{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2AV54NNU6GGQHA33BJXZJ6G6YG","short_pith_number":"pith:2AV54NNU","canonical_record":{"source":{"id":"1905.06327","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-04-25T21:49:58Z","cross_cats_sorted":["cs.CE","cs.LG","stat.ML"],"title_canon_sha256":"663c991e9a74ffcdf6abda07dfeba0f54276e2f168baa3dc566337a0605ce002","abstract_canon_sha256":"b6f240ab2ad76901c86d6f36f593a7286edfb360a9a9fa2b922213b893a2b91e"},"schema_version":"1.0"},"canonical_sha256":"d02bde35b4f18d03837b0a6f94f8dec18e436af65946e7574ac5533ff6ba64c9","source":{"kind":"arxiv","id":"1905.06327","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.06327","created_at":"2026-05-17T23:46:06Z"},{"alias_kind":"arxiv_version","alias_value":"1905.06327v1","created_at":"2026-05-17T23:46:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.06327","created_at":"2026-05-17T23:46:06Z"},{"alias_kind":"pith_short_12","alias_value":"2AV54NNU6GGQ","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2AV54NNU6GGQHA33","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2AV54NNU","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2AV54NNU6GGQHA33BJXZJ6G6YG","target":"record","payload":{"canonical_record":{"source":{"id":"1905.06327","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-04-25T21:49:58Z","cross_cats_sorted":["cs.CE","cs.LG","stat.ML"],"title_canon_sha256":"663c991e9a74ffcdf6abda07dfeba0f54276e2f168baa3dc566337a0605ce002","abstract_canon_sha256":"b6f240ab2ad76901c86d6f36f593a7286edfb360a9a9fa2b922213b893a2b91e"},"schema_version":"1.0"},"canonical_sha256":"d02bde35b4f18d03837b0a6f94f8dec18e436af65946e7574ac5533ff6ba64c9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:06.839037Z","signature_b64":"aJS/OdNXtKUwUlT/JMb4aj3TehZ36yVkU21wmHdKdnt51ypHlQRw7nm4xSapybR96GqBzscg/GPtOXeYWvMTDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d02bde35b4f18d03837b0a6f94f8dec18e436af65946e7574ac5533ff6ba64c9","last_reissued_at":"2026-05-17T23:46:06.838417Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:06.838417Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.06327","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":"2026-05-17T23:46:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/YoqOR4uQbkNj5KNM+Kk4fghdH8e/4hOc8MkBBqvgyRD8BTgPpiFeqzr+KLjPAGC9iqkjiBe4mqNEFoFEtclAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T15:16:22.465093Z"},"content_sha256":"6d931ba5ba953512ad5bbde8cb68e298756aa11276d5ba313e194d8c4a4951fa","schema_version":"1.0","event_id":"sha256:6d931ba5ba953512ad5bbde8cb68e298756aa11276d5ba313e194d8c4a4951fa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2AV54NNU6GGQHA33BJXZJ6G6YG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A data-driven proxy to Stoke's flow in porous media","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CE","cs.LG","stat.ML"],"primary_cat":"eess.IV","authors_text":"Ali Takbiri-Borujeni, Hadi Kazemi, Nasser Nasrabadi","submitted_at":"2019-04-25T21:49:58Z","abstract_excerpt":"The objective for this work is to develop a data-driven proxy to high-fidelity numerical flow simulations using digital images. The proposed model can capture the flow field and permeability in a large verity of digital porous media based on solid grain geometry and pore size distribution by detailed analyses of the local pore geometry and the local flow fields. To develop the model, the detailed pore space geometry and simulation runs data from 3500 two-dimensional high-fidelity Lattice Boltzmann simulation runs are used to train and to predict the solutions with a high accuracy in much less "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.06327","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":"2026-05-17T23:46:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Yp5a8Qbp/9Gm3wUqKWrZioVZBcQAGVOONJxlCu7sa01p/z87+l66z92VOy3Z5Wvn9+tXyF53Z4fTAC9czBsDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T15:16:22.465468Z"},"content_sha256":"f85e7a0fa44aa6e2a3409885488aee335ff15a4ee7caa4d5be7726fd8cb23674","schema_version":"1.0","event_id":"sha256:f85e7a0fa44aa6e2a3409885488aee335ff15a4ee7caa4d5be7726fd8cb23674"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2AV54NNU6GGQHA33BJXZJ6G6YG/bundle.json","state_url":"https://pith.science