Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback

    • Mariana

    Metadata Updated: April 10, 2025

    The Mariana source code has been open sourced. Download the tar file Mariana.tgz below. I would love feedback.

    Mariana is an auto-classifier algorithm that efficiently optimizes hyperparameters for Support Vector Machines.

    Mariana is an algorithm that efficiently optimizes the hyperparameters for Support Vector Machines for regression and classification. It currently uses Simulated Annealing for optimization but can be extended to use a variety of stochastic optimization techniques including, Markov Chain Monte Carlo, Sequential Monte Carlo, and Genetic Algorithms. Mariana can be applied to the text portion of reports, determining the likely categories that each report falls into, and calculating a confidence for each classification. Mariana¹s innovation is it automates the search for the optimum hyperparameters. It does so by randomly selecting a set of hyperparameters. Next it builds a model from the training data and tests the model's performance using the validation set. That performance is compared to previous performances, and if the current set of hyperparameters are better than the previous one, then it records the hyperparameters. This process is repeated until there are no noticeable improvements in performance or at a predefined stopping point.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date April 10, 2025
    Data Update Frequency irregular

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date April 10, 2025
    Publisher Dashlink
    Maintainer
    Identifier DASHLINK_117
    Data First Published 2010-09-10
    Data Last Modified 2025-03-31
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id ff19784c-7e3a-419f-9307-39243b4d76fd
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://c3.nasa.gov/dashlink/resources/117/
    Program Code 026:029
    Source Datajson Identifier True
    Source Hash bcbdf34162592167daa5ad48ec5861a6bd00fb4ac34c51205e5e008d6bc00087
    Source Schema Version 1.1

    Didn't find what you're looking for? Suggest a dataset here.