{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:IB2A4PJJQXDICOCTZFBQQ5MMWG","short_pith_number":"pith:IB2A4PJJ","canonical_record":{"source":{"id":"2408.04210","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2024-08-08T04:31:00Z","cross_cats_sorted":[],"title_canon_sha256":"380bcf114d1606779884a5649cc7ad9bb8a15cde9b2a107fc17c75a6bdb1fe7b","abstract_canon_sha256":"a88e753c5c7a0e6f253db4e710a682c4145883a120b8f0a5efd0b5a8cffd9b75"},"schema_version":"1.0"},"canonical_sha256":"40740e3d2985c6813853c94308758cb19f56286af83030812dca23eabd606bd8","source":{"kind":"arxiv","id":"2408.04210","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.04210","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"arxiv_version","alias_value":"2408.04210v4","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.04210","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"pith_short_12","alias_value":"IB2A4PJJQXDI","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"pith_short_16","alias_value":"IB2A4PJJQXDICOCT","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"pith_short_8","alias_value":"IB2A4PJJ","created_at":"2026-06-03T01:05:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:IB2A4PJJQXDICOCTZFBQQ5MMWG","target":"record","payload":{"canonical_record":{"source":{"id":"2408.04210","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2024-08-08T04:31:00Z","cross_cats_sorted":[],"title_canon_sha256":"380bcf114d1606779884a5649cc7ad9bb8a15cde9b2a107fc17c75a6bdb1fe7b","abstract_canon_sha256":"a88e753c5c7a0e6f253db4e710a682c4145883a120b8f0a5efd0b5a8cffd9b75"},"schema_version":"1.0"},"canonical_sha256":"40740e3d2985c6813853c94308758cb19f56286af83030812dca23eabd606bd8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-03T01:05:03.618057Z","signature_b64":"iWSViUtHTnLs/ryMT5/2tahuQ9/w/UAkhez48Y6dP7EcgZhgLfzgIagXh6AgzxEaLZugFmETLGLVPd6ua7r2AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"40740e3d2985c6813853c94308758cb19f56286af83030812dca23eabd606bd8","last_reissued_at":"2026-06-03T01:05:03.617644Z","signature_status":"signed_v1","first_computed_at":"2026-06-03T01:05:03.617644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.04210","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-03T01:05:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wbYEsi7lFtpIzGs2rDVBeBffu0Grvig5lyk13mkMajw8VEl85l3+RRAxii8d4Pa7n6AqLHNDHlxXuyZ+jmm4BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T00:23:49.246873Z"},"content_sha256":"e9955510d4c150501777d2bbc7ad69fab2796330e67a5dd40b5607b2bfa9756c","schema_version":"1.0","event_id":"sha256:e9955510d4c150501777d2bbc7ad69fab2796330e67a5dd40b5607b2bfa9756c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:IB2A4PJJQXDICOCTZFBQQ5MMWG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Least-Squares Adaptive Filter-Based Cohen's Class Time-Frequency Distribution for Signal Denoising","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Manjun Cui, Yangfan He, Zhichao Zhang","submitted_at":"2024-08-08T04:31:00Z","abstract_excerpt":"Inspired by the use of adaptive kernel-based Cohen's class time-frequency distributions (CCTFDs) for cross-term suppression, this paper aims to explore novel adaptive kernel functions for denoising, with a particular focus on non-stationary signal processing in practical applications}. We integrate Wiener filter principle and the time-frequency filtering mechanism of CCTFD to design the least-squares adaptive filter method in the Wigner-Ville distribution (WVD) domain, giving birth to the least-squares adaptive filter-based CCTFD whose kernel function can be adjusted with the input signal auto"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.04210","kind":"arxiv","version":4},"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/2408.04210/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":"2026-06-03T01:05:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LVIphbAbjZpBc58YtNMlmy3XdZ3B4A4NO8/5n4ErruxF6Ad2ytBsOYjDgb3cpNMSY+3k1fAzspEMd//oOSBLDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T00:23:49.247241Z"},"content_sha256":"ce1cc3fb478c3d038e3a2aa88b06f5e6a0826348e8d616fc9a8756dc34835427","schema_version":"1.0","event_id":"sha256:ce1cc3fb478c3d038e3a2aa88b06f5e6a0826348e8d616fc9a8756dc34835427"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IB2A4PJJQXDICOCTZFBQQ5MMWG/bundle.json","state_