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    "history_steps": 28,
    "step_hours": 6,
    "forecast_steps": 40,
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    "num_layers": 3,
    "dropout": 0.1
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    "activations": ["relu", "relu", "tanh"],
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    "learning_rate": 0.001,
    "loss": "MSE"
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  "runtime": {"device": "auto", "num_threads": 2},
  "paths": {
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    "training_metrics": "result/training/metrics.json",
    "predictions": "result/output/predictions.npz",
    "evaluation_metrics": "result/evaluation/metrics.json",
    "comparison": "result/evaluation/comparison.png"
  }
}