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  "hidden": 2048,
  "n_features": 16384,
  "k": 32,
  "expansion": 8,
  "variance_explained_train": 0.9297,
  "variance_explained_test": 0.8988,
  "L0": 32,
  "dead_features": 0,
  "dead_frac": 0.0,
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  "features_per_position": [
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    3316,
    4336,
    4652,
    4624,
    4387
  ],
  "mean_position_concentration": 0.498,
  "frac_features_single_position": 0.237,
  "N_test": 1319
}