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{
"record": "easycom_track_gru_residual_4ep_2026-09-07",
"dataset": "easycom",
"global_features": "open_stream_2fps_8s_last4_stack",
"local_features": "local_qwen_1s_encoded_tf4576",
"train_sessions": [4, 5, 6, 7, 8, 9, 10, 11],
"dev_sessions": [12],
"test_sessions": [1, 2, 3],
"epochs": 4,
"loss": "lstr-mce",
"layer_fusion": "concat-mlp",
"person_history_frames": 16,
"person_history_fps": 2.0,
"person_track_max_gap_seconds": 1.0,
"protocol": "causal_valid_only",
"units": "percentage_points",
"dev": {
"seeds": [0, 1, 2],
"paired_delta_track_minus_pooled": {
"map_0p2": {"mean": 0.00918, "sample_std": 0.01429},
"bg_ap_0p2": {"mean": -0.03206, "sample_std": 0.06281},
"wearer_ap_0p2": {"mean": 0.07930, "sample_std": 0.13610},
"others_ap_0p2": {"mean": -0.01969, "sample_std": 0.03062},
"mean_map": {"mean": 0.01306, "sample_std": 0.02368}
}
},
"test_audit": {
"seeds": [0],
"pooled": {
"map_0p2": 81.74161,
"bg_ap_0p2": 68.57326,
"wearer_ap_0p2": 84.71790,
"others_ap_0p2": 91.93366,
"mean_map": 64.88810,
"full_timeline_mean_map": 64.87493
},
"track_gru": {
"map_0p2": 81.74160,
"bg_ap_0p2": 68.57367,
"wearer_ap_0p2": 84.71783,
"others_ap_0p2": 91.93330,
"mean_map": 64.88780,
"full_timeline_mean_map": 64.87463
},
"paired_delta_track_minus_pooled": {
"map_0p2": -0.00001,
"bg_ap_0p2": 0.00041,
"wearer_ap_0p2": -0.00007,
"others_ap_0p2": -0.00037,
"mean_map": -0.00030
},
"warning": "Observed before diagnosing residual optimization; do not use to tune the corrected architecture."
},
"selected_track_checkpoints": [
{"seed": 0, "best_epoch": 1, "saved_tanh_gate": -0.0015261819353327155, "selection_dev_mean_map": 0.5945069810061214},
{"seed": 1, "best_epoch": 1, "saved_tanh_gate": 0.004098099190741777, "selection_dev_mean_map": 0.5952841235072595},
{"seed": 2, "best_epoch": 2, "saved_tanh_gate": 0.010815753601491451, "selection_dev_mean_map": 0.5959213772894789}
],
"decision": "No meaningful gain. Treat as a zero-gate optimization failure, not evidence against track continuity.",
"next_step": "Remove scalar gate, zero-initialize the final residual layer, verify nonzero branch gradients, and screen only on Session 12."
}