{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZFXR5NIMRFSTY5GDVRRVGQN735","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":"2399e93071a310ad3c3410afd1cb4314e4149d8ca99409b9ce5b8a474c7a4ac6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-02-06T08:01:13Z","title_canon_sha256":"4d99af37476cedd994493c41cdbe733b4e27b907fcd1b0611e4c9584f6cdf7c3"},"schema_version":"1.0","source":{"id":"1602.02224","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.02224","created_at":"2026-05-18T01:07:17Z"},{"alias_kind":"arxiv_version","alias_value":"1602.02224v1","created_at":"2026-05-18T01:07:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.02224","created_at":"2026-05-18T01:07:17Z"},{"alias_kind":"pith_short_12","alias_value":"ZFXR5NIMRFST","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZFXR5NIMRFSTY5GD","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZFXR5NIM","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:981b575b2b835f480943fbda6154ae2ca932105ef5a0471bc31aaa1495b4290a","target":"graph","created_at":"2026-05-18T01:07:17Z","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":"Unified gas kinetic scheme (UGKS) is an asymptotic preserving scheme for the kinetic equations. It is superior for transition flow simulations, and has been validated in the past years. However, compared to the well known discrete ordinate method (DOM) which is a classical numerical method solving the kinetic equations, the UGKS needs more computational resources. In this study, we propose a simplification of the unified gas kinetic scheme. It allows almost identical numerical cost as the DOM, but predicts numerical results as accurate as the UGKS. Based on the observation that the equilibrium","authors_text":"Kun Xu, Songze Chen, Zhaoli Guo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-02-06T08:01:13Z","title":"A simplification of the unified gas kinetic scheme"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.02224","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":"sha256:3a7749b429f7eb696ff6495b6c00bfa4c1d941bcd8bf0531ed92b49faa019973","target":"record","created_at":"2026-05-18T01:07:17Z","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":"2399e93071a310ad3c3410afd1cb4314e4149d8ca99409b9ce5b8a474c7a4ac6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-02-06T08:01:13Z","title_canon_sha256":"4d99af37476cedd994493c41cdbe733b4e27b907fcd1b0611e4c9584f6cdf7c3"},"schema_version":"1.0","source":{"id":"1602.02224","kind":"arxiv","version":1}},"canonical_sha256":"c96f1eb50c89653c74c3ac635341bfdf4bed7291df469747dd723dbb4d59126c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c96f1eb50c89653c74c3ac635341bfdf4bed7291df469747dd723dbb4d59126c","first_computed_at":"2026-05-18T01:07:17.082402Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:17.082402Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PGroCCiYa4k9D7x0wiz0bUBIIe32vqM/Xamp4f7kZ/rrfi/gPKzhpccfkwsfFNgmAoZ9udhGARjPu+l9c4MCAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:17.082998Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.02224","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a7749b429f7eb696ff6495b6c00bfa4c1d941bcd8bf0531ed92b49faa019973","sha256:981b575b2b835f480943fbda6154ae2ca932105ef5a0471bc31aaa1495b4290a"],"state_sha256":"3bab4ab795e7d09f5928a18fc0d4f1bcc7c02ec6bd9bfb2296daec68b6498072"}