{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FSBSEIUFRDVWS35KESTLDSC3HC","short_pith_number":"pith:FSBSEIUF","canonical_record":{"source":{"id":"1909.11806","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-09-25T22:57:32Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"89cab6901cca832242dc876fac263c0b950e2ec5b3ef2d1c9ccb427701f32006","abstract_canon_sha256":"ef21235b8aecfa2d6146fb00d498f4c3f4db11b06498bb9f34ad6a8f41e7e1fa"},"schema_version":"1.0"},"canonical_sha256":"2c8322228588eb696faa24a6b1c85b388ac1fc6e4bb7dccc78d6406d1f96bcd3","source":{"kind":"arxiv","id":"1909.11806","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.11806","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"arxiv_version","alias_value":"1909.11806v1","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.11806","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"pith_short_12","alias_value":"FSBSEIUFRDVW","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"pith_short_16","alias_value":"FSBSEIUFRDVWS35K","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"pith_short_8","alias_value":"FSBSEIUF","created_at":"2026-07-05T00:07:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FSBSEIUFRDVWS35KESTLDSC3HC","target":"record","payload":{"canonical_record":{"source":{"id":"1909.11806","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-09-25T22:57:32Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"89cab6901cca832242dc876fac263c0b950e2ec5b3ef2d1c9ccb427701f32006","abstract_canon_sha256":"ef21235b8aecfa2d6146fb00d498f4c3f4db11b06498bb9f34ad6a8f41e7e1fa"},"schema_version":"1.0"},"canonical_sha256":"2c8322228588eb696faa24a6b1c85b388ac1fc6e4bb7dccc78d6406d1f96bcd3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:07:28.214754Z","signature_b64":"/G/jX/ZkoGjc2jUUPD9mpnu1CW6np9DlumLn9st89icAO3WHHa1fCJ/LAdIErH3hP94wbEignS3s8KmgZkniCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2c8322228588eb696faa24a6b1c85b388ac1fc6e4bb7dccc78d6406d1f96bcd3","last_reissued_at":"2026-07-05T00:07:28.214340Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:07:28.214340Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.11806","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":"2026-07-05T00:07:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZLwROs77WpBIg+Ku7/2x00PyGOEdzLR7mTQobgChtsqyhSG/ze7y7AGOtJE3DWyrI1Bw9NtiOgWPaueRWpijAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T19:42:58.452010Z"},"content_sha256":"02f77b3509ce2a55eb095eeb854aafc2a8bbfc6c7f554b6c1ed40e1adcbb38db","schema_version":"1.0","event_id":"sha256:02f77b3509ce2a55eb095eeb854aafc2a8bbfc6c7f554b6c1ed40e1adcbb38db"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FSBSEIUFRDVWS35KESTLDSC3HC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unit panel nodes detection by CNN on FAST reflector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.IV"],"primary_cat":"astro-ph.IM","authors_text":"Li-Chun Zhu, Wei Tang, Xin-Yi Li, Zhi-Song Zhang","submitted_at":"2019-09-25T22:57:32Z","abstract_excerpt":"The 500-meter Aperture Spherical Radio Telescope(FAST) has an active reflector. During the observation, the reflector will be deformed into a paraboloid of 300-meters. To improve its surface accuracy, we propose a scheme for photogrammetry to measure the positions of 2226 nodes on the reflector. And the way to detect the nodes in the photos is the key problem in photogrammetry. This paper applies Convolutional Neural Network(CNN) with candidate regions to detect the nodes in the photos. The experiment results show a high recognition rate of 91.5%, which is much higher than the recognition rate"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.11806","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1909.11806/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:07:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+7zOYkIxxXnxTmlr5oBJ9HTSjFYFs7WexCt/X6Vq4M4TZHPmmnG0Fa7DySa1I3+njSVvMtM9dSitZBBQ5qqhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T19:42:58.452406Z"},"content_sha256":"a2253b86031b1f38dade770b61719716250d0ffc85f90537756f4d086731118a","schema_version":"1.0","event_id":"sha256:a2253b86031b1f38dade770b61719716250d0ffc85f90537756f4d086731118a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FSBSEIUFRDVWS35KESTLDSC3HC/bundle.json","state_url":"https