ryan-nextmv

5 ms·

1. 1.▲
   Driving an electric car to see the 2024 solar eclipse in New England(chargely.app)

   1 points by ryan-nextmv 3y ago|0 comments
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   by ryan-nextmv 3y ago

   The conference is virtual. It runs Monday, September 18 through Wednesday, September 20. Registration is free.
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   Show HN: Shadow Testing for Decision/or Algorithms(nextmv.io)

   7 points by ryan-nextmv 3y ago|0 comments
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   by ryan-nextmv 4y ago

   Even if this paper is correct, the approach is not practical. From table 1 in section 6.2, the LP representation of a 25-city TSP requires 24,580,032 variables and 3,643,825 constraints. Merely formulating that model will require significan
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   Ask HN: Do you use Go plugins?

   6 points by ryan-nextmv 4y ago|1 comments
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   Show HN: Create decision optimization models in minutes(docs.nextmv.io)

   4 points by ryan-nextmv 4y ago|0 comments
7. 7.▲
   by ryan-nextmv 4y ago

   I haven't looked at JuMP in a while - the last time I tried it was when I was still doing personal blogging ( https://ryanjoneil.github.io/posts/2014-07-18-are-we-getting... ). I remember liking JuMP, but Julia itse
8. 8.▲
   by ryan-nextmv 4y ago

   Yes! MiniZinc is great. It's the only sticker I have on my Linux box. I like how it targets both MIP and CP solvers. It's actually the tool that first led me to CP and Gecode.
9. 9.▲
   by ryan-nextmv 4y ago

   Is it safe to say those optimizations are performed ad hoc? That is, you're manually in control of the optimization process instead of wiring it up to some kind of automation?
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    by ryan-nextmv 4y ago

    <3 SCIP. About a dozen years ago I used to write the python-zibopt library (now defunct and rendered moot by the far superior PySCIPOpt). Hadn't heard of JoD - that looks really interesting. What are your experiences so far?
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    by ryan-nextmv 4y ago

    "My problem is mind-numbingly complex, like everyone else doing supply-chain optimization" brings me joy. I'll definitely reach out - would love to get your reaction to some of our new ideas.
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    by ryan-nextmv 4y ago

    Thanks for looking at our docs in light of your problem domain. That's way beyond what I anticipated, and much appreciated! We haven't put a lot more examples into our SDK docs lately since we've been working more on our rout
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    Ask HN: Do you use an optimization solver? Which one? Do you like it?

    283 points by ryan-nextmv 4y ago|153 comments
14. 14.▲
    by ryan-nextmv 6y ago

    Definitely try out the API ( https://cloud.nextmv.io/ ) to get a sense for it. Note that these are canned models, and the systems under the hood are very customizable. You can find some more information in our docs ( https:&#
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    Nextmv Cloud (YC W20) – Hosted Routing API

    18 points by ryan-nextmv 6y ago|2 comments
16. 16.▲
    by ryan-nextmv 7y ago

    We haven't published any formal benchmarks yet. We will soon! I'm not a regular OR-Tools user, but it allows you to call its own CP solver or external MIP solvers. I can provide a few general comments about what you'll find a
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    by ryan-nextmv 7y ago

    Thanks for asking! Value is actually the value of a state itself, and it can increase or decrease from one state to its successors. If the value must increase or decrease monotonically, then that (very useful) information can be given to Ho
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    by ryan-nextmv 7y ago

    Awesome! We're very much looking for feedback on how we can improve it.
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    by ryan-nextmv 7y ago

    Thanks for the question! In sound-byte form, this is for developers to develop algorithms. What we really mean by that is for developers to easily automate decision making at any scale. Those can be simple rules-based decisions, or complex
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    by ryan-nextmv 7y ago

    I haven't used Choco myself, but I have seen it used quite successfully in some nice hybrid optimization studies. Gecode is awesome, but can be complex to get started with. Parts of Hop's design are informed by using Gecode and SC
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    by ryan-nextmv 7y ago

    1-tree on GPUs? That's pretty interesting. Ping us at tech@nextmv.io if you're seriously interested in talking more.
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    by ryan-nextmv 7y ago

    Sounds familiar! One thing that's struck us is the lack of accessibility of optimization tools to software engineers. I worked as a developer long before I ever got into OR. When I switched over to being an analyst, it felt like there
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    by ryan-nextmv 7y ago

    OptaPlanner and Choco are both very cool tech. We've been pretty religious users of Gecode ( https://www.gecode.org/ ) over the last few years, which you should also check out if you are interested in CP and like C++. Th
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    by ryan-nextmv 7y ago

    I guess we're a TSaaS company. :)
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    by ryan-nextmv 7y ago

    Thank you so much for sharing this! I will read it. I suspect there's a lot of potential for these sorts of techniques in production systems, especially combined with decision diagrams. We've been looking at DDs partly because the
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    by ryan-nextmv 7y ago

    Thanks for the love! We're learning a lot from the market already and plan to have plenty of interesting new features released in the coming weeks.
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    by ryan-nextmv 7y ago

    Good points! We've definitely seen delivery networks flail under certain conditions, like lack of density. Our hope is that by making both optimization and simulation more accessible to software engineers, we can help organizations und