<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[US_579的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/US_579</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; US_579]]></copyright><item><title><![CDATA[Vitberi Algorithem]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/89486462</link><guid>https://blog.youkuaiyun.com/US_579/article/details/89486462</guid><author>US_579</author><pubDate>Wed, 24 Apr 2019 09:43:34 +0800</pubDate><description><![CDATA[Vitberi Algorithem
the code is in link below
https://github.com/US579/DataMining-Project
How to run
Dataset in this case :
State_File ='./toy_example/State_File'
Symbol_File='./toy_example/Symbol_File...]]></description><category></category></item><item><title><![CDATA[如何对cprofile生成文件进行分析]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/89053355</link><guid>https://blog.youkuaiyun.com/US_579/article/details/89053355</guid><author>US_579</author><pubDate>Sat, 06 Apr 2019 11:17:42 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[NAT MASQUERADE]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/89040045</link><guid>https://blog.youkuaiyun.com/US_579/article/details/89040045</guid><author>US_579</author><pubDate>Fri, 05 Apr 2019 09:14:07 +0800</pubDate><description><![CDATA[SNAT是source network address translation的缩写即源地址目标转换
比如，多个PC机使用ADSL路由器共享上网，每个PC机都配置了内网IP。PC机访问外部网络的时候，路由器将数据包的报头中的源地址替换成路由器的ip。当外部网络的服务器比如网站web服务器接到访问请求的时候，他的日志记录下来的是路由器的ip地址，而不是pc机的内网ip。
这是因为，这个服务器收到的数...]]></description><category></category></item><item><title><![CDATA[Multinomial naive bayes classifier]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/89040025</link><guid>https://blog.youkuaiyun.com/US_579/article/details/89040025</guid><author>US_579</author><pubDate>Fri, 05 Apr 2019 09:11:48 +0800</pubDate><description><![CDATA[LAB 4
Multinomial naive bayes classifier to predict spam SMS.WE implement a unigram model here
1.we need to caculate following

which is the probility of class_i occur in all document , in this case w...]]></description><category></category></item><item><title><![CDATA[logistics Regression using Gradient Descent]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/88824957</link><guid>https://blog.youkuaiyun.com/US_579/article/details/88824957</guid><author>US_579</author><pubDate>Tue, 26 Mar 2019 17:12:00 +0800</pubDate><description><![CDATA[回归来源于"线性回归"的z=XW,使用线性回归去拟合逼近一个’界’,使得按照这个界进行数据分类后得到的cost最小(决策边界).

Function:
for two way classification and  give it realtive probablities.
such as

differentiate whether it is junk mail
distinguish w...]]></description><category></category></item><item><title><![CDATA[数据变换]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/88653820</link><guid>https://blog.youkuaiyun.com/US_579/article/details/88653820</guid><author>US_579</author><pubDate>Tue, 19 Mar 2019 06:23:18 +0800</pubDate><description><![CDATA[数据变换
min-max normalization

v is input value
new_max and new_min 是线性变换后的区间长度, 最小-最大规范化就是对原始数据区间进行线性变换。

z-score normalization



此情况是在属性 A 的最大和最小值未知,或局外者左右了最大-最小规范化时使用
normalization by decimal scaling...]]></description><category></category></item><item><title><![CDATA[GSOE9820 Project management期中复习]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/88606512</link><guid>https://blog.youkuaiyun.com/US_579/article/details/88606512</guid><author>US_579</author><pubDate>Sat, 16 Mar 2019 21:41:21 +0800</pubDate><description><![CDATA[Various definations
1
1.Critical path 选择total slack为0的即2-5-10
2.整个project duration为critical path的时长,即完成这整个项目所需要最短(也就是需要的最长时间)的时间 为 44
3.LF(late finish)即为方框右下角的那个数字activity 3
Answer :15
4.FS(Free slack...]]></description><category></category></item><item><title><![CDATA[SSL/TLS原理详解]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/88597048</link><guid>https://blog.youkuaiyun.com/US_579/article/details/88597048</guid><author>US_579</author><pubDate>Sat, 16 Mar 2019 13:58:22 +0800</pubDate><description><![CDATA[https://segmentfault.com/a/1190000002554673

