{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KPDHUH5BCOWYVUS6UOOG22RRTP","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":"660562076fea006c0c7cc88ee981ee04bbff5175024a09e5d25a147b9436dcc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-02-12T07:40:14Z","title_canon_sha256":"4e0b46d2f736ca912faa7690ab5c53c06fa4f6ae4977146023b9048584f47680"},"schema_version":"1.0","source":{"id":"1902.04265","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.04265","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"arxiv_version","alias_value":"1902.04265v2","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.04265","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"pith_short_12","alias_value":"KPDHUH5BCOWY","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"KPDHUH5BCOWYVUS6","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"KPDHUH5B","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:8cdc6fd0235ec136f33c367548285be2848edf22b7f2031f0c582bfb43d7828b","target":"graph","created_at":"2026-05-17T23:53:49Z","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":"This paper investigates the active sampling for estimation of approximately bandlimited graph signals. With the assistance of a graph filter, an approximately bandlimited graph signal can be formulated by a Gaussian random field over the graph. In contrast to offline sampling set design methods which usually rely on accurate prior knowledge about the model, unknown parameters in signal and noise distribution are allowed in the proposed active sampling algorithm. The active sampling process is divided into two alternating stages: unknown parameters are first estimated by Expectation Maximizatio","authors_text":"Bo Hu, Hui Feng, Sijie Lin, Xuan Xie","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-02-12T07:40:14Z","title":"Active Sampling for Approximately Bandlimited Graph Signals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.04265","kind":"arxiv","version":2},"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":"sha256:405edf2003c29587e31a6b6ee84d0cb100d3062fa3905471bdce6597e29f7b98","target":"record","created_at":"2026-05-17T23:53:49Z","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":"660562076fea006c0c7cc88ee981ee04bbff5175024a09e5d25a147b9436dcc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-02-12T07:40:14Z","title_canon_sha256":"4e0b46d2f736ca912faa7690ab5c53c06fa4f6ae4977146023b9048584f47680"},"schema_version":"1.0","source":{"id":"1902.04265","kind":"arxiv","version":2}},"canonical_sha256":"53c67a1fa113ad8ad25ea39c6d6a319bd043ae1ed5288a0b886e1c52a4202bd7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"53c67a1fa113ad8ad25ea39c6d6a319bd043ae1ed5288a0b886e1c52a4202bd7","first_computed_at":"2026-05-17T23:53:49.280434Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:49.280434Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dtyxXEfkfC/k/3zwiCzxxdcOa2zVJYy5zjr483+ZnsauwAsTl/UqjjvMXD57oldyGR/cC6NbuF6teZ8egmesBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:49.281037Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.04265","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:405edf2003c29587e31a6b6ee84d0cb100d3062fa3905471bdce6597e29f7b98","sha256:8cdc6fd0235ec136f33c367548285be2848edf22b7f2031f0c582bfb43d7828b"],"state_sha256":"7c61439f22c459d70c9652f4591329f4cdb09e1e518897b427b6a851ad7d536c"}