<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[time block]]></title><description><![CDATA[人生就是一张演讲稿]]></description><link>https://blog.youkuaiyun.com/chen_767</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; chen_767]]></copyright><item><title><![CDATA[2017年8月18日15:20:10]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/77370423</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/77370423</guid><author>chen_767</author><pubDate>Fri, 18 Aug 2017 15:21:26 +0800</pubDate><description><![CDATA[设随机变量X的概率密度函数为: 
e−|x|te^{- \left|{x}\right|} t (-oo<x<+oo) 
则参数t为:_______import sympy as sp  
from sympy import oo
u,x,k,λ,e,s,t = sp.symbols("u x k λ e s t")
expr=t*math.e**(- abs(x))a = sp.integrate]]></description><category></category></item><item><title><![CDATA[2017年8月17日10:29:03]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/77309458</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/77309458</guid><author>chen_767</author><pubDate>Thu, 17 Aug 2017 10:33:06 +0800</pubDate><description><![CDATA[使用python 进行微积分待定系数确定等式中k的值. 
∫20ku+1du=1\int_{0}^{2} k u + 1\, du = 1import sympy as sp  
from sympy import oo
u,x,k = sp.symbols("u,x k")
a = sp.integrate(k*u+1, (u, 0, 2))
print(sp.solve(sp.Eq(a,1),k]]></description><category></category></item><item><title><![CDATA[2017年8月17日10:16:16]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/77281819</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/77281819</guid><author>chen_767</author><pubDate>Wed, 16 Aug 2017 23:27:41 +0800</pubDate><description><![CDATA[python使用latex显示微积分符号import sympy as sp  
from sympy import oo
print(sp.latex(sp.Integral(k*u+1, (u, -oo, oo))))
输出:
\int_{-\infty}^{\infty} k u + 1\, du∫∞−∞ku+1du
\int_{-\infty}^{\infty} k u + 1\, du]]></description><category></category></item><item><title><![CDATA[禁止百度云盘p2p后台上传]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/77160199</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/77160199</guid><author>chen_767</author><pubDate>Mon, 14 Aug 2017 12:14:27 +0800</pubDate><description><![CDATA[禁用p2p]]></description><category></category></item><item><title><![CDATA[脑图神器 -- freemind]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/76354828</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/76354828</guid><author>chen_767</author><pubDate>Sat, 29 Jul 2017 20:02:14 +0800</pubDate><description><![CDATA[freemind+百度云 =>增量同步, 备注可加图片]]></description><category></category></item><item><title><![CDATA[Python3多线程编程]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/74408011</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/74408011</guid><author>chen_767</author><pubDate>Wed, 05 Jul 2017 12:29:20 +0800</pubDate><description><![CDATA[多线程]]></description><category></category></item><item><title><![CDATA[Python3函数式编程]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/74394918</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/74394918</guid><author>chen_767</author><pubDate>Wed, 05 Jul 2017 11:51:57 +0800</pubDate><description><![CDATA[python3函数式编程]]></description><category></category></item><item><title><![CDATA[python3数据模型]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/74226776</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/74226776</guid><author>chen_767</author><pubDate>Mon, 03 Jul 2017 17:17:08 +0800</pubDate><description><![CDATA[python内部对象]]></description><category></category></item><item><title><![CDATA[Python3 关键字]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/74217881</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/74217881</guid><author>chen_767</author><pubDate>Mon, 03 Jul 2017 16:51:08 +0800</pubDate><description><![CDATA[python3手册的目录下面的关键字被保留, 变量名不能与之一样.False      class      finally    is         return
None       continue   for        lambda     try
True       def        from       nonlocal   while
and        del]]></description><category></category></item><item><title><![CDATA[python3手册的目录]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/74214746</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/74214746</guid><author>chen_767</author><pubDate>Mon, 03 Jul 2017 16:39:51 +0800</pubDate><description><![CDATA[python3手册的目录]]></description><category></category></item><item><title><![CDATA[Python的几种实现]]></title><link>https://blog.youkuaiyun.com/chen_767/article/details/74182306</link><guid>https://blog.youkuaiyun.com/chen_767/article/details/74182306</guid><author>chen_767</author><pubDate>Mon, 03 Jul 2017 12:07:43 +0800</pubDate><description><![CDATA[Python的几种实现Python是一种编程语言. 本身可以有多种实现, 有个叫CPython的实现用的最多. 叫CPython是用于区别于Python语言本身. CPython是可以执行的. Python是语言的定义, 规范.CPython是官方的实现, 就是从 python.org下载的那个. 其他的还有 Jython, IronPython 和 PyPy. CPythonCPython是使用c]]></description><category></category></item></channel></rss>