{"artifact_id":"L1-122","layer":"L1","title":"Guided-Wave Ultrasonic Testing (long-range pipe/rail inspection)","domain":"Industrial Inspection","sub_domain":"Dispersive Lamb/torsional wave NDT","physics_fingerprint":{"L_DAG":3.6,"title":"Guided-Wave Ultrasonic Testing (long-range pipe/rail inspection)","domain":"Industrial Inspection","carrier":"acoustic","primitives":["L.emit.guided_wave","L.dispersive_propagation","D.reflection_transmission","int.temporal"],"sub_domain":"Dispersive Lamb/torsional wave NDT","noise_model":"gaussian","problem_class":"nonlinear_inverse","solution_space":"1D_axial_defect_profile","difficulty_delta":5,"integration_axis":"temporal","sensing_mechanism":"guided_wave_ultrasonics"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 1D axial defect profile 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 ~= 14); mode_mixing dominates the stability cliff; temperature_drift 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":{"f_kHz":40,"N_time":4096,"SNR_dB":25,"N_modes":2,"range_m":30,"mode_mixing":0.0,"temperature_drift":0.0,"coating_attenuation":0.0},"input_format":"measurement_only","problem_class":"guided_wave","forward_operator":"guided_wave_forward","epsilon_fn_center":"22.0"},"omega_bounds":{"f_kHz":[10,500],"N_time":[512,16384],"SNR_dB":[0.0,35.0],"N_modes":[1,5],"range_m":[1,200],"mode_mixing":[0.0,0.5],"temperature_drift":[0.0,30.0],"coating_attenuation":[0.0,0.5],"support_reflections":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[5.0,40.0]},"allowed_problem_classes":["guided_wave"],"allowed_omega_dimensions":["N_time","f_kHz","range_m","N_modes","SNR_dB","mode_mixing","temperature_drift","coating_attenuation","mode_mixing","temperature_drift","coating_attenuation","support_reflections"],"allowed_forward_operators":["guided_wave_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":280,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x6052505f548f08fdda651f8014f2e92283c52fee67ed4eb9126234fec91d0346","chain_tx_hash":"0x490c7bef923c05878d8b8df6cdef48aebf4c1574e3f715f189adf2dfc6623072","chain_block":41554212}