<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[1.02^365=1377.41]]></title><description><![CDATA[Engineers are versatile minds who create links between science, technology, and society]]></description><link>https://blog.youkuaiyun.com/napoay</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; napoay]]></copyright><item><title><![CDATA[统计机器学习-4-三维绘图]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/102642482</link><guid>https://blog.youkuaiyun.com/napoay/article/details/102642482</guid><author>napoay</author><pubDate>Sat, 19 Oct 2019 20:15:24 +0800</pubDate><description><![CDATA[用python绘制三维函数图像:
Z=X2+Y2
Z = X^2 + Y^2
Z=X2+Y2
import matplotlib as mpl
from mpl_toolkits.mplot3d import Axes3D
import numpy as np
import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.gca(proje...]]></description><category></category></item><item><title><![CDATA[统计机器学习-3-numpy100题]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/89742042</link><guid>https://blog.youkuaiyun.com/napoay/article/details/89742042</guid><author>napoay</author><pubDate>Thu, 02 May 2019 00:38:26 +0800</pubDate><description><![CDATA[numpy 100道练习题
这100道练习题从numpy的mailing list、Stack Overflow和numpy官方文档收集而来，其目的是提供一个快速入门的参考文档为numpy学习者，也可以用作教学练习题。
如果你发现错误或者有更好的解法，欢迎在github上提交issue: https://github.com/rougier/numpy-100
1.如何导入numpy包？
impo...]]></description><category></category></item><item><title><![CDATA[统计机器学习-2-矩阵范数与导数]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/89740934</link><guid>https://blog.youkuaiyun.com/napoay/article/details/89740934</guid><author>napoay</author><pubDate>Wed, 01 May 2019 21:47:20 +0800</pubDate><description><![CDATA[矩阵基础
矩阵的知识是从行列式而来，矩阵和行列式的区别在于矩阵是一张表，行列式是一个数:
(A)[993426719]
  \begin{bmatrix}
   9 &amp;amp; 9 &amp;amp; 3\\
   4 &amp;amp; 2 &amp;amp; 6 \\
   7 &amp;amp; 1 &amp;amp; 9
  \end{bmatrix} \tag{A}
⎣⎡​947...]]></description><category></category></item><item><title><![CDATA[统计机器学习-1-统计机器学习基础]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/89612958</link><guid>https://blog.youkuaiyun.com/napoay/article/details/89612958</guid><author>napoay</author><pubDate>Sun, 28 Apr 2019 00:08:54 +0800</pubDate><description><![CDATA[一、统计机器学习的研究内容

网络 算法 机器 优化 概率 统计
数据 矩阵 信息 模型 推理
获知识 靠学习

We are drowning in information and  starving for knowledge.  -John Naisbitt
Data  -&gt; Model -&gt; Knowledge
二、机器学习与应用统计学对比




ML
STATISTICS
...]]></description><category></category></item><item><title><![CDATA[MySQL根据字段名查找数据库名和表名]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/88379817</link><guid>https://blog.youkuaiyun.com/napoay/article/details/88379817</guid><author>napoay</author><pubDate>Sun, 10 Mar 2019 16:12:21 +0800</pubDate><description><![CDATA[SELECT DISTINCT TABLE_SCHEMA,TABLE_NAME 
		FROM information_schema.COLUMNS
		WHERE COLUMN_NAME = '要查找的字段名称' 


]]></description><category></category></item><item><title><![CDATA[Python 风格规范(Google)]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/88018447</link><guid>https://blog.youkuaiyun.com/napoay/article/details/88018447</guid><author>napoay</author><pubDate>Thu, 28 Feb 2019 11:05:17 +0800</pubDate><description><![CDATA[本项目并非 Google 官方项目, 而是由国内程序员凭热情创建和维护。
如果你关注的是 Google 官方英文版, 请移步 Google Style Guide
以下代码中 Yes 表示推荐，No 表示不推荐。

分号
不要在行尾加分号, 也不要用分号将两条命令放在同一行。
行长度
每行不超过80个字符
以下情况除外：
长的导入模块语句
注释里的URL
不要使用反斜杠连接行。
Python会将...]]></description><category></category></item><item><title><![CDATA[机器学习之KNN鸢尾花分类]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/87904704</link><guid>https://blog.youkuaiyun.com/napoay/article/details/87904704</guid><author>napoay</author><pubDate>Sun, 24 Feb 2019 16:34:28 +0800</pubDate><description><![CDATA[KNN简介

