Posts
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How to synchronize time between Windows and Linux dual systems
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Install Win10 from USB on Thinkpad-8
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Calc Eigenvalues and Eigenvectors of Matrix via Matlab or Python
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Judge whether an integer is odd or not
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How to install package in Pythonista
On Ubuntu:
$ sudo apt-get install ntpadate //update time on Ubuntu
$ sudo ntpdate time.windows.com
$ sudo hwclock --localtime --systohc //update local time to hardware
UEFI system cannot boot from an NTFS formatted USB stick. We need to format it using FAT32.
Used a new USB disk creation program (https://rufus.akeo.ie) and set it to FAT32 for UEFI and
finnaly the tablet booted to the setup. The Windows 10 was formatting the sticks to NTFS.
More infomation about Clean Install of Windows 10 on ThinkPad.
Matlab code
% Calc eigenvalues and eigenvectors of Hamiltonian
syms Omega1 Omega2
H = zeros(4,'sym');
H(2,3) = Omega1;
H(3,2) = Omega1;
H(3,4) = Omega2;
H(4,3) = Omega2;
[V,D] = eig(H);
disp(D);
disp(V);
Python code
# coding: utf-8
import sympy as sp
Omega1 = sp.symbols('Omega1')
Omega2 = sp.symbols('Omega2')
M = sp.zeros(4,4)
M[1,2] = Omega1
M[2,1] = Omega1
M[2,3] = Omega2
M[3,2] = Omega2
print(M.eigenvals())
print(M.eigenvects())
# coding: utf-8
'''
file: test.py
create on Tue Mar 26 8:00 2019
@author: Xiao Shang
email: me@ishxiao.com
note: Judge whether an integer is odd or not
'''
# ver 0.1
def isOdd_1(i):
if(i%2 == 1):
return True
else:
return False
# ver 0.2
def isOdd_2(i):
return i%2 == 1
# ver 0.3
def isOdd_3(i):
return i%2 == 1 or i%2 == -1
# ver 0.4
def isOdd_4(i):
return i%2 != 0
# ver 0.5
def isOdd_5(i):
return i>>1 << 1 != i
# ver 0.6
def isOdd_6(i):
return i&1 != 0
首先，启动Pythonista，然后左滑屏幕，调出console窗口，在底部>处输入
import requests as r;
exec(r.get('https://raw.githubusercontent.com/ywangd/stash/master/getstash.py').text)
然后，点击屏幕左上角的，选择“This iPad”，运行“launch_stash.py”，即打开命令窗口，在此窗口中可运行“pip install 库名”等命令