]]></description><category></category></item><item><title><![CDATA[MAC 和 HMAC 的区别]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/88593358</link><guid>https://blog.youkuaiyun.com/US_579/article/details/88593358</guid><author>US_579</author><pubDate>Sat, 16 Mar 2019 10:35:39 +0800</pubDate><description><![CDATA[MAC
message authentication code
the propurse of MAC is to verify the intergrity of the message
sender

use the hash function to get H(m)
concate message and H(m)
send the H(m) + m to the receiver

rec...]]></description><category></category></item><item><title><![CDATA[Optimal binning algorithm using dynamic programming]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/88428294</link><guid>https://blog.youkuaiyun.com/US_579/article/details/88428294</guid><author>US_579</author><pubDate>Tue, 12 Mar 2019 20:21:21 +0800</pubDate><description><![CDATA[COMP9318-19T1
LAB2

Optimal binning algorithm using dynamic programming

Error Sum of Squares (SSE)
SSE is the sum of the squared differences between each observation and its group’s mean. It can be u...]]></description><category></category></item><item><title><![CDATA[AES,DES,3DES加密方式的特点]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/88135606</link><guid>https://blog.youkuaiyun.com/US_579/article/details/88135606</guid><author>US_579</author><pubDate>Mon, 04 Mar 2019 20:07:30 +0800</pubDate><description><![CDATA[SUMMARY
DES：Data Encryption Standard（数据加密标准，又美国国密局，选中的IBM的方案，密钥长度为56，标准提出是要使用64位长的密钥，注意: 实际中DES算法只用了64位中的56位密钥)
3DES：trip DES（3级DES,是DES的升级版，主要是为了应对快速发展的计算机能力，能够在24小时内暴力破解传统的56位长度密钥的DES,而3DES相当于对统一数据块...]]></description><category></category></item><item><title><![CDATA[WK01: Crypto Building Blocks]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/87891961</link><guid>https://blog.youkuaiyun.com/US_579/article/details/87891961</guid><author>US_579</author><pubDate>Sat, 23 Feb 2019 14:28:56 +0800</pubDate><description><![CDATA[@ WK01: Crypto Building Blocks
Public key and Prviate key
公钥私钥是不对称的
不对称指的是用一把钥匙锁住必须用另一把钥匙打开
Alic拥有Bob的公钥,利用Bob的公钥加密plaintext m,再将m发送给Bob,只有用Bob的私钥才能重新获得明文m.(用Bob的公钥解密是解不开的)

-为私钥 +为公钥
disadvantage: th...]]></description><category></category></item><item><title><![CDATA[解码器测试流程]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/85148998</link><guid>https://blog.youkuaiyun.com/US_579/article/details/85148998</guid><author>US_579</author><pubDate>Fri, 21 Dec 2018 00:01:56 +0800</pubDate><description><![CDATA[测试流程

传送prop_list=1参数给decoder

发送请求时，需要配置prop_list传1，prop_list传成功的话，解码器的日志里会打印 &quot;set active branch:&quot;字样

                                                                                                 ...]]></description><category></category></item><item><title><![CDATA[OPEN文件操作(Python)]]></title><link>https://blog.youkuaiyun.com/US_579/article/details/82932390</link><guid>https://blog.youkuaiyun.com/US_579/article/details/82932390</guid><author>US_579</author><pubDate>Wed, 03 Oct 2018 16:35:29 +0800</pubDate><description><![CDATA[#OPEN文件操作(Python)
f = open('file_name ','读写模式')

#读写模式:r只读,r+读写,w新建(会覆盖原始文件如果有的话),a追加,b二进制文件.
w = write 写
r = read 读
b = bytes 二进制
a = append 追加
‘##### 读写模式类型:’
rU 或 Ua 以读方式打开
w     以写方式打开，
a     以追加模...]]></description><category></category></item></channel></rss>