{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:OXZW234DMCVHBGKGL7MBHYUGPM","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":"834c39d3b2d393fca265e826937a0811464052c1c2592c28d86b8cfc70e50978","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2014-10-02T17:42:36Z","title_canon_sha256":"deedf0959c71c8998d93b105a3e71bad533ee89c88636022a222ae10992a5132"},"schema_version":"1.0","source":{"id":"1410.0617","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.0617","created_at":"2026-05-18T02:41:10Z"},{"alias_kind":"arxiv_version","alias_value":"1410.0617v1","created_at":"2026-05-18T02:41:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.0617","created_at":"2026-05-18T02:41:10Z"},{"alias_kind":"pith_short_12","alias_value":"OXZW234DMCVH","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"OXZW234DMCVHBGKG","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"OXZW234D","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:6ef0905b47e9f7ebb5bff0c48fd656b9e171f9a2c6cb411305c039d2f7f73bda","target":"graph","created_at":"2026-05-18T02:41:10Z","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"},"paper":{"abstract_excerpt":"A novel method for distributed estimation of the frequency of power systems is introduced based on the cooperation between multiple measurement nodes. The proposed distributed widely linear complex Kalman filter (D-ACKF) and the distributed widely linear extended complex Kalman filter (D-AECKF) employ a widely linear state space and augmented complex statistics to deal with unbalanced system conditions and the generality complex signals, both second order circular (proper) and second order noncircular (improper). It is shown that the current, strictly linear, estimators are inadequate for unba","authors_text":"Dahir H. Dini, Danilo P. Mandic, Ron Hui, Sithan Kanna, Yili Xia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2014-10-02T17:42:36Z","title":"Distributed Widely Linear Frequency Estimation in Unbalanced Three Phase Power Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.0617","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:ee9306e084569aa2b5043569b8ed3a15fb2b6c2f446cd1a29514af952c28e676","target":"record","created_at":"2026-05-18T02:41:10Z","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":"834c39d3b2d393fca265e826937a0811464052c1c2592c28d86b8cfc70e50978","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2014-10-02T17:42:36Z","title_canon_sha256":"deedf0959c71c8998d93b105a3e71bad533ee89c88636022a222ae10992a5132"},"schema_version":"1.0","source":{"id":"1410.0617","kind":"arxiv","version":1}},"canonical_sha256":"75f36d6f8360aa7099465fd813e2867b2e6b3a8a5f5acf09cda9ddf3209d7a5c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75f36d6f8360aa7099465fd813e2867b2e6b3a8a5f5acf09cda9ddf3209d7a5c","first_computed_at":"2026-05-18T02:41:10.625223Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:41:10.625223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zhN5VmoVrgiV53gzA6GZAhdytaVqMtq8m33Nr1Okzd8KTG9t6pEVWWtyeffeWAH3VNsD442lNlNdmIXPSxpcBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:41:10.625862Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.0617","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ee9306e084569aa2b5043569b8ed3a15fb2b6c2f446cd1a29514af952c28e676","sha256:6ef0905b47e9f7ebb5bff0c48fd656b9e171f9a2c6cb411305c039d2f7f73bda"],"state_sha256":"cb42b6b96afca4617e857d4593baafdc07080385a910b61bd80103ae6f1f47d7"}