{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:HL63L2C4QRLTEATXJ7ZTUPF3IV","short_pith_number":"pith:HL63L2C4","canonical_record":{"source":{"id":"2104.03185","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-04-07T15:24:16Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"68fb23cadabc44e8bd23fc67dc66239ae139bd62df29a0dbd12e622478f68d05","abstract_canon_sha256":"ea8f2ac92357547429e8889a08be155d7730f813ded77905be45f960c8429238"},"schema_version":"1.0"},"canonical_sha256":"3afdb5e85c84573202774ff33a3cbb455a4876e79e88a5bf886e19b1a7d866e1","source":{"kind":"arxiv","id":"2104.03185","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.03185","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"arxiv_version","alias_value":"2104.03185v1","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.03185","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"pith_short_12","alias_value":"HL63L2C4QRLT","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"pith_short_16","alias_value":"HL63L2C4QRLTEATX","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"pith_short_8","alias_value":"HL63L2C4","created_at":"2026-07-05T02:30:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:HL63L2C4QRLTEATXJ7ZTUPF3IV","target":"record","payload":{"canonical_record":{"source":{"id":"2104.03185","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-04-07T15:24:16Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"68fb23cadabc44e8bd23fc67dc66239ae139bd62df29a0dbd12e622478f68d05","abstract_canon_sha256":"ea8f2ac92357547429e8889a08be155d7730f813ded77905be45f960c8429238"},"schema_version":"1.0"},"canonical_sha256":"3afdb5e85c84573202774ff33a3cbb455a4876e79e88a5bf886e19b1a7d866e1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:30:03.771856Z","signature_b64":"TBCcA35MWU6onn3EV+mo9k88xbj6gGcu2Li+qcGEiXoJqa21onoMACC8q8UZUL3gjjjyD9w9I/aokTYU8B56AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3afdb5e85c84573202774ff33a3cbb455a4876e79e88a5bf886e19b1a7d866e1","last_reissued_at":"2026-07-05T02:30:03.771320Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:30:03.771320Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.03185","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:30:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nthIWrp7Filh72B1a5isUqYZhLOf0Xnj3zrkkDxU3rCH507tdihAeIYIAaOV5nOvswyb/Fl2HaaI8A8NHsZ7AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T06:31:00.397099Z"},"content_sha256":"4ccd8394e93eed697925c85173c53e2152703a28cdcf876b7668c6ec97727a3f","schema_version":"1.0","event_id":"sha256:4ccd8394e93eed697925c85173c53e2152703a28cdcf876b7668c6ec97727a3f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:HL63L2C4QRLTEATXJ7ZTUPF3IV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Blade Effective Wind Speed Estimation: A Subspace Predictive Repetitive Estimator Approach","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Atindriyo Kusumo Pamososuryo, Jan-Willem van Wingerden, Riccardo Ferrari, Tobias Gybel Hovgaard, Yichao Liu","submitted_at":"2021-04-07T15:24:16Z","abstract_excerpt":"Modern wind turbine control algorithms typically utilize rotor effective wind speed measured from an anemometer on the turbine's nacelle. Unfortunately, the measured wind speed from such a single measurement point does not give a good representation of the effective wind speed over the blades, as it does not take the varying wind condition within the entire rotor area into account. As such, Blade Effective Wind Speed (BEWS) estimation can be seen as a more accurate alternative. This paper introduces a novel Subspace Predictive Repetitive Estimator (SPRE) approach to estimate the BEWS using bla"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.03185","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.03185/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:30:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p0ZFajMoCDvqqilkKxw2M+irbSp0cuvg8WDdD2OrWjPmlqkLCcrnyhLHRf7CwvvMSKiVwZ4pWgBwvZZppVS4Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T06:31:00.398964Z"},"content_sha256":"14f0914cf9dfd3807315e3a56ad9f04d4fcf49f267a3667090fd93d79b07df26","schema_version":"1.0","event_id":"sha256:14f0914cf9dfd3807315e3a56ad9f04d4fcf49f267a3667090fd93d79b07df26"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HL63L2C4QRLTEATXJ7ZTUPF3IV/bundle.json","state_url":"https://pith.science