Leon Lan @leonlan_

PhD Candidate in Operations Research @ VU Amsterdam leonlan.com Amsterdam Joined October 2015

Tweets

33
Followers

46
Following

257
Likes

535

Leon Lan @leonlan_

2 years ago

@HappeTamara @XaidaProject Huuuuuuuge crowd!!

0 0 0 34 0

View Details

Leon Lan @leonlan_

3 years ago

@AustinLBuchanan @ROberdieck @HighsOpt @pypi Fyi, PuLP and Pyomo both also have support HiGHS. coin-or.github.io/pulp/technical… pyomo.readthedocs.io/en/stable/libr…

0 0 1 133 0

View Details

Leon Lan @leonlan_

3 years ago

@AIVOInfo @Ai4Opt Is there a way to sign up to receive the newsletter via email?

1 0 0 30 0

View Details

We provide many examples in which we use ALNS to solve well-known optimization problems, including the traveling salesman problem and the capacitated vehicle routing problem. Interested in more? Check out the documentation here! alns.readthedocs.io

0 0 0 136 0

View Details

Leon Lan @leonlan_

3 years ago

The ALNS package provides a general, well-documented and tested implementation of the ALNS algorithm. We have also implemented a wide variety of acceptance criteria, operator selection schemes and stopping criteria. github.com/N-Wouda/ALNS

1 0 1 184 0

View Details

Leon Lan @leonlan_

3 years ago

Our paper got published in the Journal of Open Source Software! Niels Wouda and I made a Python package for the adaptive large neighborhood search (ALNS) metaheuristic, which is a very effective algorithm for solving vehicle routing and scheduling problems.

JOSS @JOSS_TheOJ

4 years ago

Just published in JOSS: 'ALNS: a Python implementation of the adaptive large neighbourhood search metaheuristic' doi.org/10.21105/joss.…

0 0 2 1K 0

1 0 5 600 0

View Details

Leon Lan @leonlan_

4 years ago

Our code is open-sourced and available at github.com/N-Wouda/Euro-N…. Feel free to send me a message if you have any questions!

0 0 1 0 0

View Details

Leon Lan @leonlan_

4 years ago

For the dynamic problem, we simulate future scenarios to determine which requests are good candidates for dispatch and postponement. More information can be found on our slides: nielswouda.com/slides/euro_ne….

1 0 0 0 0

View Details

Leon Lan @leonlan_

4 years ago

Our team OptiML won the second place prize! 🎉

Thibaut Vidal @vidalthi

4 years ago

And the winners of the #NeurIPS2022 #VRP competition are... 1) Kleopatra: K Jungel, L Baty, P Klein @TU_Muenchen @EcoledesPonts 2) OptiML: J van Doorn, L Lan, L Pentinga, N Wouda @VUamsterdam @univgroningen 3) Team_sb: Y Kwon, J Choo, D Bae, J Kim, A Hottung Samsung @unibielefeld

2 3 28 0 2

1 1 8 0 0

View Details

EURO-NeurIPS-VRP-2022 @EuroNeuripsVRP

4 years ago

Aaaand it's done! The qualification phase has ended! More than 800 submission were done resulting in almost 50 teams on the leaderboard! Congratulations to the top 10 teams qualifying for the FINALS with their impressive results! :)

1 5 15 0 0

View Details

Xaida Project @XaidaProject

4 years ago

🆕Briefs | @HappeTamara @RobertVautard and the #summerschool attendees worked on the early (mid-June) 2022 #heatwaves in #Europe and the links with #climatechange What do we know? Read our fact sheet👉xaida.eu/early-2022-hea…

0 3 24 0 1

View Details

Leon Lan @leonlan_

4 years ago

@AStrasser116 @ysrinivas @kk_levine @SpringerSBM Hi, change the id in the following link link.springer.com/search.rss?sea…. This works for journals in mathematical optimization.