Tag: programming | Page 0
Post #2
Optimization Learning Notes 1
book Public Date: 2020-06-20 08:42:04.801901
update Update Date: 2020-07-30 15:33:51.919974
Modeling
Mathematically, an optimization problem is usually represented as:
$$
\begin{aligned}
\text{maximize/minimize}_x &~ f(x) \
\text{subject to} &~ x \in \Omega
\end{aligned}
$$
where:
- $x$ is the decision variable
- $f$ is the objective function
- ...
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Post #6
Optimization Learning Notes 2
book Public Date: 2020-06-20 17:12:00.571290
update Update Date: 2020-07-30 15:34:13.181702
Recall that the standard of an LP is like the following:
$$
\begin{aligned}
\min &~~~ c^Tx
\
\text{subject to} &~~~ Ax = b
\
&~~~ x \ge 0
\end{aligned}
$$
where $x \in \mathbb R^n, b \in \mathbb R^m, A \in \mathbb R^{m\times n}$
In the following discussio...
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Post #7
A Bad Day with MinGW TLS
book Public Date: 2020-06-23 18:59:52.751680
update Update Date: 2020-06-23 19:03:41.398479
It is always a bad experience to debug all day and get no progress at all. Unfortunately, it is exactly want I was doing yesterday and I am really out of patience now. It all started with a CI failure. Yes, as you can see from the following issues and com...Read More Raw Content
Post #8
Optimization Learning Notes 3
book Public Date: 2020-06-24 11:49:25.724151
update Update Date: 2020-07-30 15:34:37.990602
Two-Phase Method with Simplex Tableau TL;DR, two-phase method involves two LP and can be solved by construct two simplex tableau. However, there two things to consider: - How to acquire the initial tableau in Phase I. - How to make the transition from Ph...Read More Raw Content
Post #9
Happy Postgresql
book Public Date: 2020-06-25 03:27:40.366366
update Update Date: 2020-06-25 03:53:54.352076
I would like to summarize some highlights of postgresql usage in my own blog system. Random Draw It suddenly occurs to me that I would like to add a lucky draw function to my CMS. However, due to the data structure implementation, how to random select a ro...Read More Raw Content