{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:4OZJYTKLGLDKWRRLSLUPUSPJET","short_pith_number":"pith:4OZJYTKL","canonical_record":{"source":{"id":"2307.00250","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2023-07-01T06:55:06Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"ac8888482f236e41a8a30fb55637afd6571540074888872e41852bcea862ca91","abstract_canon_sha256":"bf382d3eb37bd1c048af36b94436ddd0443e932d6dc05409c44bca2eacc2997b"},"schema_version":"1.0"},"canonical_sha256":"e3b29c4d4b32c6ab462b92e8fa49e924dfafb72fdd647343ba19eed1d374b6b5","source":{"kind":"arxiv","id":"2307.00250","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.00250","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"2307.00250v1","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.00250","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"4OZJYTKLGLDK","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4OZJYTKLGLDKWRRL","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4OZJYTKL","created_at":"2026-07-05T06:26:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:4OZJYTKLGLDKWRRLSLUPUSPJET","target":"record","payload":{"canonical_record":{"source":{"id":"2307.00250","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2023-07-01T06:55:06Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"ac8888482f236e41a8a30fb55637afd6571540074888872e41852bcea862ca91","abstract_canon_sha256":"bf382d3eb37bd1c048af36b94436ddd0443e932d6dc05409c44bca2eacc2997b"},"schema_version":"1.0"},"canonical_sha256":"e3b29c4d4b32c6ab462b92e8fa49e924dfafb72fdd647343ba19eed1d374b6b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:26:53.824038Z","signature_b64":"/xzUvNJIBHiKo+kTuFB4fHpTpwLiZNJnQ9c+S55wvvAH1Gb9ZOm8qn9zTnOlHBsxdxWvDL6Gj/slzueRVo12Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e3b29c4d4b32c6ab462b92e8fa49e924dfafb72fdd647343ba19eed1d374b6b5","last_reissued_at":"2026-07-05T06:26:53.823626Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:26:53.823626Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2307.00250","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":"2026-07-05T06:26:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qFjZikmhWCmRnd4ypZb8POV50eSOvn0850INfHFPxxBC7rmzZt1ahPcBGjRtaB0BNkC7twlebM+2NVhSqWwpBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T03:44:12.658911Z"},"content_sha256":"89c53577077790fdf7542e3965aae4b131a733a7a4b1bf6c2226f2aaedaaebb9","schema_version":"1.0","event_id":"sha256:89c53577077790fdf7542e3965aae4b131a733a7a4b1bf6c2226f2aaedaaebb9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:4OZJYTKLGLDKWRRLSLUPUSPJET","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"THUIR2 at NTCIR-16 Session Search (SS) Task","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.IR","authors_text":"Min Zhang, Shaoping Ma, Weihang Su, Xiangsheng Li, Yiqun Liu","submitted_at":"2023-07-01T06:55:06Z","abstract_excerpt":"Our team(THUIR2) participated in both FOSS and POSS subtasks of the NTCIR-161 Session Search (SS) Task. This paper describes our approaches and results. In the FOSS subtask, we submit five runs using learning-to-rank and fine-tuned pre-trained language models. We fine-tuned the pre-trained language model with ad-hoc data and session information and assembled them by a learning-to-rank method. The assembled model achieves the best performance among all participants in the preliminary evaluation. In the POSS subtask, we used an assembled model which also achieves the best performance in the prel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.00250","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/2307.00250/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":"2026-07-05T06:26:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X8HxssMkNS8ZxI94FCgLk7NpBZbbenfCskFaLD1fmApZMR2r5rRhT+Ybg2zVeGvxYQLU54cHeLPM2mQECyC/Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T03:44:12.659418Z"},"content_sha256":"614e790f0349fe95b3f1d11f1c2df4a7ac076879f34c99a3308683a0e956ee5a","schema_version":"1.0","event_id":"sha256:614e790f0349fe95b3f1d11f1c2df4a7ac076879f34c99a3308683a0e956ee5a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4OZJYTKLGLDKWRRLSLUPUSPJET/bundle.json","state_url":"https://pith.science/pith/4OZJYTKLGLDKWRRLSLUPUSPJET/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4OZJYTKLGLDKWRRLSLUPUSPJET/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":"2026-08-08T03:44:12Z","links":{"resolver":"https://pith.science/pith/4OZJYTKLGLDKWRRLSLUPUSPJET","bundle":"https://pith.science/pith/4OZJYTKLGLDKWRRLSLUPUSPJET/bundle.json","state":"https://pith.science/pith/4OZJYTKLGLDKWRRLSLUPUSPJET/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4OZJYTKLGLDKWRRLSLUPUSPJET/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:4OZJYTKLGLDKWRRLSLUPUSPJET","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":"bf382d3eb37bd1c048af36b94436ddd0443e932d6dc05409c44bca2eacc2997b","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2023-07-01T06:55:06Z","title_canon_sha256":"ac8888482f236e41a8a30fb55637afd6571540074888872e41852bcea862ca91"},"schema_version":"1.0","source":{"id":"2307.00250","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.00250","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"2307.00250v1","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.00250","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"4OZJYTKLGLDK","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4OZJYTKLGLDKWRRL","created_at":"2026-07-05T06:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4OZJYTKL","created_at":"2026-07-05T06:26:53Z"}],"graph_snapshots":[{"event_id":"sha256:614e790f0349fe95b3f1d11f1c2df4a7ac076879f34c99a3308683a0e956ee5a","target":"graph","created_at":"2026-07-05T06:26:53Z","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/2307.00250/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Our team(THUIR2) participated in both FOSS and POSS subtasks of the NTCIR-161 Session Search (SS) Task. This paper describes our approaches and results. In the FOSS subtask, we submit five runs using learning-to-rank and fine-tuned pre-trained language models. We fine-tuned the pre-trained language model with ad-hoc data and session information and assembled them by a learning-to-rank method. The assembled model achieves the best performance among all participants in the preliminary evaluation. In the POSS subtask, we used an assembled model which also achieves the best performance in the prel","authors_text":"Min Zhang, Shaoping Ma, Weihang Su, Xiangsheng Li, Yiqun Liu","cross_cats":["cs.AI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2023-07-01T06:55:06Z","title":"THUIR2 at NTCIR-16 Session Search (SS) Task"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.00250","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":"sha256:89c53577077790fdf7542e3965aae4b131a733a7a4b1bf6c2226f2aaedaaebb9","target":"record","created_at":"2026-07-05T06:26:53Z","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":"bf382d3eb37bd1c048af36b94436ddd0443e932d6dc05409c44bca2eacc2997b","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2023-07-01T06:55:06Z","title_canon_sha256":"ac8888482f236e41a8a30fb55637afd6571540074888872e41852bcea862ca91"},"schema_version":"1.0","source":{"id":"2307.00250","kind":"arxiv","version":1}},"canonical_sha256":"e3b29c4d4b32c6ab462b92e8fa49e924dfafb72fdd647343ba19eed1d374b6b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e3b29c4d4b32c6ab462b92e8fa49e924dfafb72fdd647343ba19eed1d374b6b5","first_computed_at":"2026-07-05T06:26:53.823626Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:26:53.823626Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/xzUvNJIBHiKo+kTuFB4fHpTpwLiZNJnQ9c+S55wvvAH1Gb9ZOm8qn9zTnOlHBsxdxWvDL6Gj/slzueRVo12Cg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:26:53.824038Z","signed_message":"canonical_sha256_bytes"},"source_id":"2307.00250","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89c53577077790fdf7542e3965aae4b131a733a7a4b1bf6c2226f2aaedaaebb9","sha256:614e790f0349fe95b3f1d11f1c2df4a7ac076879f34c99a3308683a0e956ee5a"],"state_sha256":"6969e30bd2b7eff7378759ac01e951a717152fe47417869efc42ab515f144c49"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tgCmvNXU/PGk7cphkiSX/mA25LagR4kjoCweJfo4+QI8eU3c72UeO6spsJbh5D8JFBrSpLoaUrPE22Jx0pb4CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T03:44:12.664278Z","bundle_sha256":"ca88a94e6c620d3f450391170ca8a143d952504005a51ae89a9e67cc49413d84"}}