{"artifact_id":"L1-121","layer":"L1","title":"Magnetic Flux Leakage (MFL) — pipeline & rail inspection","domain":"Industrial Inspection","sub_domain":"Ferromagnetic defect detection via DC flux","physics_fingerprint":{"L_DAG":3.0,"title":"Magnetic Flux Leakage (MFL) — pipeline & rail inspection","domain":"Industrial Inspection","carrier":"radio_wave","primitives":["L.dc_magnetize","L.flux_leakage","D.hall_sensor","int.spatial"],"sub_domain":"Ferromagnetic defect detection via DC flux","noise_model":"gaussian","problem_class":"nonlinear_inverse","solution_space":"2D_defect_geometry","difficulty_delta":3,"integration_axis":"spatial","sensing_mechanism":"magnetic_flux_leakage"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 2D defect geometry is guaranteed within the declared Omega bounds. Uniqueness is local rather than global (non-convex landscape); convergence depends on initialisation and priors. Stability is moderately conditioned (kappa_eff ~= 10); liftoff_variation dominates the stability cliff; magnetization_non_uniformity and the remaining mismatch parameters contribute higher-order bias terms. Additive gaussian thermal/electronic noise sets the irreducible data-fidelity floor, while mild Tikhonov or analytic inversion is sufficient at the nominal Omega point.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":256,"W":4096,"SNR_dB":20,"N_sensors":32,"lift_off_mm":1.0,"velocity_mps":1.0,"liftoff_variation":0.0,"external_interference":0.0,"magnetization_non_uniformity":0.0},"input_format":"measurement_only","problem_class":"mfl","forward_operator":"mfl_forward","epsilon_fn_center":"24.0"},"omega_bounds":{"H":[64,1024],"W":[512,32768],"SNR_dB":[0.0,35.0],"N_sensors":[8,256],"lift_off_mm":[0.1,10.0],"velocity_mps":[0.1,20.0],"velocity_effect":[0.0,0.3],"liftoff_variation":[0.0,0.5],"external_interference":[0.0,0.3],"magnetization_non_uniformity":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[5.0,40.0]},"allowed_problem_classes":["mfl"],"allowed_omega_dimensions":["H","W","N_sensors","lift_off_mm","velocity_mps","SNR_dB","liftoff_variation","magnetization_non_uniformity","external_interference","liftoff_variation","magnetization_non_uniformity","external_interference","velocity_effect"],"allowed_forward_operators":["mfl_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":200,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x825452763bb821cbdb2021524f16bb0d0ae640804f619069ff7658a3da0bba70","chain_tx_hash":"0xe6800207eb22ce423a47944c47e17e8517582d6471756da23512a785c82074d6","chain_block":41554212}