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index.html
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<!DOCTYPE html>
<html lang="en">
<!-- Head tag -->
<head>
<!-- hexo-inject:begin --><!-- hexo-inject:end --><meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="google-site-verification" content="GeLUEEMppZkm_pdKdcvX8J5Qtqt5zSPvDnWvyDs2vh4" />
<meta name="baidu-site-verification" content="GAyfJmGR5b" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="keyword" content="">
<link rel="shortcut icon" href="/img/favicon.ico">
<title>
软间阁 | Soft Margin
</title>
<link rel="canonical" href="http://softmargin.com/">
<!-- Bootstrap Core CSS -->
<link rel="stylesheet" href="/css/bootstrap.min.css">
<!-- Custom CSS -->
<link rel="stylesheet" href="/css/hux-blog.min.css">
<!-- Pygments Highlight CSS -->
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<!-- Custom Fonts -->
<!-- <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css" rel="stylesheet" type="text/css"> -->
<!-- Hux change font-awesome CDN to qiniu -->
<link href="https://cdn.staticfile.org/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet" type="text/css">
<!-- add by Surflyan-->
<link href="/js/google-code-prettify/prettify.css" type="text/css" rel="stylesheet" />
<link href="/js/google-code-prettify/tomorrow-night-eighties.min.css" type="text/css" rel="stylesheet" />
<!-- Hux Delete, sad but pending in China
<link href='http://fonts.googleapis.com/css?family=Lora:400,700,400italic,700italic' rel='stylesheet' type='text/css'>
<link href='http://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800' rel='stylesheet' type='text/
css'>
-->
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
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<![endif]-->
<!-- ga & ba script hoook -->
<script></script><!-- hexo-inject:begin --><!-- hexo-inject:end -->
</head>
<!-- hack iOS CSS :active style -->
<body ontouchstart="">
<!-- hexo-inject:begin --><!-- hexo-inject:end --><!-- Navigation -->
<nav class="navbar navbar-default navbar-custom navbar-fixed-top">
<div class="container-fluid">
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<div class="navbar-header page-scroll">
<button type="button" class="navbar-toggle">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/">软间阁 - Soft Margin</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<!-- Known Issue, found by Hux:
<nav>'s height woule be hold on by its content.
so, when navbar scale out, the <nav> will cover tags.
also mask any touch event of tags, unfortunately.
-->
<div id="huxblog_navbar">
<div class="navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li>
<a href="/">Home</a>
</li>
<li>
<a href="/archives/">Archives</a>
</li>
<li>
<a href="/about/">About</a>
</li>
<li>
<a href="/tags/">Tags</a>
</li>
</ul>
</div>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container -->
</nav>
<script>
// Drop Bootstarp low-performance Navbar
// Use customize navbar with high-quality material design animation
// in high-perf jank-free CSS3 implementation
var $body = document.body;
var $toggle = document.querySelector('.navbar-toggle');
var $navbar = document.querySelector('#huxblog_navbar');
var $collapse = document.querySelector('.navbar-collapse');
$toggle.addEventListener('click', handleMagic)
function handleMagic(e){
if ($navbar.className.indexOf('in') > 0) {
// CLOSE
$navbar.className = " ";
// wait until animation end.
setTimeout(function(){
// prevent frequently toggle
if($navbar.className.indexOf('in') < 0) {
$collapse.style.height = "0px"
}
},400)
}else{
// OPEN
$collapse.style.height = "auto"
$navbar.className += " in";
}
}
</script>
<!-- Main Content -->
<!-- Create by Surflyan -->
<!-- Post Header -->
<style type="text/css">
header.intro-header{
/*background-image: url('{{ site.baseurl }}/{% if page.header-img %}{{ page.header-img }}{% else %}{{ site.header-img }}{% endif %}')*/
height: 500px;
overflow: hidden;
}
header iframe{
width: 100%;
height: 100%;
border: 0;
}
</style>
<header class="intro-header" >
<iframe src="https://surflyan.github.io/blog-index-jeveal/" />
</iframe>
</header>
<!-- Main Content -->
<div class="container">
<div class="row">
<!-- USE SIDEBAR -->
<!-- Post Container -->
<div class="
col-lg-8 col-lg-offset-1
col-md-8 col-md-offset-1
col-sm-12
col-xs-12
post-container
">
<!--layout: page -->
<!-- Main Content -->
<div class="post-preview">
<a href="/2018/01/04/关于博客地址变更/">
<h2 class="post-title">
关于博客地址变更
</h2>
<h3 class="post-subtitle">
博客启用新域名
</h3>
<div class="post-content-preview">
感谢你的访问,博客已迁移到个人服务器上,并启用新域名 www.SoftMargin.com, Github Page 上的博客停止更新。
欢迎访问 软间阁-Soft Margin
...
