from typing import Dict


def resnet_params(model_name: str = "resnet34d") -> Dict[str, float]:
    """
    Map ResNet model name to parameter coefficients.
    """
    params_dict = {
        # Coefficients: res,dropout
        "resnet18d": {"resolution": 224, "dropout": 0.2},
        "resnet34d": {"resolution": 224, "dropout": 0.2},
        "resnet50d": {"resolution": 224, "dropout": 0.3},
        "resnet101d": {"resolution": 256, "dropout": 0.3},
        "resnet152d": {"resolution": 256, "dropout": 0.4},
    }
    return params_dict[model_name]