Pontryagin’s Maximum Principle Pontryagin’s Maximum Principle (PMP) is one of the most important parts in OCP solving. Based on variational method, PMP allows us to solve OCPs whose objective func...

The Very Beginning GPOPS-II is a MATLAB software based on Gauss pseudo-spectral method, mainly used on solving optimal control problems (OCP). This blog is a summary of the documentation of GPOPS-...

Original Problem Create a dataset. Achieve three functions: Insert: put one element into the dataset. Delete: delete all the corresponding elements from the dataset. Search: check the data...

Original Problem: The Shenzhou VI spacecraft is one of the Shenzhou spacecraft series, consisting of orbital module, re-entry capsule and escape tower. The re-entry capsule is where astronauts ...

Origianl Problem Give you a number $n$, print the full permutation of the number list $(1\to n)$. My Solution Here we use recursion. My source code is listed below: #!/usr/bin/env python3 """...

Problom 1 Wrong number Original Problem: Give you a string, extract all the negative numbers from the string. e.g. (Source code: THU OJ) Input: This line contains 1 integer "one". This line co...

Original Problem Given a number list, you can confirm a binary search tree. Now given two specified elements, you have to find the lowest common ancestor.  My Solution Source code is listed belo...

Four steps when you build and run your code: Pre-processing Compiling Assembling Linking Mostly bugs may happen in step 2 and 4. Why Mac treat warning as ERROR when compi...

Whenever you copy code from others,  you have to cite the source ! For details, please go to: MIT Code Writing Handbook. What should be provided URL Date of retrieval ( If you adapte...

Some bugs you are going to encounter (Thanks for Danny Wu's image on his blog:https://www.idannywu.com//1203.html?preview=true) Here we use DELL computer to install Ubuntu 20.04. For installat...