url":"https://pith.science/pith/IB2A4PJJQXDICOCTZFBQQ5MMWG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IB2A4PJJQXDICOCTZFBQQ5MMWG/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":"2026-07-05T00:23:49Z","links":{"resolver":"https://pith.science/pith/IB2A4PJJQXDICOCTZFBQQ5MMWG","bundle":"https://pith.science/pith/IB2A4PJJQXDICOCTZFBQQ5MMWG/bundle.json","state":"https://pith.science/pith/IB2A4PJJQXDICOCTZFBQQ5MMWG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IB2A4PJJQXDICOCTZFBQQ5MMWG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:IB2A4PJJQXDICOCTZFBQQ5MMWG","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":"a88e753c5c7a0e6f253db4e710a682c4145883a120b8f0a5efd0b5a8cffd9b75","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2024-08-08T04:31:00Z","title_canon_sha256":"380bcf114d1606779884a5649cc7ad9bb8a15cde9b2a107fc17c75a6bdb1fe7b"},"schema_version":"1.0","source":{"id":"2408.04210","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.04210","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"arxiv_version","alias_value":"2408.04210v4","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.04210","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"pith_short_12","alias_value":"IB2A4PJJQXDI","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"pith_short_16","alias_value":"IB2A4PJJQXDICOCT","created_at":"2026-06-03T01:05:03Z"},{"alias_kind":"pith_short_8","alias_value":"IB2A4PJJ","created_at":"2026-06-03T01:05:03Z"}],"graph_snapshots":[{"event_id":"sha256:ce1cc3fb478c3d038e3a2aa88b06f5e6a0826348e8d616fc9a8756dc34835427","target":"graph","created_at":"2026-06-03T01:05:03Z","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/2408.04210/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Inspired by the use of adaptive kernel-based Cohen's class time-frequency distributions (CCTFDs) for cross-term suppression, this paper aims to explore novel adaptive kernel functions for denoising, with a particular focus on non-stationary signal processing in practical applications}. We integrate Wiener filter principle and the time-frequency filtering mechanism of CCTFD to design the least-squares adaptive filter method in the Wigner-Ville distribution (WVD) domain, giving birth to the least-squares adaptive filter-based CCTFD whose kernel function can be adjusted with the input signal auto","authors_text":"Manjun Cui, Yangfan He, Zhichao Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2024-08-08T04:31:00Z","title":"Least-Squares Adaptive Filter-Based Cohen's Class Time-Frequency Distribution for Signal Denoising"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.04210","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:e9955510d4c150501777d2bbc7ad69fab2796330e67a5dd40b5607b2bfa9756c","target":"record","created_at":"2026-06-03T01:05:03Z","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":"a88e753c5c7a0e6f253db4e710a682c4145883a120b8f0a5efd0b5a8cffd9b75","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2024-08-08T04:31:00Z","title_canon_sha256":"380bcf114d1606779884a5649cc7ad9bb8a15cde9b2a107fc17c75a6bdb1fe7b"},"schema_version":"1.0","source":{"id":"2408.04210","kind":"arxiv","version":4}},"canonical_sha256":"40740e3d2985c6813853c94308758cb19f56286af83030812dca23eabd606bd8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"40740e3d2985c6813853c94308758cb19f56286af83030812dca23eabd606bd8","first_computed_at":"2026-06-03T01:05:03.617644Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-03T01:05:03.617644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iWSViUtHTnLs/ryMT5/2tahuQ9/w/UAkhez48Y6dP7EcgZhgLfzgIagXh6AgzxEaLZugFmETLGLVPd6ua7r2AA==","signature_status":"signed_v1","signed_at":"2026-06-03T01:05:03.618057Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.04210","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9955510d4c150501777d2bbc7ad69fab2796330e67a5dd40b5607b2bfa9756c","sha256:ce1cc3fb478c3d038e3a2aa88b06f5e6a0826348e8d616fc9a8756dc34835427"],"state_sha256":"8728e81fb24ed0037dad294ceb8b3f89e384a21355d7071ee5bf0f61c4325ac9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xs9nLC5ngQQ4uPssAhVEeSmXGHRrx/m6ut1Tnj0VW/oL96L+JRjevicFZZQLT5qE0/iQyBzBjM5crnQzP0k+Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T00:23:49.249163Z","bundle_sha256":"07192673a0e9757f6f60b627059ddd7df542042aaadb9fa536e0faf0729364ba"}}