{"artifact_id":"L1-401","layer":"L1","title":"Windkessel Cardiac Afterload Model","domain":"Computational Biology","sub_domain":"Cardiovascular physiology","physics_fingerprint":{"L_DAG":2.2,"title":"Windkessel Cardiac Afterload Model","domain":"Computational Biology","carrier":"N/A","primitives":["D.time","O.least_squares.pressure_fit","S.gradient.ode_params"],"sub_domain":"Cardiovascular physiology","noise_model":"measurement_gaussian","problem_class":"parameter_estimation","solution_space":"windkessel_parameter_vector","difficulty_delta":3,"integration_axis":"cardiac_cycle","sensing_mechanism":"aortic_pressure_flow_measurement"},"observable_profile":{"metric":"pressure_waveform_RMSE_mmHg","regime":"Existence of the recovered windkessel_parameter_vector is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 20); nonlinearity_pressure_compliance dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Measurement gaussian sets the irreducible data-fidelity floor.","secondary":"parameter_identifiability_index"},"size_tiers":{"center_spec":{"omega":{"heart_rate_bpm":70,"N_cardiac_cycles":10,"systolic_pressure_mmHg":120,"diastolic_pressure_mmHg":80},"input_format":"measurement_only","problem_class":"parameter_estimation","forward_operator":"aortic_pressure_flow_measurement","epsilon_fn_center":"2.0 pressure_waveform_RMSE_mmHg"},"omega_bounds":{"heart_rate_bpm":[40,120],"N_cardiac_cycles":[3,100],"systolic_pressure_mmHg":[80,200],"diastolic_pressure_mmHg":[50,100]},"epsilon_bounds":{"pressure_waveform_RMSE_mmHg":[0.2,10.0]},"allowed_problem_classes":["parameter_estimation"],"allowed_omega_dimensions":["heart_rate_bpm","systolic_pressure_mmHg","diastolic_pressure_mmHg","N_cardiac_cycles"],"allowed_forward_operators":["aortic_pressure_flow_measurement"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":500,"metric":"pressure_waveform_RMSE_mmHg"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x9e264bd4cb29c0c0d2805ff69313eb2d909d79a18da8bfea36b01e6e83ce6b2c","chain_tx_hash":"0xbb2f99b0073c1b641d5f7611f14337dc55d81de4da2937f931619f6e60ed9109","chain_block":41555217}