{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:BHBD6UCHPLMNET6ITR6266IIRD","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":"e9746e5c379901ad181b9e7b57246a2aade832138dd27dc396094c11871a7387","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2015-05-28T07:31:58Z","title_canon_sha256":"ead64582d1584117fcfc2d22589285a645961e270c5369ce3c49fd97d3fc6dbb"},"schema_version":"1.0","source":{"id":"1505.07569","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.07569","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"arxiv_version","alias_value":"1505.07569v4","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.07569","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"pith_short_12","alias_value":"BHBD6UCHPLMN","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BHBD6UCHPLMNET6I","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BHBD6UCH","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:e721f5a8a9a209fd08da4527a62a175ca29bf9329327964cdfd94575fbb0f835","target":"graph","created_at":"2026-05-18T01:25:00Z","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":"To overcome the performance degradation of adaptive filtering algorithms in the presence of impulsive noise, a novel normalized sign algorithm (NSA) based on a convex combination strategy, called NSA-NSA, is proposed in this paper. The proposed algorithm is capable of solving the conflicting requirement of fast convergence rate and low steady-state error for an individual NSA filter. To further improve the robustness to impulsive noises, a mixing parameter updating formula based on a sign cost function is derived. Moreover, a tracking weight transfer scheme of coefficients from a fast NSA filt","authors_text":"Badong Chen, Haiquan Zhao, Kan Li, Lu Lu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2015-05-28T07:31:58Z","title":"A novel normalized sign algorithm for system identification under impulsive noise interference"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.07569","kind":"arxiv","version":4},"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":"sha256:47485613e54cddaa371e12fdb997de364fab7bd4d3d034469a61478b20407cea","target":"record","created_at":"2026-05-18T01:25:00Z","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":"e9746e5c379901ad181b9e7b57246a2aade832138dd27dc396094c11871a7387","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2015-05-28T07:31:58Z","title_canon_sha256":"ead64582d1584117fcfc2d22589285a645961e270c5369ce3c49fd97d3fc6dbb"},"schema_version":"1.0","source":{"id":"1505.07569","kind":"arxiv","version":4}},"canonical_sha256":"09c23f50477ad8d24fc89c7daf790888e7e0cdd16dcc7531c5e82d75025cc43a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"09c23f50477ad8d24fc89c7daf790888e7e0cdd16dcc7531c5e82d75025cc43a","first_computed_at":"2026-05-18T01:25:00.121716Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:00.121716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hb+8fOoAlFGFdjXXn1QD4jAPSI1xrZa5P5MIC0V94yV0otD7V2fnwRW8t9Hm3rao6VPPGTYfnwxm37Bv6+imDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:00.122337Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.07569","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:47485613e54cddaa371e12fdb997de364fab7bd4d3d034469a61478b20407cea","sha256:e721f5a8a9a209fd08da4527a62a175ca29bf9329327964cdfd94575fbb0f835"],"state_sha256":"12ae6289783b671e89ac5226147396a241fe013f0f150189dbb348e33dcbaf0e"}