{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:WOFUTFGESQ5IV7VSUTIBEGVWE3","short_pith_number":"pith:WOFUTFGE","canonical_record":{"source":{"id":"1402.2062","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.optics","submitted_at":"2014-02-10T08:09:49Z","cross_cats_sorted":[],"title_canon_sha256":"af8efa4001da9a550903066c2e88a31ff189e3bb9c4e3aa4870027d66fa64ee3","abstract_canon_sha256":"c6a8ca29549aad95775b5cd02b33b3de8b9a489294a4ad394d1af57bc2e839c3"},"schema_version":"1.0"},"canonical_sha256":"b38b4994c4943a8afeb2a4d0121ab626f3d6b9d942c2009dd7bfc2f6f9697b62","source":{"kind":"arxiv","id":"1402.2062","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.2062","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"arxiv_version","alias_value":"1402.2062v1","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.2062","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"pith_short_12","alias_value":"WOFUTFGESQ5I","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WOFUTFGESQ5IV7VS","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WOFUTFGE","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:WOFUTFGESQ5IV7VSUTIBEGVWE3","target":"record","payload":{"canonical_record":{"source":{"id":"1402.2062","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.optics","submitted_at":"2014-02-10T08:09:49Z","cross_cats_sorted":[],"title_canon_sha256":"af8efa4001da9a550903066c2e88a31ff189e3bb9c4e3aa4870027d66fa64ee3","abstract_canon_sha256":"c6a8ca29549aad95775b5cd02b33b3de8b9a489294a4ad394d1af57bc2e839c3"},"schema_version":"1.0"},"canonical_sha256":"b38b4994c4943a8afeb2a4d0121ab626f3d6b9d942c2009dd7bfc2f6f9697b62","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:45.981501Z","signature_b64":"EnhBSSn+dUA/JqqVtjogAzmr/uQjelsYaSXuuffkGmpJAi9ZV4mdCKRrY5XF1SkL1vmaITlyuGYg6GU03TiqDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b38b4994c4943a8afeb2a4d0121ab626f3d6b9d942c2009dd7bfc2f6f9697b62","last_reissued_at":"2026-05-18T01:44:45.980938Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:45.980938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.2062","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":"2026-05-18T01:44:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2TwTl7M3loj0bsTyxboSBZkT7sPBlNmWf0T7cHICYC2Gql2IF+jRU2wKHuP25HA1KnzvP4rf7CpDbs4xBV94BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:15:37.350999Z"},"content_sha256":"d356a1f23151add1ee898402f7866b966c725d5f2af9bdee2038f779bf0080b9","schema_version":"1.0","event_id":"sha256:d356a1f23151add1ee898402f7866b966c725d5f2af9bdee2038f779bf0080b9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:WOFUTFGESQ5IV7VSUTIBEGVWE3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A model combining spectrum standardization and dominant factor based partial least square method for carbon analysis in coal by laser-induced breakdown spectroscopy","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Weidou Ni, Xiongwei Li, Yangting Fu, Zheng Li, Zhe Wang","submitted_at":"2014-02-10T08:09:49Z","abstract_excerpt":"Successful quantitative measurement of carbon content in coal using laser-induced breakdown spectroscopy (LIBS) is suffered from relatively low precision and accuracy. In the present work, the spectrum standardization method was combined with the dominant factor based partial least square (PLS) method to improve the measurement accuracy of carbon content in coal by LIBS. The combination model employed the spectrum standardization method to convert the carbon line intensity into standard state for more accurately calculating the dominant carbon concentration, and then applied PLS with full spec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.2062","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":"2026-05-18T01:44:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rauJ1NSMqJoven2I1+qhzPCpBoqn2mZJXMIUNwlqls6npFXN2iLxl+ysI6KT2ETXGUXIFJRAQn1UHzGLUc/5Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:15:37.351352Z"},"content_sha256":"84c48a4109f150b5c35b44eddd9e745697f7ad42b353a5fc1f1016ca9bf5b15b","schema_version":"1.0","event_id":"sha256:84c48a4109f150b5c35b44eddd9e745697f7ad42b353a5fc1f1016ca9bf5b15b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WOFUTFGESQ5IV7VSUTIBEGVWE3/bundle.json","state_url":"https://pith.science/pith