://pith.science/pith/FSBSEIUFRDVWS35KESTLDSC3HC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FSBSEIUFRDVWS35KESTLDSC3HC/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":"2026-07-08T19:42:58Z","links":{"resolver":"https://pith.science/pith/FSBSEIUFRDVWS35KESTLDSC3HC","bundle":"https://pith.science/pith/FSBSEIUFRDVWS35KESTLDSC3HC/bundle.json","state":"https://pith.science/pith/FSBSEIUFRDVWS35KESTLDSC3HC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FSBSEIUFRDVWS35KESTLDSC3HC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FSBSEIUFRDVWS35KESTLDSC3HC","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":"ef21235b8aecfa2d6146fb00d498f4c3f4db11b06498bb9f34ad6a8f41e7e1fa","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-09-25T22:57:32Z","title_canon_sha256":"89cab6901cca832242dc876fac263c0b950e2ec5b3ef2d1c9ccb427701f32006"},"schema_version":"1.0","source":{"id":"1909.11806","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.11806","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"arxiv_version","alias_value":"1909.11806v1","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.11806","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"pith_short_12","alias_value":"FSBSEIUFRDVW","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"pith_short_16","alias_value":"FSBSEIUFRDVWS35K","created_at":"2026-07-05T00:07:28Z"},{"alias_kind":"pith_short_8","alias_value":"FSBSEIUF","created_at":"2026-07-05T00:07:28Z"}],"graph_snapshots":[{"event_id":"sha256:a2253b86031b1f38dade770b61719716250d0ffc85f90537756f4d086731118a","target":"graph","created_at":"2026-07-05T00:07:28Z","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/1909.11806/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The 500-meter Aperture Spherical Radio Telescope(FAST) has an active reflector. During the observation, the reflector will be deformed into a paraboloid of 300-meters. To improve its surface accuracy, we propose a scheme for photogrammetry to measure the positions of 2226 nodes on the reflector. And the way to detect the nodes in the photos is the key problem in photogrammetry. This paper applies Convolutional Neural Network(CNN) with candidate regions to detect the nodes in the photos. The experiment results show a high recognition rate of 91.5%, which is much higher than the recognition rate","authors_text":"Li-Chun Zhu, Wei Tang, Xin-Yi Li, Zhi-Song Zhang","cross_cats":["eess.IV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-09-25T22:57:32Z","title":"Unit panel nodes detection by CNN on FAST reflector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.11806","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":"sha256:02f77b3509ce2a55eb095eeb854aafc2a8bbfc6c7f554b6c1ed40e1adcbb38db","target":"record","created_at":"2026-07-05T00:07:28Z","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":"ef21235b8aecfa2d6146fb00d498f4c3f4db11b06498bb9f34ad6a8f41e7e1fa","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-09-25T22:57:32Z","title_canon_sha256":"89cab6901cca832242dc876fac263c0b950e2ec5b3ef2d1c9ccb427701f32006"},"schema_version":"1.0","source":{"id":"1909.11806","kind":"arxiv","version":1}},"canonical_sha256":"2c8322228588eb696faa24a6b1c85b388ac1fc6e4bb7dccc78d6406d1f96bcd3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c8322228588eb696faa24a6b1c85b388ac1fc6e4bb7dccc78d6406d1f96bcd3","first_computed_at":"2026-07-05T00:07:28.214340Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:07:28.214340Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/G/jX/ZkoGjc2jUUPD9mpnu1CW6np9DlumLn9st89icAO3WHHa1fCJ/LAdIErH3hP94wbEignS3s8KmgZkniCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:07:28.214754Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.11806","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02f77b3509ce2a55eb095eeb854aafc2a8bbfc6c7f554b6c1ed40e1adcbb38db","sha256:a2253b86031b1f38dade770b61719716250d0ffc85f90537756f4d086731118a"],"state_sha256":"5938c2b96a7bcf8da860569c1c360e77f377c87e1accb1f40da01aa1cb977c9b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P1AR52Ay7oOsBuSSD90Idg4kjmV772woXVBx5M2mqQJ2kxOFEM5i7TafUgyL2WXaAgAT0PBN/iXyhg8Yq56HBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T19:42:58.454410Z","bundle_sha256":"87fe24a966b9d709fa7aff3b025e629bb0adf531369985e212f95f912398adae"}}