{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ESMP3K2DN5FEVZVLAIXSLQQRGH","short_pith_number":"pith:ESMP3K2D","canonical_record":{"source":{"id":"1907.07427","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2019-07-17T10:22:55Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"23408d7fb1798c0ff845d7d444d227e87e17463261b79b4bb972e41d505a9387","abstract_canon_sha256":"e118ce6b19f104daee9c49f8f585fa161b1431e1656529836a498da441742fb2"},"schema_version":"1.0"},"canonical_sha256":"2498fdab436f4a4ae6ab022f25c21131de1dddb38074f693764824c8a4739ed3","source":{"kind":"arxiv","id":"1907.07427","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07427","created_at":"2026-05-17T23:40:22Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07427v1","created_at":"2026-05-17T23:40:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07427","created_at":"2026-05-17T23:40:22Z"},{"alias_kind":"pith_short_12","alias_value":"ESMP3K2DN5FE","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"ESMP3K2DN5FEVZVL","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"ESMP3K2D","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ESMP3K2DN5FEVZVLAIXSLQQRGH","target":"record","payload":{"canonical_record":{"source":{"id":"1907.07427","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2019-07-17T10:22:55Z","cross_cats_sorted":["cs.IT","math.IT"],"title_canon_sha256":"23408d7fb1798c0ff845d7d444d227e87e17463261b79b4bb972e41d505a9387","abstract_canon_sha256":"e118ce6b19f104daee9c49f8f585fa161b1431e1656529836a498da441742fb2"},"schema_version":"1.0"},"canonical_sha256":"2498fdab436f4a4ae6ab022f25c21131de1dddb38074f693764824c8a4739ed3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:22.278979Z","signature_b64":"6mqSMdvfwUNd4sAjpLfLlu/LJ8SQud7FeyY+hbXjtjwH8BAb+kNdu+8slkH1IAtas3zWeUT1gTuELT5wtB63BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2498fdab436f4a4ae6ab022f25c21131de1dddb38074f693764824c8a4739ed3","last_reissued_at":"2026-05-17T23:40:22.278297Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:22.278297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.07427","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":"2026-05-17T23:40:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"drirP7nrVVaIuZC7elQzRc/Th4kCRLFRMJQvq1jlE6ngGGf2fC6sehQFj5XUZLMw07nL1gsnap85BkJ6N+QPDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T16:36:42.577108Z"},"content_sha256":"1226644ded25770d842504fcbbf99a3a819eae37a4255b4d653939787c961cb0","schema_version":"1.0","event_id":"sha256:1226644ded25770d842504fcbbf99a3a819eae37a4255b4d653939787c961cb0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ESMP3K2DN5FEVZVLAIXSLQQRGH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Energy-Efficient Power Control of Train-ground mmWave Communication for High Speed Trains","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IT","math.IT"],"primary_cat":"cs.NI","authors_text":"Bo Ai, Lei Wang, Pan Hui, Xia Chen, Yong Niu","submitted_at":"2019-07-17T10:22:55Z","abstract_excerpt":"High speed train system has proven to be a very flexible and attractive system that can be developed under various circumstances and in different contexts and cultures. As a result, high speed trains are widely deployed around the world. Providing more reliable and higher data rate communication services for high speed trains has become one of the most urgent challenges. With vast amounts of spectrum available, the millimeter wave (mmWave) system is able to provide transmission rates of several gigabits per second for high speed trains. At the same time, mmWave communication also suffers from "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07427","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":"2026-05-17T23:40:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1jEUZ309lJhmD57n33jDkRx+kBoNQBu1hpD30DJgct6NztlKNYe2H/W46Yy4DS9JRDJmoVvxmUlyQYIFUAq3AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T16:36:42.577873Z"},"content_sha256":"45f37b7757a363bfad6e5ac2f9ba5bb0e8d7843631b7a881cc2b196ca1b50b9a","schema_version":"1.0","event_id":"sha256:45f37b7757a363bfad6e5ac2f9ba5bb0e8d7843631b7a881cc2b196ca1b50b9a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ESMP3K2DN5FEVZVLAIXSLQQRGH/bundle.json","state_url":"https://pith.science/pith/ESMP3K2DN5FEVZVLAIXSLQQRGH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ESMP3K2DN5FEVZVLAIXSLQQRGH/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":"2026-05-23T16:36:42Z","links":{"resolver":"https://pith.science/pith/ESMP3K2DN5FEVZVLAIXSLQQRGH","bundle":"https://pith.science/pith/ESMP3K2DN5FEVZVLAIXSLQQRGH/bundle.json","state":"https://pith.science/pith/ESMP3K2DN5FEVZVLAIXSLQQRGH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ESMP3K2DN5FEVZVLAIXSLQQRGH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ESMP3K2DN5FEVZVLAIXSLQQRGH","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":"e118ce6b19f104daee9c49f8f585fa161b1431e1656529836a498da441742fb2","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2019-07-17T10:22:55Z","title_canon_sha256":"23408d7fb1798c0ff845d7d444d227e87e17463261b79b4bb972e41d505a9387"},"schema_version":"1.0","source":{"id":"1907.07427","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07427","created_at":"2026-05-17T23:40:22Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07427v1","created_at":"2026-05-17T23:40:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07427","created_at":"2026-05-17T23:40:22Z"},{"alias_kind":"pith_short_12","alias_value":"ESMP3K2DN5FE","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"ESMP3K2DN5FEVZVL","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"ESMP3K2D","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:45f37b7757a363bfad6e5ac2f9ba5bb0e8d7843631b7a881cc2b196ca1b50b9a","target":"graph","created_at":"2026-05-17T23:40:22Z","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":"High speed train system has proven to be a very flexible and attractive system that can be developed under various circumstances and in different contexts and cultures. As a result, high speed trains are widely deployed around the world. Providing more reliable and higher data rate communication services for high speed trains has become one of the most urgent challenges. With vast amounts of spectrum available, the millimeter wave (mmWave) system is able to provide transmission rates of several gigabits per second for high speed trains. At the same time, mmWave communication also suffers from ","authors_text":"Bo Ai, Lei Wang, Pan Hui, Xia Chen, Yong Niu","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2019-07-17T10:22:55Z","title":"Energy-Efficient Power Control of Train-ground mmWave Communication for High Speed Trains"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07427","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":"sha256:1226644ded25770d842504fcbbf99a3a819eae37a4255b4d653939787c961cb0","target":"record","created_at":"2026-05-17T23:40:22Z","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":"e118ce6b19f104daee9c49f8f585fa161b1431e1656529836a498da441742fb2","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2019-07-17T10:22:55Z","title_canon_sha256":"23408d7fb1798c0ff845d7d444d227e87e17463261b79b4bb972e41d505a9387"},"schema_version":"1.0","source":{"id":"1907.07427","kind":"arxiv","version":1}},"canonical_sha256":"2498fdab436f4a4ae6ab022f25c21131de1dddb38074f693764824c8a4739ed3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2498fdab436f4a4ae6ab022f25c21131de1dddb38074f693764824c8a4739ed3","first_computed_at":"2026-05-17T23:40:22.278297Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:22.278297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6mqSMdvfwUNd4sAjpLfLlu/LJ8SQud7FeyY+hbXjtjwH8BAb+kNdu+8slkH1IAtas3zWeUT1gTuELT5wtB63BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:22.278979Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.07427","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1226644ded25770d842504fcbbf99a3a819eae37a4255b4d653939787c961cb0","sha256:45f37b7757a363bfad6e5ac2f9ba5bb0e8d7843631b7a881cc2b196ca1b50b9a"],"state_sha256":"4a2955b273df48c60752bd1a98b4a6dd9a1c670f508992a042442e4221e6694e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9uSO2Ab/zMm+oCKR+L+jHJxILWGtdFLarHAFHfitiyN8LPw8ZbXYAjsLWolOBASe5JUOocTLJ/R3a8xJPILkBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T16:36:42.583212Z","bundle_sha256":"a7ec8f11f147eb9a8b66ea1955f5014fbbc0ff815eb19bfb44fe969313f35686"}}