OR Exchange

FYI: The #ORMS Q&A site @ Stack Exchange, or.stackexchange.com, now has its own Twitter handle. If you don't want to miss any new questions posted on OR​.​SE, you might want to follow @StackOpsRes.

🤔 I love the "Network Flows" book by Ahuja, Magnanti, and Orlin, but I have to admit that 1993 is looking a little dated. Are there more up-to-date references on network optimization #orms folks would recommend, or is this one still the best?

#MIP2023 Computational Competition Announced: It's "MIP Reoptimization"! Assemble all your primal, dual, tuning, and learning ideas to solve those ever-(slightly)-changing MIPs faster and faster over time... all the rules, data, and award info at github.com/ambros-gleixne… #orms

I recorded a fun video for my coworkers at @getnextmv the other day experimenting with Github Copilot🤖 to solve a knapsack problem using integer programming. It was pretty mind blowing🤯. Anyone else using Copilot for operations research work? youtu.be/bqdJhJ12PT4 #orms

After more than 20 years, I have shut down my repository of Traveling Tournament instances and solution values (mat.tepper.cmu.edu/TOURN). The group at RobinX sportscheduling.ugent.be/RobinX/index.p… has taken it over, and does it a much more appealing way (read: not 1999 hand-coded HTML). #orms

Ping twitter world, there's an interesting new position as optimization engineer in my team - if you are passionate about developing optimization software with huge impact on public transportation - this is the time to act ! rb.gy/tgdmxg #optimization #orjobs #orms

MOSEK 10 and other news in our last newsletter mailchi.mp/mosek/mosek-ne…

. @FICO_Xpress 9.0 will come with a global MINLP solver! Learn about all details of this beta, and our new multi-objective optimization capabilities, and our MIP performance improvements, and so much more at #INFORMS2022, session MB42 #orms #optimization

Learning and teaching #optimization is hard. Burritos can help. Thank you to @INFORMS for featuring the #burritooptimizationgame in the August issue of #ORMStoday, along with highlights on how instructors can use the game in the classroom. Full article: pubsonline.informs.org/do/10.1287/orm…

Check this great library for simulating and solving dynamic vehicle routing algorithms (DVRPs), along with new potential-based scheduling policies: arxiv.org/abs/2202.12983 github.com/amflorio/dvrp-… youtu.be/D57xNfU73as #orms by J. Zhang, K. Luo, A.M. Florio, and T. Van Woensel

A diversified set of 10,000 CVRP instances, Python generator, and ... all optimal solutions! Consider testing your ML method on them. Measure absolute errors, not errors relative to some arguable reference method vrp.atd-lab.inf.puc-rio.br/index.php/en/u…

March 2022 Issue dlvr.it/SKrhlq

The #OperationsResearch Stack Exchange site (or.stackexchange.com) has "graduated" out of beta status and is now a full @StackExchange site! The site launched about 3 years ago and now has >5000 users, >2000 questions, and ~1000 visits/day. Come check it out!

Please read this important blog post about the future of COIN-OR! coin-or.org/2021/12/15/fut…

December 2021 Issue dlvr.it/SDZtkV

Team Just Passing Through. @WaterlooMath @HCM_Bonn @roskildeuni

Subject to: Marco Lübbecke (Aachen University, Germany), youtu.be/JzWAAvryTKA, #orms #analytics #optimization #columngeneration @mluebbecke

Subject to: Laura Albert (University of Wisconsin-Madison), author of the blog Punk Rock Operations Research, youtu.be/pynQYwsqZg4 #orms #analytics #optimization #WomenInSTEM #PunkRockOR #timemanagement @lauraalbertphd

Subject to: Michel Gendreau (Polytechnique Montréal, Canada), youtu.be/XnJTj3c5kCY #orms #analytics #optimization

Subject to: David Pisinger (DTU, Denmark), youtu.be/vz9VZViVYtg #orms #analytics #optimization #knapsack @DPisinger