{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:OBZZS4Y3GLW6SCD5SV54I7YTOJ","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":"3336b07c04aa9d0355f52251f10371bed5468db49423634937a13f4a987fcb60","cross_cats_sorted":["cs.LG","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-03-31T13:30:46Z","title_canon_sha256":"7b053c7b5af87f9a367af4f2ce36d2a7796fee0fa23d47525c940d25a7dec07f"},"schema_version":"1.0","source":{"id":"2503.24074","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.24074","created_at":"2026-07-05T10:42:04Z"},{"alias_kind":"arxiv_version","alias_value":"2503.24074v1","created_at":"2026-07-05T10:42:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.24074","created_at":"2026-07-05T10:42:04Z"},{"alias_kind":"pith_short_12","alias_value":"OBZZS4Y3GLW6","created_at":"2026-07-05T10:42:04Z"},{"alias_kind":"pith_short_16","alias_value":"OBZZS4Y3GLW6SCD5","created_at":"2026-07-05T10:42:04Z"},{"alias_kind":"pith_short_8","alias_value":"OBZZS4Y3","created_at":"2026-07-05T10:42:04Z"}],"graph_snapshots":[{"event_id":"sha256:a0663795da1bb536ad948ac48d50065f30f00f27ff32d818e6838ea2286109cf","target":"graph","created_at":"2026-07-05T10:42:04Z","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/2503.24074/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Simultaneously detecting hidden solid boundaries and reconstructing flow fields from sparse observations poses a significant inverse challenge in fluid mechanics. This study presents a physics-informed neural network (PINN) framework designed to infer the presence, shape, and motion of static or moving solid boundaries within a flow field. By integrating a body fraction parameter into the governing equations, the model enforces no-slip/no-penetration boundary conditions in solid regions while preserving conservation laws of fluid dynamics. Using partial flow field data, the method simultaneous","authors_text":"Jian Deng, Weizheng Chen, Xin Bian, Yongzheng Zhu","cross_cats":["cs.LG","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-03-31T13:30:46Z","title":"Physics-informed neural networks for hidden boundary detection and flow field reconstruction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.24074","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":"sha256:941787f425e8cfbc777cc683200f47fc7f129e2e110f28d126a04d8d8252a71b","target":"record","created_at":"2026-07-05T10:42:04Z","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":"3336b07c04aa9d0355f52251f10371bed5468db49423634937a13f4a987fcb60","cross_cats_sorted":["cs.LG","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-03-31T13:30:46Z","title_canon_sha256":"7b053c7b5af87f9a367af4f2ce36d2a7796fee0fa23d47525c940d25a7dec07f"},"schema_version":"1.0","source":{"id":"2503.24074","kind":"arxiv","version":1}},"canonical_sha256":"707399731b32ede9087d957bc47f13727ea9e6086e2973e4fe1f15d3e483fae1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"707399731b32ede9087d957bc47f13727ea9e6086e2973e4fe1f15d3e483fae1","first_computed_at":"2026-07-05T10:42:04.104388Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:42:04.104388Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2afPPAWOqZKmphROI6WRjhAKBYc8DykYy2IHiBm8b9G4ri78qHnkRVCwNP91Ad8RFoO7uQ7z5CBnf6y/l1baAA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:42:04.104784Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.24074","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:941787f425e8cfbc777cc683200f47fc7f129e2e110f28d126a04d8d8252a71b","sha256:a0663795da1bb536ad948ac48d50065f30f00f27ff32d818e6838ea2286109cf"],"state_sha256":"3084b4d2ee9ffd820758dc0fab238c4a4c9d5de66b9f7a9cf6762e5032cf9893"}