原创 Crawl GB2312 encoded webpages with Python 3.x
The following code works well. from urllib.request import urlopen import bs4 doc= urlopen("http://www.w3school.com.
2020-06-21 07:06:28
1
原创 Hidden terminal and Exposed terminal
Exposed terminal [figure from https://en.wikipedia.org/wiki/Exposed_node_problem] S1 is transmitting packages to R1, S
2020-06-21 07:06:28
原创 Using pip to install Python packages on Anaconda
Windows Platform: cd C:\Users\jack\AppData\Local\Continuum\Anaconda2\pythonw.exe C:\Users\yfeng14\AppData\Local\Continu
2020-06-21 07:06:18
原创 [A Weird Bug] caused by the name of Python script
I attempt to run a Python LDA module after 'pip install lda'. But there al
2020-06-21 07:06:18
1
原创 CSMA (carrier sense multiple access)
CSMA (carrier sense multiple access) is a probabilistic media access control protocol, which verifies the absence of tr
2020-06-21 07:06:18
原创 Parallel Python for loop
An example on Windows: from joblib import Parallel, delayed import multiprocessing data = range(100) def process
2020-06-21 07:06:18
3
原创 Python 3.5 deleting specified files recursively
Starting with Python 3.5, glob module supports the '**' directive, which matches any files and zero or more directories
2020-06-21 07:06:18
原创 C++ 11 : create all possible k combinations of n items
#include <iostream> #include <algorithm> #include <vector> main () { int nn = 5; int r = 3; std::vector<int> v_rea
2020-02-22 13:34:37
原创 MACAW (multiple access with collision avoidance fro Wireless)
Compared with MACA, the MACAW mainly optimizes the backoff algorithm and designs RTS-CTS-DS-DATA-ACK message exchange.
2020-02-22 13:34:27
原创 Tips for writing efficient Python code
Find the difference of keys between two dictionaries Suppose two dictionaries A and B. We would like to find the keys i
2020-02-22 13:34:27
原创 Fill Countries in Python Basemap
I googled many Python methods to color countries in a world map. But most of them require additional Python packages, l
2020-02-22 13:34:27
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原创 MACA (Multiple Access with Collision Avoidance)
MACA (Multiple access with collision avoidance) is a slotted media access control protocol with collision avoidance for
2020-02-22 13:34:27
原创 C++ 11 : call a function on every item of a vector
vector<int> nums = {1, 2, 3, 4}; std::for_each(nums.begin(), nums.end(), [](int &n) { n = -n; }); for (int element :
2020-02-22 13:34:27
原创 Crawl AJAX dynamic web page using Python 2.x and 3.x
The term AJAX is short for Asynchronous Javascript and XML. It uses the Javascript XMLHttpRequest function to create a
2020-02-22 13:34:27
1
原创 The Concept of Indistinguishability under Chosen Plaintext Attack (IND-CPA)
First, the concept of the Semantic Security means the knowledge of the ciphertext of unknown message does not reveal an
2020-02-22 13:34:27