邻近算法，或者说K最近邻(kNN，k-NearestNeighbor)分类算法是数据挖掘分类技术中最简单的方法之一。所谓K最近邻，就是k个最近的邻居的意思，说的是每个样本都可以用它最接近的k个邻居来代表。
kNN算法的核心思想是如果一个样本在特征空间中的k个最相邻的样本中的大多数属于某一个类别，则该样本也属于这个类别，并具有这个类别上样本的特性。该方法在确定分类决策上只依据最邻近的一...]]></description><category></category></item><item><title><![CDATA[python处理搜狗新闻数据_140万条]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/87185082</link><guid>https://blog.youkuaiyun.com/napoay/article/details/87185082</guid><author>napoay</author><pubDate>Wed, 13 Feb 2019 15:35:01 +0800</pubDate><description><![CDATA[一、文件处理
gzip -d SogouCA.tar.gz
tar -xvf SogouCA.tar
cat *.txt &amp;gt; SogouCA.txt
cat SogouCA.txt | iconv -f gbk -t utf-8 -c &amp;gt; SougouCA_UTF8.txt

二、数据清理与入库
建表:
CREATE TABLE `news` (
  `id` int(10) NOT ...]]></description><category></category></item><item><title><![CDATA[canal配置]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/85853061</link><guid>https://blog.youkuaiyun.com/napoay/article/details/85853061</guid><author>napoay</author><pubDate>Sat, 05 Jan 2019 15:08:00 +0800</pubDate><description><![CDATA[一、MySQL密码策略修改
set global validate_password_policy=0;
set global validate_password_length=1;

二、安装canal server
CREATE USER canal IDENTIFIED BY 'canal';  
GRANT SELECT, SHOW VIEW, REPLICATION SLAVE, REP...]]></description><category></category></item><item><title><![CDATA[MySQL主从(MS)、主主(MM)复制]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/85227607</link><guid>https://blog.youkuaiyun.com/napoay/article/details/85227607</guid><author>napoay</author><pubDate>Sun, 23 Dec 2018 23:12:02 +0800</pubDate><description><![CDATA[一、安装MySQL 5.7

如果安装过mysql,删除
停掉mysql进程:

pkill -9 mysqld

删除mysql:
rpm -qa|grep -i mysql
yum -y remove
mysql-community-client-5.6.38-2.el7.x86_64

依次卸载 直到没有

yum安装

cd /usr/local/src/

wget http://rep...]]></description><category></category></item><item><title><![CDATA[zookeeper概念、应用场景、数据组织、集群搭建、客户端操作、Java客户端、curator]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/84404277</link><guid>https://blog.youkuaiyun.com/napoay/article/details/84404277</guid><author>napoay</author><pubDate>Fri, 23 Nov 2018 22:03:54 +0800</pubDate><description><![CDATA[一、zookeeper简介
1.1 zookeeper简介
Apache的很多项目以动物来命令，比如Hadoop(大象)、Hive(小蜜蜂)、Pig(猪猪)，这些项目都是hadoop生态系统的成员。Hadoop生态系统是为了解决大数据存储、大数据计算和大数据数据分析的，解决大数据问题的核心思想是分布式，而分布式系统的开发中一个关键问题是如何解决数据在不同系统之间的一致性问题。zookeeper顾名...]]></description><category></category></item><item><title><![CDATA[mac安装fabric找不到fabric.api]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/83090693</link><guid>https://blog.youkuaiyun.com/napoay/article/details/83090693</guid><author>napoay</author><pubDate>Tue, 16 Oct 2018 16:29:22 +0800</pubDate><description><![CDATA[
先卸载再安装低版本：
pip uninstall fabric
pip install fabric==1.14.0


