{"artifact_id":"L1-257","layer":"L1","title":"Acoustic Wave Equation — time-domain pressure field reconstruction","domain":"Acoustics","sub_domain":"3D linear acoustic wave propagation","physics_fingerprint":{"L_DAG":3.5,"title":"Acoustic Wave Equation — time-domain pressure field reconstruction","domain":"Acoustics","carrier":"acoustic","primitives":["L.initial_condition","L.wave_propagate","S.record.receivers","int.temporal"],"sub_domain":"3D linear acoustic wave propagation","noise_model":"gaussian","problem_class":"linear_inverse","solution_space":"3D_pressure_field_spacetime","difficulty_delta":5,"integration_axis":"temporal","sensing_mechanism":"pressure_receivers"},"observable_profile":{"metric":"PSNR_dB","regime":"Conditional stability; mismatch parameters dominate at Omega bounds.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":128,"W":128,"Z":64,"SNR_dB":30,"fs_kHz":100,"c_error":0.0,"N_samples":512,"rho_error":0.0,"N_receivers":64,"receiver_pos_error":0.0,"boundary_reflectivity":0.0},"input_format":"measurement_only","problem_class":"acoustic_wave","forward_operator":"acoustic_wave_forward","epsilon_fn_center":"26.0"},"omega_bounds":{"H":[64,512],"W":[64,512],"Z":[32,256],"SNR_dB":[0,40],"fs_kHz":[10,1000],"c_error":[0.0,0.1],"N_samples":[128,4096],"rho_error":[0.0,0.1],"N_receivers":[16,512],"receiver_pos_error":[0.0,0.02],"boundary_reflectivity":[0.0,0.5]},"epsilon_bounds":{"psnr_db":[10.0,45.0]},"allowed_problem_classes":["acoustic_wave"],"allowed_omega_dimensions":["H","W","Z","N_receivers","N_samples","fs_kHz","SNR_dB","c_error","rho_error","receiver_pos_error","boundary_reflectivity","c_error","rho_error","receiver_pos_error","boundary_reflectivity"],"allowed_forward_operators":["acoustic_wave_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":800,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x61eda6d05bf44aae410231c7f4aab76fade90cf4c14f16b7fca3f1f32a80ce19","chain_tx_hash":"0xef08073047b4e18f6d23fd7bd5e7b1edd900d26277384f73f0daab71ac1ef75b","chain_block":41554035}