{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:XFIHRPTHNCDBFJ7RVCG6LSHBWB","short_pith_number":"pith:XFIHRPTH","schema_version":"1.0","canonical_sha256":"b95078be67688612a7f1a88de5c8e1b07f7b171fa93bf74eee0ddd790ef84173","source":{"kind":"arxiv","id":"1911.01845","version":2},"attestation_state":"computed","paper":{"title":"Chinese cities' air quality pattern and correlation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.soc-ph","authors_text":"Jianyao Li, Weibing Deng, Wei Li, Wenjun Zhang, Zhanpeng Guan, Zhu Su","submitted_at":"2019-11-04T04:04:34Z","abstract_excerpt":"Air quality impacts people's health and daily life, affects the sensitive ecosystems, and even restrains a country's development. By collecting and processing the time series data of Air Quality Index (AQI) of 363 cities of China from Jan. 2015 to Mar. 2019, we dedicated to characterize the universal patterns, the clustering and correlation of air quality of different cities by using the methods of complex network and time series analysis. The main results are as follows: 1) The Air Quality Network of China (AQNC) is constructed by using the Planar Maximally Filtered Graph (PMFG) method. The g"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1911.01845","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2019-11-04T04:04:34Z","cross_cats_sorted":[],"title_canon_sha256":"6877abbb2e18bd9f67d0b437cfb5abb39a04885b824a06ad38506893231e4229","abstract_canon_sha256":"1951d068d8f4b6c0ab6b22e99ca87763d444e8c7a2a32af055025aceeab1848f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:12:27.022327Z","signature_b64":"eQ4fHzeVCGd7YgsEaGXuZcD68JjOmn8y7RQqjVqAMpcNe2lSgKchhgEGUB44iVuhwOqlQzUwiPMAza+p68ysCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b95078be67688612a7f1a88de5c8e1b07f7b171fa93bf74eee0ddd790ef84173","last_reissued_at":"2026-07-05T01:12:27.021915Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:12:27.021915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Chinese cities' air quality pattern and correlation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.soc-ph","authors_text":"Jianyao Li, Weibing Deng, Wei Li, Wenjun Zhang, Zhanpeng Guan, Zhu Su","submitted_at":"2019-11-04T04:04:34Z","abstract_excerpt":"Air quality impacts people's health and daily life, affects the sensitive ecosystems, and even restrains a country's development. By collecting and processing the time series data of Air Quality Index (AQI) of 363 cities of China from Jan. 2015 to Mar. 2019, we dedicated to characterize the universal patterns, the clustering and correlation of air quality of different cities by using the methods of complex network and time series analysis. The main results are as follows: 1) The Air Quality Network of China (AQNC) is constructed by using the Planar Maximally Filtered Graph (PMFG) method. The g"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.01845","kind":"arxiv","version":2},"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/1911.01845/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1911.01845","created_at":"2026-07-05T01:12:27.021974+00:00"},{"alias_kind":"arxiv_version","alias_value":"1911.01845v2","created_at":"2026-07-05T01:12:27.021974+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.01845","created_at":"2026-07-05T01:12:27.021974+00:00"},{"alias_kind":"pith_short_12","alias_value":"XFIHRPTHNCDB","created_at":"2026-07-05T01:12:27.021974+00:00"},{"alias_kind":"pith_short_16","alias_value":"XFIHRPTHNCDBFJ7R","created_at":"2026-07-05T01:12:27.021974+00:00"},{"alias_kind":"pith_short_8","alias_value":"XFIHRPTH","created_at":"2026-07-05T01:12:27.021974+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB","json":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB.json","graph_json":"https://pith.science/api/pith-number/XFIHRPTHNCDBFJ7RVCG6LSHBWB/graph.json","events_json":"https://pith.science/api/pith-number/XFIHRPTHNCDBFJ7RVCG6LSHBWB/events.json","paper":"https://pith.science/paper/XFIHRPTH"},"agent_actions":{"view_html":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB","download_json":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB.json","view_paper":"https://pith.science/paper/XFIHRPTH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1911.01845&json=true","fetch_graph":"https://pith.science/api/pith-number/XFIHRPTHNCDBFJ7RVCG6LSHBWB/graph.json","fetch_events":"https://pith.science/api/pith-number/XFIHRPTHNCDBFJ7RVCG6LSHBWB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB/action/storage_attestation","attest_author":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB/action/author_attestation","sign_citation":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB/action/citation_signature","submit_replication":"https://pith.science/pith/XFIHRPTHNCDBFJ7RVCG6LSHBWB/action/replication_record"}},"created_at":"2026-07-05T01:12:27.021974+00:00","updated_at":"2026-07-05T01:12:27.021974+00:00"}