{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LANERF32ACXHPJZ7ADR3YUZZJP","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":"5e71b13a436d2bad142785ebe6c672a59be5042fe86ee46a8c48326e92480551","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-03-02T14:59:22Z","title_canon_sha256":"b75a106888ff65d69b57fa35d4376ad6ff29e718c5ee33179e302effb9541d61"},"schema_version":"1.0","source":{"id":"1803.02670","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.02670","created_at":"2026-05-18T00:21:49Z"},{"alias_kind":"arxiv_version","alias_value":"1803.02670v1","created_at":"2026-05-18T00:21:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.02670","created_at":"2026-05-18T00:21:49Z"},{"alias_kind":"pith_short_12","alias_value":"LANERF32ACXH","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"LANERF32ACXHPJZ7","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"LANERF32","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:2840dcb0b4a5c52a1310d394cb4a2b7440efe25648e16d9111632dfb06d63717","target":"graph","created_at":"2026-05-18T00:21:49Z","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":"A sparse Dirichlet prior is proposed for estimating the abundance vector of hyperspectral images with a nonlinear mixing model. This sparse prior is led to an unmixing procedure in a semi-supervised scenario in which exact materials are unknown. The nonlinear model is a polynomial post-nonlinear mixing model that represents each hyperspectral pixel as a nonlinear function of pure spectral signatures corrupted by additive white noise. Simulation results show more than 50% improvement in the estimation error.","authors_text":"Fahime Amiri, Mohammad Hossein Kahaei","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-03-02T14:59:22Z","title":"Bayesian Unmixing using Sparse Dirichlet Prior with Polynomial Post-nonlinear Mixing Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.02670","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:ca5b96dea729337500b56e13da14c6201995df2b8c861901356d32f864560628","target":"record","created_at":"2026-05-18T00:21:49Z","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":"5e71b13a436d2bad142785ebe6c672a59be5042fe86ee46a8c48326e92480551","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-03-02T14:59:22Z","title_canon_sha256":"b75a106888ff65d69b57fa35d4376ad6ff29e718c5ee33179e302effb9541d61"},"schema_version":"1.0","source":{"id":"1803.02670","kind":"arxiv","version":1}},"canonical_sha256":"581a48977a00ae77a73f00e3bc53394bfe0d09bceb9e8e609dc50f90b52fbf34","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"581a48977a00ae77a73f00e3bc53394bfe0d09bceb9e8e609dc50f90b52fbf34","first_computed_at":"2026-05-18T00:21:49.562897Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:49.562897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"t6ItvHJ/0ixrqKAOfwKigQLIYE/Ytuj2yy/iPI7+ZDu3H/7YXVQJWYPRNdqAyThZ6L7VbietByPgzk96JEbSCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:49.563534Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.02670","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca5b96dea729337500b56e13da14c6201995df2b8c861901356d32f864560628","sha256:2840dcb0b4a5c52a1310d394cb4a2b7440efe25648e16d9111632dfb06d63717"],"state_sha256":"b3e527128f36d01742e6bc9686f27a93dbd56e9ca6cd26881e9fa7ff8ddddc16"}