]]></description><category></category></item><item><title><![CDATA[Lucene索引合并]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/82019120</link><guid>https://blog.youkuaiyun.com/napoay/article/details/82019120</guid><author>napoay</author><pubDate>Fri, 24 Aug 2018 15:07:35 +0800</pubDate><description><![CDATA[    @Test
    public void mergeIndex() throws IOException {
        Analyzer analyzer=new HanLPAnalyzer();
        IndexWriterConfig icw = new IndexWriterConfig(analyzer);
        icw.setOpenMode(Inde...]]></description><category></category></item><item><title><![CDATA[Elasticsearch电商搜索分词效果调优]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/81136638</link><guid>https://blog.youkuaiyun.com/napoay/article/details/81136638</guid><author>napoay</author><pubDate>Mon, 06 Aug 2018 00:17:59 +0800</pubDate><description><![CDATA[分词是搜索中非常核心的一步，下面通过一个案例介绍在没有专业分词系统的情况下，如何做分词性能的调优。]]></description><category></category></item><item><title><![CDATA[javax.jms.JMSException: Could not connect to broker URL: tcp://localhost:61616]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/81122541</link><guid>https://blog.youkuaiyun.com/napoay/article/details/81122541</guid><author>napoay</author><pubDate>Thu, 19 Jul 2018 20:50:49 +0800</pubDate><description><![CDATA[spring.activemq.broker-url=tcp://localhost:61616

改为：


spring.activemq.broker-url=tcp://0.0.0.0:61616]]></description><category></category></item><item><title><![CDATA[spring boot获取resource目录下文件]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/81048724</link><guid>https://blog.youkuaiyun.com/napoay/article/details/81048724</guid><author>napoay</author><pubDate>Sat, 14 Jul 2018 23:38:23 +0800</pubDate><description><![CDATA[        Resource resource = new ClassPathResource(&amp;quot;resource目录下的文件路径&amp;quot;);
        File file = resource.getFile();

例如：resource目录下： a/1.txt

获取1.txt文件的方法：

 Resource resource = new ClassPathResource(&amp;quot;a/1....]]></description><category></category></item><item><title><![CDATA[spring boot 工程创建、常用注解、控制器、模板引擎使用]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/80877440</link><guid>https://blog.youkuaiyun.com/napoay/article/details/80877440</guid><author>napoay</author><pubDate>Mon, 02 Jul 2018 14:01:35 +0800</pubDate><description><![CDATA[最近要狂补Spring boot了，总结一下相关知识点。



一、工程创建与运行

访问：http://start.spring.io/



按如图所示，配置好项目信息，生成project。 
Dependencies里面选择项目依赖，一般初始化工程的时候加上web即可。

解压下载好的代码，用IDEA打开。 


新建一个Hello.java的Controller类：

package co...]]></description><category></category></item><item><title><![CDATA[Elasticsearch 同义词配置]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/80825381</link><guid>https://blog.youkuaiyun.com/napoay/article/details/80825381</guid><author>napoay</author><pubDate>Wed, 27 Jun 2018 10:29:56 +0800</pubDate><description><![CDATA[什么是同义词就不用说了，直接说怎么实现。

测试环境：ES 5.5.1 

一、同义词词库

准备一个同义词词库，每行一个同义词词组，例子syno.dic:

西红柿,番茄,tomato
马铃薯,土豆



二、配置分析器

DELETE syno

PUT syno
{
  &amp;quot;settings&amp;quot;: {
    &amp;quot;analysis&amp;quot;: {
      &amp;quot;filter&amp;quot;: {
        &amp;]]></description><category></category></item><item><title><![CDATA[StringUtils中的常用方法]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/80824501</link><guid>https://blog.youkuaiyun.com/napoay/article/details/80824501</guid><author>napoay</author><pubDate>Wed, 27 Jun 2018 09:47:19 +0800</pubDate><description><![CDATA[StringUtils.hasText(str)

如果字符串里面的值为null， “”， ”   “，那么返回值为false；否则为true

containsWhitespace(str)

是否包含空格]]></description><category></category></item><item><title><![CDATA[解决ES-Hadoop打包报错“Mkdirs failed to create /var/folders...”问题]]></title><link>https://blog.youkuaiyun.com/napoay/article/details/80390741</link><guid>https://blog.youkuaiyun.com/napoay/article/details/80390741</guid><author>napoay</author><pubDate>Mon, 21 May 2018 13:08:43 +0800</pubDate><description><![CDATA[一、报错问题

在mac下运行ES-Hadoop项目，报错如下：

Bee:eshadoop bee$ hadoop jar target/eshadoop-1.0-SNAPSHOT-jar-with-dependencies.jar /work/blog.json
Exception in thread &amp;quot;main&amp;quot; java.io.IOException: Mkdirs failed to c...]]></description><category></category></item></channel></rss>