(New) Standardized Generators

libEnsemble also supports all generators that use the gest_api interface.

 1from gest_api.vocs import VOCS
 2from optimas.generators import GridSamplingGenerator
 3
 4from libensemble.specs import GenSpecs
 5
 6vocs = VOCS(
 7    variables={
 8        "x0": [-3.0, 2.0],
 9        "x1": [1.0, 5.0],
10    },
11    objectives={"f": "MAXIMIZE"},
12)
13
14generator = GridSamplingGenerator(vocs=vocs, n_steps=[7, 15])
15
16gen_specs = GenSpecs(
17    generator=generator,
18    batch_size=4,
19    vocs=vocs,
20)
21...

Included with libEnsemble

Sampling

Optimization

  • APOSMM

    Asynchronously Parallel Optimization Solver for finding Multiple Minima (paper).

Modeling and Approximation

  • gpCAM

    Gaussian Process-based adaptive sampling using gpcam.

Verified Third Party Examples

Generators that use the gest_api interface and are verified to work with libEnsemble.

The standardized interface was developed in partnership with their authors.

Xopt - https://github.com/xopt-org/Xopt

Examples:

Expected Improvement

Nelder Mead

Optimas - https://github.com/optimas-org/optimas

Examples:

Grid Sampling

Ax Multi-fidelity