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2018-01-04
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2018/01/02/部署hexo到VPS/">
<h2 class="post-title">
部署hexo到VPS
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
1. 前言终于再次折腾了下博客。到 google analytics 上看了下这一年来的浏览量,还可以,但是全部来源于google,没有来自百度的记录。查了下,果然百度没有收录任何一篇博客。这是因为 github page 限制了百度爬虫。于是,决定将博客部署到个人VPS上。
既然决定要将 hexo blog 部署到 vps上,那么如何实现自动部署是我们所关注的。可以在 vps 搭个 Git......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2018-01-02
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2017/12/24/高斯混合模型及其EM算法/">
<h2 class="post-title">
高斯混合模型及其EM算法
</h2>
<h3 class="post-subtitle">
高斯混合模型分析及其EM算法Python实现
</h3>
<div class="post-content-preview">
1. 高斯分布高斯分布(Gaussian Distribution),又称为正态分布。若随机变量 X 服从一个位置参数为$\mu$ 、尺度参数为$\sigma$的概率分布,记为:
X\sim N(\mu ,\sigma ^{2})则其概率密度函数为:
f(x)=\frac{1}{\sigma\sqrt{2\pi}} e^{-\frac{(x-\mu)^{2}}{2\sigma}}正态分布的数......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2017-12-24
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2017/12/18/PCA原理分析及Python实现/">
<h2 class="post-title">
PCA原理分析及Python实现
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
1. 降维的意义绝大多数机器学习方法在满足密采样的情况下,都能取得出色的分类效果。但是,在现实应用中,属性维度经常成千上万,要满足密采样条件所需的样本数目是不可能达到的。而且,很多机器学习方法都需要进行距离计算,而高维空间下的距离计算往往并不是那么容易。这被称为维数灾难。缓解维数灾难的一个重要途径是降维。
降维的好处:
增加样本密度。舍弃部分信息之后,能使样本的采样密度变大,这是降维的重要......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2017-12-18
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2017/12/07/逻辑斯蒂回归分析及Python实现/">
<h2 class="post-title">
逻辑斯蒂回归分析及Python实现
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
1. 核心思想上一篇讲到了线性回归,本篇要讲的是分类问题。于是我们想到了能否使用线性回归来处理分类问题,事实上并不可行,由于在线性模型中,预测模型会出现任意值,而二分类模型中,y 的取值有只有 0 或者 1, 因此线性回归模型不适用于分类问题。但是如果能将线性回归的结果映射到(0,1)区间,那么就可以帮助我们进行分类了。问题的关键就变成了寻找一个具有良好数学性质的映射函数的选择。
2. 逻......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2017-12-07
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2017/11/25/自动生成白盒测试基本路径程序的实现/">
<h2 class="post-title">
自动生成白盒测试基本路径程序的实现
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
1. 白盒测试白盒测试就是把测试对象看作一个透明的盒子,允许测试人员利用程序内部的逻辑及有关信息,设计或选择测试用例,对所有逻辑路径进行测试。白盒测试主要对程序做如下检查:
对模块的每一个独立执行路径至少测试一次;
对所有逻辑判定的每一个分支 (真与假 )都至少测试一次;
在循环的边界和运行界限内执行循环体;
测试内部数据结构的有效性;
2. 基本路径测试法路径测试:设计足够多的用例,使......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2017-11-25
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2017/11/15/线性回归之多项式拟合曲线/">
<h2 class="post-title">
线性回归之多项式拟合曲线
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
1. 线性回归模型通常变量之间存在着某种关系,可以使用线性方程来描述这种关系。
1.1 函数模型对于多样本数据,可写成矩阵形式:
1.2 损失函数需要根据样本数据,来找到一条曲线拟合这些数据,因此需要一个标准来刻画曲线与实际值的距离。 损失函数(loss function) :刻画拟合曲线与目标label 距离的函数。使用残差平方和作为loss function
因此,现在目标就变成了求出......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2017-11-15
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2017/11/02/面向对象的分析与设计/">
<h2 class="post-title">
面向对象程序开发的分析与设计
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
本文主要根据课程《软件工程》所学,介绍了OO设计的思想以及常采用的流程,希望此文能对你的OO开发小有裨益。
1. 结构化程序开发 结构化分析方法 :将待解决的问题看作一个系统,从而用系统科学的思想方法(抽象、分解、模块化)来分析和解决问题。 结构化分析核心思想 :自顶向下的分解 结构化程序开发的特点 :
软件作为处理数据的流,将之定义未一系列步骤构成的算法;
每一个步骤是带有预定......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2017-11-02
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2017/10/10/Git基本命令/">
<h2 class="post-title">
Git基本命令
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
git 的“三”三种状态
已提交(committed):表示该文件已经被安全地保存在本地数据库中了;
已修改(modified):表示修改了某个文件,但还没有提交保存;
已暂存(staged):表示把已修改的文件放在下次提交时要保存的清单中。
三个工作区域:
工作目录(只有一个)
暂存区域
版本库
git 撤销操作# 撤回暂存区文件
git reset HEAD <file&......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2017-10-10
</p>
</div>
<hr>
<div class="post-preview">
<a href="/2017/10/02/七步完成Java-Web部署/">
<h2 class="post-title">
七步完成Java Web部署
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
第一步: 购买 VPS可以选择国外服务器提供商,相较国内,价格更优,还能做其他国内服务器做不了的事情。
第二步:安装 SSH 客户端和文件传输工具接下来,安装 SSH 客户端,实现远程管理 Linux 主机。mac 自带终端可以进行远程管理。还需要一个网络文件传输工具。作为本地 windows 系统和远程 Linux 主机文件传输的桥梁。个人选择 Xshell 和 Xftp 来管理远程服务器......
</div>
</a>
<p class="post-meta">
Posted by Surflyan on
2017-10-02
</p>
</div>
<hr>
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