/WOFUTFGESQ5IV7VSUTIBEGVWE3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WOFUTFGESQ5IV7VSUTIBEGVWE3/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":"2026-06-02T01:15:37Z","links":{"resolver":"https://pith.science/pith/WOFUTFGESQ5IV7VSUTIBEGVWE3","bundle":"https://pith.science/pith/WOFUTFGESQ5IV7VSUTIBEGVWE3/bundle.json","state":"https://pith.science/pith/WOFUTFGESQ5IV7VSUTIBEGVWE3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WOFUTFGESQ5IV7VSUTIBEGVWE3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:WOFUTFGESQ5IV7VSUTIBEGVWE3","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":"c6a8ca29549aad95775b5cd02b33b3de8b9a489294a4ad394d1af57bc2e839c3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.optics","submitted_at":"2014-02-10T08:09:49Z","title_canon_sha256":"af8efa4001da9a550903066c2e88a31ff189e3bb9c4e3aa4870027d66fa64ee3"},"schema_version":"1.0","source":{"id":"1402.2062","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.2062","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"arxiv_version","alias_value":"1402.2062v1","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.2062","created_at":"2026-05-18T01:44:45Z"},{"alias_kind":"pith_short_12","alias_value":"WOFUTFGESQ5I","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WOFUTFGESQ5IV7VS","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WOFUTFGE","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:84c48a4109f150b5c35b44eddd9e745697f7ad42b353a5fc1f1016ca9bf5b15b","target":"graph","created_at":"2026-05-18T01:44:45Z","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":"Successful quantitative measurement of carbon content in coal using laser-induced breakdown spectroscopy (LIBS) is suffered from relatively low precision and accuracy. In the present work, the spectrum standardization method was combined with the dominant factor based partial least square (PLS) method to improve the measurement accuracy of carbon content in coal by LIBS. The combination model employed the spectrum standardization method to convert the carbon line intensity into standard state for more accurately calculating the dominant carbon concentration, and then applied PLS with full spec","authors_text":"Weidou Ni, Xiongwei Li, Yangting Fu, Zheng Li, Zhe Wang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.optics","submitted_at":"2014-02-10T08:09:49Z","title":"A model combining spectrum standardization and dominant factor based partial least square method for carbon analysis in coal by laser-induced breakdown spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.2062","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:d356a1f23151add1ee898402f7866b966c725d5f2af9bdee2038f779bf0080b9","target":"record","created_at":"2026-05-18T01:44:45Z","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":"c6a8ca29549aad95775b5cd02b33b3de8b9a489294a4ad394d1af57bc2e839c3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.optics","submitted_at":"2014-02-10T08:09:49Z","title_canon_sha256":"af8efa4001da9a550903066c2e88a31ff189e3bb9c4e3aa4870027d66fa64ee3"},"schema_version":"1.0","source":{"id":"1402.2062","kind":"arxiv","version":1}},"canonical_sha256":"b38b4994c4943a8afeb2a4d0121ab626f3d6b9d942c2009dd7bfc2f6f9697b62","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b38b4994c4943a8afeb2a4d0121ab626f3d6b9d942c2009dd7bfc2f6f9697b62","first_computed_at":"2026-05-18T01:44:45.980938Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:45.980938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EnhBSSn+dUA/JqqVtjogAzmr/uQjelsYaSXuuffkGmpJAi9ZV4mdCKRrY5XF1SkL1vmaITlyuGYg6GU03TiqDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:45.981501Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.2062","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d356a1f23151add1ee898402f7866b966c725d5f2af9bdee2038f779bf0080b9","sha256:84c48a4109f150b5c35b44eddd9e745697f7ad42b353a5fc1f1016ca9bf5b15b"],"state_sha256":"c01a575f4f7e46479f91b8560d65356eced185ecf20fd7e934dcb13b62b659a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"thkLpwALk2KJv5EF/YsoUud+sGogeJVR0wnRZ+gYBKIHFS18utYS0RTloBw7io3D1MyFLCY52ezqJ/4s22bZBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T01:15:37.353355Z","bundle_sha256":"25a434e92ca716209921bcf5932dec3ea4673c4b91cff457bef0d2bd13c653b8"}}