{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ONMGYBRTWLYZ3FLEF7PG6JHTOI","short_pith_number":"pith:ONMGYBRT","canonical_record":{"source":{"id":"1901.05846","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-01-16T14:22:39Z","cross_cats_sorted":[],"title_canon_sha256":"af90ac232625f1866b65f60d272b89a391852af1864813f55ac09efe8cb51edc","abstract_canon_sha256":"079048360055e72cda71a22302b1af1f50c8adf6e2a8779fe6c13a0baca00614"},"schema_version":"1.0"},"canonical_sha256":"73586c0633b2f19d95642fde6f24f3720d7ee6af94f68224635aa63365fe657d","source":{"kind":"arxiv","id":"1901.05846","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05846","created_at":"2026-05-17T23:56:06Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05846v1","created_at":"2026-05-17T23:56:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05846","created_at":"2026-05-17T23:56:06Z"},{"alias_kind":"pith_short_12","alias_value":"ONMGYBRTWLYZ","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"ONMGYBRTWLYZ3FLE","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"ONMGYBRT","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ONMGYBRTWLYZ3FLEF7PG6JHTOI","target":"record","payload":{"canonical_record":{"source":{"id":"1901.05846","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-01-16T14:22:39Z","cross_cats_sorted":[],"title_canon_sha256":"af90ac232625f1866b65f60d272b89a391852af1864813f55ac09efe8cb51edc","abstract_canon_sha256":"079048360055e72cda71a22302b1af1f50c8adf6e2a8779fe6c13a0baca00614"},"schema_version":"1.0"},"canonical_sha256":"73586c0633b2f19d95642fde6f24f3720d7ee6af94f68224635aa63365fe657d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:06.014173Z","signature_b64":"cv39luleBajqJrG0q+d8rwZ1HHRyr9z8M2hZ1sdu6Y13EugJp+QurvxRys9p4nLJZeY/9fyVdSD3r+dCSJmWDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"73586c0633b2f19d95642fde6f24f3720d7ee6af94f68224635aa63365fe657d","last_reissued_at":"2026-05-17T23:56:06.013586Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:06.013586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.05846","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":"2026-05-17T23:56:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0ScEZIvmmFRQbmIAUMrIEuhaGWug+HXv1Wd/7qQV54K224XAyS4NnkjgZfPwMhpdrF41PogEEHvagzRFj/7UBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T18:11:02.123155Z"},"content_sha256":"67f908db323f5d4a8a059d26ffda2cd693937d9579a7a56bc1b686ac5dee51bf","schema_version":"1.0","event_id":"sha256:67f908db323f5d4a8a059d26ffda2cd693937d9579a7a56bc1b686ac5dee51bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ONMGYBRTWLYZ3FLEF7PG6JHTOI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The detection of non-Gaussian vibrations with improved spatial resolution and signal-to-noise ratio in distributed sensing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Chengdan Tan, Lijun Tang, Qian He, Rong Liu, Xiongjun Shang","submitted_at":"2019-01-16T14:22:39Z","abstract_excerpt":"In fiber-optic distributed sensing, vibration signals are mostly assumed to follow Gaussian distribution for the simplicity of signal processing. However, in real applications, vibration signals often behave as non-Gaussian processes, which have rarely been highly considered. In this paper, a higher-order cumulants algorithm based phase-sensitive optical time-domain reflectometry (OTDR) is proposed to detect and analyze non-Gaussian vibration signals accompanied with noises. When disturbances are applied on the sensing fiber, the distribution probability of Rayleigh backscattering signals will"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05846","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":""},"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":"2026-05-17T23:56:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3t+kuxcqnMVWVdC54CvCIh6F6nJrXJURsC3p5WNyQIxFEnDUP/yAsHY8h8SZJ+L6g7IdgwjFkya/XicdIZ78BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T18:11:02.123938Z"},"content_sha256":"a7b719d15e13bcfab7f43dd378421fe2838ef44ebd9f973a96aae6d2e59ceb42","schema_version":"1.0","event_id":"sha256:a7b719d15e13bcfab7f43dd378421fe2838ef44ebd9f973a96aae6d2e59ceb42"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ONMGYBRTWLYZ3FLEF7PG6JHTOI/bundle.json","state