，数据库应用已经普遍建立于计算机网络之上。这时集中式数据库系统表现出它的不足：数据按实际需要已在网络上分布存储，再采用集中式处理，势必造成通信开销大；应用程序集中在一台计算机上运行，一旦该计算机发生故障，则整个系统受到影响，可靠性不高；集中式处理引起系统的规

系统 2019-08-29 23:17:18 3139

编程技术

动漫09最萌八强介绍

专题简介2009年最萌八强女性角色介绍最萌2009萌王决定战,轻音败退,掌中萌虎登顶钉宫党们终于等到这一天了，1332票的得票数令人刮目，作为2009最萌全程比赛中的最高得票数，掌中虎的夺冠的确是令人没法挑出毛病。而掌中虎夺冠的意义不仅仅于此，由于大河并非以小组冠军的身份夺冠，那么传说中的小组冠军萌王论自然是直接不攻自破了；另外萌王的属性论也由于大河名字的四个字无论如何也搭不上边，从而惨遭证伪，彻底宣告为伪科学。而身为以轻小说改编作品登场的《龙与虎》，也的

系统 2019-08-29 23:10:51 3139

编程技术

Google 10 周年庆专题页面讲述辉煌历史

Google搜索引擎早在本世纪初开始发展，2001年上线，至今已有10年时间，这个搜索引擎项目的启动和发展彻底改变了国际互联网的面貌，让人们可以在网络中更快速地定位到自己想要的信息。Google今天上线了一个10周年页面，详细讲述了他们的发展史，这黄金的10年Google都为我们做了些什么？Google10周年庆转自：http://www.oschina.net/news/15345/google-10-years本文是使用B3logSolo从简约设计の艺

系统 2019-08-29 23:08:17 3139

编程技术

以一种"廉价"的方式获取页面的标题(downmoon)

有朋友问到：“我需要得到一个webpage的title，因为这个title一般都比较靠前，只要取得html的前面少量内容就可以了。因为要取得很多个页面的title,如果下载整个htmlcode，肯定比较浪费时间。.net好像没有现成的类可以干这件事情(取得部分html)，我应该如何去实现？”一种比较"廉价"(即较小成本条件下)的解决思路：第一步：取出含有页面title部分的最小集合。这是“廉价”的关键！第二步：用正则表达式取出和</title</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:21:16</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3139</span></span>  </p> </article><article class="excerpt"> <header> <a title="编程技术" class="label label-important zj-del-target" href="/category/30">编程技术<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/19721" title="出百度记" target="_blank" onclick="return recordId('',)">出百度记 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/19721" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/18.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/19721';}else{window.open('/article/19721');}" style="cursor: pointer;">虽然是多年前的老文，但是看了后颇有感触，所以转贴个。===出百度记作者：本刊记者罗燕信息类别：科技发布时间：2006-12-518:27:54文字〖大中小〗自动滚屏（右键暂停）缔造中国最大搜索引擎的幕后角色们正纷纷拷贝、粘贴李彦宏的创业密码【抱憾ES】在百度内部，有这样一种说法：百度出来创业的人，大部分是ES部门的人。ES全称企业搜索，后改称企业软件事业部，百度曾投入巨大精力于其中，但终因市场限制未取得太大成就，导致其多数骨干出走，其中便包括程浩、林应明、</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 23:23:18</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3138</span></span>  </p> </article><article class="excerpt"> <header> <a title="各行各业" class="label label-important zj-del-target" href="/category/38">各行各业<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/10252" title="AABB包围盒、OBB包围盒、包围球的比較" target="_blank" onclick="return recordId('',)">AABB包围盒、OBB包围盒、包围球的比較 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/10252" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/10.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/10252';}else{window.open('/article/10252');}" style="cursor: pointer;">1)AABB包围盒:AABB包围盒是与坐标轴对齐的包围盒,简单性好,紧密性较差(尤其对斜对角方向放置的瘦长形对象,採用AABB,将留下非常大的边角空隙,导致大量不是必需的包围盒相交測试)。当物体旋转之后需对AABB进行相同的旋转并更新;当物体变形之后仅仅需对变形了的基本几何元素相应的包围盒又一次计算;然后能够自下向上由子结点的AABB合成父结点的AABB,最后进行包围盒树的更新。2)OBB包围盒:OBB碰撞检測方法紧密性是较好的,可以大大降低參与相交測试的</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 09:27:20</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3138</span></span>  </p> </article><article class="excerpt"> <header> <a title="Oracle" class="label label-important zj-del-target" href="/category/45">Oracle<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/6868" title="Oracle学习笔记：管理控制文件 ----摘自《Orac" target="_blank" onclick="return recordId('',)">Oracle学习笔记：管理控制文件 ----摘自《Orac </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/6868" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/3.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/6868';}else{window.open('/article/6868');}" style="cursor: pointer;">■修改初始化参数control_filesSQL>altersystemsetcontrol_files='/export/home/opt/product/10.1.0.3.0/oradata/ldfsys/control01.ctl','/export/home/opt/product/10.1.0.3.0/oradata/ldfsys/control02.ctl','/export/home/opt/product/10.1.0.3.0/oradat</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:53:31</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3138</span></span>  </p> </article><article class="excerpt"> <header> <a title="各行各业" class="label label-important zj-del-target" href="/category/38">各行各业<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/1996" title="FFMPEG解码流程" target="_blank" onclick="return recordId('',)">FFMPEG解码流程 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/1996" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/10.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/1996';}else{window.open('/article/1996');}" style="cursor: pointer;">http://www.douban.com/note/228831821/FFMPEG解码流程：1.注册所有容器格式和CODEC:av_register_all()2.打开文件:av_open_input_file()3.从文件中提取流信息:av_find_stream_info()4.穷举所有的流，查找其中种类为CODEC_TYPE_VIDEO5.查找对应的解码器:avcodec_find_decoder()6.打开编解码器:avcodec_open()</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:32:45</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3138</span></span>  </p> </article><div class="pagination" style="display:;"> <ul><li><a href="/search/css/1/p/1">首页</a></li> <li class="prev-page"><a href="/search/css/1/p/412">上一页</a></li> <li><a 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