/pith/2AV54NNU6GGQHA33BJXZJ6G6YG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2AV54NNU6GGQHA33BJXZJ6G6YG/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":"2026-06-26T15:16:22Z","links":{"resolver":"https://pith.science/pith/2AV54NNU6GGQHA33BJXZJ6G6YG","bundle":"https://pith.science/pith/2AV54NNU6GGQHA33BJXZJ6G6YG/bundle.json","state":"https://pith.science/pith/2AV54NNU6GGQHA33BJXZJ6G6YG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2AV54NNU6GGQHA33BJXZJ6G6YG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2AV54NNU6GGQHA33BJXZJ6G6YG","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":"b6f240ab2ad76901c86d6f36f593a7286edfb360a9a9fa2b922213b893a2b91e","cross_cats_sorted":["cs.CE","cs.LG","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-04-25T21:49:58Z","title_canon_sha256":"663c991e9a74ffcdf6abda07dfeba0f54276e2f168baa3dc566337a0605ce002"},"schema_version":"1.0","source":{"id":"1905.06327","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.06327","created_at":"2026-05-17T23:46:06Z"},{"alias_kind":"arxiv_version","alias_value":"1905.06327v1","created_at":"2026-05-17T23:46:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.06327","created_at":"2026-05-17T23:46:06Z"},{"alias_kind":"pith_short_12","alias_value":"2AV54NNU6GGQ","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2AV54NNU6GGQHA33","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2AV54NNU","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:f85e7a0fa44aa6e2a3409885488aee335ff15a4ee7caa4d5be7726fd8cb23674","target":"graph","created_at":"2026-05-17T23:46:06Z","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":"The objective for this work is to develop a data-driven proxy to high-fidelity numerical flow simulations using digital images. The proposed model can capture the flow field and permeability in a large verity of digital porous media based on solid grain geometry and pore size distribution by detailed analyses of the local pore geometry and the local flow fields. To develop the model, the detailed pore space geometry and simulation runs data from 3500 two-dimensional high-fidelity Lattice Boltzmann simulation runs are used to train and to predict the solutions with a high accuracy in much less ","authors_text":"Ali Takbiri-Borujeni, Hadi Kazemi, Nasser Nasrabadi","cross_cats":["cs.CE","cs.LG","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-04-25T21:49:58Z","title":"A data-driven proxy to Stoke's flow in porous media"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.06327","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":"sha256:6d931ba5ba953512ad5bbde8cb68e298756aa11276d5ba313e194d8c4a4951fa","target":"record","created_at":"2026-05-17T23:46:06Z","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":"b6f240ab2ad76901c86d6f36f593a7286edfb360a9a9fa2b922213b893a2b91e","cross_cats_sorted":["cs.CE","cs.LG","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-04-25T21:49:58Z","title_canon_sha256":"663c991e9a74ffcdf6abda07dfeba0f54276e2f168baa3dc566337a0605ce002"},"schema_version":"1.0","source":{"id":"1905.06327","kind":"arxiv","version":1}},"canonical_sha256":"d02bde35b4f18d03837b0a6f94f8dec18e436af65946e7574ac5533ff6ba64c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d02bde35b4f18d03837b0a6f94f8dec18e436af65946e7574ac5533ff6ba64c9","first_computed_at":"2026-05-17T23:46:06.838417Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:06.838417Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aJS/OdNXtKUwUlT/JMb4aj3TehZ36yVkU21wmHdKdnt51ypHlQRw7nm4xSapybR96GqBzscg/GPtOXeYWvMTDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:06.839037Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.06327","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d931ba5ba953512ad5bbde8cb68e298756aa11276d5ba313e194d8c4a4951fa","sha256:f85e7a0fa44aa6e2a3409885488aee335ff15a4ee7caa4d5be7726fd8cb23674"],"state_sha256":"995109df07f96c3ec46333ab7c5a10411c9bcd323b5b655217c86dd853269a80"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+cDbiwBlQXUbW9Ej35ehysVKEkg2z1MUgGFVBf8K6gD2LEAODYKplEldHsGQmWv2zOEl0KCIDwMA4Sz+lS4tBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T15:16:22.467369Z","bundle_sha256":"8104a34f501cccdcecdb1a65ff9e9cfa6c929c46004fb500d552aa40bcb22e1f"}}