_url":"https://pith.science/pith/ONMGYBRTWLYZ3FLEF7PG6JHTOI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ONMGYBRTWLYZ3FLEF7PG6JHTOI/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":"2026-06-08T18:11:02Z","links":{"resolver":"https://pith.science/pith/ONMGYBRTWLYZ3FLEF7PG6JHTOI","bundle":"https://pith.science/pith/ONMGYBRTWLYZ3FLEF7PG6JHTOI/bundle.json","state":"https://pith.science/pith/ONMGYBRTWLYZ3FLEF7PG6JHTOI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ONMGYBRTWLYZ3FLEF7PG6JHTOI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ONMGYBRTWLYZ3FLEF7PG6JHTOI","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":"079048360055e72cda71a22302b1af1f50c8adf6e2a8779fe6c13a0baca00614","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-01-16T14:22:39Z","title_canon_sha256":"af90ac232625f1866b65f60d272b89a391852af1864813f55ac09efe8cb51edc"},"schema_version":"1.0","source":{"id":"1901.05846","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05846","created_at":"2026-05-17T23:56:06Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05846v1","created_at":"2026-05-17T23:56:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05846","created_at":"2026-05-17T23:56:06Z"},{"alias_kind":"pith_short_12","alias_value":"ONMGYBRTWLYZ","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"ONMGYBRTWLYZ3FLE","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"ONMGYBRT","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:a7b719d15e13bcfab7f43dd378421fe2838ef44ebd9f973a96aae6d2e59ceb42","target":"graph","created_at":"2026-05-17T23:56:06Z","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":"In fiber-optic distributed sensing, vibration signals are mostly assumed to follow Gaussian distribution for the simplicity of signal processing. However, in real applications, vibration signals often behave as non-Gaussian processes, which have rarely been highly considered. In this paper, a higher-order cumulants algorithm based phase-sensitive optical time-domain reflectometry (OTDR) is proposed to detect and analyze non-Gaussian vibration signals accompanied with noises. When disturbances are applied on the sensing fiber, the distribution probability of Rayleigh backscattering signals will","authors_text":"Chengdan Tan, Lijun Tang, Qian He, Rong Liu, Xiongjun Shang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-01-16T14:22:39Z","title":"The detection of non-Gaussian vibrations with improved spatial resolution and signal-to-noise ratio in distributed sensing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05846","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":"sha256:67f908db323f5d4a8a059d26ffda2cd693937d9579a7a56bc1b686ac5dee51bf","target":"record","created_at":"2026-05-17T23:56:06Z","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":"079048360055e72cda71a22302b1af1f50c8adf6e2a8779fe6c13a0baca00614","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-01-16T14:22:39Z","title_canon_sha256":"af90ac232625f1866b65f60d272b89a391852af1864813f55ac09efe8cb51edc"},"schema_version":"1.0","source":{"id":"1901.05846","kind":"arxiv","version":1}},"canonical_sha256":"73586c0633b2f19d95642fde6f24f3720d7ee6af94f68224635aa63365fe657d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73586c0633b2f19d95642fde6f24f3720d7ee6af94f68224635aa63365fe657d","first_computed_at":"2026-05-17T23:56:06.013586Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:06.013586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cv39luleBajqJrG0q+d8rwZ1HHRyr9z8M2hZ1sdu6Y13EugJp+QurvxRys9p4nLJZeY/9fyVdSD3r+dCSJmWDg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:06.014173Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.05846","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:67f908db323f5d4a8a059d26ffda2cd693937d9579a7a56bc1b686ac5dee51bf","sha256:a7b719d15e13bcfab7f43dd378421fe2838ef44ebd9f973a96aae6d2e59ceb42"],"state_sha256":"9894995c9e16579ffa8c2fae3ad7badb1308d59b7b44d46e7618b52fccef22d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8b2Td+hmsqmgNhPAUsmSaKPQYahh1Mjam7+xI3MQIqbq0Aah0EemRJf520Ek18aOUZZZ3UaEpjtVutuRJbYFAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T18:11:02.128587Z","bundle_sha256":"3919f1b15dcde43568d2f910ff6e70c5d227776f4f5cbeed76d5491252acfff4"}}