/pith/HL63L2C4QRLTEATXJ7ZTUPF3IV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HL63L2C4QRLTEATXJ7ZTUPF3IV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-01T06:31:00Z","links":{"resolver":"https://pith.science/pith/HL63L2C4QRLTEATXJ7ZTUPF3IV","bundle":"https://pith.science/pith/HL63L2C4QRLTEATXJ7ZTUPF3IV/bundle.json","state":"https://pith.science/pith/HL63L2C4QRLTEATXJ7ZTUPF3IV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HL63L2C4QRLTEATXJ7ZTUPF3IV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:HL63L2C4QRLTEATXJ7ZTUPF3IV","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"ea8f2ac92357547429e8889a08be155d7730f813ded77905be45f960c8429238","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-04-07T15:24:16Z","title_canon_sha256":"68fb23cadabc44e8bd23fc67dc66239ae139bd62df29a0dbd12e622478f68d05"},"schema_version":"1.0","source":{"id":"2104.03185","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.03185","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"arxiv_version","alias_value":"2104.03185v1","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.03185","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"pith_short_12","alias_value":"HL63L2C4QRLT","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"pith_short_16","alias_value":"HL63L2C4QRLTEATX","created_at":"2026-07-05T02:30:03Z"},{"alias_kind":"pith_short_8","alias_value":"HL63L2C4","created_at":"2026-07-05T02:30:03Z"}],"graph_snapshots":[{"event_id":"sha256:14f0914cf9dfd3807315e3a56ad9f04d4fcf49f267a3667090fd93d79b07df26","target":"graph","created_at":"2026-07-05T02:30:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2104.03185/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Modern wind turbine control algorithms typically utilize rotor effective wind speed measured from an anemometer on the turbine's nacelle. Unfortunately, the measured wind speed from such a single measurement point does not give a good representation of the effective wind speed over the blades, as it does not take the varying wind condition within the entire rotor area into account. As such, Blade Effective Wind Speed (BEWS) estimation can be seen as a more accurate alternative. This paper introduces a novel Subspace Predictive Repetitive Estimator (SPRE) approach to estimate the BEWS using bla","authors_text":"Atindriyo Kusumo Pamososuryo, Jan-Willem van Wingerden, Riccardo Ferrari, Tobias Gybel Hovgaard, Yichao Liu","cross_cats":["cs.SY"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-04-07T15:24:16Z","title":"Blade Effective Wind Speed Estimation: A Subspace Predictive Repetitive Estimator Approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.03185","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:4ccd8394e93eed697925c85173c53e2152703a28cdcf876b7668c6ec97727a3f","target":"record","created_at":"2026-07-05T02:30:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"ea8f2ac92357547429e8889a08be155d7730f813ded77905be45f960c8429238","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-04-07T15:24:16Z","title_canon_sha256":"68fb23cadabc44e8bd23fc67dc66239ae139bd62df29a0dbd12e622478f68d05"},"schema_version":"1.0","source":{"id":"2104.03185","kind":"arxiv","version":1}},"canonical_sha256":"3afdb5e85c84573202774ff33a3cbb455a4876e79e88a5bf886e19b1a7d866e1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3afdb5e85c84573202774ff33a3cbb455a4876e79e88a5bf886e19b1a7d866e1","first_computed_at":"2026-07-05T02:30:03.771320Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:30:03.771320Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TBCcA35MWU6onn3EV+mo9k88xbj6gGcu2Li+qcGEiXoJqa21onoMACC8q8UZUL3gjjjyD9w9I/aokTYU8B56AQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:30:03.771856Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.03185","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ccd8394e93eed697925c85173c53e2152703a28cdcf876b7668c6ec97727a3f","sha256:14f0914cf9dfd3807315e3a56ad9f04d4fcf49f267a3667090fd93d79b07df26"],"state_sha256":"c060142dfcef426db41c25bc0970bfa795fba65a5cb4c74ccec0760e3d985b01"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MbBUXhufgxMTHRv83sWMbE7B/BxDi8Wr0ULt8DLZQBFLxFk2sGouHFkWq6WVPsAxmmfx4HjQlykwNTRdi2t2Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T06:31:00.405300Z","bundle_sha256":"9c67def15690bcbc2707a2702003667fea8e429ef306e4bdc2fcbddfc2132c22"}}