{
  "scope": "Infinite homogeneous isotropic conductor, point radial dipoles, synthetic observer layouts. Not a physical layered head or individual clinical model.",
  "geometry": {
    "conductivity_S_per_m": 0.33,
    "source_radius_m": 0.06,
    "observer_radius_m": 0.09,
    "sources": 96,
    "observers": 32,
    "expanded_observers": 64,
    "rank_32": 31,
    "rank_64": 63,
    "null_dimension_32": 65,
    "null_dimension_64": 33
  },
  "null_example": {
    "sensor_relative_difference": 4.671291487935113e-16,
    "extra_sensor_relative_difference": 0.2227550830795622,
    "source_difference_norm_nAm": 9.999999999999998
  },
  "inverse": {
    "noise_draws": 1000,
    "noise_scale_before_reference_fraction": 0.05,
    "basis_modes": 8,
    "pinv_relative_cutoff": 1e-12,
    "metrics": [
      {
        "estimator": "96源最小范数",
        "truth": "模式内真值",
        "median_source_relative_error": 0.28803647826098366,
        "median_sensor_relative_residual": 1.282021660635894e-15,
        "q10": 0.2752725534984021,
        "q90": 0.30588299633384614
      },
      {
        "estimator": "96源最小范数",
        "truth": "加入不可见分量",
        "median_source_relative_error": 0.7443555490640847,
        "median_sensor_relative_residual": 1.282021660635894e-15,
        "q10": 0.7420032487565503,
        "q90": 0.7478097684594205
      },
      {
        "estimator": "限制为8个平滑模式",
        "truth": "模式内真值",
        "median_source_relative_error": 0.026833431286567323,
        "median_sensor_relative_residual": 0.04203028157450392,
        "q10": 0.018439174977746484,
        "q90": 0.03701179786381709
      },
      {
        "estimator": "限制为8个平滑模式",
        "truth": "加入不可见分量",
        "median_source_relative_error": 0.6975701767918927,
        "median_sensor_relative_residual": 0.04203028157450392,
        "q10": 0.696802066098934,
        "q90": 0.6985084041140337
      }
    ]
  },
  "hardware": {
    "input_resistance_ohm": 1000000000.0,
    "contact_resistances_ohm": [
      10000.0,
      1000000.0
    ],
    "common_voltage_uV": 1000.0,
    "gains": [
      0.999990000099999,
      0.999000999000999
    ],
    "converted_common_mode_uV": 0.9890010990000198,
    "scope": "Purely resistive toy, not electrode impedance spectroscopy or a device specification; no amplifier intrinsic CMRR/noise model."
  },
  "ear_table_scope": "2026 source Table1 within-device eyes-closed minus eyes-open mean dB PSD contrast and source-reported 95% CI; different readouts and sample subsets, no direct statistical device comparison. ERP Table2 disagrees with prose and is not used here."
}